/* $NetBSD: ldap.c,v 1.1.1.4 2014/07/12 11:58:13 spz Exp $ */ /* ldap.c Routines for reading the configuration from LDAP */ /* * Copyright (c) 2003-2006 Ntelos, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of The Internet Software Consortium nor the names * of its contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * This LDAP module was written by Brian Masney . Its * development was sponsored by Ntelos, Inc. (www.ntelos.com). */ #include __RCSID("$NetBSD: ldap.c,v 1.1.1.4 2014/07/12 11:58:13 spz Exp $"); #include "dhcpd.h" #include #include #if defined(LDAP_CONFIGURATION) #if defined(LDAP_CASA_AUTH) #include "ldap_casa.h" #endif static LDAP * ld = NULL; static char *ldap_server = NULL, *ldap_username = NULL, *ldap_password = NULL, *ldap_base_dn = NULL, *ldap_dhcp_server_cn = NULL, *ldap_debug_file = NULL; static int ldap_port = LDAP_PORT, ldap_method = LDAP_METHOD_DYNAMIC, ldap_referrals = -1, ldap_debug_fd = -1; #if defined (LDAP_USE_SSL) static int ldap_use_ssl = -1, /* try TLS if possible */ ldap_tls_reqcert = -1, ldap_tls_crlcheck = -1; static char *ldap_tls_ca_file = NULL, *ldap_tls_ca_dir = NULL, *ldap_tls_cert = NULL, *ldap_tls_key = NULL, *ldap_tls_ciphers = NULL, *ldap_tls_randfile = NULL; #endif static struct ldap_config_stack *ldap_stack = NULL; typedef struct ldap_dn_node { struct ldap_dn_node *next; size_t refs; char *dn; } ldap_dn_node; static ldap_dn_node *ldap_service_dn_head = NULL; static ldap_dn_node *ldap_service_dn_tail = NULL; static char * x_strncat(char *dst, const char *src, size_t dst_size) { size_t len = strlen(dst); return strncat(dst, src, dst_size > len ? dst_size - len - 1: 0); } static void ldap_parse_class (struct ldap_config_stack *item, struct parse *cfile) { struct berval **tempbv; if ((tempbv = ldap_get_values_len (ld, item->ldent, "cn")) == NULL || tempbv[0] == NULL) { if (tempbv != NULL) ldap_value_free_len (tempbv); return; } x_strncat (cfile->inbuf, "class \"", LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, tempbv[0]->bv_val, LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, "\" {\n", LDAP_BUFFER_SIZE); item->close_brace = 1; ldap_value_free_len (tempbv); } static void ldap_parse_subclass (struct ldap_config_stack *item, struct parse *cfile) { struct berval **tempbv, **classdata; if ((tempbv = ldap_get_values_len (ld, item->ldent, "cn")) == NULL || tempbv[0] == NULL) { if (tempbv != NULL) ldap_value_free_len (tempbv); return; } if ((classdata = ldap_get_values_len (ld, item->ldent, "dhcpClassData")) == NULL || classdata[0] == NULL) { if (classdata != NULL) ldap_value_free_len (classdata); ldap_value_free_len (tempbv); return; } x_strncat (cfile->inbuf, "subclass ", LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, classdata[0]->bv_val, LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, " ", LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, tempbv[0]->bv_val, LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, " {\n", LDAP_BUFFER_SIZE); item->close_brace = 1; ldap_value_free_len (tempbv); ldap_value_free_len (classdata); } static void ldap_parse_host (struct ldap_config_stack *item, struct parse *cfile) { struct berval **tempbv, **hwaddr; if ((tempbv = ldap_get_values_len (ld, item->ldent, "cn")) == NULL || tempbv[0] == NULL) { if (tempbv != NULL) ldap_value_free_len (tempbv); return; } hwaddr = ldap_get_values_len (ld, item->ldent, "dhcpHWAddress"); x_strncat (cfile->inbuf, "host ", LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, tempbv[0]->bv_val, LDAP_BUFFER_SIZE); if (hwaddr != NULL && hwaddr[0] != NULL) { x_strncat (cfile->inbuf, " {\nhardware ", LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, hwaddr[0]->bv_val, LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, ";\n", LDAP_BUFFER_SIZE); ldap_value_free_len (hwaddr); } item->close_brace = 1; ldap_value_free_len (tempbv); } static void ldap_parse_shared_network (struct ldap_config_stack *item, struct parse *cfile) { struct berval **tempbv; if ((tempbv = ldap_get_values_len (ld, item->ldent, "cn")) == NULL || tempbv[0] == NULL) { if (tempbv != NULL) ldap_value_free_len (tempbv); return; } x_strncat (cfile->inbuf, "shared-network \"", LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, tempbv[0]->bv_val, LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, "\" {\n", LDAP_BUFFER_SIZE); item->close_brace = 1; ldap_value_free_len (tempbv); } static void parse_netmask (int netmask, char *netmaskbuf) { unsigned long nm; int i; nm = 0; for (i=1; i <= netmask; i++) { nm |= 1 << (32 - i); } sprintf (netmaskbuf, "%d.%d.%d.%d", (int) (nm >> 24) & 0xff, (int) (nm >> 16) & 0xff, (int) (nm >> 8) & 0xff, (int) nm & 0xff); } static void ldap_parse_subnet (struct ldap_config_stack *item, struct parse *cfile) { struct berval **tempbv, **netmaskstr; char netmaskbuf[sizeof("255.255.255.255")]; int i; if ((tempbv = ldap_get_values_len (ld, item->ldent, "cn")) == NULL || tempbv[0] == NULL) { if (tempbv != NULL) ldap_value_free_len (tempbv); return; } if ((netmaskstr = ldap_get_values_len (ld, item->ldent, "dhcpNetmask")) == NULL || netmaskstr[0] == NULL) { if (netmaskstr != NULL) ldap_value_free_len (netmaskstr); ldap_value_free_len (tempbv); return; } x_strncat (cfile->inbuf, "subnet ", LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, tempbv[0]->bv_val, LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, " netmask ", LDAP_BUFFER_SIZE); parse_netmask (strtol (netmaskstr[0]->bv_val, NULL, 10), netmaskbuf); x_strncat (cfile->inbuf, netmaskbuf, LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, " {\n", LDAP_BUFFER_SIZE); ldap_value_free_len (tempbv); ldap_value_free_len (netmaskstr); if ((tempbv = ldap_get_values_len (ld, item->ldent, "dhcpRange")) != NULL) { for (i=0; tempbv[i] != NULL; i++) { x_strncat (cfile->inbuf, "range", LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, " ", LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, tempbv[i]->bv_val, LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, ";\n", LDAP_BUFFER_SIZE); } } item->close_brace = 1; } static void ldap_parse_pool (struct ldap_config_stack *item, struct parse *cfile) { struct berval **tempbv; int i; x_strncat (cfile->inbuf, "pool {\n", LDAP_BUFFER_SIZE); if ((tempbv = ldap_get_values_len (ld, item->ldent, "dhcpRange")) != NULL) { x_strncat (cfile->inbuf, "range", LDAP_BUFFER_SIZE); for (i=0; tempbv[i] != NULL; i++) { x_strncat (cfile->inbuf, " ", LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, tempbv[i]->bv_val, LDAP_BUFFER_SIZE); } x_strncat (cfile->inbuf, ";\n", LDAP_BUFFER_SIZE); ldap_value_free_len (tempbv); } if ((tempbv = ldap_get_values_len (ld, item->ldent, "dhcpPermitList")) != NULL) { for (i=0; tempbv[i] != NULL; i++) { x_strncat (cfile->inbuf, tempbv[i]->bv_val, LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, ";\n", LDAP_BUFFER_SIZE); } ldap_value_free_len (tempbv); } item->close_brace = 1; } static void ldap_parse_group (struct ldap_config_stack *item, struct parse *cfile) { x_strncat (cfile->inbuf, "group {\n", LDAP_BUFFER_SIZE); item->close_brace = 1; } static void ldap_parse_key (struct ldap_config_stack *item, struct parse *cfile) { struct berval **tempbv; if ((tempbv = ldap_get_values_len (ld, item->ldent, "cn")) != NULL) { x_strncat (cfile->inbuf, "key ", LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, tempbv[0]->bv_val, LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, " {\n", LDAP_BUFFER_SIZE); ldap_value_free_len (tempbv); } if ((tempbv = ldap_get_values_len (ld, item->ldent, "dhcpKeyAlgorithm")) != NULL) { x_strncat (cfile->inbuf, "algorithm ", LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, tempbv[0]->bv_val, LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, ";\n", LDAP_BUFFER_SIZE); ldap_value_free_len (tempbv); } if ((tempbv = ldap_get_values_len (ld, item->ldent, "dhcpKeySecret")) != NULL) { x_strncat (cfile->inbuf, "secret ", LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, tempbv[0]->bv_val, LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, ";\n", LDAP_BUFFER_SIZE); ldap_value_free_len (tempbv); } item->close_brace = 1; } static void ldap_parse_zone (struct ldap_config_stack *item, struct parse *cfile) { char *cnFindStart, *cnFindEnd; struct berval **tempbv; char *keyCn; size_t len; if ((tempbv = ldap_get_values_len (ld, item->ldent, "cn")) != NULL) { x_strncat (cfile->inbuf, "zone ", LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, tempbv[0]->bv_val, LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, " {\n", LDAP_BUFFER_SIZE); ldap_value_free_len (tempbv); } if ((tempbv = ldap_get_values_len (ld, item->ldent, "dhcpDnsZoneServer")) != NULL) { x_strncat (cfile->inbuf, "primary ", LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, tempbv[0]->bv_val, LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, ";\n", LDAP_BUFFER_SIZE); ldap_value_free_len (tempbv); } if ((tempbv = ldap_get_values_len (ld, item->ldent, "dhcpKeyDN")) != NULL) { cnFindStart = strchr(tempbv[0]->bv_val,'='); if (cnFindStart != NULL) cnFindEnd = strchr(++cnFindStart,','); else cnFindEnd = NULL; if (cnFindEnd != NULL && cnFindEnd > cnFindStart) { len = cnFindEnd - cnFindStart; keyCn = dmalloc (len + 1, MDL); } else { len = 0; keyCn = NULL; } if (keyCn != NULL) { strncpy (keyCn, cnFindStart, len); keyCn[len] = '\0'; x_strncat (cfile->inbuf, "key ", LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, keyCn, LDAP_BUFFER_SIZE); x_strncat (cfile->inbuf, ";\n", LDAP_BUFFER_SIZE); dfree (keyCn, MDL); } ldap_value_free_len (tempbv); } item->close_brace = 1; } static void add_to_config_stack (LDAPMessage * res, LDAPMessage * ent) { struct ldap_config_stack *ns; ns = dmalloc (sizeof (*ns), MDL); ns->res = res; ns->ldent = ent; ns->close_brace = 0; ns->processed = 0; ns->next = ldap_stack; ldap_stack = ns; } static void ldap_stop() { struct sigaction old, new; if (ld == NULL) return; /* ** ldap_unbind after a LDAP_SERVER_DOWN result ** causes a SIGPIPE and dhcpd gets terminated, ** since it doesn't handle it... */ new.sa_flags = 0; new.sa_handler = SIG_IGN; sigemptyset (&new.sa_mask); sigaction (SIGPIPE, &new, &old); ldap_unbind_ext_s (ld, NULL, NULL); ld = NULL; sigaction (SIGPIPE, &old, &new); } static char * _do_lookup_dhcp_string_option (struct option_state *options, int option_name) { struct option_cache *oc; struct data_string db; char *ret; memset (&db, 0, sizeof (db)); oc = lookup_option (&server_universe, options, option_name); if (oc && evaluate_option_cache (&db, (struct packet*) NULL, (struct lease *) NULL, (struct client_state *) NULL, options, (struct option_state *) NULL, &global_scope, oc, MDL) && db.data != NULL && *db.data != '\0') { ret = dmalloc (db.len + 1, MDL); if (ret == NULL) log_fatal ("no memory for ldap option %d value", option_name); memcpy (ret, db.data, db.len); ret[db.len] = 0; data_string_forget (&db, MDL); } else ret = NULL; return (ret); } static int _do_lookup_dhcp_int_option (struct option_state *options, int option_name) { struct option_cache *oc; struct data_string db; int ret; memset (&db, 0, sizeof (db)); oc = lookup_option (&server_universe, options, option_name); if (oc && evaluate_option_cache (&db, (struct packet*) NULL, (struct lease *) NULL, (struct client_state *) NULL, options, (struct option_state *) NULL, &global_scope, oc, MDL) && db.data != NULL && *db.data != '\0') { ret = strtol ((const char *) db.data, NULL, 10); data_string_forget (&db, MDL); } else ret = 0; return (ret); } static int _do_lookup_dhcp_enum_option (struct option_state *options, int option_name) { struct option_cache *oc; struct data_string db; int ret = -1; memset (&db, 0, sizeof (db)); oc = lookup_option (&server_universe, options, option_name); if (oc && evaluate_option_cache (&db, (struct packet*) NULL, (struct lease *) NULL, (struct client_state *) NULL, options, (struct option_state *) NULL, &global_scope, oc, MDL) && db.data != NULL && *db.data != '\0') { if (db.len == 1) ret = db.data [0]; else log_fatal ("invalid option name %d", option_name); data_string_forget (&db, MDL); } else ret = 0; return (ret); } int ldap_rebind_cb (LDAP *ld, LDAP_CONST char *url, ber_tag_t request, ber_int_t msgid, void *parms) { int ret; LDAPURLDesc *ldapurl = NULL; char *who = NULL; struct berval creds; log_info("LDAP rebind to '%s'", url); if ((ret = ldap_url_parse(url, &ldapurl)) != LDAP_SUCCESS) { log_error ("Error: Can not parse ldap rebind url '%s': %s", url, ldap_err2string(ret)); return ret; } #if defined (LDAP_USE_SSL) if (strcasecmp(ldapurl->lud_scheme, "ldaps") == 0) { int opt = LDAP_OPT_X_TLS_HARD; if ((ret = ldap_set_option (ld, LDAP_OPT_X_TLS, &opt)) != LDAP_SUCCESS) { log_error ("Error: Cannot init LDAPS session to %s:%d: %s", ldapurl->lud_host, ldapurl->lud_port, ldap_err2string (ret)); return ret; } else { log_info ("LDAPS session successfully enabled to %s", ldap_server); } } else if (strcasecmp(ldapurl->lud_scheme, "ldap") == 0 && ldap_use_ssl != LDAP_SSL_OFF) { if ((ret = ldap_start_tls_s (ld, NULL, NULL)) != LDAP_SUCCESS) { log_error ("Error: Cannot start TLS session to %s:%d: %s", ldapurl->lud_host, ldapurl->lud_port, ldap_err2string (ret)); return ret; } else { log_info ("TLS session successfully started to %s:%d", ldapurl->lud_host, ldapurl->lud_port); } } #endif if (ldap_username != NULL || *ldap_username != '\0') { who = ldap_username; creds.bv_val = strdup(ldap_password); creds.bv_len = strlen(ldap_password); } if ((ret = ldap_sasl_bind_s (ld, who, LDAP_SASL_SIMPLE, &creds, NULL, NULL, NULL)) != LDAP_SUCCESS) { log_error ("Error: Cannot login into ldap server %s:%d: %s", ldapurl->lud_host, ldapurl->lud_port, ldap_err2string (ret)); } return ret; } static void ldap_start (void) { struct option_state *options; int ret, version; char *uri = NULL; struct berval creds; if (ld != NULL) return; if (ldap_server == NULL) { options = NULL; option_state_allocate (&options, MDL); execute_statements_in_scope (NULL, NULL, NULL, NULL, NULL, options, &global_scope, root_group, NULL, NULL); ldap_server = _do_lookup_dhcp_string_option (options, SV_LDAP_SERVER); ldap_dhcp_server_cn = _do_lookup_dhcp_string_option (options, SV_LDAP_DHCP_SERVER_CN); ldap_port = _do_lookup_dhcp_int_option (options, SV_LDAP_PORT); ldap_base_dn = _do_lookup_dhcp_string_option (options, SV_LDAP_BASE_DN); ldap_method = _do_lookup_dhcp_enum_option (options, SV_LDAP_METHOD); ldap_debug_file = _do_lookup_dhcp_string_option (options, SV_LDAP_DEBUG_FILE); ldap_referrals = _do_lookup_dhcp_enum_option (options, SV_LDAP_REFERRALS); #if defined (LDAP_USE_SSL) ldap_use_ssl = _do_lookup_dhcp_enum_option (options, SV_LDAP_SSL); if( ldap_use_ssl != LDAP_SSL_OFF) { ldap_tls_reqcert = _do_lookup_dhcp_enum_option (options, SV_LDAP_TLS_REQCERT); ldap_tls_ca_file = _do_lookup_dhcp_string_option (options, SV_LDAP_TLS_CA_FILE); ldap_tls_ca_dir = _do_lookup_dhcp_string_option (options, SV_LDAP_TLS_CA_DIR); ldap_tls_cert = _do_lookup_dhcp_string_option (options, SV_LDAP_TLS_CERT); ldap_tls_key = _do_lookup_dhcp_string_option (options, SV_LDAP_TLS_KEY); ldap_tls_crlcheck = _do_lookup_dhcp_enum_option (options, SV_LDAP_TLS_CRLCHECK); ldap_tls_ciphers = _do_lookup_dhcp_string_option (options, SV_LDAP_TLS_CIPHERS); ldap_tls_randfile = _do_lookup_dhcp_string_option (options, SV_LDAP_TLS_RANDFILE); } #endif #if defined (LDAP_CASA_AUTH) if (!load_uname_pwd_from_miCASA(&ldap_username,&ldap_password)) { #if defined (DEBUG_LDAP) log_info ("Authentication credential taken from file"); #endif #endif ldap_username = _do_lookup_dhcp_string_option (options, SV_LDAP_USERNAME); ldap_password = _do_lookup_dhcp_string_option (options, SV_LDAP_PASSWORD); #if defined (LDAP_CASA_AUTH) } #endif option_state_dereference (&options, MDL); } if (ldap_server == NULL || ldap_base_dn == NULL) { log_info ("Not searching LDAP since ldap-server, ldap-port and ldap-base-dn were not specified in the config file"); ldap_method = LDAP_METHOD_STATIC; return; } if (ldap_debug_file != NULL && ldap_debug_fd == -1) { if ((ldap_debug_fd = open (ldap_debug_file, O_CREAT | O_TRUNC | O_WRONLY, S_IRUSR | S_IWUSR)) < 0) log_error ("Error opening debug LDAP log file %s: %s", ldap_debug_file, strerror (errno)); } #if defined (DEBUG_LDAP) log_info ("Connecting to LDAP server %s:%d", ldap_server, ldap_port); #endif #if defined (LDAP_USE_SSL) if (ldap_use_ssl == -1) { /* ** There was no "ldap-ssl" option in dhcpd.conf (also not "off"). ** Let's try, if we can use an anonymous TLS session without to ** verify the server certificate -- if not continue without TLS. */ int opt = LDAP_OPT_X_TLS_ALLOW; if ((ret = ldap_set_option (NULL, LDAP_OPT_X_TLS_REQUIRE_CERT, &opt)) != LDAP_SUCCESS) { log_error ("Warning: Cannot set LDAP TLS require cert option to 'allow': %s", ldap_err2string (ret)); } } if (ldap_use_ssl != LDAP_SSL_OFF) { if (ldap_tls_reqcert != -1) { if ((ret = ldap_set_option (NULL, LDAP_OPT_X_TLS_REQUIRE_CERT, &ldap_tls_reqcert)) != LDAP_SUCCESS) { log_error ("Cannot set LDAP TLS require cert option: %s", ldap_err2string (ret)); } } if( ldap_tls_ca_file != NULL) { if ((ret = ldap_set_option (NULL, LDAP_OPT_X_TLS_CACERTFILE, ldap_tls_ca_file)) != LDAP_SUCCESS) { log_error ("Cannot set LDAP TLS CA certificate file %s: %s", ldap_tls_ca_file, ldap_err2string (ret)); } } if( ldap_tls_ca_dir != NULL) { if ((ret = ldap_set_option (NULL, LDAP_OPT_X_TLS_CACERTDIR, ldap_tls_ca_dir)) != LDAP_SUCCESS) { log_error ("Cannot set LDAP TLS CA certificate dir %s: %s", ldap_tls_ca_dir, ldap_err2string (ret)); } } if( ldap_tls_cert != NULL) { if ((ret = ldap_set_option (NULL, LDAP_OPT_X_TLS_CERTFILE, ldap_tls_cert)) != LDAP_SUCCESS) { log_error ("Cannot set LDAP TLS client certificate file %s: %s", ldap_tls_cert, ldap_err2string (ret)); } } if( ldap_tls_key != NULL) { if ((ret = ldap_set_option (NULL, LDAP_OPT_X_TLS_KEYFILE, ldap_tls_key)) != LDAP_SUCCESS) { log_error ("Cannot set LDAP TLS certificate key file %s: %s", ldap_tls_key, ldap_err2string (ret)); } } if( ldap_tls_crlcheck != -1) { int opt = ldap_tls_crlcheck; if ((ret = ldap_set_option (NULL, LDAP_OPT_X_TLS_CRLCHECK, &opt)) != LDAP_SUCCESS) { log_error ("Cannot set LDAP TLS crl check option: %s", ldap_err2string (ret)); } } if( ldap_tls_ciphers != NULL) { if ((ret = ldap_set_option (NULL, LDAP_OPT_X_TLS_CIPHER_SUITE, ldap_tls_ciphers)) != LDAP_SUCCESS) { log_error ("Cannot set LDAP TLS cipher suite %s: %s", ldap_tls_ciphers, ldap_err2string (ret)); } } if( ldap_tls_randfile != NULL) { if ((ret = ldap_set_option (NULL, LDAP_OPT_X_TLS_RANDOM_FILE, ldap_tls_randfile)) != LDAP_SUCCESS) { log_error ("Cannot set LDAP TLS random file %s: %s", ldap_tls_randfile, ldap_err2string (ret)); } } } #endif /* enough for 'ldap://+ + hostname + ':' + port number */ uri = malloc(strlen(ldap_server) + 16); if (uri == NULL) { log_error ("Cannot build ldap init URI %s:%d", ldap_server, ldap_port); return; } sprintf(uri, "ldap://%s:%d", ldap_server, ldap_port); ldap_initialize(&ld, uri); if (ld == NULL) { log_error ("Cannot init ldap session to %s:%d", ldap_server, ldap_port); return; } free(uri); version = LDAP_VERSION3; if ((ret = ldap_set_option (ld, LDAP_OPT_PROTOCOL_VERSION, &version)) != LDAP_OPT_SUCCESS) { log_error ("Cannot set LDAP version to %d: %s", version, ldap_err2string (ret)); } if (ldap_referrals != -1) { if ((ret = ldap_set_option (ld, LDAP_OPT_REFERRALS, ldap_referrals ? LDAP_OPT_ON : LDAP_OPT_OFF)) != LDAP_OPT_SUCCESS) { log_error ("Cannot %s LDAP referrals option: %s", (ldap_referrals ? "enable" : "disable"), ldap_err2string (ret)); } } if ((ret = ldap_set_rebind_proc(ld, ldap_rebind_cb, NULL)) != LDAP_SUCCESS) { log_error ("Warning: Cannot set ldap rebind procedure: %s", ldap_err2string (ret)); } #if defined (LDAP_USE_SSL) if (ldap_use_ssl == LDAP_SSL_LDAPS || (ldap_use_ssl == LDAP_SSL_ON && ldap_port == LDAPS_PORT)) { int opt = LDAP_OPT_X_TLS_HARD; if ((ret = ldap_set_option (ld, LDAP_OPT_X_TLS, &opt)) != LDAP_SUCCESS) { log_error ("Error: Cannot init LDAPS session to %s:%d: %s", ldap_server, ldap_port, ldap_err2string (ret)); ldap_stop(); return; } else { log_info ("LDAPS session successfully enabled to %s:%d", ldap_server, ldap_port); } } else if (ldap_use_ssl != LDAP_SSL_OFF) { if ((ret = ldap_start_tls_s (ld, NULL, NULL)) != LDAP_SUCCESS) { log_error ("Error: Cannot start TLS session to %s:%d: %s", ldap_server, ldap_port, ldap_err2string (ret)); ldap_stop(); return; } else { log_info ("TLS session successfully started to %s:%d", ldap_server, ldap_port); } } #endif if (ldap_username != NULL && *ldap_username != '\0') { creds.bv_val = strdup(ldap_password); creds.bv_len = strlen(ldap_password); if ((ret = ldap_sasl_bind_s (ld, ldap_username, LDAP_SASL_SIMPLE, &creds, NULL, NULL, NULL)) != LDAP_SUCCESS) { log_error ("Error: Cannot login into ldap server %s:%d: %s", ldap_server, ldap_port, ldap_err2string (ret)); ldap_stop(); return; } } #if defined (DEBUG_LDAP) log_info ("Successfully logged into LDAP server %s", ldap_server); #endif } static void parse_external_dns (LDAPMessage * ent) { char *search[] = {"dhcpOptionsDN", "dhcpSharedNetworkDN", "dhcpSubnetDN", "dhcpGroupDN", "dhcpHostDN", "dhcpClassesDN", "dhcpPoolDN", NULL}; LDAPMessage * newres, * newent; struct berval **tempbv; int i, j, ret; #if defined (DEBUG_LDAP) char *dn; dn = ldap_get_dn (ld, ent); if (dn != NULL) { log_info ("Parsing external DNs for '%s'", dn); ldap_memfree (dn); } #endif if (ld == NULL) ldap_start (); if (ld == NULL) return; for (i=0; search[i] != NULL; i++) { if ((tempbv = ldap_get_values_len (ld, ent, search[i])) == NULL) continue; for (j=0; tempbv[j] != NULL; j++) { if (*tempbv[j]->bv_val == '\0') continue; if ((ret = ldap_search_ext_s(ld, tempbv[j]->bv_val, LDAP_SCOPE_BASE, "objectClass=*", NULL, 0, NULL, NULL, NULL, 0, &newres)) != LDAP_SUCCESS) { ldap_value_free_len (tempbv); ldap_stop(); return; } #if defined (DEBUG_LDAP) log_info ("Adding contents of subtree '%s' to config stack from '%s' reference", tempbv[j], search[i]); #endif for (newent = ldap_first_entry (ld, newres); newent != NULL; newent = ldap_next_entry (ld, newent)) { #if defined (DEBUG_LDAP) dn = ldap_get_dn (ld, newent); if (dn != NULL) { log_info ("Adding LDAP result set starting with '%s' to config stack", dn); ldap_memfree (dn); } #endif add_to_config_stack (newres, newent); /* don't free newres here */ } } ldap_value_free_len (tempbv); } } static void free_stack_entry (struct ldap_config_stack *item) { struct ldap_config_stack *look_ahead_pointer = item; int may_free_msg = 1; while (look_ahead_pointer->next != NULL) { look_ahead_pointer = look_ahead_pointer->next; if (look_ahead_pointer->res == item->res) { may_free_msg = 0; break; } } if (may_free_msg) ldap_msgfree (item->res); dfree (item, MDL); } static void next_ldap_entry (struct parse *cfile) { struct ldap_config_stack *temp_stack; if (ldap_stack != NULL && ldap_stack->close_brace) { x_strncat (cfile->inbuf, "}\n", LDAP_BUFFER_SIZE); ldap_stack->close_brace = 0; } while (ldap_stack != NULL && (ldap_stack->ldent == NULL || (ldap_stack->ldent = ldap_next_entry (ld, ldap_stack->ldent)) == NULL)) { if (ldap_stack->close_brace) { x_strncat (cfile->inbuf, "}\n", LDAP_BUFFER_SIZE); ldap_stack->close_brace = 0; } temp_stack = ldap_stack; ldap_stack = ldap_stack->next; free_stack_entry (temp_stack); } if (ldap_stack != NULL && ldap_stack->close_brace) { x_strncat (cfile->inbuf, "}\n", LDAP_BUFFER_SIZE); ldap_stack->close_brace = 0; } } static char check_statement_end (const char *statement) { char *ptr; if (statement == NULL || *statement == '\0') return ('\0'); /* ** check if it ends with "}", e.g.: ** "zone my.domain. { ... }" ** optionally followed by spaces */ ptr = strrchr (statement, '}'); if (ptr != NULL) { /* skip following white-spaces */ for (++ptr; isspace ((int)*ptr); ptr++); /* check if we reached the end */ if (*ptr == '\0') return ('}'); /* yes, block end */ else return (*ptr); } /* ** this should not happen, but... ** check if it ends with ";", e.g.: ** "authoritative;" ** optionally followed by spaces */ ptr = strrchr (statement, ';'); if (ptr != NULL) { /* skip following white-spaces */ for (++ptr; isspace ((int)*ptr); ptr++); /* check if we reached the end */ if (*ptr == '\0') return (';'); /* ends with a ; */ else return (*ptr); } return ('\0'); } static isc_result_t ldap_parse_entry_options (LDAPMessage *ent, char *buffer, size_t size, int *lease_limit) { struct berval **tempbv; int i; if (ent == NULL || buffer == NULL || size == 0) return (ISC_R_FAILURE); if ((tempbv = ldap_get_values_len (ld, ent, "dhcpStatements")) != NULL) { for (i=0; tempbv[i] != NULL; i++) { if (lease_limit != NULL && strncasecmp ("lease limit ", tempbv[i]->bv_val, 12) == 0) { *lease_limit = (int) strtol ((tempbv[i]->bv_val) + 12, NULL, 10); continue; } x_strncat (buffer, tempbv[i]->bv_val, size); switch((int) check_statement_end (tempbv[i]->bv_val)) { case '}': case ';': x_strncat (buffer, "\n", size); break; default: x_strncat (buffer, ";\n", size); break; } } ldap_value_free_len (tempbv); } if ((tempbv = ldap_get_values_len (ld, ent, "dhcpOption")) != NULL) { for (i=0; tempbv[i] != NULL; i++) { x_strncat (buffer, "option ", size); x_strncat (buffer, tempbv[i]->bv_val, size); switch ((int) check_statement_end (tempbv[i]->bv_val)) { case ';': x_strncat (buffer, "\n", size); break; default: x_strncat (buffer, ";\n", size); break; } } ldap_value_free_len (tempbv); } return (ISC_R_SUCCESS); } static void ldap_generate_config_string (struct parse *cfile) { struct berval **objectClass; char *dn; struct ldap_config_stack *entry; LDAPMessage * ent, * res; int i, ignore, found; int ret; if (ld == NULL) ldap_start (); if (ld == NULL) return; entry = ldap_stack; if ((objectClass = ldap_get_values_len (ld, entry->ldent, "objectClass")) == NULL) return; ignore = 0; found = 1; for (i=0; objectClass[i] != NULL; i++) { if (strcasecmp (objectClass[i]->bv_val, "dhcpSharedNetwork") == 0) ldap_parse_shared_network (entry, cfile); else if (strcasecmp (objectClass[i]->bv_val, "dhcpClass") == 0) ldap_parse_class (entry, cfile); else if (strcasecmp (objectClass[i]->bv_val, "dhcpSubnet") == 0) ldap_parse_subnet (entry, cfile); else if (strcasecmp (objectClass[i]->bv_val, "dhcpPool") == 0) ldap_parse_pool (entry, cfile); else if (strcasecmp (objectClass[i]->bv_val, "dhcpGroup") == 0) ldap_parse_group (entry, cfile); else if (strcasecmp (objectClass[i]->bv_val, "dhcpTSigKey") == 0) ldap_parse_key (entry, cfile); else if (strcasecmp (objectClass[i]->bv_val, "dhcpDnsZone") == 0) ldap_parse_zone (entry, cfile); else if (strcasecmp (objectClass[i]->bv_val, "dhcpHost") == 0) { if (ldap_method == LDAP_METHOD_STATIC) ldap_parse_host (entry, cfile); else { ignore = 1; break; } } else if (strcasecmp (objectClass[i]->bv_val, "dhcpSubClass") == 0) { if (ldap_method == LDAP_METHOD_STATIC) ldap_parse_subclass (entry, cfile); else { ignore = 1; break; } } else found = 0; if (found && cfile->inbuf[0] == '\0') { ignore = 1; break; } } ldap_value_free_len (objectClass); if (ignore) { next_ldap_entry (cfile); return; } ldap_parse_entry_options(entry->ldent, cfile->inbuf, LDAP_BUFFER_SIZE-1, NULL); dn = ldap_get_dn (ld, entry->ldent); #if defined(DEBUG_LDAP) if (dn != NULL) log_info ("Found LDAP entry '%s'", dn); #endif if (dn == NULL || (ret = ldap_search_ext_s (ld, dn, LDAP_SCOPE_ONELEVEL, "objectClass=*", NULL, 0, NULL, NULL, NULL, 0, &res)) != LDAP_SUCCESS) { if (dn) ldap_memfree (dn); ldap_stop(); return; } ldap_memfree (dn); if ((ent = ldap_first_entry (ld, res)) != NULL) { add_to_config_stack (res, ent); parse_external_dns (entry->ldent); } else { ldap_msgfree (res); parse_external_dns (entry->ldent); next_ldap_entry (cfile); } } static void ldap_close_debug_fd() { if (ldap_debug_fd != -1) { close (ldap_debug_fd); ldap_debug_fd = -1; } } static void ldap_write_debug (const void *buff, size_t size) { if (ldap_debug_fd != -1) { if (write (ldap_debug_fd, buff, size) < 0) { log_error ("Error writing to LDAP debug file %s: %s." " Disabling log file.", ldap_debug_file, strerror (errno)); ldap_close_debug_fd(); } } } static int ldap_read_function (struct parse *cfile) { cfile->inbuf[0] = '\0'; cfile->buflen = 0; while (ldap_stack != NULL && *cfile->inbuf == '\0') ldap_generate_config_string (cfile); if (ldap_stack == NULL && *cfile->inbuf == '\0') return (EOF); cfile->bufix = 1; cfile->buflen = strlen (cfile->inbuf) - 1; if (cfile->buflen > 0) ldap_write_debug (cfile->inbuf, cfile->buflen); #if defined (DEBUG_LDAP) log_info ("Sending config line '%s'", cfile->inbuf); #endif return (cfile->inbuf[0]); } static char * ldap_get_host_name (LDAPMessage * ent) { struct berval **name; char *ret; ret = NULL; if ((name = ldap_get_values_len (ld, ent, "cn")) == NULL || name[0] == NULL) { if (name != NULL) ldap_value_free_len (name); #if defined (DEBUG_LDAP) ret = ldap_get_dn (ld, ent); if (ret != NULL) { log_info ("Cannot get cn attribute for LDAP entry %s", ret); ldap_memfree(ret); } #endif return (NULL); } ret = dmalloc (strlen (name[0]->bv_val) + 1, MDL); strcpy (ret, name[0]->bv_val); ldap_value_free_len (name); return (ret); } static int getfqhostname(char *fqhost, size_t size) { #if defined(MAXHOSTNAMELEN) char hname[MAXHOSTNAMELEN]; #else char hname[65]; #endif struct hostent *hp; if(NULL == fqhost || 1 >= size) return -1; memset(hname, 0, sizeof(hname)); if( gethostname(hname, sizeof(hname)-1)) return -1; if(NULL == (hp = gethostbyname(hname))) return -1; strncpy(fqhost, hp->h_name, size-1); fqhost[size-1] = '\0'; return 0; } isc_result_t ldap_read_config (void) { LDAPMessage * ldres, * hostres, * ent, * hostent; char hfilter[1024], sfilter[1024], fqdn[257]; char *buffer, *hostdn; ldap_dn_node *curr = NULL; struct parse *cfile; struct utsname unme; isc_result_t res; size_t length; int ret, cnt; struct berval **tempbv = NULL; if (ld == NULL) ldap_start (); if (ld == NULL) return (ldap_server == NULL ? ISC_R_SUCCESS : ISC_R_FAILURE); buffer = dmalloc (LDAP_BUFFER_SIZE+1, MDL); if (buffer == NULL) return (ISC_R_FAILURE); cfile = (struct parse *) NULL; res = new_parse (&cfile, -1, buffer, LDAP_BUFFER_SIZE, "LDAP", 0); if (res != ISC_R_SUCCESS) return (res); uname (&unme); if (ldap_dhcp_server_cn != NULL) { snprintf (hfilter, sizeof (hfilter), "(&(objectClass=dhcpServer)(cn=%s))", ldap_dhcp_server_cn); } else { if(0 == getfqhostname(fqdn, sizeof(fqdn))) { snprintf (hfilter, sizeof (hfilter), "(&(objectClass=dhcpServer)(|(cn=%s)(cn=%s)))", unme.nodename, fqdn); } else { snprintf (hfilter, sizeof (hfilter), "(&(objectClass=dhcpServer)(cn=%s))", unme.nodename); } } hostres = NULL; if ((ret = ldap_search_ext_s (ld, ldap_base_dn, LDAP_SCOPE_SUBTREE, hfilter, NULL, 0, NULL, NULL, NULL, 0, &hostres)) != LDAP_SUCCESS) { log_error ("Cannot find host LDAP entry %s %s", ((ldap_dhcp_server_cn == NULL)?(unme.nodename):(ldap_dhcp_server_cn)), hfilter); if(NULL != hostres) ldap_msgfree (hostres); ldap_stop(); return (ISC_R_FAILURE); } if ((hostent = ldap_first_entry (ld, hostres)) == NULL) { log_error ("Error: Cannot find LDAP entry matching %s", hfilter); ldap_msgfree (hostres); ldap_stop(); return (ISC_R_FAILURE); } hostdn = ldap_get_dn (ld, hostent); #if defined(DEBUG_LDAP) if (hostdn != NULL) log_info ("Found dhcpServer LDAP entry '%s'", hostdn); #endif if (hostdn == NULL || (tempbv = ldap_get_values_len (ld, hostent, "dhcpServiceDN")) == NULL || tempbv[0] == NULL) { log_error ("Error: Cannot find LDAP entry matching %s", hfilter); if (tempbv != NULL) ldap_value_free_len (tempbv); if (hostdn) ldap_memfree (hostdn); ldap_msgfree (hostres); ldap_stop(); return (ISC_R_FAILURE); } #if defined(DEBUG_LDAP) log_info ("LDAP: Parsing dhcpServer options '%s' ...", hostdn); #endif cfile->inbuf[0] = '\0'; ldap_parse_entry_options(hostent, cfile->inbuf, LDAP_BUFFER_SIZE, NULL); cfile->buflen = strlen (cfile->inbuf); if(cfile->buflen > 0) { ldap_write_debug (cfile->inbuf, cfile->buflen); res = conf_file_subparse (cfile, root_group, ROOT_GROUP); if (res != ISC_R_SUCCESS) { log_error ("LDAP: cannot parse dhcpServer entry '%s'", hostdn); ldap_memfree (hostdn); ldap_stop(); return res; } cfile->inbuf[0] = '\0'; } ldap_msgfree (hostres); /* ** attach ldap (tree) read function now */ cfile->bufix = cfile->buflen = 0; cfile->read_function = ldap_read_function; res = ISC_R_SUCCESS; for (cnt=0; tempbv[cnt] != NULL; cnt++) { snprintf(sfilter, sizeof(sfilter), "(&(objectClass=dhcpService)" "(|(dhcpPrimaryDN=%s)(dhcpSecondaryDN=%s)))", hostdn, hostdn); ldres = NULL; if ((ret = ldap_search_ext_s (ld, tempbv[cnt]->bv_val, LDAP_SCOPE_BASE, sfilter, NULL, 0, NULL, NULL, NULL, 0, &ldres)) != LDAP_SUCCESS) { log_error ("Error searching for dhcpServiceDN '%s': %s. Please update the LDAP entry '%s'", tempbv[cnt]->bv_val, ldap_err2string (ret), hostdn); if(NULL != ldres) ldap_msgfree(ldres); res = ISC_R_FAILURE; break; } if ((ent = ldap_first_entry (ld, ldres)) == NULL) { log_error ("Error: Cannot find dhcpService DN '%s' with primary or secondary server reference. Please update the LDAP server entry '%s'", tempbv[cnt]->bv_val, hostdn); ldap_msgfree(ldres); res = ISC_R_FAILURE; break; } /* ** FIXME: how to free the remembered dn's on exit? ** This should be OK if dmalloc registers the ** memory it allocated and frees it on exit.. */ curr = dmalloc (sizeof (*curr), MDL); if (curr != NULL) { length = strlen (tempbv[cnt]->bv_val); curr->dn = dmalloc (length + 1, MDL); if (curr->dn == NULL) { dfree (curr, MDL); curr = NULL; } else strcpy (curr->dn, tempbv[cnt]->bv_val); } if (curr != NULL) { curr->refs++; /* append to service-dn list */ if (ldap_service_dn_tail != NULL) ldap_service_dn_tail->next = curr; else ldap_service_dn_head = curr; ldap_service_dn_tail = curr; } else log_fatal ("no memory to remember ldap service dn"); #if defined (DEBUG_LDAP) log_info ("LDAP: Parsing dhcpService DN '%s' ...", tempbv[cnt]); #endif add_to_config_stack (ldres, ent); res = conf_file_subparse (cfile, root_group, ROOT_GROUP); if (res != ISC_R_SUCCESS) { log_error ("LDAP: cannot parse dhcpService entry '%s'", tempbv[cnt]->bv_val); break; } } end_parse (&cfile); ldap_close_debug_fd(); ldap_memfree (hostdn); ldap_value_free_len (tempbv); if (res != ISC_R_SUCCESS) { struct ldap_config_stack *temp_stack; while ((curr = ldap_service_dn_head) != NULL) { ldap_service_dn_head = curr->next; dfree (curr->dn, MDL); dfree (curr, MDL); } ldap_service_dn_tail = NULL; while ((temp_stack = ldap_stack) != NULL) { ldap_stack = temp_stack->next; free_stack_entry (temp_stack); } ldap_stop(); } /* Unbind from ldap immediately after reading config in static mode. */ if (ldap_method == LDAP_METHOD_STATIC) ldap_stop(); return (res); } /* This function will parse the dhcpOption and dhcpStatements field in the LDAP entry if it exists. Right now, type will be either HOST_DECL or CLASS_DECL. If we are parsing a HOST_DECL, this always returns 0. If we are parsing a CLASS_DECL, this will return what the current lease limit is in LDAP. If there is no lease limit specified, we return 0 */ static int ldap_parse_options (LDAPMessage * ent, struct group *group, int type, struct host_decl *host, struct class **class) { int declaration, lease_limit; char option_buffer[8192]; enum dhcp_token token; struct parse *cfile; isc_result_t res; const char *val; lease_limit = 0; *option_buffer = '\0'; /* This block of code will try to find the parent of the host, and if it is a group object, fetch the options and apply to the host. */ if (type == HOST_DECL) { char *hostdn, *basedn, *temp1, *temp2, filter[1024]; LDAPMessage *groupdn, *entry; int ret; hostdn = ldap_get_dn (ld, ent); if( hostdn != NULL) { basedn = NULL; temp1 = strchr (hostdn, '='); if (temp1 != NULL) temp1 = strchr (++temp1, '='); if (temp1 != NULL) temp2 = strchr (++temp1, ','); else temp2 = NULL; if (temp2 != NULL) { snprintf (filter, sizeof(filter), "(&(cn=%.*s)(objectClass=dhcpGroup))", (int)(temp2 - temp1), temp1); basedn = strchr (temp1, ','); if (basedn != NULL) ++basedn; } if (basedn != NULL && *basedn != '\0') { ret = ldap_search_ext_s (ld, basedn, LDAP_SCOPE_SUBTREE, filter, NULL, 0, NULL, NULL, NULL, 0, &groupdn); if (ret == LDAP_SUCCESS) { if ((entry = ldap_first_entry (ld, groupdn)) != NULL) { res = ldap_parse_entry_options (entry, option_buffer, sizeof(option_buffer) - 1, &lease_limit); if (res != ISC_R_SUCCESS) { /* reset option buffer discarding any results */ *option_buffer = '\0'; lease_limit = 0; } } ldap_msgfree( groupdn); } } ldap_memfree( hostdn); } } res = ldap_parse_entry_options (ent, option_buffer, sizeof(option_buffer) - 1, &lease_limit); if (res != ISC_R_SUCCESS) return (lease_limit); option_buffer[sizeof(option_buffer) - 1] = '\0'; if (*option_buffer == '\0') return (lease_limit); cfile = (struct parse *) NULL; res = new_parse (&cfile, -1, option_buffer, strlen (option_buffer), type == HOST_DECL ? "LDAP-HOST" : "LDAP-SUBCLASS", 0); if (res != ISC_R_SUCCESS) return (lease_limit); #if defined (DEBUG_LDAP) log_info ("Sending the following options: '%s'", option_buffer); #endif declaration = 0; do { token = peek_token (&val, NULL, cfile); if (token == END_OF_FILE) break; declaration = parse_statement (cfile, group, type, host, declaration); } while (1); end_parse (&cfile); return (lease_limit); } int find_haddr_in_ldap (struct host_decl **hp, int htype, unsigned hlen, const unsigned char *haddr, const char *file, int line) { char buf[128], *type_str; LDAPMessage * res, *ent; struct host_decl * host; isc_result_t status; ldap_dn_node *curr; int ret; if (ldap_method == LDAP_METHOD_STATIC) return (0); if (ld == NULL) ldap_start (); if (ld == NULL) return (0); switch (htype) { case HTYPE_ETHER: type_str = "ethernet"; break; case HTYPE_IEEE802: type_str = "token-ring"; break; case HTYPE_FDDI: type_str = "fddi"; break; default: log_info ("Ignoring unknown type %d", htype); return (0); } /* ** FIXME: It is not guaranteed, that the dhcpHWAddress attribute ** contains _exactly_ "type addr" with one space between! */ snprintf (buf, sizeof (buf), "(&(objectClass=dhcpHost)(dhcpHWAddress=%s %s))", type_str, print_hw_addr (htype, hlen, haddr)); res = ent = NULL; for (curr = ldap_service_dn_head; curr != NULL && *curr->dn != '\0'; curr = curr->next) { #if defined (DEBUG_LDAP) log_info ("Searching for %s in LDAP tree %s", buf, curr->dn); #endif ret = ldap_search_ext_s (ld, curr->dn, LDAP_SCOPE_SUBTREE, buf, NULL, 0, NULL, NULL, NULL, 0, &res); if(ret == LDAP_SERVER_DOWN) { log_info ("LDAP server was down, trying to reconnect..."); ldap_stop(); ldap_start(); if(ld == NULL) { log_info ("LDAP reconnect failed - try again later..."); return (0); } ret = ldap_search_ext_s (ld, curr->dn, LDAP_SCOPE_SUBTREE, buf, NULL, 0, NULL, NULL, NULL, 0, &res); } if (ret == LDAP_SUCCESS) { if( (ent = ldap_first_entry (ld, res)) != NULL) break; /* search OK and have entry */ #if defined (DEBUG_LDAP) log_info ("No host entry for %s in LDAP tree %s", buf, curr->dn); #endif if(res) { ldap_msgfree (res); res = NULL; } } else { if(res) { ldap_msgfree (res); res = NULL; } if (ret != LDAP_NO_SUCH_OBJECT && ret != LDAP_SUCCESS) { log_error ("Cannot search for %s in LDAP tree %s: %s", buf, curr->dn, ldap_err2string (ret)); ldap_stop(); return (0); } #if defined (DEBUG_LDAP) else { log_info ("ldap_search_ext_s returned %s when searching for %s in %s", ldap_err2string (ret), buf, curr->dn); } #endif } } if (res && ent) { #if defined (DEBUG_LDAP) char *dn = ldap_get_dn (ld, ent); if (dn != NULL) { log_info ("Found dhcpHWAddress LDAP entry %s", dn); ldap_memfree(dn); } #endif host = (struct host_decl *)0; status = host_allocate (&host, MDL); if (status != ISC_R_SUCCESS) { log_fatal ("can't allocate host decl struct: %s", isc_result_totext (status)); ldap_msgfree (res); return (0); } host->name = ldap_get_host_name (ent); if (host->name == NULL) { host_dereference (&host, MDL); ldap_msgfree (res); return (0); } if (!clone_group (&host->group, root_group, MDL)) { log_fatal ("can't clone group for host %s", host->name); host_dereference (&host, MDL); ldap_msgfree (res); return (0); } ldap_parse_options (ent, host->group, HOST_DECL, host, NULL); *hp = host; ldap_msgfree (res); return (1); } if(res) ldap_msgfree (res); return (0); } int find_subclass_in_ldap (struct class *class, struct class **newclass, struct data_string *data) { LDAPMessage * res, * ent; int ret, lease_limit; isc_result_t status; ldap_dn_node *curr; char buf[1024]; if (ldap_method == LDAP_METHOD_STATIC) return (0); if (ld == NULL) ldap_start (); if (ld == NULL) return (0); snprintf (buf, sizeof (buf), "(&(objectClass=dhcpSubClass)(cn=%s)(dhcpClassData=%s))", print_hex_1 (data->len, data->data, 60), print_hex_2 (strlen (class->name), (u_int8_t *) class->name, 60)); #if defined (DEBUG_LDAP) log_info ("Searching LDAP for %s", buf); #endif res = ent = NULL; for (curr = ldap_service_dn_head; curr != NULL && *curr->dn != '\0'; curr = curr->next) { #if defined (DEBUG_LDAP) log_info ("Searching for %s in LDAP tree %s", buf, curr->dn); #endif ret = ldap_search_ext_s (ld, curr->dn, LDAP_SCOPE_SUBTREE, buf, NULL, 0, NULL, NULL, NULL, 0, &res); if(ret == LDAP_SERVER_DOWN) { log_info ("LDAP server was down, trying to reconnect..."); ldap_stop(); ldap_start(); if(ld == NULL) { log_info ("LDAP reconnect failed - try again later..."); return (0); } ret = ldap_search_ext_s (ld, curr->dn, LDAP_SCOPE_SUBTREE, buf, NULL, 0, NULL, NULL, NULL, 0, &res); } if (ret == LDAP_SUCCESS) { if( (ent = ldap_first_entry (ld, res)) != NULL) break; /* search OK and have entry */ #if defined (DEBUG_LDAP) log_info ("No subclass entry for %s in LDAP tree %s", buf, curr->dn); #endif if(res) { ldap_msgfree (res); res = NULL; } } else { if(res) { ldap_msgfree (res); res = NULL; } if (ret != LDAP_NO_SUCH_OBJECT && ret != LDAP_SUCCESS) { log_error ("Cannot search for %s in LDAP tree %s: %s", buf, curr->dn, ldap_err2string (ret)); ldap_stop(); return (0); } #if defined (DEBUG_LDAP) else { log_info ("ldap_search_ext_s returned %s when searching for %s in %s", ldap_err2string (ret), buf, curr->dn); } #endif } } if (res && ent) { #if defined (DEBUG_LDAP) char *dn = ldap_get_dn (ld, ent); if (dn != NULL) { log_info ("Found subclass LDAP entry %s", dn); ldap_memfree(dn); } #endif status = class_allocate (newclass, MDL); if (status != ISC_R_SUCCESS) { log_error ("Cannot allocate memory for a new class"); ldap_msgfree (res); return (0); } group_reference (&(*newclass)->group, class->group, MDL); class_reference (&(*newclass)->superclass, class, MDL); lease_limit = ldap_parse_options (ent, (*newclass)->group, CLASS_DECL, NULL, newclass); if (lease_limit == 0) (*newclass)->lease_limit = class->lease_limit; else class->lease_limit = lease_limit; if ((*newclass)->lease_limit) { (*newclass)->billed_leases = dmalloc ((*newclass)->lease_limit * sizeof (struct lease *), MDL); if (!(*newclass)->billed_leases) { log_error ("no memory for billing"); class_dereference (newclass, MDL); ldap_msgfree (res); return (0); } memset ((*newclass)->billed_leases, 0, ((*newclass)->lease_limit * sizeof (struct lease *))); } data_string_copy (&(*newclass)->hash_string, data, MDL); ldap_msgfree (res); return (1); } if(res) ldap_msgfree (res); return (0); } #endif