/*
* 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 <ctype.h>
#include <inttypes.h>
#include <isc/base64.h>
#include <isc/hex.h>
#include <isc/lex.h>
#include <isc/mem.h>
#include <isc/parseint.h>
#include <isc/print.h>
#include <isc/string.h>
#include <isc/stdlib.h>
#include <isc/util.h>
#include <dns/callbacks.h>
#include <dns/cert.h>
#include <dns/compress.h>
#include <dns/dsdigest.h>
#include <dns/enumtype.h>
#include <dns/keyflags.h>
#include <dns/keyvalues.h>
#include <dns/message.h>
#include <dns/rcode.h>
#include <dns/rdata.h>
#include <dns/rdataclass.h>
#include <dns/rdatastruct.h>
#include <dns/rdatatype.h>
#include <dns/result.h>
#include <dns/secalg.h>
#include <dns/secproto.h>
#include <dns/time.h>
#include <dns/ttl.h>
#define RETERR(x) \
do { \
isc_result_t _r = (x); \
if (_r != ISC_R_SUCCESS) \
return (_r); \
} while (0)
#define RETTOK(x) \
do { \
isc_result_t _r = (x); \
if (_r != ISC_R_SUCCESS) { \
isc_lex_ungettoken(lexer, &token); \
return (_r); \
} \
} while (0)
#define CHECK(op) \
do { result = (op); \
if (result != ISC_R_SUCCESS) goto cleanup; \
} while (0)
#define CHECKTOK(op) \
do { result = (op); \
if (result != ISC_R_SUCCESS) { \
isc_lex_ungettoken(lexer, &token); \
goto cleanup; \
} \
} while (0)
#define DNS_AS_STR(t) ((t).value.as_textregion.base)
#define ARGS_FROMTEXT int rdclass, dns_rdatatype_t type, \
isc_lex_t *lexer, dns_name_t *origin, \
unsigned int options, isc_buffer_t *target, \
dns_rdatacallbacks_t *callbacks
#define ARGS_TOTEXT dns_rdata_t *rdata, dns_rdata_textctx_t *tctx, \
isc_buffer_t *target
#define ARGS_FROMWIRE int rdclass, dns_rdatatype_t type, \
isc_buffer_t *source, dns_decompress_t *dctx, \
unsigned int options, isc_buffer_t *target
#define ARGS_TOWIRE dns_rdata_t *rdata, dns_compress_t *cctx, \
isc_buffer_t *target
#define ARGS_COMPARE const dns_rdata_t *rdata1, const dns_rdata_t *rdata2
#define ARGS_FROMSTRUCT int rdclass, dns_rdatatype_t type, \
void *source, isc_buffer_t *target
#define ARGS_TOSTRUCT const dns_rdata_t *rdata, void *target, isc_mem_t *mctx
#define ARGS_FREESTRUCT void *source
#define ARGS_ADDLDATA dns_rdata_t *rdata, dns_additionaldatafunc_t add, \
void *arg
#define ARGS_DIGEST dns_rdata_t *rdata, dns_digestfunc_t digest, void *arg
#define ARGS_CHECKOWNER dns_name_t *name, dns_rdataclass_t rdclass, \
dns_rdatatype_t type, bool wildcard
#define ARGS_CHECKNAMES dns_rdata_t *rdata, dns_name_t *owner, dns_name_t *bad
/*%
* Context structure for the totext_ functions.
* Contains formatting options for rdata-to-text
* conversion.
*/
typedef struct dns_rdata_textctx {
dns_name_t *origin; /*%< Current origin, or NULL. */
unsigned int flags; /*%< DNS_STYLEFLAG_* */
unsigned int width; /*%< Width of rdata column. */
const char *linebreak; /*%< Line break string. */
} dns_rdata_textctx_t;
static isc_result_t
txt_totext(isc_region_t *source, bool quote, isc_buffer_t *target);
static isc_result_t
txt_fromtext(isc_textregion_t *source, isc_buffer_t *target);
static isc_result_t
txt_fromwire(isc_buffer_t *source, isc_buffer_t *target);
static isc_result_t
multitxt_totext(isc_region_t *source, isc_buffer_t *target);
static isc_result_t
multitxt_fromtext(isc_textregion_t *source, isc_buffer_t *target);
static bool
name_prefix(dns_name_t *name, dns_name_t *origin, dns_name_t *target);
static unsigned int
name_length(dns_name_t *name);
static isc_result_t
str_totext(const char *source, isc_buffer_t *target);
static isc_result_t
inet_totext(int af, isc_region_t *src, isc_buffer_t *target);
static bool
buffer_empty(isc_buffer_t *source);
static void
buffer_fromregion(isc_buffer_t *buffer, isc_region_t *region);
static isc_result_t
uint32_tobuffer(uint32_t, isc_buffer_t *target);
static isc_result_t
uint16_tobuffer(uint32_t, isc_buffer_t *target);
static isc_result_t
uint8_tobuffer(uint32_t, isc_buffer_t *target);
static isc_result_t
name_tobuffer(dns_name_t *name, isc_buffer_t *target);
static uint32_t
uint32_fromregion(isc_region_t *region);
static uint16_t
uint16_fromregion(isc_region_t *region);
static uint8_t
uint8_fromregion(isc_region_t *region);
static uint8_t
uint8_consume_fromregion(isc_region_t *region);
static isc_result_t
mem_tobuffer(isc_buffer_t *target, void *base, unsigned int length);
static int
hexvalue(char value);
static int
decvalue(char value);
static void
default_fromtext_callback(dns_rdatacallbacks_t *callbacks, const char *, ...)
ISC_FORMAT_PRINTF(2, 3);
static void
fromtext_error(void (*callback)(dns_rdatacallbacks_t *, const char *, ...),
dns_rdatacallbacks_t *callbacks, const char *name,
unsigned long line, isc_token_t *token, isc_result_t result);
static void
fromtext_warneof(isc_lex_t *lexer, dns_rdatacallbacks_t *callbacks);
static isc_result_t
rdata_totext(dns_rdata_t *rdata, dns_rdata_textctx_t *tctx,
isc_buffer_t *target);
static void
warn_badname(dns_name_t *name, isc_lex_t *lexer,
dns_rdatacallbacks_t *callbacks);
static void
warn_badmx(isc_token_t *token, isc_lex_t *lexer,
dns_rdatacallbacks_t *callbacks);
static uint16_t
uint16_consume_fromregion(isc_region_t *region);
static isc_result_t
unknown_totext(dns_rdata_t *rdata, dns_rdata_textctx_t *tctx,
isc_buffer_t *target);
static inline isc_result_t
generic_fromtext_key(ARGS_FROMTEXT);
static inline isc_result_t
generic_totext_key(ARGS_TOTEXT);
static inline isc_result_t
generic_fromwire_key(ARGS_FROMWIRE);
static inline isc_result_t
generic_fromstruct_key(ARGS_FROMSTRUCT);
static inline isc_result_t
generic_tostruct_key(ARGS_TOSTRUCT);
static inline void
generic_freestruct_key(ARGS_FREESTRUCT);
static isc_result_t
generic_fromtext_txt(ARGS_FROMTEXT);
static isc_result_t
generic_totext_txt(ARGS_TOTEXT);
static isc_result_t
generic_fromwire_txt(ARGS_FROMWIRE);
static isc_result_t
generic_fromstruct_txt(ARGS_FROMSTRUCT);
static isc_result_t
generic_tostruct_txt(ARGS_TOSTRUCT);
static void
generic_freestruct_txt(ARGS_FREESTRUCT);
static isc_result_t
generic_txt_first(dns_rdata_txt_t *txt);
static isc_result_t
generic_txt_next(dns_rdata_txt_t *txt);
static isc_result_t
generic_txt_current(dns_rdata_txt_t *txt, dns_rdata_txt_string_t *string);
static isc_result_t
generic_totext_ds(ARGS_TOTEXT);
static isc_result_t
generic_tostruct_ds(ARGS_TOSTRUCT);
static isc_result_t
generic_fromtext_ds(ARGS_FROMTEXT);
static isc_result_t
generic_fromwire_ds(ARGS_FROMWIRE);
static isc_result_t
generic_fromstruct_ds(ARGS_FROMSTRUCT);
static isc_result_t
generic_fromtext_tlsa(ARGS_FROMTEXT);
static isc_result_t
generic_totext_tlsa(ARGS_TOTEXT);
static isc_result_t
generic_fromwire_tlsa(ARGS_FROMWIRE);
static isc_result_t
generic_fromstruct_tlsa(ARGS_FROMSTRUCT);
static isc_result_t
generic_tostruct_tlsa(ARGS_TOSTRUCT);
static void
generic_freestruct_tlsa(ARGS_FREESTRUCT);
/*% INT16 Size */
#define NS_INT16SZ 2
/*% IPv6 Address Size */
#define NS_LOCATORSZ 8
/*
* Active Directory gc._msdcs.<forest> prefix.
*/
static unsigned char gc_msdcs_data[] = "\002gc\006_msdcs";
static unsigned char gc_msdcs_offset [] = { 0, 3 };
static dns_name_t const gc_msdcs =
DNS_NAME_INITNONABSOLUTE(gc_msdcs_data, gc_msdcs_offset);
/*%
* convert presentation level address to network order binary form.
* \return
* 1 if `src' is a valid [RFC1884 2.2] address, else 0.
* \note
* (1) does not touch `dst' unless it's returning 1.
*/
static inline int
locator_pton(const char *src, unsigned char *dst) {
static const char xdigits_l[] = "0123456789abcdef",
xdigits_u[] = "0123456789ABCDEF";
unsigned char tmp[NS_LOCATORSZ];
unsigned char *tp = tmp, *endp;
const char *xdigits;
int ch, seen_xdigits;
unsigned int val;
memset(tp, '\0', NS_LOCATORSZ);
endp = tp + NS_LOCATORSZ;
seen_xdigits = 0;
val = 0;
while ((ch = *src++) != '\0') {
const char *pch;
pch = strchr((xdigits = xdigits_l), ch);
if (pch == NULL)
pch = strchr((xdigits = xdigits_u), ch);
if (pch != NULL) {
val <<= 4;
val |= (pch - xdigits);
if (++seen_xdigits > 4)
return (0);
continue;
}
if (ch == ':') {
if (!seen_xdigits)
return (0);
if (tp + NS_INT16SZ > endp)
return (0);
*tp++ = (unsigned char) (val >> 8) & 0xff;
*tp++ = (unsigned char) val & 0xff;
seen_xdigits = 0;
val = 0;
continue;
}
return (0);
}
if (seen_xdigits) {
if (tp + NS_INT16SZ > endp)
return (0);
*tp++ = (unsigned char) (val >> 8) & 0xff;
*tp++ = (unsigned char) val & 0xff;
}
if (tp != endp)
return (0);
memmove(dst, tmp, NS_LOCATORSZ);
return (1);
}
static inline int
getquad(const void *src, struct in_addr *dst,
isc_lex_t *lexer, dns_rdatacallbacks_t *callbacks)
{
int result;
struct in_addr tmp;
result = inet_aton(src, dst);
if (result == 1 && callbacks != NULL &&
inet_pton(AF_INET, src, &tmp) != 1) {
const char *name = isc_lex_getsourcename(lexer);
if (name == NULL)
name = "UNKNOWN";
(*callbacks->warn)(callbacks, "%s:%lu: \"%s\" "
"is not a decimal dotted quad", name,
isc_lex_getsourceline(lexer), src);
}
return (result);
}
static inline isc_result_t
name_duporclone(dns_name_t *source, isc_mem_t *mctx, dns_name_t *target) {
if (mctx != NULL)
return (dns_name_dup(source, mctx, target));
dns_name_clone(source, target);
return (ISC_R_SUCCESS);
}
static inline void *
mem_maybedup(isc_mem_t *mctx, void *source, size_t length) {
void *copy;
if (mctx == NULL)
return (source);
copy = isc_mem_allocate(mctx, length);
if (copy != NULL)
memmove(copy, source, length);
return (copy);
}
static inline isc_result_t
typemap_fromtext(isc_lex_t *lexer, isc_buffer_t *target,
bool allow_empty)
{
isc_token_t token;
unsigned char bm[8*1024]; /* 64k bits */
dns_rdatatype_t covered, max_used;
int octet;
unsigned int max_octet, newend, end;
int window;
bool first = true;
max_used = 0;
bm[0] = 0;
end = 0;
do {
RETERR(isc_lex_getmastertoken(lexer, &token,
isc_tokentype_string, true));
if (token.type != isc_tokentype_string)
break;
RETTOK(dns_rdatatype_fromtext(&covered,
&token.value.as_textregion));
if (covered > max_used) {
newend = covered / 8;
if (newend > end) {
memset(&bm[end + 1], 0, newend - end);
end = newend;
}
max_used = covered;
}
bm[covered/8] |= (0x80>>(covered%8));
first = false;
} while (1);
isc_lex_ungettoken(lexer, &token);
if (!allow_empty && first)
return (DNS_R_FORMERR);
for (window = 0; window < 256 ; window++) {
if (max_used < window * 256)
break;
max_octet = max_used - (window * 256);
if (max_octet >= 256)
max_octet = 31;
else
max_octet /= 8;
/*
* Find if we have a type in this window.
*/
for (octet = max_octet; octet >= 0; octet--) {
if (bm[window * 32 + octet] != 0)
break;
}
if (octet < 0)
continue;
RETERR(uint8_tobuffer(window, target));
RETERR(uint8_tobuffer(octet + 1, target));
RETERR(mem_tobuffer(target, &bm[window * 32], octet + 1));
}
return (ISC_R_SUCCESS);
}
static inline isc_result_t
typemap_totext(isc_region_t *sr, dns_rdata_textctx_t *tctx,
isc_buffer_t *target)
{
unsigned int i, j, k;
unsigned int window, len;
bool first = true;
for (i = 0; i < sr->length; i += len) {
if (tctx != NULL &&
(tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0) {
RETERR(str_totext(tctx->linebreak, target));
first = true;
}
INSIST(i + 2 <= sr->length);
window = sr->base[i];
len = sr->base[i + 1];
INSIST(len > 0 && len <= 32);
i += 2;
INSIST(i + len <= sr->length);
for (j = 0; j < len; j++) {
dns_rdatatype_t t;
if (sr->base[i + j] == 0)
continue;
for (k = 0; k < 8; k++) {
if ((sr->base[i + j] & (0x80 >> k)) == 0)
continue;
t = window * 256 + j * 8 + k;
if (!first)
RETERR(str_totext(" ", target));
first = false;
if (dns_rdatatype_isknown(t)) {
RETERR(dns_rdatatype_totext(t, target));
} else {
char buf[sizeof("TYPE65535")];
snprintf(buf, sizeof(buf), "TYPE%u", t);
RETERR(str_totext(buf, target));
}
}
}
}
return (ISC_R_SUCCESS);
}
static isc_result_t
typemap_test(isc_region_t *sr, bool allow_empty) {
unsigned int window, lastwindow = 0;
unsigned int len;
bool first = true;
unsigned int i;
for (i = 0; i < sr->length; i += len) {
/*
* Check for overflow.
*/
if (i + 2 > sr->length)
RETERR(DNS_R_FORMERR);
window = sr->base[i];
len = sr->base[i + 1];
i += 2;
/*
* Check that bitmap windows are in the correct order.
*/
if (!first && window <= lastwindow)
RETERR(DNS_R_FORMERR);
/*
* Check for legal lengths.
*/
if (len < 1 || len > 32)
RETERR(DNS_R_FORMERR);
/*
* Check for overflow.
*/
if (i + len > sr->length)
RETERR(DNS_R_FORMERR);
/*
* The last octet of the bitmap must be non zero.
*/
if (sr->base[i + len - 1] == 0)
RETERR(DNS_R_FORMERR);
lastwindow = window;
first = false;
}
if (i != sr->length)
return (DNS_R_EXTRADATA);
if (!allow_empty && first)
RETERR(DNS_R_FORMERR);
return (ISC_R_SUCCESS);
}
static const char hexdigits[] = "0123456789abcdef";
static const char decdigits[] = "0123456789";
#include "code.h"
#define META 0x0001
#define RESERVED 0x0002
/***
*** Initialization
***/
void
dns_rdata_init(dns_rdata_t *rdata) {
REQUIRE(rdata != NULL);
rdata->data = NULL;
rdata->length = 0;
rdata->rdclass = 0;
rdata->type = 0;
rdata->flags = 0;
ISC_LINK_INIT(rdata, link);
/* ISC_LIST_INIT(rdata->list); */
}
void
dns_rdata_reset(dns_rdata_t *rdata) {
REQUIRE(rdata != NULL);
REQUIRE(!ISC_LINK_LINKED(rdata, link));
REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
rdata->data = NULL;
rdata->length = 0;
rdata->rdclass = 0;
rdata->type = 0;
rdata->flags = 0;
}
/***
***
***/
void
dns_rdata_clone(const dns_rdata_t *src, dns_rdata_t *target) {
REQUIRE(src != NULL);
REQUIRE(target != NULL);
REQUIRE(DNS_RDATA_INITIALIZED(target));
REQUIRE(DNS_RDATA_VALIDFLAGS(src));
REQUIRE(DNS_RDATA_VALIDFLAGS(target));
target->data = src->data;
target->length = src->length;
target->rdclass = src->rdclass;
target->type = src->type;
target->flags = src->flags;
}
/***
*** Comparisons
***/
int
dns_rdata_compare(const dns_rdata_t *rdata1, const dns_rdata_t *rdata2) {
int result = 0;
bool use_default = false;
REQUIRE(rdata1 != NULL);
REQUIRE(rdata2 != NULL);
REQUIRE(rdata1->length == 0 || rdata1->data != NULL);
REQUIRE(rdata2->length == 0 || rdata2->data != NULL);
REQUIRE(DNS_RDATA_VALIDFLAGS(rdata1));
REQUIRE(DNS_RDATA_VALIDFLAGS(rdata2));
if (rdata1->rdclass != rdata2->rdclass)
return (rdata1->rdclass < rdata2->rdclass ? -1 : 1);
if (rdata1->type != rdata2->type)
return (rdata1->type < rdata2->type ? -1 : 1);
COMPARESWITCH
if (use_default) {
isc_region_t r1;
isc_region_t r2;
dns_rdata_toregion(rdata1, &r1);
dns_rdata_toregion(rdata2, &r2);
result = isc_region_compare(&r1, &r2);
}
return (result);
}
int
dns_rdata_casecompare(const dns_rdata_t *rdata1, const dns_rdata_t *rdata2) {
int result = 0;
bool use_default = false;
REQUIRE(rdata1 != NULL);
REQUIRE(rdata2 != NULL);
REQUIRE(rdata1->length == 0 || rdata1->data != NULL);
REQUIRE(rdata2->length == 0 || rdata2->data != NULL);
REQUIRE(DNS_RDATA_VALIDFLAGS(rdata1));
REQUIRE(DNS_RDATA_VALIDFLAGS(rdata2));
if (rdata1->rdclass != rdata2->rdclass)
return (rdata1->rdclass < rdata2->rdclass ? -1 : 1);
if (rdata1->type != rdata2->type)
return (rdata1->type < rdata2->type ? -1 : 1);
CASECOMPARESWITCH
if (use_default) {
isc_region_t r1;
isc_region_t r2;
dns_rdata_toregion(rdata1, &r1);
dns_rdata_toregion(rdata2, &r2);
result = isc_region_compare(&r1, &r2);
}
return (result);
}
/***
*** Conversions
***/
void
dns_rdata_fromregion(dns_rdata_t *rdata, dns_rdataclass_t rdclass,
dns_rdatatype_t type, isc_region_t *r)
{
REQUIRE(rdata != NULL);
REQUIRE(DNS_RDATA_INITIALIZED(rdata));
REQUIRE(r != NULL);
REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
rdata->data = r->base;
rdata->length = r->length;
rdata->rdclass = rdclass;
rdata->type = type;
rdata->flags = 0;
}
void
dns_rdata_toregion(const dns_rdata_t *rdata, isc_region_t *r) {
REQUIRE(rdata != NULL);
REQUIRE(r != NULL);
REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
r->base = rdata->data;
r->length = rdata->length;
}
isc_result_t
dns_rdata_fromwire(dns_rdata_t *rdata, dns_rdataclass_t rdclass,
dns_rdatatype_t type, isc_buffer_t *source,
dns_decompress_t *dctx, unsigned int options,
isc_buffer_t *target)
{
isc_result_t result = ISC_R_NOTIMPLEMENTED;
isc_region_t region;
isc_buffer_t ss;
isc_buffer_t st;
bool use_default = false;
uint32_t activelength;
unsigned int length;
REQUIRE(dctx != NULL);
if (rdata != NULL) {
REQUIRE(DNS_RDATA_INITIALIZED(rdata));
REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
}
REQUIRE(source != NULL);
REQUIRE(target != NULL);
if (type == 0)
return (DNS_R_FORMERR);
ss = *source;
st = *target;
activelength = isc_buffer_activelength(source);
INSIST(activelength < 65536);
FROMWIRESWITCH
if (use_default) {
if (activelength > isc_buffer_availablelength(target))
result = ISC_R_NOSPACE;
else {
isc_buffer_putmem(target, isc_buffer_current(source),
activelength);
isc_buffer_forward(source, activelength);
result = ISC_R_SUCCESS;
}
}
/*
* Reject any rdata that expands out to more than DNS_RDATA_MAXLENGTH
* as we cannot transmit it.
*/
length = isc_buffer_usedlength(target) - isc_buffer_usedlength(&st);
if (result == ISC_R_SUCCESS && length > DNS_RDATA_MAXLENGTH)
result = DNS_R_FORMERR;
/*
* We should have consumed all of our buffer.
*/
if (result == ISC_R_SUCCESS && !buffer_empty(source))
result = DNS_R_EXTRADATA;
if (rdata != NULL && result == ISC_R_SUCCESS) {
region.base = isc_buffer_used(&st);
region.length = length;
dns_rdata_fromregion(rdata, rdclass, type, ®ion);
}
if (result != ISC_R_SUCCESS) {
*source = ss;
*target = st;
}
return (result);
}
isc_result_t
dns_rdata_towire(dns_rdata_t *rdata, dns_compress_t *cctx,
isc_buffer_t *target)
{
isc_result_t result = ISC_R_NOTIMPLEMENTED;
bool use_default = false;
isc_region_t tr;
isc_buffer_t st;
REQUIRE(rdata != NULL);
REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
/*
* Some DynDNS meta-RRs have empty rdata.
*/
if ((rdata->flags & DNS_RDATA_UPDATE) != 0) {
INSIST(rdata->length == 0);
return (ISC_R_SUCCESS);
}
st = *target;
TOWIRESWITCH
if (use_default) {
isc_buffer_availableregion(target, &tr);
if (tr.length < rdata->length)
return (ISC_R_NOSPACE);
memmove(tr.base, rdata->data, rdata->length);
isc_buffer_add(target, rdata->length);
return (ISC_R_SUCCESS);
}
if (result != ISC_R_SUCCESS) {
*target = st;
INSIST(target->used < 65536);
dns_compress_rollback(cctx, (uint16_t)target->used);
}
return (result);
}
/*
* If the binary data in 'src' is valid uncompressed wire format
* rdata of class 'rdclass' and type 'type', return ISC_R_SUCCESS
* and copy the validated rdata to 'dest'. Otherwise return an error.
*/
static isc_result_t
rdata_validate(isc_buffer_t *src, isc_buffer_t *dest, dns_rdataclass_t rdclass,
dns_rdatatype_t type)
{
dns_decompress_t dctx;
isc_result_t result;
dns_decompress_init(&dctx, -1, DNS_DECOMPRESS_NONE);
isc_buffer_setactive(src, isc_buffer_usedlength(src));
result = dns_rdata_fromwire(NULL, rdclass, type, src, &dctx, 0, dest);
dns_decompress_invalidate(&dctx);
return (result);
}
static isc_result_t
unknown_fromtext(dns_rdataclass_t rdclass, dns_rdatatype_t type,
isc_lex_t *lexer, isc_mem_t *mctx, isc_buffer_t *target)
{
isc_result_t result;
isc_buffer_t *buf = NULL;
isc_token_t token;
if (type == 0 || dns_rdatatype_ismeta(type))
return (DNS_R_METATYPE);
RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
false));
if (token.value.as_ulong > 65535U)
return (ISC_R_RANGE);
result = isc_buffer_allocate(mctx, &buf, token.value.as_ulong);
if (result != ISC_R_SUCCESS)
return (result);
if (token.value.as_ulong != 0U) {
result = isc_hex_tobuffer(lexer, buf,
(unsigned int)token.value.as_ulong);
if (result != ISC_R_SUCCESS) {
goto failure;
}
if (isc_buffer_usedlength(buf) != token.value.as_ulong) {
result = ISC_R_UNEXPECTEDEND;
goto failure;
}
}
if (dns_rdatatype_isknown(type)) {
result = rdata_validate(buf, target, rdclass, type);
} else {
isc_region_t r;
isc_buffer_usedregion(buf, &r);
result = isc_buffer_copyregion(target, &r);
}
if (result != ISC_R_SUCCESS)
goto failure;
isc_buffer_free(&buf);
return (ISC_R_SUCCESS);
failure:
isc_buffer_free(&buf);
return (result);
}
isc_result_t
dns_rdata_fromtext(dns_rdata_t *rdata, dns_rdataclass_t rdclass,
dns_rdatatype_t type, isc_lex_t *lexer,
dns_name_t *origin, unsigned int options, isc_mem_t *mctx,
isc_buffer_t *target, dns_rdatacallbacks_t *callbacks)
{
isc_result_t result = ISC_R_NOTIMPLEMENTED;
isc_region_t region;
isc_buffer_t st;
isc_token_t token;
unsigned int lexoptions = ISC_LEXOPT_EOL | ISC_LEXOPT_EOF |
ISC_LEXOPT_DNSMULTILINE | ISC_LEXOPT_ESCAPE;
char *name;
unsigned long line;
void (*callback)(dns_rdatacallbacks_t *, const char *, ...);
isc_result_t tresult;
unsigned int length;
bool unknown;
REQUIRE(origin == NULL || dns_name_isabsolute(origin) == true);
if (rdata != NULL) {
REQUIRE(DNS_RDATA_INITIALIZED(rdata));
REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
}
if (callbacks != NULL) {
REQUIRE(callbacks->warn != NULL);
REQUIRE(callbacks->error != NULL);
}
st = *target;
if (callbacks != NULL)
callback = callbacks->error;
else
callback = default_fromtext_callback;
result = isc_lex_getmastertoken(lexer, &token, isc_tokentype_qstring,
true);
if (result != ISC_R_SUCCESS) {
name = isc_lex_getsourcename(lexer);
line = isc_lex_getsourceline(lexer);
fromtext_error(callback, callbacks, name, line, NULL, result);
return (result);
}
unknown = false;
if (token.type == isc_tokentype_string &&
strcmp(DNS_AS_STR(token), "\\#") == 0) {
/*
* If this is a TXT record '\#' could be a escaped '#'.
* Look to see if the next token is a number and if so
* treat it as a unknown record format.
*/
if (type == dns_rdatatype_txt) {
result = isc_lex_getmastertoken(lexer, &token,
isc_tokentype_number,
false);
if (result == ISC_R_SUCCESS)
isc_lex_ungettoken(lexer, &token);
}
if (result == ISC_R_SUCCESS) {
unknown = true;
result = unknown_fromtext(rdclass, type, lexer,
mctx, target);
} else
options |= DNS_RDATA_UNKNOWNESCAPE;
} else
isc_lex_ungettoken(lexer, &token);
if (!unknown)
FROMTEXTSWITCH
/*
* Consume to end of line / file.
* If not at end of line initially set error code.
* Call callback via fromtext_error once if there was an error.
*/
do {
name = isc_lex_getsourcename(lexer);
line = isc_lex_getsourceline(lexer);
tresult = isc_lex_gettoken(lexer, lexoptions, &token);
if (tresult != ISC_R_SUCCESS) {
if (result == ISC_R_SUCCESS)
result = tresult;
if (callback != NULL)
fromtext_error(callback, callbacks, name,
line, NULL, result);
break;
} else if (token.type != isc_tokentype_eol &&
token.type != isc_tokentype_eof) {
if (result == ISC_R_SUCCESS)
result = DNS_R_EXTRATOKEN;
if (callback != NULL) {
fromtext_error(callback, callbacks, name,
line, &token, result);
callback = NULL;
}
} else if (result != ISC_R_SUCCESS && callback != NULL) {
fromtext_error(callback, callbacks, name, line,
&token, result);
break;
} else {
if (token.type == isc_tokentype_eof)
fromtext_warneof(lexer, callbacks);
break;
}
} while (1);
length = isc_buffer_usedlength(target) - isc_buffer_usedlength(&st);
if (result == ISC_R_SUCCESS && length > DNS_RDATA_MAXLENGTH)
result = ISC_R_NOSPACE;
if (rdata != NULL && result == ISC_R_SUCCESS) {
region.base = isc_buffer_used(&st);
region.length = length;
dns_rdata_fromregion(rdata, rdclass, type, ®ion);
}
if (result != ISC_R_SUCCESS) {
*target = st;
}
return (result);
}
static isc_result_t
unknown_totext(dns_rdata_t *rdata, dns_rdata_textctx_t *tctx,
isc_buffer_t *target)
{
isc_result_t result;
char buf[sizeof("65535")];
isc_region_t sr;
strlcpy(buf, "\\# ", sizeof(buf));
result = str_totext(buf, target);
if (result != ISC_R_SUCCESS)
return (result);
dns_rdata_toregion(rdata, &sr);
INSIST(sr.length < 65536);
snprintf(buf, sizeof(buf), "%u", sr.length);
result = str_totext(buf, target);
if (result != ISC_R_SUCCESS)
return (result);
if (sr.length != 0U) {
if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
result = str_totext(" ( ", target);
else
result = str_totext(" ", target);
if (result != ISC_R_SUCCESS)
return (result);
if (tctx->width == 0) /* No splitting */
result = isc_hex_totext(&sr, 0, "", target);
else
result = isc_hex_totext(&sr, tctx->width - 2,
tctx->linebreak,
target);
if (result == ISC_R_SUCCESS &&
(tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
result = str_totext(" )", target);
}
return (result);
}
static isc_result_t
rdata_totext(dns_rdata_t *rdata, dns_rdata_textctx_t *tctx,
isc_buffer_t *target)
{
isc_result_t result = ISC_R_NOTIMPLEMENTED;
bool use_default = false;
unsigned int cur;
REQUIRE(rdata != NULL);
REQUIRE(tctx->origin == NULL ||
dns_name_isabsolute(tctx->origin) == true);
/*
* Some DynDNS meta-RRs have empty rdata.
*/
if ((rdata->flags & DNS_RDATA_UPDATE) != 0) {
INSIST(rdata->length == 0);
return (ISC_R_SUCCESS);
}
if ((tctx->flags & DNS_STYLEFLAG_UNKNOWNFORMAT) != 0)
return (unknown_totext(rdata, tctx, target));
cur = isc_buffer_usedlength(target);
TOTEXTSWITCH
if (use_default || (result == ISC_R_NOTIMPLEMENTED)) {
unsigned int u = isc_buffer_usedlength(target);
INSIST(u >= cur);
isc_buffer_subtract(target, u - cur);
result = unknown_totext(rdata, tctx, target);
}
return (result);
}
isc_result_t
dns_rdata_totext(dns_rdata_t *rdata, dns_name_t *origin, isc_buffer_t *target)
{
dns_rdata_textctx_t tctx;
REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
/*
* Set up formatting options for single-line output.
*/
tctx.origin = origin;
tctx.flags = 0;
tctx.width = 60;
tctx.linebreak = " ";
return (rdata_totext(rdata, &tctx, target));
}
isc_result_t
dns_rdata_tofmttext(dns_rdata_t *rdata, dns_name_t *origin,
unsigned int flags, unsigned int width,
unsigned int split_width, const char *linebreak,
isc_buffer_t *target)
{
dns_rdata_textctx_t tctx;
REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
/*
* Set up formatting options for formatted output.
*/
tctx.origin = origin;
tctx.flags = flags;
if (split_width == 0xffffffff)
tctx.width = width;
else
tctx.width = split_width;
if ((flags & DNS_STYLEFLAG_MULTILINE) != 0)
tctx.linebreak = linebreak;
else {
if (split_width == 0xffffffff)
tctx.width = 60; /* Used for hex word length only. */
tctx.linebreak = " ";
}
return (rdata_totext(rdata, &tctx, target));
}
isc_result_t
dns_rdata_fromstruct(dns_rdata_t *rdata, dns_rdataclass_t rdclass,
dns_rdatatype_t type, void *source,
isc_buffer_t *target)
{
isc_result_t result = ISC_R_NOTIMPLEMENTED;
isc_buffer_t st;
isc_region_t region;
bool use_default = false;
unsigned int length;
REQUIRE(source != NULL);
if (rdata != NULL) {
REQUIRE(DNS_RDATA_INITIALIZED(rdata));
REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
}
st = *target;
FROMSTRUCTSWITCH
if (use_default)
(void)NULL;
length = isc_buffer_usedlength(target) - isc_buffer_usedlength(&st);
if (result == ISC_R_SUCCESS && length > DNS_RDATA_MAXLENGTH)
result = ISC_R_NOSPACE;
if (rdata != NULL && result == ISC_R_SUCCESS) {
region.base = isc_buffer_used(&st);
region.length = length;
dns_rdata_fromregion(rdata, rdclass, type, ®ion);
}
if (result != ISC_R_SUCCESS)
*target = st;
return (result);
}
isc_result_t
dns_rdata_tostruct(const dns_rdata_t *rdata, void *target, isc_mem_t *mctx) {
isc_result_t result = ISC_R_NOTIMPLEMENTED;
bool use_default = false;
REQUIRE(rdata != NULL);
REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
TOSTRUCTSWITCH
if (use_default)
(void)NULL;
return (result);
}
void
dns_rdata_freestruct(void *source) {
dns_rdatacommon_t *common;
REQUIRE(source != NULL);
common = source;
FREESTRUCTSWITCH
}
isc_result_t
dns_rdata_additionaldata(dns_rdata_t *rdata, dns_additionaldatafunc_t add,
void *arg)
{
isc_result_t result = ISC_R_NOTIMPLEMENTED;
bool use_default = false;
/*
* Call 'add' for each name and type from 'rdata' which is subject to
* additional section processing.
*/
REQUIRE(rdata != NULL);
REQUIRE(add != NULL);
REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
ADDITIONALDATASWITCH
/* No additional processing for unknown types */
if (use_default)
result = ISC_R_SUCCESS;
return (result);
}
isc_result_t
dns_rdata_digest(dns_rdata_t *rdata, dns_digestfunc_t digest, void *arg) {
isc_result_t result = ISC_R_NOTIMPLEMENTED;
bool use_default = false;
isc_region_t r;
/*
* Send 'rdata' in DNSSEC canonical form to 'digest'.
*/
REQUIRE(rdata != NULL);
REQUIRE(digest != NULL);
REQUIRE(DNS_RDATA_VALIDFLAGS(rdata));
DIGESTSWITCH
if (use_default) {
dns_rdata_toregion(rdata, &r);
result = (digest)(arg, &r);
}
return (result);
}
bool
dns_rdata_checkowner(dns_name_t *name, dns_rdataclass_t rdclass,
dns_rdatatype_t type, bool wildcard)
{
bool result;
CHECKOWNERSWITCH
return (result);
}
bool
dns_rdata_checknames(dns_rdata_t *rdata, dns_name_t *owner, dns_name_t *bad)
{
bool result;
CHECKNAMESSWITCH
return (result);
}
unsigned int
dns_rdatatype_attributes(dns_rdatatype_t type)
{
RDATATYPE_ATTRIBUTE_SW
if (type >= (dns_rdatatype_t)128 && type < (dns_rdatatype_t)255)
return (DNS_RDATATYPEATTR_UNKNOWN | DNS_RDATATYPEATTR_META);
return (DNS_RDATATYPEATTR_UNKNOWN);
}
isc_result_t
dns_rdatatype_fromtext(dns_rdatatype_t *typep, isc_textregion_t *source) {
unsigned int hash;
unsigned int n;
unsigned char a, b;
n = source->length;
if (n == 0)
return (DNS_R_UNKNOWN);
a = tolower((unsigned char)source->base[0]);
b = tolower((unsigned char)source->base[n - 1]);
hash = ((a + n) * b) % 256;
/*
* This switch block is inlined via \#define, and will use "return"
* to return a result to the caller if it is a valid (known)
* rdatatype name.
*/
RDATATYPE_FROMTEXT_SW(hash, source->base, n, typep);
if (source->length > 4 && source->length < (4 + sizeof("65000")) &&
strncasecmp("type", source->base, 4) == 0) {
char buf[sizeof("65000")];
char *endp;
unsigned int val;
/*
* source->base is not required to be NUL terminated.
* Copy up to remaining bytes and NUL terminate.
*/
snprintf(buf, sizeof(buf), "%.*s",
(int)(source->length - 4), source->base + 4);
val = strtoul(buf, &endp, 10);
if (*endp == '\0' && val <= 0xffff) {
*typep = (dns_rdatatype_t)val;
return (ISC_R_SUCCESS);
}
}
return (DNS_R_UNKNOWN);
}
isc_result_t
dns_rdatatype_totext(dns_rdatatype_t type, isc_buffer_t *target) {
RDATATYPE_TOTEXT_SW
return (dns_rdatatype_tounknowntext(type, target));
}
isc_result_t
dns_rdatatype_tounknowntext(dns_rdatatype_t type, isc_buffer_t *target) {
char buf[sizeof("TYPE65535")];
snprintf(buf, sizeof(buf), "TYPE%u", type);
return (str_totext(buf, target));
}
void
dns_rdatatype_format(dns_rdatatype_t rdtype,
char *array, unsigned int size)
{
isc_result_t result;
isc_buffer_t buf;
if (size == 0U)
return;
isc_buffer_init(&buf, array, size);
result = dns_rdatatype_totext(rdtype, &buf);
/*
* Null terminate.
*/
if (result == ISC_R_SUCCESS) {
if (isc_buffer_availablelength(&buf) >= 1)
isc_buffer_putuint8(&buf, 0);
else
result = ISC_R_NOSPACE;
}
if (result != ISC_R_SUCCESS)
strlcpy(array, "<unknown>", size);
}
/*
* Private function.
*/
static unsigned int
name_length(dns_name_t *name) {
return (name->length);
}
static isc_result_t
txt_totext(isc_region_t *source, bool quote, isc_buffer_t *target) {
unsigned int tl;
unsigned int n;
unsigned char *sp;
char *tp;
isc_region_t region;
isc_buffer_availableregion(target, ®ion);
sp = source->base;
tp = (char *)region.base;
tl = region.length;
n = *sp++;
REQUIRE(n + 1 <= source->length);
if (n == 0U)
REQUIRE(quote == true);
if (quote) {
if (tl < 1)
return (ISC_R_NOSPACE);
*tp++ = '"';
tl--;
}
while (n--) {
/*
* \DDD space (0x20) if not quoting.
*/
if (*sp < (quote ? 0x20 : 0x21) || *sp >= 0x7f) {
if (tl < 4)
return (ISC_R_NOSPACE);
*tp++ = 0x5c;
*tp++ = 0x30 + ((*sp / 100) % 10);
*tp++ = 0x30 + ((*sp / 10) % 10);
*tp++ = 0x30 + (*sp % 10);
sp++;
tl -= 4;
continue;
}
/*
* Escape double quote and backslash. If we are not
* enclosing the string in double quotes also escape
* at sign and semicolon.
*/
if (*sp == 0x22 || *sp == 0x5c ||
(!quote && (*sp == 0x40 || *sp == 0x3b))) {
if (tl < 2)
return (ISC_R_NOSPACE);
*tp++ = '\\';
tl--;
}
if (tl < 1)
return (ISC_R_NOSPACE);
*tp++ = *sp++;
tl--;
}
if (quote) {
if (tl < 1)
return (ISC_R_NOSPACE);
*tp++ = '"';
tl--;
POST(tl);
}
isc_buffer_add(target, (unsigned int)(tp - (char *)region.base));
isc_region_consume(source, *source->base + 1);
return (ISC_R_SUCCESS);
}
static isc_result_t
txt_fromtext(isc_textregion_t *source, isc_buffer_t *target) {
isc_region_t tregion;
bool escape;
unsigned int n, nrem;
char *s;
unsigned char *t;
int d;
int c;
isc_buffer_availableregion(target, &tregion);
s = source->base;
n = source->length;
t = tregion.base;
nrem = tregion.length;
escape = false;
if (nrem < 1)
return (ISC_R_NOSPACE);
/*
* Length byte.
*/
nrem--;
t++;
/*
* Maximum text string length.
*/
if (nrem > 255)
nrem = 255;
while (n-- != 0) {
c = (*s++) & 0xff;
if (escape && (d = decvalue((char)c)) != -1) {
c = d;
if (n == 0)
return (DNS_R_SYNTAX);
n--;
if ((d = decvalue(*s++)) != -1)
c = c * 10 + d;
else
return (DNS_R_SYNTAX);
if (n == 0)
return (DNS_R_SYNTAX);
n--;
if ((d = decvalue(*s++)) != -1)
c = c * 10 + d;
else
return (DNS_R_SYNTAX);
if (c > 255)
return (DNS_R_SYNTAX);
} else if (!escape && c == '\\') {
escape = true;
continue;
}
escape = false;
if (nrem == 0)
return ((tregion.length <= 256U) ?
ISC_R_NOSPACE : DNS_R_SYNTAX);
*t++ = c;
nrem--;
}
if (escape)
return (DNS_R_SYNTAX);
*tregion.base = (unsigned char)(t - tregion.base - 1);
isc_buffer_add(target, *tregion.base + 1);
return (ISC_R_SUCCESS);
}
static isc_result_t
txt_fromwire(isc_buffer_t *source, isc_buffer_t *target) {
unsigned int n;
isc_region_t sregion;
isc_region_t tregion;
isc_buffer_activeregion(source, &sregion);
if (sregion.length == 0)
return (ISC_R_UNEXPECTEDEND);
n = *sregion.base + 1;
if (n > sregion.length)
return (ISC_R_UNEXPECTEDEND);
isc_buffer_availableregion(target, &tregion);
if (n > tregion.length)
return (ISC_R_NOSPACE);
if (tregion.base != sregion.base)
memmove(tregion.base, sregion.base, n);
isc_buffer_forward(source, n);
isc_buffer_add(target, n);
return (ISC_R_SUCCESS);
}
/*
* Conversion of TXT-like rdata fields without length limits.
*/
static isc_result_t
multitxt_totext(isc_region_t *source, isc_buffer_t *target) {
unsigned int tl;
unsigned int n0, n;
unsigned char *sp;
char *tp;
isc_region_t region;
isc_buffer_availableregion(target, ®ion);
sp = source->base;
tp = (char *)region.base;
tl = region.length;
if (tl < 1)
return (ISC_R_NOSPACE);
*tp++ = '"';
tl--;
do {
n = source->length;
n0 = source->length - 1;
while (n--) {
if (*sp < 0x20 || *sp >= 0x7f) {
if (tl < 4)
return (ISC_R_NOSPACE);
*tp++ = 0x5c;
*tp++ = 0x30 + ((*sp / 100) % 10);
*tp++ = 0x30 + ((*sp / 10) % 10);
*tp++ = 0x30 + (*sp % 10);
sp++;
tl -= 4;
continue;
}
/* double quote, backslash */
if (*sp == 0x22 || *sp == 0x5c) {
if (tl < 2)
return (ISC_R_NOSPACE);
*tp++ = '\\';
tl--;
}
if (tl < 1)
return (ISC_R_NOSPACE);
*tp++ = *sp++;
tl--;
}
isc_region_consume(source, n0 + 1);
} while (source->length != 0);
if (tl < 1)
return (ISC_R_NOSPACE);
*tp++ = '"';
tl--;
POST(tl);
isc_buffer_add(target, (unsigned int)(tp - (char *)region.base));
return (ISC_R_SUCCESS);
}
static isc_result_t
multitxt_fromtext(isc_textregion_t *source, isc_buffer_t *target) {
isc_region_t tregion;
bool escape;
unsigned int n, nrem;
char *s;
unsigned char *t0, *t;
int d;
int c;
s = source->base;
n = source->length;
escape = false;
do {
isc_buffer_availableregion(target, &tregion);
t0 = t = tregion.base;
nrem = tregion.length;
if (nrem < 1)
return (ISC_R_NOSPACE);
while (n != 0) {
--n;
c = (*s++) & 0xff;
if (escape && (d = decvalue((char)c)) != -1) {
c = d;
if (n == 0)
return (DNS_R_SYNTAX);
n--;
if ((d = decvalue(*s++)) != -1)
c = c * 10 + d;
else
return (DNS_R_SYNTAX);
if (n == 0)
return (DNS_R_SYNTAX);
n--;
if ((d = decvalue(*s++)) != -1)
c = c * 10 + d;
else
return (DNS_R_SYNTAX);
if (c > 255)
return (DNS_R_SYNTAX);
} else if (!escape && c == '\\') {
escape = true;
continue;
}
escape = false;
*t++ = c;
nrem--;
if (nrem == 0)
break;
}
if (escape)
return (DNS_R_SYNTAX);
isc_buffer_add(target, (unsigned int)(t - t0));
} while (n != 0);
return (ISC_R_SUCCESS);
}
static bool
name_prefix(dns_name_t *name, dns_name_t *origin, dns_name_t *target) {
int l1, l2;
if (origin == NULL)
goto return_false;
if (dns_name_compare(origin, dns_rootname) == 0)
goto return_false;
if (!dns_name_issubdomain(name, origin))
goto return_false;
l1 = dns_name_countlabels(name);
l2 = dns_name_countlabels(origin);
if (l1 == l2)
goto return_false;
/* Master files should be case preserving. */
dns_name_getlabelsequence(name, l1 - l2, l2, target);
if (!dns_name_caseequal(origin, target))
goto return_false;
dns_name_getlabelsequence(name, 0, l1 - l2, target);
return (true);
return_false:
*target = *name;
return (false);
}
static isc_result_t
str_totext(const char *source, isc_buffer_t *target) {
unsigned int l;
isc_region_t region;
isc_buffer_availableregion(target, ®ion);
l = strlen(source);
if (l > region.length)
return (ISC_R_NOSPACE);
memmove(region.base, source, l);
isc_buffer_add(target, l);
return (ISC_R_SUCCESS);
}
static isc_result_t
inet_totext(int af, isc_region_t *src, isc_buffer_t *target) {
char tmpbuf[64];
/* Note - inet_ntop doesn't do size checking on its input. */
if (inet_ntop(af, src->base, tmpbuf, sizeof(tmpbuf)) == NULL)
return (ISC_R_NOSPACE);
if (strlen(tmpbuf) > isc_buffer_availablelength(target))
return (ISC_R_NOSPACE);
isc_buffer_putstr(target, tmpbuf);
return (ISC_R_SUCCESS);
}
static bool
buffer_empty(isc_buffer_t *source) {
return((source->current == source->active) ? true : false);
}
static void
buffer_fromregion(isc_buffer_t *buffer, isc_region_t *region) {
isc_buffer_init(buffer, region->base, region->length);
isc_buffer_add(buffer, region->length);
isc_buffer_setactive(buffer, region->length);
}
static isc_result_t
uint32_tobuffer(uint32_t value, isc_buffer_t *target) {
isc_region_t region;
isc_buffer_availableregion(target, ®ion);
if (region.length < 4)
return (ISC_R_NOSPACE);
isc_buffer_putuint32(target, value);
return (ISC_R_SUCCESS);
}
static isc_result_t
uint16_tobuffer(uint32_t value, isc_buffer_t *target) {
isc_region_t region;
if (value > 0xffff)
return (ISC_R_RANGE);
isc_buffer_availableregion(target, ®ion);
if (region.length < 2)
return (ISC_R_NOSPACE);
isc_buffer_putuint16(target, (uint16_t)value);
return (ISC_R_SUCCESS);
}
static isc_result_t
uint8_tobuffer(uint32_t value, isc_buffer_t *target) {
isc_region_t region;
if (value > 0xff)
return (ISC_R_RANGE);
isc_buffer_availableregion(target, ®ion);
if (region.length < 1)
return (ISC_R_NOSPACE);
isc_buffer_putuint8(target, (uint8_t)value);
return (ISC_R_SUCCESS);
}
static isc_result_t
name_tobuffer(dns_name_t *name, isc_buffer_t *target) {
isc_region_t r;
dns_name_toregion(name, &r);
return (isc_buffer_copyregion(target, &r));
}
static uint32_t
uint32_fromregion(isc_region_t *region) {
uint32_t value;
REQUIRE(region->length >= 4);
value = (uint32_t)region->base[0] << 24;
value |= (uint32_t)region->base[1] << 16;
value |= (uint32_t)region->base[2] << 8;
value |= (uint32_t)region->base[3];
return(value);
}
static uint16_t
uint16_consume_fromregion(isc_region_t *region) {
uint16_t r = uint16_fromregion(region);
isc_region_consume(region, 2);
return r;
}
static uint16_t
uint16_fromregion(isc_region_t *region) {
REQUIRE(region->length >= 2);
return ((region->base[0] << 8) | region->base[1]);
}
static uint8_t
uint8_fromregion(isc_region_t *region) {
REQUIRE(region->length >= 1);
return (region->base[0]);
}
static uint8_t
uint8_consume_fromregion(isc_region_t *region) {
uint8_t r = uint8_fromregion(region);
isc_region_consume(region, 1);
return r;
}
static isc_result_t
mem_tobuffer(isc_buffer_t *target, void *base, unsigned int length) {
isc_region_t tr;
if (length == 0U)
return (ISC_R_SUCCESS);
isc_buffer_availableregion(target, &tr);
if (length > tr.length)
return (ISC_R_NOSPACE);
if (tr.base != base)
memmove(tr.base, base, length);
isc_buffer_add(target, length);
return (ISC_R_SUCCESS);
}
static int
hexvalue(char value) {
const char *s;
unsigned char c;
c = (unsigned char)value;
if (!isascii(c))
return (-1);
if (isupper(c))
c = tolower(c);
if ((s = strchr(hexdigits, c)) == NULL)
return (-1);
return (int)(s - hexdigits);
}
static int
decvalue(char value) {
const char *s;
/*
* isascii() is valid for full range of int values, no need to
* mask or cast.
*/
if (!isascii(value))
return (-1);
if ((s = strchr(decdigits, value)) == NULL)
return (-1);
return (int)(s - decdigits);
}
static void
default_fromtext_callback(dns_rdatacallbacks_t *callbacks, const char *fmt,
...)
{
va_list ap;
UNUSED(callbacks);
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, "\n");
}
static void
fromtext_warneof(isc_lex_t *lexer, dns_rdatacallbacks_t *callbacks) {
if (isc_lex_isfile(lexer) && callbacks != NULL) {
const char *name = isc_lex_getsourcename(lexer);
if (name == NULL)
name = "UNKNOWN";
(*callbacks->warn)(callbacks,
"%s:%lu: file does not end with newline",
name, isc_lex_getsourceline(lexer));
}
}
static void
warn_badmx(isc_token_t *token, isc_lex_t *lexer,
dns_rdatacallbacks_t *callbacks)
{
const char *file;
unsigned long line;
if (lexer != NULL) {
file = isc_lex_getsourcename(lexer);
line = isc_lex_getsourceline(lexer);
(*callbacks->warn)(callbacks, "%s:%u: warning: '%s': %s",
file, line, DNS_AS_STR(*token),
dns_result_totext(DNS_R_MXISADDRESS));
}
}
static void
warn_badname(dns_name_t *name, isc_lex_t *lexer,
dns_rdatacallbacks_t *callbacks)
{
const char *file;
unsigned long line;
char namebuf[DNS_NAME_FORMATSIZE];
if (lexer != NULL) {
file = isc_lex_getsourcename(lexer);
line = isc_lex_getsourceline(lexer);
dns_name_format(name, namebuf, sizeof(namebuf));
(*callbacks->warn)(callbacks, "%s:%u: warning: %s: %s",
file, line, namebuf,
dns_result_totext(DNS_R_BADNAME));
}
}
static void
fromtext_error(void (*callback)(dns_rdatacallbacks_t *, const char *, ...),
dns_rdatacallbacks_t *callbacks, const char *name,
unsigned long line, isc_token_t *token, isc_result_t result)
{
if (name == NULL)
name = "UNKNOWN";
if (token != NULL) {
switch (token->type) {
case isc_tokentype_eol:
(*callback)(callbacks, "%s: %s:%lu: near eol: %s",
"dns_rdata_fromtext", name, line,
dns_result_totext(result));
break;
case isc_tokentype_eof:
(*callback)(callbacks, "%s: %s:%lu: near eof: %s",
"dns_rdata_fromtext", name, line,
dns_result_totext(result));
break;
case isc_tokentype_number:
(*callback)(callbacks, "%s: %s:%lu: near %lu: %s",
"dns_rdata_fromtext", name, line,
token->value.as_ulong,
dns_result_totext(result));
break;
case isc_tokentype_string:
case isc_tokentype_qstring:
(*callback)(callbacks, "%s: %s:%lu: near '%s': %s",
"dns_rdata_fromtext", name, line,
DNS_AS_STR(*token),
dns_result_totext(result));
break;
default:
(*callback)(callbacks, "%s: %s:%lu: %s",
"dns_rdata_fromtext", name, line,
dns_result_totext(result));
break;
}
} else {
(*callback)(callbacks, "dns_rdata_fromtext: %s:%lu: %s",
name, line, dns_result_totext(result));
}
}
dns_rdatatype_t
dns_rdata_covers(dns_rdata_t *rdata) {
if (rdata->type == dns_rdatatype_rrsig)
return (covers_rrsig(rdata));
return (covers_sig(rdata));
}
bool
dns_rdatatype_ismeta(dns_rdatatype_t type) {
if ((dns_rdatatype_attributes(type) & DNS_RDATATYPEATTR_META) != 0)
return (true);
return (false);
}
bool
dns_rdatatype_issingleton(dns_rdatatype_t type) {
if ((dns_rdatatype_attributes(type) & DNS_RDATATYPEATTR_SINGLETON)
!= 0)
return (true);
return (false);
}
bool
dns_rdatatype_notquestion(dns_rdatatype_t type) {
if ((dns_rdatatype_attributes(type) & DNS_RDATATYPEATTR_NOTQUESTION)
!= 0)
return (true);
return (false);
}
bool
dns_rdatatype_questiononly(dns_rdatatype_t type) {
if ((dns_rdatatype_attributes(type) & DNS_RDATATYPEATTR_QUESTIONONLY)
!= 0)
return (true);
return (false);
}
bool
dns_rdatatype_atcname(dns_rdatatype_t type) {
if ((dns_rdatatype_attributes(type) & DNS_RDATATYPEATTR_ATCNAME) != 0) {
return (true);
}
return (false);
}
bool
dns_rdatatype_atparent(dns_rdatatype_t type) {
if ((dns_rdatatype_attributes(type) & DNS_RDATATYPEATTR_ATPARENT) != 0)
return (true);
return (false);
}
bool
dns_rdataclass_ismeta(dns_rdataclass_t rdclass) {
if (rdclass == dns_rdataclass_reserved0
|| rdclass == dns_rdataclass_none
|| rdclass == dns_rdataclass_any)
return (true);
return (false); /* Assume it is not a meta class. */
}
bool
dns_rdatatype_isdnssec(dns_rdatatype_t type) {
if ((dns_rdatatype_attributes(type) & DNS_RDATATYPEATTR_DNSSEC) != 0)
return (true);
return (false);
}
bool
dns_rdatatype_iszonecutauth(dns_rdatatype_t type) {
if ((dns_rdatatype_attributes(type) & DNS_RDATATYPEATTR_ZONECUTAUTH)
!= 0)
{
return (true);
}
return (false);
}
bool
dns_rdatatype_isknown(dns_rdatatype_t type) {
if ((dns_rdatatype_attributes(type) & DNS_RDATATYPEATTR_UNKNOWN)
== 0)
return (true);
return (false);
}
void
dns_rdata_exists(dns_rdata_t *rdata, dns_rdatatype_t type) {
REQUIRE(rdata != NULL);
REQUIRE(DNS_RDATA_INITIALIZED(rdata));
rdata->data = NULL;
rdata->length = 0;
rdata->flags = DNS_RDATA_UPDATE;
rdata->type = type;
rdata->rdclass = dns_rdataclass_any;
}
void
dns_rdata_notexist(dns_rdata_t *rdata, dns_rdatatype_t type) {
REQUIRE(rdata != NULL);
REQUIRE(DNS_RDATA_INITIALIZED(rdata));
rdata->data = NULL;
rdata->length = 0;
rdata->flags = DNS_RDATA_UPDATE;
rdata->type = type;
rdata->rdclass = dns_rdataclass_none;
}
void
dns_rdata_deleterrset(dns_rdata_t *rdata, dns_rdatatype_t type) {
REQUIRE(rdata != NULL);
REQUIRE(DNS_RDATA_INITIALIZED(rdata));
rdata->data = NULL;
rdata->length = 0;
rdata->flags = DNS_RDATA_UPDATE;
rdata->type = type;
rdata->rdclass = dns_rdataclass_any;
}
void
dns_rdata_makedelete(dns_rdata_t *rdata) {
REQUIRE(rdata != NULL);
rdata->rdclass = dns_rdataclass_none;
}
const char *
dns_rdata_updateop(dns_rdata_t *rdata, dns_section_t section) {
REQUIRE(rdata != NULL);
REQUIRE(DNS_RDATA_INITIALIZED(rdata));
switch (section) {
case DNS_SECTION_PREREQUISITE:
switch (rdata->rdclass) {
case dns_rdataclass_none:
switch (rdata->type) {
case dns_rdatatype_any:
return ("domain doesn't exist");
default:
return ("rrset doesn't exist");
}
case dns_rdataclass_any:
switch (rdata->type) {
case dns_rdatatype_any:
return ("domain exists");
default:
return ("rrset exists (value independent)");
}
default:
return ("rrset exists (value dependent)");
}
case DNS_SECTION_UPDATE:
switch (rdata->rdclass) {
case dns_rdataclass_none:
return ("delete");
case dns_rdataclass_any:
switch (rdata->type) {
case dns_rdatatype_any:
return ("delete all rrsets");
default:
return ("delete rrset");
}
default:
return ("add");
}
}
return ("invalid");
}