/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*! \file */
#include <config.h>
#include <errno.h>
#include <stdbool.h>
#include <isc/file.h>
#include <isc/hex.h>
#include <isc/mutex.h>
#include <isc/pool.h>
#include <isc/print.h>
#include <isc/random.h>
#include <isc/ratelimiter.h>
#include <isc/refcount.h>
#include <isc/rwlock.h>
#include <isc/serial.h>
#include <isc/stats.h>
#include <isc/stdtime.h>
#include <isc/strerror.h>
#include <isc/string.h>
#include <isc/taskpool.h>
#include <isc/thread.h>
#include <isc/timer.h>
#include <isc/util.h>
#include <dns/acache.h>
#include <dns/acl.h>
#include <dns/adb.h>
#include <dns/callbacks.h>
#include <dns/catz.h>
#include <dns/db.h>
#include <dns/dbiterator.h>
#include <dns/dlz.h>
#include <dns/dnssec.h>
#include <dns/events.h>
#include <dns/journal.h>
#include <dns/keydata.h>
#include <dns/keytable.h>
#include <dns/keyvalues.h>
#include <dns/log.h>
#include <dns/master.h>
#include <dns/masterdump.h>
#include <dns/message.h>
#include <dns/name.h>
#include <dns/nsec.h>
#include <dns/nsec3.h>
#include <dns/peer.h>
#include <dns/private.h>
#include <dns/rcode.h>
#include <dns/rdata.h>
#include <dns/rdataclass.h>
#include <dns/rdatalist.h>
#include <dns/rdataset.h>
#include <dns/rdatasetiter.h>
#include <dns/rdatastruct.h>
#include <dns/rdatatype.h>
#include <dns/request.h>
#include <dns/resolver.h>
#include <dns/result.h>
#include <dns/rriterator.h>
#include <dns/soa.h>
#include <dns/ssu.h>
#include <dns/stats.h>
#include <dns/time.h>
#include <dns/tsig.h>
#include <dns/update.h>
#include <dns/xfrin.h>
#include <dns/zone.h>
#include <dns/zt.h>
#include <dst/dst.h>
#include "zone_p.h"
#define ZONE_MAGIC ISC_MAGIC('Z', 'O', 'N', 'E')
#define DNS_ZONE_VALID(zone) ISC_MAGIC_VALID(zone, ZONE_MAGIC)
#define NOTIFY_MAGIC ISC_MAGIC('N', 't', 'f', 'y')
#define DNS_NOTIFY_VALID(notify) ISC_MAGIC_VALID(notify, NOTIFY_MAGIC)
#define STUB_MAGIC ISC_MAGIC('S', 't', 'u', 'b')
#define DNS_STUB_VALID(stub) ISC_MAGIC_VALID(stub, STUB_MAGIC)
#define ZONEMGR_MAGIC ISC_MAGIC('Z', 'm', 'g', 'r')
#define DNS_ZONEMGR_VALID(stub) ISC_MAGIC_VALID(stub, ZONEMGR_MAGIC)
#define LOAD_MAGIC ISC_MAGIC('L', 'o', 'a', 'd')
#define DNS_LOAD_VALID(load) ISC_MAGIC_VALID(load, LOAD_MAGIC)
#define FORWARD_MAGIC ISC_MAGIC('F', 'o', 'r', 'w')
#define DNS_FORWARD_VALID(load) ISC_MAGIC_VALID(load, FORWARD_MAGIC)
#define IO_MAGIC ISC_MAGIC('Z', 'm', 'I', 'O')
#define DNS_IO_VALID(load) ISC_MAGIC_VALID(load, IO_MAGIC)
/*%
* Ensure 'a' is at least 'min' but not more than 'max'.
*/
#define RANGE(a, min, max) \
(((a) < (min)) ? (min) : ((a) < (max) ? (a) : (max)))
#define NSEC3REMOVE(x) (((x) & DNS_NSEC3FLAG_REMOVE) != 0)
/*%
* Key flags
*/
#define REVOKE(x) ((dst_key_flags(x) & DNS_KEYFLAG_REVOKE) != 0)
#define KSK(x) ((dst_key_flags(x) & DNS_KEYFLAG_KSK) != 0)
#define ALG(x) dst_key_alg(x)
/*
* Default values.
*/
#define DNS_DEFAULT_IDLEIN 3600 /*%< 1 hour */
#define DNS_DEFAULT_IDLEOUT 3600 /*%< 1 hour */
#define MAX_XFER_TIME (2*3600) /*%< Documented default is 2 hours */
#define RESIGN_DELAY 3600 /*%< 1 hour */
#ifndef DNS_MAX_EXPIRE
#define DNS_MAX_EXPIRE 14515200 /*%< 24 weeks */
#endif
#ifndef DNS_DUMP_DELAY
#define DNS_DUMP_DELAY 900 /*%< 15 minutes */
#endif
typedef struct dns_notify dns_notify_t;
typedef struct dns_stub dns_stub_t;
typedef struct dns_load dns_load_t;
typedef struct dns_forward dns_forward_t;
typedef ISC_LIST(dns_forward_t) dns_forwardlist_t;
typedef struct dns_io dns_io_t;
typedef ISC_LIST(dns_io_t) dns_iolist_t;
typedef struct dns_signing dns_signing_t;
typedef ISC_LIST(dns_signing_t) dns_signinglist_t;
typedef struct dns_nsec3chain dns_nsec3chain_t;
typedef ISC_LIST(dns_nsec3chain_t) dns_nsec3chainlist_t;
typedef struct dns_keyfetch dns_keyfetch_t;
typedef struct dns_asyncload dns_asyncload_t;
typedef struct dns_include dns_include_t;
#define DNS_ZONE_CHECKLOCK
#ifdef DNS_ZONE_CHECKLOCK
#define LOCK_ZONE(z) \
do { LOCK(&(z)->lock); \
INSIST((z)->locked == false); \
(z)->locked = true; \
} while (0)
#define UNLOCK_ZONE(z) \
do { (z)->locked = false; UNLOCK(&(z)->lock); } while (0)
#define LOCKED_ZONE(z) ((z)->locked)
#define TRYLOCK_ZONE(result, z) \
do { \
result = isc_mutex_trylock(&(z)->lock); \
if (result == ISC_R_SUCCESS) { \
INSIST((z)->locked == false); \
(z)->locked = true; \
} \
} while (0)
#else
#define LOCK_ZONE(z) LOCK(&(z)->lock)
#define UNLOCK_ZONE(z) UNLOCK(&(z)->lock)
#define LOCKED_ZONE(z) true
#define TRYLOCK_ZONE(result, z) \
do { result = isc_mutex_trylock(&(z)->lock); } while (0)
#endif
#ifdef ISC_RWLOCK_USEATOMIC
#define ZONEDB_INITLOCK(l) isc_rwlock_init((l), 0, 0)
#define ZONEDB_DESTROYLOCK(l) isc_rwlock_destroy(l)
#define ZONEDB_LOCK(l, t) RWLOCK((l), (t))
#define ZONEDB_UNLOCK(l, t) RWUNLOCK((l), (t))
#else
#define ZONEDB_INITLOCK(l) isc_mutex_init(l)
#define ZONEDB_DESTROYLOCK(l) DESTROYLOCK(l)
#define ZONEDB_LOCK(l, t) LOCK(l)
#define ZONEDB_UNLOCK(l, t) UNLOCK(l)
#endif
#ifdef ENABLE_AFL
extern bool dns_fuzzing_resolver;
#endif
struct dns_zone {
/* Unlocked */
unsigned int magic;
isc_mutex_t lock;
#ifdef DNS_ZONE_CHECKLOCK
bool locked;
#endif
isc_mem_t *mctx;
isc_refcount_t erefs;
#ifdef ISC_RWLOCK_USEATOMIC
isc_rwlock_t dblock;
#else
isc_mutex_t dblock;
#endif
dns_db_t *db; /* Locked by dblock */
/* Locked */
dns_zonemgr_t *zmgr;
ISC_LINK(dns_zone_t) link; /* Used by zmgr. */
isc_timer_t *timer;
unsigned int irefs;
dns_name_t origin;
char *masterfile;
ISC_LIST(dns_include_t) includes; /* Include files */
ISC_LIST(dns_include_t) newincludes; /* Loading */
unsigned int nincludes;
dns_masterformat_t masterformat;
const dns_master_style_t *masterstyle;
char *journal;
int32_t journalsize;
dns_rdataclass_t rdclass;
dns_zonetype_t type;
unsigned int flags;
unsigned int options;
unsigned int options2;
unsigned int db_argc;
char **db_argv;
isc_time_t expiretime;
isc_time_t refreshtime;
isc_time_t dumptime;
isc_time_t loadtime;
isc_time_t notifytime;
isc_time_t resigntime;
isc_time_t keywarntime;
isc_time_t signingtime;
isc_time_t nsec3chaintime;
isc_time_t refreshkeytime;
uint32_t refreshkeyinterval;
uint32_t refreshkeycount;
uint32_t refresh;
uint32_t retry;
uint32_t expire;
uint32_t minimum;
isc_stdtime_t key_expiry;
isc_stdtime_t log_key_expired_timer;
char *keydirectory;
uint32_t maxrefresh;
uint32_t minrefresh;
uint32_t maxretry;
uint32_t minretry;
uint32_t maxrecords;
isc_sockaddr_t *masters;
isc_dscp_t *masterdscps;
dns_name_t **masterkeynames;
bool *mastersok;
unsigned int masterscnt;
unsigned int curmaster;
isc_sockaddr_t masteraddr;
dns_notifytype_t notifytype;
isc_sockaddr_t *notify;
dns_name_t **notifykeynames;
isc_dscp_t *notifydscp;
unsigned int notifycnt;
isc_sockaddr_t notifyfrom;
isc_task_t *task;
isc_task_t *loadtask;
isc_sockaddr_t notifysrc4;
isc_sockaddr_t notifysrc6;
isc_sockaddr_t xfrsource4;
isc_sockaddr_t xfrsource6;
isc_sockaddr_t altxfrsource4;
isc_sockaddr_t altxfrsource6;
isc_sockaddr_t sourceaddr;
isc_dscp_t notifysrc4dscp;
isc_dscp_t notifysrc6dscp;
isc_dscp_t xfrsource4dscp;
isc_dscp_t xfrsource6dscp;
isc_dscp_t altxfrsource4dscp;
isc_dscp_t altxfrsource6dscp;
dns_xfrin_ctx_t *xfr; /* task locked */
dns_tsigkey_t *tsigkey; /* key used for xfr */
/* Access Control Lists */
dns_acl_t *update_acl;
dns_acl_t *forward_acl;
dns_acl_t *notify_acl;
dns_acl_t *query_acl;
dns_acl_t *queryon_acl;
dns_acl_t *xfr_acl;
bool update_disabled;
bool zero_no_soa_ttl;
dns_severity_t check_names;
ISC_LIST(dns_notify_t) notifies;
dns_request_t *request;
dns_loadctx_t *lctx;
dns_io_t *readio;
dns_dumpctx_t *dctx;
dns_io_t *writeio;
uint32_t maxxfrin;
uint32_t maxxfrout;
uint32_t idlein;
uint32_t idleout;
isc_event_t ctlevent;
dns_ssutable_t *ssutable;
uint32_t sigvalidityinterval;
uint32_t sigresigninginterval;
dns_view_t *view;
dns_view_t *prev_view;
dns_acache_t *acache;
dns_checkmxfunc_t checkmx;
dns_checksrvfunc_t checksrv;
dns_checknsfunc_t checkns;
/*%
* Zones in certain states such as "waiting for zone transfer"
* or "zone transfer in progress" are kept on per-state linked lists
* in the zone manager using the 'statelink' field. The 'statelist'
* field points at the list the zone is currently on. It the zone
* is not on any such list, statelist is NULL.
*/
ISC_LINK(dns_zone_t) statelink;
dns_zonelist_t *statelist;
/*%
* Statistics counters about zone management.
*/
isc_stats_t *stats;
/*%
* Optional per-zone statistics counters. Counted outside of this
* module.
*/
dns_zonestat_level_t statlevel;
bool requeststats_on;
isc_stats_t *requeststats;
dns_stats_t *rcvquerystats;
uint32_t notifydelay;
dns_isselffunc_t isself;
void *isselfarg;
char * strnamerd;
char * strname;
char * strrdclass;
char * strviewname;
/*%
* Serial number for deferred journal compaction.
*/
uint32_t compact_serial;
/*%
* Keys that are signing the zone for the first time.
*/
dns_signinglist_t signing;
dns_nsec3chainlist_t nsec3chain;
/*%
* List of outstanding NSEC3PARAM change requests.
*/
isc_eventlist_t setnsec3param_queue;
/*%
* Signing / re-signing quantum stopping parameters.
*/
uint32_t signatures;
uint32_t nodes;
dns_rdatatype_t privatetype;
/*%
* Autosigning/key-maintenance options
*/
uint32_t keyopts;
/*%
* True if added by "rndc addzone"
*/
bool added;
/*%
* True if added by automatically by named.
*/
bool automatic;
/*%
* response policy data to be relayed to the database
*/
dns_rpz_zones_t *rpzs;
dns_rpz_num_t rpz_num;
/*%
* catalog zone data
*/
dns_catz_zones_t *catzs;
/*%
* parent catalog zone
*/
dns_catz_zone_t *parentcatz;
/*%
* Serial number update method.
*/
dns_updatemethod_t updatemethod;
/*%
* whether ixfr is requested
*/
bool requestixfr;
/*%
* whether EDNS EXPIRE is requested
*/
bool requestexpire;
/*%
* Outstanding forwarded UPDATE requests.
*/
dns_forwardlist_t forwards;
dns_zone_t *raw;
dns_zone_t *secure;
bool sourceserialset;
uint32_t sourceserial;
/*%
* maximum zone ttl
*/
dns_ttl_t maxttl;
/*
* Inline zone signing state.
*/
dns_diff_t rss_diff;
isc_eventlist_t rss_events;
isc_eventlist_t rss_post;
dns_dbversion_t *rss_newver;
dns_dbversion_t *rss_oldver;
dns_db_t *rss_db;
dns_zone_t *rss_raw;
isc_event_t *rss_event;
dns_update_state_t *rss_state;
};
#define zonediff_init(z, d) \
do { \
dns__zonediff_t *_z = (z); \
(_z)->diff = (d); \
(_z)->offline = false; \
} while (0)
#define DNS_ZONE_FLAG(z,f) ((z)->flags & (f))
#define DNS_ZONE_SETFLAG(z,f) do { \
INSIST(LOCKED_ZONE(z)); \
(z)->flags |= (f); \
} while (0)
#define DNS_ZONE_CLRFLAG(z,f) do { \
INSIST(LOCKED_ZONE(z)); \
(z)->flags &= ~(f); \
} while (0)
/* XXX MPA these may need to go back into zone.h */
#define DNS_ZONEFLG_REFRESH 0x00000001U /*%< refresh check in progress */
#define DNS_ZONEFLG_NEEDDUMP 0x00000002U /*%< zone need consolidation */
#define DNS_ZONEFLG_USEVC 0x00000004U /*%< use tcp for refresh query */
#define DNS_ZONEFLG_DUMPING 0x00000008U /*%< a dump is in progress */
#define DNS_ZONEFLG_HASINCLUDE 0x00000010U /*%< $INCLUDE in zone file */
#define DNS_ZONEFLG_LOADED 0x00000020U /*%< database has loaded */
#define DNS_ZONEFLG_EXITING 0x00000040U /*%< zone is being destroyed */
#define DNS_ZONEFLG_EXPIRED 0x00000080U /*%< zone has expired */
#define DNS_ZONEFLG_NEEDREFRESH 0x00000100U /*%< refresh check needed */
#define DNS_ZONEFLG_UPTODATE 0x00000200U /*%< zone contents are
* up-to-date */
#define DNS_ZONEFLG_NEEDNOTIFY 0x00000400U /*%< need to send out notify
* messages */
#define DNS_ZONEFLG_DIFFONRELOAD 0x00000800U /*%< generate a journal diff on
* reload */
#define DNS_ZONEFLG_NOMASTERS 0x00001000U /*%< an attempt to refresh a
* zone with no masters
* occurred */
#define DNS_ZONEFLG_LOADING 0x00002000U /*%< load from disk in progress*/
#define DNS_ZONEFLG_HAVETIMERS 0x00004000U /*%< timer values have been set
* from SOA (if not set, we
* are still using
* default timer values) */
#define DNS_ZONEFLG_FORCEXFER 0x00008000U /*%< Force a zone xfer */
#define DNS_ZONEFLG_NOREFRESH 0x00010000U
#define DNS_ZONEFLG_DIALNOTIFY 0x00020000U
#define DNS_ZONEFLG_DIALREFRESH 0x00040000U
#define DNS_ZONEFLG_SHUTDOWN 0x00080000U
#define DNS_ZONEFLAG_NOIXFR 0x00100000U /*%< IXFR failed, force AXFR */
#define DNS_ZONEFLG_FLUSH 0x00200000U
#define DNS_ZONEFLG_NOEDNS 0x00400000U
#define DNS_ZONEFLG_USEALTXFRSRC 0x00800000U
#define DNS_ZONEFLG_SOABEFOREAXFR 0x01000000U
#define DNS_ZONEFLG_NEEDCOMPACT 0x02000000U
#define DNS_ZONEFLG_REFRESHING 0x04000000U /*%< Refreshing keydata */
#define DNS_ZONEFLG_THAW 0x08000000U
#define DNS_ZONEFLG_LOADPENDING 0x10000000U /*%< Loading scheduled */
#define DNS_ZONEFLG_NODELAY 0x20000000U
#define DNS_ZONEFLG_SENDSECURE 0x40000000U
#define DNS_ZONEFLG_NEEDSTARTUPNOTIFY 0x80000000U /*%< need to send out notify
* due to the zone just
* being loaded for the
* first time. */
#define DNS_ZONE_OPTION(z,o) (((z)->options & (o)) != 0)
#define DNS_ZONE_OPTION2(z,o) (((z)->options2 & (o)) != 0)
#define DNS_ZONEKEY_OPTION(z,o) (((z)->keyopts & (o)) != 0)
/* Flags for zone_load() */
#define DNS_ZONELOADFLAG_NOSTAT 0x00000001U /* Do not stat() master files */
#define DNS_ZONELOADFLAG_THAW 0x00000002U /* Thaw the zone on successful
load. */
#define UNREACH_CHACHE_SIZE 10U
#define UNREACH_HOLD_TIME 600 /* 10 minutes */
#define CHECK(op) \
do { result = (op); \
if (result != ISC_R_SUCCESS) goto failure; \
} while (0)
struct dns_unreachable {
isc_sockaddr_t remote;
isc_sockaddr_t local;
uint32_t expire;
uint32_t last;
uint32_t count;
};
struct dns_zonemgr {
unsigned int magic;
isc_mem_t * mctx;
int refs; /* Locked by rwlock */
isc_taskmgr_t * taskmgr;
isc_timermgr_t * timermgr;
isc_socketmgr_t * socketmgr;
isc_taskpool_t * zonetasks;
isc_taskpool_t * loadtasks;
isc_task_t * task;
isc_pool_t * mctxpool;
isc_ratelimiter_t * notifyrl;
isc_ratelimiter_t * refreshrl;
isc_ratelimiter_t * startupnotifyrl;
isc_ratelimiter_t * startuprefreshrl;
isc_rwlock_t rwlock;
isc_mutex_t iolock;
isc_rwlock_t urlock;
/* Locked by rwlock. */
dns_zonelist_t zones;
dns_zonelist_t waiting_for_xfrin;
dns_zonelist_t xfrin_in_progress;
/* Configuration data. */
uint32_t transfersin;
uint32_t transfersperns;
unsigned int notifyrate;
unsigned int startupnotifyrate;
unsigned int serialqueryrate;
unsigned int startupserialqueryrate;
/* Locked by iolock */
uint32_t iolimit;
uint32_t ioactive;
dns_iolist_t high;
dns_iolist_t low;
/* Locked by urlock. */
/* LRU cache */
struct dns_unreachable unreachable[UNREACH_CHACHE_SIZE];
};
/*%
* Hold notify state.
*/
struct dns_notify {
unsigned int magic;
unsigned int flags;
isc_mem_t *mctx;
dns_zone_t *zone;
dns_adbfind_t *find;
dns_request_t *request;
dns_name_t ns;
isc_sockaddr_t dst;
dns_tsigkey_t *key;
isc_dscp_t dscp;
ISC_LINK(dns_notify_t) link;
isc_event_t *event;
};
#define DNS_NOTIFY_NOSOA 0x0001U
#define DNS_NOTIFY_STARTUP 0x0002U
/*%
* dns_stub holds state while performing a 'stub' transfer.
* 'db' is the zone's 'db' or a new one if this is the initial
* transfer.
*/
struct dns_stub {
unsigned int magic;
isc_mem_t *mctx;
dns_zone_t *zone;
dns_db_t *db;
dns_dbversion_t *version;
};
/*%
* Hold load state.
*/
struct dns_load {
unsigned int magic;
isc_mem_t *mctx;
dns_zone_t *zone;
dns_db_t *db;
isc_time_t loadtime;
dns_rdatacallbacks_t callbacks;
};
/*%
* Hold forward state.
*/
struct dns_forward {
unsigned int magic;
isc_mem_t *mctx;
dns_zone_t *zone;
isc_buffer_t *msgbuf;
dns_request_t *request;
uint32_t which;
isc_sockaddr_t addr;
dns_updatecallback_t callback;
void *callback_arg;
unsigned int options;
ISC_LINK(dns_forward_t) link;
};
/*%
* Hold IO request state.
*/
struct dns_io {
unsigned int magic;
dns_zonemgr_t *zmgr;
bool high;
isc_task_t *task;
ISC_LINK(dns_io_t) link;
isc_event_t *event;
};
/*%
* Hold state for when we are signing a zone with a new
* DNSKEY as result of an update.
*/
struct dns_signing {
unsigned int magic;
dns_db_t *db;
dns_dbiterator_t *dbiterator;
dns_secalg_t algorithm;
uint16_t keyid;
bool deleteit;
bool done;
ISC_LINK(dns_signing_t) link;
};
struct dns_nsec3chain {
unsigned int magic;
dns_db_t *db;
dns_dbiterator_t *dbiterator;
dns_rdata_nsec3param_t nsec3param;
unsigned char salt[255];
bool done;
bool seen_nsec;
bool delete_nsec;
bool save_delete_nsec;
ISC_LINK(dns_nsec3chain_t) link;
};
/*%<
* 'dbiterator' contains a iterator for the database. If we are creating
* a NSEC3 chain only the non-NSEC3 nodes will be iterated. If we are
* removing a NSEC3 chain then both NSEC3 and non-NSEC3 nodes will be
* iterated.
*
* 'nsec3param' contains the parameters of the NSEC3 chain being created
* or removed.
*
* 'salt' is buffer space and is referenced via 'nsec3param.salt'.
*
* 'seen_nsec' will be set to true if, while iterating the zone to create a
* NSEC3 chain, a NSEC record is seen.
*
* 'delete_nsec' will be set to true if, at the completion of the creation
* of a NSEC3 chain, 'seen_nsec' is true. If 'delete_nsec' is true then we
* are in the process of deleting the NSEC chain.
*
* 'save_delete_nsec' is used to store the initial state of 'delete_nsec'
* so it can be recovered in the event of a error.
*/
struct dns_keyfetch {
dns_fixedname_t name;
dns_rdataset_t keydataset;
dns_rdataset_t dnskeyset;
dns_rdataset_t dnskeysigset;
dns_zone_t *zone;
dns_db_t *db;
dns_fetch_t *fetch;
};
/*%
* Hold state for an asynchronous load
*/
struct dns_asyncload {
dns_zone_t *zone;
dns_zt_zoneloaded_t loaded;
void *loaded_arg;
bool newonly;
};
/*%
* Reference to an include file encountered during loading
*/
struct dns_include {
char *name;
isc_time_t filetime;
ISC_LINK(dns_include_t) link;
};
/*
* These can be overridden by the -T mkeytimers option on the command
* line, so that we can test with shorter periods than specified in
* RFC 5011.
*/
#define HOUR 3600
#define DAY (24*HOUR)
#define MONTH (30*DAY)
LIBDNS_EXTERNAL_DATA unsigned int dns_zone_mkey_hour = HOUR;
LIBDNS_EXTERNAL_DATA unsigned int dns_zone_mkey_day = DAY;
LIBDNS_EXTERNAL_DATA unsigned int dns_zone_mkey_month = MONTH;
#define SEND_BUFFER_SIZE 2048
static void zone_settimer(dns_zone_t *, isc_time_t *);
static void cancel_refresh(dns_zone_t *);
static void zone_debuglog(dns_zone_t *zone, const char *, int debuglevel,
const char *msg, ...) ISC_FORMAT_PRINTF(4, 5);
static void notify_log(dns_zone_t *zone, int level, const char *fmt, ...)
ISC_FORMAT_PRINTF(3, 4);
static void queue_xfrin(dns_zone_t *zone);
static isc_result_t update_one_rr(dns_db_t *db, dns_dbversion_t *ver,
dns_diff_t *diff, dns_diffop_t op,
dns_name_t *name, dns_ttl_t ttl,
dns_rdata_t *rdata);
static void zone_unload(dns_zone_t *zone);
static void zone_expire(dns_zone_t *zone);
static void zone_iattach(dns_zone_t *source, dns_zone_t **target);
static void zone_idetach(dns_zone_t **zonep);
static isc_result_t zone_replacedb(dns_zone_t *zone, dns_db_t *db,
bool dump);
static inline void zone_attachdb(dns_zone_t *zone, dns_db_t *db);
static inline void zone_detachdb(dns_zone_t *zone);
static isc_result_t default_journal(dns_zone_t *zone);
static void zone_xfrdone(dns_zone_t *zone, isc_result_t result);
static isc_result_t zone_postload(dns_zone_t *zone, dns_db_t *db,
isc_time_t loadtime, isc_result_t result);
static void zone_needdump(dns_zone_t *zone, unsigned int delay);
static void zone_shutdown(isc_task_t *, isc_event_t *);
static void zone_loaddone(void *arg, isc_result_t result);
static isc_result_t zone_startload(dns_db_t *db, dns_zone_t *zone,
isc_time_t loadtime);
static void zone_namerd_tostr(dns_zone_t *zone, char *buf, size_t length);
static void zone_name_tostr(dns_zone_t *zone, char *buf, size_t length);
static void zone_rdclass_tostr(dns_zone_t *zone, char *buf, size_t length);
static void zone_viewname_tostr(dns_zone_t *zone, char *buf, size_t length);
static isc_result_t zone_send_secureserial(dns_zone_t *zone,
uint32_t serial);
#if 0
/* ondestroy example */
static void dns_zonemgr_dbdestroyed(isc_task_t *task, isc_event_t *event);
#endif
static void refresh_callback(isc_task_t *, isc_event_t *);
static void stub_callback(isc_task_t *, isc_event_t *);
static void queue_soa_query(dns_zone_t *zone);
static void soa_query(isc_task_t *, isc_event_t *);
static void ns_query(dns_zone_t *zone, dns_rdataset_t *soardataset,
dns_stub_t *stub);
static int message_count(dns_message_t *msg, dns_section_t section,
dns_rdatatype_t type);
static void notify_cancel(dns_zone_t *zone);
static void notify_find_address(dns_notify_t *notify);
static void notify_send(dns_notify_t *notify);
static isc_result_t notify_createmessage(dns_zone_t *zone,
unsigned int flags,
dns_message_t **messagep);
static void notify_done(isc_task_t *task, isc_event_t *event);
static void notify_send_toaddr(isc_task_t *task, isc_event_t *event);
static isc_result_t zone_dump(dns_zone_t *, bool);
static void got_transfer_quota(isc_task_t *task, isc_event_t *event);
static isc_result_t zmgr_start_xfrin_ifquota(dns_zonemgr_t *zmgr,
dns_zone_t *zone);
static void zmgr_resume_xfrs(dns_zonemgr_t *zmgr, bool multi);
static void zonemgr_free(dns_zonemgr_t *zmgr);
static isc_result_t zonemgr_getio(dns_zonemgr_t *zmgr, bool high,
isc_task_t *task, isc_taskaction_t action,
void *arg, dns_io_t **iop);
static void zonemgr_putio(dns_io_t **iop);
static void zonemgr_cancelio(dns_io_t *io);
static void rss_post(dns_zone_t *, isc_event_t *);
static isc_result_t
zone_get_from_db(dns_zone_t *zone, dns_db_t *db, unsigned int *nscount,
unsigned int *soacount, uint32_t *serial,
uint32_t *refresh, uint32_t *retry,
uint32_t *expire, uint32_t *minimum,
unsigned int *errors);
static void zone_freedbargs(dns_zone_t *zone);
static void forward_callback(isc_task_t *task, isc_event_t *event);
static void zone_saveunique(dns_zone_t *zone, const char *path,
const char *templat);
static void zone_maintenance(dns_zone_t *zone);
static void zone_notify(dns_zone_t *zone, isc_time_t *now);
static void dump_done(void *arg, isc_result_t result);
static isc_result_t zone_signwithkey(dns_zone_t *zone, dns_secalg_t algorithm,
uint16_t keyid,
bool deleteit);
static isc_result_t delete_nsec(dns_db_t *db, dns_dbversion_t *ver,
dns_dbnode_t *node, dns_name_t *name,
dns_diff_t *diff);
static void zone_rekey(dns_zone_t *zone);
static isc_result_t zone_send_securedb(dns_zone_t *zone, dns_db_t *db);
static void setrl(isc_ratelimiter_t *rl, unsigned int *rate,
unsigned int value);
#define ENTER zone_debuglog(zone, me, 1, "enter")
static const unsigned int dbargc_default = 1;
static const char *dbargv_default[] = { "rbt" };
#define DNS_ZONE_JITTER_ADD(a, b, c) \
do { \
isc_interval_t _i; \
uint32_t _j; \
_j = isc_random_jitter((b), (b)/4); \
isc_interval_set(&_i, _j, 0); \
if (isc_time_add((a), &_i, (c)) != ISC_R_SUCCESS) { \
dns_zone_log(zone, ISC_LOG_WARNING, \
"epoch approaching: upgrade required: " \
"now + %s failed", #b); \
isc_interval_set(&_i, _j/2, 0); \
(void)isc_time_add((a), &_i, (c)); \
} \
} while (0)
#define DNS_ZONE_TIME_ADD(a, b, c) \
do { \
isc_interval_t _i; \
isc_interval_set(&_i, (b), 0); \
if (isc_time_add((a), &_i, (c)) != ISC_R_SUCCESS) { \
dns_zone_log(zone, ISC_LOG_WARNING, \
"epoch approaching: upgrade required: " \
"now + %s failed", #b); \
isc_interval_set(&_i, (b)/2, 0); \
(void)isc_time_add((a), &_i, (c)); \
} \
} while (0)
typedef struct nsec3param nsec3param_t;
struct nsec3param {
unsigned char data[DNS_NSEC3PARAM_BUFFERSIZE + 1];
unsigned int length;
bool nsec;
bool replace;
ISC_LINK(nsec3param_t) link;
};
typedef ISC_LIST(nsec3param_t) nsec3paramlist_t;
struct np3event {
isc_event_t event;
nsec3param_t params;
};
struct ssevent {
isc_event_t event;
uint32_t serial;
};
/*%
* Increment resolver-related statistics counters. Zone must be locked.
*/
static inline void
inc_stats(dns_zone_t *zone, isc_statscounter_t counter) {
if (zone->stats != NULL)
isc_stats_increment(zone->stats, counter);
}
/***
*** Public functions.
***/
isc_result_t
dns_zone_create(dns_zone_t **zonep, isc_mem_t *mctx) {
isc_result_t result;
dns_zone_t *zone;
isc_time_t now;
REQUIRE(zonep != NULL && *zonep == NULL);
REQUIRE(mctx != NULL);
TIME_NOW(&now);
zone = isc_mem_get(mctx, sizeof(*zone));
if (zone == NULL) {
return (ISC_R_NOMEMORY);
}
zone->mctx = NULL;
isc_mem_attach(mctx, &zone->mctx);
result = isc_mutex_init(&zone->lock);
if (result != ISC_R_SUCCESS) {
goto free_zone;
}
result = ZONEDB_INITLOCK(&zone->dblock);
if (result != ISC_R_SUCCESS) {
goto free_mutex;
}
/* XXX MPA check that all elements are initialised */
#ifdef DNS_ZONE_CHECKLOCK
zone->locked = false;
#endif
zone->db = NULL;
zone->zmgr = NULL;
ISC_LINK_INIT(zone, link);
result = isc_refcount_init(&zone->erefs, 1); /* Implicit attach. */
if (result != ISC_R_SUCCESS) {
goto free_dblock;
}
zone->irefs = 0;
dns_name_init(&zone->origin, NULL);
zone->strnamerd = NULL;
zone->strname = NULL;
zone->strrdclass = NULL;
zone->strviewname = NULL;
zone->masterfile = NULL;
ISC_LIST_INIT(zone->includes);
ISC_LIST_INIT(zone->newincludes);
zone->nincludes = 0;
zone->masterformat = dns_masterformat_none;
zone->masterstyle = NULL;
zone->keydirectory = NULL;
zone->journalsize = -1;
zone->journal = NULL;
zone->rdclass = dns_rdataclass_none;
zone->type = dns_zone_none;
zone->flags = 0;
zone->options = 0;
zone->options2 = 0;
zone->keyopts = 0;
zone->db_argc = 0;
zone->db_argv = NULL;
isc_time_settoepoch(&zone->expiretime);
isc_time_settoepoch(&zone->refreshtime);
isc_time_settoepoch(&zone->dumptime);
isc_time_settoepoch(&zone->loadtime);
zone->notifytime = now;
isc_time_settoepoch(&zone->resigntime);
isc_time_settoepoch(&zone->keywarntime);
isc_time_settoepoch(&zone->signingtime);
isc_time_settoepoch(&zone->nsec3chaintime);
isc_time_settoepoch(&zone->refreshkeytime);
zone->refreshkeyinterval = 0;
zone->refreshkeycount = 0;
zone->refresh = DNS_ZONE_DEFAULTREFRESH;
zone->retry = DNS_ZONE_DEFAULTRETRY;
zone->expire = 0;
zone->minimum = 0;
zone->maxrefresh = DNS_ZONE_MAXREFRESH;
zone->minrefresh = DNS_ZONE_MINREFRESH;
zone->maxretry = DNS_ZONE_MAXRETRY;
zone->minretry = DNS_ZONE_MINRETRY;
zone->masters = NULL;
zone->masterdscps = NULL;
zone->masterkeynames = NULL;
zone->mastersok = NULL;
zone->masterscnt = 0;
zone->curmaster = 0;
zone->maxttl = 0;
zone->notify = NULL;
zone->notifykeynames = NULL;
zone->notifydscp = NULL;
zone->notifytype = dns_notifytype_yes;
zone->notifycnt = 0;
zone->task = NULL;
zone->loadtask = NULL;
zone->update_acl = NULL;
zone->forward_acl = NULL;
zone->notify_acl = NULL;
zone->query_acl = NULL;
zone->queryon_acl = NULL;
zone->xfr_acl = NULL;
zone->update_disabled = false;
zone->zero_no_soa_ttl = true;
zone->check_names = dns_severity_ignore;
zone->request = NULL;
zone->lctx = NULL;
zone->readio = NULL;
zone->dctx = NULL;
zone->writeio = NULL;
zone->timer = NULL;
zone->idlein = DNS_DEFAULT_IDLEIN;
zone->idleout = DNS_DEFAULT_IDLEOUT;
zone->log_key_expired_timer = 0;
ISC_LIST_INIT(zone->notifies);
isc_sockaddr_any(&zone->notifysrc4);
isc_sockaddr_any6(&zone->notifysrc6);
isc_sockaddr_any(&zone->xfrsource4);
isc_sockaddr_any6(&zone->xfrsource6);
isc_sockaddr_any(&zone->altxfrsource4);
isc_sockaddr_any6(&zone->altxfrsource6);
zone->notifysrc4dscp = -1;
zone->notifysrc6dscp = -1;
zone->xfrsource4dscp = -1;
zone->xfrsource6dscp = -1;
zone->altxfrsource4dscp = -1;
zone->altxfrsource6dscp = -1;
zone->xfr = NULL;
zone->tsigkey = NULL;
zone->maxxfrin = MAX_XFER_TIME;
zone->maxxfrout = MAX_XFER_TIME;
zone->ssutable = NULL;
zone->sigvalidityinterval = 30 * 24 * 3600;
zone->sigresigninginterval = 7 * 24 * 3600;
zone->view = NULL;
zone->prev_view = NULL;
zone->acache = NULL;
zone->checkmx = NULL;
zone->checksrv = NULL;
zone->checkns = NULL;
ISC_LINK_INIT(zone, statelink);
zone->statelist = NULL;
zone->stats = NULL;
zone->requeststats_on = false;
zone->statlevel = dns_zonestat_none;
zone->requeststats = NULL;
zone->rcvquerystats = NULL;
zone->notifydelay = 5;
zone->isself = NULL;
zone->isselfarg = NULL;
ISC_LIST_INIT(zone->signing);
ISC_LIST_INIT(zone->nsec3chain);
ISC_LIST_INIT(zone->setnsec3param_queue);
zone->signatures = 10;
zone->nodes = 100;
zone->privatetype = (dns_rdatatype_t)0xffffU;
zone->added = false;
zone->automatic = false;
zone->rpzs = NULL;
zone->rpz_num = DNS_RPZ_INVALID_NUM;
zone->catzs = NULL;
zone->parentcatz = NULL;
ISC_LIST_INIT(zone->forwards);
zone->raw = NULL;
zone->secure = NULL;
zone->sourceserial = 0;
zone->sourceserialset = false;
zone->requestixfr = true;
zone->requestexpire = true;
ISC_LIST_INIT(zone->rss_events);
ISC_LIST_INIT(zone->rss_post);
zone->rss_db = NULL;
zone->rss_raw = NULL;
zone->rss_newver = NULL;
zone->rss_oldver = NULL;
zone->rss_event = NULL;
zone->rss_state = NULL;
zone->updatemethod = dns_updatemethod_increment;
zone->maxrecords = 0U;
zone->magic = ZONE_MAGIC;
/* Must be after magic is set. */
result = dns_zone_setdbtype(zone, dbargc_default, dbargv_default);
if (result != ISC_R_SUCCESS) {
goto free_erefs;
}
ISC_EVENT_INIT(&zone->ctlevent, sizeof(zone->ctlevent), 0, NULL,
DNS_EVENT_ZONECONTROL, zone_shutdown, zone, zone,
NULL, NULL);
*zonep = zone;
return (ISC_R_SUCCESS);
free_erefs:
isc_refcount_decrement(&zone->erefs, NULL);
isc_refcount_destroy(&zone->erefs);
free_dblock:
ZONEDB_DESTROYLOCK(&zone->dblock);
free_mutex:
DESTROYLOCK(&zone->lock);
free_zone:
isc_mem_putanddetach(&zone->mctx, zone, sizeof(*zone));
return (result);
}
/*
* Free a zone. Because we require that there be no more
* outstanding events or references, no locking is necessary.
*/
static void
zone_free(dns_zone_t *zone) {
isc_mem_t *mctx = NULL;
dns_signing_t *signing;
dns_nsec3chain_t *nsec3chain;
isc_event_t *event;
dns_include_t *include;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(isc_refcount_current(&zone->erefs) == 0);
REQUIRE(zone->irefs == 0);
REQUIRE(!LOCKED_ZONE(zone));
REQUIRE(zone->timer == NULL);
REQUIRE(zone->zmgr == NULL);
/*
* Managed objects. Order is important.
*/
if (zone->request != NULL) {
dns_request_destroy(&zone->request); /* XXXMPA */
}
INSIST(zone->readio == NULL);
INSIST(zone->statelist == NULL);
INSIST(zone->writeio == NULL);
if (zone->task != NULL) {
isc_task_detach(&zone->task);
}
if (zone->loadtask != NULL) {
isc_task_detach(&zone->loadtask);
}
if (zone->view != NULL) {
dns_view_weakdetach(&zone->view);
}
if (zone->prev_view != NULL) {
dns_view_weakdetach(&zone->prev_view);
}
/* Unmanaged objects */
while (!ISC_LIST_EMPTY(zone->setnsec3param_queue)) {
event = ISC_LIST_HEAD(zone->setnsec3param_queue);
ISC_LIST_UNLINK(zone->setnsec3param_queue, event, ev_link);
isc_event_free(&event);
}
while (!ISC_LIST_EMPTY(zone->rss_post)) {
event = ISC_LIST_HEAD(zone->rss_post);
ISC_LIST_UNLINK(zone->rss_post, event, ev_link);
isc_event_free(&event);
}
for (signing = ISC_LIST_HEAD(zone->signing);
signing != NULL;
signing = ISC_LIST_HEAD(zone->signing)) {
ISC_LIST_UNLINK(zone->signing, signing, link);
dns_db_detach(&signing->db);
dns_dbiterator_destroy(&signing->dbiterator);
isc_mem_put(zone->mctx, signing, sizeof *signing);
}
for (nsec3chain = ISC_LIST_HEAD(zone->nsec3chain);
nsec3chain != NULL;
nsec3chain = ISC_LIST_HEAD(zone->nsec3chain)) {
ISC_LIST_UNLINK(zone->nsec3chain, nsec3chain, link);
dns_db_detach(&nsec3chain->db);
dns_dbiterator_destroy(&nsec3chain->dbiterator);
isc_mem_put(zone->mctx, nsec3chain, sizeof *nsec3chain);
}
for (include = ISC_LIST_HEAD(zone->includes);
include != NULL;
include = ISC_LIST_HEAD(zone->includes)) {
ISC_LIST_UNLINK(zone->includes, include, link);
isc_mem_free(zone->mctx, include->name);
isc_mem_put(zone->mctx, include, sizeof *include);
}
for (include = ISC_LIST_HEAD(zone->newincludes);
include != NULL;
include = ISC_LIST_HEAD(zone->newincludes)) {
ISC_LIST_UNLINK(zone->newincludes, include, link);
isc_mem_free(zone->mctx, include->name);
isc_mem_put(zone->mctx, include, sizeof *include);
}
if (zone->masterfile != NULL) {
isc_mem_free(zone->mctx, zone->masterfile);
}
zone->masterfile = NULL;
if (zone->keydirectory != NULL) {
isc_mem_free(zone->mctx, zone->keydirectory);
}
zone->keydirectory = NULL;
zone->journalsize = -1;
if (zone->journal != NULL) {
isc_mem_free(zone->mctx, zone->journal);
}
zone->journal = NULL;
if (zone->stats != NULL) {
isc_stats_detach(&zone->stats);
}
if (zone->requeststats != NULL) {
isc_stats_detach(&zone->requeststats);
}
if (zone->rcvquerystats != NULL){
dns_stats_detach(&zone->rcvquerystats);
}
if (zone->db != NULL) {
zone_detachdb(zone);
}
if (zone->acache != NULL) {
dns_acache_detach(&zone->acache);
}
if (zone->rpzs != NULL) {
REQUIRE(zone->rpz_num < zone->rpzs->p.num_zones);
dns_rpz_detach_rpzs(&zone->rpzs);
zone->rpz_num = DNS_RPZ_INVALID_NUM;
}
if (zone->catzs != NULL) {
dns_catz_catzs_detach(&zone->catzs);
}
zone_freedbargs(zone);
RUNTIME_CHECK(dns_zone_setmasterswithkeys(zone, NULL,
NULL, 0) == ISC_R_SUCCESS);
RUNTIME_CHECK(dns_zone_setalsonotify(zone, NULL, 0) == ISC_R_SUCCESS);
zone->check_names = dns_severity_ignore;
if (zone->update_acl != NULL) {
dns_acl_detach(&zone->update_acl);
}
if (zone->forward_acl != NULL) {
dns_acl_detach(&zone->forward_acl);
}
if (zone->notify_acl != NULL) {
dns_acl_detach(&zone->notify_acl);
}
if (zone->query_acl != NULL) {
dns_acl_detach(&zone->query_acl);
}
if (zone->queryon_acl != NULL) {
dns_acl_detach(&zone->queryon_acl);
}
if (zone->xfr_acl != NULL) {
dns_acl_detach(&zone->xfr_acl);
}
if (dns_name_dynamic(&zone->origin)) {
dns_name_free(&zone->origin, zone->mctx);
}
if (zone->strnamerd != NULL) {
isc_mem_free(zone->mctx, zone->strnamerd);
}
if (zone->strname != NULL) {
isc_mem_free(zone->mctx, zone->strname);
}
if (zone->strrdclass != NULL) {
isc_mem_free(zone->mctx, zone->strrdclass);
}
if (zone->strviewname != NULL) {
isc_mem_free(zone->mctx, zone->strviewname);
}
if (zone->ssutable != NULL) {
dns_ssutable_detach(&zone->ssutable);
}
/* last stuff */
ZONEDB_DESTROYLOCK(&zone->dblock);
DESTROYLOCK(&zone->lock);
isc_refcount_destroy(&zone->erefs);
zone->magic = 0;
mctx = zone->mctx;
isc_mem_put(mctx, zone, sizeof(*zone));
isc_mem_detach(&mctx);
}
/*
* Returns true iff this the signed side of an inline-signing zone.
* Caller should hold zone lock.
*/
static inline bool
inline_secure(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
if (zone->raw != NULL)
return (true);
return (false);
}
/*
* Returns true iff this the unsigned side of an inline-signing zone
* Caller should hold zone lock.
*/
static inline bool
inline_raw(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
if (zone->secure != NULL)
return (true);
return (false);
}
/*
* Single shot.
*/
void
dns_zone_setclass(dns_zone_t *zone, dns_rdataclass_t rdclass) {
char namebuf[1024];
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(rdclass != dns_rdataclass_none);
/*
* Test and set.
*/
LOCK_ZONE(zone);
INSIST(zone != zone->raw);
REQUIRE(zone->rdclass == dns_rdataclass_none ||
zone->rdclass == rdclass);
zone->rdclass = rdclass;
if (zone->strnamerd != NULL)
isc_mem_free(zone->mctx, zone->strnamerd);
if (zone->strrdclass != NULL)
isc_mem_free(zone->mctx, zone->strrdclass);
zone_namerd_tostr(zone, namebuf, sizeof namebuf);
zone->strnamerd = isc_mem_strdup(zone->mctx, namebuf);
zone_rdclass_tostr(zone, namebuf, sizeof namebuf);
zone->strrdclass = isc_mem_strdup(zone->mctx, namebuf);
if (inline_secure(zone))
dns_zone_setclass(zone->raw, rdclass);
UNLOCK_ZONE(zone);
}
dns_rdataclass_t
dns_zone_getclass(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->rdclass);
}
void
dns_zone_setnotifytype(dns_zone_t *zone, dns_notifytype_t notifytype) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->notifytype = notifytype;
UNLOCK_ZONE(zone);
}
isc_result_t
dns_zone_getserial2(dns_zone_t *zone, uint32_t *serialp) {
isc_result_t result;
unsigned int soacount;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(serialp != NULL);
LOCK_ZONE(zone);
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL) {
result = zone_get_from_db(zone, zone->db, NULL, &soacount,
serialp, NULL, NULL, NULL, NULL,
NULL);
if (result == ISC_R_SUCCESS && soacount == 0)
result = ISC_R_FAILURE;
} else
result = DNS_R_NOTLOADED;
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
UNLOCK_ZONE(zone);
return (result);
}
uint32_t
dns_zone_getserial(dns_zone_t *zone) {
isc_result_t result;
uint32_t serial;
result = dns_zone_getserial2(zone, &serial);
if (result != ISC_R_SUCCESS)
serial = 0; /* XXX: not really correct, but no other choice */
return (serial);
}
/*
* Single shot.
*/
void
dns_zone_settype(dns_zone_t *zone, dns_zonetype_t type) {
char namebuf[1024];
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(type != dns_zone_none);
/*
* Test and set.
*/
LOCK_ZONE(zone);
REQUIRE(zone->type == dns_zone_none || zone->type == type);
zone->type = type;
if (zone->strnamerd != NULL)
isc_mem_free(zone->mctx, zone->strnamerd);
zone_namerd_tostr(zone, namebuf, sizeof namebuf);
zone->strnamerd = isc_mem_strdup(zone->mctx, namebuf);
UNLOCK_ZONE(zone);
}
static void
zone_freedbargs(dns_zone_t *zone) {
unsigned int i;
/* Free the old database argument list. */
if (zone->db_argv != NULL) {
for (i = 0; i < zone->db_argc; i++)
isc_mem_free(zone->mctx, zone->db_argv[i]);
isc_mem_put(zone->mctx, zone->db_argv,
zone->db_argc * sizeof(*zone->db_argv));
}
zone->db_argc = 0;
zone->db_argv = NULL;
}
isc_result_t
dns_zone_getdbtype(dns_zone_t *zone, char ***argv, isc_mem_t *mctx) {
size_t size = 0;
unsigned int i;
isc_result_t result = ISC_R_SUCCESS;
void *mem;
char **tmp, *tmp2, *base;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(argv != NULL && *argv == NULL);
LOCK_ZONE(zone);
size = (zone->db_argc + 1) * sizeof(char *);
for (i = 0; i < zone->db_argc; i++)
size += strlen(zone->db_argv[i]) + 1;
mem = isc_mem_allocate(mctx, size);
if (mem != NULL) {
tmp = mem;
tmp2 = mem;
base = mem;
tmp2 += (zone->db_argc + 1) * sizeof(char *);
for (i = 0; i < zone->db_argc; i++) {
*tmp++ = tmp2;
strlcpy(tmp2, zone->db_argv[i], size - (tmp2 - base));
tmp2 += strlen(tmp2) + 1;
}
*tmp = NULL;
} else
result = ISC_R_NOMEMORY;
UNLOCK_ZONE(zone);
*argv = mem;
return (result);
}
isc_result_t
dns_zone_setdbtype(dns_zone_t *zone,
unsigned int dbargc, const char * const *dbargv)
{
isc_result_t result = ISC_R_SUCCESS;
char **argv = NULL;
unsigned int i;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(dbargc >= 1);
REQUIRE(dbargv != NULL);
LOCK_ZONE(zone);
/* Set up a new database argument list. */
argv = isc_mem_get(zone->mctx, dbargc * sizeof(*argv));
if (argv == NULL) {
goto nomem;
}
for (i = 0; i < dbargc; i++) {
argv[i] = NULL;
}
for (i = 0; i < dbargc; i++) {
argv[i] = isc_mem_strdup(zone->mctx, dbargv[i]);
if (argv[i] == NULL)
goto nomem;
}
/* Free the old list. */
zone_freedbargs(zone);
zone->db_argc = dbargc;
zone->db_argv = argv;
result = ISC_R_SUCCESS;
goto unlock;
nomem:
if (argv != NULL) {
for (i = 0; i < dbargc; i++) {
if (argv[i] != NULL) {
isc_mem_free(zone->mctx, argv[i]);
}
}
isc_mem_put(zone->mctx, argv, dbargc * sizeof(*argv));
}
result = ISC_R_NOMEMORY;
unlock:
UNLOCK_ZONE(zone);
return (result);
}
static void
dns_zone_setview_helper(dns_zone_t *zone, dns_view_t *view) {
char namebuf[1024];
if (zone->prev_view == NULL && zone->view != NULL) {
dns_view_weakattach(zone->view, &zone->prev_view);
}
INSIST(zone != zone->raw);
if (zone->view != NULL) {
dns_view_weakdetach(&zone->view);
}
dns_view_weakattach(view, &zone->view);
if (zone->strviewname != NULL) {
isc_mem_free(zone->mctx, zone->strviewname);
}
if (zone->strnamerd != NULL) {
isc_mem_free(zone->mctx, zone->strnamerd);
}
zone_namerd_tostr(zone, namebuf, sizeof namebuf);
zone->strnamerd = isc_mem_strdup(zone->mctx, namebuf);
zone_viewname_tostr(zone, namebuf, sizeof namebuf);
zone->strviewname = isc_mem_strdup(zone->mctx, namebuf);
if (inline_secure(zone)) {
dns_zone_setview(zone->raw, view);
}
}
void
dns_zone_setview(dns_zone_t *zone, dns_view_t *view) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
dns_zone_setview_helper(zone, view);
UNLOCK_ZONE(zone);
}
dns_view_t *
dns_zone_getview(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->view);
}
void
dns_zone_setviewcommit(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->prev_view != NULL)
dns_view_weakdetach(&zone->prev_view);
UNLOCK_ZONE(zone);
}
void
dns_zone_setviewrevert(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->prev_view != NULL) {
dns_zone_setview_helper(zone, zone->prev_view);
dns_view_weakdetach(&zone->prev_view);
}
UNLOCK_ZONE(zone);
}
isc_result_t
dns_zone_setorigin(dns_zone_t *zone, const dns_name_t *origin) {
isc_result_t result;
char namebuf[1024];
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(origin != NULL);
LOCK_ZONE(zone);
INSIST(zone != zone->raw);
if (dns_name_dynamic(&zone->origin)) {
dns_name_free(&zone->origin, zone->mctx);
dns_name_init(&zone->origin, NULL);
}
result = dns_name_dup(origin, zone->mctx, &zone->origin);
if (zone->strnamerd != NULL)
isc_mem_free(zone->mctx, zone->strnamerd);
if (zone->strname != NULL)
isc_mem_free(zone->mctx, zone->strname);
zone_namerd_tostr(zone, namebuf, sizeof namebuf);
zone->strnamerd = isc_mem_strdup(zone->mctx, namebuf);
zone_name_tostr(zone, namebuf, sizeof namebuf);
zone->strname = isc_mem_strdup(zone->mctx, namebuf);
if (result == ISC_R_SUCCESS && inline_secure(zone))
result = dns_zone_setorigin(zone->raw, origin);
UNLOCK_ZONE(zone);
return (result);
}
void
dns_zone_setacache(dns_zone_t *zone, dns_acache_t *acache) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(acache != NULL);
LOCK_ZONE(zone);
if (zone->acache != NULL)
dns_acache_detach(&zone->acache);
dns_acache_attach(acache, &zone->acache);
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL) {
isc_result_t result;
/*
* If the zone reuses an existing DB, the DB needs to be
* set in the acache explicitly. We can safely ignore the
* case where the DB is already set. If other error happens,
* the acache will not work effectively.
*/
result = dns_acache_setdb(acache, zone->db);
if (result != ISC_R_SUCCESS && result != ISC_R_EXISTS) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"dns_acache_setdb() failed: %s",
isc_result_totext(result));
}
}
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
UNLOCK_ZONE(zone);
}
static isc_result_t
dns_zone_setstring(dns_zone_t *zone, char **field, const char *value) {
char *copy;
if (value != NULL) {
copy = isc_mem_strdup(zone->mctx, value);
if (copy == NULL)
return (ISC_R_NOMEMORY);
} else {
copy = NULL;
}
if (*field != NULL)
isc_mem_free(zone->mctx, *field);
*field = copy;
return (ISC_R_SUCCESS);
}
isc_result_t
dns_zone_setfile(dns_zone_t *zone, const char *file) {
return (dns_zone_setfile3(zone, file, dns_masterformat_text,
&dns_master_style_default));
}
isc_result_t
dns_zone_setfile2(dns_zone_t *zone, const char *file,
dns_masterformat_t format)
{
return (dns_zone_setfile3(zone, file, format,
&dns_master_style_default));
}
isc_result_t
dns_zone_setfile3(dns_zone_t *zone, const char *file,
dns_masterformat_t format,
const dns_master_style_t *style)
{
isc_result_t result = ISC_R_SUCCESS;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
result = dns_zone_setstring(zone, &zone->masterfile, file);
if (result == ISC_R_SUCCESS) {
zone->masterformat = format;
if (format == dns_masterformat_text)
zone->masterstyle = style;
result = default_journal(zone);
}
UNLOCK_ZONE(zone);
return (result);
}
const char *
dns_zone_getfile(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->masterfile);
}
dns_ttl_t
dns_zone_getmaxttl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->maxttl);
}
void
dns_zone_setmaxttl(dns_zone_t *zone, dns_ttl_t maxttl) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (maxttl != 0)
zone->options2 |= DNS_ZONEOPT2_CHECKTTL;
else
zone->options2 &= ~DNS_ZONEOPT2_CHECKTTL;
zone->maxttl = maxttl;
UNLOCK_ZONE(zone);
return;
}
static isc_result_t
default_journal(dns_zone_t *zone) {
isc_result_t result;
char *journal;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(LOCKED_ZONE(zone));
if (zone->masterfile != NULL) {
/* Calculate string length including '\0'. */
int len = strlen(zone->masterfile) + sizeof(".jnl");
journal = isc_mem_allocate(zone->mctx, len);
if (journal == NULL)
return (ISC_R_NOMEMORY);
strlcpy(journal, zone->masterfile, len);
strlcat(journal, ".jnl", len);
} else {
journal = NULL;
}
result = dns_zone_setstring(zone, &zone->journal, journal);
if (journal != NULL)
isc_mem_free(zone->mctx, journal);
return (result);
}
isc_result_t
dns_zone_setjournal(dns_zone_t *zone, const char *myjournal) {
isc_result_t result = ISC_R_SUCCESS;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
result = dns_zone_setstring(zone, &zone->journal, myjournal);
UNLOCK_ZONE(zone);
return (result);
}
char *
dns_zone_getjournal(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->journal);
}
/*
* Return true iff the zone is "dynamic", in the sense that the zone's
* master file (if any) is written by the server, rather than being
* updated manually and read by the server.
*
* This is true for slave zones, stub zones, key zones, and zones that
* allow dynamic updates either by having an update policy ("ssutable")
* or an "allow-update" ACL with a value other than exactly "{ none; }".
*/
bool
dns_zone_isdynamic(dns_zone_t *zone, bool ignore_freeze) {
REQUIRE(DNS_ZONE_VALID(zone));
if (zone->type == dns_zone_slave || zone->type == dns_zone_stub ||
zone->type == dns_zone_key ||
(zone->type == dns_zone_redirect && zone->masters != NULL))
return (true);
/* Inline zones are always dynamic. */
if (zone->type == dns_zone_master && zone->raw != NULL)
return (true);
/* If !ignore_freeze, we need check whether updates are disabled. */
if (zone->type == dns_zone_master &&
(!zone->update_disabled || ignore_freeze) &&
((zone->ssutable != NULL) ||
(zone->update_acl != NULL && !dns_acl_isnone(zone->update_acl))))
return (true);
return (false);
}
/*
* Set the response policy index and information for a zone.
*/
isc_result_t
dns_zone_rpz_enable(dns_zone_t *zone, dns_rpz_zones_t *rpzs,
dns_rpz_num_t rpz_num)
{
/*
* Only RBTDB zones can be used for response policy zones,
* because only they have the code to create the summary data.
* Only zones that are loaded instead of mmap()ed create the
* summary data and so can be policy zones.
*/
if (strcmp(zone->db_argv[0], "rbt") != 0 &&
strcmp(zone->db_argv[0], "rbt64") != 0)
return (ISC_R_NOTIMPLEMENTED);
if (zone->masterformat == dns_masterformat_map)
return (ISC_R_NOTIMPLEMENTED);
/*
* This must happen only once or be redundant.
*/
LOCK_ZONE(zone);
if (zone->rpzs != NULL) {
REQUIRE(zone->rpzs == rpzs && zone->rpz_num == rpz_num);
} else {
REQUIRE(zone->rpz_num == DNS_RPZ_INVALID_NUM);
dns_rpz_attach_rpzs(rpzs, &zone->rpzs);
zone->rpz_num = rpz_num;
}
rpzs->defined |= DNS_RPZ_ZBIT(rpz_num);
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
dns_rpz_num_t
dns_zone_get_rpz_num(dns_zone_t *zone) {
return (zone->rpz_num);
}
/*
* If a zone is a response policy zone, mark its new database.
*/
void
dns_zone_rpz_enable_db(dns_zone_t *zone, dns_db_t *db) {
if (zone->rpz_num != DNS_RPZ_INVALID_NUM) {
REQUIRE(zone->rpzs != NULL);
dns_db_rpz_attach(db, zone->rpzs, zone->rpz_num);
}
}
void
dns_zone_catz_enable(dns_zone_t *zone, dns_catz_zones_t *catzs) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(catzs != NULL);
LOCK_ZONE(zone);
INSIST(zone->catzs == NULL || zone->catzs == catzs);
dns_catz_catzs_set_view(catzs, zone->view);
if (zone->catzs == NULL)
dns_catz_catzs_attach(catzs, &zone->catzs);
UNLOCK_ZONE(zone);
}
/*
* If a zone is a catalog zone, attach it to update notification in database.
*/
void
dns_zone_catz_enable_db(dns_zone_t *zone, dns_db_t *db) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(db != NULL);
if (zone->catzs != NULL) {
dns_db_updatenotify_register(db, dns_catz_dbupdate_callback,
zone->catzs);
}
}
/*
* Set catalog zone ownership of the zone
*/
void
dns_zone_set_parentcatz(dns_zone_t *zone, dns_catz_zone_t *catz) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(catz != NULL);
LOCK_ZONE(zone);
INSIST(zone->parentcatz == NULL || zone->parentcatz == catz);
zone->parentcatz = catz;
UNLOCK_ZONE(zone);
}
dns_catz_zone_t *
dns_zone_get_parentcatz(const dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->parentcatz);
}
static bool
zone_touched(dns_zone_t *zone) {
isc_result_t result;
isc_time_t modtime;
dns_include_t *include;
REQUIRE(DNS_ZONE_VALID(zone));
result = isc_file_getmodtime(zone->masterfile, &modtime);
if (result != ISC_R_SUCCESS ||
isc_time_compare(&modtime, &zone->loadtime) > 0)
return (true);
for (include = ISC_LIST_HEAD(zone->includes);
include != NULL;
include = ISC_LIST_NEXT(include, link))
{
result = isc_file_getmodtime(include->name, &modtime);
if (result != ISC_R_SUCCESS ||
isc_time_compare(&modtime, &include->filetime) > 0)
return (true);
}
return (false);
}
/*
* Note: when dealing with inline-signed zones, external callers will always
* call zone_load() for the secure zone; zone_load() calls itself recursively
* in order to load the raw zone.
*/
static isc_result_t
zone_load(dns_zone_t *zone, unsigned int flags, bool locked) {
isc_result_t result;
isc_time_t now;
isc_time_t loadtime;
dns_db_t *db = NULL;
bool rbt, hasraw;
REQUIRE(DNS_ZONE_VALID(zone));
if (!locked)
LOCK_ZONE(zone);
INSIST(zone != zone->raw);
hasraw = inline_secure(zone);
if (hasraw) {
/*
* We are trying to load an inline-signed zone. First call
* self recursively to try loading the raw version of the zone.
* Assuming the raw zone file is readable, there are two
* possibilities:
*
* a) the raw zone was not yet loaded and thus it will be
* loaded now, synchronously; if this succeeds, a
* subsequent attempt to load the signed zone file will
* take place and thus zone_postload() will be called
* twice: first for the raw zone and then for the secure
* zone; the latter call will take care of syncing the raw
* version with the secure version,
*
* b) the raw zone was already loaded and we are trying to
* reload it, which will happen asynchronously; this means
* zone_postload() will only be called for the raw zone
* because "result" returned by the zone_load() call below
* will not be ISC_R_SUCCESS but rather DNS_R_CONTINUE;
* zone_postload() called for the raw zone will take care
* of syncing the raw version with the secure version.
*/
result = zone_load(zone->raw, flags, false);
if (result != ISC_R_SUCCESS) {
if (!locked)
UNLOCK_ZONE(zone);
return(result);
}
LOCK_ZONE(zone->raw);
}
TIME_NOW(&now);
INSIST(zone->type != dns_zone_none);
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADING)) {
if ((flags & DNS_ZONELOADFLAG_THAW) != 0)
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_THAW);
result = DNS_R_CONTINUE;
goto cleanup;
}
INSIST(zone->db_argc >= 1);
rbt = strcmp(zone->db_argv[0], "rbt") == 0 ||
strcmp(zone->db_argv[0], "rbt64") == 0;
if (zone->db != NULL && zone->masterfile == NULL && rbt) {
/*
* The zone has no master file configured.
*/
result = ISC_R_SUCCESS;
goto cleanup;
}
if (zone->db != NULL && dns_zone_isdynamic(zone, false)) {
/*
* This is a slave, stub, or dynamically updated
* zone being reloaded. Do nothing - the database
* we already have is guaranteed to be up-to-date.
*/
if (zone->type == dns_zone_master && !hasraw)
result = DNS_R_DYNAMIC;
else
result = ISC_R_SUCCESS;
goto cleanup;
}
/*
* Store the current time before the zone is loaded, so that if the
* file changes between the time of the load and the time that
* zone->loadtime is set, then the file will still be reloaded
* the next time dns_zone_load is called.
*/
TIME_NOW(&loadtime);
/*
* Don't do the load if the file that stores the zone is older
* than the last time the zone was loaded. If the zone has not
* been loaded yet, zone->loadtime will be the epoch.
*/
if (zone->masterfile != NULL) {
isc_time_t filetime;
/*
* The file is already loaded. If we are just doing a
* "rndc reconfig", we are done.
*/
if (!isc_time_isepoch(&zone->loadtime) &&
(flags & DNS_ZONELOADFLAG_NOSTAT) != 0) {
result = ISC_R_SUCCESS;
goto cleanup;
}
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED) &&
!zone_touched(zone))
{
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"skipping load: master file "
"older than last load");
result = DNS_R_UPTODATE;
goto cleanup;
}
/*
* If the file modification time is in the past
* set loadtime to that value.
*/
result = isc_file_getmodtime(zone->masterfile, &filetime);
if (result == ISC_R_SUCCESS &&
isc_time_compare(&loadtime, &filetime) > 0)
loadtime = filetime;
}
/*
* Built in zones (with the exception of empty zones) don't need
* to be reloaded.
*/
if (zone->type == dns_zone_master &&
strcmp(zone->db_argv[0], "_builtin") == 0 &&
(zone->db_argc < 2 || strcmp(zone->db_argv[1], "empty") != 0) &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED)) {
result = ISC_R_SUCCESS;
goto cleanup;
}
/*
* Zones associated with a DLZ don't need to be loaded either,
* but we need to associate the database with the zone object.
*/
if (strcmp(zone->db_argv[0], "dlz") == 0) {
dns_dlzdb_t *dlzdb;
dns_dlzfindzone_t findzone;
for (dlzdb = ISC_LIST_HEAD(zone->view->dlz_unsearched);
dlzdb != NULL;
dlzdb = ISC_LIST_NEXT(dlzdb, link))
{
INSIST(DNS_DLZ_VALID(dlzdb));
if (strcmp(zone->db_argv[1], dlzdb->dlzname) == 0)
break;
}
if (dlzdb == NULL) {
dns_zone_log(zone, ISC_LOG_ERROR,
"DLZ %s does not exist or is set "
"to 'search yes;'", zone->db_argv[1]);
result = ISC_R_NOTFOUND;
goto cleanup;
}
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_write);
/* ask SDLZ driver if the zone is supported */
findzone = dlzdb->implementation->methods->findzone;
result = (*findzone)(dlzdb->implementation->driverarg,
dlzdb->dbdata, dlzdb->mctx,
zone->view->rdclass, &zone->origin,
NULL, NULL, &db);
if (result != ISC_R_NOTFOUND) {
if (zone->db != NULL)
zone_detachdb(zone);
zone_attachdb(zone, db);
dns_db_detach(&db);
result = ISC_R_SUCCESS;
}
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_write);
if (result == ISC_R_SUCCESS) {
if (dlzdb->configure_callback == NULL)
goto cleanup;
result = (*dlzdb->configure_callback)(zone->view,
dlzdb, zone);
if (result != ISC_R_SUCCESS)
dns_zone_log(zone, ISC_LOG_ERROR,
"DLZ configuration callback: %s",
isc_result_totext(result));
}
goto cleanup;
}
if ((zone->type == dns_zone_slave || zone->type == dns_zone_stub ||
(zone->type == dns_zone_redirect && zone->masters != NULL)) &&
rbt) {
if (zone->masterfile == NULL ||
!isc_file_exists(zone->masterfile)) {
if (zone->masterfile != NULL) {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"no master file");
}
zone->refreshtime = now;
if (zone->task != NULL)
zone_settimer(zone, &now);
result = ISC_R_SUCCESS;
goto cleanup;
}
}
dns_zone_log(zone, ISC_LOG_DEBUG(1), "starting load");
result = dns_db_create(zone->mctx, zone->db_argv[0],
&zone->origin, (zone->type == dns_zone_stub) ?
dns_dbtype_stub : dns_dbtype_zone,
zone->rdclass,
zone->db_argc - 1, zone->db_argv + 1,
&db);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"loading zone: creating database: %s",
isc_result_totext(result));
goto cleanup;
}
dns_db_settask(db, zone->task);
if (! dns_db_ispersistent(db)) {
if (zone->masterfile != NULL) {
result = zone_startload(db, zone, loadtime);
} else {
result = DNS_R_NOMASTERFILE;
if (zone->type == dns_zone_master ||
(zone->type == dns_zone_redirect &&
zone->masters == NULL)) {
dns_zone_log(zone, ISC_LOG_ERROR,
"loading zone: "
"no master file configured");
goto cleanup;
}
dns_zone_log(zone, ISC_LOG_INFO, "loading zone: "
"no master file configured: continuing");
}
}
if (result == DNS_R_CONTINUE) {
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_LOADING);
if ((flags & DNS_ZONELOADFLAG_THAW) != 0)
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_THAW);
goto cleanup;
}
result = zone_postload(zone, db, loadtime, result);
cleanup:
if (hasraw)
UNLOCK_ZONE(zone->raw);
if (!locked)
UNLOCK_ZONE(zone);
if (db != NULL)
dns_db_detach(&db);
return (result);
}
isc_result_t
dns_zone_load(dns_zone_t *zone) {
return (zone_load(zone, 0, false));
}
isc_result_t
dns_zone_loadnew(dns_zone_t *zone) {
return (zone_load(zone, DNS_ZONELOADFLAG_NOSTAT, false));
}
static void
zone_asyncload(isc_task_t *task, isc_event_t *event) {
dns_asyncload_t *asl = event->ev_arg;
dns_zone_t *zone = asl->zone;
isc_result_t result;
UNUSED(task);
REQUIRE(DNS_ZONE_VALID(zone));
isc_event_free(&event);
LOCK_ZONE(zone);
result = zone_load(zone, asl->newonly ? DNS_ZONELOADFLAG_NOSTAT : 0,
true);
if (result != DNS_R_CONTINUE) {
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_LOADPENDING);
}
UNLOCK_ZONE(zone);
/* Inform the zone table we've finished loading */
if (asl->loaded != NULL)
(asl->loaded)(asl->loaded_arg, zone, task);
isc_mem_put(zone->mctx, asl, sizeof (*asl));
dns_zone_idetach(&zone);
}
isc_result_t
dns_zone_asyncload(dns_zone_t *zone, dns_zt_zoneloaded_t done, void *arg) {
return (dns_zone_asyncload2(zone, done, arg, false));
}
isc_result_t
dns_zone_asyncload2(dns_zone_t *zone, dns_zt_zoneloaded_t done, void * arg,
bool newonly)
{
isc_event_t *e;
dns_asyncload_t *asl = NULL;
isc_result_t result = ISC_R_SUCCESS;
REQUIRE(DNS_ZONE_VALID(zone));
if (zone->zmgr == NULL)
return (ISC_R_FAILURE);
/* If we already have a load pending, stop now */
LOCK_ZONE(zone);
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADPENDING)) {
UNLOCK_ZONE(zone);
return (ISC_R_ALREADYRUNNING);
}
asl = isc_mem_get(zone->mctx, sizeof (*asl));
if (asl == NULL)
CHECK(ISC_R_NOMEMORY);
asl->zone = NULL;
asl->loaded = done;
asl->loaded_arg = arg;
asl->newonly = newonly;
e = isc_event_allocate(zone->zmgr->mctx, zone->zmgr,
DNS_EVENT_ZONELOAD,
zone_asyncload, asl,
sizeof(isc_event_t));
if (e == NULL)
CHECK(ISC_R_NOMEMORY);
zone_iattach(zone, &asl->zone);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_LOADPENDING);
isc_task_send(zone->loadtask, &e);
UNLOCK_ZONE(zone);
return (result);
failure:
if (asl != NULL)
isc_mem_put(zone->mctx, asl, sizeof (*asl));
UNLOCK_ZONE(zone);
return (result);
}
bool
dns__zone_loadpending(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADPENDING));
}
isc_result_t
dns_zone_loadandthaw(dns_zone_t *zone) {
isc_result_t result;
if (inline_raw(zone))
result = zone_load(zone->secure, DNS_ZONELOADFLAG_THAW,
false);
else
result = zone_load(zone, DNS_ZONELOADFLAG_THAW, false);
switch (result) {
case DNS_R_CONTINUE:
/* Deferred thaw. */
break;
case DNS_R_UPTODATE:
case ISC_R_SUCCESS:
case DNS_R_SEENINCLUDE:
zone->update_disabled = false;
break;
case DNS_R_NOMASTERFILE:
zone->update_disabled = false;
break;
default:
/* Error, remain in disabled state. */
break;
}
return (result);
}
static unsigned int
get_master_options(dns_zone_t *zone) {
unsigned int options;
options = DNS_MASTER_ZONE | DNS_MASTER_RESIGN;
if (zone->type == dns_zone_slave ||
(zone->type == dns_zone_redirect && zone->masters == NULL))
options |= DNS_MASTER_SLAVE;
if (zone->type == dns_zone_key)
options |= DNS_MASTER_KEY;
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKNS))
options |= DNS_MASTER_CHECKNS;
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_FATALNS))
options |= DNS_MASTER_FATALNS;
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKNAMES))
options |= DNS_MASTER_CHECKNAMES;
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKNAMESFAIL))
options |= DNS_MASTER_CHECKNAMESFAIL;
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKMX))
options |= DNS_MASTER_CHECKMX;
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKMXFAIL))
options |= DNS_MASTER_CHECKMXFAIL;
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKWILDCARD))
options |= DNS_MASTER_CHECKWILDCARD;
if (DNS_ZONE_OPTION2(zone, DNS_ZONEOPT2_CHECKTTL))
options |= DNS_MASTER_CHECKTTL;
return (options);
}
static void
zone_registerinclude(const char *filename, void *arg) {
isc_result_t result;
dns_zone_t *zone = (dns_zone_t *) arg;
dns_include_t *inc = NULL;
REQUIRE(DNS_ZONE_VALID(zone));
if (filename == NULL)
return;
/*
* Suppress duplicates.
*/
for (inc = ISC_LIST_HEAD(zone->newincludes);
inc != NULL;
inc = ISC_LIST_NEXT(inc, link))
if (strcmp(filename, inc->name) == 0)
return;
inc = isc_mem_get(zone->mctx, sizeof(dns_include_t));
if (inc == NULL)
return;
inc->name = isc_mem_strdup(zone->mctx, filename);
if (inc->name == NULL) {
isc_mem_put(zone->mctx, inc, sizeof(dns_include_t));
return;
}
ISC_LINK_INIT(inc, link);
result = isc_file_getmodtime(filename, &inc->filetime);
if (result != ISC_R_SUCCESS)
isc_time_settoepoch(&inc->filetime);
ISC_LIST_APPEND(zone->newincludes, inc, link);
}
static void
zone_gotreadhandle(isc_task_t *task, isc_event_t *event) {
dns_load_t *load = event->ev_arg;
isc_result_t result = ISC_R_SUCCESS;
unsigned int options;
REQUIRE(DNS_LOAD_VALID(load));
if ((event->ev_attributes & ISC_EVENTATTR_CANCELED) != 0)
result = ISC_R_CANCELED;
isc_event_free(&event);
if (result == ISC_R_CANCELED)
goto fail;
options = get_master_options(load->zone);
result = dns_master_loadfileinc5(load->zone->masterfile,
dns_db_origin(load->db),
dns_db_origin(load->db),
load->zone->rdclass, options, 0,
&load->callbacks, task,
zone_loaddone, load,
&load->zone->lctx,
zone_registerinclude,
load->zone, load->zone->mctx,
load->zone->masterformat,
load->zone->maxttl);
if (result != ISC_R_SUCCESS && result != DNS_R_CONTINUE &&
result != DNS_R_SEENINCLUDE)
goto fail;
return;
fail:
zone_loaddone(load, result);
}
static void
get_raw_serial(dns_zone_t *raw, dns_masterrawheader_t *rawdata) {
isc_result_t result;
unsigned int soacount;
LOCK(&raw->lock);
if (raw->db != NULL) {
result = zone_get_from_db(raw, raw->db, NULL, &soacount,
&rawdata->sourceserial,
NULL, NULL, NULL, NULL,
NULL);
if (result == ISC_R_SUCCESS && soacount > 0U)
rawdata->flags |= DNS_MASTERRAW_SOURCESERIALSET;
}
UNLOCK(&raw->lock);
}
static void
zone_gotwritehandle(isc_task_t *task, isc_event_t *event) {
const char me[] = "zone_gotwritehandle";
dns_zone_t *zone = event->ev_arg;
isc_result_t result = ISC_R_SUCCESS;
dns_dbversion_t *version = NULL;
dns_masterrawheader_t rawdata;
REQUIRE(DNS_ZONE_VALID(zone));
INSIST(task == zone->task);
ENTER;
if ((event->ev_attributes & ISC_EVENTATTR_CANCELED) != 0)
result = ISC_R_CANCELED;
isc_event_free(&event);
if (result == ISC_R_CANCELED)
goto fail;
LOCK_ZONE(zone);
INSIST(zone != zone->raw);
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL) {
const dns_master_style_t *output_style;
dns_db_currentversion(zone->db, &version);
dns_master_initrawheader(&rawdata);
if (inline_secure(zone))
get_raw_serial(zone->raw, &rawdata);
if (zone->type == dns_zone_key)
output_style = &dns_master_style_keyzone;
else if (zone->masterstyle != NULL)
output_style = zone->masterstyle;
else
output_style = &dns_master_style_default;
result = dns_master_dumpinc3(zone->mctx, zone->db, version,
output_style, zone->masterfile,
zone->task, dump_done, zone,
&zone->dctx, zone->masterformat,
&rawdata);
dns_db_closeversion(zone->db, &version, false);
} else
result = ISC_R_CANCELED;
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
UNLOCK_ZONE(zone);
if (result != DNS_R_CONTINUE)
goto fail;
return;
fail:
dump_done(zone, result);
}
/*
* Save the raw serial number for inline-signing zones.
* (XXX: Other information from the header will be used
* for other purposes in the future, but for now this is
* all we're interested in.)
*/
static void
zone_setrawdata(dns_zone_t *zone, dns_masterrawheader_t *header) {
if ((header->flags & DNS_MASTERRAW_SOURCESERIALSET) == 0)
return;
zone->sourceserial = header->sourceserial;
zone->sourceserialset = true;
}
void
dns_zone_setrawdata(dns_zone_t *zone, dns_masterrawheader_t *header) {
if (zone == NULL)
return;
LOCK_ZONE(zone);
zone_setrawdata(zone, header);
UNLOCK_ZONE(zone);
}
static isc_result_t
zone_startload(dns_db_t *db, dns_zone_t *zone, isc_time_t loadtime) {
dns_load_t *load;
isc_result_t result;
isc_result_t tresult;
unsigned int options;
dns_zone_rpz_enable_db(zone, db);
dns_zone_catz_enable_db(zone, db);
options = get_master_options(zone);
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_MANYERRORS))
options |= DNS_MASTER_MANYERRORS;
if (zone->zmgr != NULL && zone->db != NULL && zone->loadtask != NULL) {
load = isc_mem_get(zone->mctx, sizeof(*load));
if (load == NULL)
return (ISC_R_NOMEMORY);
load->mctx = NULL;
load->zone = NULL;
load->db = NULL;
load->loadtime = loadtime;
load->magic = LOAD_MAGIC;
isc_mem_attach(zone->mctx, &load->mctx);
zone_iattach(zone, &load->zone);
dns_db_attach(db, &load->db);
dns_rdatacallbacks_init(&load->callbacks);
load->callbacks.rawdata = zone_setrawdata;
zone_iattach(zone, &load->callbacks.zone);
result = dns_db_beginload(db, &load->callbacks);
if (result != ISC_R_SUCCESS)
goto cleanup;
result = zonemgr_getio(zone->zmgr, true, zone->loadtask,
zone_gotreadhandle, load,
&zone->readio);
if (result != ISC_R_SUCCESS) {
/*
* We can't report multiple errors so ignore
* the result of dns_db_endload().
*/
(void)dns_db_endload(load->db, &load->callbacks);
goto cleanup;
} else
result = DNS_R_CONTINUE;
} else {
dns_rdatacallbacks_t callbacks;
dns_rdatacallbacks_init(&callbacks);
callbacks.rawdata = zone_setrawdata;
zone_iattach(zone, &callbacks.zone);
result = dns_db_beginload(db, &callbacks);
if (result != ISC_R_SUCCESS) {
zone_idetach(&callbacks.zone);
return (result);
}
result = dns_master_loadfile5(zone->masterfile,
&zone->origin, &zone->origin,
zone->rdclass, options, 0,
&callbacks,
zone_registerinclude,
zone, zone->mctx,
zone->masterformat,
zone->maxttl);
tresult = dns_db_endload(db, &callbacks);
if (result == ISC_R_SUCCESS)
result = tresult;
zone_idetach(&callbacks.zone);
}
return (result);
cleanup:
load->magic = 0;
dns_db_detach(&load->db);
zone_idetach(&load->zone);
zone_idetach(&load->callbacks.zone);
isc_mem_detach(&load->mctx);
isc_mem_put(zone->mctx, load, sizeof(*load));
return (result);
}
static bool
zone_check_mx(dns_zone_t *zone, dns_db_t *db, dns_name_t *name,
dns_name_t *owner)
{
isc_result_t result;
char ownerbuf[DNS_NAME_FORMATSIZE];
char namebuf[DNS_NAME_FORMATSIZE];
char altbuf[DNS_NAME_FORMATSIZE];
dns_fixedname_t fixed;
dns_name_t *foundname;
int level;
/*
* "." means the services does not exist.
*/
if (dns_name_equal(name, dns_rootname))
return (true);
/*
* Outside of zone.
*/
if (!dns_name_issubdomain(name, &zone->origin)) {
if (zone->checkmx != NULL)
return ((zone->checkmx)(zone, name, owner));
return (true);
}
if (zone->type == dns_zone_master)
level = ISC_LOG_ERROR;
else
level = ISC_LOG_WARNING;
foundname = dns_fixedname_initname(&fixed);
result = dns_db_find(db, name, NULL, dns_rdatatype_a,
0, 0, NULL, foundname, NULL, NULL);
if (result == ISC_R_SUCCESS)
return (true);
if (result == DNS_R_NXRRSET) {
result = dns_db_find(db, name, NULL, dns_rdatatype_aaaa,
0, 0, NULL, foundname, NULL, NULL);
if (result == ISC_R_SUCCESS)
return (true);
}
dns_name_format(owner, ownerbuf, sizeof ownerbuf);
dns_name_format(name, namebuf, sizeof namebuf);
if (result == DNS_R_NXRRSET || result == DNS_R_NXDOMAIN ||
result == DNS_R_EMPTYNAME) {
if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKMXFAIL))
level = ISC_LOG_WARNING;
dns_zone_log(zone, level,
"%s/MX '%s' has no address records (A or AAAA)",
ownerbuf, namebuf);
return ((level == ISC_LOG_WARNING) ? true : false);
}
if (result == DNS_R_CNAME) {
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_WARNMXCNAME) ||
DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNOREMXCNAME))
level = ISC_LOG_WARNING;
if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNOREMXCNAME))
dns_zone_log(zone, level,
"%s/MX '%s' is a CNAME (illegal)",
ownerbuf, namebuf);
return ((level == ISC_LOG_WARNING) ? true : false);
}
if (result == DNS_R_DNAME) {
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_WARNMXCNAME) ||
DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNOREMXCNAME))
level = ISC_LOG_WARNING;
if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNOREMXCNAME)) {
dns_name_format(foundname, altbuf, sizeof altbuf);
dns_zone_log(zone, level, "%s/MX '%s' is below a DNAME"
" '%s' (illegal)", ownerbuf, namebuf,
altbuf);
}
return ((level == ISC_LOG_WARNING) ? true : false);
}
if (zone->checkmx != NULL && result == DNS_R_DELEGATION)
return ((zone->checkmx)(zone, name, owner));
return (true);
}
static bool
zone_check_srv(dns_zone_t *zone, dns_db_t *db, dns_name_t *name,
dns_name_t *owner)
{
isc_result_t result;
char ownerbuf[DNS_NAME_FORMATSIZE];
char namebuf[DNS_NAME_FORMATSIZE];
char altbuf[DNS_NAME_FORMATSIZE];
dns_fixedname_t fixed;
dns_name_t *foundname;
int level;
/*
* "." means the services does not exist.
*/
if (dns_name_equal(name, dns_rootname))
return (true);
/*
* Outside of zone.
*/
if (!dns_name_issubdomain(name, &zone->origin)) {
if (zone->checksrv != NULL)
return ((zone->checksrv)(zone, name, owner));
return (true);
}
if (zone->type == dns_zone_master)
level = ISC_LOG_ERROR;
else
level = ISC_LOG_WARNING;
foundname = dns_fixedname_initname(&fixed);
result = dns_db_find(db, name, NULL, dns_rdatatype_a,
0, 0, NULL, foundname, NULL, NULL);
if (result == ISC_R_SUCCESS)
return (true);
if (result == DNS_R_NXRRSET) {
result = dns_db_find(db, name, NULL, dns_rdatatype_aaaa,
0, 0, NULL, foundname, NULL, NULL);
if (result == ISC_R_SUCCESS)
return (true);
}
dns_name_format(owner, ownerbuf, sizeof ownerbuf);
dns_name_format(name, namebuf, sizeof namebuf);
if (result == DNS_R_NXRRSET || result == DNS_R_NXDOMAIN ||
result == DNS_R_EMPTYNAME) {
dns_zone_log(zone, level,
"%s/SRV '%s' has no address records (A or AAAA)",
ownerbuf, namebuf);
/* XXX950 make fatal for 9.5.0. */
return (true);
}
if (result == DNS_R_CNAME) {
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_WARNSRVCNAME) ||
DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNORESRVCNAME))
level = ISC_LOG_WARNING;
if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNORESRVCNAME))
dns_zone_log(zone, level,
"%s/SRV '%s' is a CNAME (illegal)",
ownerbuf, namebuf);
return ((level == ISC_LOG_WARNING) ? true : false);
}
if (result == DNS_R_DNAME) {
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_WARNSRVCNAME) ||
DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNORESRVCNAME))
level = ISC_LOG_WARNING;
if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNORESRVCNAME)) {
dns_name_format(foundname, altbuf, sizeof altbuf);
dns_zone_log(zone, level, "%s/SRV '%s' is below a "
"DNAME '%s' (illegal)", ownerbuf, namebuf,
altbuf);
}
return ((level == ISC_LOG_WARNING) ? true : false);
}
if (zone->checksrv != NULL && result == DNS_R_DELEGATION)
return ((zone->checksrv)(zone, name, owner));
return (true);
}
static bool
zone_check_glue(dns_zone_t *zone, dns_db_t *db, dns_name_t *name,
dns_name_t *owner)
{
bool answer = true;
isc_result_t result, tresult;
char ownerbuf[DNS_NAME_FORMATSIZE];
char namebuf[DNS_NAME_FORMATSIZE];
char altbuf[DNS_NAME_FORMATSIZE];
dns_fixedname_t fixed;
dns_name_t *foundname;
dns_rdataset_t a;
dns_rdataset_t aaaa;
int level;
/*
* Outside of zone.
*/
if (!dns_name_issubdomain(name, &zone->origin)) {
if (zone->checkns != NULL)
return ((zone->checkns)(zone, name, owner, NULL, NULL));
return (true);
}
if (zone->type == dns_zone_master)
level = ISC_LOG_ERROR;
else
level = ISC_LOG_WARNING;
foundname = dns_fixedname_initname(&fixed);
dns_rdataset_init(&a);
dns_rdataset_init(&aaaa);
/*
* Perform a regular lookup to catch DNAME records then look
* for glue.
*/
result = dns_db_find(db, name, NULL, dns_rdatatype_a,
0, 0, NULL, foundname, &a, NULL);
switch (result) {
case ISC_R_SUCCESS:
case DNS_R_DNAME:
case DNS_R_CNAME:
break;
default:
if (dns_rdataset_isassociated(&a))
dns_rdataset_disassociate(&a);
result = dns_db_find(db, name, NULL, dns_rdatatype_a,
DNS_DBFIND_GLUEOK, 0, NULL,
foundname, &a, NULL);
}
if (result == ISC_R_SUCCESS) {
dns_rdataset_disassociate(&a);
return (true);
} else if (result == DNS_R_DELEGATION)
dns_rdataset_disassociate(&a);
if (result == DNS_R_NXRRSET || result == DNS_R_DELEGATION ||
result == DNS_R_GLUE) {
tresult = dns_db_find(db, name, NULL, dns_rdatatype_aaaa,
DNS_DBFIND_GLUEOK, 0, NULL,
foundname, &aaaa, NULL);
if (tresult == ISC_R_SUCCESS) {
if (dns_rdataset_isassociated(&a))
dns_rdataset_disassociate(&a);
dns_rdataset_disassociate(&aaaa);
return (true);
}
if (tresult == DNS_R_DELEGATION || tresult == DNS_R_DNAME)
dns_rdataset_disassociate(&aaaa);
if (result == DNS_R_GLUE || tresult == DNS_R_GLUE) {
/*
* Check glue against child zone.
*/
if (zone->checkns != NULL)
answer = (zone->checkns)(zone, name, owner,
&a, &aaaa);
if (dns_rdataset_isassociated(&a))
dns_rdataset_disassociate(&a);
if (dns_rdataset_isassociated(&aaaa))
dns_rdataset_disassociate(&aaaa);
return (answer);
}
}
dns_name_format(owner, ownerbuf, sizeof ownerbuf);
dns_name_format(name, namebuf, sizeof namebuf);
if (result == DNS_R_NXRRSET || result == DNS_R_NXDOMAIN ||
result == DNS_R_EMPTYNAME || result == DNS_R_DELEGATION) {
const char *what;
bool required = false;
if (dns_name_issubdomain(name, owner)) {
what = "REQUIRED GLUE ";
required = true;
} else if (result == DNS_R_DELEGATION)
what = "SIBLING GLUE ";
else
what = "";
if (result != DNS_R_DELEGATION || required ||
DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKSIBLING)) {
dns_zone_log(zone, level, "%s/NS '%s' has no %s"
"address records (A or AAAA)",
ownerbuf, namebuf, what);
/*
* Log missing address record.
*/
if (result == DNS_R_DELEGATION && zone->checkns != NULL)
(void)(zone->checkns)(zone, name, owner,
&a, &aaaa);
/* XXX950 make fatal for 9.5.0. */
/* answer = false; */
}
} else if (result == DNS_R_CNAME) {
dns_zone_log(zone, level, "%s/NS '%s' is a CNAME (illegal)",
ownerbuf, namebuf);
/* XXX950 make fatal for 9.5.0. */
/* answer = false; */
} else if (result == DNS_R_DNAME) {
dns_name_format(foundname, altbuf, sizeof altbuf);
dns_zone_log(zone, level,
"%s/NS '%s' is below a DNAME '%s' (illegal)",
ownerbuf, namebuf, altbuf);
/* XXX950 make fatal for 9.5.0. */
/* answer = false; */
}
if (dns_rdataset_isassociated(&a))
dns_rdataset_disassociate(&a);
if (dns_rdataset_isassociated(&aaaa))
dns_rdataset_disassociate(&aaaa);
return (answer);
}
static bool
zone_rrset_check_dup(dns_zone_t *zone, dns_name_t *owner,
dns_rdataset_t *rdataset)
{
dns_rdataset_t tmprdataset;
isc_result_t result;
bool answer = true;
bool format = true;
int level = ISC_LOG_WARNING;
char ownerbuf[DNS_NAME_FORMATSIZE];
char typebuf[DNS_RDATATYPE_FORMATSIZE];
unsigned int count1 = 0;
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKDUPRRFAIL))
level = ISC_LOG_ERROR;
dns_rdataset_init(&tmprdataset);
for (result = dns_rdataset_first(rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(rdataset)) {
dns_rdata_t rdata1 = DNS_RDATA_INIT;
unsigned int count2 = 0;
count1++;
dns_rdataset_current(rdataset, &rdata1);
dns_rdataset_clone(rdataset, &tmprdataset);
for (result = dns_rdataset_first(&tmprdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&tmprdataset)) {
dns_rdata_t rdata2 = DNS_RDATA_INIT;
count2++;
if (count1 >= count2)
continue;
dns_rdataset_current(&tmprdataset, &rdata2);
if (dns_rdata_casecompare(&rdata1, &rdata2) == 0) {
if (format) {
dns_name_format(owner, ownerbuf,
sizeof ownerbuf);
dns_rdatatype_format(rdata1.type,
typebuf,
sizeof(typebuf));
format = false;
}
dns_zone_log(zone, level, "%s/%s has "
"semantically identical records",
ownerbuf, typebuf);
if (level == ISC_LOG_ERROR)
answer = false;
break;
}
}
dns_rdataset_disassociate(&tmprdataset);
if (!format)
break;
}
return (answer);
}
static bool
zone_check_dup(dns_zone_t *zone, dns_db_t *db) {
dns_dbiterator_t *dbiterator = NULL;
dns_dbnode_t *node = NULL;
dns_fixedname_t fixed;
dns_name_t *name;
dns_rdataset_t rdataset;
dns_rdatasetiter_t *rdsit = NULL;
bool ok = true;
isc_result_t result;
name = dns_fixedname_initname(&fixed);
dns_rdataset_init(&rdataset);
result = dns_db_createiterator(db, 0, &dbiterator);
if (result != ISC_R_SUCCESS)
return (true);
for (result = dns_dbiterator_first(dbiterator);
result == ISC_R_SUCCESS;
result = dns_dbiterator_next(dbiterator)) {
result = dns_dbiterator_current(dbiterator, &node, name);
if (result != ISC_R_SUCCESS)
continue;
result = dns_db_allrdatasets(db, node, NULL, 0, &rdsit);
if (result != ISC_R_SUCCESS)
continue;
for (result = dns_rdatasetiter_first(rdsit);
result == ISC_R_SUCCESS;
result = dns_rdatasetiter_next(rdsit)) {
dns_rdatasetiter_current(rdsit, &rdataset);
if (!zone_rrset_check_dup(zone, name, &rdataset))
ok = false;
dns_rdataset_disassociate(&rdataset);
}
dns_rdatasetiter_destroy(&rdsit);
dns_db_detachnode(db, &node);
}
if (node != NULL)
dns_db_detachnode(db, &node);
dns_dbiterator_destroy(&dbiterator);
return (ok);
}
static bool
isspf(const dns_rdata_t *rdata) {
char buf[1024];
const unsigned char *data = rdata->data;
unsigned int rdl = rdata->length, i = 0, tl, len;
while (rdl > 0U) {
len = tl = *data;
++data;
--rdl;
INSIST(tl <= rdl);
if (len > sizeof(buf) - i - 1)
len = sizeof(buf) - i - 1;
memmove(buf + i, data, len);
i += len;
data += tl;
rdl -= tl;
}
if (i < 6U)
return(false);
buf[i] = 0;
if (strncmp(buf, "v=spf1", 6) == 0 && (buf[6] == 0 || buf[6] == ' '))
return (true);
return (false);
}
static bool
integrity_checks(dns_zone_t *zone, dns_db_t *db) {
dns_dbiterator_t *dbiterator = NULL;
dns_dbnode_t *node = NULL;
dns_rdataset_t rdataset;
dns_fixedname_t fixed;
dns_fixedname_t fixedbottom;
dns_rdata_mx_t mx;
dns_rdata_ns_t ns;
dns_rdata_in_srv_t srv;
dns_rdata_t rdata;
dns_name_t *name;
dns_name_t *bottom;
isc_result_t result;
bool ok = true, have_spf, have_txt;
name = dns_fixedname_initname(&fixed);
bottom = dns_fixedname_initname(&fixedbottom);
dns_rdataset_init(&rdataset);
dns_rdata_init(&rdata);
result = dns_db_createiterator(db, 0, &dbiterator);
if (result != ISC_R_SUCCESS)
return (true);
result = dns_dbiterator_first(dbiterator);
while (result == ISC_R_SUCCESS) {
result = dns_dbiterator_current(dbiterator, &node, name);
if (result != ISC_R_SUCCESS)
goto cleanup;
/*
* Is this name visible in the zone?
*/
if (!dns_name_issubdomain(name, &zone->origin) ||
(dns_name_countlabels(bottom) > 0 &&
dns_name_issubdomain(name, bottom)))
goto next;
/*
* Don't check the NS records at the origin.
*/
if (dns_name_equal(name, &zone->origin))
goto checkfordname;
result = dns_db_findrdataset(db, node, NULL, dns_rdatatype_ns,
0, 0, &rdataset, NULL);
if (result != ISC_R_SUCCESS)
goto checkfordname;
/*
* Remember bottom of zone due to NS.
*/
dns_name_copy(name, bottom, NULL);
result = dns_rdataset_first(&rdataset);
while (result == ISC_R_SUCCESS) {
dns_rdataset_current(&rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &ns, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (!zone_check_glue(zone, db, &ns.name, name))
ok = false;
dns_rdata_reset(&rdata);
result = dns_rdataset_next(&rdataset);
}
dns_rdataset_disassociate(&rdataset);
goto next;
checkfordname:
result = dns_db_findrdataset(db, node, NULL,
dns_rdatatype_dname, 0, 0,
&rdataset, NULL);
if (result == ISC_R_SUCCESS) {
/*
* Remember bottom of zone due to DNAME.
*/
dns_name_copy(name, bottom, NULL);
dns_rdataset_disassociate(&rdataset);
}
result = dns_db_findrdataset(db, node, NULL, dns_rdatatype_mx,
0, 0, &rdataset, NULL);
if (result != ISC_R_SUCCESS)
goto checksrv;
result = dns_rdataset_first(&rdataset);
while (result == ISC_R_SUCCESS) {
dns_rdataset_current(&rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &mx, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (!zone_check_mx(zone, db, &mx.mx, name))
ok = false;
dns_rdata_reset(&rdata);
result = dns_rdataset_next(&rdataset);
}
dns_rdataset_disassociate(&rdataset);
checksrv:
if (zone->rdclass != dns_rdataclass_in)
goto next;
result = dns_db_findrdataset(db, node, NULL, dns_rdatatype_srv,
0, 0, &rdataset, NULL);
if (result != ISC_R_SUCCESS)
goto checkspf;
result = dns_rdataset_first(&rdataset);
while (result == ISC_R_SUCCESS) {
dns_rdataset_current(&rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &srv, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (!zone_check_srv(zone, db, &srv.target, name))
ok = false;
dns_rdata_reset(&rdata);
result = dns_rdataset_next(&rdataset);
}
dns_rdataset_disassociate(&rdataset);
checkspf:
/*
* Check if there is a type SPF record without an
* SPF-formatted type TXT record also being present.
*/
if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKSPF))
goto next;
if (zone->rdclass != dns_rdataclass_in)
goto next;
have_spf = have_txt = false;
result = dns_db_findrdataset(db, node, NULL, dns_rdatatype_spf,
0, 0, &rdataset, NULL);
if (result == ISC_R_SUCCESS) {
dns_rdataset_disassociate(&rdataset);
have_spf = true;
}
result = dns_db_findrdataset(db, node, NULL, dns_rdatatype_txt,
0, 0, &rdataset, NULL);
if (result != ISC_R_SUCCESS)
goto notxt;
result = dns_rdataset_first(&rdataset);
while (result == ISC_R_SUCCESS) {
dns_rdataset_current(&rdataset, &rdata);
have_txt = isspf(&rdata);
dns_rdata_reset(&rdata);
if (have_txt)
break;
result = dns_rdataset_next(&rdataset);
}
dns_rdataset_disassociate(&rdataset);
notxt:
if (have_spf && !have_txt) {
char namebuf[DNS_NAME_FORMATSIZE];
dns_name_format(name, namebuf, sizeof(namebuf));
dns_zone_log(zone, ISC_LOG_WARNING, "'%s' found type "
"SPF record but no SPF TXT record found, "
"add matching type TXT record", namebuf);
}
next:
dns_db_detachnode(db, &node);
result = dns_dbiterator_next(dbiterator);
}
cleanup:
if (node != NULL)
dns_db_detachnode(db, &node);
dns_dbiterator_destroy(&dbiterator);
return (ok);
}
/*
* OpenSSL verification of RSA keys with exponent 3 is known to be
* broken prior OpenSSL 0.9.8c/0.9.7k. Look for such keys and warn
* if they are in use.
*/
static void
zone_check_dnskeys(dns_zone_t *zone, dns_db_t *db) {
dns_dbnode_t *node = NULL;
dns_dbversion_t *version = NULL;
dns_rdata_dnskey_t dnskey;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_t rdataset;
isc_result_t result;
bool logit, foundrsa = false, foundmd5 = false;
const char *algorithm;
result = dns_db_findnode(db, &zone->origin, false, &node);
if (result != ISC_R_SUCCESS)
goto cleanup;
dns_db_currentversion(db, &version);
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(db, node, version, dns_rdatatype_dnskey,
dns_rdatatype_none, 0, &rdataset, NULL);
if (result != ISC_R_SUCCESS)
goto cleanup;
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset))
{
dns_rdataset_current(&rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &dnskey, NULL);
INSIST(result == ISC_R_SUCCESS);
if ((dnskey.algorithm == DST_ALG_RSASHA1 ||
dnskey.algorithm == DST_ALG_RSAMD5) &&
dnskey.datalen > 1 && dnskey.data[0] == 1 &&
dnskey.data[1] == 3)
{
if (dnskey.algorithm == DST_ALG_RSASHA1) {
logit = !foundrsa;
foundrsa = true;
algorithm = "RSASHA1";
} else {
logit = !foundmd5;
foundmd5 = true;
algorithm = "RSAMD5";
}
if (logit)
dns_zone_log(zone, ISC_LOG_WARNING,
"weak %s (%u) key found "
"(exponent=3)", algorithm,
dnskey.algorithm);
if (foundrsa && foundmd5)
break;
}
dns_rdata_reset(&rdata);
}
dns_rdataset_disassociate(&rdataset);
cleanup:
if (node != NULL)
dns_db_detachnode(db, &node);
if (version != NULL)
dns_db_closeversion(db, &version, false);
}
static void
resume_signingwithkey(dns_zone_t *zone) {
dns_dbnode_t *node = NULL;
dns_dbversion_t *version = NULL;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_t rdataset;
isc_result_t result;
dns_db_t *db = NULL;
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL)
dns_db_attach(zone->db, &db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
if (db == NULL)
goto cleanup;
result = dns_db_findnode(db, &zone->origin, false, &node);
if (result != ISC_R_SUCCESS)
goto cleanup;
dns_db_currentversion(db, &version);
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(db, node, version,
zone->privatetype,
dns_rdatatype_none, 0,
&rdataset, NULL);
if (result != ISC_R_SUCCESS) {
INSIST(!dns_rdataset_isassociated(&rdataset));
goto cleanup;
}
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset))
{
dns_rdataset_current(&rdataset, &rdata);
if (rdata.length != 5 ||
rdata.data[0] == 0 || rdata.data[4] != 0) {
dns_rdata_reset(&rdata);
continue;
}
result = zone_signwithkey(zone, rdata.data[0],
(rdata.data[1] << 8) | rdata.data[2],
rdata.data[3]);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_signwithkey failed: %s",
dns_result_totext(result));
}
dns_rdata_reset(&rdata);
}
dns_rdataset_disassociate(&rdataset);
cleanup:
if (db != NULL) {
if (node != NULL)
dns_db_detachnode(db, &node);
if (version != NULL)
dns_db_closeversion(db, &version, false);
dns_db_detach(&db);
}
}
/*
* Initiate adding/removing NSEC3 records belonging to the chain defined by the
* supplied NSEC3PARAM RDATA.
*
* Zone must be locked by caller.
*/
static isc_result_t
zone_addnsec3chain(dns_zone_t *zone, dns_rdata_nsec3param_t *nsec3param) {
dns_nsec3chain_t *nsec3chain, *current;
dns_dbversion_t *version = NULL;
bool nseconly = false, nsec3ok = false;
isc_result_t result;
isc_time_t now;
unsigned int options = 0;
char saltbuf[255*2+1];
char flags[sizeof("INITIAL|REMOVE|CREATE|NONSEC|OPTOUT")];
dns_db_t *db = NULL;
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL)
dns_db_attach(zone->db, &db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
if (db == NULL) {
result = ISC_R_SUCCESS;
goto cleanup;
}
/*
* If this zone is not NSEC3-capable, attempting to remove any NSEC3
* chain from it is pointless as it would not be possible for the
* latter to exist in the first place.
*/
dns_db_currentversion(db, &version);
result = dns_nsec_nseconly(db, version, &nseconly);
nsec3ok = (result == ISC_R_SUCCESS && !nseconly);
dns_db_closeversion(db, &version, false);
if (!nsec3ok && (nsec3param->flags & DNS_NSEC3FLAG_REMOVE) == 0) {
result = ISC_R_SUCCESS;
goto cleanup;
}
/*
* Allocate and initialize structure preserving state of
* adding/removing records belonging to this NSEC3 chain between
* separate zone_nsec3chain() calls.
*/
nsec3chain = isc_mem_get(zone->mctx, sizeof *nsec3chain);
if (nsec3chain == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup;
}
nsec3chain->magic = 0;
nsec3chain->done = false;
nsec3chain->db = NULL;
nsec3chain->dbiterator = NULL;
nsec3chain->nsec3param.common.rdclass = nsec3param->common.rdclass;
nsec3chain->nsec3param.common.rdtype = nsec3param->common.rdtype;
nsec3chain->nsec3param.hash = nsec3param->hash;
nsec3chain->nsec3param.iterations = nsec3param->iterations;
nsec3chain->nsec3param.flags = nsec3param->flags;
nsec3chain->nsec3param.salt_length = nsec3param->salt_length;
memmove(nsec3chain->salt, nsec3param->salt, nsec3param->salt_length);
nsec3chain->nsec3param.salt = nsec3chain->salt;
nsec3chain->seen_nsec = false;
nsec3chain->delete_nsec = false;
nsec3chain->save_delete_nsec = false;
/*
* Log NSEC3 parameters defined by supplied NSEC3PARAM RDATA.
*/
if (nsec3param->flags == 0)
strlcpy(flags, "NONE", sizeof(flags));
else {
flags[0] = '\0';
if ((nsec3param->flags & DNS_NSEC3FLAG_REMOVE) != 0) {
strlcat(flags, "REMOVE", sizeof(flags));
}
if ((nsec3param->flags & DNS_NSEC3FLAG_INITIAL) != 0) {
if (flags[0] == '\0')
strlcpy(flags, "INITIAL", sizeof(flags));
else
strlcat(flags, "|INITIAL", sizeof(flags));
}
if ((nsec3param->flags & DNS_NSEC3FLAG_CREATE) != 0) {
if (flags[0] == '\0')
strlcpy(flags, "CREATE", sizeof(flags));
else
strlcat(flags, "|CREATE", sizeof(flags));
}
if ((nsec3param->flags & DNS_NSEC3FLAG_NONSEC) != 0) {
if (flags[0] == '\0')
strlcpy(flags, "NONSEC", sizeof(flags));
else
strlcat(flags, "|NONSEC", sizeof(flags));
}
if ((nsec3param->flags & DNS_NSEC3FLAG_OPTOUT) != 0) {
if (flags[0] == '\0')
strlcpy(flags, "OPTOUT", sizeof(flags));
else
strlcat(flags, "|OPTOUT", sizeof(flags));
}
}
result = dns_nsec3param_salttotext(nsec3param, saltbuf,
sizeof(saltbuf));
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_zone_log(zone, ISC_LOG_INFO,
"zone_addnsec3chain(%u,%s,%u,%s)",
nsec3param->hash, flags, nsec3param->iterations,
saltbuf);
/*
* If the NSEC3 chain defined by the supplied NSEC3PARAM RDATA is
* currently being processed, interrupt its processing to avoid
* simultaneously adding and removing records for the same NSEC3 chain.
*/
for (current = ISC_LIST_HEAD(zone->nsec3chain);
current != NULL;
current = ISC_LIST_NEXT(current, link)) {
if (current->db == db &&
current->nsec3param.hash == nsec3param->hash &&
current->nsec3param.iterations == nsec3param->iterations &&
current->nsec3param.salt_length == nsec3param->salt_length
&& !memcmp(current->nsec3param.salt, nsec3param->salt,
nsec3param->salt_length))
current->done = true;
}
/*
* Attach zone database to the structure initialized above and create
* an iterator for it with appropriate options in order to avoid
* creating NSEC3 records for NSEC3 records.
*/
dns_db_attach(db, &nsec3chain->db);
if ((nsec3chain->nsec3param.flags & DNS_NSEC3FLAG_CREATE) != 0)
options = DNS_DB_NONSEC3;
result = dns_db_createiterator(nsec3chain->db, options,
&nsec3chain->dbiterator);
if (result == ISC_R_SUCCESS)
result = dns_dbiterator_first(nsec3chain->dbiterator);
if (result == ISC_R_SUCCESS) {
/*
* Database iterator initialization succeeded. We are now
* ready to kick off adding/removing records belonging to this
* NSEC3 chain. Append the structure initialized above to the
* "nsec3chain" list for the zone and set the appropriate zone
* timer so that zone_nsec3chain() is called as soon as
* possible.
*/
dns_dbiterator_pause(nsec3chain->dbiterator);
ISC_LIST_INITANDAPPEND(zone->nsec3chain,
nsec3chain, link);
nsec3chain = NULL;
if (isc_time_isepoch(&zone->nsec3chaintime)) {
TIME_NOW(&now);
zone->nsec3chaintime = now;
if (zone->task != NULL)
zone_settimer(zone, &now);
}
}
if (nsec3chain != NULL) {
if (nsec3chain->db != NULL)
dns_db_detach(&nsec3chain->db);
if (nsec3chain->dbiterator != NULL)
dns_dbiterator_destroy(&nsec3chain->dbiterator);
isc_mem_put(zone->mctx, nsec3chain, sizeof *nsec3chain);
}
cleanup:
if (db != NULL)
dns_db_detach(&db);
return (result);
}
/*
* Find private-type records at the zone apex which signal that an NSEC3 chain
* should be added or removed. For each such record, extract NSEC3PARAM RDATA
* and pass it to zone_addnsec3chain().
*
* Zone must be locked by caller.
*/
static void
resume_addnsec3chain(dns_zone_t *zone) {
dns_dbnode_t *node = NULL;
dns_dbversion_t *version = NULL;
dns_rdataset_t rdataset;
isc_result_t result;
dns_rdata_nsec3param_t nsec3param;
bool nseconly = false, nsec3ok = false;
dns_db_t *db = NULL;
INSIST(LOCKED_ZONE(zone));
if (zone->privatetype == 0)
return;
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL)
dns_db_attach(zone->db, &db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
if (db == NULL)
goto cleanup;
result = dns_db_findnode(db, &zone->origin, false, &node);
if (result != ISC_R_SUCCESS)
goto cleanup;
dns_db_currentversion(db, &version);
/*
* In order to create NSEC3 chains we need the DNSKEY RRset at zone
* apex to exist and contain no keys using NSEC-only algorithms.
*/
result = dns_nsec_nseconly(db, version, &nseconly);
nsec3ok = (result == ISC_R_SUCCESS && !nseconly);
/*
* Get the RRset containing all private-type records at the zone apex.
*/
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(db, node, version,
zone->privatetype, dns_rdatatype_none,
0, &rdataset, NULL);
if (result != ISC_R_SUCCESS) {
INSIST(!dns_rdataset_isassociated(&rdataset));
goto cleanup;
}
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset))
{
unsigned char buf[DNS_NSEC3PARAM_BUFFERSIZE];
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdata_t private = DNS_RDATA_INIT;
dns_rdataset_current(&rdataset, &private);
/*
* Try extracting NSEC3PARAM RDATA from this private-type
* record. Failure means this private-type record does not
* represent an NSEC3PARAM record, so skip it.
*/
if (!dns_nsec3param_fromprivate(&private, &rdata, buf,
sizeof(buf)))
continue;
result = dns_rdata_tostruct(&rdata, &nsec3param, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (((nsec3param.flags & DNS_NSEC3FLAG_REMOVE) != 0) ||
((nsec3param.flags & DNS_NSEC3FLAG_CREATE) != 0 && nsec3ok))
{
/*
* Pass the NSEC3PARAM RDATA contained in this
* private-type record to zone_addnsec3chain() so that
* it can kick off adding or removing NSEC3 records.
*/
result = zone_addnsec3chain(zone, &nsec3param);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_addnsec3chain failed: %s",
dns_result_totext(result));
}
}
}
dns_rdataset_disassociate(&rdataset);
cleanup:
if (db != NULL) {
if (node != NULL)
dns_db_detachnode(db, &node);
if (version != NULL)
dns_db_closeversion(db, &version, false);
dns_db_detach(&db);
}
}
static void
set_resigntime(dns_zone_t *zone) {
dns_rdataset_t rdataset;
dns_fixedname_t fixed;
unsigned int resign;
isc_result_t result;
uint32_t nanosecs;
dns_db_t *db = NULL;
INSIST(LOCKED_ZONE(zone));
/* We only re-sign zones that can be dynamically updated */
if (zone->update_disabled)
return;
if (!inline_secure(zone) && (zone->type != dns_zone_master ||
(zone->ssutable == NULL &&
(zone->update_acl == NULL || dns_acl_isnone(zone->update_acl)))))
return;
dns_rdataset_init(&rdataset);
dns_fixedname_init(&fixed);
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL)
dns_db_attach(zone->db, &db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
if (db == NULL) {
isc_time_settoepoch(&zone->resigntime);
return;
}
result = dns_db_getsigningtime(db, &rdataset,
dns_fixedname_name(&fixed));
if (result != ISC_R_SUCCESS) {
isc_time_settoepoch(&zone->resigntime);
goto cleanup;
}
resign = rdataset.resign - zone->sigresigninginterval;
dns_rdataset_disassociate(&rdataset);
isc_random_get(&nanosecs);
nanosecs %= 1000000000;
isc_time_set(&zone->resigntime, resign, nanosecs);
cleanup:
dns_db_detach(&db);
return;
}
static isc_result_t
check_nsec3param(dns_zone_t *zone, dns_db_t *db) {
dns_dbnode_t *node = NULL;
dns_rdataset_t rdataset;
dns_dbversion_t *version = NULL;
dns_rdata_nsec3param_t nsec3param;
bool ok = false;
isc_result_t result;
dns_rdata_t rdata = DNS_RDATA_INIT;
bool dynamic = (zone->type == dns_zone_master) ?
dns_zone_isdynamic(zone, false) : false;
dns_rdataset_init(&rdataset);
result = dns_db_findnode(db, &zone->origin, false, &node);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"nsec3param lookup failure: %s",
dns_result_totext(result));
return (result);
}
dns_db_currentversion(db, &version);
result = dns_db_findrdataset(db, node, version,
dns_rdatatype_nsec3param,
dns_rdatatype_none, 0, &rdataset, NULL);
if (result == ISC_R_NOTFOUND) {
INSIST(!dns_rdataset_isassociated(&rdataset));
result = ISC_R_SUCCESS;
goto cleanup;
}
if (result != ISC_R_SUCCESS) {
INSIST(!dns_rdataset_isassociated(&rdataset));
dns_zone_log(zone, ISC_LOG_ERROR,
"nsec3param lookup failure: %s",
dns_result_totext(result));
goto cleanup;
}
/*
* For dynamic zones we must support every algorithm so we can
* regenerate all the NSEC3 chains.
* For non-dynamic zones we only need to find a supported algorithm.
*/
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset))
{
dns_rdataset_current(&rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &nsec3param, NULL);
dns_rdata_reset(&rdata);
INSIST(result == ISC_R_SUCCESS);
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_NSEC3TESTZONE) &&
nsec3param.hash == DNS_NSEC3_UNKNOWNALG && !dynamic)
{
dns_zone_log(zone, ISC_LOG_WARNING,
"nsec3 test \"unknown\" hash algorithm found: %u",
nsec3param.hash);
ok = true;
} else if (!dns_nsec3_supportedhash(nsec3param.hash)) {
if (dynamic) {
dns_zone_log(zone, ISC_LOG_ERROR,
"unsupported nsec3 hash algorithm"
" in dynamic zone: %u",
nsec3param.hash);
result = DNS_R_BADZONE;
/* Stop second error message. */
ok = true;
break;
} else
dns_zone_log(zone, ISC_LOG_WARNING,
"unsupported nsec3 hash algorithm: %u",
nsec3param.hash);
} else
ok = true;
}
if (result == ISC_R_NOMORE)
result = ISC_R_SUCCESS;
if (!ok) {
result = DNS_R_BADZONE;
dns_zone_log(zone, ISC_LOG_ERROR,
"no supported nsec3 hash algorithm");
}
cleanup:
if (dns_rdataset_isassociated(&rdataset))
dns_rdataset_disassociate(&rdataset);
dns_db_closeversion(db, &version, false);
dns_db_detachnode(db, &node);
return (result);
}
/*
* Set the timer for refreshing the key zone to the soonest future time
* of the set (current timer, keydata->refresh, keydata->addhd,
* keydata->removehd).
*/
static void
set_refreshkeytimer(dns_zone_t *zone, dns_rdata_keydata_t *key,
isc_stdtime_t now, bool force)
{
const char me[] = "set_refreshkeytimer";
isc_stdtime_t then;
isc_time_t timenow, timethen;
char timebuf[80];
ENTER;
then = key->refresh;
if (force)
then = now;
if (key->addhd > now && key->addhd < then)
then = key->addhd;
if (key->removehd > now && key->removehd < then)
then = key->removehd;
TIME_NOW(&timenow);
if (then > now)
DNS_ZONE_TIME_ADD(&timenow, then - now, &timethen);
else
timethen = timenow;
if (isc_time_compare(&zone->refreshkeytime, &timenow) < 0 ||
isc_time_compare(&timethen, &zone->refreshkeytime) < 0)
zone->refreshkeytime = timethen;
isc_time_formattimestamp(&zone->refreshkeytime, timebuf, 80);
dns_zone_log(zone, ISC_LOG_DEBUG(1), "next key refresh: %s", timebuf);
zone_settimer(zone, &timenow);
}
/*
* Convert key(s) linked from 'keynode' to KEYDATA and add to the key zone.
* If the key zone is changed, set '*changed' to true.
*/
static isc_result_t
create_keydata(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *ver,
dns_diff_t *diff, dns_keytable_t *keytable,
dns_keynode_t **keynodep, bool *changed)
{
const char me[] = "create_keydata";
isc_result_t result = ISC_R_SUCCESS;
isc_buffer_t keyb, dstb;
unsigned char key_buf[4096], dst_buf[DST_KEY_MAXSIZE];
dns_rdata_keydata_t keydata;
dns_rdata_dnskey_t dnskey;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_keynode_t *keynode;
isc_stdtime_t now;
isc_region_t r;
dst_key_t *key;
REQUIRE(keynodep != NULL);
keynode = *keynodep;
ENTER;
isc_stdtime_get(&now);
/* Loop in case there's more than one key. */
while (result == ISC_R_SUCCESS) {
dns_keynode_t *nextnode = NULL;
key = dns_keynode_key(keynode);
if (key == NULL)
goto skip;
isc_buffer_init(&dstb, dst_buf, sizeof(dst_buf));
CHECK(dst_key_todns(key, &dstb));
/* Convert DST key to DNSKEY. */
dns_rdata_reset(&rdata);
isc_buffer_usedregion(&dstb, &r);
dns_rdata_fromregion(&rdata, dst_key_class(key),
dns_rdatatype_dnskey, &r);
/* DSTKEY to KEYDATA. */
CHECK(dns_rdata_tostruct(&rdata, &dnskey, NULL));
CHECK(dns_keydata_fromdnskey(&keydata, &dnskey, now, 0, 0,
NULL));
/* KEYDATA to rdata. */
dns_rdata_reset(&rdata);
isc_buffer_init(&keyb, key_buf, sizeof(key_buf));
CHECK(dns_rdata_fromstruct(&rdata,
zone->rdclass, dns_rdatatype_keydata,
&keydata, &keyb));
/* Add rdata to zone. */
CHECK(update_one_rr(db, ver, diff, DNS_DIFFOP_ADD,
dst_key_name(key), 0, &rdata));
*changed = true;
/* Refresh new keys from the zone apex as soon as possible. */
set_refreshkeytimer(zone, &keydata, now, true);
skip:
result = dns_keytable_nextkeynode(keytable, keynode, &nextnode);
if (result != ISC_R_NOTFOUND) {
dns_keytable_detachkeynode(keytable, &keynode);
keynode = nextnode;
}
}
if (keynode != NULL)
dns_keytable_detachkeynode(keytable, &keynode);
*keynodep = NULL;
return (ISC_R_SUCCESS);
failure:
return (result);
}
/*
* Remove from the key zone all the KEYDATA records found in rdataset.
*/
static isc_result_t
delete_keydata(dns_db_t *db, dns_dbversion_t *ver, dns_diff_t *diff,
dns_name_t *name, dns_rdataset_t *rdataset)
{
dns_rdata_t rdata = DNS_RDATA_INIT;
isc_result_t result, uresult;
for (result = dns_rdataset_first(rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(rdataset)) {
dns_rdata_reset(&rdata);
dns_rdataset_current(rdataset, &rdata);
uresult = update_one_rr(db, ver, diff, DNS_DIFFOP_DEL,
name, 0, &rdata);
if (uresult != ISC_R_SUCCESS)
return (uresult);
}
if (result == ISC_R_NOMORE)
result = ISC_R_SUCCESS;
return (result);
}
/*
* Compute the DNSSEC key ID for a DNSKEY record.
*/
static isc_result_t
compute_tag(dns_name_t *name, dns_rdata_dnskey_t *dnskey, isc_mem_t *mctx,
dns_keytag_t *tag)
{
isc_result_t result;
dns_rdata_t rdata = DNS_RDATA_INIT;
unsigned char data[4096];
isc_buffer_t buffer;
dst_key_t *dstkey = NULL;
isc_buffer_init(&buffer, data, sizeof(data));
dns_rdata_fromstruct(&rdata, dnskey->common.rdclass,
dns_rdatatype_dnskey, dnskey, &buffer);
result = dns_dnssec_keyfromrdata(name, &rdata, mctx, &dstkey);
if (result == ISC_R_SUCCESS) {
*tag = dst_key_id(dstkey);
dst_key_free(&dstkey);
}
return (result);
}
/*
* Add key to the security roots.
*/
static void
trust_key(dns_zone_t *zone, dns_name_t *keyname,
dns_rdata_dnskey_t *dnskey, isc_mem_t *mctx)
{
isc_result_t result;
dns_rdata_t rdata = DNS_RDATA_INIT;
unsigned char data[4096];
isc_buffer_t buffer;
dns_keytable_t *sr = NULL;
dst_key_t *dstkey = NULL;
/* Convert dnskey to DST key. */
isc_buffer_init(&buffer, data, sizeof(data));
dns_rdata_fromstruct(&rdata, dnskey->common.rdclass,
dns_rdatatype_dnskey, dnskey, &buffer);
result = dns_view_getsecroots(zone->view, &sr);
if (result != ISC_R_SUCCESS)
goto failure;
CHECK(dns_dnssec_keyfromrdata(keyname, &rdata, mctx, &dstkey));
CHECK(dns_keytable_add(sr, true, &dstkey));
dns_keytable_detach(&sr);
failure:
if (dstkey != NULL)
dst_key_free(&dstkey);
if (sr != NULL)
dns_keytable_detach(&sr);
return;
}
/*
* Add a null key to the security roots for so that all queries
* to the zone will fail.
*/
static void
fail_secure(dns_zone_t *zone, dns_name_t *keyname) {
isc_result_t result;
dns_keytable_t *sr = NULL;
result = dns_view_getsecroots(zone->view, &sr);
if (result == ISC_R_SUCCESS) {
dns_keytable_marksecure(sr, keyname);
dns_keytable_detach(&sr);
}
}
/*
* Scan a set of KEYDATA records from the key zone. The ones that are
* valid (i.e., the add holddown timer has expired) become trusted keys.
*/
static void
load_secroots(dns_zone_t *zone, dns_name_t *name, dns_rdataset_t *rdataset) {
isc_result_t result;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdata_keydata_t keydata;
dns_rdata_dnskey_t dnskey;
isc_mem_t *mctx = zone->mctx;
int trusted = 0, revoked = 0, pending = 0;
isc_stdtime_t now;
dns_keytable_t *sr = NULL;
isc_stdtime_get(&now);
result = dns_view_getsecroots(zone->view, &sr);
if (result == ISC_R_SUCCESS) {
dns_keytable_delete(sr, name);
dns_keytable_detach(&sr);
}
/* Now insert all the accepted trust anchors from this keydata set. */
for (result = dns_rdataset_first(rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(rdataset)) {
dns_rdata_reset(&rdata);
dns_rdataset_current(rdataset, &rdata);
/* Convert rdata to keydata. */
result = dns_rdata_tostruct(&rdata, &keydata, NULL);
if (result == ISC_R_UNEXPECTEDEND)
continue;
RUNTIME_CHECK(result == ISC_R_SUCCESS);
/* Set the key refresh timer to force a fast refresh. */
set_refreshkeytimer(zone, &keydata, now, true);
/* If the removal timer is nonzero, this key was revoked. */
if (keydata.removehd != 0) {
revoked++;
continue;
}
/*
* If the add timer is still pending, this key is not
* trusted yet.
*/
if (now < keydata.addhd) {
pending++;
continue;
}
/* Convert keydata to dnskey. */
dns_keydata_todnskey(&keydata, &dnskey, NULL);
/* Add to keytables. */
trusted++;
trust_key(zone, name, &dnskey, mctx);
}
if (trusted == 0 && pending != 0) {
char namebuf[DNS_NAME_FORMATSIZE];
dns_name_format(name, namebuf, sizeof namebuf);
dns_zone_log(zone, ISC_LOG_ERROR,
"No valid trust anchors for '%s'!", namebuf);
dns_zone_log(zone, ISC_LOG_ERROR,
"%d key(s) revoked, %d still pending",
revoked, pending);
dns_zone_log(zone, ISC_LOG_ERROR,
"All queries to '%s' will fail", namebuf);
fail_secure(zone, name);
}
}
static isc_result_t
do_one_tuple(dns_difftuple_t **tuple, dns_db_t *db, dns_dbversion_t *ver,
dns_diff_t *diff)
{
dns_diff_t temp_diff;
isc_result_t result;
/*
* Create a singleton diff.
*/
dns_diff_init(diff->mctx, &temp_diff);
ISC_LIST_APPEND(temp_diff.tuples, *tuple, link);
/*
* Apply it to the database.
*/
result = dns_diff_apply(&temp_diff, db, ver);
ISC_LIST_UNLINK(temp_diff.tuples, *tuple, link);
if (result != ISC_R_SUCCESS) {
dns_difftuple_free(tuple);
return (result);
}
/*
* Merge it into the current pending journal entry.
*/
dns_diff_appendminimal(diff, tuple);
/*
* Do not clear temp_diff.
*/
return (ISC_R_SUCCESS);
}
static isc_result_t
update_one_rr(dns_db_t *db, dns_dbversion_t *ver, dns_diff_t *diff,
dns_diffop_t op, dns_name_t *name, dns_ttl_t ttl,
dns_rdata_t *rdata)
{
dns_difftuple_t *tuple = NULL;
isc_result_t result;
result = dns_difftuple_create(diff->mctx, op,
name, ttl, rdata, &tuple);
if (result != ISC_R_SUCCESS)
return (result);
return (do_one_tuple(&tuple, db, ver, diff));
}
static isc_result_t
update_soa_serial(dns_db_t *db, dns_dbversion_t *ver, dns_diff_t *diff,
isc_mem_t *mctx, dns_updatemethod_t method) {
dns_difftuple_t *deltuple = NULL;
dns_difftuple_t *addtuple = NULL;
uint32_t serial;
isc_result_t result;
INSIST(method != dns_updatemethod_none);
CHECK(dns_db_createsoatuple(db, ver, mctx, DNS_DIFFOP_DEL, &deltuple));
CHECK(dns_difftuple_copy(deltuple, &addtuple));
addtuple->op = DNS_DIFFOP_ADD;
serial = dns_soa_getserial(&addtuple->rdata);
serial = dns_update_soaserial(serial, method);
dns_soa_setserial(serial, &addtuple->rdata);
CHECK(do_one_tuple(&deltuple, db, ver, diff));
CHECK(do_one_tuple(&addtuple, db, ver, diff));
result = ISC_R_SUCCESS;
failure:
if (addtuple != NULL)
dns_difftuple_free(&addtuple);
if (deltuple != NULL)
dns_difftuple_free(&deltuple);
return (result);
}
/*
* Write all transactions in 'diff' to the zone journal file.
*/
static isc_result_t
zone_journal(dns_zone_t *zone, dns_diff_t *diff, uint32_t *sourceserial,
const char *caller)
{
const char me[] = "zone_journal";
const char *journalfile;
isc_result_t result = ISC_R_SUCCESS;
dns_journal_t *journal = NULL;
unsigned int mode = DNS_JOURNAL_CREATE|DNS_JOURNAL_WRITE;
ENTER;
journalfile = dns_zone_getjournal(zone);
if (journalfile != NULL) {
result = dns_journal_open(zone->mctx, journalfile, mode,
&journal);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"%s:dns_journal_open -> %s",
caller, dns_result_totext(result));
return (result);
}
if (sourceserial != NULL)
dns_journal_set_sourceserial(journal, *sourceserial);
result = dns_journal_write_transaction(journal, diff);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"%s:dns_journal_write_transaction -> %s",
caller, dns_result_totext(result));
}
dns_journal_destroy(&journal);
}
return (result);
}
/*
* Create an SOA record for a newly-created zone
*/
static isc_result_t
add_soa(dns_zone_t *zone, dns_db_t *db) {
isc_result_t result;
dns_rdata_t rdata = DNS_RDATA_INIT;
unsigned char buf[DNS_SOA_BUFFERSIZE];
dns_dbversion_t *ver = NULL;
dns_diff_t diff;
dns_zone_log(zone, ISC_LOG_DEBUG(1), "creating SOA");
dns_diff_init(zone->mctx, &diff);
result = dns_db_newversion(db, &ver);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"add_soa:dns_db_newversion -> %s",
dns_result_totext(result));
goto failure;
}
/* Build SOA record */
result = dns_soa_buildrdata(&zone->origin, dns_rootname, zone->rdclass,
0, 0, 0, 0, 0, buf, &rdata);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"add_soa:dns_soa_buildrdata -> %s",
dns_result_totext(result));
goto failure;
}
result = update_one_rr(db, ver, &diff, DNS_DIFFOP_ADD,
&zone->origin, 0, &rdata);
failure:
dns_diff_clear(&diff);
if (ver != NULL)
dns_db_closeversion(db, &ver, (result == ISC_R_SUCCESS));
INSIST(ver == NULL);
return (result);
}
struct addifmissing_arg {
dns_db_t *db;
dns_dbversion_t *ver;
dns_diff_t *diff;
dns_zone_t *zone;
bool *changed;
isc_result_t result;
};
static void
addifmissing(dns_keytable_t *keytable, dns_keynode_t *keynode, void *arg) {
dns_db_t *db = ((struct addifmissing_arg *)arg)->db;
dns_dbversion_t *ver = ((struct addifmissing_arg *)arg)->ver;
dns_diff_t *diff = ((struct addifmissing_arg *)arg)->diff;
dns_zone_t *zone = ((struct addifmissing_arg *)arg)->zone;
bool *changed = ((struct addifmissing_arg *)arg)->changed;
isc_result_t result;
dns_keynode_t *dummy = NULL;
if (((struct addifmissing_arg *)arg)->result != ISC_R_SUCCESS)
return;
if (dns_keynode_managed(keynode)) {
dns_fixedname_t fname;
dns_name_t *keyname;
dst_key_t *key;
key = dns_keynode_key(keynode);
if (key == NULL)
return;
dns_fixedname_init(&fname);
keyname = dst_key_name(key);
result = dns_db_find(db, keyname, ver,
dns_rdatatype_keydata,
DNS_DBFIND_NOWILD, 0, NULL,
dns_fixedname_name(&fname),
NULL, NULL);
if (result == ISC_R_SUCCESS)
return;
dns_keytable_attachkeynode(keytable, keynode, &dummy);
result = create_keydata(zone, db, ver, diff, keytable,
&dummy, changed);
if (result != ISC_R_SUCCESS && result != ISC_R_NOMORE)
((struct addifmissing_arg *)arg)->result = result;
}
};
/*
* Synchronize the set of initializing keys found in managed-keys {}
* statements with the set of trust anchors found in the managed-keys.bind
* zone. If a domain is no longer named in managed-keys, delete all keys
* from that domain from the key zone. If a domain is mentioned in in
* managed-keys but there are no references to it in the key zone, load
* the key zone with the initializing key(s) for that domain.
*/
static isc_result_t
sync_keyzone(dns_zone_t *zone, dns_db_t *db) {
isc_result_t result = ISC_R_SUCCESS;
bool changed = false;
bool commit = false;
dns_keynode_t *keynode = NULL;
dns_view_t *view = zone->view;
dns_keytable_t *sr = NULL;
dns_dbversion_t *ver = NULL;
dns_diff_t diff;
dns_rriterator_t rrit;
struct addifmissing_arg arg;
dns_zone_log(zone, ISC_LOG_DEBUG(1), "synchronizing trusted keys");
dns_diff_init(zone->mctx, &diff);
CHECK(dns_view_getsecroots(view, &sr));
result = dns_db_newversion(db, &ver);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"sync_keyzone:dns_db_newversion -> %s",
dns_result_totext(result));
goto failure;
}
/*
* Walk the zone DB. If we find any keys whose names are no longer
* in managed-keys (or *are* in trusted-keys, meaning they are
* permanent and not RFC5011-maintained), delete them from the
* zone. Otherwise call load_secroots(), which loads keys into
* secroots as appropriate.
*/
dns_rriterator_init(&rrit, db, ver, 0);
for (result = dns_rriterator_first(&rrit);
result == ISC_R_SUCCESS;
result = dns_rriterator_nextrrset(&rrit)) {
dns_rdataset_t *rdataset = NULL;
dns_name_t *rrname = NULL;
uint32_t ttl;
dns_rriterator_current(&rrit, &rrname, &ttl,
&rdataset, NULL);
if (!dns_rdataset_isassociated(rdataset)) {
dns_rriterator_destroy(&rrit);
goto failure;
}
if (rdataset->type != dns_rdatatype_keydata)
continue;
result = dns_keytable_find(sr, rrname, &keynode);
if ((result != ISC_R_SUCCESS &&
result != DNS_R_PARTIALMATCH) ||
dns_keynode_managed(keynode) == false)
{
CHECK(delete_keydata(db, ver, &diff,
rrname, rdataset));
changed = true;
} else {
load_secroots(zone, rrname, rdataset);
}
if (keynode != NULL)
dns_keytable_detachkeynode(sr, &keynode);
}
dns_rriterator_destroy(&rrit);
/*
* Now walk secroots to find any managed keys that aren't
* in the zone. If we find any, we add them to the zone.
*/
arg.db = db;
arg.ver = ver;
arg.result = ISC_R_SUCCESS;
arg.diff = &diff;
arg.zone = zone;
arg.changed = &changed;
dns_keytable_forall(sr, addifmissing, &arg);
result = arg.result;
if (changed) {
/* Write changes to journal file. */
CHECK(update_soa_serial(db, ver, &diff, zone->mctx,
zone->updatemethod));
CHECK(zone_journal(zone, &diff, NULL, "sync_keyzone"));
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_LOADED);
zone_needdump(zone, 30);
commit = true;
}
failure:
if (result != ISC_R_SUCCESS &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED)) {
dns_zone_log(zone, ISC_LOG_ERROR,
"unable to synchronize managed keys: %s",
dns_result_totext(result));
isc_time_settoepoch(&zone->refreshkeytime);
}
if (keynode != NULL)
dns_keytable_detachkeynode(sr, &keynode);
if (sr != NULL)
dns_keytable_detach(&sr);
if (ver != NULL)
dns_db_closeversion(db, &ver, commit);
dns_diff_clear(&diff);
INSIST(ver == NULL);
return (result);
}
isc_result_t
dns_zone_synckeyzone(dns_zone_t *zone) {
isc_result_t result;
dns_db_t *db = NULL;
if (zone->type != dns_zone_key)
return (DNS_R_BADZONE);
CHECK(dns_zone_getdb(zone, &db));
LOCK_ZONE(zone);
result = sync_keyzone(zone, db);
UNLOCK_ZONE(zone);
failure:
if (db != NULL)
dns_db_detach(&db);
return (result);
}
static void
maybe_send_secure(dns_zone_t *zone) {
isc_result_t result;
/*
* We've finished loading, or else failed to load, an inline-signing
* 'secure' zone. We now need information about the status of the
* 'raw' zone. If we failed to load, then we need it to send a
* copy of its database; if we succeeded, we need it to send its
* serial number so that we can sync with it. If it has not yet
* loaded, we set a flag so that it will send the necessary
* information when it has finished loading.
*/
if (zone->raw->db != NULL) {
if (zone->db != NULL) {
uint32_t serial;
unsigned int soacount;
result = zone_get_from_db(zone->raw, zone->raw->db,
NULL, &soacount, &serial, NULL,
NULL, NULL, NULL, NULL);
if (result == ISC_R_SUCCESS && soacount > 0U)
zone_send_secureserial(zone->raw, serial);
} else
zone_send_securedb(zone->raw, zone->raw->db);
} else
DNS_ZONE_SETFLAG(zone->raw, DNS_ZONEFLG_SENDSECURE);
}
static bool
zone_unchanged(dns_db_t *db1, dns_db_t *db2, isc_mem_t *mctx) {
isc_result_t result;
bool answer = false;
dns_diff_t diff;
dns_diff_init(mctx, &diff);
result = dns_db_diffx(&diff, db1, NULL, db2, NULL, NULL);
if (result == ISC_R_SUCCESS && ISC_LIST_EMPTY(diff.tuples))
answer = true;
dns_diff_clear(&diff);
return (answer);
}
/*
* The zone is presumed to be locked.
* If this is a inline_raw zone the secure version is also locked.
*/
static isc_result_t
zone_postload(dns_zone_t *zone, dns_db_t *db, isc_time_t loadtime,
isc_result_t result)
{
unsigned int soacount = 0;
unsigned int nscount = 0;
unsigned int errors = 0;
uint32_t serial, oldserial, refresh, retry, expire, minimum;
isc_time_t now;
bool needdump = false;
bool hasinclude = DNS_ZONE_FLAG(zone, DNS_ZONEFLG_HASINCLUDE);
bool nomaster = false;
unsigned int options;
dns_include_t *inc;
INSIST(LOCKED_ZONE(zone));
if (inline_raw(zone))
INSIST(LOCKED_ZONE(zone->secure));
TIME_NOW(&now);
/*
* Initiate zone transfer? We may need a error code that
* indicates that the "permanent" form does not exist.
* XXX better error feedback to log.
*/
if (result != ISC_R_SUCCESS && result != DNS_R_SEENINCLUDE) {
if (zone->type == dns_zone_slave ||
zone->type == dns_zone_stub ||
(zone->type == dns_zone_redirect &&
zone->masters == NULL)) {
if (result == ISC_R_FILENOTFOUND)
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"no master file");
else if (result != DNS_R_NOMASTERFILE)
dns_zone_log(zone, ISC_LOG_ERROR,
"loading from master file %s "
"failed: %s",
zone->masterfile,
dns_result_totext(result));
} else if (zone->type == dns_zone_master &&
inline_secure(zone) && result == ISC_R_FILENOTFOUND)
{
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"no master file, requesting db");
maybe_send_secure(zone);
} else {
int level = ISC_LOG_ERROR;
if (zone->type == dns_zone_key &&
result == ISC_R_FILENOTFOUND)
level = ISC_LOG_DEBUG(1);
dns_zone_log(zone, level,
"loading from master file %s failed: %s",
zone->masterfile,
dns_result_totext(result));
nomaster = true;
}
if (zone->type != dns_zone_key)
goto cleanup;
}
dns_zone_log(zone, ISC_LOG_DEBUG(2),
"number of nodes in database: %u",
dns_db_nodecount(db));
if (result == DNS_R_SEENINCLUDE)
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_HASINCLUDE);
else
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_HASINCLUDE);
/*
* If there's no master file for a key zone, then the zone is new:
* create an SOA record. (We do this now, instead of later, so that
* if there happens to be a journal file, we can roll forward from
* a sane starting point.)
*/
if (nomaster && zone->type == dns_zone_key) {
result = add_soa(zone, db);
if (result != ISC_R_SUCCESS)
goto cleanup;
}
/*
* Apply update log, if any, on initial load.
*/
if (zone->journal != NULL &&
! DNS_ZONE_OPTION(zone, DNS_ZONEOPT_NOMERGE) &&
! DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED))
{
if (zone->type == dns_zone_master && (inline_secure(zone) ||
(zone->update_acl != NULL || zone->ssutable != NULL)))
{
options = DNS_JOURNALOPT_RESIGN;
} else {
options = 0;
}
result = dns_journal_rollforward(zone->mctx, db, options,
zone->journal);
if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND &&
result != DNS_R_UPTODATE && result != DNS_R_NOJOURNAL &&
result != ISC_R_RANGE) {
dns_zone_log(zone, ISC_LOG_ERROR,
"journal rollforward failed: %s",
dns_result_totext(result));
goto cleanup;
}
if (result == ISC_R_NOTFOUND || result == ISC_R_RANGE) {
dns_zone_log(zone, ISC_LOG_ERROR,
"journal rollforward failed: "
"journal out of sync with zone");
goto cleanup;
}
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"journal rollforward completed "
"successfully: %s",
dns_result_totext(result));
if (result == ISC_R_SUCCESS)
needdump = true;
}
/*
* Obtain ns, soa and cname counts for top of zone.
*/
INSIST(db != NULL);
result = zone_get_from_db(zone, db, &nscount, &soacount, &serial,
&refresh, &retry, &expire, &minimum,
&errors);
if (result != ISC_R_SUCCESS && zone->type != dns_zone_key) {
dns_zone_log(zone, ISC_LOG_ERROR,
"could not find NS and/or SOA records");
}
/*
* Check to make sure the journal is up to date, and remove the
* journal file if it isn't, as we wouldn't be able to apply
* updates otherwise.
*/
if (zone->journal != NULL && dns_zone_isdynamic(zone, true) &&
! DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IXFRFROMDIFFS)) {
uint32_t jserial;
dns_journal_t *journal = NULL;
result = dns_journal_open(zone->mctx, zone->journal,
DNS_JOURNAL_READ, &journal);
if (result == ISC_R_SUCCESS) {
jserial = dns_journal_last_serial(journal);
dns_journal_destroy(&journal);
} else {
jserial = serial;
result = ISC_R_SUCCESS;
}
if (jserial != serial) {
dns_zone_log(zone, ISC_LOG_INFO,
"journal file is out of date: "
"removing journal file");
if (remove(zone->journal) < 0 && errno != ENOENT) {
char strbuf[ISC_STRERRORSIZE];
isc__strerror(errno, strbuf, sizeof(strbuf));
isc_log_write(dns_lctx,
DNS_LOGCATEGORY_GENERAL,
DNS_LOGMODULE_ZONE,
ISC_LOG_WARNING,
"unable to remove journal "
"'%s': '%s'",
zone->journal, strbuf);
}
}
}
dns_zone_log(zone, ISC_LOG_DEBUG(1), "loaded; checking validity");
/*
* Master / Slave / Stub zones require both NS and SOA records at
* the top of the zone.
*/
switch (zone->type) {
case dns_zone_dlz:
case dns_zone_master:
case dns_zone_slave:
case dns_zone_stub:
case dns_zone_redirect:
if (soacount != 1) {
dns_zone_log(zone, ISC_LOG_ERROR,
"has %d SOA records", soacount);
result = DNS_R_BADZONE;
}
if (nscount == 0) {
dns_zone_log(zone, ISC_LOG_ERROR,
"has no NS records");
result = DNS_R_BADZONE;
}
if (result != ISC_R_SUCCESS)
goto cleanup;
if (zone->type == dns_zone_master && errors != 0) {
result = DNS_R_BADZONE;
goto cleanup;
}
if (zone->type != dns_zone_stub &&
zone->type != dns_zone_redirect) {
result = check_nsec3param(zone, db);
if (result != ISC_R_SUCCESS)
goto cleanup;
}
if (zone->type == dns_zone_master &&
DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKINTEGRITY) &&
!integrity_checks(zone, db)) {
result = DNS_R_BADZONE;
goto cleanup;
}
if (zone->type == dns_zone_master &&
DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKDUPRR) &&
!zone_check_dup(zone, db)) {
result = DNS_R_BADZONE;
goto cleanup;
}
if (zone->type == dns_zone_master) {
result = dns_zone_cdscheck(zone, db, NULL);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"CDS/CDNSKEY consistency checks "
"failed");
goto cleanup;
}
}
if (zone->db != NULL) {
unsigned int oldsoacount;
/*
* This is checked in zone_replacedb() for slave zones
* as they don't reload from disk.
*/
result = zone_get_from_db(zone, zone->db, NULL,
&oldsoacount, &oldserial,
NULL, NULL, NULL, NULL,
NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
RUNTIME_CHECK(soacount > 0U);
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IXFRFROMDIFFS) &&
!isc_serial_gt(serial, oldserial)) {
uint32_t serialmin, serialmax;
INSIST(zone->type == dns_zone_master);
INSIST(zone->raw == NULL);
if (serial == oldserial &&
zone_unchanged(zone->db, db, zone->mctx)) {
dns_zone_log(zone, ISC_LOG_INFO,
"ixfr-from-differences: "
"unchanged");
goto done;
}
serialmin = (oldserial + 1) & 0xffffffffU;
serialmax = (oldserial + 0x7fffffffU) &
0xffffffffU;
dns_zone_log(zone, ISC_LOG_ERROR,
"ixfr-from-differences: "
"new serial (%u) out of range "
"[%u - %u]", serial, serialmin,
serialmax);
result = DNS_R_BADZONE;
goto cleanup;
} else if (!isc_serial_ge(serial, oldserial))
dns_zone_log(zone, ISC_LOG_ERROR,
"zone serial (%u/%u) has gone "
"backwards", serial, oldserial);
else if (serial == oldserial && !hasinclude &&
strcmp(zone->db_argv[0], "_builtin") != 0)
dns_zone_log(zone, ISC_LOG_ERROR,
"zone serial (%u) unchanged. "
"zone may fail to transfer "
"to slaves.", serial);
}
if (zone->type == dns_zone_master &&
(zone->update_acl != NULL || zone->ssutable != NULL) &&
zone->sigresigninginterval < (3 * refresh) &&
dns_db_issecure(db))
{
dns_zone_log(zone, ISC_LOG_WARNING,
"sig-re-signing-interval less than "
"3 * refresh.");
}
zone->refresh = RANGE(refresh,
zone->minrefresh, zone->maxrefresh);
zone->retry = RANGE(retry,
zone->minretry, zone->maxretry);
zone->expire = RANGE(expire, zone->refresh + zone->retry,
DNS_MAX_EXPIRE);
zone->minimum = minimum;
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_HAVETIMERS);
if (zone->type == dns_zone_slave ||
zone->type == dns_zone_stub ||
(zone->type == dns_zone_redirect &&
zone->masters != NULL)) {
isc_time_t t;
uint32_t delay;
result = isc_file_getmodtime(zone->journal, &t);
if (result != ISC_R_SUCCESS)
result = isc_file_getmodtime(zone->masterfile,
&t);
if (result == ISC_R_SUCCESS)
DNS_ZONE_TIME_ADD(&t, zone->expire,
&zone->expiretime);
else
DNS_ZONE_TIME_ADD(&now, zone->retry,
&zone->expiretime);
delay = isc_random_jitter(zone->retry,
(zone->retry * 3) / 4);
DNS_ZONE_TIME_ADD(&now, delay, &zone->refreshtime);
if (isc_time_compare(&zone->refreshtime,
&zone->expiretime) >= 0)
zone->refreshtime = now;
}
break;
case dns_zone_key:
result = sync_keyzone(zone, db);
if (result != ISC_R_SUCCESS)
goto cleanup;
break;
default:
UNEXPECTED_ERROR(__FILE__, __LINE__,
"unexpected zone type %d", zone->type);
result = ISC_R_UNEXPECTED;
goto cleanup;
}
/*
* Check for weak DNSKEY's.
*/
if (zone->type == dns_zone_master)
zone_check_dnskeys(zone, db);
/*
* Schedule DNSSEC key refresh.
*/
if (zone->type == dns_zone_master &&
DNS_ZONEKEY_OPTION(zone, DNS_ZONEKEY_MAINTAIN))
zone->refreshkeytime = now;
#if 0
/* destroy notification example. */
{
isc_event_t *e = isc_event_allocate(zone->mctx, NULL,
DNS_EVENT_DBDESTROYED,
dns_zonemgr_dbdestroyed,
zone,
sizeof(isc_event_t));
dns_db_ondestroy(db, zone->task, &e);
}
#endif
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_write);
if (zone->db != NULL) {
result = zone_replacedb(zone, db, false);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_write);
if (result != ISC_R_SUCCESS)
goto cleanup;
} else {
result = dns_db_rpz_ready(db);
if (result != ISC_R_SUCCESS)
goto cleanup;
zone_attachdb(zone, db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_write);
DNS_ZONE_SETFLAG(zone,
DNS_ZONEFLG_LOADED|
DNS_ZONEFLG_NEEDSTARTUPNOTIFY);
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_SENDSECURE) &&
inline_raw(zone))
{
if (zone->secure->db == NULL)
zone_send_securedb(zone, db);
else
zone_send_secureserial(zone, serial);
}
}
/*
* Finished loading inline-signing zone; need to get status
* from the raw side now.
*/
if (zone->type == dns_zone_master && inline_secure(zone))
maybe_send_secure(zone);
result = ISC_R_SUCCESS;
if (needdump) {
if (zone->type == dns_zone_key)
zone_needdump(zone, 30);
else
zone_needdump(zone, DNS_DUMP_DELAY);
}
if (zone->task != NULL) {
if (zone->type == dns_zone_master) {
set_resigntime(zone);
resume_signingwithkey(zone);
resume_addnsec3chain(zone);
}
if (zone->type == dns_zone_master &&
!DNS_ZONEKEY_OPTION(zone, DNS_ZONEKEY_NORESIGN) &&
dns_zone_isdynamic(zone, false) &&
dns_db_issecure(db)) {
dns_name_t *name;
dns_fixedname_t fixed;
dns_rdataset_t next;
dns_rdataset_init(&next);
name = dns_fixedname_initname(&fixed);
result = dns_db_getsigningtime(db, &next, name);
if (result == ISC_R_SUCCESS) {
isc_stdtime_t timenow;
char namebuf[DNS_NAME_FORMATSIZE];
char typebuf[DNS_RDATATYPE_FORMATSIZE];
isc_stdtime_get(&timenow);
dns_name_format(name, namebuf, sizeof(namebuf));
dns_rdatatype_format(next.covers,
typebuf, sizeof(typebuf));
dns_zone_log(zone, ISC_LOG_DEBUG(3),
"next resign: %s/%s in %d seconds",
namebuf, typebuf,
next.resign - timenow -
zone->sigresigninginterval);
dns_rdataset_disassociate(&next);
} else
dns_zone_log(zone, ISC_LOG_WARNING,
"signed dynamic zone has no "
"resign event scheduled");
}
zone_settimer(zone, &now);
}
/*
* Clear old include list.
*/
for (inc = ISC_LIST_HEAD(zone->includes);
inc != NULL;
inc = ISC_LIST_HEAD(zone->includes)) {
ISC_LIST_UNLINK(zone->includes, inc, link);
isc_mem_free(zone->mctx, inc->name);
isc_mem_put(zone->mctx, inc, sizeof(*inc));
}
zone->nincludes = 0;
/*
* Transfer new include list.
*/
for (inc = ISC_LIST_HEAD(zone->newincludes);
inc != NULL;
inc = ISC_LIST_HEAD(zone->newincludes)) {
ISC_LIST_UNLINK(zone->newincludes, inc, link);
ISC_LIST_APPEND(zone->includes, inc, link);
zone->nincludes++;
}
if (! dns_db_ispersistent(db))
dns_zone_log(zone, ISC_LOG_INFO, "loaded serial %u%s", serial,
dns_db_issecure(db) ? " (DNSSEC signed)" : "");
zone->loadtime = loadtime;
goto done;
cleanup:
for (inc = ISC_LIST_HEAD(zone->newincludes);
inc != NULL;
inc = ISC_LIST_HEAD(zone->newincludes)) {
ISC_LIST_UNLINK(zone->newincludes, inc, link);
isc_mem_free(zone->mctx, inc->name);
isc_mem_put(zone->mctx, inc, sizeof(*inc));
}
if (zone->type == dns_zone_slave ||
zone->type == dns_zone_stub ||
zone->type == dns_zone_key ||
(zone->type == dns_zone_redirect && zone->masters != NULL)) {
if (result != ISC_R_NOMEMORY) {
if (zone->journal != NULL)
zone_saveunique(zone, zone->journal,
"jn-XXXXXXXX");
if (zone->masterfile != NULL)
zone_saveunique(zone, zone->masterfile,
"db-XXXXXXXX");
}
/* Mark the zone for immediate refresh. */
zone->refreshtime = now;
if (zone->task != NULL)
zone_settimer(zone, &now);
result = ISC_R_SUCCESS;
} else if (zone->type == dns_zone_master ||
zone->type == dns_zone_redirect) {
if (!(inline_secure(zone) && result == ISC_R_FILENOTFOUND))
dns_zone_log(zone, ISC_LOG_ERROR,
"not loaded due to errors.");
else if (zone->type == dns_zone_master)
result = ISC_R_SUCCESS;
}
done:
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_LOADPENDING);
/*
* If this is an inline-signed zone and we were called for the raw
* zone, we need to clear DNS_ZONEFLG_LOADPENDING for the secure zone
* as well, but only if this is a reload, not an initial zone load: in
* the former case, zone_postload() will not be run for the secure
* zone; in the latter case, it will be. Check which case we are
* dealing with by consulting the DNS_ZONEFLG_LOADED flag for the
* secure zone: if it is set, this must be a reload.
*/
if (inline_raw(zone) &&
DNS_ZONE_FLAG(zone->secure, DNS_ZONEFLG_LOADED))
{
DNS_ZONE_CLRFLAG(zone->secure, DNS_ZONEFLG_LOADPENDING);
/*
* Re-start zone maintenance if it had been stalled
* due to DNS_ZONEFLG_LOADPENDING being set when
* zone_maintenance was called.
*/
if (zone->secure->task != NULL) {
zone_settimer(zone->secure, &now);
}
}
return (result);
}
static bool
exit_check(dns_zone_t *zone) {
REQUIRE(LOCKED_ZONE(zone));
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_SHUTDOWN) && zone->irefs == 0) {
/*
* DNS_ZONEFLG_SHUTDOWN can only be set if erefs == 0.
*/
INSIST(isc_refcount_current(&zone->erefs) == 0);
return (true);
}
return (false);
}
static bool
zone_check_ns(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *version,
dns_name_t *name, bool logit)
{
isc_result_t result;
char namebuf[DNS_NAME_FORMATSIZE];
char altbuf[DNS_NAME_FORMATSIZE];
dns_fixedname_t fixed;
dns_name_t *foundname;
int level;
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_NOCHECKNS))
return (true);
if (zone->type == dns_zone_master)
level = ISC_LOG_ERROR;
else
level = ISC_LOG_WARNING;
foundname = dns_fixedname_initname(&fixed);
result = dns_db_find(db, name, version, dns_rdatatype_a,
0, 0, NULL, foundname, NULL, NULL);
if (result == ISC_R_SUCCESS)
return (true);
if (result == DNS_R_NXRRSET) {
result = dns_db_find(db, name, version, dns_rdatatype_aaaa,
0, 0, NULL, foundname, NULL, NULL);
if (result == ISC_R_SUCCESS)
return (true);
}
if (result == DNS_R_NXRRSET || result == DNS_R_NXDOMAIN ||
result == DNS_R_EMPTYNAME) {
if (logit) {
dns_name_format(name, namebuf, sizeof namebuf);
dns_zone_log(zone, level, "NS '%s' has no address "
"records (A or AAAA)", namebuf);
}
return (false);
}
if (result == DNS_R_CNAME) {
if (logit) {
dns_name_format(name, namebuf, sizeof namebuf);
dns_zone_log(zone, level, "NS '%s' is a CNAME "
"(illegal)", namebuf);
}
return (false);
}
if (result == DNS_R_DNAME) {
if (logit) {
dns_name_format(name, namebuf, sizeof namebuf);
dns_name_format(foundname, altbuf, sizeof altbuf);
dns_zone_log(zone, level, "NS '%s' is below a DNAME "
"'%s' (illegal)", namebuf, altbuf);
}
return (false);
}
return (true);
}
static isc_result_t
zone_count_ns_rr(dns_zone_t *zone, dns_db_t *db, dns_dbnode_t *node,
dns_dbversion_t *version, unsigned int *nscount,
unsigned int *errors, bool logit)
{
isc_result_t result;
unsigned int count = 0;
unsigned int ecount = 0;
dns_rdataset_t rdataset;
dns_rdata_t rdata;
dns_rdata_ns_t ns;
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(db, node, version, dns_rdatatype_ns,
dns_rdatatype_none, 0, &rdataset, NULL);
if (result == ISC_R_NOTFOUND) {
INSIST(!dns_rdataset_isassociated(&rdataset));
goto success;
}
if (result != ISC_R_SUCCESS) {
INSIST(!dns_rdataset_isassociated(&rdataset));
goto invalidate_rdataset;
}
result = dns_rdataset_first(&rdataset);
while (result == ISC_R_SUCCESS) {
if (errors != NULL && zone->rdclass == dns_rdataclass_in &&
(zone->type == dns_zone_master ||
zone->type == dns_zone_slave)) {
dns_rdata_init(&rdata);
dns_rdataset_current(&rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &ns, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (dns_name_issubdomain(&ns.name, &zone->origin) &&
!zone_check_ns(zone, db, version, &ns.name, logit))
ecount++;
}
count++;
result = dns_rdataset_next(&rdataset);
}
dns_rdataset_disassociate(&rdataset);
success:
if (nscount != NULL)
*nscount = count;
if (errors != NULL)
*errors = ecount;
result = ISC_R_SUCCESS;
invalidate_rdataset:
dns_rdataset_invalidate(&rdataset);
return (result);
}
static isc_result_t
zone_load_soa_rr(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
unsigned int *soacount,
uint32_t *serial, uint32_t *refresh,
uint32_t *retry, uint32_t *expire,
uint32_t *minimum)
{
isc_result_t result;
unsigned int count;
dns_rdataset_t rdataset;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdata_soa_t soa;
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(db, node, version, dns_rdatatype_soa,
dns_rdatatype_none, 0, &rdataset, NULL);
if (result == ISC_R_NOTFOUND) {
INSIST(!dns_rdataset_isassociated(&rdataset));
if (soacount != NULL)
*soacount = 0;
if (serial != NULL)
*serial = 0;
if (refresh != NULL)
*refresh = 0;
if (retry != NULL)
*retry = 0;
if (expire != NULL)
*expire = 0;
if (minimum != NULL)
*minimum = 0;
result = ISC_R_SUCCESS;
goto invalidate_rdataset;
}
if (result != ISC_R_SUCCESS) {
INSIST(!dns_rdataset_isassociated(&rdataset));
goto invalidate_rdataset;
}
count = 0;
result = dns_rdataset_first(&rdataset);
while (result == ISC_R_SUCCESS) {
dns_rdata_init(&rdata);
dns_rdataset_current(&rdataset, &rdata);
count++;
if (count == 1) {
result = dns_rdata_tostruct(&rdata, &soa, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
}
result = dns_rdataset_next(&rdataset);
dns_rdata_reset(&rdata);
}
dns_rdataset_disassociate(&rdataset);
if (soacount != NULL)
*soacount = count;
if (count > 0) {
if (serial != NULL)
*serial = soa.serial;
if (refresh != NULL)
*refresh = soa.refresh;
if (retry != NULL)
*retry = soa.retry;
if (expire != NULL)
*expire = soa.expire;
if (minimum != NULL)
*minimum = soa.minimum;
} else {
if (soacount != NULL)
*soacount = 0;
if (serial != NULL)
*serial = 0;
if (refresh != NULL)
*refresh = 0;
if (retry != NULL)
*retry = 0;
if (expire != NULL)
*expire = 0;
if (minimum != NULL)
*minimum = 0;
}
result = ISC_R_SUCCESS;
invalidate_rdataset:
dns_rdataset_invalidate(&rdataset);
return (result);
}
/*
* zone must be locked.
*/
static isc_result_t
zone_get_from_db(dns_zone_t *zone, dns_db_t *db, unsigned int *nscount,
unsigned int *soacount, uint32_t *serial,
uint32_t *refresh, uint32_t *retry,
uint32_t *expire, uint32_t *minimum,
unsigned int *errors)
{
isc_result_t result;
isc_result_t answer = ISC_R_SUCCESS;
dns_dbversion_t *version = NULL;
dns_dbnode_t *node;
REQUIRE(db != NULL);
REQUIRE(zone != NULL);
dns_db_currentversion(db, &version);
if (nscount != NULL)
*nscount = 0;
if (soacount != NULL)
*soacount = 0;
if (serial != NULL)
*serial = 0;
if (refresh != NULL)
*refresh = 0;
if (retry != NULL)
*retry = 0;
if (expire != NULL)
*expire = 0;
if (errors != NULL)
*errors = 0;
node = NULL;
result = dns_db_findnode(db, &zone->origin, false, &node);
if (result != ISC_R_SUCCESS) {
answer = result;
goto closeversion;
}
if (nscount != NULL || errors != NULL) {
result = zone_count_ns_rr(zone, db, node, version,
nscount, errors, true);
if (result != ISC_R_SUCCESS)
answer = result;
}
if (soacount != NULL || serial != NULL || refresh != NULL
|| retry != NULL || expire != NULL || minimum != NULL) {
result = zone_load_soa_rr(db, node, version, soacount,
serial, refresh, retry, expire,
minimum);
if (result != ISC_R_SUCCESS)
answer = result;
}
dns_db_detachnode(db, &node);
closeversion:
dns_db_closeversion(db, &version, false);
return (answer);
}
void
dns_zone_attach(dns_zone_t *source, dns_zone_t **target) {
REQUIRE(DNS_ZONE_VALID(source));
REQUIRE(target != NULL && *target == NULL);
isc_refcount_increment(&source->erefs, NULL);
*target = source;
}
void
dns_zone_detach(dns_zone_t **zonep) {
dns_zone_t *zone;
dns_zone_t *raw = NULL;
dns_zone_t *secure = NULL;
unsigned int refs;
bool free_now = false;
REQUIRE(zonep != NULL && DNS_ZONE_VALID(*zonep));
zone = *zonep;
isc_refcount_decrement(&zone->erefs, &refs);
if (refs == 0) {
LOCK_ZONE(zone);
INSIST(zone != zone->raw);
/*
* We just detached the last external reference.
*/
if (zone->task != NULL) {
/*
* This zone is being managed. Post
* its control event and let it clean
* up synchronously in the context of
* its task.
*/
isc_event_t *ev = &zone->ctlevent;
isc_task_send(zone->task, &ev);
} else {
/*
* This zone is not being managed; it has
* no task and can have no outstanding
* events. Free it immediately.
*/
/*
* Unmanaged zones should not have non-null views;
* we have no way of detaching from the view here
* without causing deadlock because this code is called
* with the view already locked.
*/
INSIST(zone->view == NULL);
free_now = true;
raw = zone->raw;
zone->raw = NULL;
secure = zone->secure;
zone->secure = NULL;
}
UNLOCK_ZONE(zone);
}
*zonep = NULL;
if (free_now) {
if (raw != NULL)
dns_zone_detach(&raw);
if (secure != NULL)
dns_zone_idetach(&secure);
zone_free(zone);
}
}
void
dns_zone_iattach(dns_zone_t *source, dns_zone_t **target) {
REQUIRE(DNS_ZONE_VALID(source));
REQUIRE(target != NULL && *target == NULL);
LOCK_ZONE(source);
zone_iattach(source, target);
UNLOCK_ZONE(source);
}
static void
zone_iattach(dns_zone_t *source, dns_zone_t **target) {
/*
* 'source' locked by caller.
*/
REQUIRE(LOCKED_ZONE(source));
REQUIRE(DNS_ZONE_VALID(source));
REQUIRE(target != NULL && *target == NULL);
INSIST(source->irefs + isc_refcount_current(&source->erefs) > 0);
source->irefs++;
INSIST(source->irefs != 0);
*target = source;
}
static void
zone_idetach(dns_zone_t **zonep) {
dns_zone_t *zone;
/*
* 'zone' locked by caller.
*/
REQUIRE(zonep != NULL && DNS_ZONE_VALID(*zonep));
zone = *zonep;
REQUIRE(LOCKED_ZONE(*zonep));
*zonep = NULL;
INSIST(zone->irefs > 0);
zone->irefs--;
INSIST(zone->irefs + isc_refcount_current(&zone->erefs) > 0);
}
void
dns_zone_idetach(dns_zone_t **zonep) {
dns_zone_t *zone;
bool free_needed;
REQUIRE(zonep != NULL && DNS_ZONE_VALID(*zonep));
zone = *zonep;
*zonep = NULL;
LOCK_ZONE(zone);
INSIST(zone->irefs > 0);
zone->irefs--;
free_needed = exit_check(zone);
UNLOCK_ZONE(zone);
if (free_needed)
zone_free(zone);
}
isc_mem_t *
dns_zone_getmctx(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->mctx);
}
dns_zonemgr_t *
dns_zone_getmgr(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->zmgr);
}
void
dns_zone_setflag(dns_zone_t *zone, unsigned int flags, bool value) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (value)
DNS_ZONE_SETFLAG(zone, flags);
else
DNS_ZONE_CLRFLAG(zone, flags);
UNLOCK_ZONE(zone);
}
void
dns_zone_setoption(dns_zone_t *zone, unsigned int option,
bool value)
{
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (value)
zone->options |= option;
else
zone->options &= ~option;
UNLOCK_ZONE(zone);
}
void
dns_zone_setoption2(dns_zone_t *zone, unsigned int option,
bool value)
{
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (value)
zone->options2 |= option;
else
zone->options2 &= ~option;
UNLOCK_ZONE(zone);
}
unsigned int
dns_zone_getoptions(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->options);
}
unsigned int
dns_zone_getoptions2(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->options2);
}
void
dns_zone_setkeyopt(dns_zone_t *zone, unsigned int keyopt, bool value)
{
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (value)
zone->keyopts |= keyopt;
else
zone->keyopts &= ~keyopt;
UNLOCK_ZONE(zone);
}
unsigned int
dns_zone_getkeyopts(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->keyopts);
}
isc_result_t
dns_zone_setxfrsource4(dns_zone_t *zone, const isc_sockaddr_t *xfrsource) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->xfrsource4 = *xfrsource;
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_sockaddr_t *
dns_zone_getxfrsource4(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (&zone->xfrsource4);
}
isc_result_t
dns_zone_setxfrsource4dscp(dns_zone_t *zone, isc_dscp_t dscp) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->xfrsource4dscp = dscp;
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_dscp_t
dns_zone_getxfrsource4dscp(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->xfrsource4dscp);
}
isc_result_t
dns_zone_setxfrsource6(dns_zone_t *zone, const isc_sockaddr_t *xfrsource) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->xfrsource6 = *xfrsource;
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_sockaddr_t *
dns_zone_getxfrsource6(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (&zone->xfrsource6);
}
isc_dscp_t
dns_zone_getxfrsource6dscp(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->xfrsource6dscp);
}
isc_result_t
dns_zone_setxfrsource6dscp(dns_zone_t *zone, isc_dscp_t dscp) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->xfrsource6dscp = dscp;
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_result_t
dns_zone_setaltxfrsource4(dns_zone_t *zone,
const isc_sockaddr_t *altxfrsource)
{
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->altxfrsource4 = *altxfrsource;
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_sockaddr_t *
dns_zone_getaltxfrsource4(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (&zone->altxfrsource4);
}
isc_result_t
dns_zone_setaltxfrsource4dscp(dns_zone_t *zone, isc_dscp_t dscp) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->altxfrsource4dscp = dscp;
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_dscp_t
dns_zone_getaltxfrsource4dscp(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->altxfrsource4dscp);
}
isc_result_t
dns_zone_setaltxfrsource6(dns_zone_t *zone,
const isc_sockaddr_t *altxfrsource)
{
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->altxfrsource6 = *altxfrsource;
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_sockaddr_t *
dns_zone_getaltxfrsource6(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (&zone->altxfrsource6);
}
isc_result_t
dns_zone_setaltxfrsource6dscp(dns_zone_t *zone, isc_dscp_t dscp) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->altxfrsource6dscp = dscp;
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_dscp_t
dns_zone_getaltxfrsource6dscp(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->altxfrsource6dscp);
}
isc_result_t
dns_zone_setnotifysrc4(dns_zone_t *zone, const isc_sockaddr_t *notifysrc) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->notifysrc4 = *notifysrc;
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_sockaddr_t *
dns_zone_getnotifysrc4(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (&zone->notifysrc4);
}
isc_result_t
dns_zone_setnotifysrc4dscp(dns_zone_t *zone, isc_dscp_t dscp) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->notifysrc4dscp = dscp;
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_dscp_t
dns_zone_getnotifysrc4dscp(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->notifysrc4dscp);
}
isc_result_t
dns_zone_setnotifysrc6(dns_zone_t *zone, const isc_sockaddr_t *notifysrc) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->notifysrc6 = *notifysrc;
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_sockaddr_t *
dns_zone_getnotifysrc6(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (&zone->notifysrc6);
}
static bool
same_addrs(isc_sockaddr_t const *oldlist, isc_sockaddr_t const *newlist,
uint32_t count)
{
unsigned int i;
for (i = 0; i < count; i++)
if (!isc_sockaddr_equal(&oldlist[i], &newlist[i]))
return (false);
return (true);
}
static bool
same_keynames(dns_name_t * const *oldlist, dns_name_t * const *newlist,
uint32_t count)
{
unsigned int i;
if (oldlist == NULL && newlist == NULL)
return (true);
if (oldlist == NULL || newlist == NULL)
return (false);
for (i = 0; i < count; i++) {
if (oldlist[i] == NULL && newlist[i] == NULL)
continue;
if (oldlist[i] == NULL || newlist[i] == NULL ||
!dns_name_equal(oldlist[i], newlist[i]))
return (false);
}
return (true);
}
static void
clear_addresskeylist(isc_sockaddr_t **addrsp, isc_dscp_t **dscpsp,
dns_name_t ***keynamesp, unsigned int *countp,
isc_mem_t *mctx)
{
unsigned int count;
isc_sockaddr_t *addrs;
isc_dscp_t *dscps;
dns_name_t **keynames;
REQUIRE(countp != NULL && addrsp != NULL && dscpsp != NULL &&
keynamesp != NULL);
count = *countp;
*countp = 0;
addrs = *addrsp;
*addrsp = NULL;
dscps = *dscpsp;
*dscpsp = NULL;
keynames = *keynamesp;
*keynamesp = NULL;
if (addrs != NULL)
isc_mem_put(mctx, addrs, count * sizeof(isc_sockaddr_t));
if (dscps != NULL)
isc_mem_put(mctx, dscps, count * sizeof(isc_dscp_t));
if (keynames != NULL) {
unsigned int i;
for (i = 0; i < count; i++) {
if (keynames[i] != NULL) {
dns_name_free(keynames[i], mctx);
isc_mem_put(mctx, keynames[i],
sizeof(dns_name_t));
keynames[i] = NULL;
}
}
isc_mem_put(mctx, keynames, count * sizeof(dns_name_t *));
}
}
static isc_result_t
set_addrkeylist(unsigned int count,
const isc_sockaddr_t *addrs, isc_sockaddr_t **newaddrsp,
const isc_dscp_t *dscp, isc_dscp_t **newdscpp,
dns_name_t **names, dns_name_t ***newnamesp,
isc_mem_t *mctx)
{
isc_result_t result;
isc_sockaddr_t *newaddrs = NULL;
isc_dscp_t *newdscp = NULL;
dns_name_t **newnames = NULL;
unsigned int i;
REQUIRE(newaddrsp != NULL && *newaddrsp == NULL);
REQUIRE(newdscpp != NULL && *newdscpp == NULL);
REQUIRE(newnamesp != NULL && *newnamesp == NULL);
newaddrs = isc_mem_get(mctx, count * sizeof(*newaddrs));
if (newaddrs == NULL)
return (ISC_R_NOMEMORY);
memmove(newaddrs, addrs, count * sizeof(*newaddrs));
if (dscp != NULL) {
newdscp = isc_mem_get(mctx, count * sizeof(*newdscp));
if (newdscp == NULL) {
isc_mem_put(mctx, newaddrs, count * sizeof(*newaddrs));
return (ISC_R_NOMEMORY);
}
memmove(newdscp, dscp, count * sizeof(*newdscp));
} else
newdscp = NULL;
if (names != NULL) {
newnames = isc_mem_get(mctx, count * sizeof(*newnames));
if (newnames == NULL) {
if (newdscp != NULL)
isc_mem_put(mctx, newdscp,
count * sizeof(*newdscp));
isc_mem_put(mctx, newaddrs, count * sizeof(*newaddrs));
return (ISC_R_NOMEMORY);
}
for (i = 0; i < count; i++)
newnames[i] = NULL;
for (i = 0; i < count; i++) {
if (names[i] != NULL) {
newnames[i] = isc_mem_get(mctx,
sizeof(dns_name_t));
if (newnames[i] == NULL)
goto allocfail;
dns_name_init(newnames[i], NULL);
result = dns_name_dup(names[i], mctx,
newnames[i]);
if (result != ISC_R_SUCCESS) {
allocfail:
for (i = 0; i < count; i++)
if (newnames[i] != NULL)
dns_name_free(
newnames[i],
mctx);
isc_mem_put(mctx, newaddrs,
count * sizeof(*newaddrs));
isc_mem_put(mctx, newdscp,
count * sizeof(*newdscp));
isc_mem_put(mctx, newnames,
count * sizeof(*newnames));
return (ISC_R_NOMEMORY);
}
}
}
} else
newnames = NULL;
*newdscpp = newdscp;
*newaddrsp = newaddrs;
*newnamesp = newnames;
return (ISC_R_SUCCESS);
}
isc_result_t
dns_zone_setnotifysrc6dscp(dns_zone_t *zone, isc_dscp_t dscp) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->notifysrc6dscp = dscp;
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_dscp_t
dns_zone_getnotifysrc6dscp(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->notifysrc6dscp);
}
isc_result_t
dns_zone_setalsonotify(dns_zone_t *zone, const isc_sockaddr_t *notify,
uint32_t count)
{
return (dns_zone_setalsonotifydscpkeys(zone, notify, NULL, NULL,
count));
}
isc_result_t
dns_zone_setalsonotifywithkeys(dns_zone_t *zone, const isc_sockaddr_t *notify,
dns_name_t **keynames, uint32_t count)
{
return (dns_zone_setalsonotifydscpkeys(zone, notify, NULL, keynames,
count));
}
isc_result_t
dns_zone_setalsonotifydscpkeys(dns_zone_t *zone, const isc_sockaddr_t *notify,
const isc_dscp_t *dscps, dns_name_t **keynames,
uint32_t count)
{
isc_result_t result;
isc_sockaddr_t *newaddrs = NULL;
isc_dscp_t *newdscps = NULL;
dns_name_t **newnames = NULL;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(count == 0 || notify != NULL);
if (keynames != NULL)
REQUIRE(count != 0);
LOCK_ZONE(zone);
if (count == zone->notifycnt &&
same_addrs(zone->notify, notify, count) &&
same_keynames(zone->notifykeynames, keynames, count))
goto unlock;
clear_addresskeylist(&zone->notify, &zone->notifydscp,
&zone->notifykeynames, &zone->notifycnt,
zone->mctx);
if (count == 0)
goto unlock;
/*
* Set up the notify and notifykey lists
*/
result = set_addrkeylist(count, notify, &newaddrs, dscps, &newdscps,
keynames, &newnames, zone->mctx);
if (result != ISC_R_SUCCESS)
goto unlock;
/*
* Everything is ok so attach to the zone.
*/
zone->notify = newaddrs;
zone->notifydscp = newdscps;
zone->notifykeynames = newnames;
zone->notifycnt = count;
unlock:
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_result_t
dns_zone_setmasters(dns_zone_t *zone, const isc_sockaddr_t *masters,
uint32_t count)
{
isc_result_t result;
result = dns_zone_setmasterswithkeys(zone, masters, NULL, count);
return (result);
}
isc_result_t
dns_zone_setmasterswithkeys(dns_zone_t *zone,
const isc_sockaddr_t *masters,
dns_name_t **keynames,
uint32_t count)
{
isc_result_t result = ISC_R_SUCCESS;
isc_sockaddr_t *newaddrs = NULL;
isc_dscp_t *newdscps = NULL;
dns_name_t **newnames = NULL;
bool *newok;
unsigned int i;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(count == 0 || masters != NULL);
if (keynames != NULL) {
REQUIRE(count != 0);
}
LOCK_ZONE(zone);
/*
* The refresh code assumes that 'masters' wouldn't change under it.
* If it will change then kill off any current refresh in progress
* and update the masters info. If it won't change then we can just
* unlock and exit.
*/
if (count != zone->masterscnt ||
!same_addrs(zone->masters, masters, count) ||
!same_keynames(zone->masterkeynames, keynames, count)) {
if (zone->request != NULL)
dns_request_cancel(zone->request);
} else
goto unlock;
/*
* This needs to happen before clear_addresskeylist() sets
* zone->masterscnt to 0:
*/
if (zone->mastersok != NULL) {
isc_mem_put(zone->mctx, zone->mastersok,
zone->masterscnt * sizeof(bool));
zone->mastersok = NULL;
}
clear_addresskeylist(&zone->masters, &zone->masterdscps,
&zone->masterkeynames, &zone->masterscnt,
zone->mctx);
/*
* If count == 0, don't allocate any space for masters, mastersok or
* keynames so internally, those pointers are NULL if count == 0
*/
if (count == 0)
goto unlock;
/*
* mastersok must contain count elements
*/
newok = isc_mem_get(zone->mctx, count * sizeof(*newok));
if (newok == NULL) {
result = ISC_R_NOMEMORY;
isc_mem_put(zone->mctx, newaddrs, count * sizeof(*newaddrs));
goto unlock;
};
for (i = 0; i < count; i++)
newok[i] = false;
/*
* Now set up the masters and masterkey lists
*/
result = set_addrkeylist(count, masters, &newaddrs, NULL, &newdscps,
keynames, &newnames, zone->mctx);
INSIST(newdscps == NULL);
if (result != ISC_R_SUCCESS) {
isc_mem_put(zone->mctx, newok, count * sizeof(*newok));
goto unlock;
}
/*
* Everything is ok so attach to the zone.
*/
zone->curmaster = 0;
zone->mastersok = newok;
zone->masters = newaddrs;
zone->masterdscps = newdscps;
zone->masterkeynames = newnames;
zone->masterscnt = count;
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NOMASTERS);
unlock:
UNLOCK_ZONE(zone);
return (result);
}
isc_result_t
dns_zone_getdb(dns_zone_t *zone, dns_db_t **dpb) {
isc_result_t result = ISC_R_SUCCESS;
REQUIRE(DNS_ZONE_VALID(zone));
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db == NULL)
result = DNS_R_NOTLOADED;
else
dns_db_attach(zone->db, dpb);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
return (result);
}
void
dns_zone_setdb(dns_zone_t *zone, dns_db_t *db) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(zone->type == dns_zone_staticstub);
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_write);
REQUIRE(zone->db == NULL);
dns_db_attach(db, &zone->db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_write);
}
/*
* Coordinates the starting of routine jobs.
*/
void
dns_zone_maintenance(dns_zone_t *zone) {
const char me[] = "dns_zone_maintenance";
isc_time_t now;
REQUIRE(DNS_ZONE_VALID(zone));
ENTER;
LOCK_ZONE(zone);
TIME_NOW(&now);
zone_settimer(zone, &now);
UNLOCK_ZONE(zone);
}
static inline bool
was_dumping(dns_zone_t *zone) {
REQUIRE(LOCKED_ZONE(zone));
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DUMPING)) {
return (true);
}
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_DUMPING);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDDUMP);
isc_time_settoepoch(&zone->dumptime);
return (false);
}
/*%
* Find up to 'maxkeys' DNSSEC keys used for signing version 'ver' of database
* 'db' for zone 'zone' in its key directory, then load these keys into 'keys'.
* Only load the public part of a given key if it is not active at timestamp
* 'now'. Store the number of keys found in 'nkeys'.
*/
isc_result_t
dns__zone_findkeys(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *ver,
isc_stdtime_t now, isc_mem_t *mctx, unsigned int maxkeys,
dst_key_t **keys, unsigned int *nkeys)
{
isc_result_t result;
dns_dbnode_t *node = NULL;
const char *directory = dns_zone_getkeydirectory(zone);
CHECK(dns_db_findnode(db, dns_db_origin(db), false, &node));
memset(keys, 0, sizeof(*keys) * maxkeys);
result = dns_dnssec_findzonekeys3(db, ver, node, dns_db_origin(db),
directory, now, mctx, maxkeys, keys,
nkeys);
if (result == ISC_R_NOTFOUND)
result = ISC_R_SUCCESS;
failure:
if (node != NULL)
dns_db_detachnode(db, &node);
return (result);
}
static isc_result_t
offline(dns_db_t *db, dns_dbversion_t *ver, dns__zonediff_t *zonediff,
dns_name_t *name, dns_ttl_t ttl, dns_rdata_t *rdata)
{
isc_result_t result;
if ((rdata->flags & DNS_RDATA_OFFLINE) != 0)
return (ISC_R_SUCCESS);
result = update_one_rr(db, ver, zonediff->diff, DNS_DIFFOP_DELRESIGN,
name, ttl, rdata);
if (result != ISC_R_SUCCESS)
return (result);
rdata->flags |= DNS_RDATA_OFFLINE;
result = update_one_rr(db, ver, zonediff->diff, DNS_DIFFOP_ADDRESIGN,
name, ttl, rdata);
zonediff->offline = true;
return (result);
}
static void
set_key_expiry_warning(dns_zone_t *zone, isc_stdtime_t when, isc_stdtime_t now)
{
unsigned int delta;
char timebuf[80];
zone->key_expiry = when;
if (when <= now) {
dns_zone_log(zone, ISC_LOG_ERROR,
"DNSKEY RRSIG(s) have expired");
isc_time_settoepoch(&zone->keywarntime);
} else if (when < now + 7 * 24 * 3600) {
isc_time_t t;
isc_time_set(&t, when, 0);
isc_time_formattimestamp(&t, timebuf, 80);
dns_zone_log(zone, ISC_LOG_WARNING,
"DNSKEY RRSIG(s) will expire within 7 days: %s",
timebuf);
delta = when - now;
delta--; /* loop prevention */
delta /= 24 * 3600; /* to whole days */
delta *= 24 * 3600; /* to seconds */
isc_time_set(&zone->keywarntime, when - delta, 0);
} else {
isc_time_set(&zone->keywarntime, when - 7 * 24 * 3600, 0);
isc_time_formattimestamp(&zone->keywarntime, timebuf, 80);
dns_zone_log(zone, ISC_LOG_NOTICE,
"setting keywarntime to %s", timebuf);
}
}
/*
* Helper function to del_sigs(). We don't want to delete RRSIGs that
* have no new key.
*/
static bool
delsig_ok(dns_rdata_rrsig_t *rrsig_ptr, dst_key_t **keys, unsigned int nkeys,
bool *warn)
{
unsigned int i = 0;
bool have_ksk = false, have_zsk = false;
bool have_pksk = false, have_pzsk = false;
for (i = 0; i < nkeys; i++) {
if (rrsig_ptr->algorithm != dst_key_alg(keys[i]))
continue;
if (dst_key_isprivate(keys[i])) {
if (KSK(keys[i]))
have_ksk = have_pksk = true;
else
have_zsk = have_pzsk = true;
} else {
if (KSK(keys[i]))
have_ksk = true;
else
have_zsk = true;
}
}
if (have_zsk && have_ksk && !have_pzsk)
*warn = true;
/*
* It's okay to delete a signature if there is an active key
* with the same algorithm to replace it.
*/
if (have_pksk || have_pzsk)
return (true);
/*
* Failing that, it is *not* okay to delete a signature
* if the associated public key is still in the DNSKEY RRset
*/
for (i = 0; i < nkeys; i++) {
if ((rrsig_ptr->algorithm == dst_key_alg(keys[i])) &&
(rrsig_ptr->keyid == dst_key_id(keys[i])))
return (false);
}
/*
* But if the key is gone, then go ahead.
*/
return (true);
}
/*
* Delete expired RRsigs and any RRsigs we are about to re-sign.
* See also update.c:del_keysigs().
*/
static isc_result_t
del_sigs(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *ver, dns_name_t *name,
dns_rdatatype_t type, dns__zonediff_t *zonediff, dst_key_t **keys,
unsigned int nkeys, isc_stdtime_t now, bool incremental)
{
isc_result_t result;
dns_dbnode_t *node = NULL;
dns_rdataset_t rdataset;
unsigned int i;
dns_rdata_rrsig_t rrsig;
bool found;
int64_t timewarn = 0, timemaybe = 0;
dns_rdataset_init(&rdataset);
if (type == dns_rdatatype_nsec3)
result = dns_db_findnsec3node(db, name, false, &node);
else
result = dns_db_findnode(db, name, false, &node);
if (result == ISC_R_NOTFOUND)
return (ISC_R_SUCCESS);
if (result != ISC_R_SUCCESS)
goto failure;
result = dns_db_findrdataset(db, node, ver, dns_rdatatype_rrsig, type,
(isc_stdtime_t) 0, &rdataset, NULL);
dns_db_detachnode(db, &node);
if (result == ISC_R_NOTFOUND) {
INSIST(!dns_rdataset_isassociated(&rdataset));
return (ISC_R_SUCCESS);
}
if (result != ISC_R_SUCCESS) {
INSIST(!dns_rdataset_isassociated(&rdataset));
goto failure;
}
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset)) {
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_current(&rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &rrsig, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (type != dns_rdatatype_dnskey) {
bool warn = false, deleted = false;
if (delsig_ok(&rrsig, keys, nkeys, &warn)) {
result = update_one_rr(db, ver, zonediff->diff,
DNS_DIFFOP_DELRESIGN, name,
rdataset.ttl, &rdata);
if (result != ISC_R_SUCCESS)
break;
deleted = true;
}
if (warn) {
/*
* At this point, we've got an RRSIG,
* which is signed by an inactive key.
* An administrator needs to provide a new
* key/alg, but until that time, we want to
* keep the old RRSIG. Marking the key as
* offline will prevent us spinning waiting
* for the private part.
*/
if (incremental && !deleted) {
result = offline(db, ver, zonediff,
name, rdataset.ttl,
&rdata);
if (result != ISC_R_SUCCESS)
break;
}
/*
* Log the key id and algorithm of
* the inactive key with no replacement
*/
if (zone->log_key_expired_timer <= now) {
char origin[DNS_NAME_FORMATSIZE];
char algbuf[DNS_NAME_FORMATSIZE];
dns_name_format(&zone->origin, origin,
sizeof(origin));
dns_secalg_format(rrsig.algorithm,
algbuf,
sizeof(algbuf));
dns_zone_log(zone, ISC_LOG_WARNING,
"Key %s/%s/%d "
"missing or inactive "
"and has no replacement: "
"retaining signatures.",
origin, algbuf,
rrsig.keyid);
zone->log_key_expired_timer = now +
3600;
}
}
continue;
}
/*
* RRSIG(DNSKEY) requires special processing.
*/
found = false;
for (i = 0; i < nkeys; i++) {
if (rrsig.algorithm == dst_key_alg(keys[i]) &&
rrsig.keyid == dst_key_id(keys[i])) {
found = true;
/*
* Mark offline RRSIG(DNSKEY).
* We want the earliest offline expire time
* iff there is a new offline signature.
*/
if (!dst_key_inactive(keys[i]) &&
!dst_key_isprivate(keys[i]))
{
int64_t timeexpire =
dns_time64_from32(rrsig.timeexpire);
if (timewarn != 0 &&
timewarn > timeexpire)
timewarn = timeexpire;
if (rdata.flags & DNS_RDATA_OFFLINE) {
if (timemaybe == 0 ||
timemaybe > timeexpire)
timemaybe = timeexpire;
break;
}
if (timewarn == 0)
timewarn = timemaybe;
if (timewarn == 0 ||
timewarn > timeexpire)
timewarn = timeexpire;
result = offline(db, ver, zonediff,
name, rdataset.ttl,
&rdata);
break;
}
result = update_one_rr(db, ver, zonediff->diff,
DNS_DIFFOP_DELRESIGN,
name, rdataset.ttl,
&rdata);
break;
}
}
/*
* If there is not a matching DNSKEY then
* delete the RRSIG.
*/
if (!found) {
result = update_one_rr(db, ver, zonediff->diff,
DNS_DIFFOP_DELRESIGN, name,
rdataset.ttl, &rdata);
}
if (result != ISC_R_SUCCESS)
break;
}
dns_rdataset_disassociate(&rdataset);
if (result == ISC_R_NOMORE)
result = ISC_R_SUCCESS;
if (timewarn > 0) {
isc_stdtime_t stdwarn = (isc_stdtime_t)timewarn;
if (timewarn == stdwarn) {
set_key_expiry_warning(zone, (isc_stdtime_t)timewarn,
now);
} else {
dns_zone_log(zone, ISC_LOG_ERROR,
"key expiry warning time out of range");
}
}
failure:
if (node != NULL)
dns_db_detachnode(db, &node);
return (result);
}
static isc_result_t
add_sigs(dns_db_t *db, dns_dbversion_t *ver, dns_name_t *name,
dns_rdatatype_t type, dns_diff_t *diff, dst_key_t **keys,
unsigned int nkeys, isc_mem_t *mctx, isc_stdtime_t inception,
isc_stdtime_t expire, bool check_ksk,
bool keyset_kskonly)
{
isc_result_t result;
dns_dbnode_t *node = NULL;
dns_rdataset_t rdataset;
dns_rdata_t sig_rdata = DNS_RDATA_INIT;
unsigned char data[1024]; /* XXX */
isc_buffer_t buffer;
unsigned int i, j;
dns_rdataset_init(&rdataset);
isc_buffer_init(&buffer, data, sizeof(data));
if (type == dns_rdatatype_nsec3)
result = dns_db_findnsec3node(db, name, false, &node);
else
result = dns_db_findnode(db, name, false, &node);
if (result == ISC_R_NOTFOUND)
return (ISC_R_SUCCESS);
if (result != ISC_R_SUCCESS)
goto failure;
result = dns_db_findrdataset(db, node, ver, type, 0,
(isc_stdtime_t) 0, &rdataset, NULL);
dns_db_detachnode(db, &node);
if (result == ISC_R_NOTFOUND) {
INSIST(!dns_rdataset_isassociated(&rdataset));
return (ISC_R_SUCCESS);
}
if (result != ISC_R_SUCCESS) {
INSIST(!dns_rdataset_isassociated(&rdataset));
goto failure;
}
for (i = 0; i < nkeys; i++) {
bool both = false;
/* Don't add signatures for offline or inactive keys */
if (!dst_key_isprivate(keys[i])) {
continue;
}
if (dst_key_inactive(keys[i])) {
continue;
}
if (check_ksk && !REVOKE(keys[i])) {
bool have_ksk, have_nonksk;
if (KSK(keys[i])) {
have_ksk = true;
have_nonksk = false;
} else {
have_ksk = false;
have_nonksk = true;
}
for (j = 0; j < nkeys; j++) {
if (j == i || ALG(keys[i]) != ALG(keys[j])) {
continue;
}
/* Don't consider inactive keys, however
* the key may be temporary offline, so do
* consider keys which private key files are
* unavailable.
*/
if (dst_key_inactive(keys[j])) {
continue;
}
if (REVOKE(keys[j])) {
continue;
}
if (KSK(keys[j])) {
have_ksk = true;
} else {
have_nonksk = true;
}
both = have_ksk && have_nonksk;
if (both) {
break;
}
}
}
if (both) {
if (type == dns_rdatatype_dnskey) {
if (!KSK(keys[i]) && keyset_kskonly)
continue;
} else if (KSK(keys[i]))
continue;
} else if (REVOKE(keys[i]) && type != dns_rdatatype_dnskey)
continue;
/* Calculate the signature, creating a RRSIG RDATA. */
isc_buffer_clear(&buffer);
CHECK(dns_dnssec_sign(name, &rdataset, keys[i],
&inception, &expire,
mctx, &buffer, &sig_rdata));
/* Update the database and journal with the RRSIG. */
/* XXX inefficient - will cause dataset merging */
CHECK(update_one_rr(db, ver, diff, DNS_DIFFOP_ADDRESIGN,
name, rdataset.ttl, &sig_rdata));
dns_rdata_reset(&sig_rdata);
isc_buffer_init(&buffer, data, sizeof(data));
}
failure:
if (dns_rdataset_isassociated(&rdataset))
dns_rdataset_disassociate(&rdataset);
if (node != NULL)
dns_db_detachnode(db, &node);
return (result);
}
static void
zone_resigninc(dns_zone_t *zone) {
const char *me = "zone_resigninc";
dns_db_t *db = NULL;
dns_dbversion_t *version = NULL;
dns_diff_t _sig_diff;
dns__zonediff_t zonediff;
dns_fixedname_t fixed;
dns_name_t *name;
dns_rdataset_t rdataset;
dns_rdatatype_t covers;
dst_key_t *zone_keys[DNS_MAXZONEKEYS];
bool check_ksk, keyset_kskonly = false;
isc_result_t result;
isc_stdtime_t now, inception, soaexpire, expire, fullexpire, stop;
uint32_t sigvalidityinterval, expiryinterval;
unsigned int i;
unsigned int nkeys = 0;
unsigned int resign;
ENTER;
dns_rdataset_init(&rdataset);
dns_diff_init(zone->mctx, &_sig_diff);
zonediff_init(&zonediff, &_sig_diff);
/*
* Zone is frozen or automatic resigning is disabled.
* Pause for 5 minutes.
*/
if (zone->update_disabled ||
DNS_ZONEKEY_OPTION(zone, DNS_ZONEKEY_NORESIGN))
{
result = ISC_R_FAILURE;
goto failure;
}
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
dns_db_attach(zone->db, &db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
result = dns_db_newversion(db, &version);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_resigninc:dns_db_newversion -> %s",
dns_result_totext(result));
goto failure;
}
isc_stdtime_get(&now);
result = dns__zone_findkeys(zone, db, version, now, zone->mctx,
DNS_MAXZONEKEYS, zone_keys, &nkeys);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_resigninc:dns__zone_findkeys -> %s",
dns_result_totext(result));
goto failure;
}
sigvalidityinterval = zone->sigvalidityinterval;
inception = now - 3600; /* Allow for clock skew. */
soaexpire = now + sigvalidityinterval;
expiryinterval = dns_zone_getsigresigninginterval(zone);
if (expiryinterval > sigvalidityinterval) {
expiryinterval = sigvalidityinterval;
} else {
expiryinterval = sigvalidityinterval - expiryinterval;
}
/*
* Spread out signatures over time if they happen to be
* clumped. We don't do this for each add_sigs() call as
* we still want some clustering to occur. In normal operations
* the records should be re-signed as they fall due and they should
* already be spread out. However if the server is off for a
* period we need to ensure that the clusters don't become
* synchronised by using the full jitter range.
*/
if (sigvalidityinterval >= 3600U) {
uint32_t normaljitter, fulljitter;
isc_random_get(&normaljitter);
isc_random_get(&fulljitter);
if (sigvalidityinterval > 7200U) {
normaljitter %= 3600;
fulljitter %= expiryinterval;
} else {
normaljitter %= 1200;
fulljitter %= 1200;
}
expire = soaexpire - normaljitter - 1;
fullexpire = soaexpire - fulljitter - 1;
} else {
expire = fullexpire = soaexpire - 1;
}
stop = now + 5;
check_ksk = DNS_ZONE_OPTION(zone, DNS_ZONEOPT_UPDATECHECKKSK);
keyset_kskonly = DNS_ZONE_OPTION(zone, DNS_ZONEOPT_DNSKEYKSKONLY);
name = dns_fixedname_initname(&fixed);
result = dns_db_getsigningtime(db, &rdataset, name);
if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_resigninc:dns_db_getsigningtime -> %s",
dns_result_totext(result));
}
i = 0;
while (result == ISC_R_SUCCESS) {
resign = rdataset.resign - zone->sigresigninginterval;
covers = rdataset.covers;
dns_rdataset_disassociate(&rdataset);
/*
* Stop if we hit the SOA as that means we have walked the
* entire zone. The SOA record should always be the most
* recent signature.
*/
/* XXXMPA increase number of RRsets signed pre call */
if (covers == dns_rdatatype_soa || i++ > zone->signatures ||
resign > stop)
break;
result = del_sigs(zone, db, version, name, covers, &zonediff,
zone_keys, nkeys, now, true);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_resigninc:del_sigs -> %s",
dns_result_totext(result));
break;
}
/*
* If re-signing is over 5 minutes late use 'fullexpire'
* to redistribute the signature over the complete
* re-signing window, otherwise only add a small amount
* of jitter.
*/
result = add_sigs(db, version, name, covers, zonediff.diff,
zone_keys, nkeys, zone->mctx, inception,
resign > (now - 300) ? expire : fullexpire,
check_ksk, keyset_kskonly);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_resigninc:add_sigs -> %s",
dns_result_totext(result));
break;
}
result = dns_db_getsigningtime(db, &rdataset, name);
if (nkeys == 0 && result == ISC_R_NOTFOUND) {
result = ISC_R_SUCCESS;
break;
}
if (result != ISC_R_SUCCESS)
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_resigninc:dns_db_getsigningtime -> %s",
dns_result_totext(result));
}
if (result != ISC_R_NOMORE && result != ISC_R_SUCCESS)
goto failure;
result = del_sigs(zone, db, version, &zone->origin, dns_rdatatype_soa,
&zonediff, zone_keys, nkeys, now, true);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_resigninc:del_sigs -> %s",
dns_result_totext(result));
goto failure;
}
/*
* Did we change anything in the zone?
*/
if (ISC_LIST_EMPTY(zonediff.diff->tuples)) {
/*
* Commit the changes if any key has been marked as offline.
*/
if (zonediff.offline)
dns_db_closeversion(db, &version, true);
goto failure;
}
/* Increment SOA serial if we have made changes */
result = update_soa_serial(db, version, zonediff.diff, zone->mctx,
zone->updatemethod);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_resigninc:update_soa_serial -> %s",
dns_result_totext(result));
goto failure;
}
/*
* Generate maximum life time signatures so that the above loop
* termination is sensible.
*/
result = add_sigs(db, version, &zone->origin, dns_rdatatype_soa,
zonediff.diff, zone_keys, nkeys, zone->mctx,
inception, soaexpire, check_ksk, keyset_kskonly);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_resigninc:add_sigs -> %s",
dns_result_totext(result));
goto failure;
}
/* Write changes to journal file. */
CHECK(zone_journal(zone, zonediff.diff, NULL, "zone_resigninc"));
/* Everything has succeeded. Commit the changes. */
dns_db_closeversion(db, &version, true);
failure:
dns_diff_clear(&_sig_diff);
for (i = 0; i < nkeys; i++)
dst_key_free(&zone_keys[i]);
if (version != NULL) {
dns_db_closeversion(db, &version, false);
dns_db_detach(&db);
} else if (db != NULL) {
dns_db_detach(&db);
}
LOCK_ZONE(zone);
if (result == ISC_R_SUCCESS) {
set_resigntime(zone);
zone_needdump(zone, DNS_DUMP_DELAY);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDNOTIFY);
} else {
/*
* Something failed. Retry in 5 minutes.
*/
isc_interval_t ival;
isc_interval_set(&ival, 300, 0);
isc_time_nowplusinterval(&zone->resigntime, &ival);
}
UNLOCK_ZONE(zone);
INSIST(version == NULL);
}
static isc_result_t
next_active(dns_db_t *db, dns_dbversion_t *version, dns_name_t *oldname,
dns_name_t *newname, bool bottom)
{
isc_result_t result;
dns_dbiterator_t *dbit = NULL;
dns_rdatasetiter_t *rdsit = NULL;
dns_dbnode_t *node = NULL;
CHECK(dns_db_createiterator(db, DNS_DB_NONSEC3, &dbit));
CHECK(dns_dbiterator_seek(dbit, oldname));
do {
result = dns_dbiterator_next(dbit);
if (result == ISC_R_NOMORE)
CHECK(dns_dbiterator_first(dbit));
CHECK(dns_dbiterator_current(dbit, &node, newname));
if (bottom && dns_name_issubdomain(newname, oldname) &&
!dns_name_equal(newname, oldname)) {
dns_db_detachnode(db, &node);
continue;
}
/*
* Is this node empty?
*/
CHECK(dns_db_allrdatasets(db, node, version, 0, &rdsit));
result = dns_rdatasetiter_first(rdsit);
dns_db_detachnode(db, &node);
dns_rdatasetiter_destroy(&rdsit);
if (result != ISC_R_NOMORE)
break;
} while (1);
failure:
if (node != NULL)
dns_db_detachnode(db, &node);
if (dbit != NULL)
dns_dbiterator_destroy(&dbit);
return (result);
}
static bool
signed_with_key(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
dns_rdatatype_t type, dst_key_t *key)
{
isc_result_t result;
dns_rdataset_t rdataset;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdata_rrsig_t rrsig;
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(db, node, version, dns_rdatatype_rrsig,
type, 0, &rdataset, NULL);
if (result != ISC_R_SUCCESS) {
INSIST(!dns_rdataset_isassociated(&rdataset));
return (false);
}
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset)) {
dns_rdataset_current(&rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &rrsig, NULL);
INSIST(result == ISC_R_SUCCESS);
if (rrsig.algorithm == dst_key_alg(key) &&
rrsig.keyid == dst_key_id(key)) {
dns_rdataset_disassociate(&rdataset);
return (true);
}
dns_rdata_reset(&rdata);
}
dns_rdataset_disassociate(&rdataset);
return (false);
}
static isc_result_t
add_nsec(dns_db_t *db, dns_dbversion_t *version, dns_name_t *name,
dns_dbnode_t *node, dns_ttl_t ttl, bool bottom,
dns_diff_t *diff)
{
dns_fixedname_t fixed;
dns_name_t *next;
dns_rdata_t rdata = DNS_RDATA_INIT;
isc_result_t result;
unsigned char nsecbuffer[DNS_NSEC_BUFFERSIZE];
next = dns_fixedname_initname(&fixed);
CHECK(next_active(db, version, name, next, bottom));
CHECK(dns_nsec_buildrdata(db, version, node, next, nsecbuffer,
&rdata));
CHECK(update_one_rr(db, version, diff, DNS_DIFFOP_ADD, name, ttl,
&rdata));
failure:
return (result);
}
static isc_result_t
check_if_bottom_of_zone(dns_db_t *db, dns_dbnode_t *node,
dns_dbversion_t *version, bool *is_bottom_of_zone)
{
isc_result_t result;
dns_rdatasetiter_t *iterator = NULL;
dns_rdataset_t rdataset;
bool seen_soa = false, seen_ns = false, seen_dname = false;
REQUIRE(is_bottom_of_zone != NULL);
result = dns_db_allrdatasets(db, node, version, 0, &iterator);
if (result != ISC_R_SUCCESS) {
if (result == ISC_R_NOTFOUND) {
result = ISC_R_SUCCESS;
}
return (result);
}
dns_rdataset_init(&rdataset);
for (result = dns_rdatasetiter_first(iterator);
result == ISC_R_SUCCESS;
result = dns_rdatasetiter_next(iterator)) {
dns_rdatasetiter_current(iterator, &rdataset);
switch (rdataset.type) {
case dns_rdatatype_soa:
seen_soa = true;
break;
case dns_rdatatype_ns:
seen_ns = true;
break;
case dns_rdatatype_dname:
seen_dname = true;
break;
}
dns_rdataset_disassociate(&rdataset);
}
if (result != ISC_R_NOMORE) {
goto failure;
}
if ((seen_ns && !seen_soa) || seen_dname) {
*is_bottom_of_zone = true;
}
result = ISC_R_SUCCESS;
failure:
dns_rdatasetiter_destroy(&iterator);
return (result);
}
static isc_result_t
sign_a_node(dns_db_t *db, dns_name_t *name, dns_dbnode_t *node,
dns_dbversion_t *version, bool build_nsec3,
bool build_nsec, dst_key_t *key,
isc_stdtime_t inception, isc_stdtime_t expire,
unsigned int minimum, bool is_ksk,
bool keyset_kskonly, bool is_bottom_of_zone,
dns_diff_t *diff, int32_t *signatures, isc_mem_t *mctx)
{
isc_result_t result;
dns_rdatasetiter_t *iterator = NULL;
dns_rdataset_t rdataset;
dns_rdata_t rdata = DNS_RDATA_INIT;
isc_buffer_t buffer;
unsigned char data[1024];
bool seen_soa, seen_ns, seen_rr, seen_nsec, seen_nsec3, seen_ds;
result = dns_db_allrdatasets(db, node, version, 0, &iterator);
if (result != ISC_R_SUCCESS) {
if (result == ISC_R_NOTFOUND)
result = ISC_R_SUCCESS;
return (result);
}
dns_rdataset_init(&rdataset);
isc_buffer_init(&buffer, data, sizeof(data));
seen_rr = seen_soa = seen_ns = seen_nsec = seen_nsec3 = seen_ds = false;
for (result = dns_rdatasetiter_first(iterator);
result == ISC_R_SUCCESS;
result = dns_rdatasetiter_next(iterator)) {
dns_rdatasetiter_current(iterator, &rdataset);
if (rdataset.type == dns_rdatatype_soa)
seen_soa = true;
else if (rdataset.type == dns_rdatatype_ns)
seen_ns = true;
else if (rdataset.type == dns_rdatatype_ds)
seen_ds = true;
else if (rdataset.type == dns_rdatatype_nsec)
seen_nsec = true;
else if (rdataset.type == dns_rdatatype_nsec3)
seen_nsec3 = true;
if (rdataset.type != dns_rdatatype_rrsig)
seen_rr = true;
dns_rdataset_disassociate(&rdataset);
}
if (result != ISC_R_NOMORE)
goto failure;
/*
* Going from insecure to NSEC3.
* Don't generate NSEC3 records for NSEC3 records.
*/
if (build_nsec3 && !seen_nsec3 && seen_rr) {
bool unsecure = !seen_ds && seen_ns && !seen_soa;
CHECK(dns_nsec3_addnsec3s(db, version, name, minimum,
unsecure, diff));
(*signatures)--;
}
/*
* Going from insecure to NSEC.
* Don't generate NSEC records for NSEC3 records.
*/
if (build_nsec && !seen_nsec3 && !seen_nsec && seen_rr) {
/*
* Build a NSEC record except at the origin.
*/
if (!dns_name_equal(name, dns_db_origin(db))) {
CHECK(add_nsec(db, version, name, node, minimum,
is_bottom_of_zone, diff));
/* Count a NSEC generation as a signature generation. */
(*signatures)--;
}
}
result = dns_rdatasetiter_first(iterator);
while (result == ISC_R_SUCCESS) {
dns_rdatasetiter_current(iterator, &rdataset);
if (rdataset.type == dns_rdatatype_soa ||
rdataset.type == dns_rdatatype_rrsig)
goto next_rdataset;
if (rdataset.type == dns_rdatatype_dnskey) {
if (!is_ksk && keyset_kskonly)
goto next_rdataset;
} else if (is_ksk) {
/*
* CDS and CDNSKEY are signed with KSK (RFC 7344, 4.1).
*/
if (rdataset.type != dns_rdatatype_cds &&
rdataset.type != dns_rdatatype_cdnskey)
goto next_rdataset;
}
if (seen_ns && !seen_soa &&
rdataset.type != dns_rdatatype_ds &&
rdataset.type != dns_rdatatype_nsec)
goto next_rdataset;
if (signed_with_key(db, node, version, rdataset.type, key))
goto next_rdataset;
/* Calculate the signature, creating a RRSIG RDATA. */
isc_buffer_clear(&buffer);
CHECK(dns_dnssec_sign(name, &rdataset, key, &inception,
&expire, mctx, &buffer, &rdata));
/* Update the database and journal with the RRSIG. */
/* XXX inefficient - will cause dataset merging */
CHECK(update_one_rr(db, version, diff, DNS_DIFFOP_ADDRESIGN,
name, rdataset.ttl, &rdata));
dns_rdata_reset(&rdata);
(*signatures)--;
next_rdataset:
dns_rdataset_disassociate(&rdataset);
result = dns_rdatasetiter_next(iterator);
}
if (result == ISC_R_NOMORE)
result = ISC_R_SUCCESS;
failure:
if (dns_rdataset_isassociated(&rdataset))
dns_rdataset_disassociate(&rdataset);
if (iterator != NULL)
dns_rdatasetiter_destroy(&iterator);
return (result);
}
/*
* If 'update_only' is set then don't create a NSEC RRset if it doesn't exist.
*/
static isc_result_t
updatesecure(dns_db_t *db, dns_dbversion_t *version, dns_name_t *name,
dns_ttl_t minimum, bool update_only, dns_diff_t *diff)
{
isc_result_t result;
dns_rdataset_t rdataset;
dns_dbnode_t *node = NULL;
CHECK(dns_db_getoriginnode(db, &node));
if (update_only) {
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(db, node, version,
dns_rdatatype_nsec,
dns_rdatatype_none,
0, &rdataset, NULL);
if (dns_rdataset_isassociated(&rdataset))
dns_rdataset_disassociate(&rdataset);
if (result == ISC_R_NOTFOUND)
goto success;
if (result != ISC_R_SUCCESS)
goto failure;
}
CHECK(delete_nsec(db, version, node, name, diff));
CHECK(add_nsec(db, version, name, node, minimum, false, diff));
success:
result = ISC_R_SUCCESS;
failure:
if (node != NULL)
dns_db_detachnode(db, &node);
return (result);
}
static isc_result_t
updatesignwithkey(dns_zone_t *zone, dns_signing_t *signing,
dns_dbversion_t *version, bool build_nsec3,
dns_ttl_t minimum, dns_diff_t *diff)
{
isc_result_t result;
dns_dbnode_t *node = NULL;
dns_rdataset_t rdataset;
dns_rdata_t rdata = DNS_RDATA_INIT;
unsigned char data[5];
bool seen_done = false;
bool have_rr = false;
dns_rdataset_init(&rdataset);
result = dns_db_getoriginnode(signing->db, &node);
if (result != ISC_R_SUCCESS)
goto failure;
result = dns_db_findrdataset(signing->db, node, version,
zone->privatetype, dns_rdatatype_none,
0, &rdataset, NULL);
if (result == ISC_R_NOTFOUND) {
INSIST(!dns_rdataset_isassociated(&rdataset));
result = ISC_R_SUCCESS;
goto failure;
}
if (result != ISC_R_SUCCESS) {
INSIST(!dns_rdataset_isassociated(&rdataset));
goto failure;
}
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset)) {
dns_rdataset_current(&rdataset, &rdata);
/*
* If we don't match the algorithm or keyid skip the record.
*/
if (rdata.length != 5 ||
rdata.data[0] != signing->algorithm ||
rdata.data[1] != ((signing->keyid >> 8) & 0xff) ||
rdata.data[2] != (signing->keyid & 0xff)) {
have_rr = true;
dns_rdata_reset(&rdata);
continue;
}
/*
* We have a match. If we were signing (!signing->deleteit)
* and we already have a record indicating that we have
* finished signing (rdata.data[4] != 0) then keep it.
* Otherwise it needs to be deleted as we have removed all
* the signatures (signing->deleteit), so any record indicating
* completion is now out of date, or we have finished signing
* with the new record so we no longer need to remember that
* we need to sign the zone with the matching key across a
* nameserver re-start.
*/
if (!signing->deleteit && rdata.data[4] != 0) {
seen_done = true;
have_rr = true;
} else
CHECK(update_one_rr(signing->db, version, diff,
DNS_DIFFOP_DEL, &zone->origin,
rdataset.ttl, &rdata));
dns_rdata_reset(&rdata);
}
if (result == ISC_R_NOMORE)
result = ISC_R_SUCCESS;
if (!signing->deleteit && !seen_done) {
/*
* If we were signing then we need to indicate that we have
* finished signing the zone with this key. If it is already
* there we don't need to add it a second time.
*/
data[0] = signing->algorithm;
data[1] = (signing->keyid >> 8) & 0xff;
data[2] = signing->keyid & 0xff;
data[3] = 0;
data[4] = 1;
rdata.length = sizeof(data);
rdata.data = data;
rdata.type = zone->privatetype;
rdata.rdclass = dns_db_class(signing->db);
CHECK(update_one_rr(signing->db, version, diff, DNS_DIFFOP_ADD,
&zone->origin, rdataset.ttl, &rdata));
} else if (!have_rr) {
dns_name_t *origin = dns_db_origin(signing->db);
/*
* Rebuild the NSEC/NSEC3 record for the origin as we no
* longer have any private records.
*/
if (build_nsec3)
CHECK(dns_nsec3_addnsec3s(signing->db, version, origin,
minimum, false, diff));
CHECK(updatesecure(signing->db, version, origin, minimum,
true, diff));
}
failure:
if (dns_rdataset_isassociated(&rdataset))
dns_rdataset_disassociate(&rdataset);
if (node != NULL)
dns_db_detachnode(signing->db, &node);
return (result);
}
/*
* Called from zone_nsec3chain() in order to update zone records indicating
* processing status of given NSEC3 chain:
*
* - If the supplied dns_nsec3chain_t structure has been fully processed
* (which is indicated by "active" being set to false):
*
* - remove all NSEC3PARAM records matching the relevant NSEC3 chain,
*
* - remove all private-type records containing NSEC3PARAM RDATA matching
* the relevant NSEC3 chain.
*
* - If the supplied dns_nsec3chain_t structure has not been fully processed
* (which is indicated by "active" being set to true), only remove the
* NSEC3PARAM record which matches the relevant NSEC3 chain and has the
* "flags" field set to 0.
*
* - If given NSEC3 chain is being added, add an NSEC3PARAM record contained
* in the relevant private-type record, but with the "flags" field set to
* 0, indicating that this NSEC3 chain is now complete for this zone.
*
* Note that this function is called at different processing stages for NSEC3
* chain additions vs. removals and needs to handle all cases properly.
*/
static isc_result_t
fixup_nsec3param(dns_db_t *db, dns_dbversion_t *ver, dns_nsec3chain_t *chain,
bool active, dns_rdatatype_t privatetype,
dns_diff_t *diff)
{
dns_dbnode_t *node = NULL;
dns_name_t *name = dns_db_origin(db);
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_t rdataset;
dns_rdata_nsec3param_t nsec3param;
isc_result_t result;
isc_buffer_t buffer;
unsigned char parambuf[DNS_NSEC3PARAM_BUFFERSIZE];
dns_ttl_t ttl = 0;
bool nseconly = false, nsec3ok = false;
dns_rdataset_init(&rdataset);
result = dns_db_getoriginnode(db, &node);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
result = dns_db_findrdataset(db, node, ver, dns_rdatatype_nsec3param,
0, 0, &rdataset, NULL);
if (result == ISC_R_NOTFOUND)
goto try_private;
if (result != ISC_R_SUCCESS)
goto failure;
/*
* Preserve the existing ttl.
*/
ttl = rdataset.ttl;
/*
* Delete all NSEC3PARAM records which match that in nsec3chain.
*/
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset)) {
dns_rdataset_current(&rdataset, &rdata);
CHECK(dns_rdata_tostruct(&rdata, &nsec3param, NULL));
if (nsec3param.hash != chain->nsec3param.hash ||
(active && nsec3param.flags != 0) ||
nsec3param.iterations != chain->nsec3param.iterations ||
nsec3param.salt_length != chain->nsec3param.salt_length ||
memcmp(nsec3param.salt, chain->nsec3param.salt,
nsec3param.salt_length)) {
dns_rdata_reset(&rdata);
continue;
}
CHECK(update_one_rr(db, ver, diff, DNS_DIFFOP_DEL,
name, rdataset.ttl, &rdata));
dns_rdata_reset(&rdata);
}
if (result != ISC_R_NOMORE)
goto failure;
dns_rdataset_disassociate(&rdataset);
try_private:
if (active)
goto add;
result = dns_nsec_nseconly(db, ver, &nseconly);
nsec3ok = (result == ISC_R_SUCCESS && !nseconly);
/*
* Delete all private records which match that in nsec3chain.
*/
result = dns_db_findrdataset(db, node, ver, privatetype,
0, 0, &rdataset, NULL);
if (result == ISC_R_NOTFOUND)
goto add;
if (result != ISC_R_SUCCESS)
goto failure;
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset)) {
dns_rdata_t private = DNS_RDATA_INIT;
unsigned char buf[DNS_NSEC3PARAM_BUFFERSIZE];
dns_rdataset_current(&rdataset, &private);
if (!dns_nsec3param_fromprivate(&private, &rdata,
buf, sizeof(buf)))
continue;
CHECK(dns_rdata_tostruct(&rdata, &nsec3param, NULL));
if ((!nsec3ok &&
(nsec3param.flags & DNS_NSEC3FLAG_INITIAL) != 0) ||
nsec3param.hash != chain->nsec3param.hash ||
nsec3param.iterations != chain->nsec3param.iterations ||
nsec3param.salt_length != chain->nsec3param.salt_length ||
memcmp(nsec3param.salt, chain->nsec3param.salt,
nsec3param.salt_length)) {
dns_rdata_reset(&rdata);
continue;
}
CHECK(update_one_rr(db, ver, diff, DNS_DIFFOP_DEL,
name, rdataset.ttl, &private));
dns_rdata_reset(&rdata);
}
if (result != ISC_R_NOMORE)
goto failure;
add:
if ((chain->nsec3param.flags & DNS_NSEC3FLAG_REMOVE) != 0) {
result = ISC_R_SUCCESS;
goto failure;
}
/*
* Add a NSEC3PARAM record which matches that in nsec3chain but
* with all flags bits cleared.
*
* Note: we do not clear chain->nsec3param.flags as this change
* may be reversed.
*/
isc_buffer_init(&buffer, ¶mbuf, sizeof(parambuf));
CHECK(dns_rdata_fromstruct(&rdata, dns_db_class(db),
dns_rdatatype_nsec3param,
&chain->nsec3param, &buffer));
rdata.data[1] = 0; /* Clear flag bits. */
CHECK(update_one_rr(db, ver, diff, DNS_DIFFOP_ADD, name, ttl, &rdata));
failure:
dns_db_detachnode(db, &node);
if (dns_rdataset_isassociated(&rdataset))
dns_rdataset_disassociate(&rdataset);
return (result);
}
static isc_result_t
delete_nsec(dns_db_t *db, dns_dbversion_t *ver, dns_dbnode_t *node,
dns_name_t *name, dns_diff_t *diff)
{
dns_rdataset_t rdataset;
isc_result_t result;
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(db, node, ver, dns_rdatatype_nsec,
0, 0, &rdataset, NULL);
if (result == ISC_R_NOTFOUND)
return (ISC_R_SUCCESS);
if (result != ISC_R_SUCCESS)
return (result);
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset)) {
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_current(&rdataset, &rdata);
CHECK(update_one_rr(db, ver, diff, DNS_DIFFOP_DEL, name,
rdataset.ttl, &rdata));
}
if (result == ISC_R_NOMORE)
result = ISC_R_SUCCESS;
failure:
dns_rdataset_disassociate(&rdataset);
return (result);
}
static isc_result_t
deletematchingnsec3(dns_db_t *db, dns_dbversion_t *ver, dns_dbnode_t *node,
dns_name_t *name, const dns_rdata_nsec3param_t *param,
dns_diff_t *diff)
{
dns_rdataset_t rdataset;
dns_rdata_nsec3_t nsec3;
isc_result_t result;
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(db, node, ver, dns_rdatatype_nsec3,
0, 0, &rdataset, NULL);
if (result == ISC_R_NOTFOUND)
return (ISC_R_SUCCESS);
if (result != ISC_R_SUCCESS)
return (result);
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset)) {
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_current(&rdataset, &rdata);
CHECK(dns_rdata_tostruct(&rdata, &nsec3, NULL));
if (nsec3.hash != param->hash ||
nsec3.iterations != param->iterations ||
nsec3.salt_length != param->salt_length ||
memcmp(nsec3.salt, param->salt, nsec3.salt_length))
continue;
CHECK(update_one_rr(db, ver, diff, DNS_DIFFOP_DEL, name,
rdataset.ttl, &rdata));
}
if (result == ISC_R_NOMORE)
result = ISC_R_SUCCESS;
failure:
dns_rdataset_disassociate(&rdataset);
return (result);
}
static isc_result_t
need_nsec_chain(dns_db_t *db, dns_dbversion_t *ver,
const dns_rdata_nsec3param_t *param,
bool *answer)
{
dns_dbnode_t *node = NULL;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdata_nsec3param_t myparam;
dns_rdataset_t rdataset;
isc_result_t result;
*answer = false;
result = dns_db_getoriginnode(db, &node);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(db, node, ver, dns_rdatatype_nsec,
0, 0, &rdataset, NULL);
if (result == ISC_R_SUCCESS) {
dns_rdataset_disassociate(&rdataset);
dns_db_detachnode(db, &node);
return (result);
}
if (result != ISC_R_NOTFOUND) {
dns_db_detachnode(db, &node);
return (result);
}
result = dns_db_findrdataset(db, node, ver, dns_rdatatype_nsec3param,
0, 0, &rdataset, NULL);
if (result == ISC_R_NOTFOUND) {
*answer = true;
dns_db_detachnode(db, &node);
return (ISC_R_SUCCESS);
}
if (result != ISC_R_SUCCESS) {
dns_db_detachnode(db, &node);
return (result);
}
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset)) {
dns_rdataset_current(&rdataset, &rdata);
CHECK(dns_rdata_tostruct(&rdata, &myparam, NULL));
dns_rdata_reset(&rdata);
/*
* Ignore any NSEC3PARAM removals.
*/
if (NSEC3REMOVE(myparam.flags))
continue;
/*
* Ignore the chain that we are in the process of deleting.
*/
if (myparam.hash == param->hash &&
myparam.iterations == param->iterations &&
myparam.salt_length == param->salt_length &&
!memcmp(myparam.salt, param->salt, myparam.salt_length))
continue;
/*
* Found an active NSEC3 chain.
*/
break;
}
if (result == ISC_R_NOMORE) {
*answer = true;
result = ISC_R_SUCCESS;
}
failure:
if (dns_rdataset_isassociated(&rdataset))
dns_rdataset_disassociate(&rdataset);
dns_db_detachnode(db, &node);
return (result);
}
/*%
* Add/remove DNSSEC signatures for the list of "raw" zone changes supplied in
* 'diff'. Gradually remove tuples from 'diff' and append them to 'zonediff'
* along with tuples representing relevant signature changes.
*/
isc_result_t
dns__zone_updatesigs(dns_diff_t *diff, dns_db_t *db, dns_dbversion_t *version,
dst_key_t *zone_keys[], unsigned int nkeys,
dns_zone_t *zone, isc_stdtime_t inception,
isc_stdtime_t expire, isc_stdtime_t now,
bool check_ksk, bool keyset_kskonly,
dns__zonediff_t *zonediff)
{
dns_difftuple_t *tuple;
isc_result_t result;
for (tuple = ISC_LIST_HEAD(diff->tuples);
tuple != NULL;
tuple = ISC_LIST_HEAD(diff->tuples)) {
result = del_sigs(zone, db, version, &tuple->name,
tuple->rdata.type, zonediff,
zone_keys, nkeys, now, false);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"dns__zone_updatesigs:del_sigs -> %s",
dns_result_totext(result));
return (result);
}
result = add_sigs(db, version, &tuple->name,
tuple->rdata.type, zonediff->diff,
zone_keys, nkeys, zone->mctx, inception,
expire, check_ksk, keyset_kskonly);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"dns__zone_updatesigs:add_sigs -> %s",
dns_result_totext(result));
return (result);
}
do {
dns_difftuple_t *next = ISC_LIST_NEXT(tuple, link);
while (next != NULL &&
(tuple->rdata.type != next->rdata.type ||
!dns_name_equal(&tuple->name, &next->name)))
next = ISC_LIST_NEXT(next, link);
ISC_LIST_UNLINK(diff->tuples, tuple, link);
dns_diff_appendminimal(zonediff->diff, &tuple);
INSIST(tuple == NULL);
tuple = next;
} while (tuple != NULL);
}
return (ISC_R_SUCCESS);
}
/*
* Incrementally build and sign a new NSEC3 chain using the parameters
* requested.
*/
static void
zone_nsec3chain(dns_zone_t *zone) {
const char *me = "zone_nsec3chain";
dns_db_t *db = NULL;
dns_dbnode_t *node = NULL;
dns_dbversion_t *version = NULL;
dns_diff_t _sig_diff;
dns_diff_t nsec_diff;
dns_diff_t nsec3_diff;
dns_diff_t param_diff;
dns__zonediff_t zonediff;
dns_fixedname_t fixed;
dns_fixedname_t nextfixed;
dns_name_t *name, *nextname;
dns_rdataset_t rdataset;
dns_nsec3chain_t *nsec3chain = NULL, *nextnsec3chain;
dns_nsec3chainlist_t cleanup;
dst_key_t *zone_keys[DNS_MAXZONEKEYS];
int32_t signatures;
bool check_ksk, keyset_kskonly;
bool delegation;
bool first;
isc_result_t result;
isc_stdtime_t now, inception, soaexpire, expire;
uint32_t jitter, sigvalidityinterval, expiryinterval;
unsigned int i;
unsigned int nkeys = 0;
uint32_t nodes;
bool unsecure = false;
bool seen_soa, seen_ns, seen_dname, seen_ds;
bool seen_nsec, seen_nsec3, seen_rr;
dns_rdatasetiter_t *iterator = NULL;
bool buildnsecchain;
bool updatensec = false;
dns_rdatatype_t privatetype = zone->privatetype;
ENTER;
dns_rdataset_init(&rdataset);
name = dns_fixedname_initname(&fixed);
nextname = dns_fixedname_initname(&nextfixed);
dns_diff_init(zone->mctx, ¶m_diff);
dns_diff_init(zone->mctx, &nsec3_diff);
dns_diff_init(zone->mctx, &nsec_diff);
dns_diff_init(zone->mctx, &_sig_diff);
zonediff_init(&zonediff, &_sig_diff);
ISC_LIST_INIT(cleanup);
/*
* Updates are disabled. Pause for 5 minutes.
*/
if (zone->update_disabled) {
result = ISC_R_FAILURE;
goto failure;
}
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
/*
* This function is called when zone timer fires, after the latter gets
* set by zone_addnsec3chain(). If the action triggering the call to
* zone_addnsec3chain() is closely followed by a zone deletion request,
* it might turn out that the timer thread will not be woken up until
* after the zone is deleted by rmzone(), which calls dns_db_detach()
* for zone->db, causing the latter to become NULL. Return immediately
* if that happens.
*/
if (zone->db != NULL) {
dns_db_attach(zone->db, &db);
}
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
if (db == NULL) {
return;
}
result = dns_db_newversion(db, &version);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_nsec3chain:dns_db_newversion -> %s",
dns_result_totext(result));
goto failure;
}
isc_stdtime_get(&now);
result = dns__zone_findkeys(zone, db, version, now, zone->mctx,
DNS_MAXZONEKEYS, zone_keys, &nkeys);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_nsec3chain:dns__zone_findkeys -> %s",
dns_result_totext(result));
goto failure;
}
sigvalidityinterval = dns_zone_getsigvalidityinterval(zone);
inception = now - 3600; /* Allow for clock skew. */
soaexpire = now + sigvalidityinterval;
expiryinterval = dns_zone_getsigresigninginterval(zone);
if (expiryinterval > sigvalidityinterval) {
expiryinterval = sigvalidityinterval;
} else {
expiryinterval = sigvalidityinterval - expiryinterval;
}
/*
* Spread out signatures over time if they happen to be
* clumped. We don't do this for each add_sigs() call as
* we still want some clustering to occur.
*/
if (sigvalidityinterval >= 3600U) {
isc_random_get(&jitter);
if (sigvalidityinterval > 7200U) {
jitter %= expiryinterval;
} else {
jitter %= 1200;
}
expire = soaexpire - jitter - 1;
} else {
expire = soaexpire - 1;
}
check_ksk = DNS_ZONE_OPTION(zone, DNS_ZONEOPT_UPDATECHECKKSK);
keyset_kskonly = DNS_ZONE_OPTION(zone, DNS_ZONEOPT_DNSKEYKSKONLY);
/*
* We keep pulling nodes off each iterator in turn until
* we have no more nodes to pull off or we reach the limits
* for this quantum.
*/
nodes = zone->nodes;
signatures = zone->signatures;
LOCK_ZONE(zone);
nsec3chain = ISC_LIST_HEAD(zone->nsec3chain);
UNLOCK_ZONE(zone);
first = true;
if (nsec3chain != NULL)
nsec3chain->save_delete_nsec = nsec3chain->delete_nsec;
/*
* Generate new NSEC3 chains first.
*
* The following while loop iterates over nodes in the zone database,
* updating the NSEC3 chain by calling dns_nsec3_addnsec3() for each of
* them. Once all nodes are processed, the "delete_nsec" field is
* consulted to check whether we are supposed to remove NSEC records
* from the zone database; if so, the database iterator is reset to
* point to the first node and the loop traverses all of them again,
* this time removing NSEC records. If we hit a node which is obscured
* by a delegation or a DNAME, nodes are skipped over until we find one
* that is not obscured by the same obscuring name and then normal
* processing is resumed.
*
* The above is repeated until all requested NSEC3 chain changes are
* applied or when we reach the limits for this quantum, whichever
* happens first.
*
* Note that the "signatures" variable is only used here to limit the
* amount of work performed. Actual DNSSEC signatures are only
* generated by dns__zone_updatesigs() calls later in this function.
*/
while (nsec3chain != NULL && nodes-- > 0 && signatures > 0) {
LOCK_ZONE(zone);
nextnsec3chain = ISC_LIST_NEXT(nsec3chain, link);
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (nsec3chain->done || nsec3chain->db != zone->db) {
ISC_LIST_UNLINK(zone->nsec3chain, nsec3chain, link);
ISC_LIST_APPEND(cleanup, nsec3chain, link);
}
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
UNLOCK_ZONE(zone);
if (ISC_LIST_TAIL(cleanup) == nsec3chain)
goto next_addchain;
/*
* Possible future db.
*/
if (nsec3chain->db != db) {
goto next_addchain;
}
if (NSEC3REMOVE(nsec3chain->nsec3param.flags))
goto next_addchain;
dns_dbiterator_current(nsec3chain->dbiterator, &node, name);
if (nsec3chain->delete_nsec) {
delegation = false;
dns_dbiterator_pause(nsec3chain->dbiterator);
CHECK(delete_nsec(db, version, node, name, &nsec_diff));
goto next_addnode;
}
/*
* On the first pass we need to check if the current node
* has not been obscured.
*/
delegation = false;
unsecure = false;
if (first) {
dns_fixedname_t ffound;
dns_name_t *found;
found = dns_fixedname_initname(&ffound);
result = dns_db_find(db, name, version,
dns_rdatatype_soa,
DNS_DBFIND_NOWILD, 0, NULL, found,
NULL, NULL);
if ((result == DNS_R_DELEGATION ||
result == DNS_R_DNAME) &&
!dns_name_equal(name, found)) {
/*
* Remember the obscuring name so that
* we skip all obscured names.
*/
dns_name_copy(found, name, NULL);
delegation = true;
goto next_addnode;
}
}
/*
* Check to see if this is a bottom of zone node.
*/
result = dns_db_allrdatasets(db, node, version, 0, &iterator);
if (result == ISC_R_NOTFOUND) /* Empty node? */
goto next_addnode;
if (result != ISC_R_SUCCESS)
goto failure;
seen_soa = seen_ns = seen_dname = seen_ds = seen_nsec =
false;
for (result = dns_rdatasetiter_first(iterator);
result == ISC_R_SUCCESS;
result = dns_rdatasetiter_next(iterator)) {
dns_rdatasetiter_current(iterator, &rdataset);
INSIST(rdataset.type != dns_rdatatype_nsec3);
if (rdataset.type == dns_rdatatype_soa)
seen_soa = true;
else if (rdataset.type == dns_rdatatype_ns)
seen_ns = true;
else if (rdataset.type == dns_rdatatype_dname)
seen_dname = true;
else if (rdataset.type == dns_rdatatype_ds)
seen_ds = true;
else if (rdataset.type == dns_rdatatype_nsec)
seen_nsec = true;
dns_rdataset_disassociate(&rdataset);
}
dns_rdatasetiter_destroy(&iterator);
/*
* Is there a NSEC chain than needs to be cleaned up?
*/
if (seen_nsec)
nsec3chain->seen_nsec = true;
if (seen_ns && !seen_soa && !seen_ds)
unsecure = true;
if ((seen_ns && !seen_soa) || seen_dname)
delegation = true;
/*
* Process one node.
*/
dns_dbiterator_pause(nsec3chain->dbiterator);
result = dns_nsec3_addnsec3(db, version, name,
&nsec3chain->nsec3param,
zone->minimum, unsecure,
&nsec3_diff);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:"
"dns_nsec3_addnsec3 -> %s",
dns_result_totext(result));
goto failure;
}
/*
* Treat each call to dns_nsec3_addnsec3() as if it's cost is
* two signatures. Additionally there will, in general, be
* two signature generated below.
*
* If we are only changing the optout flag the cost is half
* that of the cost of generating a completely new chain.
*/
signatures -= 4;
/*
* Go onto next node.
*/
next_addnode:
first = false;
dns_db_detachnode(db, &node);
do {
result = dns_dbiterator_next(nsec3chain->dbiterator);
if (result == ISC_R_NOMORE && nsec3chain->delete_nsec) {
dns_dbiterator_pause(nsec3chain->dbiterator);
CHECK(fixup_nsec3param(db, version, nsec3chain,
false, privatetype,
¶m_diff));
LOCK_ZONE(zone);
ISC_LIST_UNLINK(zone->nsec3chain, nsec3chain,
link);
UNLOCK_ZONE(zone);
ISC_LIST_APPEND(cleanup, nsec3chain, link);
goto next_addchain;
}
if (result == ISC_R_NOMORE) {
dns_dbiterator_pause(nsec3chain->dbiterator);
if (nsec3chain->seen_nsec) {
CHECK(fixup_nsec3param(db, version,
nsec3chain,
true,
privatetype,
¶m_diff));
nsec3chain->delete_nsec = true;
goto same_addchain;
}
CHECK(fixup_nsec3param(db, version, nsec3chain,
false, privatetype,
¶m_diff));
LOCK_ZONE(zone);
ISC_LIST_UNLINK(zone->nsec3chain, nsec3chain,
link);
UNLOCK_ZONE(zone);
ISC_LIST_APPEND(cleanup, nsec3chain, link);
goto next_addchain;
} else if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_nsec3chain:"
"dns_dbiterator_next -> %s",
dns_result_totext(result));
goto failure;
} else if (delegation) {
dns_dbiterator_current(nsec3chain->dbiterator,
&node, nextname);
dns_db_detachnode(db, &node);
if (!dns_name_issubdomain(nextname, name))
break;
} else
break;
} while (1);
continue;
same_addchain:
CHECK(dns_dbiterator_first(nsec3chain->dbiterator));
first = true;
continue;
next_addchain:
dns_dbiterator_pause(nsec3chain->dbiterator);
nsec3chain = nextnsec3chain;
first = true;
if (nsec3chain != NULL)
nsec3chain->save_delete_nsec = nsec3chain->delete_nsec;
}
if (nsec3chain != NULL)
goto skip_removals;
/*
* Process removals.
*
* This is a counterpart of the above while loop which takes care of
* removing an NSEC3 chain. It starts with determining whether the
* zone needs to switch from NSEC3 to NSEC; if so, it first builds an
* NSEC chain by iterating over all nodes in the zone database and only
* then goes on to remove NSEC3 records be iterating over all nodes
* again and calling deletematchingnsec3() for each of them; otherwise,
* it starts removing NSEC3 records immediately. Rules for processing
* obscured nodes and interrupting work are the same as for the while
* loop above.
*/
LOCK_ZONE(zone);
nsec3chain = ISC_LIST_HEAD(zone->nsec3chain);
UNLOCK_ZONE(zone);
first = true;
buildnsecchain = false;
while (nsec3chain != NULL && nodes-- > 0 && signatures > 0) {
LOCK_ZONE(zone);
nextnsec3chain = ISC_LIST_NEXT(nsec3chain, link);
UNLOCK_ZONE(zone);
if (nsec3chain->db != db)
goto next_removechain;
if (!NSEC3REMOVE(nsec3chain->nsec3param.flags))
goto next_removechain;
/*
* Work out if we need to build a NSEC chain as a consequence
* of removing this NSEC3 chain.
*/
if (first && !updatensec &&
(nsec3chain->nsec3param.flags & DNS_NSEC3FLAG_NONSEC) == 0)
{
result = need_nsec_chain(db, version,
&nsec3chain->nsec3param,
&buildnsecchain);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_nsec3chain:"
"need_nsec_chain -> %s",
dns_result_totext(result));
goto failure;
}
}
if (first)
dns_zone_log(zone, ISC_LOG_DEBUG(3), "zone_nsec3chain:"
"buildnsecchain = %u\n", buildnsecchain);
dns_dbiterator_current(nsec3chain->dbiterator, &node, name);
delegation = false;
if (!buildnsecchain) {
/*
* Delete the NSEC3PARAM record matching this chain.
*/
if (first) {
result = fixup_nsec3param(db, version,
nsec3chain,
true, privatetype,
¶m_diff);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_nsec3chain:"
"fixup_nsec3param -> %s",
dns_result_totext(result));
goto failure;
}
}
/*
* Delete the NSEC3 records.
*/
result = deletematchingnsec3(db, version, node, name,
&nsec3chain->nsec3param,
&nsec3_diff);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_nsec3chain:"
"deletematchingnsec3 -> %s",
dns_result_totext(result));
goto failure;
}
goto next_removenode;
}
if (first) {
dns_fixedname_t ffound;
dns_name_t *found;
found = dns_fixedname_initname(&ffound);
result = dns_db_find(db, name, version,
dns_rdatatype_soa,
DNS_DBFIND_NOWILD, 0, NULL, found,
NULL, NULL);
if ((result == DNS_R_DELEGATION ||
result == DNS_R_DNAME) &&
!dns_name_equal(name, found)) {
/*
* Remember the obscuring name so that
* we skip all obscured names.
*/
dns_name_copy(found, name, NULL);
delegation = true;
goto next_removenode;
}
}
/*
* Check to see if this is a bottom of zone node.
*/
result = dns_db_allrdatasets(db, node, version, 0, &iterator);
if (result == ISC_R_NOTFOUND) /* Empty node? */
goto next_removenode;
if (result != ISC_R_SUCCESS)
goto failure;
seen_soa = seen_ns = seen_dname = seen_nsec3 = seen_nsec =
seen_rr = false;
for (result = dns_rdatasetiter_first(iterator);
result == ISC_R_SUCCESS;
result = dns_rdatasetiter_next(iterator)) {
dns_rdatasetiter_current(iterator, &rdataset);
if (rdataset.type == dns_rdatatype_soa)
seen_soa = true;
else if (rdataset.type == dns_rdatatype_ns)
seen_ns = true;
else if (rdataset.type == dns_rdatatype_dname)
seen_dname = true;
else if (rdataset.type == dns_rdatatype_nsec)
seen_nsec = true;
else if (rdataset.type == dns_rdatatype_nsec3)
seen_nsec3 = true;
if (rdataset.type != dns_rdatatype_rrsig)
seen_rr = true;
dns_rdataset_disassociate(&rdataset);
}
dns_rdatasetiter_destroy(&iterator);
if (!seen_rr || seen_nsec3 || seen_nsec)
goto next_removenode;
if ((seen_ns && !seen_soa) || seen_dname)
delegation = true;
/*
* Add a NSEC record except at the origin.
*/
if (!dns_name_equal(name, dns_db_origin(db))) {
dns_dbiterator_pause(nsec3chain->dbiterator);
CHECK(add_nsec(db, version, name, node, zone->minimum,
delegation, &nsec_diff));
signatures--;
}
next_removenode:
first = false;
dns_db_detachnode(db, &node);
do {
result = dns_dbiterator_next(nsec3chain->dbiterator);
if (result == ISC_R_NOMORE && buildnsecchain) {
/*
* The NSEC chain should now be built.
* We can now remove the NSEC3 chain.
*/
updatensec = true;
goto same_removechain;
}
if (result == ISC_R_NOMORE) {
LOCK_ZONE(zone);
ISC_LIST_UNLINK(zone->nsec3chain, nsec3chain,
link);
UNLOCK_ZONE(zone);
ISC_LIST_APPEND(cleanup, nsec3chain, link);
dns_dbiterator_pause(nsec3chain->dbiterator);
result = fixup_nsec3param(db, version,
nsec3chain, false,
privatetype,
¶m_diff);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_nsec3chain:"
"fixup_nsec3param -> %s",
dns_result_totext(result));
goto failure;
}
goto next_removechain;
} else if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_nsec3chain:"
"dns_dbiterator_next -> %s",
dns_result_totext(result));
goto failure;
} else if (delegation) {
dns_dbiterator_current(nsec3chain->dbiterator,
&node, nextname);
dns_db_detachnode(db, &node);
if (!dns_name_issubdomain(nextname, name))
break;
} else
break;
} while (1);
continue;
same_removechain:
CHECK(dns_dbiterator_first(nsec3chain->dbiterator));
buildnsecchain = false;
first = true;
continue;
next_removechain:
dns_dbiterator_pause(nsec3chain->dbiterator);
nsec3chain = nextnsec3chain;
first = true;
}
skip_removals:
/*
* We may need to update the NSEC/NSEC3 records for the zone apex.
*/
if (!ISC_LIST_EMPTY(param_diff.tuples)) {
bool rebuild_nsec = false,
rebuild_nsec3 = false;
result = dns_db_getoriginnode(db, &node);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
result = dns_db_allrdatasets(db, node, version, 0, &iterator);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:"
"dns_db_allrdatasets -> %s",
dns_result_totext(result));
goto failure;
}
for (result = dns_rdatasetiter_first(iterator);
result == ISC_R_SUCCESS;
result = dns_rdatasetiter_next(iterator)) {
dns_rdatasetiter_current(iterator, &rdataset);
if (rdataset.type == dns_rdatatype_nsec)
rebuild_nsec = true;
if (rdataset.type == dns_rdatatype_nsec3param)
rebuild_nsec3 = true;
dns_rdataset_disassociate(&rdataset);
}
dns_rdatasetiter_destroy(&iterator);
dns_db_detachnode(db, &node);
if (rebuild_nsec) {
if (nsec3chain != NULL)
dns_dbiterator_pause(nsec3chain->dbiterator);
result = updatesecure(db, version, &zone->origin,
zone->minimum, true,
&nsec_diff);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_nsec3chain:"
"updatesecure -> %s",
dns_result_totext(result));
goto failure;
}
}
if (rebuild_nsec3) {
if (nsec3chain != NULL)
dns_dbiterator_pause(nsec3chain->dbiterator);
result = dns_nsec3_addnsec3s(db, version,
dns_db_origin(db),
zone->minimum, false,
&nsec3_diff);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_nsec3chain:"
"dns_nsec3_addnsec3s -> %s",
dns_result_totext(result));
goto failure;
}
}
}
/*
* Add / update signatures for the NSEC3 records.
*/
if (nsec3chain != NULL)
dns_dbiterator_pause(nsec3chain->dbiterator);
result = dns__zone_updatesigs(&nsec3_diff, db, version, zone_keys,
nkeys, zone, inception, expire, now,
check_ksk, keyset_kskonly, &zonediff);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:"
"dns__zone_updatesigs -> %s",
dns_result_totext(result));
goto failure;
}
/*
* We have changed the NSEC3PARAM or private RRsets
* above so we need to update the signatures.
*/
result = dns__zone_updatesigs(¶m_diff, db, version, zone_keys,
nkeys, zone, inception, expire, now,
check_ksk, keyset_kskonly, &zonediff);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:"
"dns__zone_updatesigs -> %s",
dns_result_totext(result));
goto failure;
}
if (updatensec) {
result = updatesecure(db, version, &zone->origin,
zone->minimum, false, &nsec_diff);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:"
"updatesecure -> %s",
dns_result_totext(result));
goto failure;
}
}
result = dns__zone_updatesigs(&nsec_diff, db, version, zone_keys,
nkeys, zone, inception, expire, now,
check_ksk, keyset_kskonly, &zonediff);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:"
"dns__zone_updatesigs -> %s",
dns_result_totext(result));
goto failure;
}
/*
* If we made no effective changes to the zone then we can just
* cleanup otherwise we need to increment the serial.
*/
if (ISC_LIST_EMPTY(zonediff.diff->tuples)) {
/*
* No need to call dns_db_closeversion() here as it is
* called with commit = true below.
*/
goto done;
}
result = del_sigs(zone, db, version, &zone->origin, dns_rdatatype_soa,
&zonediff, zone_keys, nkeys, now, false);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:"
"del_sigs -> %s", dns_result_totext(result));
goto failure;
}
result = update_soa_serial(db, version, zonediff.diff, zone->mctx,
zone->updatemethod);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:"
"update_soa_serial -> %s",
dns_result_totext(result));
goto failure;
}
result = add_sigs(db, version, &zone->origin, dns_rdatatype_soa,
zonediff.diff, zone_keys, nkeys, zone->mctx,
inception, soaexpire, check_ksk, keyset_kskonly);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:"
"add_sigs -> %s", dns_result_totext(result));
goto failure;
}
/* Write changes to journal file. */
CHECK(zone_journal(zone, zonediff.diff, NULL, "zone_nsec3chain"));
LOCK_ZONE(zone);
zone_needdump(zone, DNS_DUMP_DELAY);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDNOTIFY);
UNLOCK_ZONE(zone);
done:
/*
* Pause all iterators so that dns_db_closeversion() can succeed.
*/
LOCK_ZONE(zone);
for (nsec3chain = ISC_LIST_HEAD(zone->nsec3chain);
nsec3chain != NULL;
nsec3chain = ISC_LIST_NEXT(nsec3chain, link))
dns_dbiterator_pause(nsec3chain->dbiterator);
UNLOCK_ZONE(zone);
/*
* Everything has succeeded. Commit the changes.
* Unconditionally commit as zonediff.offline not checked above.
*/
dns_db_closeversion(db, &version, true);
/*
* Everything succeeded so we can clean these up now.
*/
nsec3chain = ISC_LIST_HEAD(cleanup);
while (nsec3chain != NULL) {
ISC_LIST_UNLINK(cleanup, nsec3chain, link);
dns_db_detach(&nsec3chain->db);
dns_dbiterator_destroy(&nsec3chain->dbiterator);
isc_mem_put(zone->mctx, nsec3chain, sizeof *nsec3chain);
nsec3chain = ISC_LIST_HEAD(cleanup);
}
LOCK_ZONE(zone);
set_resigntime(zone);
UNLOCK_ZONE(zone);
failure:
if (result != ISC_R_SUCCESS)
dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain: %s",
dns_result_totext(result));
/*
* On error roll back the current nsec3chain.
*/
if (result != ISC_R_SUCCESS && nsec3chain != NULL) {
if (nsec3chain->done) {
dns_db_detach(&nsec3chain->db);
dns_dbiterator_destroy(&nsec3chain->dbiterator);
isc_mem_put(zone->mctx, nsec3chain, sizeof *nsec3chain);
} else {
result = dns_dbiterator_first(nsec3chain->dbiterator);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_dbiterator_pause(nsec3chain->dbiterator);
nsec3chain->delete_nsec = nsec3chain->save_delete_nsec;
}
}
/*
* Rollback the cleanup list.
*/
nsec3chain = ISC_LIST_TAIL(cleanup);
while (nsec3chain != NULL) {
ISC_LIST_UNLINK(cleanup, nsec3chain, link);
if (nsec3chain->done) {
dns_db_detach(&nsec3chain->db);
dns_dbiterator_destroy(&nsec3chain->dbiterator);
isc_mem_put(zone->mctx, nsec3chain, sizeof *nsec3chain);
} else {
LOCK_ZONE(zone);
ISC_LIST_PREPEND(zone->nsec3chain, nsec3chain, link);
UNLOCK_ZONE(zone);
result = dns_dbiterator_first(nsec3chain->dbiterator);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_dbiterator_pause(nsec3chain->dbiterator);
nsec3chain->delete_nsec = nsec3chain->save_delete_nsec;
}
nsec3chain = ISC_LIST_TAIL(cleanup);
}
LOCK_ZONE(zone);
for (nsec3chain = ISC_LIST_HEAD(zone->nsec3chain);
nsec3chain != NULL;
nsec3chain = ISC_LIST_NEXT(nsec3chain, link))
dns_dbiterator_pause(nsec3chain->dbiterator);
UNLOCK_ZONE(zone);
dns_diff_clear(¶m_diff);
dns_diff_clear(&nsec3_diff);
dns_diff_clear(&nsec_diff);
dns_diff_clear(&_sig_diff);
if (iterator != NULL)
dns_rdatasetiter_destroy(&iterator);
for (i = 0; i < nkeys; i++)
dst_key_free(&zone_keys[i]);
if (node != NULL)
dns_db_detachnode(db, &node);
if (version != NULL) {
dns_db_closeversion(db, &version, false);
dns_db_detach(&db);
} else if (db != NULL)
dns_db_detach(&db);
LOCK_ZONE(zone);
if (ISC_LIST_HEAD(zone->nsec3chain) != NULL) {
isc_interval_t interval;
if (zone->update_disabled || result != ISC_R_SUCCESS)
isc_interval_set(&interval, 60, 0); /* 1 minute */
else
isc_interval_set(&interval, 0, 10000000); /* 10 ms */
isc_time_nowplusinterval(&zone->nsec3chaintime, &interval);
} else
isc_time_settoepoch(&zone->nsec3chaintime);
UNLOCK_ZONE(zone);
INSIST(version == NULL);
}
/*%
* Delete all RRSIG records with the given algorithm and keyid.
* Remove the NSEC record and RRSIGs if nkeys is zero.
* If all remaining RRsets are signed with the given algorithm
* set *has_algp to true.
*/
static isc_result_t
del_sig(dns_db_t *db, dns_dbversion_t *version, dns_name_t *name,
dns_dbnode_t *node, unsigned int nkeys, dns_secalg_t algorithm,
uint16_t keyid, bool *has_algp, dns_diff_t *diff)
{
dns_rdata_rrsig_t rrsig;
dns_rdataset_t rdataset;
dns_rdatasetiter_t *iterator = NULL;
isc_result_t result;
bool alg_missed = false;
bool alg_found = false;
char namebuf[DNS_NAME_FORMATSIZE];
dns_name_format(name, namebuf, sizeof(namebuf));
result = dns_db_allrdatasets(db, node, version, 0, &iterator);
if (result != ISC_R_SUCCESS) {
if (result == ISC_R_NOTFOUND)
result = ISC_R_SUCCESS;
return (result);
}
dns_rdataset_init(&rdataset);
for (result = dns_rdatasetiter_first(iterator);
result == ISC_R_SUCCESS;
result = dns_rdatasetiter_next(iterator)) {
bool has_alg = false;
dns_rdatasetiter_current(iterator, &rdataset);
if (nkeys == 0 && rdataset.type == dns_rdatatype_nsec) {
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset)) {
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_current(&rdataset, &rdata);
CHECK(update_one_rr(db, version, diff,
DNS_DIFFOP_DEL, name,
rdataset.ttl, &rdata));
}
if (result != ISC_R_NOMORE)
goto failure;
dns_rdataset_disassociate(&rdataset);
continue;
}
if (rdataset.type != dns_rdatatype_rrsig) {
dns_rdataset_disassociate(&rdataset);
continue;
}
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset))
{
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_current(&rdataset, &rdata);
CHECK(dns_rdata_tostruct(&rdata, &rrsig, NULL));
if (nkeys != 0 &&
(rrsig.algorithm != algorithm ||
rrsig.keyid != keyid))
{
if (rrsig.algorithm == algorithm) {
has_alg = true;
}
continue;
}
CHECK(update_one_rr(db, version, diff,
DNS_DIFFOP_DELRESIGN, name,
rdataset.ttl, &rdata));
}
dns_rdataset_disassociate(&rdataset);
if (result != ISC_R_NOMORE)
break;
/*
* After deleting, if there's still a signature for
* 'algorithm', set alg_found; if not, set alg_missed.
*/
if (has_alg) {
alg_found = true;
} else {
alg_missed = true;
}
}
if (result == ISC_R_NOMORE)
result = ISC_R_SUCCESS;
/*
* Set `has_algp` if the algorithm was found in every RRset:
* i.e., found in at least one, and not missing from any.
*/
*has_algp = (alg_found && !alg_missed);
failure:
if (dns_rdataset_isassociated(&rdataset))
dns_rdataset_disassociate(&rdataset);
dns_rdatasetiter_destroy(&iterator);
return (result);
}
/*
* Incrementally sign the zone using the keys requested.
* Builds the NSEC chain if required.
*/
static void
zone_sign(dns_zone_t *zone) {
const char *me = "zone_sign";
dns_db_t *db = NULL;
dns_dbnode_t *node = NULL;
dns_dbversion_t *version = NULL;
dns_diff_t _sig_diff;
dns_diff_t post_diff;
dns__zonediff_t zonediff;
dns_fixedname_t fixed;
dns_fixedname_t nextfixed;
dns_name_t *name, *nextname;
dns_rdataset_t rdataset;
dns_signing_t *signing, *nextsigning;
dns_signinglist_t cleanup;
dst_key_t *zone_keys[DNS_MAXZONEKEYS];
int32_t signatures;
bool check_ksk, keyset_kskonly, is_ksk;
bool with_ksk, with_zsk;
bool commit = false;
bool is_bottom_of_zone;
bool build_nsec = false;
bool build_nsec3 = false;
bool first;
isc_result_t result;
isc_stdtime_t now, inception, soaexpire, expire;
uint32_t jitter, sigvalidityinterval, expiryinterval;
unsigned int i, j;
unsigned int nkeys = 0;
uint32_t nodes;
ENTER;
dns_rdataset_init(&rdataset);
name = dns_fixedname_initname(&fixed);
nextname = dns_fixedname_initname(&nextfixed);
dns_diff_init(zone->mctx, &_sig_diff);
dns_diff_init(zone->mctx, &post_diff);
zonediff_init(&zonediff, &_sig_diff);
ISC_LIST_INIT(cleanup);
/*
* Updates are disabled. Pause for 1 minute.
*/
if (zone->update_disabled) {
result = ISC_R_FAILURE;
goto cleanup;
}
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL)
dns_db_attach(zone->db, &db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
if (db == NULL) {
result = ISC_R_FAILURE;
goto cleanup;
}
result = dns_db_newversion(db, &version);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_sign:dns_db_newversion -> %s",
dns_result_totext(result));
goto cleanup;
}
isc_stdtime_get(&now);
result = dns__zone_findkeys(zone, db, version, now, zone->mctx,
DNS_MAXZONEKEYS, zone_keys, &nkeys);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_sign:dns__zone_findkeys -> %s",
dns_result_totext(result));
goto cleanup;
}
sigvalidityinterval = dns_zone_getsigvalidityinterval(zone);
inception = now - 3600; /* Allow for clock skew. */
soaexpire = now + sigvalidityinterval;
expiryinterval = dns_zone_getsigresigninginterval(zone);
if (expiryinterval > sigvalidityinterval) {
expiryinterval = sigvalidityinterval;
} else {
expiryinterval = sigvalidityinterval - expiryinterval;
}
/*
* Spread out signatures over time if they happen to be
* clumped. We don't do this for each add_sigs() call as
* we still want some clustering to occur.
*/
if (sigvalidityinterval >= 3600U) {
isc_random_get(&jitter);
if (sigvalidityinterval > 7200U) {
jitter %= expiryinterval;
} else {
jitter %= 1200;
}
expire = soaexpire - jitter - 1;
} else {
expire = soaexpire - 1;
}
/*
* We keep pulling nodes off each iterator in turn until
* we have no more nodes to pull off or we reach the limits
* for this quantum.
*/
nodes = zone->nodes;
signatures = zone->signatures;
signing = ISC_LIST_HEAD(zone->signing);
first = true;
check_ksk = DNS_ZONE_OPTION(zone, DNS_ZONEOPT_UPDATECHECKKSK);
keyset_kskonly = DNS_ZONE_OPTION(zone, DNS_ZONEOPT_DNSKEYKSKONLY);
/* Determine which type of chain to build */
CHECK(dns_private_chains(db, version, zone->privatetype,
&build_nsec, &build_nsec3));
/* If neither chain is found, default to NSEC */
if (!build_nsec && !build_nsec3)
build_nsec = true;
while (signing != NULL && nodes-- > 0 && signatures > 0) {
bool has_alg = false;
nextsigning = ISC_LIST_NEXT(signing, link);
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (signing->done || signing->db != zone->db) {
/*
* The zone has been reloaded. We will have
* created new signings as part of the reload
* process so we can destroy this one.
*/
ISC_LIST_UNLINK(zone->signing, signing, link);
ISC_LIST_APPEND(cleanup, signing, link);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
goto next_signing;
}
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
if (signing->db != db)
goto next_signing;
is_bottom_of_zone = false;
if (first && signing->deleteit) {
/*
* Remove the key we are deleting from consideration.
*/
for (i = 0, j = 0; i < nkeys; i++) {
/*
* Find the key we want to remove.
*/
if (ALG(zone_keys[i]) == signing->algorithm &&
dst_key_id(zone_keys[i]) == signing->keyid)
{
if (KSK(zone_keys[i]))
dst_key_free(&zone_keys[i]);
continue;
}
zone_keys[j] = zone_keys[i];
j++;
}
for (i = j; i < nkeys; i++) {
zone_keys[i] = NULL;
}
nkeys = j;
}
dns_dbiterator_current(signing->dbiterator, &node, name);
if (signing->deleteit) {
dns_dbiterator_pause(signing->dbiterator);
CHECK(del_sig(db, version, name, node, nkeys,
signing->algorithm, signing->keyid,
&has_alg, zonediff.diff));
}
/*
* On the first pass we need to check if the current node
* has not been obscured.
*/
if (first) {
dns_fixedname_t ffound;
dns_name_t *found;
found = dns_fixedname_initname(&ffound);
result = dns_db_find(db, name, version,
dns_rdatatype_soa,
DNS_DBFIND_NOWILD, 0, NULL, found,
NULL, NULL);
if ((result == DNS_R_DELEGATION ||
result == DNS_R_DNAME) &&
!dns_name_equal(name, found)) {
/*
* Remember the obscuring name so that
* we skip all obscured names.
*/
dns_name_copy(found, name, NULL);
is_bottom_of_zone = true;
goto next_node;
}
}
/*
* Process one node.
*/
with_ksk = false;
with_zsk = false;
dns_dbiterator_pause(signing->dbiterator);
CHECK(check_if_bottom_of_zone(db, node, version,
&is_bottom_of_zone));
for (i = 0; !has_alg && i < nkeys; i++) {
bool both = false;
/*
* Find the keys we want to sign with.
*/
if (!dst_key_isprivate(zone_keys[i]))
continue;
if (dst_key_inactive(zone_keys[i]))
continue;
/*
* When adding look for the specific key.
*/
if (!signing->deleteit &&
(dst_key_alg(zone_keys[i]) != signing->algorithm ||
dst_key_id(zone_keys[i]) != signing->keyid))
continue;
/*
* When deleting make sure we are properly signed
* with the algorithm that was being removed.
*/
if (signing->deleteit &&
ALG(zone_keys[i]) != signing->algorithm)
continue;
/*
* Do we do KSK processing?
*/
if (check_ksk && !REVOKE(zone_keys[i])) {
bool have_ksk, have_nonksk;
if (KSK(zone_keys[i])) {
have_ksk = true;
have_nonksk = false;
} else {
have_ksk = false;
have_nonksk = true;
}
for (j = 0; j < nkeys; j++) {
if (j == i ||
ALG(zone_keys[i]) !=
ALG(zone_keys[j]))
continue;
if (!dst_key_isprivate(zone_keys[j]))
continue;
/* Don't consider inactive keys, however
* the key may be temporary offline, so do
* consider keys which private key files are
* unavailable.
*/
if (REVOKE(zone_keys[j]))
continue;
if (KSK(zone_keys[j]))
have_ksk = true;
else
have_nonksk = true;
both = have_ksk && have_nonksk;
if (both)
break;
}
}
if (both || REVOKE(zone_keys[i]))
is_ksk = KSK(zone_keys[i]);
else
is_ksk = false;
/*
* If deleting signatures, we need to ensure that
* the RRset is still signed at least once by a
* KSK and a ZSK.
*/
if (signing->deleteit && !is_ksk && with_zsk) {
continue;
}
if (signing->deleteit && is_ksk && with_ksk) {
continue;
}
CHECK(sign_a_node(db, name, node, version, build_nsec3,
build_nsec, zone_keys[i], inception,
expire, zone->minimum, is_ksk,
(both && keyset_kskonly),
is_bottom_of_zone, zonediff.diff,
&signatures, zone->mctx));
/*
* If we are adding we are done. Look for other keys
* of the same algorithm if deleting.
*/
if (!signing->deleteit) {
break;
}
if (!is_ksk) {
with_zsk = true;
}
if (KSK(zone_keys[i])) {
with_ksk = true;
}
}
/*
* Go onto next node.
*/
next_node:
first = false;
dns_db_detachnode(db, &node);
do {
result = dns_dbiterator_next(signing->dbiterator);
if (result == ISC_R_NOMORE) {
ISC_LIST_UNLINK(zone->signing, signing, link);
ISC_LIST_APPEND(cleanup, signing, link);
dns_dbiterator_pause(signing->dbiterator);
if (nkeys != 0 && build_nsec) {
/*
* We have finished regenerating the
* zone with a zone signing key.
* The NSEC chain is now complete and
* there is a full set of signatures
* for the zone. We can now clear the
* OPT bit from the NSEC record.
*/
result = updatesecure(db, version,
&zone->origin,
zone->minimum,
false,
&post_diff);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone,
ISC_LOG_ERROR,
"updatesecure -> %s",
dns_result_totext(result));
goto cleanup;
}
}
result = updatesignwithkey(zone, signing,
version,
build_nsec3,
zone->minimum,
&post_diff);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"updatesignwithkey -> %s",
dns_result_totext(result));
goto cleanup;
}
build_nsec = false;
goto next_signing;
} else if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_sign:dns_dbiterator_next -> %s",
dns_result_totext(result));
goto cleanup;
} else if (is_bottom_of_zone) {
dns_dbiterator_current(signing->dbiterator,
&node, nextname);
dns_db_detachnode(db, &node);
if (!dns_name_issubdomain(nextname, name))
break;
} else
break;
} while (1);
continue;
next_signing:
dns_dbiterator_pause(signing->dbiterator);
signing = nextsigning;
first = true;
}
if (ISC_LIST_HEAD(post_diff.tuples) != NULL) {
result = dns__zone_updatesigs(&post_diff, db, version,
zone_keys, nkeys, zone,
inception, expire, now,
check_ksk, keyset_kskonly,
&zonediff);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR, "zone_sign:"
"dns__zone_updatesigs -> %s",
dns_result_totext(result));
goto cleanup;
}
}
/*
* Have we changed anything?
*/
if (ISC_LIST_EMPTY(zonediff.diff->tuples)) {
if (zonediff.offline)
commit = true;
result = ISC_R_SUCCESS;
goto pauseall;
}
commit = true;
result = del_sigs(zone, db, version, &zone->origin, dns_rdatatype_soa,
&zonediff, zone_keys, nkeys, now, false);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_sign:del_sigs -> %s",
dns_result_totext(result));
goto cleanup;
}
result = update_soa_serial(db, version, zonediff.diff, zone->mctx,
zone->updatemethod);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_sign:update_soa_serial -> %s",
dns_result_totext(result));
goto cleanup;
}
/*
* Generate maximum life time signatures so that the above loop
* termination is sensible.
*/
result = add_sigs(db, version, &zone->origin, dns_rdatatype_soa,
zonediff.diff, zone_keys, nkeys, zone->mctx,
inception, soaexpire, check_ksk, keyset_kskonly);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_sign:add_sigs -> %s",
dns_result_totext(result));
goto cleanup;
}
/*
* Write changes to journal file.
*/
CHECK(zone_journal(zone, zonediff.diff, NULL, "zone_sign"));
pauseall:
/*
* Pause all iterators so that dns_db_closeversion() can succeed.
*/
for (signing = ISC_LIST_HEAD(zone->signing);
signing != NULL;
signing = ISC_LIST_NEXT(signing, link))
dns_dbiterator_pause(signing->dbiterator);
for (signing = ISC_LIST_HEAD(cleanup);
signing != NULL;
signing = ISC_LIST_NEXT(signing, link))
dns_dbiterator_pause(signing->dbiterator);
/*
* Everything has succeeded. Commit the changes.
*/
dns_db_closeversion(db, &version, commit);
/*
* Everything succeeded so we can clean these up now.
*/
signing = ISC_LIST_HEAD(cleanup);
while (signing != NULL) {
ISC_LIST_UNLINK(cleanup, signing, link);
dns_db_detach(&signing->db);
dns_dbiterator_destroy(&signing->dbiterator);
isc_mem_put(zone->mctx, signing, sizeof *signing);
signing = ISC_LIST_HEAD(cleanup);
}
LOCK_ZONE(zone);
set_resigntime(zone);
if (commit) {
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDNOTIFY);
zone_needdump(zone, DNS_DUMP_DELAY);
}
UNLOCK_ZONE(zone);
failure:
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR, "zone_sign: failed: %s",
dns_result_totext(result));
}
cleanup:
/*
* Pause all dbiterators.
*/
for (signing = ISC_LIST_HEAD(zone->signing);
signing != NULL;
signing = ISC_LIST_NEXT(signing, link))
dns_dbiterator_pause(signing->dbiterator);
/*
* Rollback the cleanup list.
*/
signing = ISC_LIST_HEAD(cleanup);
while (signing != NULL) {
ISC_LIST_UNLINK(cleanup, signing, link);
ISC_LIST_PREPEND(zone->signing, signing, link);
dns_dbiterator_first(signing->dbiterator);
dns_dbiterator_pause(signing->dbiterator);
signing = ISC_LIST_HEAD(cleanup);
}
dns_diff_clear(&_sig_diff);
for (i = 0; i < nkeys; i++)
dst_key_free(&zone_keys[i]);
if (node != NULL)
dns_db_detachnode(db, &node);
if (version != NULL) {
dns_db_closeversion(db, &version, false);
dns_db_detach(&db);
} else if (db != NULL)
dns_db_detach(&db);
LOCK_ZONE(zone);
if (ISC_LIST_HEAD(zone->signing) != NULL) {
isc_interval_t interval;
if (zone->update_disabled || result != ISC_R_SUCCESS)
isc_interval_set(&interval, 60, 0); /* 1 minute */
else
isc_interval_set(&interval, 0, 10000000); /* 10 ms */
isc_time_nowplusinterval(&zone->signingtime, &interval);
} else {
isc_time_settoepoch(&zone->signingtime);
}
UNLOCK_ZONE(zone);
INSIST(version == NULL);
}
static isc_result_t
normalize_key(dns_rdata_t *rr, dns_rdata_t *target,
unsigned char *data, int size)
{
dns_rdata_dnskey_t dnskey;
dns_rdata_keydata_t keydata;
isc_buffer_t buf;
isc_result_t result;
dns_rdata_reset(target);
isc_buffer_init(&buf, data, size);
switch (rr->type) {
case dns_rdatatype_dnskey:
result = dns_rdata_tostruct(rr, &dnskey, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dnskey.flags &= ~DNS_KEYFLAG_REVOKE;
dns_rdata_fromstruct(target, rr->rdclass, dns_rdatatype_dnskey,
&dnskey, &buf);
break;
case dns_rdatatype_keydata:
result = dns_rdata_tostruct(rr, &keydata, NULL);
if (result == ISC_R_UNEXPECTEDEND)
return (result);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_keydata_todnskey(&keydata, &dnskey, NULL);
dns_rdata_fromstruct(target, rr->rdclass, dns_rdatatype_dnskey,
&dnskey, &buf);
break;
default:
INSIST(0);
ISC_UNREACHABLE();
}
return (ISC_R_SUCCESS);
}
/*
* 'rdset' contains either a DNSKEY rdataset from the zone apex, or
* a KEYDATA rdataset from the key zone.
*
* 'rr' contains either a DNSKEY record, or a KEYDATA record
*
* After normalizing keys to the same format (DNSKEY, with revoke bit
* cleared), return true if a key that matches 'rr' is found in
* 'rdset', or false if not.
*/
static bool
matchkey(dns_rdataset_t *rdset, dns_rdata_t *rr) {
unsigned char data1[4096], data2[4096];
dns_rdata_t rdata, rdata1, rdata2;
isc_result_t result;
dns_rdata_init(&rdata);
dns_rdata_init(&rdata1);
dns_rdata_init(&rdata2);
result = normalize_key(rr, &rdata1, data1, sizeof(data1));
if (result != ISC_R_SUCCESS)
return (false);
for (result = dns_rdataset_first(rdset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(rdset)) {
dns_rdata_reset(&rdata);
dns_rdataset_current(rdset, &rdata);
result = normalize_key(&rdata, &rdata2, data2, sizeof(data2));
if (result != ISC_R_SUCCESS)
continue;
if (dns_rdata_compare(&rdata1, &rdata2) == 0)
return (true);
}
return (false);
}
/*
* Calculate the refresh interval for a keydata zone, per
* RFC5011: MAX(1 hr,
* MIN(15 days,
* 1/2 * OrigTTL,
* 1/2 * RRSigExpirationInterval))
* or for retries: MAX(1 hr,
* MIN(1 day,
* 1/10 * OrigTTL,
* 1/10 * RRSigExpirationInterval))
*/
static inline isc_stdtime_t
refresh_time(dns_keyfetch_t *kfetch, bool retry) {
isc_result_t result;
uint32_t t;
dns_rdataset_t *rdset;
dns_rdata_t sigrr = DNS_RDATA_INIT;
dns_rdata_sig_t sig;
isc_stdtime_t now;
isc_stdtime_get(&now);
if (dns_rdataset_isassociated(&kfetch->dnskeysigset))
rdset = &kfetch->dnskeysigset;
else
return (now + dns_zone_mkey_hour);
result = dns_rdataset_first(rdset);
if (result != ISC_R_SUCCESS)
return (now + dns_zone_mkey_hour);
dns_rdataset_current(rdset, &sigrr);
result = dns_rdata_tostruct(&sigrr, &sig, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (!retry) {
t = sig.originalttl / 2;
if (isc_serial_gt(sig.timeexpire, now)) {
uint32_t exp = (sig.timeexpire - now) / 2;
if (t > exp)
t = exp;
}
if (t > (15 * dns_zone_mkey_day))
t = (15 * dns_zone_mkey_day);
if (t < dns_zone_mkey_hour)
t = dns_zone_mkey_hour;
} else {
t = sig.originalttl / 10;
if (isc_serial_gt(sig.timeexpire, now)) {
uint32_t exp = (sig.timeexpire - now) / 10;
if (t > exp)
t = exp;
}
if (t > dns_zone_mkey_day)
t = dns_zone_mkey_day;
if (t < dns_zone_mkey_hour)
t = dns_zone_mkey_hour;
}
return (now + t);
}
/*
* This routine is called when no changes are needed in a KEYDATA
* record except to simply update the refresh timer. Caller should
* hold zone lock.
*/
static isc_result_t
minimal_update(dns_keyfetch_t *kfetch, dns_dbversion_t *ver, dns_diff_t *diff)
{
isc_result_t result;
isc_buffer_t keyb;
unsigned char key_buf[4096];
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdata_keydata_t keydata;
dns_name_t *name;
dns_zone_t *zone = kfetch->zone;
isc_stdtime_t now;
name = dns_fixedname_name(&kfetch->name);
isc_stdtime_get(&now);
for (result = dns_rdataset_first(&kfetch->keydataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&kfetch->keydataset)) {
dns_rdata_reset(&rdata);
dns_rdataset_current(&kfetch->keydataset, &rdata);
/* Delete old version */
CHECK(update_one_rr(kfetch->db, ver, diff, DNS_DIFFOP_DEL,
name, 0, &rdata));
/* Update refresh timer */
result = dns_rdata_tostruct(&rdata, &keydata, NULL);
if (result == ISC_R_UNEXPECTEDEND)
continue;
if (result != ISC_R_SUCCESS)
goto failure;
keydata.refresh = refresh_time(kfetch, true);
set_refreshkeytimer(zone, &keydata, now, false);
dns_rdata_reset(&rdata);
isc_buffer_init(&keyb, key_buf, sizeof(key_buf));
CHECK(dns_rdata_fromstruct(&rdata,
zone->rdclass, dns_rdatatype_keydata,
&keydata, &keyb));
/* Insert updated version */
CHECK(update_one_rr(kfetch->db, ver, diff, DNS_DIFFOP_ADD,
name, 0, &rdata));
}
result = ISC_R_SUCCESS;
failure:
return (result);
}
/*
* Verify that DNSKEY set is signed by the key specified in 'keydata'.
*/
static bool
revocable(dns_keyfetch_t *kfetch, dns_rdata_keydata_t *keydata) {
isc_result_t result;
dns_name_t *keyname;
isc_mem_t *mctx;
dns_rdata_t sigrr = DNS_RDATA_INIT;
dns_rdata_t rr = DNS_RDATA_INIT;
dns_rdata_rrsig_t sig;
dns_rdata_dnskey_t dnskey;
dst_key_t *dstkey = NULL;
unsigned char key_buf[4096];
isc_buffer_t keyb;
bool answer = false;
REQUIRE(kfetch != NULL && keydata != NULL);
REQUIRE(dns_rdataset_isassociated(&kfetch->dnskeysigset));
keyname = dns_fixedname_name(&kfetch->name);
mctx = kfetch->zone->view->mctx;
/* Generate a key from keydata */
isc_buffer_init(&keyb, key_buf, sizeof(key_buf));
dns_keydata_todnskey(keydata, &dnskey, NULL);
dns_rdata_fromstruct(&rr, keydata->common.rdclass,
dns_rdatatype_dnskey, &dnskey, &keyb);
result = dns_dnssec_keyfromrdata(keyname, &rr, mctx, &dstkey);
if (result != ISC_R_SUCCESS)
return (false);
/* See if that key generated any of the signatures */
for (result = dns_rdataset_first(&kfetch->dnskeysigset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&kfetch->dnskeysigset))
{
dns_fixedname_t fixed;
dns_fixedname_init(&fixed);
dns_rdata_reset(&sigrr);
dns_rdataset_current(&kfetch->dnskeysigset, &sigrr);
result = dns_rdata_tostruct(&sigrr, &sig, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (dst_key_alg(dstkey) == sig.algorithm &&
dst_key_rid(dstkey) == sig.keyid)
{
result = dns_dnssec_verify2(keyname,
&kfetch->dnskeyset,
dstkey, false, mctx, &sigrr,
dns_fixedname_name(&fixed));
dns_zone_log(kfetch->zone, ISC_LOG_DEBUG(3),
"Confirm revoked DNSKEY is self-signed: "
"%s", dns_result_totext(result));
if (result == ISC_R_SUCCESS) {
answer = true;
break;
}
}
}
dst_key_free(&dstkey);
return (answer);
}
/*
* A DNSKEY set has been fetched from the zone apex of a zone whose trust
* anchors are being managed; scan the keyset, and update the key zone and the
* local trust anchors according to RFC5011.
*/
static void
keyfetch_done(isc_task_t *task, isc_event_t *event) {
isc_result_t result, eresult;
dns_fetchevent_t *devent;
dns_keyfetch_t *kfetch;
dns_zone_t *zone;
isc_mem_t *mctx = NULL;
dns_keytable_t *secroots = NULL;
dns_dbversion_t *ver = NULL;
dns_diff_t diff;
bool alldone = false;
bool commit = false;
dns_name_t *keyname;
dns_rdata_t sigrr = DNS_RDATA_INIT;
dns_rdata_t dnskeyrr = DNS_RDATA_INIT;
dns_rdata_t keydatarr = DNS_RDATA_INIT;
dns_rdata_rrsig_t sig;
dns_rdata_dnskey_t dnskey;
dns_rdata_keydata_t keydata;
bool initializing;
char namebuf[DNS_NAME_FORMATSIZE];
unsigned char key_buf[4096];
isc_buffer_t keyb;
dst_key_t *dstkey;
isc_stdtime_t now;
int pending = 0;
bool secure = false;
bool free_needed;
UNUSED(task);
INSIST(event != NULL && event->ev_type == DNS_EVENT_FETCHDONE);
INSIST(event->ev_arg != NULL);
kfetch = event->ev_arg;
zone = kfetch->zone;
isc_mem_attach(zone->mctx, &mctx);
keyname = dns_fixedname_name(&kfetch->name);
devent = (dns_fetchevent_t *) event;
eresult = devent->result;
/* Free resources which are not of interest */
if (devent->node != NULL)
dns_db_detachnode(devent->db, &devent->node);
if (devent->db != NULL)
dns_db_detach(&devent->db);
isc_event_free(&event);
dns_resolver_destroyfetch(&kfetch->fetch);
LOCK_ZONE(zone);
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING) || zone->view == NULL)
goto cleanup;
isc_stdtime_get(&now);
dns_name_format(keyname, namebuf, sizeof(namebuf));
result = dns_view_getsecroots(zone->view, &secroots);
INSIST(result == ISC_R_SUCCESS);
dns_diff_init(mctx, &diff);
CHECK(dns_db_newversion(kfetch->db, &ver));
zone->refreshkeycount--;
alldone = (zone->refreshkeycount == 0);
if (alldone)
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_REFRESHING);
dns_zone_log(zone, ISC_LOG_DEBUG(3),
"Returned from key fetch in keyfetch_done() for "
"'%s': %s", namebuf, dns_result_totext(eresult));
/* Fetch failed */
if (eresult != ISC_R_SUCCESS ||
!dns_rdataset_isassociated(&kfetch->dnskeyset)) {
dns_zone_log(zone, ISC_LOG_WARNING,
"Unable to fetch DNSKEY set "
"'%s': %s", namebuf, dns_result_totext(eresult));
CHECK(minimal_update(kfetch, ver, &diff));
goto done;
}
/* No RRSIGs found */
if (!dns_rdataset_isassociated(&kfetch->dnskeysigset)) {
dns_zone_log(zone, ISC_LOG_WARNING,
"No DNSKEY RRSIGs found for "
"'%s': %s", namebuf, dns_result_totext(eresult));
CHECK(minimal_update(kfetch, ver, &diff));
goto done;
}
/*
* Clear any cached trust level, as we need to run validation
* over again; trusted keys might have changed.
*/
kfetch->dnskeyset.trust = kfetch->dnskeysigset.trust = dns_trust_none;
/*
* Validate the dnskeyset against the current trusted keys.
*/
for (result = dns_rdataset_first(&kfetch->dnskeysigset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&kfetch->dnskeysigset)) {
dns_keynode_t *keynode = NULL;
dns_rdata_reset(&sigrr);
dns_rdataset_current(&kfetch->dnskeysigset, &sigrr);
result = dns_rdata_tostruct(&sigrr, &sig, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
result = dns_keytable_find(secroots, keyname, &keynode);
while (result == ISC_R_SUCCESS) {
dns_keynode_t *nextnode = NULL;
dns_fixedname_t fixed;
dns_fixedname_init(&fixed);
dstkey = dns_keynode_key(keynode);
if (dstkey == NULL) /* fail_secure() was called */
break;
if (dst_key_alg(dstkey) == sig.algorithm &&
dst_key_id(dstkey) == sig.keyid) {
result = dns_dnssec_verify2(keyname,
&kfetch->dnskeyset,
dstkey, false,
zone->view->mctx, &sigrr,
dns_fixedname_name(&fixed));
dns_zone_log(zone, ISC_LOG_DEBUG(3),
"Verifying DNSKEY set for zone "
"'%s' using key %d/%d: %s",
namebuf, sig.keyid, sig.algorithm,
dns_result_totext(result));
if (result == ISC_R_SUCCESS) {
kfetch->dnskeyset.trust =
dns_trust_secure;
kfetch->dnskeysigset.trust =
dns_trust_secure;
break;
}
}
result = dns_keytable_nextkeynode(secroots,
keynode, &nextnode);
dns_keytable_detachkeynode(secroots, &keynode);
keynode = nextnode;
}
if (keynode != NULL)
dns_keytable_detachkeynode(secroots, &keynode);
if (kfetch->dnskeyset.trust == dns_trust_secure) {
secure = true;
break;
}
}
/*
* If we were not able to verify the answer using the current
* trusted keys then all we can do is look at any revoked keys.
*/
if (!secure) {
dns_zone_log(zone, ISC_LOG_DEBUG(3),
"DNSKEY set for zone '%s' could not be verified "
"with current keys", namebuf);
}
/*
* First scan keydataset to find keys that are not in dnskeyset
* - Missing keys which are not scheduled for removal,
* log a warning
* - Missing keys which are scheduled for removal and
* the remove hold-down timer has completed should
* be removed from the key zone
* - Missing keys whose acceptance timers have not yet
* completed, log a warning and reset the acceptance
* timer to 30 days in the future
* - All keys not being removed have their refresh timers
* updated
*/
initializing = true;
for (result = dns_rdataset_first(&kfetch->keydataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&kfetch->keydataset))
{
dns_keytag_t keytag;
dns_rdata_reset(&keydatarr);
dns_rdataset_current(&kfetch->keydataset, &keydatarr);
result = dns_rdata_tostruct(&keydatarr, &keydata, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_keydata_todnskey(&keydata, &dnskey, NULL);
result = compute_tag(keyname, &dnskey, mctx, &keytag);
if (result != ISC_R_SUCCESS) {
/*
* Skip if we cannot compute the key tag.
* This may happen if the algorithm is unsupported
*/
dns_zone_log(zone, ISC_LOG_ERROR,
"Cannot compute tag for key in zone %s: %s "
"(skipping)",
namebuf, dns_result_totext(result));
continue;
}
RUNTIME_CHECK(result == ISC_R_SUCCESS);
/*
* If any keydata record has a nonzero add holddown, then
* there was a pre-existing trust anchor for this domain;
* that means we are *not* initializing it and shouldn't
* automatically trust all the keys we find at the zone apex.
*/
initializing = initializing && (keydata.addhd == 0);
if (! matchkey(&kfetch->dnskeyset, &keydatarr)) {
bool deletekey = false;
if (!secure) {
if (keydata.removehd != 0 &&
keydata.removehd <= now) {
deletekey = true;
}
} else if (keydata.addhd == 0) {
deletekey = true;
} else if (keydata.addhd > now) {
dns_zone_log(zone, ISC_LOG_DEBUG(3),
"Pending key %d for zone %s "
"unexpectedly missing "
"restarting 30-day acceptance "
"timer", keytag, namebuf);
if (keydata.addhd < now + dns_zone_mkey_month)
keydata.addhd =
now + dns_zone_mkey_month;
keydata.refresh = refresh_time(kfetch,
false);
} else if (keydata.removehd == 0) {
dns_zone_log(zone, ISC_LOG_DEBUG(3),
"Active key %d for zone %s "
"unexpectedly missing",
keytag, namebuf);
keydata.refresh = now + dns_zone_mkey_hour;
} else if (keydata.removehd <= now) {
deletekey = true;
dns_zone_log(zone, ISC_LOG_DEBUG(3),
"Revoked key %d for zone %s "
"missing: deleting from "
"managed keys database",
keytag, namebuf);
} else {
keydata.refresh = refresh_time(kfetch,
false);
}
if (secure || deletekey) {
/* Delete old version */
CHECK(update_one_rr(kfetch->db, ver, &diff,
DNS_DIFFOP_DEL, keyname, 0,
&keydatarr));
}
if (!secure || deletekey)
continue;
dns_rdata_reset(&keydatarr);
isc_buffer_init(&keyb, key_buf, sizeof(key_buf));
dns_rdata_fromstruct(&keydatarr, zone->rdclass,
dns_rdatatype_keydata,
&keydata, &keyb);
/* Insert updated version */
CHECK(update_one_rr(kfetch->db, ver, &diff,
DNS_DIFFOP_ADD, keyname, 0,
&keydatarr));
set_refreshkeytimer(zone, &keydata, now, false);
}
}
/*
* Next scan dnskeyset:
* - If new keys are found (i.e., lacking a match in keydataset)
* add them to the key zone and set the acceptance timer
* to 30 days in the future (or to immediately if we've
* determined that we're initializing the zone for the
* first time)
* - Previously-known keys that have been revoked
* must be scheduled for removal from the key zone (or,
* if they hadn't been accepted as trust anchors yet
* anyway, removed at once)
* - Previously-known unrevoked keys whose acceptance timers
* have completed are promoted to trust anchors
* - All keys not being removed have their refresh
* timers updated
*/
for (result = dns_rdataset_first(&kfetch->dnskeyset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&kfetch->dnskeyset))
{
bool revoked = false;
bool newkey = false;
bool updatekey = false;
bool deletekey = false;
bool trustkey = false;
dns_keytag_t keytag;
dns_rdata_reset(&dnskeyrr);
dns_rdataset_current(&kfetch->dnskeyset, &dnskeyrr);
result = dns_rdata_tostruct(&dnskeyrr, &dnskey, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
/* Skip ZSK's */
if ((dnskey.flags & DNS_KEYFLAG_KSK) == 0) {
continue;
}
result = compute_tag(keyname, &dnskey, mctx, &keytag);
if (result != ISC_R_SUCCESS) {
/*
* Skip if we cannot compute the key tag.
* This may happen if the algorithm is unsupported
*/
dns_zone_log(zone, ISC_LOG_ERROR,
"Cannot compute tag for key in zone %s: %s "
"(skipping)",
namebuf, dns_result_totext(result));
continue;
}
RUNTIME_CHECK(result == ISC_R_SUCCESS);
revoked = ((dnskey.flags & DNS_KEYFLAG_REVOKE) != 0);
if (matchkey(&kfetch->keydataset, &dnskeyrr)) {
dns_rdata_reset(&keydatarr);
dns_rdataset_current(&kfetch->keydataset, &keydatarr);
result = dns_rdata_tostruct(&keydatarr, &keydata, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (revoked && revocable(kfetch, &keydata)) {
if (keydata.addhd > now) {
/*
* Key wasn't trusted yet, and now
* it's been revoked? Just remove it
*/
deletekey = true;
dns_zone_log(zone, ISC_LOG_DEBUG(3),
"Pending key %d "
"for zone %s is now "
"revoked: "
"deleting from the "
"managed keys database",
keytag, namebuf);
} else if (keydata.removehd == 0) {
/*
* Remove key from secroots.
*/
dns_view_untrust(zone->view, keyname,
&dnskey, mctx);
/* If initializing, delete now */
if (keydata.addhd == 0)
deletekey = true;
else {
keydata.removehd = now +
dns_zone_mkey_month;
keydata.flags |=
DNS_KEYFLAG_REVOKE;
}
dns_zone_log(zone, ISC_LOG_INFO,
"Trusted key %d "
"for zone %s is now "
"revoked",
keytag, namebuf);
} else if (keydata.removehd < now) {
/* Scheduled for removal */
deletekey = true;
dns_zone_log(zone, ISC_LOG_INFO,
"Revoked key %d "
"for zone %s removal "
"timer complete: "
"deleting from the "
"managed keys database",
keytag, namebuf);
}
} else if (revoked && keydata.removehd == 0) {
dns_zone_log(zone, ISC_LOG_WARNING,
"Active key %d for zone "
"%s is revoked but "
"did not self-sign; "
"ignoring", keytag, namebuf);
continue;
} else if (secure) {
if (keydata.removehd != 0) {
/*
* Key isn't revoked--but it
* seems it used to be.
* Remove it now and add it
* back as if it were a fresh key,
* with a 30-day acceptance timer.
*/
deletekey = true;
newkey = true;
keydata.removehd = 0;
keydata.addhd =
now + dns_zone_mkey_month;
dns_zone_log(zone, ISC_LOG_DEBUG(3),
"Revoked key %d "
"for zone %s "
"has returned: starting "
"30-day acceptance timer",
keytag, namebuf);
} else if (keydata.addhd > now)
pending++;
else if (keydata.addhd == 0)
keydata.addhd = now;
if (keydata.addhd <= now) {
trustkey = true;
dns_zone_log(zone, ISC_LOG_INFO,
"Key %d for zone %s "
"acceptance timer "
"complete: "
"key now trusted",
keytag, namebuf);
}
} else if (keydata.addhd > now) {
/*
* Not secure, and key is pending:
* reset the acceptance timer
*/
pending++;
keydata.addhd = now + dns_zone_mkey_month;
dns_zone_log(zone, ISC_LOG_DEBUG(3),
"Pending key %d "
"for zone %s was "
"not validated: restarting "
"30-day acceptance timer",
keytag, namebuf);
}
if (!deletekey && !newkey)
updatekey = true;
} else if (secure) {
/*
* Key wasn't in the key zone but it's
* revoked now anyway, so just skip it
*/
if (revoked)
continue;
/* Key wasn't in the key zone: add it */
newkey = true;
if (initializing) {
dns_zone_log(zone, ISC_LOG_WARNING,
"Initializing automatic trust "
"anchor management for zone '%s'; "
"DNSKEY ID %d is now trusted, "
"waiving the normal 30-day "
"waiting period.",
namebuf, keytag);
trustkey = true;
} else {
dns_zone_log(zone, ISC_LOG_INFO,
"New key %d observed "
"for zone '%s': "
"starting 30-day "
"acceptance timer",
keytag, namebuf);
}
} else {
/*
* No previously known key, and the key is not
* secure, so skip it.
*/
continue;
}
/* Delete old version */
if (deletekey || !newkey)
CHECK(update_one_rr(kfetch->db, ver, &diff,
DNS_DIFFOP_DEL, keyname, 0,
&keydatarr));
if (updatekey) {
/* Set refresh timer */
keydata.refresh = refresh_time(kfetch, false);
dns_rdata_reset(&keydatarr);
isc_buffer_init(&keyb, key_buf, sizeof(key_buf));
dns_rdata_fromstruct(&keydatarr, zone->rdclass,
dns_rdatatype_keydata,
&keydata, &keyb);
/* Insert updated version */
CHECK(update_one_rr(kfetch->db, ver, &diff,
DNS_DIFFOP_ADD, keyname, 0,
&keydatarr));
} else if (newkey) {
/* Convert DNSKEY to KEYDATA */
result = dns_rdata_tostruct(&dnskeyrr, &dnskey, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_keydata_fromdnskey(&keydata, &dnskey, 0, 0, 0,
NULL);
keydata.addhd = initializing
? now : now + dns_zone_mkey_month;
keydata.refresh = refresh_time(kfetch, false);
dns_rdata_reset(&keydatarr);
isc_buffer_init(&keyb, key_buf, sizeof(key_buf));
dns_rdata_fromstruct(&keydatarr, zone->rdclass,
dns_rdatatype_keydata,
&keydata, &keyb);
/* Insert into key zone */
CHECK(update_one_rr(kfetch->db, ver, &diff,
DNS_DIFFOP_ADD, keyname, 0,
&keydatarr));
}
if (trustkey) {
/* Trust this key. */
result = dns_rdata_tostruct(&dnskeyrr, &dnskey, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
trust_key(zone, keyname, &dnskey, mctx);
}
if (secure && !deletekey) {
INSIST(newkey || updatekey);
set_refreshkeytimer(zone, &keydata, now, false);
}
}
/*
* RFC5011 says, "A trust point that has all of its trust anchors
* revoked is considered deleted and is treated as if the trust
* point was never configured." But if someone revoked their
* active key before the standby was trusted, that would mean the
* zone would suddenly be nonsecured. We avoid this by checking to
* see if there's pending keydata. If so, we put a null key in
* the security roots; then all queries to the zone will fail.
*/
if (pending != 0)
fail_secure(zone, keyname);
done:
if (!ISC_LIST_EMPTY(diff.tuples)) {
/* Write changes to journal file. */
CHECK(update_soa_serial(kfetch->db, ver, &diff, mctx,
zone->updatemethod));
CHECK(zone_journal(zone, &diff, NULL, "keyfetch_done"));
commit = true;
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_LOADED);
zone_needdump(zone, 30);
}
failure:
dns_diff_clear(&diff);
if (ver != NULL)
dns_db_closeversion(kfetch->db, &ver, commit);
cleanup:
dns_db_detach(&kfetch->db);
INSIST(zone->irefs > 0);
zone->irefs--;
kfetch->zone = NULL;
if (dns_rdataset_isassociated(&kfetch->keydataset))
dns_rdataset_disassociate(&kfetch->keydataset);
if (dns_rdataset_isassociated(&kfetch->dnskeyset))
dns_rdataset_disassociate(&kfetch->dnskeyset);
if (dns_rdataset_isassociated(&kfetch->dnskeysigset))
dns_rdataset_disassociate(&kfetch->dnskeysigset);
dns_name_free(keyname, mctx);
isc_mem_put(mctx, kfetch, sizeof(dns_keyfetch_t));
isc_mem_detach(&mctx);
if (secroots != NULL)
dns_keytable_detach(&secroots);
free_needed = exit_check(zone);
UNLOCK_ZONE(zone);
if (free_needed)
zone_free(zone);
INSIST(ver == NULL);
}
/*
* Refresh the data in the key zone. Initiate a fetch to get new DNSKEY
* records from the zone apex.
*/
static void
zone_refreshkeys(dns_zone_t *zone) {
const char me[] = "zone_refreshkeys";
isc_result_t result;
dns_rriterator_t rrit;
dns_db_t *db = NULL;
dns_dbversion_t *ver = NULL;
dns_diff_t diff;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdata_keydata_t kd;
isc_stdtime_t now;
bool commit = false;
bool fetching = false, fetch_err = false;
bool timerset = false;
ENTER;
REQUIRE(zone->db != NULL);
isc_stdtime_get(&now);
LOCK_ZONE(zone);
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING)) {
isc_time_settoepoch(&zone->refreshkeytime);
UNLOCK_ZONE(zone);
return;
}
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
dns_db_attach(zone->db, &db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
dns_diff_init(zone->mctx, &diff);
CHECK(dns_db_newversion(db, &ver));
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_REFRESHING);
dns_rriterator_init(&rrit, db, ver, 0);
for (result = dns_rriterator_first(&rrit);
result == ISC_R_SUCCESS;
result = dns_rriterator_nextrrset(&rrit)) {
isc_stdtime_t timer = 0xffffffff;
dns_name_t *name = NULL, *kname = NULL;
dns_rdataset_t *kdset = NULL;
dns_keyfetch_t *kfetch;
uint32_t ttl;
dns_rriterator_current(&rrit, &name, &ttl, &kdset, NULL);
if (kdset == NULL || kdset->type != dns_rdatatype_keydata ||
!dns_rdataset_isassociated(kdset))
continue;
/*
* Scan the stored keys looking for ones that need
* removal or refreshing
*/
for (result = dns_rdataset_first(kdset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(kdset)) {
dns_rdata_reset(&rdata);
dns_rdataset_current(kdset, &rdata);
result = dns_rdata_tostruct(&rdata, &kd, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
/* Removal timer expired? */
if (kd.removehd != 0 && kd.removehd < now) {
CHECK(update_one_rr(db, ver, &diff,
DNS_DIFFOP_DEL, name, ttl,
&rdata));
continue;
}
/* Acceptance timer expired? */
if (kd.addhd <= now)
timer = kd.addhd;
/* Or do we just need to refresh the keyset? */
if (timer > kd.refresh)
timer = kd.refresh;
set_refreshkeytimer(zone, &kd, now, false);
timerset = true;
}
if (timer > now)
continue;
kfetch = isc_mem_get(zone->mctx, sizeof(dns_keyfetch_t));
if (kfetch == NULL) {
fetch_err = true;
goto failure;
}
zone->refreshkeycount++;
kfetch->zone = zone;
zone->irefs++;
INSIST(zone->irefs != 0);
kname = dns_fixedname_initname(&kfetch->name);
dns_name_dup(name, zone->mctx, kname);
dns_rdataset_init(&kfetch->dnskeyset);
dns_rdataset_init(&kfetch->dnskeysigset);
dns_rdataset_init(&kfetch->keydataset);
dns_rdataset_clone(kdset, &kfetch->keydataset);
kfetch->db = NULL;
dns_db_attach(db, &kfetch->db);
kfetch->fetch = NULL;
if (isc_log_wouldlog(dns_lctx, ISC_LOG_DEBUG(3))) {
char namebuf[DNS_NAME_FORMATSIZE];
dns_name_format(kname, namebuf,
sizeof(namebuf));
dns_zone_log(zone, ISC_LOG_DEBUG(3),
"Creating key fetch in "
"zone_refreshkeys() for '%s'",
namebuf);
}
/*
* Use of DNS_FETCHOPT_NOCACHED is essential here. If it is
* not set and the cache still holds a non-expired, validated
* version of the RRset being queried for by the time the
* response is received, the cached RRset will be passed to
* keyfetch_done() instead of the one received in the response
* as the latter will have a lower trust level due to not being
* validated until keyfetch_done() is called.
*/
#ifdef ENABLE_AFL
if (dns_fuzzing_resolver == false) {
#endif
result = dns_resolver_createfetch(zone->view->resolver,
kname, dns_rdatatype_dnskey,
NULL, NULL, NULL,
DNS_FETCHOPT_NOVALIDATE|
DNS_FETCHOPT_UNSHARED|
DNS_FETCHOPT_NOCACHED,
zone->task,
keyfetch_done, kfetch,
&kfetch->dnskeyset,
&kfetch->dnskeysigset,
&kfetch->fetch);
#ifdef ENABLE_AFL
} else {
result = ISC_R_FAILURE;
}
#endif
if (result == ISC_R_SUCCESS)
fetching = true;
else {
zone->refreshkeycount--;
zone->irefs--;
dns_db_detach(&kfetch->db);
dns_rdataset_disassociate(&kfetch->keydataset);
dns_name_free(kname, zone->mctx);
isc_mem_put(zone->mctx, kfetch, sizeof(dns_keyfetch_t));
dns_zone_log(zone, ISC_LOG_WARNING,
"Failed to create fetch for "
"DNSKEY update");
fetch_err = true;
}
}
if (!ISC_LIST_EMPTY(diff.tuples)) {
CHECK(update_soa_serial(db, ver, &diff, zone->mctx,
zone->updatemethod));
CHECK(zone_journal(zone, &diff, NULL, "zone_refreshkeys"));
commit = true;
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_LOADED);
zone_needdump(zone, 30);
}
failure:
if (fetch_err) {
/*
* Error during a key fetch; retry in an hour.
*/
isc_time_t timenow, timethen;
char timebuf[80];
TIME_NOW(&timenow);
DNS_ZONE_TIME_ADD(&timenow, dns_zone_mkey_hour, &timethen);
zone->refreshkeytime = timethen;
zone_settimer(zone, &timenow);
isc_time_formattimestamp(&zone->refreshkeytime, timebuf, 80);
dns_zone_log(zone, ISC_LOG_DEBUG(1), "retry key refresh: %s",
timebuf);
} else if (!timerset) {
isc_time_settoepoch(&zone->refreshkeytime);
}
if (!fetching)
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_REFRESHING);
dns_diff_clear(&diff);
if (ver != NULL) {
dns_rriterator_destroy(&rrit);
dns_db_closeversion(db, &ver, commit);
}
dns_db_detach(&db);
UNLOCK_ZONE(zone);
INSIST(ver == NULL);
}
static void
zone_maintenance(dns_zone_t *zone) {
const char me[] = "zone_maintenance";
isc_time_t now;
isc_result_t result;
bool dumping, load_pending;
REQUIRE(DNS_ZONE_VALID(zone));
ENTER;
/*
* Are we pending load/reload?
*/
LOCK_ZONE(zone);
load_pending = DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADPENDING);
UNLOCK_ZONE(zone);
if (load_pending) {
return;
}
/*
* Configuring the view of this zone may have
* failed, for example because the config file
* had a syntax error. In that case, the view
* adb or resolver will be NULL, and we had better not try
* to do further maintenance on it.
*/
if (zone->view == NULL || zone->view->adb == NULL)
return;
TIME_NOW(&now);
/*
* Expire check.
*/
switch (zone->type) {
case dns_zone_redirect:
if (zone->masters == NULL)
break;
/* FALLTHROUGH */
case dns_zone_slave:
case dns_zone_stub:
LOCK_ZONE(zone);
if (isc_time_compare(&now, &zone->expiretime) >= 0 &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED)) {
zone_expire(zone);
zone->refreshtime = now;
}
UNLOCK_ZONE(zone);
break;
default:
break;
}
/*
* Up to date check.
*/
switch (zone->type) {
case dns_zone_redirect:
if (zone->masters == NULL)
break;
/* FALLTHROUGH */
case dns_zone_slave:
case dns_zone_stub:
if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALREFRESH) &&
isc_time_compare(&now, &zone->refreshtime) >= 0)
dns_zone_refresh(zone);
break;
default:
break;
}
/*
* Slaves send notifies before backing up to disk, masters after.
*/
if (zone->type == dns_zone_slave &&
(DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDNOTIFY) ||
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDSTARTUPNOTIFY)) &&
isc_time_compare(&now, &zone->notifytime) >= 0)
zone_notify(zone, &now);
/*
* Do we need to consolidate the backing store?
*/
switch (zone->type) {
case dns_zone_master:
case dns_zone_slave:
case dns_zone_key:
case dns_zone_redirect:
case dns_zone_stub:
LOCK_ZONE(zone);
if (zone->masterfile != NULL &&
isc_time_compare(&now, &zone->dumptime) >= 0 &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED) &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP)) {
dumping = was_dumping(zone);
} else
dumping = true;
UNLOCK_ZONE(zone);
if (!dumping) {
result = zone_dump(zone, true); /* task locked */
if (result != ISC_R_SUCCESS)
dns_zone_log(zone, ISC_LOG_WARNING,
"dump failed: %s",
dns_result_totext(result));
}
break;
default:
break;
}
/*
* Master/redirect zones send notifies now, if needed
*/
switch (zone->type) {
case dns_zone_master:
case dns_zone_redirect:
if ((DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDNOTIFY) ||
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDSTARTUPNOTIFY))&&
isc_time_compare(&now, &zone->notifytime) >= 0)
zone_notify(zone, &now);
default:
break;
}
/*
* Do we need to refresh keys?
*/
switch (zone->type) {
case dns_zone_key:
if (isc_time_compare(&now, &zone->refreshkeytime) >= 0) {
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_REFRESHING)) {
zone_refreshkeys(zone);
}
}
break;
case dns_zone_master:
if (!isc_time_isepoch(&zone->refreshkeytime) &&
isc_time_compare(&now, &zone->refreshkeytime) >= 0 &&
zone->rss_event == NULL)
zone_rekey(zone);
default:
break;
}
switch (zone->type) {
case dns_zone_master:
case dns_zone_redirect:
case dns_zone_slave:
/*
* Do we need to sign/resign some RRsets?
*/
if (zone->rss_event != NULL)
break;
if (!isc_time_isepoch(&zone->signingtime) &&
isc_time_compare(&now, &zone->signingtime) >= 0) {
zone_sign(zone);
}
else if (!isc_time_isepoch(&zone->resigntime) &&
isc_time_compare(&now, &zone->resigntime) >= 0) {
zone_resigninc(zone);
}
else if (!isc_time_isepoch(&zone->nsec3chaintime) &&
isc_time_compare(&now, &zone->nsec3chaintime) >= 0) {
zone_nsec3chain(zone);
}
/*
* Do we need to issue a key expiry warning?
*/
if (!isc_time_isepoch(&zone->keywarntime) &&
isc_time_compare(&now, &zone->keywarntime) >= 0)
set_key_expiry_warning(zone, zone->key_expiry,
isc_time_seconds(&now));
break;
default:
break;
}
LOCK_ZONE(zone);
zone_settimer(zone, &now);
UNLOCK_ZONE(zone);
}
void
dns_zone_markdirty(dns_zone_t *zone) {
uint32_t serial;
isc_result_t result = ISC_R_SUCCESS;
dns_zone_t *secure = NULL;
/*
* Obtaining a lock on the zone->secure (see zone_send_secureserial)
* could result in a deadlock due to a LOR so we will spin if we
* can't obtain the both locks.
*/
again:
LOCK_ZONE(zone);
if (zone->type == dns_zone_master) {
if (inline_raw(zone)) {
unsigned int soacount;
secure = zone->secure;
INSIST(secure != zone);
TRYLOCK_ZONE(result, secure);
if (result != ISC_R_SUCCESS) {
UNLOCK_ZONE(zone);
secure = NULL;
#ifdef ISC_PLATFORM_USETHREADS
isc_thread_yield();
#endif
goto again;
}
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL) {
result = zone_get_from_db(zone, zone->db, NULL,
&soacount, &serial,
NULL, NULL, NULL,
NULL, NULL);
} else
result = DNS_R_NOTLOADED;
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
if (result == ISC_R_SUCCESS && soacount > 0U)
zone_send_secureserial(zone, serial);
}
/* XXXMPA make separate call back */
if (result == ISC_R_SUCCESS) {
set_resigntime(zone);
if (zone->task != NULL) {
isc_time_t now;
TIME_NOW(&now);
zone_settimer(zone, &now);
}
}
}
if (secure != NULL)
UNLOCK_ZONE(secure);
zone_needdump(zone, DNS_DUMP_DELAY);
UNLOCK_ZONE(zone);
}
void
dns_zone_expire(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone_expire(zone);
UNLOCK_ZONE(zone);
}
static void
zone_expire(dns_zone_t *zone) {
/*
* 'zone' locked by caller.
*/
REQUIRE(LOCKED_ZONE(zone));
dns_zone_log(zone, ISC_LOG_WARNING, "expired");
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_EXPIRED);
zone->refresh = DNS_ZONE_DEFAULTREFRESH;
zone->retry = DNS_ZONE_DEFAULTRETRY;
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_HAVETIMERS);
zone_unload(zone);
}
void
dns_zone_refresh(dns_zone_t *zone) {
isc_interval_t i;
uint32_t oldflags;
unsigned int j;
isc_result_t result;
REQUIRE(DNS_ZONE_VALID(zone));
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING))
return;
/*
* Set DNS_ZONEFLG_REFRESH so that there is only one refresh operation
* in progress at a time.
*/
LOCK_ZONE(zone);
oldflags = zone->flags;
if (zone->masterscnt == 0) {
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOMASTERS);
if ((oldflags & DNS_ZONEFLG_NOMASTERS) == 0)
dns_zone_log(zone, ISC_LOG_ERROR,
"cannot refresh: no masters");
goto unlock;
}
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_REFRESH);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NOEDNS);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_USEALTXFRSRC);
if ((oldflags & (DNS_ZONEFLG_REFRESH|DNS_ZONEFLG_LOADING)) != 0)
goto unlock;
/*
* Set the next refresh time as if refresh check has failed.
* Setting this to the retry time will do that. XXXMLG
* If we are successful it will be reset using zone->refresh.
*/
isc_interval_set(&i, isc_random_jitter(zone->retry, zone->retry / 4),
0);
result = isc_time_nowplusinterval(&zone->refreshtime, &i);
if (result != ISC_R_SUCCESS)
dns_zone_log(zone, ISC_LOG_WARNING,
"isc_time_nowplusinterval() failed: %s",
dns_result_totext(result));
/*
* When lacking user-specified timer values from the SOA,
* do exponential backoff of the retry time up to a
* maximum of six hours.
*/
if (! DNS_ZONE_FLAG(zone, DNS_ZONEFLG_HAVETIMERS))
zone->retry = ISC_MIN(zone->retry * 2, 6 * 3600);
zone->curmaster = 0;
for (j = 0; j < zone->masterscnt; j++)
zone->mastersok[j] = false;
/* initiate soa query */
queue_soa_query(zone);
unlock:
UNLOCK_ZONE(zone);
}
isc_result_t
dns_zone_flush(dns_zone_t *zone) {
isc_result_t result = ISC_R_SUCCESS;
bool dumping;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_FLUSH);
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP) &&
zone->masterfile != NULL) {
result = ISC_R_ALREADYRUNNING;
dumping = was_dumping(zone);
} else
dumping = true;
UNLOCK_ZONE(zone);
if (!dumping)
result = zone_dump(zone, false); /* Unknown task. */
return (result);
}
isc_result_t
dns_zone_dump(dns_zone_t *zone) {
isc_result_t result = ISC_R_ALREADYRUNNING;
bool dumping;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
dumping = was_dumping(zone);
UNLOCK_ZONE(zone);
if (!dumping)
result = zone_dump(zone, false); /* Unknown task. */
return (result);
}
static void
zone_needdump(dns_zone_t *zone, unsigned int delay) {
const char me[] = "zone_needdump";
isc_time_t dumptime;
isc_time_t now;
/*
* 'zone' locked by caller
*/
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(LOCKED_ZONE(zone));
ENTER;
/*
* Do we have a place to dump to and are we loaded?
*/
if (zone->masterfile == NULL ||
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED) == 0)
return;
TIME_NOW(&now);
/* add some noise */
DNS_ZONE_JITTER_ADD(&now, delay, &dumptime);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDDUMP);
if (isc_time_isepoch(&zone->dumptime) ||
isc_time_compare(&zone->dumptime, &dumptime) > 0)
zone->dumptime = dumptime;
if (zone->task != NULL)
zone_settimer(zone, &now);
}
static void
dump_done(void *arg, isc_result_t result) {
const char me[] = "dump_done";
dns_zone_t *zone = arg;
dns_zone_t *secure = NULL;
dns_db_t *db;
dns_dbversion_t *version;
bool again = false;
bool compact = false;
uint32_t serial;
isc_result_t tresult;
REQUIRE(DNS_ZONE_VALID(zone));
ENTER;
if (result == ISC_R_SUCCESS && zone->journal != NULL &&
zone->journalsize != -1) {
/*
* We don't own these, zone->dctx must stay valid.
*/
db = dns_dumpctx_db(zone->dctx);
version = dns_dumpctx_version(zone->dctx);
tresult = dns_db_getsoaserial(db, version, &serial);
/*
* Handle lock order inversion.
*/
again:
LOCK_ZONE(zone);
if (inline_raw(zone)) {
secure = zone->secure;
INSIST(secure != zone);
TRYLOCK_ZONE(result, secure);
if (result != ISC_R_SUCCESS) {
UNLOCK_ZONE(zone);
secure = NULL;
#if ISC_PLATFORM_USETHREADS
isc_thread_yield();
#endif
goto again;
}
}
/*
* If there is a secure version of this zone
* use its serial if it is less than ours.
*/
if (tresult == ISC_R_SUCCESS && secure != NULL) {
uint32_t sserial;
isc_result_t mresult;
ZONEDB_LOCK(&secure->dblock, isc_rwlocktype_read);
if (secure->db != NULL) {
mresult = dns_db_getsoaserial(zone->secure->db,
NULL, &sserial);
if (mresult == ISC_R_SUCCESS &&
isc_serial_lt(sserial, serial))
serial = sserial;
}
ZONEDB_UNLOCK(&secure->dblock, isc_rwlocktype_read);
}
if (secure != NULL)
UNLOCK_ZONE(secure);
UNLOCK_ZONE(zone);
/*
* Note: we are task locked here so we can test
* zone->xfr safely.
*/
if (tresult == ISC_R_SUCCESS && zone->xfr == NULL) {
tresult = dns_journal_compact(zone->mctx,
zone->journal,
serial,
zone->journalsize);
switch (tresult) {
case ISC_R_SUCCESS:
case ISC_R_NOSPACE:
case ISC_R_NOTFOUND:
dns_zone_log(zone, ISC_LOG_DEBUG(3),
"dns_journal_compact: %s",
dns_result_totext(tresult));
break;
default:
dns_zone_log(zone, ISC_LOG_ERROR,
"dns_journal_compact failed: %s",
dns_result_totext(tresult));
break;
}
} else if (tresult == ISC_R_SUCCESS) {
compact = true;
zone->compact_serial = serial;
}
}
LOCK_ZONE(zone);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_DUMPING);
if (compact)
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDCOMPACT);
if (result != ISC_R_SUCCESS && result != ISC_R_CANCELED) {
/*
* Try again in a short while.
*/
zone_needdump(zone, DNS_DUMP_DELAY);
} else if (result == ISC_R_SUCCESS &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FLUSH) &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP) &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED)) {
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDDUMP);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_DUMPING);
isc_time_settoepoch(&zone->dumptime);
again = true;
} else if (result == ISC_R_SUCCESS)
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_FLUSH);
if (zone->dctx != NULL)
dns_dumpctx_detach(&zone->dctx);
zonemgr_putio(&zone->writeio);
UNLOCK_ZONE(zone);
if (again)
(void)zone_dump(zone, false);
dns_zone_idetach(&zone);
}
static isc_result_t
zone_dump(dns_zone_t *zone, bool compact) {
const char me[] = "zone_dump";
isc_result_t result;
dns_dbversion_t *version = NULL;
bool again;
dns_db_t *db = NULL;
char *masterfile = NULL;
dns_masterformat_t masterformat = dns_masterformat_none;
/*
* 'compact' MUST only be set if we are task locked.
*/
REQUIRE(DNS_ZONE_VALID(zone));
ENTER;
redo:
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL)
dns_db_attach(zone->db, &db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
LOCK_ZONE(zone);
if (zone->masterfile != NULL) {
masterfile = isc_mem_strdup(zone->mctx, zone->masterfile);
masterformat = zone->masterformat;
}
UNLOCK_ZONE(zone);
if (db == NULL) {
result = DNS_R_NOTLOADED;
goto fail;
}
if (masterfile == NULL) {
result = DNS_R_NOMASTERFILE;
goto fail;
}
if (compact && zone->type != dns_zone_stub) {
dns_zone_t *dummy = NULL;
LOCK_ZONE(zone);
zone_iattach(zone, &dummy);
result = zonemgr_getio(zone->zmgr, false, zone->task,
zone_gotwritehandle, zone,
&zone->writeio);
if (result != ISC_R_SUCCESS)
zone_idetach(&dummy);
else
result = DNS_R_CONTINUE;
UNLOCK_ZONE(zone);
} else {
const dns_master_style_t *output_style;
dns_masterrawheader_t rawdata;
dns_db_currentversion(db, &version);
dns_master_initrawheader(&rawdata);
if (inline_secure(zone))
get_raw_serial(zone->raw, &rawdata);
if (zone->type == dns_zone_key)
output_style = &dns_master_style_keyzone;
else
output_style = &dns_master_style_default;
result = dns_master_dump3(zone->mctx, db, version,
output_style, masterfile,
masterformat, &rawdata);
dns_db_closeversion(db, &version, false);
}
fail:
if (db != NULL)
dns_db_detach(&db);
if (masterfile != NULL)
isc_mem_free(zone->mctx, masterfile);
masterfile = NULL;
if (result == DNS_R_CONTINUE)
return (ISC_R_SUCCESS); /* XXXMPA */
again = false;
LOCK_ZONE(zone);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_DUMPING);
if (result != ISC_R_SUCCESS) {
/*
* Try again in a short while.
*/
zone_needdump(zone, DNS_DUMP_DELAY);
} else if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FLUSH) &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP) &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED)) {
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDDUMP);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_DUMPING);
isc_time_settoepoch(&zone->dumptime);
again = true;
} else
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_FLUSH);
UNLOCK_ZONE(zone);
if (again)
goto redo;
return (result);
}
static isc_result_t
dumptostream(dns_zone_t *zone, FILE *fd, const dns_master_style_t *style,
dns_masterformat_t format, const uint32_t rawversion)
{
isc_result_t result;
dns_dbversion_t *version = NULL;
dns_db_t *db = NULL;
dns_masterrawheader_t rawdata;
REQUIRE(DNS_ZONE_VALID(zone));
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL)
dns_db_attach(zone->db, &db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
if (db == NULL)
return (DNS_R_NOTLOADED);
dns_db_currentversion(db, &version);
dns_master_initrawheader(&rawdata);
if (rawversion == 0)
rawdata.flags |= DNS_MASTERRAW_COMPAT;
else if (inline_secure(zone))
get_raw_serial(zone->raw, &rawdata);
else if (zone->sourceserialset) {
rawdata.flags = DNS_MASTERRAW_SOURCESERIALSET;
rawdata.sourceserial = zone->sourceserial;
}
result = dns_master_dumptostream3(zone->mctx, db, version, style,
format, &rawdata, fd);
dns_db_closeversion(db, &version, false);
dns_db_detach(&db);
return (result);
}
isc_result_t
dns_zone_dumptostream3(dns_zone_t *zone, FILE *fd, dns_masterformat_t format,
const dns_master_style_t *style,
const uint32_t rawversion)
{
return (dumptostream(zone, fd, style, format, rawversion));
}
isc_result_t
dns_zone_dumptostream2(dns_zone_t *zone, FILE *fd, dns_masterformat_t format,
const dns_master_style_t *style) {
return (dumptostream(zone, fd, style, format, DNS_RAWFORMAT_VERSION));
}
isc_result_t
dns_zone_dumptostream(dns_zone_t *zone, FILE *fd) {
return (dumptostream(zone, fd, &dns_master_style_default,
dns_masterformat_text, 0));
}
isc_result_t
dns_zone_fulldumptostream(dns_zone_t *zone, FILE *fd) {
return (dumptostream(zone, fd, &dns_master_style_full,
dns_masterformat_text, 0));
}
void
dns_zone_unload(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone_unload(zone);
UNLOCK_ZONE(zone);
}
static void
notify_cancel(dns_zone_t *zone) {
dns_notify_t *notify;
/*
* 'zone' locked by caller.
*/
REQUIRE(LOCKED_ZONE(zone));
for (notify = ISC_LIST_HEAD(zone->notifies);
notify != NULL;
notify = ISC_LIST_NEXT(notify, link)) {
if (notify->find != NULL)
dns_adb_cancelfind(notify->find);
if (notify->request != NULL)
dns_request_cancel(notify->request);
}
}
static void
forward_cancel(dns_zone_t *zone) {
dns_forward_t *forward;
/*
* 'zone' locked by caller.
*/
REQUIRE(LOCKED_ZONE(zone));
for (forward = ISC_LIST_HEAD(zone->forwards);
forward != NULL;
forward = ISC_LIST_NEXT(forward, link)) {
if (forward->request != NULL)
dns_request_cancel(forward->request);
}
}
static void
zone_unload(dns_zone_t *zone) {
/*
* 'zone' locked by caller.
*/
REQUIRE(LOCKED_ZONE(zone));
if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FLUSH) ||
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DUMPING)) {
if (zone->writeio != NULL)
zonemgr_cancelio(zone->writeio);
if (zone->dctx != NULL)
dns_dumpctx_cancel(zone->dctx);
}
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_write);
zone_detachdb(zone);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_write);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_LOADED);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDDUMP);
}
void
dns_zone_setminrefreshtime(dns_zone_t *zone, uint32_t val) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(val > 0);
zone->minrefresh = val;
}
void
dns_zone_setmaxrefreshtime(dns_zone_t *zone, uint32_t val) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(val > 0);
zone->maxrefresh = val;
}
void
dns_zone_setminretrytime(dns_zone_t *zone, uint32_t val) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(val > 0);
zone->minretry = val;
}
void
dns_zone_setmaxretrytime(dns_zone_t *zone, uint32_t val) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(val > 0);
zone->maxretry = val;
}
uint32_t
dns_zone_getmaxrecords(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->maxrecords);
}
void
dns_zone_setmaxrecords(dns_zone_t *zone, uint32_t val) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->maxrecords = val;
}
static bool
notify_isqueued(dns_zone_t *zone, unsigned int flags, dns_name_t *name,
isc_sockaddr_t *addr, dns_tsigkey_t *key)
{
dns_notify_t *notify;
dns_zonemgr_t *zmgr;
isc_result_t result;
for (notify = ISC_LIST_HEAD(zone->notifies);
notify != NULL;
notify = ISC_LIST_NEXT(notify, link)) {
if (notify->request != NULL)
continue;
if (name != NULL && dns_name_dynamic(¬ify->ns) &&
dns_name_equal(name, ¬ify->ns))
goto requeue;
if (addr != NULL && isc_sockaddr_equal(addr, ¬ify->dst) &&
notify->key == key)
goto requeue;
}
return (false);
requeue:
/*
* If we are enqueued on the startup ratelimiter and this is
* not a startup notify, re-enqueue on the normal notify
* ratelimiter.
*/
if (notify->event != NULL && (flags & DNS_NOTIFY_STARTUP) == 0 &&
(notify->flags & DNS_NOTIFY_STARTUP) != 0) {
zmgr = notify->zone->zmgr;
result = isc_ratelimiter_dequeue(zmgr->startupnotifyrl,
notify->event);
if (result != ISC_R_SUCCESS)
return (true);
notify->flags &= ~DNS_NOTIFY_STARTUP;
result = isc_ratelimiter_enqueue(notify->zone->zmgr->notifyrl,
notify->zone->task,
¬ify->event);
if (result != ISC_R_SUCCESS) {
isc_event_free(¬ify->event);
return (false);
}
}
return (true);
}
static bool
notify_isself(dns_zone_t *zone, isc_sockaddr_t *dst) {
dns_tsigkey_t *key = NULL;
isc_sockaddr_t src;
isc_sockaddr_t any;
bool isself;
isc_netaddr_t dstaddr;
isc_result_t result;
if (zone->view == NULL || zone->isself == NULL)
return (false);
switch (isc_sockaddr_pf(dst)) {
case PF_INET:
src = zone->notifysrc4;
isc_sockaddr_any(&any);
break;
case PF_INET6:
src = zone->notifysrc6;
isc_sockaddr_any6(&any);
break;
default:
return (false);
}
/*
* When sending from any the kernel will assign a source address
* that matches the destination address.
*/
if (isc_sockaddr_eqaddr(&any, &src))
src = *dst;
isc_netaddr_fromsockaddr(&dstaddr, dst);
result = dns_view_getpeertsig(zone->view, &dstaddr, &key);
if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND)
return (false);
isself = (zone->isself)(zone->view, key, &src, dst, zone->rdclass,
zone->isselfarg);
if (key != NULL)
dns_tsigkey_detach(&key);
return (isself);
}
static void
notify_destroy(dns_notify_t *notify, bool locked) {
isc_mem_t *mctx;
REQUIRE(DNS_NOTIFY_VALID(notify));
if (notify->zone != NULL) {
if (!locked)
LOCK_ZONE(notify->zone);
REQUIRE(LOCKED_ZONE(notify->zone));
if (ISC_LINK_LINKED(notify, link))
ISC_LIST_UNLINK(notify->zone->notifies, notify, link);
if (!locked)
UNLOCK_ZONE(notify->zone);
if (locked)
zone_idetach(¬ify->zone);
else
dns_zone_idetach(¬ify->zone);
}
if (notify->find != NULL)
dns_adb_destroyfind(¬ify->find);
if (notify->request != NULL)
dns_request_destroy(¬ify->request);
if (dns_name_dynamic(¬ify->ns))
dns_name_free(¬ify->ns, notify->mctx);
if (notify->key != NULL)
dns_tsigkey_detach(¬ify->key);
mctx = notify->mctx;
isc_mem_put(notify->mctx, notify, sizeof(*notify));
isc_mem_detach(&mctx);
}
static isc_result_t
notify_create(isc_mem_t *mctx, unsigned int flags, dns_notify_t **notifyp) {
dns_notify_t *notify;
REQUIRE(notifyp != NULL && *notifyp == NULL);
notify = isc_mem_get(mctx, sizeof(*notify));
if (notify == NULL)
return (ISC_R_NOMEMORY);
notify->mctx = NULL;
isc_mem_attach(mctx, ¬ify->mctx);
notify->flags = flags;
notify->zone = NULL;
notify->find = NULL;
notify->request = NULL;
notify->key = NULL;
notify->event = NULL;
isc_sockaddr_any(¬ify->dst);
dns_name_init(¬ify->ns, NULL);
ISC_LINK_INIT(notify, link);
notify->magic = NOTIFY_MAGIC;
*notifyp = notify;
return (ISC_R_SUCCESS);
}
/*
* XXXAG should check for DNS_ZONEFLG_EXITING
*/
static void
process_adb_event(isc_task_t *task, isc_event_t *ev) {
dns_notify_t *notify;
isc_eventtype_t result;
UNUSED(task);
notify = ev->ev_arg;
REQUIRE(DNS_NOTIFY_VALID(notify));
INSIST(task == notify->zone->task);
result = ev->ev_type;
isc_event_free(&ev);
if (result == DNS_EVENT_ADBMOREADDRESSES) {
dns_adb_destroyfind(¬ify->find);
notify_find_address(notify);
return;
}
if (result == DNS_EVENT_ADBNOMOREADDRESSES) {
LOCK_ZONE(notify->zone);
notify_send(notify);
UNLOCK_ZONE(notify->zone);
}
notify_destroy(notify, false);
}
static void
notify_find_address(dns_notify_t *notify) {
isc_result_t result;
unsigned int options;
REQUIRE(DNS_NOTIFY_VALID(notify));
options = DNS_ADBFIND_WANTEVENT | DNS_ADBFIND_INET |
DNS_ADBFIND_INET6 | DNS_ADBFIND_RETURNLAME;
if (notify->zone->view->adb == NULL)
goto destroy;
result = dns_adb_createfind(notify->zone->view->adb,
notify->zone->task,
process_adb_event, notify,
¬ify->ns, dns_rootname, 0,
options, 0, NULL,
notify->zone->view->dstport,
¬ify->find);
/* Something failed? */
if (result != ISC_R_SUCCESS)
goto destroy;
/* More addresses pending? */
if ((notify->find->options & DNS_ADBFIND_WANTEVENT) != 0)
return;
/* We have as many addresses as we can get. */
LOCK_ZONE(notify->zone);
notify_send(notify);
UNLOCK_ZONE(notify->zone);
destroy:
notify_destroy(notify, false);
}
static isc_result_t
notify_send_queue(dns_notify_t *notify, bool startup) {
isc_event_t *e;
isc_result_t result;
INSIST(notify->event == NULL);
e = isc_event_allocate(notify->mctx, NULL, DNS_EVENT_NOTIFYSENDTOADDR,
notify_send_toaddr, notify, sizeof(isc_event_t));
if (e == NULL)
return (ISC_R_NOMEMORY);
if (startup)
notify->event = e;
e->ev_arg = notify;
e->ev_sender = NULL;
result = isc_ratelimiter_enqueue(startup
? notify->zone->zmgr->startupnotifyrl
: notify->zone->zmgr->notifyrl,
notify->zone->task, &e);
if (result != ISC_R_SUCCESS) {
isc_event_free(&e);
notify->event = NULL;
}
return (result);
}
static void
notify_send_toaddr(isc_task_t *task, isc_event_t *event) {
dns_notify_t *notify;
isc_result_t result;
dns_message_t *message = NULL;
isc_netaddr_t dstip;
dns_tsigkey_t *key = NULL;
char addrbuf[ISC_SOCKADDR_FORMATSIZE];
isc_sockaddr_t src;
unsigned int options, timeout;
bool have_notifysource = false;
bool have_notifydscp = false;
isc_dscp_t dscp = -1;
notify = event->ev_arg;
REQUIRE(DNS_NOTIFY_VALID(notify));
UNUSED(task);
LOCK_ZONE(notify->zone);
notify->event = NULL;
if (DNS_ZONE_FLAG(notify->zone, DNS_ZONEFLG_LOADED) == 0) {
result = ISC_R_CANCELED;
goto cleanup;
}
if ((event->ev_attributes & ISC_EVENTATTR_CANCELED) != 0 ||
DNS_ZONE_FLAG(notify->zone, DNS_ZONEFLG_EXITING) ||
notify->zone->view->requestmgr == NULL ||
notify->zone->db == NULL) {
result = ISC_R_CANCELED;
goto cleanup;
}
/*
* The raw IPv4 address should also exist. Don't send to the
* mapped form.
*/
if (isc_sockaddr_pf(¬ify->dst) == PF_INET6 &&
IN6_IS_ADDR_V4MAPPED(¬ify->dst.type.sin6.sin6_addr)) {
isc_sockaddr_format(¬ify->dst, addrbuf, sizeof(addrbuf));
notify_log(notify->zone, ISC_LOG_DEBUG(3),
"notify: ignoring IPv6 mapped IPV4 address: %s",
addrbuf);
result = ISC_R_CANCELED;
goto cleanup;
}
result = notify_createmessage(notify->zone, notify->flags, &message);
if (result != ISC_R_SUCCESS)
goto cleanup;
isc_sockaddr_format(¬ify->dst, addrbuf, sizeof(addrbuf));
if (notify->key != NULL) {
/* Transfer ownership of key */
key = notify->key;
notify->key = NULL;
} else {
isc_netaddr_fromsockaddr(&dstip, ¬ify->dst);
result = dns_view_getpeertsig(notify->zone->view, &dstip, &key);
if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND) {
notify_log(notify->zone, ISC_LOG_ERROR,
"NOTIFY to %s not sent. "
"Peer TSIG key lookup failure.", addrbuf);
goto cleanup_message;
}
}
/* XXX: should we log the tsig key too? */
notify_log(notify->zone, ISC_LOG_DEBUG(3), "sending notify to %s",
addrbuf);
options = 0;
if (notify->zone->view->peers != NULL) {
dns_peer_t *peer = NULL;
bool usetcp = false;
result = dns_peerlist_peerbyaddr(notify->zone->view->peers,
&dstip, &peer);
if (result == ISC_R_SUCCESS) {
result = dns_peer_getnotifysource(peer, &src);
if (result == ISC_R_SUCCESS)
have_notifysource = true;
dns_peer_getnotifydscp(peer, &dscp);
if (dscp != -1)
have_notifydscp = true;
result = dns_peer_getforcetcp(peer, &usetcp);
if (result == ISC_R_SUCCESS && usetcp)
options |= DNS_FETCHOPT_TCP;
}
}
switch (isc_sockaddr_pf(¬ify->dst)) {
case PF_INET:
if (!have_notifysource)
src = notify->zone->notifysrc4;
if (!have_notifydscp)
dscp = notify->zone->notifysrc4dscp;
break;
case PF_INET6:
if (!have_notifysource)
src = notify->zone->notifysrc6;
if (!have_notifydscp)
dscp = notify->zone->notifysrc6dscp;
break;
default:
result = ISC_R_NOTIMPLEMENTED;
goto cleanup_key;
}
timeout = 15;
if (DNS_ZONE_FLAG(notify->zone, DNS_ZONEFLG_DIALNOTIFY))
timeout = 30;
result = dns_request_createvia4(notify->zone->view->requestmgr,
message, &src, ¬ify->dst, dscp,
options, key, timeout * 3, timeout,
0, notify->zone->task, notify_done,
notify, ¬ify->request);
if (result == ISC_R_SUCCESS) {
if (isc_sockaddr_pf(¬ify->dst) == AF_INET) {
inc_stats(notify->zone,
dns_zonestatscounter_notifyoutv4);
} else {
inc_stats(notify->zone,
dns_zonestatscounter_notifyoutv6);
}
}
cleanup_key:
if (key != NULL)
dns_tsigkey_detach(&key);
cleanup_message:
dns_message_destroy(&message);
cleanup:
UNLOCK_ZONE(notify->zone);
isc_event_free(&event);
if (result != ISC_R_SUCCESS)
notify_destroy(notify, false);
}
static void
notify_send(dns_notify_t *notify) {
dns_adbaddrinfo_t *ai;
isc_sockaddr_t dst;
isc_result_t result;
dns_notify_t *newnotify = NULL;
unsigned int flags;
bool startup;
/*
* Zone lock held by caller.
*/
REQUIRE(DNS_NOTIFY_VALID(notify));
REQUIRE(LOCKED_ZONE(notify->zone));
if (DNS_ZONE_FLAG(notify->zone, DNS_ZONEFLG_EXITING))
return;
for (ai = ISC_LIST_HEAD(notify->find->list);
ai != NULL;
ai = ISC_LIST_NEXT(ai, publink)) {
dst = ai->sockaddr;
if (notify_isqueued(notify->zone, notify->flags, NULL, &dst,
NULL))
continue;
if (notify_isself(notify->zone, &dst))
continue;
newnotify = NULL;
flags = notify->flags & DNS_NOTIFY_NOSOA;
result = notify_create(notify->mctx, flags, &newnotify);
if (result != ISC_R_SUCCESS)
goto cleanup;
zone_iattach(notify->zone, &newnotify->zone);
ISC_LIST_APPEND(newnotify->zone->notifies, newnotify, link);
newnotify->dst = dst;
startup = ((notify->flags & DNS_NOTIFY_STARTUP) != 0);
result = notify_send_queue(newnotify, startup);
if (result != ISC_R_SUCCESS)
goto cleanup;
newnotify = NULL;
}
cleanup:
if (newnotify != NULL)
notify_destroy(newnotify, true);
}
void
dns_zone_notify(dns_zone_t *zone) {
isc_time_t now;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDNOTIFY);
TIME_NOW(&now);
zone_settimer(zone, &now);
UNLOCK_ZONE(zone);
}
static void
zone_notify(dns_zone_t *zone, isc_time_t *now) {
dns_dbnode_t *node = NULL;
dns_db_t *zonedb = NULL;
dns_dbversion_t *version = NULL;
dns_name_t *origin = NULL;
dns_name_t master;
dns_rdata_ns_t ns;
dns_rdata_soa_t soa;
uint32_t serial;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_t nsrdset;
dns_rdataset_t soardset;
isc_result_t result;
unsigned int i;
isc_sockaddr_t dst;
bool isqueued;
dns_notifytype_t notifytype;
unsigned int flags = 0;
bool loggednotify = false;
bool startup;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
startup = !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDNOTIFY);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDNOTIFY);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDSTARTUPNOTIFY);
notifytype = zone->notifytype;
DNS_ZONE_TIME_ADD(now, zone->notifydelay, &zone->notifytime);
UNLOCK_ZONE(zone);
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING) ||
! DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED))
return;
if (notifytype == dns_notifytype_no)
return;
if (notifytype == dns_notifytype_masteronly &&
zone->type != dns_zone_master)
return;
origin = &zone->origin;
/*
* If the zone is dialup we are done as we don't want to send
* the current soa so as to force a refresh query.
*/
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALNOTIFY))
flags |= DNS_NOTIFY_NOSOA;
/*
* Record that this was a notify due to starting up.
*/
if (startup)
flags |= DNS_NOTIFY_STARTUP;
/*
* Get SOA RRset.
*/
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL)
dns_db_attach(zone->db, &zonedb);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
if (zonedb == NULL)
return;
dns_db_currentversion(zonedb, &version);
result = dns_db_findnode(zonedb, origin, false, &node);
if (result != ISC_R_SUCCESS)
goto cleanup1;
dns_rdataset_init(&soardset);
result = dns_db_findrdataset(zonedb, node, version, dns_rdatatype_soa,
dns_rdatatype_none, 0, &soardset, NULL);
if (result != ISC_R_SUCCESS)
goto cleanup2;
/*
* Find serial and master server's name.
*/
dns_name_init(&master, NULL);
result = dns_rdataset_first(&soardset);
if (result != ISC_R_SUCCESS)
goto cleanup3;
dns_rdataset_current(&soardset, &rdata);
result = dns_rdata_tostruct(&rdata, &soa, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_rdata_reset(&rdata);
result = dns_name_dup(&soa.origin, zone->mctx, &master);
serial = soa.serial;
dns_rdataset_disassociate(&soardset);
if (result != ISC_R_SUCCESS)
goto cleanup3;
/*
* Enqueue notify requests for 'also-notify' servers.
*/
LOCK_ZONE(zone);
for (i = 0; i < zone->notifycnt; i++) {
dns_tsigkey_t *key = NULL;
dns_notify_t *notify = NULL;
if ((zone->notifykeynames != NULL) &&
(zone->notifykeynames[i] != NULL)) {
dns_view_t *view = dns_zone_getview(zone);
dns_name_t *keyname = zone->notifykeynames[i];
(void)dns_view_gettsig(view, keyname, &key);
}
dst = zone->notify[i];
if (notify_isqueued(zone, flags, NULL, &dst, key)) {
if (key != NULL)
dns_tsigkey_detach(&key);
continue;
}
result = notify_create(zone->mctx, flags, ¬ify);
if (result != ISC_R_SUCCESS) {
if (key != NULL)
dns_tsigkey_detach(&key);
continue;
}
zone_iattach(zone, ¬ify->zone);
notify->dst = dst;
INSIST(notify->key == NULL);
if (key != NULL) {
notify->key = key;
key = NULL;
}
ISC_LIST_APPEND(zone->notifies, notify, link);
result = notify_send_queue(notify, startup);
if (result != ISC_R_SUCCESS)
notify_destroy(notify, true);
if (!loggednotify) {
notify_log(zone, ISC_LOG_INFO,
"sending notifies (serial %u)",
serial);
loggednotify = true;
}
}
UNLOCK_ZONE(zone);
if (notifytype == dns_notifytype_explicit)
goto cleanup3;
/*
* Process NS RRset to generate notifies.
*/
dns_rdataset_init(&nsrdset);
result = dns_db_findrdataset(zonedb, node, version, dns_rdatatype_ns,
dns_rdatatype_none, 0, &nsrdset, NULL);
if (result != ISC_R_SUCCESS)
goto cleanup3;
result = dns_rdataset_first(&nsrdset);
while (result == ISC_R_SUCCESS) {
dns_notify_t *notify = NULL;
dns_rdataset_current(&nsrdset, &rdata);
result = dns_rdata_tostruct(&rdata, &ns, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_rdata_reset(&rdata);
/*
* Don't notify the master server unless explicitly
* configured to do so.
*/
if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_NOTIFYTOSOA) &&
dns_name_compare(&master, &ns.name) == 0) {
result = dns_rdataset_next(&nsrdset);
continue;
}
if (!loggednotify) {
notify_log(zone, ISC_LOG_INFO,
"sending notifies (serial %u)",
serial);
loggednotify = true;
}
LOCK_ZONE(zone);
isqueued = notify_isqueued(zone, flags, &ns.name, NULL, NULL);
UNLOCK_ZONE(zone);
if (isqueued) {
result = dns_rdataset_next(&nsrdset);
continue;
}
result = notify_create(zone->mctx, flags, ¬ify);
if (result != ISC_R_SUCCESS)
continue;
dns_zone_iattach(zone, ¬ify->zone);
result = dns_name_dup(&ns.name, zone->mctx, ¬ify->ns);
if (result != ISC_R_SUCCESS) {
LOCK_ZONE(zone);
notify_destroy(notify, true);
UNLOCK_ZONE(zone);
continue;
}
LOCK_ZONE(zone);
ISC_LIST_APPEND(zone->notifies, notify, link);
UNLOCK_ZONE(zone);
notify_find_address(notify);
result = dns_rdataset_next(&nsrdset);
}
dns_rdataset_disassociate(&nsrdset);
cleanup3:
if (dns_name_dynamic(&master))
dns_name_free(&master, zone->mctx);
cleanup2:
dns_db_detachnode(zonedb, &node);
cleanup1:
dns_db_closeversion(zonedb, &version, false);
dns_db_detach(&zonedb);
}
/***
*** Private
***/
static inline isc_result_t
save_nsrrset(dns_message_t *message, dns_name_t *name,
dns_db_t *db, dns_dbversion_t *version)
{
dns_rdataset_t *nsrdataset = NULL;
dns_rdataset_t *rdataset = NULL;
dns_dbnode_t *node = NULL;
dns_rdata_ns_t ns;
isc_result_t result;
dns_rdata_t rdata = DNS_RDATA_INIT;
/*
* Extract NS RRset from message.
*/
result = dns_message_findname(message, DNS_SECTION_ANSWER, name,
dns_rdatatype_ns, dns_rdatatype_none,
NULL, &nsrdataset);
if (result != ISC_R_SUCCESS)
goto fail;
/*
* Add NS rdataset.
*/
result = dns_db_findnode(db, name, true, &node);
if (result != ISC_R_SUCCESS)
goto fail;
result = dns_db_addrdataset(db, node, version, 0,
nsrdataset, 0, NULL);
dns_db_detachnode(db, &node);
if (result != ISC_R_SUCCESS)
goto fail;
/*
* Add glue rdatasets.
*/
for (result = dns_rdataset_first(nsrdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(nsrdataset)) {
dns_rdataset_current(nsrdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &ns, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_rdata_reset(&rdata);
if (!dns_name_issubdomain(&ns.name, name))
continue;
rdataset = NULL;
result = dns_message_findname(message, DNS_SECTION_ADDITIONAL,
&ns.name, dns_rdatatype_aaaa,
dns_rdatatype_none, NULL,
&rdataset);
if (result == ISC_R_SUCCESS) {
result = dns_db_findnode(db, &ns.name,
true, &node);
if (result != ISC_R_SUCCESS)
goto fail;
result = dns_db_addrdataset(db, node, version, 0,
rdataset, 0, NULL);
dns_db_detachnode(db, &node);
if (result != ISC_R_SUCCESS)
goto fail;
}
rdataset = NULL;
result = dns_message_findname(message, DNS_SECTION_ADDITIONAL,
&ns.name, dns_rdatatype_a,
dns_rdatatype_none, NULL,
&rdataset);
if (result == ISC_R_SUCCESS) {
result = dns_db_findnode(db, &ns.name,
true, &node);
if (result != ISC_R_SUCCESS)
goto fail;
result = dns_db_addrdataset(db, node, version, 0,
rdataset, 0, NULL);
dns_db_detachnode(db, &node);
if (result != ISC_R_SUCCESS)
goto fail;
}
}
if (result != ISC_R_NOMORE)
goto fail;
return (ISC_R_SUCCESS);
fail:
return (result);
}
static void
stub_callback(isc_task_t *task, isc_event_t *event) {
const char me[] = "stub_callback";
dns_requestevent_t *revent = (dns_requestevent_t *)event;
dns_stub_t *stub = NULL;
dns_message_t *msg = NULL;
dns_zone_t *zone = NULL;
char master[ISC_SOCKADDR_FORMATSIZE];
char source[ISC_SOCKADDR_FORMATSIZE];
uint32_t nscnt, cnamecnt, refresh, retry, expire;
isc_result_t result;
isc_time_t now;
bool exiting = false;
isc_interval_t i;
unsigned int j, soacount;
stub = revent->ev_arg;
INSIST(DNS_STUB_VALID(stub));
UNUSED(task);
zone = stub->zone;
ENTER;
TIME_NOW(&now);
LOCK_ZONE(zone);
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING)) {
zone_debuglog(zone, me, 1, "exiting");
exiting = true;
goto next_master;
}
isc_sockaddr_format(&zone->masteraddr, master, sizeof(master));
isc_sockaddr_format(&zone->sourceaddr, source, sizeof(source));
if (revent->result != ISC_R_SUCCESS) {
if (revent->result == ISC_R_TIMEDOUT &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOEDNS)) {
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOEDNS);
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"refreshing stub: timeout retrying "
" without EDNS master %s (source %s)",
master, source);
goto same_master;
}
dns_zonemgr_unreachableadd(zone->zmgr, &zone->masteraddr,
&zone->sourceaddr, &now);
dns_zone_log(zone, ISC_LOG_INFO,
"could not refresh stub from master %s"
" (source %s): %s", master, source,
dns_result_totext(revent->result));
goto next_master;
}
result = dns_message_create(zone->mctx, DNS_MESSAGE_INTENTPARSE, &msg);
if (result != ISC_R_SUCCESS)
goto next_master;
result = dns_request_getresponse(revent->request, msg, 0);
if (result != ISC_R_SUCCESS)
goto next_master;
/*
* Unexpected rcode.
*/
if (msg->rcode != dns_rcode_noerror) {
char rcode[128];
isc_buffer_t rb;
isc_buffer_init(&rb, rcode, sizeof(rcode));
(void)dns_rcode_totext(msg->rcode, &rb);
if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOEDNS) &&
(msg->rcode == dns_rcode_servfail ||
msg->rcode == dns_rcode_notimp ||
msg->rcode == dns_rcode_formerr)) {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"refreshing stub: rcode (%.*s) retrying "
"without EDNS master %s (source %s)",
(int)rb.used, rcode, master, source);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOEDNS);
goto same_master;
}
dns_zone_log(zone, ISC_LOG_INFO,
"refreshing stub: "
"unexpected rcode (%.*s) from %s (source %s)",
(int)rb.used, rcode, master, source);
goto next_master;
}
/*
* We need complete messages.
*/
if ((msg->flags & DNS_MESSAGEFLAG_TC) != 0) {
if (dns_request_usedtcp(revent->request)) {
dns_zone_log(zone, ISC_LOG_INFO,
"refreshing stub: truncated TCP "
"response from master %s (source %s)",
master, source);
goto next_master;
}
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_USEVC);
goto same_master;
}
/*
* If non-auth log and next master.
*/
if ((msg->flags & DNS_MESSAGEFLAG_AA) == 0) {
dns_zone_log(zone, ISC_LOG_INFO, "refreshing stub: "
"non-authoritative answer from "
"master %s (source %s)", master, source);
goto next_master;
}
/*
* Sanity checks.
*/
cnamecnt = message_count(msg, DNS_SECTION_ANSWER, dns_rdatatype_cname);
nscnt = message_count(msg, DNS_SECTION_ANSWER, dns_rdatatype_ns);
if (cnamecnt != 0) {
dns_zone_log(zone, ISC_LOG_INFO,
"refreshing stub: unexpected CNAME response "
"from master %s (source %s)", master, source);
goto next_master;
}
if (nscnt == 0) {
dns_zone_log(zone, ISC_LOG_INFO,
"refreshing stub: no NS records in response "
"from master %s (source %s)", master, source);
goto next_master;
}
/*
* Save answer.
*/
result = save_nsrrset(msg, &zone->origin, stub->db, stub->version);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_INFO,
"refreshing stub: unable to save NS records "
"from master %s (source %s)", master, source);
goto next_master;
}
/*
* Tidy up.
*/
dns_db_closeversion(stub->db, &stub->version, true);
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_write);
if (zone->db == NULL)
zone_attachdb(zone, stub->db);
result = zone_get_from_db(zone, zone->db, NULL, &soacount, NULL,
&refresh, &retry, &expire, NULL, NULL);
if (result == ISC_R_SUCCESS && soacount > 0U) {
zone->refresh = RANGE(refresh, zone->minrefresh,
zone->maxrefresh);
zone->retry = RANGE(retry, zone->minretry, zone->maxretry);
zone->expire = RANGE(expire, zone->refresh + zone->retry,
DNS_MAX_EXPIRE);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_HAVETIMERS);
}
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_write);
dns_db_detach(&stub->db);
dns_message_destroy(&msg);
isc_event_free(&event);
dns_request_destroy(&zone->request);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_REFRESH);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_LOADED);
DNS_ZONE_JITTER_ADD(&now, zone->refresh, &zone->refreshtime);
isc_interval_set(&i, zone->expire, 0);
DNS_ZONE_TIME_ADD(&now, zone->expire, &zone->expiretime);
if (zone->masterfile != NULL)
zone_needdump(zone, 0);
zone_settimer(zone, &now);
goto free_stub;
next_master:
if (stub->version != NULL)
dns_db_closeversion(stub->db, &stub->version, false);
if (stub->db != NULL)
dns_db_detach(&stub->db);
if (msg != NULL)
dns_message_destroy(&msg);
isc_event_free(&event);
dns_request_destroy(&zone->request);
/*
* Skip to next failed / untried master.
*/
do {
zone->curmaster++;
} while (zone->curmaster < zone->masterscnt &&
zone->mastersok[zone->curmaster]);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NOEDNS);
if (exiting || zone->curmaster >= zone->masterscnt) {
bool done = true;
if (!exiting &&
DNS_ZONE_OPTION(zone, DNS_ZONEOPT_USEALTXFRSRC) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEALTXFRSRC)) {
/*
* Did we get a good answer from all the masters?
*/
for (j = 0; j < zone->masterscnt; j++)
if (zone->mastersok[j] == false) {
done = false;
break;
}
} else
done = true;
if (!done) {
zone->curmaster = 0;
/*
* Find the next failed master.
*/
while (zone->curmaster < zone->masterscnt &&
zone->mastersok[zone->curmaster])
zone->curmaster++;
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_USEALTXFRSRC);
} else {
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_REFRESH);
zone_settimer(zone, &now);
goto free_stub;
}
}
queue_soa_query(zone);
goto free_stub;
same_master:
if (msg != NULL)
dns_message_destroy(&msg);
isc_event_free(&event);
dns_request_destroy(&zone->request);
ns_query(zone, NULL, stub);
UNLOCK_ZONE(zone);
goto done;
free_stub:
UNLOCK_ZONE(zone);
stub->magic = 0;
dns_zone_idetach(&stub->zone);
INSIST(stub->db == NULL);
INSIST(stub->version == NULL);
isc_mem_put(stub->mctx, stub, sizeof(*stub));
done:
INSIST(event == NULL);
return;
}
/*
* Get the EDNS EXPIRE option from the response and if it exists trim
* expire to be not more than it.
*/
static void
get_edns_expire(dns_zone_t * zone, dns_message_t *message,
uint32_t *expirep)
{
isc_result_t result;
uint32_t expire;
dns_rdata_t rdata = DNS_RDATA_INIT;
isc_buffer_t optbuf;
uint16_t optcode;
uint16_t optlen;
REQUIRE(expirep != NULL);
REQUIRE(message != NULL);
if (message->opt == NULL)
return;
result = dns_rdataset_first(message->opt);
if (result == ISC_R_SUCCESS) {
dns_rdataset_current(message->opt, &rdata);
isc_buffer_init(&optbuf, rdata.data, rdata.length);
isc_buffer_add(&optbuf, rdata.length);
while (isc_buffer_remaininglength(&optbuf) >= 4) {
optcode = isc_buffer_getuint16(&optbuf);
optlen = isc_buffer_getuint16(&optbuf);
/*
* A EDNS EXPIRE response has a length of 4.
*/
if (optcode != DNS_OPT_EXPIRE || optlen != 4) {
isc_buffer_forward(&optbuf, optlen);
continue;
}
expire = isc_buffer_getuint32(&optbuf);
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"got EDNS EXPIRE of %u", expire);
/*
* Trim *expirep?
*/
if (expire < *expirep)
*expirep = expire;
break;
}
}
}
/*
* Set the file modification time zone->expire seconds before expiretime.
*/
static void
setmodtime(dns_zone_t *zone, isc_time_t *expiretime) {
isc_result_t result;
isc_time_t when;
isc_interval_t i;
isc_interval_set(&i, zone->expire, 0);
result = isc_time_subtract(expiretime, &i, &when);
if (result != ISC_R_SUCCESS)
return;
result = ISC_R_FAILURE;
if (zone->journal != NULL)
result = isc_file_settime(zone->journal, &when);
if (result == ISC_R_SUCCESS &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP))
result = isc_file_settime(zone->masterfile, &when);
else if (result != ISC_R_SUCCESS)
result = isc_file_settime(zone->masterfile, &when);
/*
* Someone removed the file from underneath us!
*/
if (result == ISC_R_FILENOTFOUND) {
zone_needdump(zone, DNS_DUMP_DELAY);
} else if (result != ISC_R_SUCCESS)
dns_zone_log(zone, ISC_LOG_ERROR, "refresh: could not set "
"file modification time of '%s': %s",
zone->masterfile, dns_result_totext(result));
}
/*
* An SOA query has finished (successfully or not).
*/
static void
refresh_callback(isc_task_t *task, isc_event_t *event) {
const char me[] = "refresh_callback";
dns_requestevent_t *revent = (dns_requestevent_t *)event;
dns_zone_t *zone;
dns_message_t *msg = NULL;
uint32_t soacnt, cnamecnt, soacount, nscount;
isc_time_t now;
char master[ISC_SOCKADDR_FORMATSIZE];
char source[ISC_SOCKADDR_FORMATSIZE];
dns_rdataset_t *rdataset = NULL;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdata_soa_t soa;
isc_result_t result;
uint32_t serial, oldserial = 0;
unsigned int j;
bool do_queue_xfrin = false;
zone = revent->ev_arg;
INSIST(DNS_ZONE_VALID(zone));
UNUSED(task);
ENTER;
TIME_NOW(&now);
LOCK_ZONE(zone);
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING)) {
isc_event_free(&event);
dns_request_destroy(&zone->request);
goto detach;
}
/*
* if timeout log and next master;
*/
isc_sockaddr_format(&zone->masteraddr, master, sizeof(master));
isc_sockaddr_format(&zone->sourceaddr, source, sizeof(source));
if (revent->result != ISC_R_SUCCESS) {
if (revent->result == ISC_R_TIMEDOUT &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOEDNS)) {
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOEDNS);
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"refresh: timeout retrying without EDNS "
"master %s (source %s)", master, source);
goto same_master;
}
if (revent->result == ISC_R_TIMEDOUT &&
!dns_request_usedtcp(revent->request)) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: retry limit for "
"master %s exceeded (source %s)",
master, source);
/* Try with slave with TCP. */
if ((zone->type == dns_zone_slave ||
zone->type == dns_zone_redirect) &&
DNS_ZONE_OPTION(zone, DNS_ZONEOPT_TRYTCPREFRESH)) {
if (!dns_zonemgr_unreachable(zone->zmgr,
&zone->masteraddr,
&zone->sourceaddr,
&now))
{
DNS_ZONE_SETFLAG(zone,
DNS_ZONEFLG_SOABEFOREAXFR);
goto tcp_transfer;
}
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"refresh: skipped tcp fallback "
"as master %s (source %s) is "
"unreachable (cached)",
master, source);
}
} else
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: failure trying master "
"%s (source %s): %s", master, source,
dns_result_totext(revent->result));
goto next_master;
}
result = dns_message_create(zone->mctx, DNS_MESSAGE_INTENTPARSE, &msg);
if (result != ISC_R_SUCCESS)
goto next_master;
result = dns_request_getresponse(revent->request, msg, 0);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: failure trying master "
"%s (source %s): %s", master, source,
dns_result_totext(result));
goto next_master;
}
/*
* Unexpected rcode.
*/
if (msg->rcode != dns_rcode_noerror) {
char rcode[128];
isc_buffer_t rb;
isc_buffer_init(&rb, rcode, sizeof(rcode));
(void)dns_rcode_totext(msg->rcode, &rb);
if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOEDNS) &&
(msg->rcode == dns_rcode_servfail ||
msg->rcode == dns_rcode_notimp ||
msg->rcode == dns_rcode_formerr)) {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"refresh: rcode (%.*s) retrying without "
"EDNS master %s (source %s)",
(int)rb.used, rcode, master, source);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOEDNS);
goto same_master;
}
if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOEDNS) &&
msg->rcode == dns_rcode_badvers) {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"refresh: rcode (%.*s) retrying without "
"EDNS EXPIRE OPTION master %s (source %s)",
(int)rb.used, rcode, master, source);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOEDNS);
goto same_master;
}
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: unexpected rcode (%.*s) from "
"master %s (source %s)", (int)rb.used, rcode,
master, source);
/*
* Perhaps AXFR/IXFR is allowed even if SOA queries aren't.
*/
if (msg->rcode == dns_rcode_refused &&
(zone->type == dns_zone_slave ||
zone->type == dns_zone_redirect))
goto tcp_transfer;
goto next_master;
}
/*
* If truncated punt to zone transfer which will query again.
*/
if ((msg->flags & DNS_MESSAGEFLAG_TC) != 0) {
if (zone->type == dns_zone_slave ||
zone->type == dns_zone_redirect) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: truncated UDP answer, "
"initiating TCP zone xfer "
"for master %s (source %s)",
master, source);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_SOABEFOREAXFR);
goto tcp_transfer;
} else {
INSIST(zone->type == dns_zone_stub);
if (dns_request_usedtcp(revent->request)) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: truncated TCP response "
"from master %s (source %s)",
master, source);
goto next_master;
}
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_USEVC);
goto same_master;
}
}
/*
* if non-auth log and next master;
*/
if ((msg->flags & DNS_MESSAGEFLAG_AA) == 0) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: non-authoritative answer from "
"master %s (source %s)", master, source);
goto next_master;
}
cnamecnt = message_count(msg, DNS_SECTION_ANSWER, dns_rdatatype_cname);
soacnt = message_count(msg, DNS_SECTION_ANSWER, dns_rdatatype_soa);
nscount = message_count(msg, DNS_SECTION_AUTHORITY, dns_rdatatype_ns);
soacount = message_count(msg, DNS_SECTION_AUTHORITY,
dns_rdatatype_soa);
/*
* There should not be a CNAME record at top of zone.
*/
if (cnamecnt != 0) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: CNAME at top of zone "
"in master %s (source %s)", master, source);
goto next_master;
}
/*
* if referral log and next master;
*/
if (soacnt == 0 && soacount == 0 && nscount != 0) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: referral response "
"from master %s (source %s)", master, source);
goto next_master;
}
/*
* if nodata log and next master;
*/
if (soacnt == 0 && (nscount == 0 || soacount != 0)) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: NODATA response "
"from master %s (source %s)", master, source);
goto next_master;
}
/*
* Only one soa at top of zone.
*/
if (soacnt != 1) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: answer SOA count (%d) != 1 "
"from master %s (source %s)",
soacnt, master, source);
goto next_master;
}
/*
* Extract serial
*/
rdataset = NULL;
result = dns_message_findname(msg, DNS_SECTION_ANSWER, &zone->origin,
dns_rdatatype_soa, dns_rdatatype_none,
NULL, &rdataset);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: unable to get SOA record "
"from master %s (source %s)", master, source);
goto next_master;
}
result = dns_rdataset_first(rdataset);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: dns_rdataset_first() failed");
goto next_master;
}
dns_rdataset_current(rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &soa, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
serial = soa.serial;
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED)) {
unsigned int dbsoacount;
result = zone_get_from_db(zone, zone->db, NULL, &dbsoacount,
&oldserial, NULL, NULL, NULL, NULL,
NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
RUNTIME_CHECK(dbsoacount > 0U);
zone_debuglog(zone, me, 1, "serial: new %u, old %u",
serial, oldserial);
} else
zone_debuglog(zone, me, 1, "serial: new %u, old not loaded",
serial);
if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED) ||
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FORCEXFER) ||
isc_serial_gt(serial, oldserial)) {
if (dns_zonemgr_unreachable(zone->zmgr, &zone->masteraddr,
&zone->sourceaddr, &now))
{
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: skipping %s as master %s "
"(source %s) is unreachable (cached)",
(zone->type == dns_zone_slave ||
zone->type == dns_zone_redirect) ?
"zone transfer" : "NS query",
master, source);
goto next_master;
}
tcp_transfer:
isc_event_free(&event);
dns_request_destroy(&zone->request);
if (zone->type == dns_zone_slave ||
zone->type == dns_zone_redirect) {
do_queue_xfrin = true;
} else {
INSIST(zone->type == dns_zone_stub);
ns_query(zone, rdataset, NULL);
}
if (msg != NULL)
dns_message_destroy(&msg);
} else if (isc_serial_eq(soa.serial, oldserial)) {
isc_time_t expiretime;
uint32_t expire;
/*
* Compute the new expire time based on this response.
*/
expire = zone->expire;
get_edns_expire(zone, msg, &expire);
DNS_ZONE_TIME_ADD(&now, expire, &expiretime);
/*
* Has the expire time improved?
*/
if (isc_time_compare(&expiretime, &zone->expiretime) > 0) {
zone->expiretime = expiretime;
if (zone->masterfile != NULL)
setmodtime(zone, &expiretime);
}
DNS_ZONE_JITTER_ADD(&now, zone->refresh, &zone->refreshtime);
zone->mastersok[zone->curmaster] = true;
goto next_master;
} else {
if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_MULTIMASTER))
dns_zone_log(zone, ISC_LOG_INFO, "serial number (%u) "
"received from master %s < ours (%u)",
soa.serial, master, oldserial);
else
zone_debuglog(zone, me, 1, "ahead");
zone->mastersok[zone->curmaster] = true;
goto next_master;
}
if (msg != NULL)
dns_message_destroy(&msg);
goto detach;
next_master:
if (msg != NULL)
dns_message_destroy(&msg);
isc_event_free(&event);
dns_request_destroy(&zone->request);
/*
* Skip to next failed / untried master.
*/
do {
zone->curmaster++;
} while (zone->curmaster < zone->masterscnt &&
zone->mastersok[zone->curmaster]);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NOEDNS);
if (zone->curmaster >= zone->masterscnt) {
bool done = true;
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_USEALTXFRSRC) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEALTXFRSRC)) {
/*
* Did we get a good answer from all the masters?
*/
for (j = 0; j < zone->masterscnt; j++)
if (zone->mastersok[j] == false) {
done = false;
break;
}
} else
done = true;
if (!done) {
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_USEALTXFRSRC);
zone->curmaster = 0;
/*
* Find the next failed master.
*/
while (zone->curmaster < zone->masterscnt &&
zone->mastersok[zone->curmaster])
zone->curmaster++;
goto requeue;
}
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_REFRESH);
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDREFRESH)) {
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDREFRESH);
zone->refreshtime = now;
}
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_USEALTXFRSRC);
zone_settimer(zone, &now);
goto detach;
}
requeue:
queue_soa_query(zone);
goto detach;
same_master:
if (msg != NULL)
dns_message_destroy(&msg);
isc_event_free(&event);
dns_request_destroy(&zone->request);
queue_soa_query(zone);
detach:
UNLOCK_ZONE(zone);
if (do_queue_xfrin)
queue_xfrin(zone);
dns_zone_idetach(&zone);
return;
}
static void
queue_soa_query(dns_zone_t *zone) {
const char me[] = "queue_soa_query";
isc_event_t *e;
dns_zone_t *dummy = NULL;
isc_result_t result;
ENTER;
/*
* Locked by caller
*/
REQUIRE(LOCKED_ZONE(zone));
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING)) {
cancel_refresh(zone);
return;
}
e = isc_event_allocate(zone->mctx, NULL, DNS_EVENT_ZONE,
soa_query, zone, sizeof(isc_event_t));
if (e == NULL) {
cancel_refresh(zone);
return;
}
/*
* Attach so that we won't clean up
* until the event is delivered.
*/
zone_iattach(zone, &dummy);
e->ev_arg = zone;
e->ev_sender = NULL;
result = isc_ratelimiter_enqueue(zone->zmgr->refreshrl, zone->task, &e);
if (result != ISC_R_SUCCESS) {
zone_idetach(&dummy);
isc_event_free(&e);
cancel_refresh(zone);
}
}
static inline isc_result_t
create_query(dns_zone_t *zone, dns_rdatatype_t rdtype,
dns_message_t **messagep)
{
dns_message_t *message = NULL;
dns_name_t *qname = NULL;
dns_rdataset_t *qrdataset = NULL;
isc_result_t result;
result = dns_message_create(zone->mctx, DNS_MESSAGE_INTENTRENDER,
&message);
if (result != ISC_R_SUCCESS)
goto cleanup;
message->opcode = dns_opcode_query;
message->rdclass = zone->rdclass;
result = dns_message_gettempname(message, &qname);
if (result != ISC_R_SUCCESS)
goto cleanup;
result = dns_message_gettemprdataset(message, &qrdataset);
if (result != ISC_R_SUCCESS)
goto cleanup;
/*
* Make question.
*/
dns_name_init(qname, NULL);
dns_name_clone(&zone->origin, qname);
dns_rdataset_makequestion(qrdataset, zone->rdclass, rdtype);
ISC_LIST_APPEND(qname->list, qrdataset, link);
dns_message_addname(message, qname, DNS_SECTION_QUESTION);
*messagep = message;
return (ISC_R_SUCCESS);
cleanup:
if (qname != NULL)
dns_message_puttempname(message, &qname);
if (qrdataset != NULL)
dns_message_puttemprdataset(message, &qrdataset);
if (message != NULL)
dns_message_destroy(&message);
return (result);
}
static isc_result_t
add_opt(dns_message_t *message, uint16_t udpsize, bool reqnsid,
bool reqexpire)
{
isc_result_t result;
dns_rdataset_t *rdataset = NULL;
dns_ednsopt_t ednsopts[DNS_EDNSOPTIONS];
int count = 0;
/* Set EDNS options if applicable */
if (reqnsid) {
INSIST(count < DNS_EDNSOPTIONS);
ednsopts[count].code = DNS_OPT_NSID;
ednsopts[count].length = 0;
ednsopts[count].value = NULL;
count++;
}
if (reqexpire) {
INSIST(count < DNS_EDNSOPTIONS);
ednsopts[count].code = DNS_OPT_EXPIRE;
ednsopts[count].length = 0;
ednsopts[count].value = NULL;
count++;
}
result = dns_message_buildopt(message, &rdataset, 0, udpsize, 0,
ednsopts, count);
if (result != ISC_R_SUCCESS)
return (result);
return (dns_message_setopt(message, rdataset));
}
static void
soa_query(isc_task_t *task, isc_event_t *event) {
const char me[] = "soa_query";
isc_result_t result = ISC_R_FAILURE;
dns_message_t *message = NULL;
dns_zone_t *zone = event->ev_arg;
dns_zone_t *dummy = NULL;
isc_netaddr_t masterip;
dns_tsigkey_t *key = NULL;
uint32_t options;
bool cancel = true;
int timeout;
bool have_xfrsource, have_xfrdscp, reqnsid, reqexpire;
uint16_t udpsize = SEND_BUFFER_SIZE;
isc_dscp_t dscp = -1;
REQUIRE(DNS_ZONE_VALID(zone));
UNUSED(task);
ENTER;
LOCK_ZONE(zone);
if (((event->ev_attributes & ISC_EVENTATTR_CANCELED) != 0) ||
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING) ||
zone->view->requestmgr == NULL) {
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING))
cancel = false;
goto cleanup;
}
again:
result = create_query(zone, dns_rdatatype_soa, &message);
if (result != ISC_R_SUCCESS)
goto cleanup;
INSIST(zone->masterscnt > 0);
INSIST(zone->curmaster < zone->masterscnt);
zone->masteraddr = zone->masters[zone->curmaster];
isc_netaddr_fromsockaddr(&masterip, &zone->masteraddr);
/*
* First, look for a tsig key in the master statement, then
* try for a server key.
*/
if ((zone->masterkeynames != NULL) &&
(zone->masterkeynames[zone->curmaster] != NULL)) {
dns_view_t *view = dns_zone_getview(zone);
dns_name_t *keyname = zone->masterkeynames[zone->curmaster];
result = dns_view_gettsig(view, keyname, &key);
if (result != ISC_R_SUCCESS) {
char namebuf[DNS_NAME_FORMATSIZE];
dns_name_format(keyname, namebuf, sizeof(namebuf));
dns_zone_log(zone, ISC_LOG_ERROR,
"unable to find key: %s", namebuf);
goto skip_master;
}
}
if (key == NULL) {
result = dns_view_getpeertsig(zone->view, &masterip, &key);
if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND) {
char addrbuf[ISC_NETADDR_FORMATSIZE];
isc_netaddr_format(&masterip, addrbuf, sizeof(addrbuf));
dns_zone_log(zone, ISC_LOG_ERROR,
"unable to find TSIG key for %s", addrbuf);
goto skip_master;
}
}
options = DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEVC) ?
DNS_REQUESTOPT_TCP : 0;
have_xfrsource = have_xfrdscp = false;
reqnsid = zone->view->requestnsid;
reqexpire = zone->requestexpire;
if (zone->view->peers != NULL) {
dns_peer_t *peer = NULL;
bool edns, usetcp;
result = dns_peerlist_peerbyaddr(zone->view->peers,
&masterip, &peer);
if (result == ISC_R_SUCCESS) {
result = dns_peer_getsupportedns(peer, &edns);
if (result == ISC_R_SUCCESS && !edns)
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOEDNS);
result = dns_peer_gettransfersource(peer,
&zone->sourceaddr);
if (result == ISC_R_SUCCESS)
have_xfrsource = true;
(void)dns_peer_gettransferdscp(peer, &dscp);
if (dscp != -1)
have_xfrdscp = true;
if (zone->view->resolver != NULL)
udpsize =
dns_resolver_getudpsize(zone->view->resolver);
(void)dns_peer_getudpsize(peer, &udpsize);
(void)dns_peer_getrequestnsid(peer, &reqnsid);
(void)dns_peer_getrequestexpire(peer, &reqexpire);
result = dns_peer_getforcetcp(peer, &usetcp);
if (result == ISC_R_SUCCESS && usetcp)
options |= DNS_REQUESTOPT_TCP;
}
}
switch (isc_sockaddr_pf(&zone->masteraddr)) {
case PF_INET:
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEALTXFRSRC)) {
if (isc_sockaddr_equal(&zone->altxfrsource4,
&zone->xfrsource4))
goto skip_master;
zone->sourceaddr = zone->altxfrsource4;
if (!have_xfrdscp)
dscp = zone->altxfrsource4dscp;
} else if (!have_xfrsource) {
zone->sourceaddr = zone->xfrsource4;
if (!have_xfrdscp)
dscp = zone->xfrsource4dscp;
}
break;
case PF_INET6:
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEALTXFRSRC)) {
if (isc_sockaddr_equal(&zone->altxfrsource6,
&zone->xfrsource6))
goto skip_master;
zone->sourceaddr = zone->altxfrsource6;
if (!have_xfrdscp)
dscp = zone->altxfrsource6dscp;
} else if (!have_xfrsource) {
zone->sourceaddr = zone->xfrsource6;
if (!have_xfrdscp)
dscp = zone->xfrsource6dscp;
}
break;
default:
result = ISC_R_NOTIMPLEMENTED;
goto cleanup;
}
if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOEDNS)) {
result = add_opt(message, udpsize, reqnsid, reqexpire);
if (result != ISC_R_SUCCESS)
zone_debuglog(zone, me, 1,
"unable to add opt record: %s",
dns_result_totext(result));
}
zone_iattach(zone, &dummy);
timeout = 15;
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALREFRESH))
timeout = 30;
result = dns_request_createvia4(zone->view->requestmgr, message,
&zone->sourceaddr, &zone->masteraddr,
dscp, options, key, timeout * 3,
timeout, 0, zone->task,
refresh_callback, zone, &zone->request);
if (result != ISC_R_SUCCESS) {
zone_idetach(&dummy);
zone_debuglog(zone, me, 1,
"dns_request_createvia4() failed: %s",
dns_result_totext(result));
goto skip_master;
} else {
if (isc_sockaddr_pf(&zone->masteraddr) == PF_INET)
inc_stats(zone, dns_zonestatscounter_soaoutv4);
else
inc_stats(zone, dns_zonestatscounter_soaoutv6);
}
cancel = false;
cleanup:
if (key != NULL)
dns_tsigkey_detach(&key);
if (result != ISC_R_SUCCESS)
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_REFRESH);
if (message != NULL)
dns_message_destroy(&message);
if (cancel)
cancel_refresh(zone);
isc_event_free(&event);
UNLOCK_ZONE(zone);
dns_zone_idetach(&zone);
return;
skip_master:
if (key != NULL)
dns_tsigkey_detach(&key);
dns_message_destroy(&message);
/*
* Skip to next failed / untried master.
*/
do {
zone->curmaster++;
} while (zone->curmaster < zone->masterscnt &&
zone->mastersok[zone->curmaster]);
if (zone->curmaster < zone->masterscnt)
goto again;
zone->curmaster = 0;
goto cleanup;
}
static void
ns_query(dns_zone_t *zone, dns_rdataset_t *soardataset, dns_stub_t *stub) {
const char me[] = "ns_query";
isc_result_t result;
dns_message_t *message = NULL;
isc_netaddr_t masterip;
dns_tsigkey_t *key = NULL;
dns_dbnode_t *node = NULL;
int timeout;
bool have_xfrsource = false, have_xfrdscp = false;
bool reqnsid;
uint16_t udpsize = SEND_BUFFER_SIZE;
isc_dscp_t dscp = -1;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(LOCKED_ZONE(zone));
REQUIRE((soardataset != NULL && stub == NULL) ||
(soardataset == NULL && stub != NULL));
REQUIRE(stub == NULL || DNS_STUB_VALID(stub));
ENTER;
if (stub == NULL) {
stub = isc_mem_get(zone->mctx, sizeof(*stub));
if (stub == NULL)
goto cleanup;
stub->magic = STUB_MAGIC;
stub->mctx = zone->mctx;
stub->zone = NULL;
stub->db = NULL;
stub->version = NULL;
/*
* Attach so that the zone won't disappear from under us.
*/
zone_iattach(zone, &stub->zone);
/*
* If a db exists we will update it, otherwise we create a
* new one and attach it to the zone once we have the NS
* RRset and glue.
*/
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL) {
dns_db_attach(zone->db, &stub->db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
} else {
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
INSIST(zone->db_argc >= 1);
result = dns_db_create(zone->mctx, zone->db_argv[0],
&zone->origin, dns_dbtype_stub,
zone->rdclass,
zone->db_argc - 1,
zone->db_argv + 1,
&stub->db);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"refreshing stub: "
"could not create "
"database: %s",
dns_result_totext(result));
goto cleanup;
}
dns_db_settask(stub->db, zone->task);
}
result = dns_db_newversion(stub->db, &stub->version);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_INFO, "refreshing stub: "
"dns_db_newversion() failed: %s",
dns_result_totext(result));
goto cleanup;
}
/*
* Update SOA record.
*/
result = dns_db_findnode(stub->db, &zone->origin, true,
&node);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_INFO, "refreshing stub: "
"dns_db_findnode() failed: %s",
dns_result_totext(result));
goto cleanup;
}
result = dns_db_addrdataset(stub->db, node, stub->version, 0,
soardataset, 0, NULL);
dns_db_detachnode(stub->db, &node);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_INFO,
"refreshing stub: "
"dns_db_addrdataset() failed: %s",
dns_result_totext(result));
goto cleanup;
}
}
/*
* XXX Optimisation: Create message when zone is setup and reuse.
*/
result = create_query(zone, dns_rdatatype_ns, &message);
INSIST(result == ISC_R_SUCCESS);
INSIST(zone->masterscnt > 0);
INSIST(zone->curmaster < zone->masterscnt);
zone->masteraddr = zone->masters[zone->curmaster];
isc_netaddr_fromsockaddr(&masterip, &zone->masteraddr);
/*
* First, look for a tsig key in the master statement, then
* try for a server key.
*/
if ((zone->masterkeynames != NULL) &&
(zone->masterkeynames[zone->curmaster] != NULL)) {
dns_view_t *view = dns_zone_getview(zone);
dns_name_t *keyname = zone->masterkeynames[zone->curmaster];
result = dns_view_gettsig(view, keyname, &key);
if (result != ISC_R_SUCCESS) {
char namebuf[DNS_NAME_FORMATSIZE];
dns_name_format(keyname, namebuf, sizeof(namebuf));
dns_zone_log(zone, ISC_LOG_ERROR,
"unable to find key: %s", namebuf);
}
}
if (key == NULL)
(void)dns_view_getpeertsig(zone->view, &masterip, &key);
reqnsid = zone->view->requestnsid;
if (zone->view->peers != NULL) {
dns_peer_t *peer = NULL;
bool edns;
result = dns_peerlist_peerbyaddr(zone->view->peers,
&masterip, &peer);
if (result == ISC_R_SUCCESS) {
result = dns_peer_getsupportedns(peer, &edns);
if (result == ISC_R_SUCCESS && !edns)
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOEDNS);
result = dns_peer_gettransfersource(peer,
&zone->sourceaddr);
if (result == ISC_R_SUCCESS)
have_xfrsource = true;
result = dns_peer_gettransferdscp(peer, &dscp);
if (result == ISC_R_SUCCESS && dscp != -1)
have_xfrdscp = true;
if (zone->view->resolver != NULL)
udpsize =
dns_resolver_getudpsize(zone->view->resolver);
(void)dns_peer_getudpsize(peer, &udpsize);
(void)dns_peer_getrequestnsid(peer, &reqnsid);
}
}
if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOEDNS)) {
result = add_opt(message, udpsize, reqnsid, false);
if (result != ISC_R_SUCCESS)
zone_debuglog(zone, me, 1,
"unable to add opt record: %s",
dns_result_totext(result));
}
/*
* Always use TCP so that we shouldn't truncate in additional section.
*/
switch (isc_sockaddr_pf(&zone->masteraddr)) {
case PF_INET:
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEALTXFRSRC)) {
zone->sourceaddr = zone->altxfrsource4;
if (!have_xfrdscp)
dscp = zone->altxfrsource4dscp;
} else if (!have_xfrsource) {
zone->sourceaddr = zone->xfrsource4;
if (!have_xfrdscp)
dscp = zone->xfrsource4dscp;
}
break;
case PF_INET6:
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEALTXFRSRC)) {
zone->sourceaddr = zone->altxfrsource6;
if (!have_xfrdscp)
dscp = zone->altxfrsource6dscp;
} else if (!have_xfrsource) {
zone->sourceaddr = zone->xfrsource6;
if (!have_xfrdscp)
dscp = zone->xfrsource6dscp;
}
break;
default:
result = ISC_R_NOTIMPLEMENTED;
POST(result);
goto cleanup;
}
timeout = 15;
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALREFRESH))
timeout = 30;
result = dns_request_createvia4(zone->view->requestmgr, message,
&zone->sourceaddr, &zone->masteraddr,
dscp, DNS_REQUESTOPT_TCP, key,
timeout * 3, timeout, 0, zone->task,
stub_callback, stub, &zone->request);
if (result != ISC_R_SUCCESS) {
zone_debuglog(zone, me, 1,
"dns_request_createvia() failed: %s",
dns_result_totext(result));
goto cleanup;
}
dns_message_destroy(&message);
goto unlock;
cleanup:
cancel_refresh(zone);
if (stub != NULL) {
stub->magic = 0;
if (stub->version != NULL)
dns_db_closeversion(stub->db, &stub->version,
false);
if (stub->db != NULL)
dns_db_detach(&stub->db);
if (stub->zone != NULL)
zone_idetach(&stub->zone);
isc_mem_put(stub->mctx, stub, sizeof(*stub));
}
if (message != NULL)
dns_message_destroy(&message);
unlock:
if (key != NULL)
dns_tsigkey_detach(&key);
return;
}
/*
* Handle the control event. Note that although this event causes the zone
* to shut down, it is not a shutdown event in the sense of the task library.
*/
static void
zone_shutdown(isc_task_t *task, isc_event_t *event) {
dns_zone_t *zone = (dns_zone_t *) event->ev_arg;
bool free_needed, linked = false;
dns_zone_t *raw = NULL, *secure = NULL;
UNUSED(task);
REQUIRE(DNS_ZONE_VALID(zone));
INSIST(event->ev_type == DNS_EVENT_ZONECONTROL);
INSIST(isc_refcount_current(&zone->erefs) == 0);
zone_debuglog(zone, "zone_shutdown", 3, "shutting down");
/*
* Stop things being restarted after we cancel them below.
*/
LOCK_ZONE(zone);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_EXITING);
UNLOCK_ZONE(zone);
/*
* If we were waiting for xfrin quota, step out of
* the queue.
* If there's no zone manager, we can't be waiting for the
* xfrin quota
*/
if (zone->zmgr != NULL) {
RWLOCK(&zone->zmgr->rwlock, isc_rwlocktype_write);
if (zone->statelist == &zone->zmgr->waiting_for_xfrin) {
ISC_LIST_UNLINK(zone->zmgr->waiting_for_xfrin, zone,
statelink);
linked = true;
zone->statelist = NULL;
}
if (zone->statelist == &zone->zmgr->xfrin_in_progress) {
ISC_LIST_UNLINK(zone->zmgr->xfrin_in_progress, zone,
statelink);
zone->statelist = NULL;
zmgr_resume_xfrs(zone->zmgr, false);
}
RWUNLOCK(&zone->zmgr->rwlock, isc_rwlocktype_write);
}
/*
* In task context, no locking required. See zone_xfrdone().
*/
if (zone->xfr != NULL)
dns_xfrin_shutdown(zone->xfr);
/* Safe to release the zone now */
if (zone->zmgr != NULL)
dns_zonemgr_releasezone(zone->zmgr, zone);
LOCK_ZONE(zone);
INSIST(zone != zone->raw);
if (linked) {
INSIST(zone->irefs > 0);
zone->irefs--;
}
if (zone->request != NULL) {
dns_request_cancel(zone->request);
}
if (zone->readio != NULL)
zonemgr_cancelio(zone->readio);
if (zone->lctx != NULL)
dns_loadctx_cancel(zone->lctx);
if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FLUSH) ||
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DUMPING)) {
if (zone->writeio != NULL)
zonemgr_cancelio(zone->writeio);
if (zone->dctx != NULL)
dns_dumpctx_cancel(zone->dctx);
}
notify_cancel(zone);
forward_cancel(zone);
if (zone->timer != NULL) {
isc_timer_detach(&zone->timer);
INSIST(zone->irefs > 0);
zone->irefs--;
}
/*
* We have now canceled everything set the flag to allow exit_check()
* to succeed. We must not unlock between setting this flag and
* calling exit_check().
*/
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_SHUTDOWN);
free_needed = exit_check(zone);
if (inline_secure(zone)) {
raw = zone->raw;
zone->raw = NULL;
}
if (inline_raw(zone)) {
secure = zone->secure;
zone->secure = NULL;
}
UNLOCK_ZONE(zone);
if (raw != NULL)
dns_zone_detach(&raw);
if (secure != NULL)
dns_zone_idetach(&secure);
if (free_needed)
zone_free(zone);
}
static void
zone_timer(isc_task_t *task, isc_event_t *event) {
const char me[] = "zone_timer";
dns_zone_t *zone = (dns_zone_t *)event->ev_arg;
UNUSED(task);
REQUIRE(DNS_ZONE_VALID(zone));
ENTER;
zone_maintenance(zone);
isc_event_free(&event);
}
static void
zone_settimer(dns_zone_t *zone, isc_time_t *now) {
const char me[] = "zone_settimer";
isc_time_t next;
isc_result_t result;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(LOCKED_ZONE(zone));
ENTER;
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING))
return;
isc_time_settoepoch(&next);
switch (zone->type) {
case dns_zone_redirect:
if (zone->masters != NULL)
goto treat_as_slave;
/* FALLTHROUGH */
case dns_zone_master:
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDNOTIFY) ||
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDSTARTUPNOTIFY))
next = zone->notifytime;
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DUMPING)) {
INSIST(!isc_time_isepoch(&zone->dumptime));
if (isc_time_isepoch(&next) ||
isc_time_compare(&zone->dumptime, &next) < 0)
next = zone->dumptime;
}
if (zone->type == dns_zone_redirect)
break;
if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_REFRESHING) &&
!isc_time_isepoch(&zone->refreshkeytime)) {
if (isc_time_isepoch(&next) ||
isc_time_compare(&zone->refreshkeytime, &next) < 0)
next = zone->refreshkeytime;
}
if (!isc_time_isepoch(&zone->resigntime)) {
if (isc_time_isepoch(&next) ||
isc_time_compare(&zone->resigntime, &next) < 0)
next = zone->resigntime;
}
if (!isc_time_isepoch(&zone->keywarntime)) {
if (isc_time_isepoch(&next) ||
isc_time_compare(&zone->keywarntime, &next) < 0)
next = zone->keywarntime;
}
if (!isc_time_isepoch(&zone->signingtime)) {
if (isc_time_isepoch(&next) ||
isc_time_compare(&zone->signingtime, &next) < 0)
next = zone->signingtime;
}
if (!isc_time_isepoch(&zone->nsec3chaintime)) {
if (isc_time_isepoch(&next) ||
isc_time_compare(&zone->nsec3chaintime, &next) < 0)
next = zone->nsec3chaintime;
}
break;
case dns_zone_slave:
treat_as_slave:
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDNOTIFY) ||
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDSTARTUPNOTIFY))
next = zone->notifytime;
/* FALLTHROUGH */
case dns_zone_stub:
if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_REFRESH) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOMASTERS) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOREFRESH) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADING) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADPENDING) &&
!isc_time_isepoch(&zone->refreshtime) &&
(isc_time_isepoch(&next) ||
isc_time_compare(&zone->refreshtime, &next) < 0))
next = zone->refreshtime;
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED) &&
!isc_time_isepoch(&zone->expiretime)) {
if (isc_time_isepoch(&next) ||
isc_time_compare(&zone->expiretime, &next) < 0)
next = zone->expiretime;
}
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DUMPING)) {
INSIST(!isc_time_isepoch(&zone->dumptime));
if (isc_time_isepoch(&next) ||
isc_time_compare(&zone->dumptime, &next) < 0)
next = zone->dumptime;
}
break;
case dns_zone_key:
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DUMPING)) {
INSIST(!isc_time_isepoch(&zone->dumptime));
if (isc_time_isepoch(&next) ||
isc_time_compare(&zone->dumptime, &next) < 0)
next = zone->dumptime;
}
if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_REFRESHING)) {
if (isc_time_isepoch(&next) ||
(!isc_time_isepoch(&zone->refreshkeytime) &&
isc_time_compare(&zone->refreshkeytime, &next) < 0))
next = zone->refreshkeytime;
}
break;
default:
break;
}
if (isc_time_isepoch(&next)) {
zone_debuglog(zone, me, 10, "settimer inactive");
result = isc_timer_reset(zone->timer, isc_timertype_inactive,
NULL, NULL, true);
if (result != ISC_R_SUCCESS)
dns_zone_log(zone, ISC_LOG_ERROR,
"could not deactivate zone timer: %s",
isc_result_totext(result));
} else {
if (isc_time_compare(&next, now) <= 0)
next = *now;
result = isc_timer_reset(zone->timer, isc_timertype_once,
&next, NULL, true);
if (result != ISC_R_SUCCESS)
dns_zone_log(zone, ISC_LOG_ERROR,
"could not reset zone timer: %s",
isc_result_totext(result));
}
}
static void
cancel_refresh(dns_zone_t *zone) {
const char me[] = "cancel_refresh";
isc_time_t now;
/*
* 'zone' locked by caller.
*/
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(LOCKED_ZONE(zone));
ENTER;
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_REFRESH);
TIME_NOW(&now);
zone_settimer(zone, &now);
}
static isc_result_t
notify_createmessage(dns_zone_t *zone, unsigned int flags,
dns_message_t **messagep)
{
dns_db_t *zonedb = NULL;
dns_dbnode_t *node = NULL;
dns_dbversion_t *version = NULL;
dns_message_t *message = NULL;
dns_rdataset_t rdataset;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_name_t *tempname = NULL;
dns_rdata_t *temprdata = NULL;
dns_rdatalist_t *temprdatalist = NULL;
dns_rdataset_t *temprdataset = NULL;
isc_result_t result;
isc_region_t r;
isc_buffer_t *b = NULL;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(messagep != NULL && *messagep == NULL);
result = dns_message_create(zone->mctx, DNS_MESSAGE_INTENTRENDER,
&message);
if (result != ISC_R_SUCCESS)
return (result);
message->opcode = dns_opcode_notify;
message->flags |= DNS_MESSAGEFLAG_AA;
message->rdclass = zone->rdclass;
result = dns_message_gettempname(message, &tempname);
if (result != ISC_R_SUCCESS)
goto cleanup;
result = dns_message_gettemprdataset(message, &temprdataset);
if (result != ISC_R_SUCCESS)
goto cleanup;
/*
* Make question.
*/
dns_name_init(tempname, NULL);
dns_name_clone(&zone->origin, tempname);
dns_rdataset_makequestion(temprdataset, zone->rdclass,
dns_rdatatype_soa);
ISC_LIST_APPEND(tempname->list, temprdataset, link);
dns_message_addname(message, tempname, DNS_SECTION_QUESTION);
tempname = NULL;
temprdataset = NULL;
if ((flags & DNS_NOTIFY_NOSOA) != 0)
goto done;
result = dns_message_gettempname(message, &tempname);
if (result != ISC_R_SUCCESS)
goto soa_cleanup;
result = dns_message_gettemprdata(message, &temprdata);
if (result != ISC_R_SUCCESS)
goto soa_cleanup;
result = dns_message_gettemprdataset(message, &temprdataset);
if (result != ISC_R_SUCCESS)
goto soa_cleanup;
result = dns_message_gettemprdatalist(message, &temprdatalist);
if (result != ISC_R_SUCCESS)
goto soa_cleanup;
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
INSIST(zone->db != NULL); /* XXXJT: is this assumption correct? */
dns_db_attach(zone->db, &zonedb);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
dns_name_init(tempname, NULL);
dns_name_clone(&zone->origin, tempname);
dns_db_currentversion(zonedb, &version);
result = dns_db_findnode(zonedb, tempname, false, &node);
if (result != ISC_R_SUCCESS)
goto soa_cleanup;
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(zonedb, node, version,
dns_rdatatype_soa,
dns_rdatatype_none, 0, &rdataset,
NULL);
if (result != ISC_R_SUCCESS)
goto soa_cleanup;
result = dns_rdataset_first(&rdataset);
if (result != ISC_R_SUCCESS)
goto soa_cleanup;
dns_rdataset_current(&rdataset, &rdata);
dns_rdata_toregion(&rdata, &r);
result = isc_buffer_allocate(zone->mctx, &b, r.length);
if (result != ISC_R_SUCCESS)
goto soa_cleanup;
isc_buffer_putmem(b, r.base, r.length);
isc_buffer_usedregion(b, &r);
dns_rdata_init(temprdata);
dns_rdata_fromregion(temprdata, rdata.rdclass, rdata.type, &r);
dns_message_takebuffer(message, &b);
result = dns_rdataset_next(&rdataset);
dns_rdataset_disassociate(&rdataset);
if (result != ISC_R_NOMORE)
goto soa_cleanup;
temprdatalist->rdclass = rdata.rdclass;
temprdatalist->type = rdata.type;
temprdatalist->ttl = rdataset.ttl;
ISC_LIST_APPEND(temprdatalist->rdata, temprdata, link);
result = dns_rdatalist_tordataset(temprdatalist, temprdataset);
if (result != ISC_R_SUCCESS)
goto soa_cleanup;
ISC_LIST_APPEND(tempname->list, temprdataset, link);
dns_message_addname(message, tempname, DNS_SECTION_ANSWER);
temprdatalist = NULL;
temprdataset = NULL;
temprdata = NULL;
tempname = NULL;
soa_cleanup:
if (node != NULL)
dns_db_detachnode(zonedb, &node);
if (version != NULL)
dns_db_closeversion(zonedb, &version, false);
if (zonedb != NULL)
dns_db_detach(&zonedb);
if (tempname != NULL)
dns_message_puttempname(message, &tempname);
if (temprdata != NULL)
dns_message_puttemprdata(message, &temprdata);
if (temprdataset != NULL)
dns_message_puttemprdataset(message, &temprdataset);
if (temprdatalist != NULL)
dns_message_puttemprdatalist(message, &temprdatalist);
done:
*messagep = message;
return (ISC_R_SUCCESS);
cleanup:
if (tempname != NULL)
dns_message_puttempname(message, &tempname);
if (temprdataset != NULL)
dns_message_puttemprdataset(message, &temprdataset);
dns_message_destroy(&message);
return (result);
}
isc_result_t
dns_zone_notifyreceive(dns_zone_t *zone, isc_sockaddr_t *from,
dns_message_t *msg)
{
return (dns_zone_notifyreceive2(zone, from, NULL, msg));
}
isc_result_t
dns_zone_notifyreceive2(dns_zone_t *zone, isc_sockaddr_t *from,
isc_sockaddr_t *to, dns_message_t *msg)
{
unsigned int i;
dns_rdata_soa_t soa;
dns_rdataset_t *rdataset = NULL;
dns_rdata_t rdata = DNS_RDATA_INIT;
isc_result_t result;
char fromtext[ISC_SOCKADDR_FORMATSIZE];
int match = 0;
isc_netaddr_t netaddr;
uint32_t serial = 0;
bool have_serial = false;
dns_tsigkey_t *tsigkey;
const dns_name_t *tsig;
REQUIRE(DNS_ZONE_VALID(zone));
/*
* If type != T_SOA return DNS_R_NOTIMP. We don't yet support
* ROLLOVER.
*
* SOA: RFC1996
* Check that 'from' is a valid notify source, (zone->masters).
* Return DNS_R_REFUSED if not.
*
* If the notify message contains a serial number check it
* against the zones serial and return if <= current serial
*
* If a refresh check is progress, if so just record the
* fact we received a NOTIFY and from where and return.
* We will perform a new refresh check when the current one
* completes. Return ISC_R_SUCCESS.
*
* Otherwise initiate a refresh check using 'from' as the
* first address to check. Return ISC_R_SUCCESS.
*/
isc_sockaddr_format(from, fromtext, sizeof(fromtext));
/*
* Notify messages are processed by the raw zone.
*/
LOCK_ZONE(zone);
INSIST(zone != zone->raw);
if (inline_secure(zone)) {
result = dns_zone_notifyreceive2(zone->raw, from, to, msg);
UNLOCK_ZONE(zone);
return (result);
}
/*
* We only handle NOTIFY (SOA) at the present.
*/
if (isc_sockaddr_pf(from) == PF_INET)
inc_stats(zone, dns_zonestatscounter_notifyinv4);
else
inc_stats(zone, dns_zonestatscounter_notifyinv6);
if (msg->counts[DNS_SECTION_QUESTION] == 0 ||
dns_message_findname(msg, DNS_SECTION_QUESTION, &zone->origin,
dns_rdatatype_soa, dns_rdatatype_none,
NULL, NULL) != ISC_R_SUCCESS) {
UNLOCK_ZONE(zone);
if (msg->counts[DNS_SECTION_QUESTION] == 0) {
dns_zone_log(zone, ISC_LOG_NOTICE,
"NOTIFY with no "
"question section from: %s", fromtext);
return (DNS_R_FORMERR);
}
dns_zone_log(zone, ISC_LOG_NOTICE,
"NOTIFY zone does not match");
return (DNS_R_NOTIMP);
}
/*
* If we are a master zone just succeed.
*/
if (zone->type == dns_zone_master) {
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_netaddr_fromsockaddr(&netaddr, from);
for (i = 0; i < zone->masterscnt; i++) {
if (isc_sockaddr_eqaddr(from, &zone->masters[i]))
break;
if (zone->view->aclenv.match_mapped &&
IN6_IS_ADDR_V4MAPPED(&from->type.sin6.sin6_addr) &&
isc_sockaddr_pf(&zone->masters[i]) == AF_INET) {
isc_netaddr_t na1, na2;
isc_netaddr_fromv4mapped(&na1, &netaddr);
isc_netaddr_fromsockaddr(&na2, &zone->masters[i]);
if (isc_netaddr_equal(&na1, &na2))
break;
}
}
/*
* Accept notify requests from non masters if they are on
* 'zone->notify_acl'.
*/
tsigkey = dns_message_gettsigkey(msg);
tsig = dns_tsigkey_identity(tsigkey);
if (i >= zone->masterscnt && zone->notify_acl != NULL &&
dns_acl_match(&netaddr, tsig, zone->notify_acl,
&zone->view->aclenv,
&match, NULL) == ISC_R_SUCCESS &&
match > 0)
{
/* Accept notify. */
} else if (i >= zone->masterscnt) {
UNLOCK_ZONE(zone);
dns_zone_log(zone, ISC_LOG_INFO,
"refused notify from non-master: %s", fromtext);
inc_stats(zone, dns_zonestatscounter_notifyrej);
return (DNS_R_REFUSED);
}
/*
* If the zone is loaded and there are answers check the serial
* to see if we need to do a refresh. Do not worry about this
* check if we are a dialup zone as we use the notify request
* to trigger a refresh check.
*/
if (msg->counts[DNS_SECTION_ANSWER] > 0 &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOREFRESH)) {
result = dns_message_findname(msg, DNS_SECTION_ANSWER,
&zone->origin,
dns_rdatatype_soa,
dns_rdatatype_none, NULL,
&rdataset);
if (result == ISC_R_SUCCESS)
result = dns_rdataset_first(rdataset);
if (result == ISC_R_SUCCESS) {
uint32_t oldserial;
unsigned int soacount;
dns_rdataset_current(rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &soa, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
serial = soa.serial;
have_serial = true;
/*
* The following should safely be performed without DB
* lock and succeed in this context.
*/
result = zone_get_from_db(zone, zone->db, NULL,
&soacount, &oldserial, NULL,
NULL, NULL, NULL, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
RUNTIME_CHECK(soacount > 0U);
if (isc_serial_le(serial, oldserial)) {
dns_zone_log(zone,
ISC_LOG_INFO,
"notify from %s: "
"zone is up to date",
fromtext);
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
}
}
/*
* If we got this far and there was a refresh in progress just
* let it complete. Record where we got the notify from so we
* can perform a refresh check when the current one completes
*/
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_REFRESH)) {
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDREFRESH);
zone->notifyfrom = *from;
UNLOCK_ZONE(zone);
if (have_serial)
dns_zone_log(zone, ISC_LOG_INFO,
"notify from %s: serial %u: refresh in "
"progress, refresh check queued",
fromtext, serial);
else
dns_zone_log(zone, ISC_LOG_INFO,
"notify from %s: refresh in progress, "
"refresh check queued", fromtext);
return (ISC_R_SUCCESS);
}
if (have_serial)
dns_zone_log(zone, ISC_LOG_INFO, "notify from %s: serial %u",
fromtext, serial);
else
dns_zone_log(zone, ISC_LOG_INFO, "notify from %s: no serial",
fromtext);
zone->notifyfrom = *from;
UNLOCK_ZONE(zone);
if (to != NULL) {
dns_zonemgr_unreachabledel(zone->zmgr, from, to);
}
dns_zone_refresh(zone);
return (ISC_R_SUCCESS);
}
void
dns_zone_setnotifyacl(dns_zone_t *zone, dns_acl_t *acl) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->notify_acl != NULL)
dns_acl_detach(&zone->notify_acl);
dns_acl_attach(acl, &zone->notify_acl);
UNLOCK_ZONE(zone);
}
void
dns_zone_setqueryacl(dns_zone_t *zone, dns_acl_t *acl) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->query_acl != NULL)
dns_acl_detach(&zone->query_acl);
dns_acl_attach(acl, &zone->query_acl);
UNLOCK_ZONE(zone);
}
void
dns_zone_setqueryonacl(dns_zone_t *zone, dns_acl_t *acl) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->queryon_acl != NULL)
dns_acl_detach(&zone->queryon_acl);
dns_acl_attach(acl, &zone->queryon_acl);
UNLOCK_ZONE(zone);
}
void
dns_zone_setupdateacl(dns_zone_t *zone, dns_acl_t *acl) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->update_acl != NULL)
dns_acl_detach(&zone->update_acl);
dns_acl_attach(acl, &zone->update_acl);
UNLOCK_ZONE(zone);
}
void
dns_zone_setforwardacl(dns_zone_t *zone, dns_acl_t *acl) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->forward_acl != NULL)
dns_acl_detach(&zone->forward_acl);
dns_acl_attach(acl, &zone->forward_acl);
UNLOCK_ZONE(zone);
}
void
dns_zone_setxfracl(dns_zone_t *zone, dns_acl_t *acl) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->xfr_acl != NULL)
dns_acl_detach(&zone->xfr_acl);
dns_acl_attach(acl, &zone->xfr_acl);
UNLOCK_ZONE(zone);
}
dns_acl_t *
dns_zone_getnotifyacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->notify_acl);
}
dns_acl_t *
dns_zone_getqueryacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->query_acl);
}
dns_acl_t *
dns_zone_getqueryonacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->queryon_acl);
}
dns_acl_t *
dns_zone_getupdateacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->update_acl);
}
dns_acl_t *
dns_zone_getforwardacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->forward_acl);
}
dns_acl_t *
dns_zone_getxfracl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->xfr_acl);
}
void
dns_zone_clearupdateacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->update_acl != NULL)
dns_acl_detach(&zone->update_acl);
UNLOCK_ZONE(zone);
}
void
dns_zone_clearforwardacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->forward_acl != NULL)
dns_acl_detach(&zone->forward_acl);
UNLOCK_ZONE(zone);
}
void
dns_zone_clearnotifyacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->notify_acl != NULL)
dns_acl_detach(&zone->notify_acl);
UNLOCK_ZONE(zone);
}
void
dns_zone_clearqueryacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->query_acl != NULL)
dns_acl_detach(&zone->query_acl);
UNLOCK_ZONE(zone);
}
void
dns_zone_clearqueryonacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->queryon_acl != NULL)
dns_acl_detach(&zone->queryon_acl);
UNLOCK_ZONE(zone);
}
void
dns_zone_clearxfracl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->xfr_acl != NULL)
dns_acl_detach(&zone->xfr_acl);
UNLOCK_ZONE(zone);
}
bool
dns_zone_getupdatedisabled(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->update_disabled);
}
void
dns_zone_setupdatedisabled(dns_zone_t *zone, bool state) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->update_disabled = state;
}
bool
dns_zone_getzeronosoattl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->zero_no_soa_ttl);
}
void
dns_zone_setzeronosoattl(dns_zone_t *zone, bool state) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->zero_no_soa_ttl = state;
}
void
dns_zone_setchecknames(dns_zone_t *zone, dns_severity_t severity) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->check_names = severity;
}
dns_severity_t
dns_zone_getchecknames(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->check_names);
}
void
dns_zone_setjournalsize(dns_zone_t *zone, int32_t size) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->journalsize = size;
}
int32_t
dns_zone_getjournalsize(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->journalsize);
}
static void
zone_namerd_tostr(dns_zone_t *zone, char *buf, size_t length) {
isc_result_t result = ISC_R_FAILURE;
isc_buffer_t buffer;
REQUIRE(buf != NULL);
REQUIRE(length > 1U);
/*
* Leave space for terminating '\0'.
*/
isc_buffer_init(&buffer, buf, (unsigned int)length - 1);
if (zone->type != dns_zone_redirect && zone->type != dns_zone_key) {
if (dns_name_dynamic(&zone->origin))
result = dns_name_totext(&zone->origin, true, &buffer);
if (result != ISC_R_SUCCESS &&
isc_buffer_availablelength(&buffer) >= (sizeof("<UNKNOWN>") - 1))
isc_buffer_putstr(&buffer, "<UNKNOWN>");
if (isc_buffer_availablelength(&buffer) > 0)
isc_buffer_putstr(&buffer, "/");
(void)dns_rdataclass_totext(zone->rdclass, &buffer);
}
if (zone->view != NULL && strcmp(zone->view->name, "_bind") != 0 &&
strcmp(zone->view->name, "_default") != 0 &&
strlen(zone->view->name) < isc_buffer_availablelength(&buffer)) {
isc_buffer_putstr(&buffer, "/");
isc_buffer_putstr(&buffer, zone->view->name);
}
if (inline_secure(zone) && 9U < isc_buffer_availablelength(&buffer))
isc_buffer_putstr(&buffer, " (signed)");
if (inline_raw(zone) && 11U < isc_buffer_availablelength(&buffer))
isc_buffer_putstr(&buffer, " (unsigned)");
buf[isc_buffer_usedlength(&buffer)] = '\0';
}
static void
zone_name_tostr(dns_zone_t *zone, char *buf, size_t length) {
isc_result_t result = ISC_R_FAILURE;
isc_buffer_t buffer;
REQUIRE(buf != NULL);
REQUIRE(length > 1U);
/*
* Leave space for terminating '\0'.
*/
isc_buffer_init(&buffer, buf, (unsigned int)length - 1);
if (dns_name_dynamic(&zone->origin))
result = dns_name_totext(&zone->origin, true, &buffer);
if (result != ISC_R_SUCCESS &&
isc_buffer_availablelength(&buffer) >= (sizeof("<UNKNOWN>") - 1))
isc_buffer_putstr(&buffer, "<UNKNOWN>");
buf[isc_buffer_usedlength(&buffer)] = '\0';
}
static void
zone_rdclass_tostr(dns_zone_t *zone, char *buf, size_t length) {
isc_buffer_t buffer;
REQUIRE(buf != NULL);
REQUIRE(length > 1U);
/*
* Leave space for terminating '\0'.
*/
isc_buffer_init(&buffer, buf, (unsigned int)length - 1);
(void)dns_rdataclass_totext(zone->rdclass, &buffer);
buf[isc_buffer_usedlength(&buffer)] = '\0';
}
static void
zone_viewname_tostr(dns_zone_t *zone, char *buf, size_t length) {
isc_buffer_t buffer;
REQUIRE(buf != NULL);
REQUIRE(length > 1U);
/*
* Leave space for terminating '\0'.
*/
isc_buffer_init(&buffer, buf, (unsigned int)length - 1);
if (zone->view == NULL) {
isc_buffer_putstr(&buffer, "_none");
} else if (strlen(zone->view->name)
< isc_buffer_availablelength(&buffer)) {
isc_buffer_putstr(&buffer, zone->view->name);
} else {
isc_buffer_putstr(&buffer, "_toolong");
}
buf[isc_buffer_usedlength(&buffer)] = '\0';
}
void
dns_zone_name(dns_zone_t *zone, char *buf, size_t length) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(buf != NULL);
zone_namerd_tostr(zone, buf, length);
}
void
dns_zone_nameonly(dns_zone_t *zone, char *buf, size_t length) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(buf != NULL);
zone_name_tostr(zone, buf, length);
}
void
dns_zone_logv(dns_zone_t *zone, isc_logcategory_t *category, int level,
const char *prefix, const char *fmt, va_list ap)
{
char message[4096];
const char *zstr;
if (!isc_log_wouldlog(dns_lctx, level)) {
return;
}
vsnprintf(message, sizeof(message), fmt, ap);
switch (zone->type) {
case dns_zone_key:
zstr = "managed-keys-zone";
break;
case dns_zone_redirect:
zstr = "redirect-zone";
break;
default:
zstr = "zone ";
}
isc_log_write(dns_lctx, category, DNS_LOGMODULE_ZONE, level,
"%s%s%s%s: %s",
(prefix != NULL ? prefix : ""),
(prefix != NULL ? ": " : ""),
zstr, zone->strnamerd, message);
}
static void
notify_log(dns_zone_t *zone, int level, const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
dns_zone_logv(zone, DNS_LOGCATEGORY_NOTIFY, level, NULL, fmt, ap);
va_end(ap);
}
void
dns_zone_logc(dns_zone_t *zone, isc_logcategory_t *category,
int level, const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
dns_zone_logv(zone, category, level, NULL, fmt, ap);
va_end(ap);
}
void
dns_zone_log(dns_zone_t *zone, int level, const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
dns_zone_logv(zone, DNS_LOGCATEGORY_GENERAL, level, NULL, fmt, ap);
va_end(ap);
}
static void
zone_debuglog(dns_zone_t *zone, const char *me, int debuglevel,
const char *fmt, ...)
{
int level = ISC_LOG_DEBUG(debuglevel);
va_list ap;
va_start(ap, fmt);
dns_zone_logv(zone, DNS_LOGCATEGORY_GENERAL, level, me, fmt, ap);
va_end(ap);
}
static int
message_count(dns_message_t *msg, dns_section_t section, dns_rdatatype_t type)
{
isc_result_t result;
dns_name_t *name;
dns_rdataset_t *curr;
int count = 0;
result = dns_message_firstname(msg, section);
while (result == ISC_R_SUCCESS) {
name = NULL;
dns_message_currentname(msg, section, &name);
for (curr = ISC_LIST_TAIL(name->list); curr != NULL;
curr = ISC_LIST_PREV(curr, link)) {
if (curr->type == type)
count++;
}
result = dns_message_nextname(msg, section);
}
return (count);
}
void
dns_zone_setmaxxfrin(dns_zone_t *zone, uint32_t maxxfrin) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->maxxfrin = maxxfrin;
}
uint32_t
dns_zone_getmaxxfrin(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->maxxfrin);
}
void
dns_zone_setmaxxfrout(dns_zone_t *zone, uint32_t maxxfrout) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->maxxfrout = maxxfrout;
}
uint32_t
dns_zone_getmaxxfrout(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->maxxfrout);
}
dns_zonetype_t
dns_zone_gettype(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->type);
}
dns_name_t *
dns_zone_getorigin(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (&zone->origin);
}
void
dns_zone_settask(dns_zone_t *zone, isc_task_t *task) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->task != NULL)
isc_task_detach(&zone->task);
isc_task_attach(task, &zone->task);
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL)
dns_db_settask(zone->db, zone->task);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
UNLOCK_ZONE(zone);
}
void
dns_zone_gettask(dns_zone_t *zone, isc_task_t **target) {
REQUIRE(DNS_ZONE_VALID(zone));
isc_task_attach(zone->task, target);
}
void
dns_zone_setidlein(dns_zone_t *zone, uint32_t idlein) {
REQUIRE(DNS_ZONE_VALID(zone));
if (idlein == 0)
idlein = DNS_DEFAULT_IDLEIN;
zone->idlein = idlein;
}
uint32_t
dns_zone_getidlein(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->idlein);
}
void
dns_zone_setidleout(dns_zone_t *zone, uint32_t idleout) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->idleout = idleout;
}
uint32_t
dns_zone_getidleout(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->idleout);
}
static void
notify_done(isc_task_t *task, isc_event_t *event) {
dns_requestevent_t *revent = (dns_requestevent_t *)event;
dns_notify_t *notify;
isc_result_t result;
dns_message_t *message = NULL;
isc_buffer_t buf;
char rcode[128];
char addrbuf[ISC_SOCKADDR_FORMATSIZE];
UNUSED(task);
notify = event->ev_arg;
REQUIRE(DNS_NOTIFY_VALID(notify));
INSIST(task == notify->zone->task);
isc_buffer_init(&buf, rcode, sizeof(rcode));
isc_sockaddr_format(¬ify->dst, addrbuf, sizeof(addrbuf));
result = revent->result;
if (result == ISC_R_SUCCESS)
result = dns_message_create(notify->zone->mctx,
DNS_MESSAGE_INTENTPARSE, &message);
if (result == ISC_R_SUCCESS)
result = dns_request_getresponse(revent->request, message,
DNS_MESSAGEPARSE_PRESERVEORDER);
if (result == ISC_R_SUCCESS)
result = dns_rcode_totext(message->rcode, &buf);
if (result == ISC_R_SUCCESS)
notify_log(notify->zone, ISC_LOG_DEBUG(3),
"notify response from %s: %.*s",
addrbuf, (int)buf.used, rcode);
else
notify_log(notify->zone, ISC_LOG_DEBUG(2),
"notify to %s failed: %s", addrbuf,
dns_result_totext(result));
/*
* Old bind's return formerr if they see a soa record. Retry w/o
* the soa if we see a formerr and had sent a SOA.
*/
isc_event_free(&event);
if (message != NULL && message->rcode == dns_rcode_formerr &&
(notify->flags & DNS_NOTIFY_NOSOA) == 0) {
bool startup;
notify->flags |= DNS_NOTIFY_NOSOA;
dns_request_destroy(¬ify->request);
startup = (notify->flags & DNS_NOTIFY_STARTUP);
result = notify_send_queue(notify, startup);
if (result != ISC_R_SUCCESS)
notify_destroy(notify, false);
} else {
if (result == ISC_R_TIMEDOUT)
notify_log(notify->zone, ISC_LOG_DEBUG(1),
"notify to %s: retries exceeded", addrbuf);
notify_destroy(notify, false);
}
if (message != NULL)
dns_message_destroy(&message);
}
struct secure_event {
isc_event_t e;
dns_db_t *db;
uint32_t serial;
};
static void
update_log_cb(void *arg, dns_zone_t *zone, int level, const char *message) {
UNUSED(arg);
dns_zone_log(zone, level, "%s", message);
}
static isc_result_t
sync_secure_journal(dns_zone_t *zone, dns_zone_t *raw, dns_journal_t *journal,
uint32_t start, uint32_t end,
dns_difftuple_t **soatuplep, dns_diff_t *diff)
{
isc_result_t result;
dns_difftuple_t *tuple = NULL;
dns_diffop_t op = DNS_DIFFOP_ADD;
int n_soa = 0;
REQUIRE(soatuplep != NULL);
if (start == end)
return (DNS_R_UNCHANGED);
CHECK(dns_journal_iter_init(journal, start, end));
for (result = dns_journal_first_rr(journal);
result == ISC_R_SUCCESS;
result = dns_journal_next_rr(journal))
{
dns_name_t *name = NULL;
uint32_t ttl;
dns_rdata_t *rdata = NULL;
dns_journal_current_rr(journal, &name, &ttl, &rdata);
if (rdata->type == dns_rdatatype_soa) {
n_soa++;
if (n_soa == 2) {
/*
* Save the latest raw SOA record.
*/
if (*soatuplep != NULL)
dns_difftuple_free(soatuplep);
CHECK(dns_difftuple_create(diff->mctx,
DNS_DIFFOP_ADD,
name, ttl, rdata,
soatuplep));
}
if (n_soa == 3)
n_soa = 1;
continue;
}
/* Sanity. */
if (n_soa == 0) {
dns_zone_log(raw, ISC_LOG_ERROR,
"corrupt journal file: '%s'\n",
raw->journal);
return (ISC_R_FAILURE);
}
if (zone->privatetype != 0 &&
rdata->type == zone->privatetype)
continue;
if (rdata->type == dns_rdatatype_nsec ||
rdata->type == dns_rdatatype_rrsig ||
rdata->type == dns_rdatatype_nsec3 ||
rdata->type == dns_rdatatype_dnskey ||
rdata->type == dns_rdatatype_nsec3param)
continue;
op = (n_soa == 1) ? DNS_DIFFOP_DEL : DNS_DIFFOP_ADD;
CHECK(dns_difftuple_create(diff->mctx, op, name, ttl, rdata,
&tuple));
dns_diff_appendminimal(diff, &tuple);
}
if (result == ISC_R_NOMORE)
result = ISC_R_SUCCESS;
failure:
return(result);
}
static isc_result_t
sync_secure_db(dns_zone_t *seczone, dns_zone_t *raw, dns_db_t *secdb,
dns_dbversion_t *secver, dns_difftuple_t **soatuple,
dns_diff_t *diff)
{
isc_result_t result;
dns_db_t *rawdb = NULL;
dns_dbversion_t *rawver = NULL;
dns_difftuple_t *tuple = NULL, *next;
dns_difftuple_t *oldtuple = NULL, *newtuple = NULL;
dns_rdata_soa_t oldsoa, newsoa;
REQUIRE(DNS_ZONE_VALID(seczone));
REQUIRE(soatuple != NULL && *soatuple == NULL);
if (!seczone->sourceserialset)
return (DNS_R_UNCHANGED);
dns_db_attach(raw->db, &rawdb);
dns_db_currentversion(rawdb, &rawver);
result = dns_db_diffx(diff, rawdb, rawver, secdb, secver, NULL);
dns_db_closeversion(rawdb, &rawver, false);
dns_db_detach(&rawdb);
if (result != ISC_R_SUCCESS)
return (result);
for (tuple = ISC_LIST_HEAD(diff->tuples);
tuple != NULL;
tuple = next)
{
next = ISC_LIST_NEXT(tuple, link);
if (tuple->rdata.type == dns_rdatatype_nsec ||
tuple->rdata.type == dns_rdatatype_rrsig ||
tuple->rdata.type == dns_rdatatype_dnskey ||
tuple->rdata.type == dns_rdatatype_nsec3 ||
tuple->rdata.type == dns_rdatatype_nsec3param)
{
ISC_LIST_UNLINK(diff->tuples, tuple, link);
dns_difftuple_free(&tuple);
continue;
}
if (tuple->rdata.type == dns_rdatatype_soa) {
if (tuple->op == DNS_DIFFOP_DEL) {
INSIST(oldtuple == NULL);
oldtuple = tuple;
}
if (tuple->op == DNS_DIFFOP_ADD) {
INSIST(newtuple == NULL);
newtuple = tuple;
}
}
}
if (oldtuple != NULL && newtuple != NULL) {
result = dns_rdata_tostruct(&oldtuple->rdata, &oldsoa, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
result = dns_rdata_tostruct(&newtuple->rdata, &newsoa, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
/*
* If the SOA records are the same except for the serial
* remove them from the diff.
*/
if (oldsoa.refresh == newsoa.refresh &&
oldsoa.retry == newsoa.retry &&
oldsoa.minimum == newsoa.minimum &&
oldsoa.expire == newsoa.expire &&
dns_name_equal(&oldsoa.origin, &newsoa.origin) &&
dns_name_equal(&oldsoa.contact, &newsoa.contact)) {
ISC_LIST_UNLINK(diff->tuples, oldtuple, link);
dns_difftuple_free(&oldtuple);
ISC_LIST_UNLINK(diff->tuples, newtuple, link);
dns_difftuple_free(&newtuple);
}
}
if (ISC_LIST_EMPTY(diff->tuples))
return (DNS_R_UNCHANGED);
/*
* If there are still SOA records in the diff they can now be removed
* saving the new SOA record.
*/
if (oldtuple != NULL) {
ISC_LIST_UNLINK(diff->tuples, oldtuple, link);
dns_difftuple_free(&oldtuple);
}
if (newtuple != NULL) {
ISC_LIST_UNLINK(diff->tuples, newtuple, link);
*soatuple = newtuple;
}
return (ISC_R_SUCCESS);
}
static void
receive_secure_serial(isc_task_t *task, isc_event_t *event) {
static char me[] = "receive_secure_serial";
isc_result_t result = ISC_R_SUCCESS;
dns_journal_t *rjournal = NULL;
dns_journal_t *sjournal = NULL;
uint32_t start, end;
dns_zone_t *zone;
dns_difftuple_t *tuple = NULL, *soatuple = NULL;
dns_update_log_t log = { update_log_cb, NULL };
uint32_t newserial = 0, desired = 0;
isc_time_t timenow;
int level = ISC_LOG_ERROR;
UNUSED(task);
zone = event->ev_arg;
end = ((struct secure_event *)event)->serial;
ENTER;
LOCK_ZONE(zone);
/*
* If we are already processing a receive secure serial event
* for the zone, just queue the new one and exit.
*/
if (zone->rss_event != NULL && zone->rss_event != event) {
ISC_LIST_APPEND(zone->rss_events, event, ev_link);
UNLOCK_ZONE(zone);
return;
}
nextevent:
if (zone->rss_event != NULL) {
INSIST(zone->rss_event == event);
UNLOCK_ZONE(zone);
} else {
zone->rss_event = event;
dns_diff_init(zone->mctx, &zone->rss_diff);
/*
* zone->db may be NULL, if the load from disk failed.
*/
result = ISC_R_SUCCESS;
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL) {
dns_db_attach(zone->db, &zone->rss_db);
} else {
result = ISC_R_FAILURE;
}
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
if (result == ISC_R_SUCCESS && zone->raw != NULL) {
dns_zone_attach(zone->raw, &zone->rss_raw);
} else {
result = ISC_R_FAILURE;
}
UNLOCK_ZONE(zone);
CHECK(result);
/*
* We first attempt to sync the raw zone to the secure zone
* by using the raw zone's journal, applying all the deltas
* from the latest source-serial of the secure zone up to
* the current serial number of the raw zone.
*
* If that fails, then we'll fall back to a direct comparison
* between raw and secure zones.
*/
CHECK(dns_journal_open(zone->rss_raw->mctx,
zone->rss_raw->journal,
DNS_JOURNAL_WRITE, &rjournal));
result = dns_journal_open(zone->mctx, zone->journal,
DNS_JOURNAL_READ, &sjournal);
if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND) {
goto failure;
}
if (!dns_journal_get_sourceserial(rjournal, &start)) {
start = dns_journal_first_serial(rjournal);
dns_journal_set_sourceserial(rjournal, start);
}
if (sjournal != NULL) {
uint32_t serial;
/*
* We read the secure journal first, if that
* exists use its value provided it is greater
* that from the raw journal.
*/
if (dns_journal_get_sourceserial(sjournal, &serial)) {
if (isc_serial_gt(serial, start))
start = serial;
}
dns_journal_destroy(&sjournal);
}
dns_db_currentversion(zone->rss_db, &zone->rss_oldver);
CHECK(dns_db_newversion(zone->rss_db, &zone->rss_newver));
/*
* Try to apply diffs from the raw zone's journal to the secure
* zone. If that fails, we recover by syncing up the databases
* directly.
*/
result = sync_secure_journal(zone, zone->rss_raw, rjournal,
start, end, &soatuple,
&zone->rss_diff);
if (result == DNS_R_UNCHANGED) {
level = ISC_LOG_INFO;
goto failure;
} else if (result != ISC_R_SUCCESS) {
CHECK(sync_secure_db(zone, zone->rss_raw, zone->rss_db,
zone->rss_oldver, &soatuple,
&zone->rss_diff));
}
CHECK(dns_diff_apply(&zone->rss_diff, zone->rss_db,
zone->rss_newver));
if (soatuple != NULL) {
uint32_t oldserial;
CHECK(dns_db_createsoatuple(zone->rss_db,
zone->rss_oldver,
zone->rss_diff.mctx,
DNS_DIFFOP_DEL, &tuple));
oldserial = dns_soa_getserial(&tuple->rdata);
newserial = desired =
dns_soa_getserial(&soatuple->rdata);
if (!isc_serial_gt(newserial, oldserial)) {
newserial = oldserial + 1;
if (newserial == 0) {
newserial++;
}
dns_soa_setserial(newserial, &soatuple->rdata);
}
CHECK(do_one_tuple(&tuple, zone->rss_db,
zone->rss_newver, &zone->rss_diff));
CHECK(do_one_tuple(&soatuple, zone->rss_db,
zone->rss_newver, &zone->rss_diff));
} else {
CHECK(update_soa_serial(zone->rss_db, zone->rss_newver,
&zone->rss_diff, zone->mctx,
zone->updatemethod));
}
}
result = dns_update_signaturesinc(&log, zone, zone->rss_db,
zone->rss_oldver, zone->rss_newver,
&zone->rss_diff,
zone->sigvalidityinterval,
&zone->rss_state);
if (result == DNS_R_CONTINUE) {
if (rjournal != NULL) {
dns_journal_destroy(&rjournal);
}
isc_task_send(task, &event);
return;
}
/*
* If something went wrong while trying to update the secure zone and
* the latter was already signed before, do not apply raw zone deltas
* to it as that would break existing DNSSEC signatures. However, if
* the secure zone was not yet signed (e.g. because no signing keys
* were created for it), commence applying raw zone deltas to it so
* that contents of the raw zone and the secure zone are kept in sync.
*/
if (result != ISC_R_SUCCESS && dns_db_issecure(zone->rss_db)) {
goto failure;
}
if (rjournal == NULL) {
CHECK(dns_journal_open(zone->rss_raw->mctx,
zone->rss_raw->journal,
DNS_JOURNAL_WRITE, &rjournal));
}
CHECK(zone_journal(zone, &zone->rss_diff, &end,
"receive_secure_serial"));
dns_journal_set_sourceserial(rjournal, end);
dns_journal_commit(rjournal);
LOCK_ZONE(zone);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDNOTIFY);
zone->sourceserial = end;
zone->sourceserialset = true;
zone_needdump(zone, DNS_DUMP_DELAY);
/*
* Set resign time to make sure it is set to the earliest
* signature expiration.
*/
set_resigntime(zone);
TIME_NOW(&timenow);
zone_settimer(zone, &timenow);
UNLOCK_ZONE(zone);
dns_db_closeversion(zone->rss_db, &zone->rss_oldver, false);
dns_db_closeversion(zone->rss_db, &zone->rss_newver, true);
if (newserial != 0) {
dns_zone_log(zone, ISC_LOG_INFO, "serial %u (unsigned %u)",
newserial, desired);
}
failure:
isc_event_free(&zone->rss_event);
event = ISC_LIST_HEAD(zone->rss_events);
if (zone->rss_raw != NULL) {
dns_zone_detach(&zone->rss_raw);
}
if (result != ISC_R_SUCCESS) {
LOCK_ZONE(zone);
set_resigntime(zone);
TIME_NOW(&timenow);
zone_settimer(zone, &timenow);
UNLOCK_ZONE(zone);
dns_zone_log(zone, level, "receive_secure_serial: %s",
dns_result_totext(result));
}
if (tuple != NULL) {
dns_difftuple_free(&tuple);
}
if (soatuple != NULL) {
dns_difftuple_free(&soatuple);
}
if (zone->rss_db != NULL) {
if (zone->rss_oldver != NULL) {
dns_db_closeversion(zone->rss_db, &zone->rss_oldver,
false);
}
if (zone->rss_newver != NULL) {
dns_db_closeversion(zone->rss_db, &zone->rss_newver,
false);
}
dns_db_detach(&zone->rss_db);
}
INSIST(zone->rss_oldver == NULL);
INSIST(zone->rss_newver == NULL);
if (rjournal != NULL) {
dns_journal_destroy(&rjournal);
}
dns_diff_clear(&zone->rss_diff);
if (event != NULL) {
LOCK_ZONE(zone);
INSIST(zone->irefs > 1);
zone->irefs--;
ISC_LIST_UNLINK(zone->rss_events, event, ev_link);
goto nextevent;
}
event = ISC_LIST_HEAD(zone->rss_post);
while (event != NULL) {
ISC_LIST_UNLINK(zone->rss_post, event, ev_link);
rss_post(zone, event);
event = ISC_LIST_HEAD(zone->rss_post);
}
dns_zone_idetach(&zone);
}
static isc_result_t
zone_send_secureserial(dns_zone_t *zone, uint32_t serial) {
isc_event_t *e;
dns_zone_t *dummy = NULL;
e = isc_event_allocate(zone->secure->mctx, zone,
DNS_EVENT_ZONESECURESERIAL,
receive_secure_serial, zone->secure,
sizeof(struct secure_event));
if (e == NULL)
return (ISC_R_NOMEMORY);
((struct secure_event *)e)->serial = serial;
INSIST(LOCKED_ZONE(zone->secure));
zone_iattach(zone->secure, &dummy);
isc_task_send(zone->secure->task, &e);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_SENDSECURE);
return (ISC_R_SUCCESS);
}
static isc_result_t
checkandaddsoa(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
dns_rdataset_t *rdataset, uint32_t oldserial)
{
dns_rdata_soa_t soa;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdatalist_t temprdatalist;
dns_rdataset_t temprdataset;
isc_buffer_t b;
isc_result_t result;
unsigned char buf[DNS_SOA_BUFFERSIZE];
dns_fixedname_t fixed;
dns_name_t *name;
result = dns_rdataset_first(rdataset);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_rdataset_current(rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &soa, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (isc_serial_gt(soa.serial, oldserial))
return (dns_db_addrdataset(db, node, version, 0, rdataset, 0,
NULL));
/*
* Always bump the serial.
*/
oldserial++;
if (oldserial == 0)
oldserial++;
soa.serial = oldserial;
/*
* Construct a replacement rdataset.
*/
dns_rdata_reset(&rdata);
isc_buffer_init(&b, buf, sizeof(buf));
result = dns_rdata_fromstruct(&rdata, rdataset->rdclass,
dns_rdatatype_soa, &soa, &b);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_rdatalist_init(&temprdatalist);
temprdatalist.rdclass = rdata.rdclass;
temprdatalist.type = rdata.type;
temprdatalist.ttl = rdataset->ttl;
ISC_LIST_APPEND(temprdatalist.rdata, &rdata, link);
dns_rdataset_init(&temprdataset);
result = dns_rdatalist_tordataset(&temprdatalist, &temprdataset);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
name = dns_fixedname_initname(&fixed);
result = dns_db_nodefullname(db, node, name);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_rdataset_getownercase(rdataset, name);
dns_rdataset_setownercase(&temprdataset, name);
return (dns_db_addrdataset(db, node, version, 0, &temprdataset,
0, NULL));
}
/*
* This function should populate an nsec3paramlist_t with the
* nsecparam_t data from a zone.
*/
static isc_result_t
save_nsec3param(dns_zone_t *zone, nsec3paramlist_t *nsec3list) {
isc_result_t result;
dns_dbnode_t *node = NULL;
dns_rdataset_t rdataset, prdataset;
dns_dbversion_t *version = NULL;
nsec3param_t *nsec3param = NULL;
nsec3param_t *nsec3p = NULL;
nsec3param_t *next;
dns_db_t *db = NULL;
unsigned char buf[DNS_NSEC3PARAM_BUFFERSIZE];
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(nsec3list != NULL);
REQUIRE(ISC_LIST_EMPTY(*nsec3list));
dns_rdataset_init(&rdataset);
dns_rdataset_init(&prdataset);
dns_db_attach(zone->db, &db);
CHECK(dns_db_getoriginnode(db, &node));
dns_db_currentversion(db, &version);
result = dns_db_findrdataset(db, node, version,
dns_rdatatype_nsec3param,
dns_rdatatype_none, 0, &rdataset, NULL);
if (result != ISC_R_SUCCESS)
goto getprivate;
/*
* walk nsec3param rdataset making a list of parameters (note that
* multiple simultaneous nsec3 chains are annoyingly legal -- this
* is why we use an nsec3list, even though we will usually only have
* one)
*/
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset))
{
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdata_t private = DNS_RDATA_INIT;
dns_rdataset_current(&rdataset, &rdata);
isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
DNS_LOGMODULE_ZONE, ISC_LOG_DEBUG(3),
"looping through nsec3param data");
nsec3param = isc_mem_get(zone->mctx, sizeof(nsec3param_t));
if (nsec3param == NULL)
CHECK(ISC_R_NOMEMORY);
ISC_LINK_INIT(nsec3param, link);
/*
* now transfer the data from the rdata to
* the nsec3param
*/
dns_nsec3param_toprivate(&rdata, &private,
zone->privatetype, nsec3param->data,
sizeof(nsec3param->data));
nsec3param->length = private.length;
ISC_LIST_APPEND(*nsec3list, nsec3param, link);
}
getprivate:
result = dns_db_findrdataset(db, node, version, zone->privatetype,
dns_rdatatype_none, 0, &prdataset, NULL);
if (result != ISC_R_SUCCESS)
goto done;
/*
* walk private type records, converting them to nsec3 parameters
* using dns_nsec3param_fromprivate(), do the right thing based on
* CREATE and REMOVE flags
*/
for (result = dns_rdataset_first(&prdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&prdataset))
{
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdata_t private = DNS_RDATA_INIT;
dns_rdataset_current(&prdataset, &private);
isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
DNS_LOGMODULE_ZONE, ISC_LOG_DEBUG(3),
"looping through nsec3param private data");
/*
* Do we have a valid private record?
*/
if (!dns_nsec3param_fromprivate(&private, &rdata,
buf, sizeof(buf)))
continue;
/*
* Remove any NSEC3PARAM records scheduled to be removed.
*/
if (NSEC3REMOVE(rdata.data[1])) {
/*
* Zero out the flags.
*/
rdata.data[1] = 0;
for (nsec3p = ISC_LIST_HEAD(*nsec3list);
nsec3p != NULL;
nsec3p = next)
{
next = ISC_LIST_NEXT(nsec3p, link);
if (nsec3p->length == rdata.length + 1 &&
memcmp(rdata.data, nsec3p->data + 1,
nsec3p->length - 1) == 0) {
ISC_LIST_UNLINK(*nsec3list,
nsec3p, link);
isc_mem_put(zone->mctx, nsec3p,
sizeof(nsec3param_t));
}
}
continue;
}
nsec3param = isc_mem_get(zone->mctx, sizeof(nsec3param_t));
if (nsec3param == NULL)
CHECK(ISC_R_NOMEMORY);
ISC_LINK_INIT(nsec3param, link);
/*
* Copy the remaining private records so the nsec/nsec3
* chain gets created.
*/
INSIST(private.length <= sizeof(nsec3param->data));
memmove(nsec3param->data, private.data, private.length);
nsec3param->length = private.length;
ISC_LIST_APPEND(*nsec3list, nsec3param, link);
}
done:
if (result == ISC_R_NOMORE || result == ISC_R_NOTFOUND)
result = ISC_R_SUCCESS;
failure:
if (node != NULL)
dns_db_detachnode(db, &node);
if (version != NULL)
dns_db_closeversion(db, &version, false);
if (db != NULL)
dns_db_detach(&db);
if (dns_rdataset_isassociated(&rdataset))
dns_rdataset_disassociate(&rdataset);
if (dns_rdataset_isassociated(&prdataset))
dns_rdataset_disassociate(&prdataset);
return (result);
}
/*
* Populate new zone db with private type records found by save_nsec3param().
*/
static isc_result_t
restore_nsec3param(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *version,
nsec3paramlist_t *nsec3list)
{
isc_result_t result = ISC_R_SUCCESS;
dns_diff_t diff;
dns_rdata_t rdata;
nsec3param_t *nsec3p = NULL;
nsec3param_t *next;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(!ISC_LIST_EMPTY(*nsec3list));
dns_diff_init(zone->mctx, &diff);
/*
* Loop through the list of private-type records, set the INITIAL
* and CREATE flags, and the add the record to the apex of the tree
* in db.
*/
for (nsec3p = ISC_LIST_HEAD(*nsec3list);
nsec3p != NULL;
nsec3p = next)
{
next = ISC_LIST_NEXT(nsec3p, link);
dns_rdata_init(&rdata);
nsec3p->data[2] = DNS_NSEC3FLAG_CREATE | DNS_NSEC3FLAG_INITIAL;
rdata.length = nsec3p->length;
rdata.data = nsec3p->data;
rdata.type = zone->privatetype;
rdata.rdclass = zone->rdclass;
result = update_one_rr(db, version, &diff, DNS_DIFFOP_ADD,
&zone->origin, 0, &rdata);
if (result != ISC_R_SUCCESS) {
break;
}
}
dns_diff_clear(&diff);
return (result);
}
static isc_result_t
copy_non_dnssec_records(dns_db_t *db, dns_db_t *version, dns_db_t *rawdb,
dns_dbiterator_t *dbiterator, unsigned int *oldserial)
{
dns_dbnode_t *rawnode = NULL, *node = NULL;
dns_fixedname_t fixed;
dns_name_t *name = dns_fixedname_initname(&fixed);
dns_rdataset_t rdataset;
dns_rdatasetiter_t *rdsit = NULL;
isc_result_t result;
result = dns_dbiterator_current(dbiterator, &rawnode, name);
if (result != ISC_R_SUCCESS) {
return (ISC_R_SUCCESS);
}
result = dns_db_findnode(db, name, true, &node);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
result = dns_db_allrdatasets(rawdb, rawnode, NULL, 0, &rdsit);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
dns_rdataset_init(&rdataset);
for (result = dns_rdatasetiter_first(rdsit);
result == ISC_R_SUCCESS;
result = dns_rdatasetiter_next(rdsit))
{
dns_rdatasetiter_current(rdsit, &rdataset);
if (rdataset.type == dns_rdatatype_nsec ||
rdataset.type == dns_rdatatype_rrsig ||
rdataset.type == dns_rdatatype_nsec3 ||
rdataset.type == dns_rdatatype_dnskey ||
rdataset.type == dns_rdatatype_nsec3param) {
dns_rdataset_disassociate(&rdataset);
continue;
}
if (rdataset.type == dns_rdatatype_soa && oldserial != NULL) {
result = checkandaddsoa(db, node, version,
&rdataset, *oldserial);
} else {
result = dns_db_addrdataset(db, node, version,
0, &rdataset, 0,
NULL);
}
dns_rdataset_disassociate(&rdataset);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
}
if (result == ISC_R_NOMORE) {
result = ISC_R_SUCCESS;
}
cleanup:
if (rdsit != NULL) {
dns_rdatasetiter_destroy(&rdsit);
}
if (rawnode) {
dns_db_detachnode(rawdb, &rawnode);
}
if (node) {
dns_db_detachnode(db, &node);
}
return (result);
}
static void
receive_secure_db(isc_task_t *task, isc_event_t *event) {
isc_result_t result;
dns_zone_t *zone;
dns_db_t *rawdb, *db = NULL;
dns_dbiterator_t *dbiterator = NULL;
dns_dbversion_t *version = NULL;
isc_time_t loadtime;
unsigned int oldserial = 0, *oldserialp = NULL;
nsec3paramlist_t nsec3list;
isc_event_t *setnsec3param_event;
dns_zone_t *dummy;
UNUSED(task);
ISC_LIST_INIT(nsec3list);
zone = event->ev_arg;
rawdb = ((struct secure_event *)event)->db;
isc_event_free(&event);
LOCK_ZONE(zone);
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING) || !inline_secure(zone)) {
result = ISC_R_SHUTTINGDOWN;
goto failure;
}
TIME_NOW(&loadtime);
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL) {
result = dns_db_getsoaserial(zone->db, NULL, &oldserial);
if (result == ISC_R_SUCCESS) {
oldserialp = &oldserial;
}
/*
* assemble nsec3parameters from the old zone, and set a flag
* if any are found
*/
result = save_nsec3param(zone, &nsec3list);
if (result != ISC_R_SUCCESS) {
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
goto failure;
}
}
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
result = dns_db_create(zone->mctx, zone->db_argv[0],
&zone->origin, dns_dbtype_zone, zone->rdclass,
zone->db_argc - 1, zone->db_argv + 1, &db);
if (result != ISC_R_SUCCESS) {
goto failure;
}
result = dns_db_newversion(db, &version);
if (result != ISC_R_SUCCESS) {
goto failure;
}
result = dns_db_createiterator(rawdb, 0, &dbiterator);
if (result != ISC_R_SUCCESS) {
goto failure;
}
for (result = dns_dbiterator_first(dbiterator);
result == ISC_R_SUCCESS;
result = dns_dbiterator_next(dbiterator))
{
result = copy_non_dnssec_records(db, version, rawdb,
dbiterator, oldserialp);
if (result != ISC_R_SUCCESS) {
goto failure;
}
}
dns_dbiterator_destroy(&dbiterator);
if (result != ISC_R_NOMORE) {
goto failure;
}
/*
* Call restore_nsec3param() to create private-type records from
* the old nsec3 parameters and insert them into db
*/
if (!ISC_LIST_EMPTY(nsec3list)) {
result = restore_nsec3param(zone, db, version, &nsec3list);
if (result != ISC_R_SUCCESS) {
goto failure;
}
}
dns_db_closeversion(db, &version, true);
/*
* Lock hierarchy: zmgr, zone, raw.
*/
INSIST(zone != zone->raw);
LOCK_ZONE(zone->raw);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDNOTIFY);
result = zone_postload(zone, db, loadtime, ISC_R_SUCCESS);
zone_needdump(zone, 0); /* XXXMPA */
UNLOCK_ZONE(zone->raw);
/*
* Process any queued NSEC3PARAM change requests.
*/
while (!ISC_LIST_EMPTY(zone->setnsec3param_queue)) {
setnsec3param_event = ISC_LIST_HEAD(zone->setnsec3param_queue);
ISC_LIST_UNLINK(zone->setnsec3param_queue, setnsec3param_event,
ev_link);
dummy = NULL;
zone_iattach(zone, &dummy);
isc_task_send(zone->task, &setnsec3param_event);
}
failure:
UNLOCK_ZONE(zone);
if (dbiterator != NULL) {
dns_dbiterator_destroy(&dbiterator);
}
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR, "receive_secure_db: %s",
dns_result_totext(result));
}
while (!ISC_LIST_EMPTY(nsec3list)) {
nsec3param_t *nsec3p;
nsec3p = ISC_LIST_HEAD(nsec3list);
ISC_LIST_UNLINK(nsec3list, nsec3p, link);
isc_mem_put(zone->mctx, nsec3p, sizeof(nsec3param_t));
}
if (db != NULL) {
if (version != NULL) {
dns_db_closeversion(db, &version, false);
}
dns_db_detach(&db);
}
dns_db_detach(&rawdb);
dns_zone_idetach(&zone);
INSIST(version == NULL);
}
static isc_result_t
zone_send_securedb(dns_zone_t *zone, dns_db_t *db) {
isc_event_t *e;
dns_db_t *dummy = NULL;
dns_zone_t *secure = NULL;
e = isc_event_allocate(zone->secure->mctx, zone,
DNS_EVENT_ZONESECUREDB,
receive_secure_db, zone->secure,
sizeof(struct secure_event));
if (e == NULL)
return (ISC_R_NOMEMORY);
dns_db_attach(db, &dummy);
((struct secure_event *)e)->db = dummy;
INSIST(LOCKED_ZONE(zone->secure));
zone_iattach(zone->secure, &secure);
isc_task_send(zone->secure->task, &e);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_SENDSECURE);
return (ISC_R_SUCCESS);
}
isc_result_t
dns_zone_replacedb(dns_zone_t *zone, dns_db_t *db, bool dump) {
isc_result_t result;
dns_zone_t *secure = NULL;
REQUIRE(DNS_ZONE_VALID(zone));
again:
LOCK_ZONE(zone);
if (inline_raw(zone)) {
secure = zone->secure;
INSIST(secure != zone);
TRYLOCK_ZONE(result, secure);
if (result != ISC_R_SUCCESS) {
UNLOCK_ZONE(zone);
secure = NULL;
#if ISC_PLATFORM_USETHREADS
isc_thread_yield();
#endif
goto again;
}
}
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_write);
result = zone_replacedb(zone, db, dump);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_write);
if (secure != NULL)
UNLOCK_ZONE(secure);
UNLOCK_ZONE(zone);
return (result);
}
static isc_result_t
zone_replacedb(dns_zone_t *zone, dns_db_t *db, bool dump) {
dns_dbversion_t *ver;
isc_result_t result;
unsigned int soacount = 0;
unsigned int nscount = 0;
/*
* 'zone' and 'zonedb' locked by caller.
*/
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(LOCKED_ZONE(zone));
if (inline_raw(zone))
REQUIRE(LOCKED_ZONE(zone->secure));
result = dns_db_rpz_ready(db);
if (result != ISC_R_SUCCESS)
return (result);
result = zone_get_from_db(zone, db, &nscount, &soacount,
NULL, NULL, NULL, NULL, NULL, NULL);
if (result == ISC_R_SUCCESS) {
if (soacount != 1) {
dns_zone_log(zone, ISC_LOG_ERROR,
"has %d SOA records", soacount);
result = DNS_R_BADZONE;
}
if (nscount == 0 && zone->type != dns_zone_key) {
dns_zone_log(zone, ISC_LOG_ERROR, "has no NS records");
result = DNS_R_BADZONE;
}
if (result != ISC_R_SUCCESS)
return (result);
} else {
dns_zone_log(zone, ISC_LOG_ERROR,
"retrieving SOA and NS records failed: %s",
dns_result_totext(result));
return (result);
}
result = check_nsec3param(zone, db);
if (result != ISC_R_SUCCESS)
return (result);
ver = NULL;
dns_db_currentversion(db, &ver);
/*
* The initial version of a slave zone is always dumped;
* subsequent versions may be journaled instead if this
* is enabled in the configuration.
*/
if (zone->db != NULL && zone->journal != NULL &&
DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IXFRFROMDIFFS) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FORCEXFER))
{
uint32_t serial, oldserial;
dns_zone_log(zone, ISC_LOG_DEBUG(3), "generating diffs");
result = dns_db_getsoaserial(db, ver, &serial);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"ixfr-from-differences: unable to get "
"new serial");
goto fail;
}
/*
* This is checked in zone_postload() for master zones.
*/
result = zone_get_from_db(zone, zone->db, NULL, &soacount,
&oldserial, NULL, NULL, NULL, NULL,
NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
RUNTIME_CHECK(soacount > 0U);
if ((zone->type == dns_zone_slave ||
(zone->type == dns_zone_redirect &&
zone->masters != NULL))
&& !isc_serial_gt(serial, oldserial)) {
uint32_t serialmin, serialmax;
serialmin = (oldserial + 1) & 0xffffffffU;
serialmax = (oldserial + 0x7fffffffU) & 0xffffffffU;
dns_zone_log(zone, ISC_LOG_ERROR,
"ixfr-from-differences: failed: "
"new serial (%u) out of range [%u - %u]",
serial, serialmin, serialmax);
result = ISC_R_RANGE;
goto fail;
}
result = dns_db_diff(zone->mctx, db, ver, zone->db, NULL,
zone->journal);
if (result != ISC_R_SUCCESS) {
char strbuf[ISC_STRERRORSIZE];
isc__strerror(errno, strbuf, sizeof(strbuf));
dns_zone_log(zone, ISC_LOG_ERROR,
"ixfr-from-differences: failed: "
"%s", strbuf);
goto fallback;
}
if (dump)
zone_needdump(zone, DNS_DUMP_DELAY);
else if (zone->journalsize != -1) {
result = dns_journal_compact(zone->mctx, zone->journal,
serial, zone->journalsize);
switch (result) {
case ISC_R_SUCCESS:
case ISC_R_NOSPACE:
case ISC_R_NOTFOUND:
dns_zone_log(zone, ISC_LOG_DEBUG(3),
"dns_journal_compact: %s",
dns_result_totext(result));
break;
default:
dns_zone_log(zone, ISC_LOG_ERROR,
"dns_journal_compact failed: %s",
dns_result_totext(result));
break;
}
}
if (zone->type == dns_zone_master && inline_raw(zone))
zone_send_secureserial(zone, serial);
} else {
fallback:
if (dump && zone->masterfile != NULL) {
/*
* If DNS_ZONEFLG_FORCEXFER was set we don't want
* to keep the old masterfile.
*/
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FORCEXFER) &&
remove(zone->masterfile) < 0 && errno != ENOENT) {
char strbuf[ISC_STRERRORSIZE];
isc__strerror(errno, strbuf, sizeof(strbuf));
isc_log_write(dns_lctx,
DNS_LOGCATEGORY_GENERAL,
DNS_LOGMODULE_ZONE,
ISC_LOG_WARNING,
"unable to remove masterfile "
"'%s': '%s'",
zone->masterfile, strbuf);
}
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED) == 0)
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NODELAY);
else
zone_needdump(zone, 0);
}
if (dump && zone->journal != NULL) {
/*
* The in-memory database just changed, and
* because 'dump' is set, it didn't change by
* being loaded from disk. Also, we have not
* journaled diffs for this change.
* Therefore, the on-disk journal is missing
* the deltas for this change. Since it can
* no longer be used to bring the zone
* up-to-date, it is useless and should be
* removed.
*/
isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
DNS_LOGMODULE_ZONE, ISC_LOG_DEBUG(3),
"removing journal file");
if (remove(zone->journal) < 0 && errno != ENOENT) {
char strbuf[ISC_STRERRORSIZE];
isc__strerror(errno, strbuf, sizeof(strbuf));
isc_log_write(dns_lctx,
DNS_LOGCATEGORY_GENERAL,
DNS_LOGMODULE_ZONE,
ISC_LOG_WARNING,
"unable to remove journal "
"'%s': '%s'",
zone->journal, strbuf);
}
}
if (inline_raw(zone))
zone_send_securedb(zone, db);
}
dns_db_closeversion(db, &ver, false);
dns_zone_log(zone, ISC_LOG_DEBUG(3), "replacing zone database");
if (zone->db != NULL)
zone_detachdb(zone);
zone_attachdb(zone, db);
dns_db_settask(zone->db, zone->task);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_LOADED|DNS_ZONEFLG_NEEDNOTIFY);
return (ISC_R_SUCCESS);
fail:
dns_db_closeversion(db, &ver, false);
return (result);
}
/* The caller must hold the dblock as a writer. */
static inline void
zone_attachdb(dns_zone_t *zone, dns_db_t *db) {
REQUIRE(zone->db == NULL && db != NULL);
dns_db_attach(db, &zone->db);
if (zone->acache != NULL) {
isc_result_t result;
result = dns_acache_setdb(zone->acache, db);
if (result != ISC_R_SUCCESS && result != ISC_R_EXISTS) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"dns_acache_setdb() failed: %s",
isc_result_totext(result));
}
}
}
/* The caller must hold the dblock as a writer. */
static inline void
zone_detachdb(dns_zone_t *zone) {
REQUIRE(zone->db != NULL);
if (zone->acache != NULL)
(void)dns_acache_putdb(zone->acache, zone->db);
dns_db_detach(&zone->db);
}
static void
zone_xfrdone(dns_zone_t *zone, isc_result_t result) {
isc_time_t now;
bool again = false;
unsigned int soacount;
unsigned int nscount;
uint32_t serial, refresh, retry, expire, minimum;
isc_result_t xfrresult = result;
bool free_needed;
dns_zone_t *secure = NULL;
REQUIRE(DNS_ZONE_VALID(zone));
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"zone transfer finished: %s", dns_result_totext(result));
/*
* Obtaining a lock on the zone->secure (see zone_send_secureserial)
* could result in a deadlock due to a LOR so we will spin if we
* can't obtain the both locks.
*/
again:
LOCK_ZONE(zone);
if (inline_raw(zone)) {
secure = zone->secure;
INSIST(secure != zone);
TRYLOCK_ZONE(result, secure);
if (result != ISC_R_SUCCESS) {
UNLOCK_ZONE(zone);
secure = NULL;
#if ISC_PLATFORM_USETHREADS
isc_thread_yield();
#endif
goto again;
}
}
INSIST((zone->flags & DNS_ZONEFLG_REFRESH) != 0);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_REFRESH);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_SOABEFOREAXFR);
TIME_NOW(&now);
switch (xfrresult) {
case ISC_R_SUCCESS:
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDNOTIFY);
/* FALLTHROUGH */
case DNS_R_UPTODATE:
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_FORCEXFER);
/*
* Has the zone expired underneath us?
*/
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db == NULL) {
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
goto same_master;
}
/*
* Update the zone structure's data from the actual
* SOA received.
*/
nscount = 0;
soacount = 0;
INSIST(zone->db != NULL);
result = zone_get_from_db(zone, zone->db, &nscount,
&soacount, &serial, &refresh,
&retry, &expire, &minimum, NULL);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
if (result == ISC_R_SUCCESS) {
if (soacount != 1)
dns_zone_log(zone, ISC_LOG_ERROR,
"transferred zone "
"has %d SOA record%s", soacount,
(soacount != 0) ? "s" : "");
if (nscount == 0) {
dns_zone_log(zone, ISC_LOG_ERROR,
"transferred zone "
"has no NS records");
if (DNS_ZONE_FLAG(zone,
DNS_ZONEFLG_HAVETIMERS)) {
zone->refresh = DNS_ZONE_DEFAULTREFRESH;
zone->retry = DNS_ZONE_DEFAULTRETRY;
}
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_HAVETIMERS);
zone_unload(zone);
goto next_master;
}
zone->refresh = RANGE(refresh, zone->minrefresh,
zone->maxrefresh);
zone->retry = RANGE(retry, zone->minretry,
zone->maxretry);
zone->expire = RANGE(expire,
zone->refresh + zone->retry,
DNS_MAX_EXPIRE);
zone->minimum = minimum;
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_HAVETIMERS);
}
/*
* Set our next update/expire times.
*/
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDREFRESH)) {
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDREFRESH);
zone->refreshtime = now;
DNS_ZONE_TIME_ADD(&now, zone->expire,
&zone->expiretime);
} else {
DNS_ZONE_JITTER_ADD(&now, zone->refresh,
&zone->refreshtime);
DNS_ZONE_TIME_ADD(&now, zone->expire,
&zone->expiretime);
}
if (result == ISC_R_SUCCESS && xfrresult == ISC_R_SUCCESS) {
char buf[DNS_NAME_FORMATSIZE + sizeof(": TSIG ''")];
if (zone->tsigkey != NULL) {
char namebuf[DNS_NAME_FORMATSIZE];
dns_name_format(&zone->tsigkey->name, namebuf,
sizeof(namebuf));
snprintf(buf, sizeof(buf), ": TSIG '%s'",
namebuf);
} else
buf[0] = '\0';
dns_zone_log(zone, ISC_LOG_INFO,
"transferred serial %u%s",
serial, buf);
if (inline_raw(zone))
zone_send_secureserial(zone, serial);
}
/*
* This is not necessary if we just performed a AXFR
* however it is necessary for an IXFR / UPTODATE and
* won't hurt with an AXFR.
*/
if (zone->masterfile != NULL || zone->journal != NULL) {
unsigned int delay = DNS_DUMP_DELAY;
result = ISC_R_FAILURE;
if (zone->journal != NULL)
result = isc_file_settime(zone->journal, &now);
if (result != ISC_R_SUCCESS &&
zone->masterfile != NULL)
result = isc_file_settime(zone->masterfile,
&now);
if ((DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NODELAY) != 0) ||
result == ISC_R_FILENOTFOUND)
delay = 0;
if ((result == ISC_R_SUCCESS ||
result == ISC_R_FILENOTFOUND) &&
zone->masterfile != NULL)
zone_needdump(zone, delay);
else if (result != ISC_R_SUCCESS)
dns_zone_log(zone, ISC_LOG_ERROR,
"transfer: could not set file "
"modification time of '%s': %s",
zone->masterfile,
dns_result_totext(result));
}
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NODELAY);
inc_stats(zone, dns_zonestatscounter_xfrsuccess);
break;
case DNS_R_BADIXFR:
/* Force retry with AXFR. */
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLAG_NOIXFR);
goto same_master;
case DNS_R_TOOMANYRECORDS:
DNS_ZONE_JITTER_ADD(&now, zone->refresh, &zone->refreshtime);
inc_stats(zone, dns_zonestatscounter_xfrfail);
break;
default:
next_master:
/*
* Skip to next failed / untried master.
*/
do {
zone->curmaster++;
} while (zone->curmaster < zone->masterscnt &&
zone->mastersok[zone->curmaster]);
/* FALLTHROUGH */
same_master:
if (zone->curmaster >= zone->masterscnt) {
zone->curmaster = 0;
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_USEALTXFRSRC) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEALTXFRSRC)) {
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_REFRESH);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_USEALTXFRSRC);
while (zone->curmaster < zone->masterscnt &&
zone->mastersok[zone->curmaster])
zone->curmaster++;
again = true;
} else
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_USEALTXFRSRC);
} else {
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_REFRESH);
again = true;
}
inc_stats(zone, dns_zonestatscounter_xfrfail);
break;
}
zone_settimer(zone, &now);
/*
* If creating the transfer object failed, zone->xfr is NULL.
* Otherwise, we are called as the done callback of a zone
* transfer object that just entered its shutting-down
* state. Since we are no longer responsible for shutting
* it down, we can detach our reference.
*/
if (zone->xfr != NULL)
dns_xfrin_detach(&zone->xfr);
if (zone->tsigkey != NULL)
dns_tsigkey_detach(&zone->tsigkey);
/*
* Handle any deferred journal compaction.
*/
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDCOMPACT)) {
result = dns_journal_compact(zone->mctx, zone->journal,
zone->compact_serial,
zone->journalsize);
switch (result) {
case ISC_R_SUCCESS:
case ISC_R_NOSPACE:
case ISC_R_NOTFOUND:
dns_zone_log(zone, ISC_LOG_DEBUG(3),
"dns_journal_compact: %s",
dns_result_totext(result));
break;
default:
dns_zone_log(zone, ISC_LOG_ERROR,
"dns_journal_compact failed: %s",
dns_result_totext(result));
break;
}
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDCOMPACT);
}
if (secure != NULL)
UNLOCK_ZONE(secure);
/*
* This transfer finishing freed up a transfer quota slot.
* Let any other zones waiting for quota have it.
*/
if (zone->zmgr != NULL &&
zone->statelist == &zone->zmgr->xfrin_in_progress) {
UNLOCK_ZONE(zone);
RWLOCK(&zone->zmgr->rwlock, isc_rwlocktype_write);
ISC_LIST_UNLINK(zone->zmgr->xfrin_in_progress, zone, statelink);
zone->statelist = NULL;
zmgr_resume_xfrs(zone->zmgr, false);
RWUNLOCK(&zone->zmgr->rwlock, isc_rwlocktype_write);
LOCK_ZONE(zone);
}
/*
* Retry with a different server if necessary.
*/
if (again && !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING))
queue_soa_query(zone);
INSIST(zone->irefs > 0);
zone->irefs--;
free_needed = exit_check(zone);
UNLOCK_ZONE(zone);
if (free_needed)
zone_free(zone);
}
static void
zone_loaddone(void *arg, isc_result_t result) {
static char me[] = "zone_loaddone";
dns_load_t *load = arg;
dns_zone_t *zone;
isc_result_t tresult;
dns_zone_t *secure = NULL;
REQUIRE(DNS_LOAD_VALID(load));
zone = load->zone;
ENTER;
tresult = dns_db_endload(load->db, &load->callbacks);
if (tresult != ISC_R_SUCCESS &&
(result == ISC_R_SUCCESS || result == DNS_R_SEENINCLUDE))
result = tresult;
/*
* Lock hierarchy: zmgr, zone, raw.
*/
again:
LOCK_ZONE(zone);
INSIST(zone != zone->raw);
if (inline_secure(zone))
LOCK_ZONE(zone->raw);
else if (inline_raw(zone)) {
secure = zone->secure;
TRYLOCK_ZONE(tresult, secure);
if (tresult != ISC_R_SUCCESS) {
UNLOCK_ZONE(zone);
secure = NULL;
#if ISC_PLATFORM_USETHREADS
isc_thread_yield();
#endif
goto again;
}
}
(void)zone_postload(zone, load->db, load->loadtime, result);
zonemgr_putio(&zone->readio);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_LOADING);
zone_idetach(&load->callbacks.zone);
/*
* Leave the zone frozen if the reload fails.
*/
if ((result == ISC_R_SUCCESS || result == DNS_R_SEENINCLUDE) &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_THAW))
zone->update_disabled = false;
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_THAW);
if (inline_secure(zone))
UNLOCK_ZONE(zone->raw);
else if (secure != NULL)
UNLOCK_ZONE(secure);
UNLOCK_ZONE(zone);
load->magic = 0;
dns_db_detach(&load->db);
if (load->zone->lctx != NULL)
dns_loadctx_detach(&load->zone->lctx);
dns_zone_idetach(&load->zone);
isc_mem_putanddetach(&load->mctx, load, sizeof(*load));
}
void
dns_zone_getssutable(dns_zone_t *zone, dns_ssutable_t **table) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(table != NULL);
REQUIRE(*table == NULL);
LOCK_ZONE(zone);
if (zone->ssutable != NULL)
dns_ssutable_attach(zone->ssutable, table);
UNLOCK_ZONE(zone);
}
void
dns_zone_setssutable(dns_zone_t *zone, dns_ssutable_t *table) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->ssutable != NULL)
dns_ssutable_detach(&zone->ssutable);
if (table != NULL)
dns_ssutable_attach(table, &zone->ssutable);
UNLOCK_ZONE(zone);
}
void
dns_zone_setsigvalidityinterval(dns_zone_t *zone, uint32_t interval) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->sigvalidityinterval = interval;
}
uint32_t
dns_zone_getsigvalidityinterval(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->sigvalidityinterval);
}
void
dns_zone_setsigresigninginterval(dns_zone_t *zone, uint32_t interval) {
isc_time_t now;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->sigresigninginterval = interval;
set_resigntime(zone);
if (zone->task != NULL) {
TIME_NOW(&now);
zone_settimer(zone, &now);
}
UNLOCK_ZONE(zone);
}
uint32_t
dns_zone_getsigresigninginterval(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->sigresigninginterval);
}
static void
queue_xfrin(dns_zone_t *zone) {
const char me[] = "queue_xfrin";
isc_result_t result;
dns_zonemgr_t *zmgr = zone->zmgr;
ENTER;
INSIST(zone->statelist == NULL);
RWLOCK(&zmgr->rwlock, isc_rwlocktype_write);
ISC_LIST_APPEND(zmgr->waiting_for_xfrin, zone, statelink);
LOCK_ZONE(zone);
zone->irefs++;
UNLOCK_ZONE(zone);
zone->statelist = &zmgr->waiting_for_xfrin;
result = zmgr_start_xfrin_ifquota(zmgr, zone);
RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_write);
if (result == ISC_R_QUOTA) {
dns_zone_logc(zone, DNS_LOGCATEGORY_XFER_IN, ISC_LOG_INFO,
"zone transfer deferred due to quota");
} else if (result != ISC_R_SUCCESS) {
dns_zone_logc(zone, DNS_LOGCATEGORY_XFER_IN, ISC_LOG_ERROR,
"starting zone transfer: %s",
isc_result_totext(result));
}
}
/*
* This event callback is called when a zone has received
* any necessary zone transfer quota. This is the time
* to go ahead and start the transfer.
*/
static void
got_transfer_quota(isc_task_t *task, isc_event_t *event) {
isc_result_t result = ISC_R_SUCCESS;
dns_peer_t *peer = NULL;
char master[ISC_SOCKADDR_FORMATSIZE];
char source[ISC_SOCKADDR_FORMATSIZE];
dns_rdatatype_t xfrtype;
dns_zone_t *zone = event->ev_arg;
isc_netaddr_t masterip;
isc_sockaddr_t sourceaddr;
isc_sockaddr_t masteraddr;
isc_time_t now;
const char *soa_before = "";
isc_dscp_t dscp = -1;
bool loaded;
UNUSED(task);
INSIST(task == zone->task);
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING)) {
result = ISC_R_CANCELED;
goto cleanup;
}
TIME_NOW(&now);
isc_sockaddr_format(&zone->masteraddr, master, sizeof(master));
if (dns_zonemgr_unreachable(zone->zmgr, &zone->masteraddr,
&zone->sourceaddr, &now))
{
isc_sockaddr_format(&zone->sourceaddr, source, sizeof(source));
dns_zone_log(zone, ISC_LOG_INFO,
"got_transfer_quota: skipping zone transfer as "
"master %s (source %s) is unreachable (cached)",
master, source);
result = ISC_R_CANCELED;
goto cleanup;
}
isc_netaddr_fromsockaddr(&masterip, &zone->masteraddr);
(void)dns_peerlist_peerbyaddr(zone->view->peers, &masterip, &peer);
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_SOABEFOREAXFR))
soa_before = "SOA before ";
/*
* Decide whether we should request IXFR or AXFR.
*/
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
loaded = (zone->db != NULL);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
if (!loaded) {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"no database exists yet, requesting AXFR of "
"initial version from %s", master);
xfrtype = dns_rdatatype_axfr;
} else if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FORCEXFER)) {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"forced reload, requesting AXFR of "
"initial version from %s", master);
xfrtype = dns_rdatatype_axfr;
} else if (DNS_ZONE_FLAG(zone, DNS_ZONEFLAG_NOIXFR)) {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"retrying with AXFR from %s due to "
"previous IXFR failure", master);
xfrtype = dns_rdatatype_axfr;
LOCK_ZONE(zone);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLAG_NOIXFR);
UNLOCK_ZONE(zone);
} else {
bool use_ixfr = true;
if (peer != NULL)
result = dns_peer_getrequestixfr(peer, &use_ixfr);
if (peer == NULL || result != ISC_R_SUCCESS)
use_ixfr = zone->requestixfr;
if (use_ixfr == false) {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"IXFR disabled, requesting %sAXFR from %s",
soa_before, master);
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_SOABEFOREAXFR))
xfrtype = dns_rdatatype_soa;
else
xfrtype = dns_rdatatype_axfr;
} else {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"requesting IXFR from %s", master);
xfrtype = dns_rdatatype_ixfr;
}
}
/*
* Determine if we should attempt to sign the request with TSIG.
*/
result = ISC_R_NOTFOUND;
/*
* First, look for a tsig key in the master statement, then
* try for a server key.
*/
if ((zone->masterkeynames != NULL) &&
(zone->masterkeynames[zone->curmaster] != NULL)) {
dns_view_t *view = dns_zone_getview(zone);
dns_name_t *keyname = zone->masterkeynames[zone->curmaster];
result = dns_view_gettsig(view, keyname, &zone->tsigkey);
}
if (zone->tsigkey == NULL)
result = dns_view_getpeertsig(zone->view, &masterip,
&zone->tsigkey);
if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND) {
dns_zone_log(zone, ISC_LOG_ERROR,
"could not get TSIG key for zone transfer: %s",
isc_result_totext(result));
}
if (zone->masterdscps != NULL)
dscp = zone->masterdscps[zone->curmaster];
LOCK_ZONE(zone);
masteraddr = zone->masteraddr;
sourceaddr = zone->sourceaddr;
switch (isc_sockaddr_pf(&masteraddr)) {
case PF_INET:
if (dscp == -1)
dscp = zone->xfrsource4dscp;
break;
case PF_INET6:
if (dscp == -1)
dscp = zone->xfrsource6dscp;
break;
default:
INSIST(0);
ISC_UNREACHABLE();
}
UNLOCK_ZONE(zone);
INSIST(isc_sockaddr_pf(&masteraddr) == isc_sockaddr_pf(&sourceaddr));
result = dns_xfrin_create3(zone, xfrtype, &masteraddr, &sourceaddr,
dscp, zone->tsigkey, zone->mctx,
zone->zmgr->timermgr, zone->zmgr->socketmgr,
zone->task, zone_xfrdone, &zone->xfr);
if (result == ISC_R_SUCCESS) {
LOCK_ZONE(zone);
if (xfrtype == dns_rdatatype_axfr) {
if (isc_sockaddr_pf(&masteraddr) == PF_INET)
inc_stats(zone, dns_zonestatscounter_axfrreqv4);
else
inc_stats(zone, dns_zonestatscounter_axfrreqv6);
} else if (xfrtype == dns_rdatatype_ixfr) {
if (isc_sockaddr_pf(&masteraddr) == PF_INET)
inc_stats(zone, dns_zonestatscounter_ixfrreqv4);
else
inc_stats(zone, dns_zonestatscounter_ixfrreqv6);
}
UNLOCK_ZONE(zone);
}
cleanup:
/*
* Any failure in this function is handled like a failed
* zone transfer. This ensures that we get removed from
* zmgr->xfrin_in_progress.
*/
if (result != ISC_R_SUCCESS)
zone_xfrdone(zone, result);
isc_event_free(&event);
}
/*
* Update forwarding support.
*/
static void
forward_destroy(dns_forward_t *forward) {
forward->magic = 0;
if (forward->request != NULL)
dns_request_destroy(&forward->request);
if (forward->msgbuf != NULL)
isc_buffer_free(&forward->msgbuf);
if (forward->zone != NULL) {
LOCK(&forward->zone->lock);
if (ISC_LINK_LINKED(forward, link))
ISC_LIST_UNLINK(forward->zone->forwards, forward, link);
UNLOCK(&forward->zone->lock);
dns_zone_idetach(&forward->zone);
}
isc_mem_putanddetach(&forward->mctx, forward, sizeof(*forward));
}
static isc_result_t
sendtomaster(dns_forward_t *forward) {
isc_result_t result;
isc_sockaddr_t src;
isc_dscp_t dscp = -1;
LOCK_ZONE(forward->zone);
if (DNS_ZONE_FLAG(forward->zone, DNS_ZONEFLG_EXITING)) {
UNLOCK_ZONE(forward->zone);
return (ISC_R_CANCELED);
}
if (forward->which >= forward->zone->masterscnt) {
UNLOCK_ZONE(forward->zone);
return (ISC_R_NOMORE);
}
forward->addr = forward->zone->masters[forward->which];
/*
* Always use TCP regardless of whether the original update
* used TCP.
* XXX The timeout may but a bit small if we are far down a
* transfer graph and the master has to try several masters.
*/
switch (isc_sockaddr_pf(&forward->addr)) {
case PF_INET:
src = forward->zone->xfrsource4;
dscp = forward->zone->xfrsource4dscp;
break;
case PF_INET6:
src = forward->zone->xfrsource6;
dscp = forward->zone->xfrsource6dscp;
break;
default:
result = ISC_R_NOTIMPLEMENTED;
goto unlock;
}
result = dns_request_createraw4(forward->zone->view->requestmgr,
forward->msgbuf,
&src, &forward->addr, dscp,
forward->options, 15 /* XXX */,
0, 0, forward->zone->task,
forward_callback, forward,
&forward->request);
if (result == ISC_R_SUCCESS) {
if (!ISC_LINK_LINKED(forward, link))
ISC_LIST_APPEND(forward->zone->forwards, forward, link);
}
unlock:
UNLOCK_ZONE(forward->zone);
return (result);
}
static void
forward_callback(isc_task_t *task, isc_event_t *event) {
const char me[] = "forward_callback";
dns_requestevent_t *revent = (dns_requestevent_t *)event;
dns_message_t *msg = NULL;
char master[ISC_SOCKADDR_FORMATSIZE];
isc_result_t result;
dns_forward_t *forward;
dns_zone_t *zone;
UNUSED(task);
forward = revent->ev_arg;
INSIST(DNS_FORWARD_VALID(forward));
zone = forward->zone;
INSIST(DNS_ZONE_VALID(zone));
ENTER;
isc_sockaddr_format(&forward->addr, master, sizeof(master));
if (revent->result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_INFO,
"could not forward dynamic update to %s: %s",
master, dns_result_totext(revent->result));
goto next_master;
}
result = dns_message_create(zone->mctx, DNS_MESSAGE_INTENTPARSE, &msg);
if (result != ISC_R_SUCCESS)
goto next_master;
result = dns_request_getresponse(revent->request, msg,
DNS_MESSAGEPARSE_PRESERVEORDER |
DNS_MESSAGEPARSE_CLONEBUFFER);
if (result != ISC_R_SUCCESS)
goto next_master;
switch (msg->rcode) {
/*
* Pass these rcodes back to client.
*/
case dns_rcode_noerror:
case dns_rcode_yxdomain:
case dns_rcode_yxrrset:
case dns_rcode_nxrrset:
case dns_rcode_refused:
case dns_rcode_nxdomain: {
char rcode[128];
isc_buffer_t rb;
isc_buffer_init(&rb, rcode, sizeof(rcode));
(void)dns_rcode_totext(msg->rcode, &rb);
dns_zone_log(zone, ISC_LOG_INFO,
"forwarded dynamic update: "
"master %s returned: %.*s",
master, (int)rb.used, rcode);
break;
}
/* These should not occur if the masters/zone are valid. */
case dns_rcode_notzone:
case dns_rcode_notauth: {
char rcode[128];
isc_buffer_t rb;
isc_buffer_init(&rb, rcode, sizeof(rcode));
(void)dns_rcode_totext(msg->rcode, &rb);
dns_zone_log(zone, ISC_LOG_WARNING,
"forwarding dynamic update: "
"unexpected response: master %s returned: %.*s",
master, (int)rb.used, rcode);
goto next_master;
}
/* Try another server for these rcodes. */
case dns_rcode_formerr:
case dns_rcode_servfail:
case dns_rcode_notimp:
case dns_rcode_badvers:
default:
goto next_master;
}
/* call callback */
(forward->callback)(forward->callback_arg, ISC_R_SUCCESS, msg);
msg = NULL;
dns_request_destroy(&forward->request);
forward_destroy(forward);
isc_event_free(&event);
return;
next_master:
if (msg != NULL)
dns_message_destroy(&msg);
isc_event_free(&event);
forward->which++;
dns_request_destroy(&forward->request);
result = sendtomaster(forward);
if (result != ISC_R_SUCCESS) {
/* call callback */
dns_zone_log(zone, ISC_LOG_DEBUG(3),
"exhausted dynamic update forwarder list");
(forward->callback)(forward->callback_arg, result, NULL);
forward_destroy(forward);
}
}
isc_result_t
dns_zone_forwardupdate(dns_zone_t *zone, dns_message_t *msg,
dns_updatecallback_t callback, void *callback_arg)
{
dns_forward_t *forward;
isc_result_t result;
isc_region_t *mr;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(msg != NULL);
REQUIRE(callback != NULL);
forward = isc_mem_get(zone->mctx, sizeof(*forward));
if (forward == NULL)
return (ISC_R_NOMEMORY);
forward->request = NULL;
forward->zone = NULL;
forward->msgbuf = NULL;
forward->which = 0;
forward->mctx = 0;
forward->callback = callback;
forward->callback_arg = callback_arg;
ISC_LINK_INIT(forward, link);
forward->magic = FORWARD_MAGIC;
forward->options = DNS_REQUESTOPT_TCP;
/*
* If we have a SIG(0) signed message we need to preserve the
* query id as that is included in the SIG(0) computation.
*/
if (msg->sig0 != NULL)
forward->options |= DNS_REQUESTOPT_FIXEDID;
mr = dns_message_getrawmessage(msg);
if (mr == NULL) {
result = ISC_R_UNEXPECTEDEND;
goto cleanup;
}
result = isc_buffer_allocate(zone->mctx, &forward->msgbuf, mr->length);
if (result != ISC_R_SUCCESS)
goto cleanup;
result = isc_buffer_copyregion(forward->msgbuf, mr);
if (result != ISC_R_SUCCESS)
goto cleanup;
isc_mem_attach(zone->mctx, &forward->mctx);
dns_zone_iattach(zone, &forward->zone);
result = sendtomaster(forward);
cleanup:
if (result != ISC_R_SUCCESS) {
forward_destroy(forward);
}
return (result);
}
isc_result_t
dns_zone_next(dns_zone_t *zone, dns_zone_t **next) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(next != NULL && *next == NULL);
*next = ISC_LIST_NEXT(zone, link);
if (*next == NULL)
return (ISC_R_NOMORE);
else
return (ISC_R_SUCCESS);
}
isc_result_t
dns_zone_first(dns_zonemgr_t *zmgr, dns_zone_t **first) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
REQUIRE(first != NULL && *first == NULL);
*first = ISC_LIST_HEAD(zmgr->zones);
if (*first == NULL)
return (ISC_R_NOMORE);
else
return (ISC_R_SUCCESS);
}
/***
*** Zone manager.
***/
isc_result_t
dns_zonemgr_create(isc_mem_t *mctx, isc_taskmgr_t *taskmgr,
isc_timermgr_t *timermgr, isc_socketmgr_t *socketmgr,
dns_zonemgr_t **zmgrp)
{
dns_zonemgr_t *zmgr;
isc_result_t result;
zmgr = isc_mem_get(mctx, sizeof(*zmgr));
if (zmgr == NULL)
return (ISC_R_NOMEMORY);
zmgr->mctx = NULL;
zmgr->refs = 1;
isc_mem_attach(mctx, &zmgr->mctx);
zmgr->taskmgr = taskmgr;
zmgr->timermgr = timermgr;
zmgr->socketmgr = socketmgr;
zmgr->zonetasks = NULL;
zmgr->loadtasks = NULL;
zmgr->mctxpool = NULL;
zmgr->task = NULL;
zmgr->notifyrl = NULL;
zmgr->refreshrl = NULL;
zmgr->startupnotifyrl = NULL;
zmgr->startuprefreshrl = NULL;
ISC_LIST_INIT(zmgr->zones);
ISC_LIST_INIT(zmgr->waiting_for_xfrin);
ISC_LIST_INIT(zmgr->xfrin_in_progress);
memset(zmgr->unreachable, 0, sizeof(zmgr->unreachable));
result = isc_rwlock_init(&zmgr->rwlock, 0, 0);
if (result != ISC_R_SUCCESS)
goto free_mem;
zmgr->transfersin = 10;
zmgr->transfersperns = 2;
/* Unreachable lock. */
result = isc_rwlock_init(&zmgr->urlock, 0, 0);
if (result != ISC_R_SUCCESS)
goto free_rwlock;
/* Create a single task for queueing of SOA queries. */
result = isc_task_create(taskmgr, 1, &zmgr->task);
if (result != ISC_R_SUCCESS)
goto free_urlock;
isc_task_setname(zmgr->task, "zmgr", zmgr);
result = isc_ratelimiter_create(mctx, timermgr, zmgr->task,
&zmgr->notifyrl);
if (result != ISC_R_SUCCESS)
goto free_task;
result = isc_ratelimiter_create(mctx, timermgr, zmgr->task,
&zmgr->refreshrl);
if (result != ISC_R_SUCCESS)
goto free_notifyrl;
result = isc_ratelimiter_create(mctx, timermgr, zmgr->task,
&zmgr->startupnotifyrl);
if (result != ISC_R_SUCCESS)
goto free_refreshrl;
result = isc_ratelimiter_create(mctx, timermgr, zmgr->task,
&zmgr->startuprefreshrl);
if (result != ISC_R_SUCCESS)
goto free_startupnotifyrl;
/* default to 20 refresh queries / notifies per second. */
setrl(zmgr->notifyrl, &zmgr->notifyrate, 20);
setrl(zmgr->startupnotifyrl, &zmgr->startupnotifyrate, 20);
setrl(zmgr->refreshrl, &zmgr->serialqueryrate, 20);
setrl(zmgr->startuprefreshrl, &zmgr->startupserialqueryrate, 20);
isc_ratelimiter_setpushpop(zmgr->startupnotifyrl, true);
isc_ratelimiter_setpushpop(zmgr->startuprefreshrl, true);
zmgr->iolimit = 1;
zmgr->ioactive = 0;
ISC_LIST_INIT(zmgr->high);
ISC_LIST_INIT(zmgr->low);
result = isc_mutex_init(&zmgr->iolock);
if (result != ISC_R_SUCCESS)
goto free_startuprefreshrl;
zmgr->magic = ZONEMGR_MAGIC;
*zmgrp = zmgr;
return (ISC_R_SUCCESS);
#if 0
free_iolock:
DESTROYLOCK(&zmgr->iolock);
#endif
free_startuprefreshrl:
isc_ratelimiter_detach(&zmgr->startuprefreshrl);
free_startupnotifyrl:
isc_ratelimiter_detach(&zmgr->startupnotifyrl);
free_refreshrl:
isc_ratelimiter_detach(&zmgr->refreshrl);
free_notifyrl:
isc_ratelimiter_detach(&zmgr->notifyrl);
free_task:
isc_task_detach(&zmgr->task);
free_urlock:
isc_rwlock_destroy(&zmgr->urlock);
free_rwlock:
isc_rwlock_destroy(&zmgr->rwlock);
free_mem:
isc_mem_put(zmgr->mctx, zmgr, sizeof(*zmgr));
isc_mem_detach(&mctx);
return (result);
}
isc_result_t
dns_zonemgr_createzone(dns_zonemgr_t *zmgr, dns_zone_t **zonep) {
isc_result_t result;
isc_mem_t *mctx = NULL;
dns_zone_t *zone = NULL;
void *item;
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
REQUIRE(zonep != NULL && *zonep == NULL);
if (zmgr->mctxpool == NULL)
return (ISC_R_FAILURE);
item = isc_pool_get(zmgr->mctxpool);
if (item == NULL)
return (ISC_R_FAILURE);
isc_mem_attach((isc_mem_t *) item, &mctx);
result = dns_zone_create(&zone, mctx);
isc_mem_detach(&mctx);
if (result == ISC_R_SUCCESS)
*zonep = zone;
return (result);
}
isc_result_t
dns_zonemgr_managezone(dns_zonemgr_t *zmgr, dns_zone_t *zone) {
isc_result_t result;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
if (zmgr->zonetasks == NULL)
return (ISC_R_FAILURE);
RWLOCK(&zmgr->rwlock, isc_rwlocktype_write);
LOCK_ZONE(zone);
REQUIRE(zone->task == NULL);
REQUIRE(zone->timer == NULL);
REQUIRE(zone->zmgr == NULL);
isc_taskpool_gettask(zmgr->zonetasks, &zone->task);
isc_taskpool_gettask(zmgr->loadtasks, &zone->loadtask);
/*
* Set the task name. The tag will arbitrarily point to one
* of the zones sharing the task (in practice, the one
* to be managed last).
*/
isc_task_setname(zone->task, "zone", zone);
isc_task_setname(zone->loadtask, "loadzone", zone);
result = isc_timer_create(zmgr->timermgr, isc_timertype_inactive,
NULL, NULL,
zone->task, zone_timer, zone,
&zone->timer);
if (result != ISC_R_SUCCESS)
goto cleanup_tasks;
/*
* The timer "holds" a iref.
*/
zone->irefs++;
INSIST(zone->irefs != 0);
ISC_LIST_APPEND(zmgr->zones, zone, link);
zone->zmgr = zmgr;
zmgr->refs++;
goto unlock;
cleanup_tasks:
isc_task_detach(&zone->loadtask);
isc_task_detach(&zone->task);
unlock:
UNLOCK_ZONE(zone);
RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_write);
return (result);
}
void
dns_zonemgr_releasezone(dns_zonemgr_t *zmgr, dns_zone_t *zone) {
bool free_now = false;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
REQUIRE(zone->zmgr == zmgr);
RWLOCK(&zmgr->rwlock, isc_rwlocktype_write);
LOCK_ZONE(zone);
ISC_LIST_UNLINK(zmgr->zones, zone, link);
zone->zmgr = NULL;
zmgr->refs--;
if (zmgr->refs == 0)
free_now = true;
UNLOCK_ZONE(zone);
RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_write);
if (free_now)
zonemgr_free(zmgr);
ENSURE(zone->zmgr == NULL);
}
void
dns_zonemgr_attach(dns_zonemgr_t *source, dns_zonemgr_t **target) {
REQUIRE(DNS_ZONEMGR_VALID(source));
REQUIRE(target != NULL && *target == NULL);
RWLOCK(&source->rwlock, isc_rwlocktype_write);
REQUIRE(source->refs > 0);
source->refs++;
INSIST(source->refs > 0);
RWUNLOCK(&source->rwlock, isc_rwlocktype_write);
*target = source;
}
void
dns_zonemgr_detach(dns_zonemgr_t **zmgrp) {
dns_zonemgr_t *zmgr;
bool free_now = false;
REQUIRE(zmgrp != NULL);
zmgr = *zmgrp;
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
RWLOCK(&zmgr->rwlock, isc_rwlocktype_write);
zmgr->refs--;
if (zmgr->refs == 0)
free_now = true;
RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_write);
if (free_now)
zonemgr_free(zmgr);
*zmgrp = NULL;
}
isc_result_t
dns_zonemgr_forcemaint(dns_zonemgr_t *zmgr) {
dns_zone_t *p;
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
RWLOCK(&zmgr->rwlock, isc_rwlocktype_read);
for (p = ISC_LIST_HEAD(zmgr->zones);
p != NULL;
p = ISC_LIST_NEXT(p, link))
{
dns_zone_maintenance(p);
}
RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_read);
/*
* Recent configuration changes may have increased the
* amount of available transfers quota. Make sure any
* transfers currently blocked on quota get started if
* possible.
*/
RWLOCK(&zmgr->rwlock, isc_rwlocktype_write);
zmgr_resume_xfrs(zmgr, true);
RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_write);
return (ISC_R_SUCCESS);
}
void
dns_zonemgr_resumexfrs(dns_zonemgr_t *zmgr) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
RWLOCK(&zmgr->rwlock, isc_rwlocktype_write);
zmgr_resume_xfrs(zmgr, true);
RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_write);
}
void
dns_zonemgr_shutdown(dns_zonemgr_t *zmgr) {
dns_zone_t *zone;
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
isc_ratelimiter_shutdown(zmgr->notifyrl);
isc_ratelimiter_shutdown(zmgr->refreshrl);
isc_ratelimiter_shutdown(zmgr->startupnotifyrl);
isc_ratelimiter_shutdown(zmgr->startuprefreshrl);
if (zmgr->task != NULL)
isc_task_destroy(&zmgr->task);
if (zmgr->zonetasks != NULL)
isc_taskpool_destroy(&zmgr->zonetasks);
if (zmgr->loadtasks != NULL)
isc_taskpool_destroy(&zmgr->loadtasks);
if (zmgr->mctxpool != NULL)
isc_pool_destroy(&zmgr->mctxpool);
RWLOCK(&zmgr->rwlock, isc_rwlocktype_read);
for (zone = ISC_LIST_HEAD(zmgr->zones);
zone != NULL;
zone = ISC_LIST_NEXT(zone, link))
{
LOCK_ZONE(zone);
forward_cancel(zone);
UNLOCK_ZONE(zone);
}
RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_read);
}
static isc_result_t
mctxinit(void **target, void *arg) {
isc_result_t result;
isc_mem_t *mctx = NULL;
UNUSED(arg);
REQUIRE(target != NULL && *target == NULL);
result = isc_mem_create(0, 0, &mctx);
if (result != ISC_R_SUCCESS)
return (result);
isc_mem_setname(mctx, "zonemgr-pool", NULL);
*target = mctx;
return (ISC_R_SUCCESS);
}
static void
mctxfree(void **target) {
isc_mem_t *mctx = *(isc_mem_t **) target;
isc_mem_detach(&mctx);
*target = NULL;
}
#define ZONES_PER_TASK 100
#define ZONES_PER_MCTX 1000
isc_result_t
dns_zonemgr_setsize(dns_zonemgr_t *zmgr, int num_zones) {
isc_result_t result;
int ntasks = num_zones / ZONES_PER_TASK;
int nmctx = num_zones / ZONES_PER_MCTX;
isc_taskpool_t *pool = NULL;
isc_pool_t *mctxpool = NULL;
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
/*
* For anything fewer than 1000 zones we use 10 tasks in
* the task pools. More than that, and we'll scale at one
* task per 100 zones. Similarly, for anything smaller than
* 2000 zones we use 2 memory contexts, then scale at 1:1000.
*/
if (ntasks < 10)
ntasks = 10;
if (nmctx < 2)
nmctx = 2;
/* Create or resize the zone task pools. */
if (zmgr->zonetasks == NULL)
result = isc_taskpool_create(zmgr->taskmgr, zmgr->mctx,
ntasks, 2, &pool);
else
result = isc_taskpool_expand(&zmgr->zonetasks, ntasks, &pool);
if (result == ISC_R_SUCCESS)
zmgr->zonetasks = pool;
pool = NULL;
if (zmgr->loadtasks == NULL)
result = isc_taskpool_create(zmgr->taskmgr, zmgr->mctx,
ntasks, 2, &pool);
else
result = isc_taskpool_expand(&zmgr->loadtasks, ntasks, &pool);
if (result == ISC_R_SUCCESS)
zmgr->loadtasks = pool;
/*
* We always set all tasks in the zone-load task pool to
* privileged. This prevents other tasks in the system from
* running while the server task manager is in privileged
* mode.
*
* NOTE: If we start using task privileges for any other
* part of the system than zone tasks, then this will need to be
* revisted. In that case we'd want to turn on privileges for
* zone tasks only when we were loading, and turn them off the
* rest of the time. For now, however, it's okay to just
* set it and forget it.
*/
isc_taskpool_setprivilege(zmgr->loadtasks, true);
/* Create or resize the zone memory context pool. */
if (zmgr->mctxpool == NULL)
result = isc_pool_create(zmgr->mctx, nmctx, mctxfree,
mctxinit, NULL, &mctxpool);
else
result = isc_pool_expand(&zmgr->mctxpool, nmctx, &mctxpool);
if (result == ISC_R_SUCCESS)
zmgr->mctxpool = mctxpool;
return (result);
}
static void
zonemgr_free(dns_zonemgr_t *zmgr) {
isc_mem_t *mctx;
INSIST(zmgr->refs == 0);
INSIST(ISC_LIST_EMPTY(zmgr->zones));
zmgr->magic = 0;
DESTROYLOCK(&zmgr->iolock);
isc_ratelimiter_detach(&zmgr->notifyrl);
isc_ratelimiter_detach(&zmgr->refreshrl);
isc_ratelimiter_detach(&zmgr->startupnotifyrl);
isc_ratelimiter_detach(&zmgr->startuprefreshrl);
isc_rwlock_destroy(&zmgr->urlock);
isc_rwlock_destroy(&zmgr->rwlock);
mctx = zmgr->mctx;
isc_mem_put(zmgr->mctx, zmgr, sizeof(*zmgr));
isc_mem_detach(&mctx);
}
void
dns_zonemgr_settransfersin(dns_zonemgr_t *zmgr, uint32_t value) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
zmgr->transfersin = value;
}
uint32_t
dns_zonemgr_getttransfersin(dns_zonemgr_t *zmgr) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
return (zmgr->transfersin);
}
void
dns_zonemgr_settransfersperns(dns_zonemgr_t *zmgr, uint32_t value) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
zmgr->transfersperns = value;
}
uint32_t
dns_zonemgr_getttransfersperns(dns_zonemgr_t *zmgr) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
return (zmgr->transfersperns);
}
/*
* Try to start a new incoming zone transfer to fill a quota
* slot that was just vacated.
*
* Requires:
* The zone manager is locked by the caller.
*/
static void
zmgr_resume_xfrs(dns_zonemgr_t *zmgr, bool multi) {
dns_zone_t *zone;
dns_zone_t *next;
for (zone = ISC_LIST_HEAD(zmgr->waiting_for_xfrin);
zone != NULL;
zone = next)
{
isc_result_t result;
next = ISC_LIST_NEXT(zone, statelink);
result = zmgr_start_xfrin_ifquota(zmgr, zone);
if (result == ISC_R_SUCCESS) {
if (multi)
continue;
/*
* We successfully filled the slot. We're done.
*/
break;
} else if (result == ISC_R_QUOTA) {
/*
* Not enough quota. This is probably the per-server
* quota, because we usually get called when a unit of
* global quota has just been freed. Try the next
* zone, it may succeed if it uses another master.
*/
continue;
} else {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"starting zone transfer: %s",
isc_result_totext(result));
break;
}
}
}
/*
* Try to start an incoming zone transfer for 'zone', quota permitting.
*
* Requires:
* The zone manager is locked by the caller.
*
* Returns:
* ISC_R_SUCCESS There was enough quota and we attempted to
* start a transfer. zone_xfrdone() has been or will
* be called.
* ISC_R_QUOTA Not enough quota.
* Others Failure.
*/
static isc_result_t
zmgr_start_xfrin_ifquota(dns_zonemgr_t *zmgr, dns_zone_t *zone) {
dns_peer_t *peer = NULL;
isc_netaddr_t masterip;
uint32_t nxfrsin, nxfrsperns;
dns_zone_t *x;
uint32_t maxtransfersin, maxtransfersperns;
isc_event_t *e;
/*
* If we are exiting just pretend we got quota so the zone will
* be cleaned up in the zone's task context.
*/
LOCK_ZONE(zone);
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING)) {
UNLOCK_ZONE(zone);
goto gotquota;
}
/*
* Find any configured information about the server we'd
* like to transfer this zone from.
*/
isc_netaddr_fromsockaddr(&masterip, &zone->masteraddr);
(void)dns_peerlist_peerbyaddr(zone->view->peers, &masterip, &peer);
UNLOCK_ZONE(zone);
/*
* Determine the total maximum number of simultaneous
* transfers allowed, and the maximum for this specific
* master.
*/
maxtransfersin = zmgr->transfersin;
maxtransfersperns = zmgr->transfersperns;
if (peer != NULL)
(void)dns_peer_gettransfers(peer, &maxtransfersperns);
/*
* Count the total number of transfers that are in progress,
* and the number of transfers in progress from this master.
* We linearly scan a list of all transfers; if this turns
* out to be too slow, we could hash on the master address.
*/
nxfrsin = nxfrsperns = 0;
for (x = ISC_LIST_HEAD(zmgr->xfrin_in_progress);
x != NULL;
x = ISC_LIST_NEXT(x, statelink))
{
isc_netaddr_t xip;
LOCK_ZONE(x);
isc_netaddr_fromsockaddr(&xip, &x->masteraddr);
UNLOCK_ZONE(x);
nxfrsin++;
if (isc_netaddr_equal(&xip, &masterip))
nxfrsperns++;
}
/* Enforce quota. */
if (nxfrsin >= maxtransfersin)
return (ISC_R_QUOTA);
if (nxfrsperns >= maxtransfersperns)
return (ISC_R_QUOTA);
gotquota:
/*
* We have sufficient quota. Move the zone to the "xfrin_in_progress"
* list and send it an event to let it start the actual transfer in the
* context of its own task.
*/
e = isc_event_allocate(zmgr->mctx, zmgr, DNS_EVENT_ZONESTARTXFRIN,
got_transfer_quota, zone, sizeof(isc_event_t));
if (e == NULL)
return (ISC_R_NOMEMORY);
LOCK_ZONE(zone);
INSIST(zone->statelist == &zmgr->waiting_for_xfrin);
ISC_LIST_UNLINK(zmgr->waiting_for_xfrin, zone, statelink);
ISC_LIST_APPEND(zmgr->xfrin_in_progress, zone, statelink);
zone->statelist = &zmgr->xfrin_in_progress;
isc_task_send(zone->task, &e);
dns_zone_log(zone, ISC_LOG_INFO, "Transfer started.");
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
void
dns_zonemgr_setiolimit(dns_zonemgr_t *zmgr, uint32_t iolimit) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
REQUIRE(iolimit > 0);
zmgr->iolimit = iolimit;
}
uint32_t
dns_zonemgr_getiolimit(dns_zonemgr_t *zmgr) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
return (zmgr->iolimit);
}
/*
* Get permission to request a file handle from the OS.
* An event will be sent to action when one is available.
* There are two queues available (high and low), the high
* queue will be serviced before the low one.
*
* zonemgr_putio() must be called after the event is delivered to
* 'action'.
*/
static isc_result_t
zonemgr_getio(dns_zonemgr_t *zmgr, bool high,
isc_task_t *task, isc_taskaction_t action, void *arg,
dns_io_t **iop)
{
dns_io_t *io;
bool queue;
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
REQUIRE(iop != NULL && *iop == NULL);
io = isc_mem_get(zmgr->mctx, sizeof(*io));
if (io == NULL)
return (ISC_R_NOMEMORY);
io->event = isc_event_allocate(zmgr->mctx, task, DNS_EVENT_IOREADY,
action, arg, sizeof(*io->event));
if (io->event == NULL) {
isc_mem_put(zmgr->mctx, io, sizeof(*io));
return (ISC_R_NOMEMORY);
}
io->zmgr = zmgr;
io->high = high;
io->task = NULL;
isc_task_attach(task, &io->task);
ISC_LINK_INIT(io, link);
io->magic = IO_MAGIC;
LOCK(&zmgr->iolock);
zmgr->ioactive++;
queue = (zmgr->ioactive > zmgr->iolimit);
if (queue) {
if (io->high)
ISC_LIST_APPEND(zmgr->high, io, link);
else
ISC_LIST_APPEND(zmgr->low, io, link);
}
UNLOCK(&zmgr->iolock);
*iop = io;
if (!queue)
isc_task_send(io->task, &io->event);
return (ISC_R_SUCCESS);
}
static void
zonemgr_putio(dns_io_t **iop) {
dns_io_t *io;
dns_io_t *next;
dns_zonemgr_t *zmgr;
REQUIRE(iop != NULL);
io = *iop;
REQUIRE(DNS_IO_VALID(io));
*iop = NULL;
INSIST(!ISC_LINK_LINKED(io, link));
INSIST(io->event == NULL);
zmgr = io->zmgr;
isc_task_detach(&io->task);
io->magic = 0;
isc_mem_put(zmgr->mctx, io, sizeof(*io));
LOCK(&zmgr->iolock);
INSIST(zmgr->ioactive > 0);
zmgr->ioactive--;
next = HEAD(zmgr->high);
if (next == NULL)
next = HEAD(zmgr->low);
if (next != NULL) {
if (next->high)
ISC_LIST_UNLINK(zmgr->high, next, link);
else
ISC_LIST_UNLINK(zmgr->low, next, link);
INSIST(next->event != NULL);
}
UNLOCK(&zmgr->iolock);
if (next != NULL)
isc_task_send(next->task, &next->event);
}
static void
zonemgr_cancelio(dns_io_t *io) {
bool send_event = false;
REQUIRE(DNS_IO_VALID(io));
/*
* If we are queued to be run then dequeue.
*/
LOCK(&io->zmgr->iolock);
if (ISC_LINK_LINKED(io, link)) {
if (io->high)
ISC_LIST_UNLINK(io->zmgr->high, io, link);
else
ISC_LIST_UNLINK(io->zmgr->low, io, link);
send_event = true;
INSIST(io->event != NULL);
}
UNLOCK(&io->zmgr->iolock);
if (send_event) {
io->event->ev_attributes |= ISC_EVENTATTR_CANCELED;
isc_task_send(io->task, &io->event);
}
}
static void
zone_saveunique(dns_zone_t *zone, const char *path, const char *templat) {
char *buf;
int buflen;
isc_result_t result;
buflen = strlen(path) + strlen(templat) + 2;
buf = isc_mem_get(zone->mctx, buflen);
if (buf == NULL)
return;
result = isc_file_template(path, templat, buf, buflen);
if (result != ISC_R_SUCCESS)
goto cleanup;
result = isc_file_renameunique(path, buf);
if (result != ISC_R_SUCCESS)
goto cleanup;
dns_zone_log(zone, ISC_LOG_WARNING, "unable to load from '%s'; "
"renaming file to '%s' for failure analysis and "
"retransferring.", path, buf);
cleanup:
isc_mem_put(zone->mctx, buf, buflen);
}
#if 0
/* Hook for ondestroy notification from a database. */
static void
dns_zonemgr_dbdestroyed(isc_task_t *task, isc_event_t *event) {
dns_db_t *db = event->sender;
UNUSED(task);
isc_event_free(&event);
isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
DNS_LOGMODULE_ZONE, ISC_LOG_DEBUG(3),
"database (%p) destroyed", (void*) db);
}
#endif
static void
setrl(isc_ratelimiter_t *rl, unsigned int *rate, unsigned int value) {
isc_interval_t interval;
uint32_t s, ns;
uint32_t pertic;
isc_result_t result;
if (value == 0)
value = 1;
if (value == 1) {
s = 1;
ns = 0;
pertic = 1;
} else if (value <= 10) {
s = 0;
ns = 1000000000 / value;
pertic = 1;
} else {
s = 0;
ns = (1000000000 / value) * 10;
pertic = 10;
}
isc_interval_set(&interval, s, ns);
result = isc_ratelimiter_setinterval(rl, &interval);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
isc_ratelimiter_setpertic(rl, pertic);
*rate = value;
}
void
dns_zonemgr_setnotifyrate(dns_zonemgr_t *zmgr, unsigned int value) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
setrl(zmgr->notifyrl, &zmgr->notifyrate, value);
}
void
dns_zonemgr_setstartupnotifyrate(dns_zonemgr_t *zmgr, unsigned int value) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
setrl(zmgr->startupnotifyrl, &zmgr->startupnotifyrate, value);
}
void
dns_zonemgr_setserialqueryrate(dns_zonemgr_t *zmgr, unsigned int value) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
setrl(zmgr->refreshrl, &zmgr->serialqueryrate, value);
/* XXXMPA separate out once we have the code to support this. */
setrl(zmgr->startuprefreshrl, &zmgr->startupserialqueryrate, value);
}
unsigned int
dns_zonemgr_getnotifyrate(dns_zonemgr_t *zmgr) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
return (zmgr->notifyrate);
}
unsigned int
dns_zonemgr_getstartupnotifyrate(dns_zonemgr_t *zmgr) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
return (zmgr->startupnotifyrate);
}
unsigned int
dns_zonemgr_getserialqueryrate(dns_zonemgr_t *zmgr) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
return (zmgr->serialqueryrate);
}
bool
dns_zonemgr_unreachable(dns_zonemgr_t *zmgr, isc_sockaddr_t *remote,
isc_sockaddr_t *local, isc_time_t *now)
{
unsigned int i;
isc_rwlocktype_t locktype;
isc_result_t result;
uint32_t seconds = isc_time_seconds(now);
uint32_t count = 0;
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
locktype = isc_rwlocktype_read;
RWLOCK(&zmgr->urlock, locktype);
for (i = 0; i < UNREACH_CHACHE_SIZE; i++) {
if (zmgr->unreachable[i].expire >= seconds &&
isc_sockaddr_equal(&zmgr->unreachable[i].remote, remote) &&
isc_sockaddr_equal(&zmgr->unreachable[i].local, local)) {
result = isc_rwlock_tryupgrade(&zmgr->urlock);
if (result == ISC_R_SUCCESS) {
locktype = isc_rwlocktype_write;
zmgr->unreachable[i].last = seconds;
count = zmgr->unreachable[i].count;
}
break;
}
}
RWUNLOCK(&zmgr->urlock, locktype);
return (i < UNREACH_CHACHE_SIZE && count > 1U);
}
void
dns_zonemgr_unreachabledel(dns_zonemgr_t *zmgr, isc_sockaddr_t *remote,
isc_sockaddr_t *local)
{
unsigned int i;
isc_rwlocktype_t locktype;
isc_result_t result;
char master[ISC_SOCKADDR_FORMATSIZE];
char source[ISC_SOCKADDR_FORMATSIZE];
isc_sockaddr_format(remote, master, sizeof(master));
isc_sockaddr_format(local, source, sizeof(source));
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
locktype = isc_rwlocktype_read;
RWLOCK(&zmgr->urlock, locktype);
for (i = 0; i < UNREACH_CHACHE_SIZE; i++) {
if (isc_sockaddr_equal(&zmgr->unreachable[i].remote, remote) &&
isc_sockaddr_equal(&zmgr->unreachable[i].local, local)) {
if (zmgr->unreachable[i].expire == 0)
break;
result = isc_rwlock_tryupgrade(&zmgr->urlock);
if (result == ISC_R_SUCCESS) {
locktype = isc_rwlocktype_write;
zmgr->unreachable[i].expire = 0;
isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
DNS_LOGMODULE_ZONE, ISC_LOG_INFO,
"master %s (source %s) deleted "
"from unreachable cache",
master, source);
}
break;
}
}
RWUNLOCK(&zmgr->urlock, locktype);
}
void
dns_zonemgr_unreachableadd(dns_zonemgr_t *zmgr, isc_sockaddr_t *remote,
isc_sockaddr_t *local, isc_time_t *now)
{
uint32_t seconds = isc_time_seconds(now);
uint32_t last = seconds;
unsigned int i, slot = UNREACH_CHACHE_SIZE, oldest = 0;
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
RWLOCK(&zmgr->urlock, isc_rwlocktype_write);
for (i = 0; i < UNREACH_CHACHE_SIZE; i++) {
/* Existing entry? */
if (isc_sockaddr_equal(&zmgr->unreachable[i].remote, remote) &&
isc_sockaddr_equal(&zmgr->unreachable[i].local, local))
break;
/* Empty slot? */
if (zmgr->unreachable[i].expire < seconds)
slot = i;
/* Least recently used slot? */
if (zmgr->unreachable[i].last < last) {
last = zmgr->unreachable[i].last;
oldest = i;
}
}
if (i < UNREACH_CHACHE_SIZE) {
/*
* Found a existing entry. Update the expire timer and
* last usage timestamps.
*/
zmgr->unreachable[i].expire = seconds + UNREACH_HOLD_TIME;
zmgr->unreachable[i].last = seconds;
if (zmgr->unreachable[i].expire < seconds)
zmgr->unreachable[i].count = 1;
else
zmgr->unreachable[i].count++;
} else if (slot != UNREACH_CHACHE_SIZE) {
/*
* Found a empty slot. Add a new entry to the cache.
*/
zmgr->unreachable[slot].expire = seconds + UNREACH_HOLD_TIME;
zmgr->unreachable[slot].last = seconds;
zmgr->unreachable[slot].remote = *remote;
zmgr->unreachable[slot].local = *local;
zmgr->unreachable[slot].count = 1;
} else {
/*
* Replace the least recently used entry in the cache.
*/
zmgr->unreachable[oldest].expire = seconds + UNREACH_HOLD_TIME;
zmgr->unreachable[oldest].last = seconds;
zmgr->unreachable[oldest].remote = *remote;
zmgr->unreachable[oldest].local = *local;
zmgr->unreachable[oldest].count = 1;
}
RWUNLOCK(&zmgr->urlock, isc_rwlocktype_write);
}
void
dns_zone_forcereload(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
if (zone->type == dns_zone_master ||
(zone->type == dns_zone_redirect && zone->masters == NULL))
return;
LOCK_ZONE(zone);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_FORCEXFER);
UNLOCK_ZONE(zone);
dns_zone_refresh(zone);
}
bool
dns_zone_isforced(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FORCEXFER));
}
isc_result_t
dns_zone_setstatistics(dns_zone_t *zone, bool on) {
/*
* This function is obsoleted.
*/
UNUSED(zone);
UNUSED(on);
return (ISC_R_NOTIMPLEMENTED);
}
uint64_t *
dns_zone_getstatscounters(dns_zone_t *zone) {
/*
* This function is obsoleted.
*/
UNUSED(zone);
return (NULL);
}
void
dns_zone_setstats(dns_zone_t *zone, isc_stats_t *stats) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(zone->stats == NULL);
LOCK_ZONE(zone);
zone->stats = NULL;
isc_stats_attach(stats, &zone->stats);
UNLOCK_ZONE(zone);
}
void
dns_zone_setrequeststats(dns_zone_t *zone, isc_stats_t *stats) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->requeststats_on && stats == NULL)
zone->requeststats_on = false;
else if (!zone->requeststats_on && stats != NULL) {
if (zone->requeststats == NULL) {
isc_stats_attach(stats, &zone->requeststats);
zone->requeststats_on = true;
}
}
UNLOCK_ZONE(zone);
}
void
dns_zone_setrcvquerystats(dns_zone_t *zone, dns_stats_t *stats) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->requeststats_on && stats != NULL) {
if (zone->rcvquerystats == NULL) {
dns_stats_attach(stats, &zone->rcvquerystats);
zone->requeststats_on = true;
}
}
UNLOCK_ZONE(zone);
}
isc_stats_t *
dns_zone_getrequeststats(dns_zone_t *zone) {
/*
* We don't lock zone for efficiency reason. This is not catastrophic
* because requeststats must always be valid when requeststats_on is
* true.
* Some counters may be incremented while requeststats_on is becoming
* false, or some cannot be incremented just after the statistics are
* installed, but it shouldn't matter much in practice.
*/
if (zone->requeststats_on)
return (zone->requeststats);
else
return (NULL);
}
/*
* Return the received query stats bucket
* see note from dns_zone_getrequeststats()
*/
dns_stats_t *
dns_zone_getrcvquerystats(dns_zone_t *zone) {
if (zone->requeststats_on)
return (zone->rcvquerystats);
else
return (NULL);
}
void
dns_zone_dialup(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
zone_debuglog(zone, "dns_zone_dialup", 3,
"notify = %d, refresh = %d",
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALNOTIFY),
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALREFRESH));
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALNOTIFY))
dns_zone_notify(zone);
if (zone->type != dns_zone_master && zone->masters != NULL &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALREFRESH))
dns_zone_refresh(zone);
}
void
dns_zone_setdialup(dns_zone_t *zone, dns_dialuptype_t dialup) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_DIALNOTIFY |
DNS_ZONEFLG_DIALREFRESH |
DNS_ZONEFLG_NOREFRESH);
switch (dialup) {
case dns_dialuptype_no:
break;
case dns_dialuptype_yes:
DNS_ZONE_SETFLAG(zone, (DNS_ZONEFLG_DIALNOTIFY |
DNS_ZONEFLG_DIALREFRESH |
DNS_ZONEFLG_NOREFRESH));
break;
case dns_dialuptype_notify:
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_DIALNOTIFY);
break;
case dns_dialuptype_notifypassive:
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_DIALNOTIFY);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOREFRESH);
break;
case dns_dialuptype_refresh:
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_DIALREFRESH);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOREFRESH);
break;
case dns_dialuptype_passive:
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOREFRESH);
break;
default:
INSIST(0);
ISC_UNREACHABLE();
}
UNLOCK_ZONE(zone);
}
isc_result_t
dns_zone_setkeydirectory(dns_zone_t *zone, const char *directory) {
isc_result_t result = ISC_R_SUCCESS;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
result = dns_zone_setstring(zone, &zone->keydirectory, directory);
UNLOCK_ZONE(zone);
return (result);
}
const char *
dns_zone_getkeydirectory(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->keydirectory);
}
unsigned int
dns_zonemgr_getcount(dns_zonemgr_t *zmgr, int state) {
dns_zone_t *zone;
unsigned int count = 0;
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
RWLOCK(&zmgr->rwlock, isc_rwlocktype_read);
switch (state) {
case DNS_ZONESTATE_XFERRUNNING:
for (zone = ISC_LIST_HEAD(zmgr->xfrin_in_progress);
zone != NULL;
zone = ISC_LIST_NEXT(zone, statelink))
count++;
break;
case DNS_ZONESTATE_XFERDEFERRED:
for (zone = ISC_LIST_HEAD(zmgr->waiting_for_xfrin);
zone != NULL;
zone = ISC_LIST_NEXT(zone, statelink))
count++;
break;
case DNS_ZONESTATE_SOAQUERY:
for (zone = ISC_LIST_HEAD(zmgr->zones);
zone != NULL;
zone = ISC_LIST_NEXT(zone, link))
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_REFRESH))
count++;
break;
case DNS_ZONESTATE_ANY:
for (zone = ISC_LIST_HEAD(zmgr->zones);
zone != NULL;
zone = ISC_LIST_NEXT(zone, link)) {
dns_view_t *view = zone->view;
if (view != NULL && strcmp(view->name, "_bind") == 0)
continue;
count++;
}
break;
case DNS_ZONESTATE_AUTOMATIC:
for (zone = ISC_LIST_HEAD(zmgr->zones);
zone != NULL;
zone = ISC_LIST_NEXT(zone, link)) {
dns_view_t *view = zone->view;
if (view != NULL && strcmp(view->name, "_bind") == 0)
continue;
if (zone->automatic)
count++;
}
break;
default:
INSIST(0);
ISC_UNREACHABLE();
}
RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_read);
return (count);
}
isc_result_t
dns_zone_checknames(dns_zone_t *zone, dns_name_t *name, dns_rdata_t *rdata) {
bool ok = true;
bool fail = false;
char namebuf[DNS_NAME_FORMATSIZE];
char namebuf2[DNS_NAME_FORMATSIZE];
char typebuf[DNS_RDATATYPE_FORMATSIZE];
int level = ISC_LOG_WARNING;
dns_name_t bad;
REQUIRE(DNS_ZONE_VALID(zone));
if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKNAMES) &&
rdata->type != dns_rdatatype_nsec3)
return (ISC_R_SUCCESS);
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKNAMESFAIL) ||
rdata->type == dns_rdatatype_nsec3) {
level = ISC_LOG_ERROR;
fail = true;
}
ok = dns_rdata_checkowner(name, rdata->rdclass, rdata->type, true);
if (!ok) {
dns_name_format(name, namebuf, sizeof(namebuf));
dns_rdatatype_format(rdata->type, typebuf, sizeof(typebuf));
dns_zone_log(zone, level, "%s/%s: %s", namebuf, typebuf,
dns_result_totext(DNS_R_BADOWNERNAME));
if (fail)
return (DNS_R_BADOWNERNAME);
}
dns_name_init(&bad, NULL);
ok = dns_rdata_checknames(rdata, name, &bad);
if (!ok) {
dns_name_format(name, namebuf, sizeof(namebuf));
dns_name_format(&bad, namebuf2, sizeof(namebuf2));
dns_rdatatype_format(rdata->type, typebuf, sizeof(typebuf));
dns_zone_log(zone, level, "%s/%s: %s: %s ", namebuf, typebuf,
namebuf2, dns_result_totext(DNS_R_BADNAME));
if (fail)
return (DNS_R_BADNAME);
}
return (ISC_R_SUCCESS);
}
void
dns_zone_setcheckmx(dns_zone_t *zone, dns_checkmxfunc_t checkmx) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->checkmx = checkmx;
}
void
dns_zone_setchecksrv(dns_zone_t *zone, dns_checksrvfunc_t checksrv) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->checksrv = checksrv;
}
void
dns_zone_setcheckns(dns_zone_t *zone, dns_checknsfunc_t checkns) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->checkns = checkns;
}
void
dns_zone_setisself(dns_zone_t *zone, dns_isselffunc_t isself, void *arg) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->isself = isself;
zone->isselfarg = arg;
UNLOCK_ZONE(zone);
}
void
dns_zone_setnotifydelay(dns_zone_t *zone, uint32_t delay) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->notifydelay = delay;
UNLOCK_ZONE(zone);
}
uint32_t
dns_zone_getnotifydelay(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->notifydelay);
}
isc_result_t
dns_zone_signwithkey(dns_zone_t *zone, dns_secalg_t algorithm,
uint16_t keyid, bool deleteit)
{
isc_result_t result;
REQUIRE(DNS_ZONE_VALID(zone));
dns_zone_log(zone, ISC_LOG_NOTICE,
"dns_zone_signwithkey(algorithm=%u, keyid=%u)",
algorithm, keyid);
LOCK_ZONE(zone);
result = zone_signwithkey(zone, algorithm, keyid, deleteit);
UNLOCK_ZONE(zone);
return (result);
}
/*
* Called when a dynamic update for an NSEC3PARAM record is received.
*
* If set, transform the NSEC3 salt into human-readable form so that it can be
* logged. Then call zone_addnsec3chain(), passing NSEC3PARAM RDATA to it.
*/
isc_result_t
dns_zone_addnsec3chain(dns_zone_t *zone, dns_rdata_nsec3param_t *nsec3param) {
isc_result_t result;
char salt[255*2+1];
REQUIRE(DNS_ZONE_VALID(zone));
result = dns_nsec3param_salttotext(nsec3param, salt, sizeof(salt));
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_zone_log(zone, ISC_LOG_NOTICE,
"dns_zone_addnsec3chain(hash=%u, iterations=%u, salt=%s)",
nsec3param->hash, nsec3param->iterations,
salt);
LOCK_ZONE(zone);
result = zone_addnsec3chain(zone, nsec3param);
UNLOCK_ZONE(zone);
return (result);
}
void
dns_zone_setnodes(dns_zone_t *zone, uint32_t nodes) {
REQUIRE(DNS_ZONE_VALID(zone));
if (nodes == 0)
nodes = 1;
zone->nodes = nodes;
}
void
dns_zone_setsignatures(dns_zone_t *zone, uint32_t signatures) {
REQUIRE(DNS_ZONE_VALID(zone));
/*
* We treat signatures as a signed value so explicitly
* limit its range here.
*/
if (signatures > INT32_MAX)
signatures = INT32_MAX;
else if (signatures == 0)
signatures = 1;
zone->signatures = signatures;
}
uint32_t
dns_zone_getsignatures(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->signatures);
}
void
dns_zone_setprivatetype(dns_zone_t *zone, dns_rdatatype_t type) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->privatetype = type;
}
dns_rdatatype_t
dns_zone_getprivatetype(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->privatetype);
}
static isc_result_t
zone_signwithkey(dns_zone_t *zone, dns_secalg_t algorithm, uint16_t keyid,
bool deleteit)
{
dns_signing_t *signing;
dns_signing_t *current;
isc_result_t result = ISC_R_SUCCESS;
isc_time_t now;
dns_db_t *db = NULL;
signing = isc_mem_get(zone->mctx, sizeof *signing);
if (signing == NULL)
return (ISC_R_NOMEMORY);
signing->magic = 0;
signing->db = NULL;
signing->dbiterator = NULL;
signing->algorithm = algorithm;
signing->keyid = keyid;
signing->deleteit = deleteit;
signing->done = false;
TIME_NOW(&now);
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL)
dns_db_attach(zone->db, &db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
if (db == NULL) {
result = ISC_R_NOTFOUND;
goto cleanup;
}
dns_db_attach(db, &signing->db);
for (current = ISC_LIST_HEAD(zone->signing);
current != NULL;
current = ISC_LIST_NEXT(current, link)) {
if (current->db == signing->db &&
current->algorithm == signing->algorithm &&
current->keyid == signing->keyid) {
if (current->deleteit != signing->deleteit)
current->done = true;
else
goto cleanup;
}
}
result = dns_db_createiterator(signing->db, 0,
&signing->dbiterator);
if (result == ISC_R_SUCCESS)
result = dns_dbiterator_first(signing->dbiterator);
if (result == ISC_R_SUCCESS) {
dns_dbiterator_pause(signing->dbiterator);
ISC_LIST_INITANDAPPEND(zone->signing, signing, link);
signing = NULL;
if (isc_time_isepoch(&zone->signingtime)) {
zone->signingtime = now;
if (zone->task != NULL)
zone_settimer(zone, &now);
}
}
cleanup:
if (signing != NULL) {
if (signing->db != NULL)
dns_db_detach(&signing->db);
if (signing->dbiterator != NULL)
dns_dbiterator_destroy(&signing->dbiterator);
isc_mem_put(zone->mctx, signing, sizeof *signing);
}
if (db != NULL)
dns_db_detach(&db);
return (result);
}
static void
logmsg(const char *format, ...) {
va_list args;
va_start(args, format);
isc_log_vwrite(dns_lctx, DNS_LOGCATEGORY_GENERAL, DNS_LOGMODULE_ZONE,
ISC_LOG_DEBUG(1), format, args);
va_end(args);
}
static void
clear_keylist(dns_dnsseckeylist_t *list, isc_mem_t *mctx) {
dns_dnsseckey_t *key;
while (!ISC_LIST_EMPTY(*list)) {
key = ISC_LIST_HEAD(*list);
ISC_LIST_UNLINK(*list, key, link);
dns_dnsseckey_destroy(mctx, &key);
}
}
/* Called once; *timep should be set to the current time. */
static isc_result_t
next_keyevent(dst_key_t *key, isc_stdtime_t *timep) {
isc_result_t result;
isc_stdtime_t now, then = 0, event;
int i;
now = *timep;
for (i = 0; i <= DST_MAX_TIMES; i++) {
result = dst_key_gettime(key, i, &event);
if (result == ISC_R_SUCCESS && event > now &&
(then == 0 || event < then))
then = event;
}
if (then != 0) {
*timep = then;
return (ISC_R_SUCCESS);
}
return (ISC_R_NOTFOUND);
}
static isc_result_t
rr_exists(dns_db_t *db, dns_dbversion_t *ver, dns_name_t *name,
const dns_rdata_t *rdata, bool *flag)
{
dns_rdataset_t rdataset;
dns_dbnode_t *node = NULL;
isc_result_t result;
dns_rdataset_init(&rdataset);
if (rdata->type == dns_rdatatype_nsec3)
CHECK(dns_db_findnsec3node(db, name, false, &node));
else
CHECK(dns_db_findnode(db, name, false, &node));
result = dns_db_findrdataset(db, node, ver, rdata->type, 0,
(isc_stdtime_t) 0, &rdataset, NULL);
if (result == ISC_R_NOTFOUND) {
*flag = false;
result = ISC_R_SUCCESS;
goto failure;
}
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset)) {
dns_rdata_t myrdata = DNS_RDATA_INIT;
dns_rdataset_current(&rdataset, &myrdata);
if (!dns_rdata_compare(&myrdata, rdata))
break;
}
dns_rdataset_disassociate(&rdataset);
if (result == ISC_R_SUCCESS) {
*flag = true;
} else if (result == ISC_R_NOMORE) {
*flag = false;
result = ISC_R_SUCCESS;
}
failure:
if (node != NULL)
dns_db_detachnode(db, &node);
return (result);
}
/*
* Add records to signal the state of signing or of key removal.
*/
static isc_result_t
add_signing_records(dns_db_t *db, dns_rdatatype_t privatetype,
dns_dbversion_t *ver, dns_diff_t *diff,
bool sign_all)
{
dns_difftuple_t *tuple, *newtuple = NULL;
dns_rdata_dnskey_t dnskey;
dns_rdata_t rdata = DNS_RDATA_INIT;
bool flag;
isc_region_t r;
isc_result_t result = ISC_R_SUCCESS;
uint16_t keyid;
unsigned char buf[5];
dns_name_t *name = dns_db_origin(db);
for (tuple = ISC_LIST_HEAD(diff->tuples);
tuple != NULL;
tuple = ISC_LIST_NEXT(tuple, link)) {
if (tuple->rdata.type != dns_rdatatype_dnskey) {
continue;
}
result = dns_rdata_tostruct(&tuple->rdata, &dnskey, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if ((dnskey.flags &
(DNS_KEYFLAG_OWNERMASK|DNS_KEYTYPE_NOAUTH))
!= DNS_KEYOWNER_ZONE)
{
continue;
}
dns_rdata_toregion(&tuple->rdata, &r);
keyid = dst_region_computeid(&r, dnskey.algorithm);
buf[0] = dnskey.algorithm;
buf[1] = (keyid & 0xff00) >> 8;
buf[2] = (keyid & 0xff);
buf[3] = (tuple->op == DNS_DIFFOP_ADD) ? 0 : 1;
buf[4] = 0;
rdata.data = buf;
rdata.length = sizeof(buf);
rdata.type = privatetype;
rdata.rdclass = tuple->rdata.rdclass;
if (sign_all || tuple->op == DNS_DIFFOP_DEL) {
CHECK(rr_exists(db, ver, name, &rdata, &flag));
if (flag) {
continue;
}
CHECK(dns_difftuple_create(diff->mctx, DNS_DIFFOP_ADD,
name, 0, &rdata, &newtuple));
CHECK(do_one_tuple(&newtuple, db, ver, diff));
INSIST(newtuple == NULL);
}
/*
* Remove any record which says this operation has already
* completed.
*/
buf[4] = 1;
CHECK(rr_exists(db, ver, name, &rdata, &flag));
if (flag) {
CHECK(dns_difftuple_create(diff->mctx, DNS_DIFFOP_DEL,
name, 0, &rdata, &newtuple));
CHECK(do_one_tuple(&newtuple, db, ver, diff));
INSIST(newtuple == NULL);
}
}
failure:
return (result);
}
static isc_result_t
sign_apex(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *ver,
isc_stdtime_t now, dns_diff_t *diff, dns__zonediff_t *zonediff)
{
isc_result_t result;
isc_stdtime_t inception, soaexpire;
bool check_ksk, keyset_kskonly;
dst_key_t *zone_keys[DNS_MAXZONEKEYS];
unsigned int nkeys = 0, i;
dns_difftuple_t *tuple;
result = dns__zone_findkeys(zone, db, ver, now, zone->mctx,
DNS_MAXZONEKEYS, zone_keys, &nkeys);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"sign_apex:dns__zone_findkeys -> %s",
dns_result_totext(result));
return (result);
}
inception = now - 3600; /* Allow for clock skew. */
soaexpire = now + dns_zone_getsigvalidityinterval(zone);
check_ksk = DNS_ZONE_OPTION(zone, DNS_ZONEOPT_UPDATECHECKKSK);
keyset_kskonly = DNS_ZONE_OPTION(zone, DNS_ZONEOPT_DNSKEYKSKONLY);
/*
* See if dns__zone_updatesigs() will update DNSKEY signature and if
* not cause them to sign so that newly activated keys are used.
*/
for (tuple = ISC_LIST_HEAD(diff->tuples);
tuple != NULL;
tuple = ISC_LIST_NEXT(tuple, link)) {
if (tuple->rdata.type == dns_rdatatype_dnskey &&
dns_name_equal(&tuple->name, &zone->origin))
break;
}
if (tuple == NULL) {
result = del_sigs(zone, db, ver, &zone->origin,
dns_rdatatype_dnskey, zonediff,
zone_keys, nkeys, now, false);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"sign_apex:del_sigs -> %s",
dns_result_totext(result));
goto failure;
}
result = add_sigs(db, ver, &zone->origin, dns_rdatatype_dnskey,
zonediff->diff, zone_keys, nkeys, zone->mctx,
inception, soaexpire, check_ksk,
keyset_kskonly);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"sign_apex:add_sigs -> %s",
dns_result_totext(result));
goto failure;
}
}
result = dns__zone_updatesigs(diff, db, ver, zone_keys, nkeys, zone,
inception, soaexpire, now, check_ksk,
keyset_kskonly, zonediff);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"sign_apex:dns__zone_updatesigs -> %s",
dns_result_totext(result));
goto failure;
}
failure:
for (i = 0; i < nkeys; i++)
dst_key_free(&zone_keys[i]);
return (result);
}
/*
* Prevent the zone entering a inconsistent state where
* NSEC only DNSKEYs are present with NSEC3 chains.
* See update.c:check_dnssec()
*/
static bool
dnskey_sane(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *ver,
dns_diff_t *diff)
{
isc_result_t result;
dns_difftuple_t *tuple;
bool nseconly = false, nsec3 = false;
dns_rdatatype_t privatetype = dns_zone_getprivatetype(zone);
/* Scan the tuples for an NSEC-only DNSKEY */
for (tuple = ISC_LIST_HEAD(diff->tuples);
tuple != NULL;
tuple = ISC_LIST_NEXT(tuple, link)) {
uint8_t alg;
if (tuple->rdata.type != dns_rdatatype_dnskey ||
tuple->op != DNS_DIFFOP_ADD)
continue;
alg = tuple->rdata.data[3];
if (alg == DST_ALG_RSAMD5 || alg == DST_ALG_RSASHA1 ||
alg == DST_ALG_DSA || alg == DST_ALG_ECC) {
nseconly = true;
break;
}
}
/* Check existing DB for NSEC-only DNSKEY */
if (!nseconly) {
result = dns_nsec_nseconly(db, ver, &nseconly);
if (result == ISC_R_NOTFOUND)
result = ISC_R_SUCCESS;
CHECK(result);
}
/* Check existing DB for NSEC3 */
if (!nsec3)
CHECK(dns_nsec3_activex(db, ver, false,
privatetype, &nsec3));
/* Refuse to allow NSEC3 with NSEC-only keys */
if (nseconly && nsec3) {
dns_zone_log(zone, ISC_LOG_ERROR,
"NSEC only DNSKEYs and NSEC3 chains not allowed");
goto failure;
}
return (true);
failure:
return (false);
}
static isc_result_t
clean_nsec3param(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *ver,
dns_diff_t *diff)
{
isc_result_t result;
dns_dbnode_t *node = NULL;
dns_rdataset_t rdataset;
dns_rdataset_init(&rdataset);
CHECK(dns_db_getoriginnode(db, &node));
result = dns_db_findrdataset(db, node, ver, dns_rdatatype_dnskey,
dns_rdatatype_none, 0, &rdataset, NULL);
if (dns_rdataset_isassociated(&rdataset))
dns_rdataset_disassociate(&rdataset);
if (result != ISC_R_NOTFOUND)
goto failure;
result = dns_nsec3param_deletechains(db, ver, zone, true, diff);
failure:
if (node != NULL)
dns_db_detachnode(db, &node);
return (result);
}
/*
* Given an RRSIG rdataset and an algorithm, determine whether there
* are any signatures using that algorithm.
*/
static bool
signed_with_alg(dns_rdataset_t *rdataset, dns_secalg_t alg) {
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdata_rrsig_t rrsig;
isc_result_t result;
REQUIRE(rdataset == NULL || rdataset->type == dns_rdatatype_rrsig);
if (rdataset == NULL || !dns_rdataset_isassociated(rdataset)) {
return (false);
}
for (result = dns_rdataset_first(rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(rdataset))
{
dns_rdataset_current(rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &rrsig, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_rdata_reset(&rdata);
if (rrsig.algorithm == alg)
return (true);
}
return (false);
}
static isc_result_t
add_chains(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *ver,
dns_diff_t *diff)
{
dns_name_t *origin;
bool build_nsec3;
isc_result_t result;
origin = dns_db_origin(db);
CHECK(dns_private_chains(db, ver, zone->privatetype, NULL,
&build_nsec3));
if (build_nsec3)
CHECK(dns_nsec3_addnsec3sx(db, ver, origin, zone->minimum,
false, zone->privatetype, diff));
CHECK(updatesecure(db, ver, origin, zone->minimum, true, diff));
failure:
return (result);
}
static void
zone_rekey(dns_zone_t *zone) {
isc_result_t result;
dns_db_t *db = NULL;
dns_dbnode_t *node = NULL;
dns_dbversion_t *ver = NULL;
dns_rdataset_t cdsset, soaset, soasigs, keyset, keysigs, cdnskeyset;
dns_dnsseckeylist_t dnskeys, keys, rmkeys;
dns_dnsseckey_t *key;
dns_diff_t diff, _sig_diff;
dns__zonediff_t zonediff;
bool commit = false, newactive = false;
bool newalg = false;
bool fullsign;
dns_ttl_t ttl = 3600;
const char *dir;
isc_mem_t *mctx;
isc_stdtime_t now;
isc_time_t timenow;
isc_interval_t ival;
char timebuf[80];
REQUIRE(DNS_ZONE_VALID(zone));
ISC_LIST_INIT(dnskeys);
ISC_LIST_INIT(keys);
ISC_LIST_INIT(rmkeys);
dns_rdataset_init(&soaset);
dns_rdataset_init(&soasigs);
dns_rdataset_init(&keyset);
dns_rdataset_init(&keysigs);
dns_rdataset_init(&cdsset);
dns_rdataset_init(&cdnskeyset);
dir = dns_zone_getkeydirectory(zone);
mctx = zone->mctx;
dns_diff_init(mctx, &diff);
dns_diff_init(mctx, &_sig_diff);
zonediff_init(&zonediff, &_sig_diff);
CHECK(dns_zone_getdb(zone, &db));
CHECK(dns_db_newversion(db, &ver));
CHECK(dns_db_getoriginnode(db, &node));
TIME_NOW(&timenow);
now = isc_time_seconds(&timenow);
dns_zone_log(zone, ISC_LOG_INFO, "reconfiguring zone keys");
/* Get the SOA record's TTL */
CHECK(dns_db_findrdataset(db, node, ver, dns_rdatatype_soa,
dns_rdatatype_none, 0, &soaset, &soasigs));
ttl = soaset.ttl;
dns_rdataset_disassociate(&soaset);
/* Get the DNSKEY rdataset */
result = dns_db_findrdataset(db, node, ver, dns_rdatatype_dnskey,
dns_rdatatype_none, 0, &keyset, &keysigs);
if (result == ISC_R_SUCCESS) {
ttl = keyset.ttl;
CHECK(dns_dnssec_keylistfromrdataset(&zone->origin, dir,
mctx, &keyset,
&keysigs, &soasigs,
false, false,
&dnskeys));
} else if (result != ISC_R_NOTFOUND)
goto failure;
/* Get the CDS rdataset */
result = dns_db_findrdataset(db, node, ver, dns_rdatatype_cds,
dns_rdatatype_none, 0, &cdsset, NULL);
if (result != ISC_R_SUCCESS && dns_rdataset_isassociated(&cdsset))
dns_rdataset_disassociate(&cdsset);
/* Get the CDNSKEY rdataset */
result = dns_db_findrdataset(db, node, ver, dns_rdatatype_cdnskey,
dns_rdatatype_none, 0, &cdnskeyset, NULL);
if (result != ISC_R_SUCCESS && dns_rdataset_isassociated(&cdnskeyset))
dns_rdataset_disassociate(&cdnskeyset);
/*
* True when called from "rndc sign". Indicates the zone should be
* fully signed now.
*/
fullsign = DNS_ZONEKEY_OPTION(zone, DNS_ZONEKEY_FULLSIGN);
result = dns_dnssec_findmatchingkeys2(&zone->origin, dir, now, mctx,
&keys);
if (result == ISC_R_SUCCESS) {
bool check_ksk;
check_ksk = DNS_ZONE_OPTION(zone, DNS_ZONEOPT_UPDATECHECKKSK);
result = dns_dnssec_updatekeys(&dnskeys, &keys, &rmkeys,
&zone->origin, ttl, &diff,
!check_ksk,
mctx, logmsg);
/*
* Keys couldn't be updated for some reason;
* try again later.
*/
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR, "zone_rekey:"
"couldn't update zone keys: %s",
isc_result_totext(result));
goto failure;
}
/*
* Update CDS / CDNSKEY records.
*/
result = dns_dnssec_syncupdate(&dnskeys, &rmkeys, &cdsset,
&cdnskeyset, now, ttl,
&diff, mctx);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR, "zone_rekey:"
"couldn't update CDS/CDNSKEY: %s",
isc_result_totext(result));
goto failure;
}
/*
* See if any pre-existing keys have newly become active;
* also, see if any new key is for a new algorithm, as in that
* event, we need to sign the zone fully. (If there's a new
* key, but it's for an already-existing algorithm, then
* the zone signing can be handled incrementally.)
*/
for (key = ISC_LIST_HEAD(dnskeys);
key != NULL;
key = ISC_LIST_NEXT(key, link)) {
if (!key->first_sign)
continue;
newactive = true;
if (!dns_rdataset_isassociated(&keysigs)) {
newalg = true;
break;
}
if (signed_with_alg(&keysigs, dst_key_alg(key->key))) {
/*
* This isn't a new algorithm; clear
* first_sign so we won't sign the
* whole zone with this key later
*/
key->first_sign = false;
} else {
newalg = true;
break;
}
}
if ((newactive || fullsign || !ISC_LIST_EMPTY(diff.tuples)) &&
dnskey_sane(zone, db, ver, &diff)) {
CHECK(dns_diff_apply(&diff, db, ver));
CHECK(clean_nsec3param(zone, db, ver, &diff));
CHECK(add_signing_records(db, zone->privatetype,
ver, &diff,
(newalg || fullsign)));
CHECK(update_soa_serial(db, ver, &diff, mctx,
zone->updatemethod));
CHECK(add_chains(zone, db, ver, &diff));
CHECK(sign_apex(zone, db, ver, now, &diff, &zonediff));
CHECK(zone_journal(zone, zonediff.diff, NULL,
"zone_rekey"));
commit = true;
}
}
dns_db_closeversion(db, &ver, true);
LOCK_ZONE(zone);
if (commit) {
dns_difftuple_t *tuple;
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDNOTIFY);
zone_needdump(zone, DNS_DUMP_DELAY);
zone_settimer(zone, &timenow);
/* Remove any signatures from removed keys. */
if (!ISC_LIST_EMPTY(rmkeys)) {
for (key = ISC_LIST_HEAD(rmkeys);
key != NULL;
key = ISC_LIST_NEXT(key, link)) {
result = zone_signwithkey(zone,
dst_key_alg(key->key),
dst_key_id(key->key),
true);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_signwithkey failed: %s",
dns_result_totext(result));
}
}
}
if (fullsign) {
/*
* "rndc sign" was called, so we now sign the zone
* with all active keys, whether they're new or not.
*/
for (key = ISC_LIST_HEAD(dnskeys);
key != NULL;
key = ISC_LIST_NEXT(key, link)) {
if (!key->force_sign && !key->hint_sign)
continue;
result = zone_signwithkey(zone,
dst_key_alg(key->key),
dst_key_id(key->key),
false);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_signwithkey failed: %s",
dns_result_totext(result));
}
}
} else if (newalg) {
/*
* We haven't been told to sign fully, but a new
* algorithm was added to the DNSKEY. We sign
* the full zone, but only with newly active
* keys.
*/
for (key = ISC_LIST_HEAD(dnskeys);
key != NULL;
key = ISC_LIST_NEXT(key, link)) {
if (!key->first_sign)
continue;
result = zone_signwithkey(zone,
dst_key_alg(key->key),
dst_key_id(key->key),
false);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_signwithkey failed: %s",
dns_result_totext(result));
}
}
}
/*
* Clear fullsign flag, if it was set, so we don't do
* another full signing next time
*/
zone->keyopts &= ~DNS_ZONEKEY_FULLSIGN;
/*
* Cause the zone to add/delete NSEC3 chains for the
* deferred NSEC3PARAM changes.
*/
for (tuple = ISC_LIST_HEAD(zonediff.diff->tuples);
tuple != NULL;
tuple = ISC_LIST_NEXT(tuple, link)) {
unsigned char buf[DNS_NSEC3PARAM_BUFFERSIZE];
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdata_nsec3param_t nsec3param;
if (tuple->rdata.type != zone->privatetype ||
tuple->op != DNS_DIFFOP_ADD)
continue;
if (!dns_nsec3param_fromprivate(&tuple->rdata, &rdata,
buf, sizeof(buf)))
continue;
result = dns_rdata_tostruct(&rdata, &nsec3param, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (nsec3param.flags == 0)
continue;
result = zone_addnsec3chain(zone, &nsec3param);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_addnsec3chain failed: %s",
dns_result_totext(result));
}
}
/*
* Activate any NSEC3 chain updates that may have
* been scheduled before this rekey.
*/
if (fullsign || newalg)
resume_addnsec3chain(zone);
/*
* Schedule the next resigning event
*/
set_resigntime(zone);
}
isc_time_settoepoch(&zone->refreshkeytime);
/*
* If we're doing key maintenance, set the key refresh timer to
* the next scheduled key event or to 'dnssec-loadkeys-interval'
* seconds in the future, whichever is sooner.
*/
if (DNS_ZONEKEY_OPTION(zone, DNS_ZONEKEY_MAINTAIN)) {
isc_time_t timethen;
isc_stdtime_t then;
DNS_ZONE_TIME_ADD(&timenow, zone->refreshkeyinterval,
&timethen);
zone->refreshkeytime = timethen;
for (key = ISC_LIST_HEAD(dnskeys);
key != NULL;
key = ISC_LIST_NEXT(key, link)) {
then = now;
result = next_keyevent(key->key, &then);
if (result != ISC_R_SUCCESS)
continue;
DNS_ZONE_TIME_ADD(&timenow, then - now, &timethen);
if (isc_time_compare(&timethen,
&zone->refreshkeytime) < 0) {
zone->refreshkeytime = timethen;
}
}
zone_settimer(zone, &timenow);
isc_time_formattimestamp(&zone->refreshkeytime, timebuf, 80);
dns_zone_log(zone, ISC_LOG_INFO, "next key event: %s", timebuf);
}
UNLOCK_ZONE(zone);
done:
dns_diff_clear(&diff);
dns_diff_clear(&_sig_diff);
clear_keylist(&dnskeys, mctx);
clear_keylist(&keys, mctx);
clear_keylist(&rmkeys, mctx);
if (ver != NULL)
dns_db_closeversion(db, &ver, false);
if (dns_rdataset_isassociated(&cdsset))
dns_rdataset_disassociate(&cdsset);
if (dns_rdataset_isassociated(&keyset))
dns_rdataset_disassociate(&keyset);
if (dns_rdataset_isassociated(&keysigs))
dns_rdataset_disassociate(&keysigs);
if (dns_rdataset_isassociated(&soasigs))
dns_rdataset_disassociate(&soasigs);
if (dns_rdataset_isassociated(&cdnskeyset))
dns_rdataset_disassociate(&cdnskeyset);
if (node != NULL)
dns_db_detachnode(db, &node);
if (db != NULL)
dns_db_detach(&db);
INSIST(ver == NULL);
return;
failure:
/*
* Something went wrong; try again in ten minutes or
* after a key refresh interval, whichever is shorter.
*/
LOCK_ZONE(zone);
isc_interval_set(&ival, ISC_MIN(zone->refreshkeyinterval, 600), 0);
isc_time_nowplusinterval(&zone->refreshkeytime, &ival);
UNLOCK_ZONE(zone);
goto done;
}
void
dns_zone_rekey(dns_zone_t *zone, bool fullsign) {
isc_time_t now;
if (zone->type == dns_zone_master && zone->task != NULL) {
LOCK_ZONE(zone);
if (fullsign)
zone->keyopts |= DNS_ZONEKEY_FULLSIGN;
TIME_NOW(&now);
zone->refreshkeytime = now;
zone_settimer(zone, &now);
UNLOCK_ZONE(zone);
}
}
isc_result_t
dns_zone_nscheck(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *version,
unsigned int *errors)
{
isc_result_t result;
dns_dbnode_t *node = NULL;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(errors != NULL);
result = dns_db_getoriginnode(db, &node);
if (result != ISC_R_SUCCESS)
return (result);
result = zone_count_ns_rr(zone, db, node, version, NULL, errors,
false);
dns_db_detachnode(db, &node);
return (result);
}
isc_result_t
dns_zone_cdscheck(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *version) {
isc_result_t result;
dns_dbnode_t *node = NULL;
dns_rdataset_t dnskey, cds, cdnskey;
unsigned char buffer[DNS_DS_BUFFERSIZE];
unsigned char algorithms[256];
unsigned int i;
enum { notexpected = 0, expected = 1, found = 2 };
REQUIRE(DNS_ZONE_VALID(zone));
result = dns_db_getoriginnode(db, &node);
if (result != ISC_R_SUCCESS) {
return (result);
}
dns_rdataset_init(&cds);
dns_rdataset_init(&dnskey);
dns_rdataset_init(&cdnskey);
result = dns_db_findrdataset(db, node, version, dns_rdatatype_cds,
dns_rdatatype_none, 0, &cds, NULL);
if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND) {
goto failure;
}
result = dns_db_findrdataset(db, node, version, dns_rdatatype_cdnskey,
dns_rdatatype_none, 0, &cdnskey, NULL);
if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND) {
goto failure;
}
if (!dns_rdataset_isassociated(&cds) &&
!dns_rdataset_isassociated(&cdnskey))
{
result = ISC_R_SUCCESS;
goto failure;
}
result = dns_db_findrdataset(db, node, version, dns_rdatatype_dnskey,
dns_rdatatype_none, 0, &dnskey, NULL);
if (result == ISC_R_NOTFOUND) {
if (dns_rdataset_isassociated(&cds)) {
result = DNS_R_BADCDS;
} else {
result = DNS_R_BADCDNSKEY;
}
goto failure;
}
if (result != ISC_R_SUCCESS) {
goto failure;
}
/*
* For each DNSSEC algorithm in the CDS RRset there must be
* a matching DNSKEY record with the exception of a CDS deletion
* record which must be by itself.
*/
if (dns_rdataset_isassociated(&cds)) {
bool delete = false;
memset(algorithms, notexpected, sizeof(algorithms));
for (result = dns_rdataset_first(&cds);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&cds)) {
dns_rdata_t crdata = DNS_RDATA_INIT;
dns_rdata_cds_t structcds;
dns_rdataset_current(&cds, &crdata);
/*
* CDS deletion record has this form "0 0 0 00" which
* is 5 zero octets.
*/
if (crdata.length == 5U &&
memcmp(crdata.data,
(unsigned char[5]){ 0, 0, 0, 0, 0 }, 5) == 0)
{
delete = true;
continue;
}
CHECK(dns_rdata_tostruct(&crdata, &structcds, NULL));
if (algorithms[structcds.algorithm] == 0) {
algorithms[structcds.algorithm] = expected;
}
for (result = dns_rdataset_first(&dnskey);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&dnskey)) {
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdata_t dsrdata = DNS_RDATA_INIT;
dns_rdataset_current(&dnskey, &rdata);
CHECK(dns_ds_buildrdata(&zone->origin, &rdata,
structcds.digest_type,
buffer, &dsrdata));
if (crdata.length == dsrdata.length &&
memcmp(crdata.data, dsrdata.data,
dsrdata.length) == 0)
{
algorithms[structcds.algorithm] = found;
}
}
if (result != ISC_R_NOMORE) {
goto failure;
}
}
for (i = 0; i < sizeof(algorithms); i++) {
if (delete) {
if (algorithms[i] != notexpected) {
result = DNS_R_BADCDS;
goto failure;
}
} else if (algorithms[i] == expected) {
result = DNS_R_BADCDS;
goto failure;
}
}
}
/*
* For each DNSSEC algorithm in the CDNSKEY RRset there must be
* a matching DNSKEY record with the exception of a CDNSKEY deletion
* record which must be by itself.
*/
if (dns_rdataset_isassociated(&cdnskey)) {
bool delete = false;
memset(algorithms, notexpected, sizeof(algorithms));
for (result = dns_rdataset_first(&cdnskey);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&cdnskey)) {
dns_rdata_t crdata = DNS_RDATA_INIT;
dns_rdata_cdnskey_t structcdnskey;
dns_rdataset_current(&cdnskey, &crdata);
/*
* CDNSKEY deletion record has this form
* "0 3 0 AA==" which is 2 zero octets, a 3,
* and 2 zero octets.
*/
if (crdata.length == 5U &&
memcmp(crdata.data,
(unsigned char[5]){ 0, 0, 3, 0, 0 }, 5) == 0)
{
delete = true;
continue;
}
CHECK(dns_rdata_tostruct(&crdata, &structcdnskey,
NULL));
if (algorithms[structcdnskey.algorithm] == 0) {
algorithms[structcdnskey.algorithm] = expected;
}
for (result = dns_rdataset_first(&dnskey);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&dnskey)) {
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_current(&dnskey, &rdata);
if (crdata.length == rdata.length &&
memcmp(crdata.data, rdata.data,
rdata.length) == 0)
{
algorithms[structcdnskey.algorithm] =
found;
}
}
if (result != ISC_R_NOMORE) {
goto failure;
}
}
for (i = 0; i < sizeof(algorithms); i++) {
if (delete) {
if (algorithms[i] != notexpected) {
result = DNS_R_BADCDNSKEY;
goto failure;
}
} else if (algorithms[i] == expected) {
result = DNS_R_BADCDNSKEY;
goto failure;
}
}
}
result = ISC_R_SUCCESS;
failure:
if (dns_rdataset_isassociated(&cds)) {
dns_rdataset_disassociate(&cds);
}
if (dns_rdataset_isassociated(&dnskey)) {
dns_rdataset_disassociate(&dnskey);
}
if (dns_rdataset_isassociated(&cdnskey)) {
dns_rdataset_disassociate(&cdnskey);
}
dns_db_detachnode(db, &node);
return (result);
}
void
dns_zone_setautomatic(dns_zone_t *zone, bool automatic) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->automatic = automatic;
UNLOCK_ZONE(zone);
}
bool
dns_zone_getautomatic(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->automatic);
}
void
dns_zone_setadded(dns_zone_t *zone, bool added) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->added = added;
UNLOCK_ZONE(zone);
}
bool
dns_zone_getadded(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->added);
}
isc_result_t
dns_zone_dlzpostload(dns_zone_t *zone, dns_db_t *db)
{
isc_time_t loadtime;
isc_result_t result;
dns_zone_t *secure = NULL;
TIME_NOW(&loadtime);
/*
* Lock hierarchy: zmgr, zone, raw.
*/
again:
LOCK_ZONE(zone);
INSIST(zone != zone->raw);
if (inline_secure(zone))
LOCK_ZONE(zone->raw);
else if (inline_raw(zone)) {
secure = zone->secure;
TRYLOCK_ZONE(result, secure);
if (result != ISC_R_SUCCESS) {
UNLOCK_ZONE(zone);
secure = NULL;
#if ISC_PLATFORM_USETHREADS
isc_thread_yield();
#endif
goto again;
}
}
result = zone_postload(zone, db, loadtime, ISC_R_SUCCESS);
if (inline_secure(zone))
UNLOCK_ZONE(zone->raw);
else if (secure != NULL)
UNLOCK_ZONE(secure);
UNLOCK_ZONE(zone);
return result;
}
isc_result_t
dns_zone_setrefreshkeyinterval(dns_zone_t *zone, uint32_t interval) {
REQUIRE(DNS_ZONE_VALID(zone));
if (interval == 0)
return (ISC_R_RANGE);
/* Maximum value: 24 hours (3600 minutes) */
if (interval > (24 * 60))
interval = (24 * 60);
/* Multiply by 60 for seconds */
zone->refreshkeyinterval = interval * 60;
return (ISC_R_SUCCESS);
}
void
dns_zone_setrequestixfr(dns_zone_t *zone, bool flag) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->requestixfr = flag;
}
bool
dns_zone_getrequestixfr(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->requestixfr);
}
void
dns_zone_setrequestexpire(dns_zone_t *zone, bool flag) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->requestexpire = flag;
}
bool
dns_zone_getrequestexpire(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->requestexpire);
}
void
dns_zone_setserialupdatemethod(dns_zone_t *zone, dns_updatemethod_t method) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->updatemethod = method;
}
dns_updatemethod_t
dns_zone_getserialupdatemethod(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return(zone->updatemethod);
}
/*
* Lock hierarchy: zmgr, zone, raw.
*/
isc_result_t
dns_zone_link(dns_zone_t *zone, dns_zone_t *raw) {
isc_result_t result;
dns_zonemgr_t *zmgr;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(zone->zmgr != NULL);
REQUIRE(zone->task != NULL);
REQUIRE(zone->loadtask != NULL);
REQUIRE(zone->raw == NULL);
REQUIRE(DNS_ZONE_VALID(raw));
REQUIRE(raw->zmgr == NULL);
REQUIRE(raw->task == NULL);
REQUIRE(raw->loadtask == NULL);
REQUIRE(raw->secure == NULL);
REQUIRE(zone != raw);
/*
* Lock hierarchy: zmgr, zone, raw.
*/
zmgr = zone->zmgr;
RWLOCK(&zmgr->rwlock, isc_rwlocktype_write);
LOCK_ZONE(zone);
LOCK_ZONE(raw);
result = isc_timer_create(zmgr->timermgr, isc_timertype_inactive,
NULL, NULL, zone->task, zone_timer, raw,
&raw->timer);
if (result != ISC_R_SUCCESS)
goto unlock;
/*
* The timer "holds" a iref.
*/
raw->irefs++;
INSIST(raw->irefs != 0);
/* dns_zone_attach(raw, &zone->raw); */
isc_refcount_increment(&raw->erefs, NULL);
zone->raw = raw;
/* dns_zone_iattach(zone, &raw->secure); */
zone_iattach(zone, &raw->secure);
isc_task_attach(zone->task, &raw->task);
isc_task_attach(zone->loadtask, &raw->loadtask);
ISC_LIST_APPEND(zmgr->zones, raw, link);
raw->zmgr = zmgr;
zmgr->refs++;
unlock:
UNLOCK_ZONE(raw);
UNLOCK_ZONE(zone);
RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_write);
return (result);
}
void
dns_zone_getraw(dns_zone_t *zone, dns_zone_t **raw) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(raw != NULL && *raw == NULL);
LOCK(&zone->lock);
INSIST(zone != zone->raw);
if (zone->raw != NULL)
dns_zone_attach(zone->raw, raw);
UNLOCK(&zone->lock);
}
struct keydone {
isc_event_t event;
bool all;
unsigned char data[5];
};
#define PENDINGFLAGS (DNS_NSEC3FLAG_CREATE|DNS_NSEC3FLAG_INITIAL)
static void
keydone(isc_task_t *task, isc_event_t *event) {
const char *me = "keydone";
bool commit = false;
isc_result_t result;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_dbversion_t *oldver = NULL, *newver = NULL;
dns_zone_t *zone;
dns_db_t *db = NULL;
dns_dbnode_t *node = NULL;
dns_rdataset_t rdataset;
dns_diff_t diff;
struct keydone *kd = (struct keydone *)event;
dns_update_log_t log = { update_log_cb, NULL };
bool clear_pending = false;
UNUSED(task);
zone = event->ev_arg;
INSIST(DNS_ZONE_VALID(zone));
ENTER;
dns_rdataset_init(&rdataset);
dns_diff_init(zone->mctx, &diff);
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL)
dns_db_attach(zone->db, &db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
if (db == NULL)
goto failure;
dns_db_currentversion(db, &oldver);
result = dns_db_newversion(db, &newver);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"keydone:dns_db_newversion -> %s",
dns_result_totext(result));
goto failure;
}
result = dns_db_getoriginnode(db, &node);
if (result != ISC_R_SUCCESS)
goto failure;
result = dns_db_findrdataset(db, node, newver, zone->privatetype,
dns_rdatatype_none, 0, &rdataset, NULL);
if (result == ISC_R_NOTFOUND) {
INSIST(!dns_rdataset_isassociated(&rdataset));
goto failure;
}
if (result != ISC_R_SUCCESS) {
INSIST(!dns_rdataset_isassociated(&rdataset));
goto failure;
}
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset)) {
bool found = false;
dns_rdataset_current(&rdataset, &rdata);
if (kd->all) {
if (rdata.length == 5 && rdata.data[0] != 0 &&
rdata.data[3] == 0 && rdata.data[4] == 1)
found = true;
else if (rdata.data[0] == 0 &&
(rdata.data[2] & PENDINGFLAGS) != 0) {
found = true;
clear_pending = true;
}
} else if (rdata.length == 5 &&
memcmp(rdata.data, kd->data, 5) == 0)
found = true;
if (found)
CHECK(update_one_rr(db, newver, &diff, DNS_DIFFOP_DEL,
&zone->origin, rdataset.ttl,
&rdata));
dns_rdata_reset(&rdata);
}
if (!ISC_LIST_EMPTY(diff.tuples)) {
/* Write changes to journal file. */
CHECK(update_soa_serial(db, newver, &diff, zone->mctx,
zone->updatemethod));
result = dns_update_signatures(&log, zone, db,
oldver, newver, &diff,
zone->sigvalidityinterval);
if (!clear_pending)
CHECK(result);
CHECK(zone_journal(zone, &diff, NULL, "keydone"));
commit = true;
LOCK_ZONE(zone);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_LOADED|
DNS_ZONEFLG_NEEDNOTIFY);
zone_needdump(zone, 30);
UNLOCK_ZONE(zone);
}
failure:
if (dns_rdataset_isassociated(&rdataset))
dns_rdataset_disassociate(&rdataset);
if (db != NULL) {
if (node != NULL)
dns_db_detachnode(db, &node);
if (oldver != NULL)
dns_db_closeversion(db, &oldver, false);
if (newver != NULL)
dns_db_closeversion(db, &newver, commit);
dns_db_detach(&db);
}
dns_diff_clear(&diff);
isc_event_free(&event);
dns_zone_idetach(&zone);
INSIST(oldver == NULL);
INSIST(newver == NULL);
}
isc_result_t
dns_zone_keydone(dns_zone_t *zone, const char *keystr) {
isc_result_t result = ISC_R_SUCCESS;
isc_event_t *e;
isc_buffer_t b;
dns_zone_t *dummy = NULL;
struct keydone *kd;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
e = isc_event_allocate(zone->mctx, zone, DNS_EVENT_KEYDONE, keydone,
zone, sizeof(struct keydone));
if (e == NULL) {
result = ISC_R_NOMEMORY;
goto failure;
}
kd = (struct keydone *) e;
if (strcasecmp(keystr, "all") == 0)
kd->all = true;
else {
isc_textregion_t r;
const char *algstr;
dns_keytag_t keyid;
dns_secalg_t alg;
size_t n;
kd->all = false;
n = sscanf(keystr, "%hu/", &keyid);
if (n == 0U)
CHECK(ISC_R_FAILURE);
algstr = strchr(keystr, '/');
if (algstr != NULL)
algstr++;
else
CHECK(ISC_R_FAILURE);
n = sscanf(algstr, "%hhu", &alg);
if (n == 0U) {
DE_CONST(algstr, r.base);
r.length = strlen(algstr);
CHECK(dns_secalg_fromtext(&alg, &r));
}
/* construct a private-type rdata */
isc_buffer_init(&b, kd->data, sizeof(kd->data));
isc_buffer_putuint8(&b, alg);
isc_buffer_putuint8(&b, (keyid & 0xff00) >> 8);
isc_buffer_putuint8(&b, (keyid & 0xff));
isc_buffer_putuint8(&b, 0);
isc_buffer_putuint8(&b, 1);
}
zone_iattach(zone, &dummy);
isc_task_send(zone->task, &e);
failure:
if (e != NULL)
isc_event_free(&e);
UNLOCK_ZONE(zone);
return (result);
}
/*
* Called from the zone task's queue after the relevant event is posted by
* dns_zone_setnsec3param().
*/
static void
setnsec3param(isc_task_t *task, isc_event_t *event) {
const char *me = "setnsec3param";
dns_zone_t *zone = event->ev_arg;
INSIST(DNS_ZONE_VALID(zone));
UNUSED(task);
ENTER;
/*
* If receive_secure_serial is still processing or we have a
* queued event append rss_post queue.
*/
if (zone->rss_newver != NULL ||
ISC_LIST_HEAD(zone->rss_post) != NULL)
{
/*
* Wait for receive_secure_serial() to finish processing.
*/
ISC_LIST_APPEND(zone->rss_post, event, ev_link);
} else {
rss_post(zone, event);
}
dns_zone_idetach(&zone);
}
/*
* Check whether NSEC3 chain addition or removal specified by the private-type
* record passed with the event was already queued (or even fully performed).
* If not, modify the relevant private-type records at the zone apex and call
* resume_addnsec3chain().
*/
static void
rss_post(dns_zone_t *zone, isc_event_t *event) {
const char *me = "rss_post";
bool commit = false;
isc_result_t result;
dns_dbversion_t *oldver = NULL, *newver = NULL;
dns_db_t *db = NULL;
dns_dbnode_t *node = NULL;
dns_rdataset_t prdataset, nrdataset;
dns_diff_t diff;
struct np3event *npe = (struct np3event *)event;
nsec3param_t *np;
dns_update_log_t log = { update_log_cb, NULL };
dns_rdata_t rdata;
bool nseconly;
bool exists = false;
ENTER;
np = &npe->params;
dns_rdataset_init(&prdataset);
dns_rdataset_init(&nrdataset);
dns_diff_init(zone->mctx, &diff);
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL)
dns_db_attach(zone->db, &db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
if (db == NULL)
goto failure;
dns_db_currentversion(db, &oldver);
result = dns_db_newversion(db, &newver);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"setnsec3param:dns_db_newversion -> %s",
dns_result_totext(result));
goto failure;
}
CHECK(dns_db_getoriginnode(db, &node));
/*
* Does a private-type record already exist for this chain?
*/
result = dns_db_findrdataset(db, node, newver, zone->privatetype,
dns_rdatatype_none, 0, &prdataset, NULL);
if (result == ISC_R_SUCCESS) {
for (result = dns_rdataset_first(&prdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&prdataset)) {
dns_rdata_init(&rdata);
dns_rdataset_current(&prdataset, &rdata);
if (np->length == rdata.length &&
memcmp(rdata.data, np->data, np->length) == 0) {
exists = true;
break;
}
}
} else if (result != ISC_R_NOTFOUND) {
INSIST(!dns_rdataset_isassociated(&prdataset));
goto failure;
}
/*
* Does the chain already exist?
*/
result = dns_db_findrdataset(db, node, newver,
dns_rdatatype_nsec3param,
dns_rdatatype_none, 0, &nrdataset, NULL);
if (result == ISC_R_SUCCESS) {
for (result = dns_rdataset_first(&nrdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&nrdataset)) {
dns_rdata_init(&rdata);
dns_rdataset_current(&nrdataset, &rdata);
if (np->length == (rdata.length + 1) &&
memcmp(rdata.data, np->data + 1,
np->length - 1) == 0)
{
exists = true;
break;
}
}
} else if (result != ISC_R_NOTFOUND) {
INSIST(!dns_rdataset_isassociated(&nrdataset));
goto failure;
}
/*
* We need to remove any existing NSEC3 chains if the supplied NSEC3
* parameters are supposed to replace the current ones or if we are
* switching to NSEC.
*/
if (!exists && np->replace && (np->length != 0 || np->nsec))
CHECK(dns_nsec3param_deletechains(db, newver, zone,
!np->nsec, &diff));
if (!exists && np->length != 0) {
/*
* We're creating an NSEC3 chain. Add the private-type record
* passed in the event handler's argument to the zone apex.
*
* If the zone is not currently capable of supporting an NSEC3
* chain (due to the DNSKEY RRset at the zone apex not existing
* or containing at least one key using an NSEC-only
* algorithm), add the INITIAL flag, so these parameters can be
* used later when NSEC3 becomes available.
*/
dns_rdata_init(&rdata);
np->data[2] |= DNS_NSEC3FLAG_CREATE;
result = dns_nsec_nseconly(db, newver, &nseconly);
if (result == ISC_R_NOTFOUND || nseconly)
np->data[2] |= DNS_NSEC3FLAG_INITIAL;
rdata.length = np->length;
rdata.data = np->data;
rdata.type = zone->privatetype;
rdata.rdclass = zone->rdclass;
CHECK(update_one_rr(db, newver, &diff, DNS_DIFFOP_ADD,
&zone->origin, 0, &rdata));
}
/*
* If we changed anything in the zone, write changes to journal file
* and set commit to true so that resume_addnsec3chain() will be
* called below in order to kick off adding/removing relevant NSEC3
* records.
*/
if (!ISC_LIST_EMPTY(diff.tuples)) {
CHECK(update_soa_serial(db, newver, &diff, zone->mctx,
zone->updatemethod));
result = dns_update_signatures(&log, zone, db,
oldver, newver, &diff,
zone->sigvalidityinterval);
if (result != ISC_R_NOTFOUND)
CHECK(result);
CHECK(zone_journal(zone, &diff, NULL, "setnsec3param"));
commit = true;
LOCK_ZONE(zone);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_LOADED);
zone_needdump(zone, 30);
UNLOCK_ZONE(zone);
}
failure:
if (dns_rdataset_isassociated(&prdataset))
dns_rdataset_disassociate(&prdataset);
if (dns_rdataset_isassociated(&nrdataset))
dns_rdataset_disassociate(&nrdataset);
if (node != NULL)
dns_db_detachnode(db, &node);
if (oldver != NULL)
dns_db_closeversion(db, &oldver, false);
if (newver != NULL)
dns_db_closeversion(db, &newver, commit);
if (db != NULL)
dns_db_detach(&db);
if (commit) {
LOCK_ZONE(zone);
resume_addnsec3chain(zone);
UNLOCK_ZONE(zone);
}
dns_diff_clear(&diff);
isc_event_free(&event);
INSIST(oldver == NULL);
INSIST(newver == NULL);
}
/*
* Called when an "rndc signing -nsec3param ..." command is received.
*
* Allocate and prepare an nsec3param_t structure which holds information about
* the NSEC3 changes requested for the zone:
*
* - if NSEC3 is to be disabled ("-nsec3param none"), only set the "nsec"
* field of the structure to true and the "replace" field to the value
* of the "replace" argument, leaving other fields initialized to zeros, to
* signal that the zone should be signed using NSEC instead of NSEC3,
*
* - otherwise, prepare NSEC3PARAM RDATA that will eventually be inserted at
* the zone apex, convert it to a private-type record and store the latter
* in the "data" field of the nsec3param_t structure.
*
* Once the nsec3param_t structure is prepared, post an event to the zone's
* task which will cause setnsec3param() to be called with the prepared
* structure passed as an argument.
*/
isc_result_t
dns_zone_setnsec3param(dns_zone_t *zone, uint8_t hash, uint8_t flags,
uint16_t iter, uint8_t saltlen,
unsigned char *salt, bool replace)
{
isc_result_t result = ISC_R_SUCCESS;
dns_rdata_nsec3param_t param;
dns_rdata_t nrdata = DNS_RDATA_INIT;
dns_rdata_t prdata = DNS_RDATA_INIT;
unsigned char nbuf[DNS_NSEC3PARAM_BUFFERSIZE];
struct np3event *npe;
nsec3param_t *np;
dns_zone_t *dummy = NULL;
isc_buffer_t b;
isc_event_t *e;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(salt != NULL);
LOCK_ZONE(zone);
e = isc_event_allocate(zone->mctx, zone, DNS_EVENT_SETNSEC3PARAM,
setnsec3param, zone, sizeof(struct np3event));
if (e == NULL) {
result = ISC_R_NOMEMORY;
goto failure;
}
npe = (struct np3event *) e;
np = &npe->params;
np->replace = replace;
if (hash == 0) {
np->length = 0;
np->nsec = true;
} else {
param.common.rdclass = zone->rdclass;
param.common.rdtype = dns_rdatatype_nsec3param;
ISC_LINK_INIT(¶m.common, link);
param.mctx = NULL;
param.hash = hash;
param.flags = flags;
param.iterations = iter;
param.salt_length = saltlen;
param.salt = salt;
isc_buffer_init(&b, nbuf, sizeof(nbuf));
CHECK(dns_rdata_fromstruct(&nrdata, zone->rdclass,
dns_rdatatype_nsec3param,
¶m, &b));
dns_nsec3param_toprivate(&nrdata, &prdata, zone->privatetype,
np->data, sizeof(np->data));
np->length = prdata.length;
np->nsec = false;
}
/*
* setnsec3param() will silently return early if the zone does not yet
* have a database. Prevent that by queueing the event up if zone->db
* is NULL. All events queued here are subsequently processed by
* receive_secure_db() if it ever gets called or simply freed by
* zone_free() otherwise.
*/
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL) {
zone_iattach(zone, &dummy);
isc_task_send(zone->task, &e);
} else {
ISC_LIST_APPEND(zone->setnsec3param_queue, e, ev_link);
e = NULL;
}
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
failure:
if (e != NULL)
isc_event_free(&e);
UNLOCK_ZONE(zone);
return (result);
}
isc_result_t
dns_zone_getloadtime(dns_zone_t *zone, isc_time_t *loadtime) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(loadtime != NULL);
LOCK_ZONE(zone);
*loadtime = zone->loadtime;
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_result_t
dns_zone_getexpiretime(dns_zone_t *zone, isc_time_t *expiretime) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(expiretime != NULL);
LOCK_ZONE(zone);
*expiretime = zone->expiretime;
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_result_t
dns_zone_getrefreshtime(dns_zone_t *zone, isc_time_t *refreshtime) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(refreshtime != NULL);
LOCK_ZONE(zone);
*refreshtime = zone->refreshtime;
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_result_t
dns_zone_getrefreshkeytime(dns_zone_t *zone, isc_time_t *refreshkeytime) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(refreshkeytime != NULL);
LOCK_ZONE(zone);
*refreshkeytime = zone->refreshkeytime;
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
unsigned int
dns_zone_getincludes(dns_zone_t *zone, char ***includesp) {
dns_include_t *include;
char **array = NULL;
unsigned int n = 0;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(includesp != NULL && *includesp == NULL);
LOCK_ZONE(zone);
if (zone->nincludes == 0)
goto done;
array = isc_mem_allocate(zone->mctx, sizeof(char *) * zone->nincludes);
if (array == NULL)
goto done;
for (include = ISC_LIST_HEAD(zone->includes);
include != NULL;
include = ISC_LIST_NEXT(include, link)) {
INSIST(n < zone->nincludes);
array[n++] = isc_mem_strdup(zone->mctx, include->name);
}
INSIST(n == zone->nincludes);
*includesp = array;
done:
UNLOCK_ZONE(zone);
return (n);
}
void
dns_zone_setstatlevel(dns_zone_t *zone, dns_zonestat_level_t level) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->statlevel = level;
}
dns_zonestat_level_t
dns_zone_getstatlevel(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->statlevel);
}
static void
setserial(isc_task_t *task, isc_event_t *event) {
uint32_t oldserial, desired;
const char *me = "setserial";
bool commit = false;
isc_result_t result;
dns_dbversion_t *oldver = NULL, *newver = NULL;
dns_zone_t *zone;
dns_db_t *db = NULL;
dns_diff_t diff;
struct ssevent *sse = (struct ssevent *)event;
dns_update_log_t log = { update_log_cb, NULL };
dns_difftuple_t *oldtuple = NULL, *newtuple = NULL;
UNUSED(task);
zone = event->ev_arg;
INSIST(DNS_ZONE_VALID(zone));
ENTER;
if (zone->update_disabled)
goto failure;
desired = sse->serial;
dns_diff_init(zone->mctx, &diff);
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL)
dns_db_attach(zone->db, &db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
if (db == NULL)
goto failure;
dns_db_currentversion(db, &oldver);
result = dns_db_newversion(db, &newver);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"setserial:dns_db_newversion -> %s",
dns_result_totext(result));
goto failure;
}
CHECK(dns_db_createsoatuple(db, oldver, diff.mctx,
DNS_DIFFOP_DEL, &oldtuple));
CHECK(dns_difftuple_copy(oldtuple, &newtuple));
newtuple->op = DNS_DIFFOP_ADD;
oldserial = dns_soa_getserial(&oldtuple->rdata);
if (desired == 0U)
desired = 1;
if (!isc_serial_gt(desired, oldserial)) {
if (desired != oldserial)
dns_zone_log(zone, ISC_LOG_INFO,
"setserial: desired serial (%u) "
"out of range (%u-%u)", desired,
oldserial + 1, (oldserial + 0x7fffffff));
goto failure;
}
dns_soa_setserial(desired, &newtuple->rdata);
CHECK(do_one_tuple(&oldtuple, db, newver, &diff));
CHECK(do_one_tuple(&newtuple, db, newver, &diff));
result = dns_update_signatures(&log, zone, db,
oldver, newver, &diff,
zone->sigvalidityinterval);
if (result != ISC_R_NOTFOUND)
CHECK(result);
/* Write changes to journal file. */
CHECK(zone_journal(zone, &diff, NULL, "setserial"));
commit = true;
LOCK_ZONE(zone);
zone_needdump(zone, 30);
UNLOCK_ZONE(zone);
failure:
if (oldtuple != NULL)
dns_difftuple_free(&oldtuple);
if (newtuple != NULL)
dns_difftuple_free(&newtuple);
if (oldver != NULL)
dns_db_closeversion(db, &oldver, false);
if (newver != NULL)
dns_db_closeversion(db, &newver, commit);
if (db != NULL)
dns_db_detach(&db);
dns_diff_clear(&diff);
isc_event_free(&event);
dns_zone_idetach(&zone);
INSIST(oldver == NULL);
INSIST(newver == NULL);
}
isc_result_t
dns_zone_setserial(dns_zone_t *zone, uint32_t serial) {
isc_result_t result = ISC_R_SUCCESS;
dns_zone_t *dummy = NULL;
isc_event_t *e = NULL;
struct ssevent *sse;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (!inline_secure(zone)) {
if (!dns_zone_isdynamic(zone, true)) {
result = DNS_R_NOTDYNAMIC;
goto failure;
}
}
if (zone->update_disabled) {
result = DNS_R_FROZEN;
goto failure;
}
e = isc_event_allocate(zone->mctx, zone, DNS_EVENT_SETSERIAL,
setserial, zone, sizeof(struct ssevent));
if (e == NULL) {
result = ISC_R_NOMEMORY;
goto failure;
}
sse = (struct ssevent *)e;
sse->serial = serial;
zone_iattach(zone, &dummy);
isc_task_send(zone->task, &e);
failure:
if (e != NULL)
isc_event_free(&e);
UNLOCK_ZONE(zone);
return (result);
}