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