/*
host.c - host name lookup routines
Parts of this file were part of the nss_ldap library (as ldap-hosts.c)
which has been forked into the nss-pam-ldapd library.
Copyright (C) 1997-2005 Luke Howard
Copyright (C) 2006 West Consulting
Copyright (C) 2006-2014 Arthur de Jong
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include "common.h"
#include "log.h"
#include "myldap.h"
#include "cfg.h"
#include "attmap.h"
/* ( nisSchema.2.6 NAME 'ipHost' SUP top AUXILIARY
* DESC 'Abstraction of a host, an IP device. The distinguished
* value of the cn attribute denotes the host's canonical
* name. Device SHOULD be used as a structural class'
* MUST ( cn $ ipHostNumber )
* MAY ( l $ description $ manager ) )
*/
/* the search base for searches */
const char *host_bases[NSS_LDAP_CONFIG_MAX_BASES] = { NULL };
/* the search scope for searches */
int host_scope = LDAP_SCOPE_DEFAULT;
/* the basic search filter for searches */
const char *host_filter = "(objectClass=ipHost)";
/* the attributes to request with searches */
const char *attmap_host_cn = "cn";
const char *attmap_host_ipHostNumber = "ipHostNumber";
/* the attribute list to request with searches */
static const char *host_attrs[3];
/* create a search filter for searching a host entry
by name, return -1 on errors */
static int mkfilter_host_byname(const char *name, char *buffer, size_t buflen)
{
char safename[BUFLEN_HOSTNAME];
/* escape attribute */
if (myldap_escape(name, safename, sizeof(safename)))
{
log_log(LOG_ERR, "mkfilter_host_byname(): safename buffer too small");
return -1;
}
/* build filter */
return mysnprintf(buffer, buflen, "(&%s(%s=%s))",
host_filter, attmap_host_cn, safename);
}
static int mkfilter_host_byaddr(const char *addrstr,
char *buffer, size_t buflen)
{
char safeaddr[64];
/* escape attribute */
if (myldap_escape(addrstr, safeaddr, sizeof(safeaddr)))
{
log_log(LOG_ERR, "mkfilter_host_byaddr(): safeaddr buffer too small");
return -1;
}
/* build filter */
return mysnprintf(buffer, buflen, "(&%s(%s=%s))",
host_filter, attmap_host_ipHostNumber, safeaddr);
}
void host_init(void)
{
int i;
/* set up search bases */
if (host_bases[0] == NULL)
for (i = 0; i < NSS_LDAP_CONFIG_MAX_BASES; i++)
host_bases[i] = nslcd_cfg->bases[i];
/* set up scope */
if (host_scope == LDAP_SCOPE_DEFAULT)
host_scope = nslcd_cfg->scope;
/* set up attribute list */
host_attrs[0] = attmap_host_cn;
host_attrs[1] = attmap_host_ipHostNumber;
host_attrs[2] = NULL;
}
/* write a single host entry to the stream */
static int write_host(TFILE *fp, MYLDAP_ENTRY *entry)
{
int32_t tmpint32, tmp2int32, tmp3int32;
int numaddr, i;
const char *hostname;
const char **hostnames;
const char **addresses;
/* get the most canonical name */
hostname = myldap_get_rdn_value(entry, attmap_host_cn);
/* get the other names for the host */
hostnames = myldap_get_values(entry, attmap_host_cn);
if ((hostnames == NULL) || (hostnames[0] == NULL))
{
log_log(LOG_WARNING, "%s: %s: missing",
myldap_get_dn(entry), attmap_host_cn);
return 0;
}
/* if the hostname is not yet found, get the first entry from hostnames */
if (hostname == NULL)
hostname = hostnames[0];
/* get the addresses */
addresses = myldap_get_values(entry, attmap_host_ipHostNumber);
if ((addresses == NULL) || (addresses[0] == NULL))
{
log_log(LOG_WARNING, "%s: %s: missing",
myldap_get_dn(entry), attmap_host_ipHostNumber);
return 0;
}
/* write the entry */
WRITE_INT32(fp, NSLCD_RESULT_BEGIN);
WRITE_STRING(fp, hostname);
WRITE_STRINGLIST_EXCEPT(fp, hostnames, hostname);
for (numaddr = 0; addresses[numaddr] != NULL; numaddr++)
/* noting */ ;
WRITE_INT32(fp, numaddr);
for (i = 0; i < numaddr; i++)
{
WRITE_ADDRESS(fp, entry, attmap_host_ipHostNumber, addresses[i]);
}
return 0;
}
NSLCD_HANDLE(
host, byname, NSLCD_ACTION_HOST_BYNAME,
char name[BUFLEN_HOSTNAME];
char filter[BUFLEN_FILTER];
READ_STRING(fp, name);
log_setrequest("host=\"%s\"", name);,
mkfilter_host_byname(name, filter, sizeof(filter)),
write_host(fp, entry)
)
NSLCD_HANDLE(
host, byaddr, NSLCD_ACTION_HOST_BYADDR,
int af;
char addr[64];
int len = sizeof(addr);
char addrstr[64];
char filter[BUFLEN_FILTER];
READ_ADDRESS(fp, addr, len, af);
/* translate the address to a string */
if (inet_ntop(af, addr, addrstr, sizeof(addrstr)) == NULL)
{
log_log(LOG_WARNING, "unable to convert address to string");
return -1;
}
log_setrequest("host=%s", addrstr);,
mkfilter_host_byaddr(addrstr, filter, sizeof(filter)),
write_host(fp, entry)
)
NSLCD_HANDLE(
host, all, NSLCD_ACTION_HOST_ALL,
const char *filter;
log_setrequest("host(all)");,
(filter = host_filter, 0),
write_host(fp, entry)
)