diff options
author | David Hankins <dhankins@isc.org> | 2010-03-25 15:23:31 +0000 |
---|---|---|
committer | David Hankins <dhankins@isc.org> | 2010-03-25 15:23:31 +0000 |
commit | cf6bc0dad5b3d55de449837ed550508f80ee053b (patch) | |
tree | b01de6c564d72383036156a82794a4558c381e27 /server/ldap.c | |
parent | 2d5fba9b9bea410f12ef1b1adbd43c746610b352 (diff) | |
download | isc-dhcp-cf6bc0dad5b3d55de449837ed550508f80ee053b.tar.gz |
Adding missing files.
Diffstat (limited to 'server/ldap.c')
-rw-r--r-- | server/ldap.c | 2004 |
1 files changed, 2004 insertions, 0 deletions
diff --git a/server/ldap.c b/server/ldap.c new file mode 100644 index 00000000..5003228e --- /dev/null +++ b/server/ldap.c @@ -0,0 +1,2004 @@ +/* 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 <masneyb@ntelos.net>. Its + * development was sponsored by Ntelos, Inc. (www.ntelos.com). + */ + +#include "dhcpd.h" +#include <signal.h> +#include <errno.h> + +#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 ((struct binding_value **) NULL, + (struct packet *) NULL, (struct lease *) NULL, + (struct client_state *) NULL, (struct option_state *) NULL, + options, &global_scope, root_group, (struct group *) 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 (*newclass)->billed_leases)); + } + + data_string_copy (&(*newclass)->hash_string, data, MDL); + + ldap_msgfree (res); + return (1); + } + + if(res) ldap_msgfree (res); + return (0); +} + +#endif |