2 Unix SMB/CIFS implementation.
4 Winbind daemon connection manager
6 Copyright (C) Tim Potter 2001
7 Copyright (C) Andrew Bartlett 2002
8 Copyright (C) Gerald Carter 2003
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
26 #include "libsmb/namequery.h"
27 #include "libads/sitename_cache.h"
29 #include "../librpc/gen_ndr/nbt.h"
30 #include "lib/param/loadparm.h"
31 #include "lib/util/string_wrappers.h"
33 /**********************************************************************
34 Is this our primary domain ?
35 **********************************************************************/
38 static bool is_our_primary_domain(const char *domain)
40 int role = lp_server_role();
42 if ((role == ROLE_DOMAIN_MEMBER) && strequal(lp_workgroup(), domain)) {
44 } else if (strequal(get_global_sam_name(), domain)) {
51 /**************************************************************************
52 Find the name and IP address for a server in the realm/domain
53 *************************************************************************/
55 static bool ads_dc_name(const char *domain,
57 struct sockaddr_storage *dc_ss,
63 char addr[INET6_ADDRSTRLEN];
65 if (!realm && strequal(domain, lp_workgroup())) {
69 sitename = sitename_fetch(talloc_tos(), realm);
71 /* Try this 3 times then give up. */
72 for( i =0 ; i < 3; i++) {
73 ads = ads_init(realm, domain, NULL, ADS_SASL_PLAIN);
75 TALLOC_FREE(sitename);
79 DEBUG(4,("ads_dc_name: domain=%s\n", domain));
82 /* we don't need to bind, just connect */
83 ads->auth.flags |= ADS_AUTH_NO_BIND;
87 if (!ads->config.realm) {
88 TALLOC_FREE(sitename);
93 /* Now we've found a server, see if our sitename
94 has changed. If so, we need to re-do the DNS query
95 to ensure we only find servers in our site. */
97 if (stored_sitename_changed(realm, sitename)) {
98 TALLOC_FREE(sitename);
99 sitename = sitename_fetch(talloc_tos(), realm);
101 /* Ensure we don't cache the DC we just connected to. */
102 namecache_delete(realm, 0x1C);
103 namecache_delete(domain, 0x1C);
108 if (is_our_primary_domain(domain) && (ads->config.flags & NBT_SERVER_KDC)) {
109 if (ads_closest_dc(ads)) {
110 /* We're going to use this KDC for this realm/domain.
111 If we are using sites, then force the krb5 libs
114 create_local_private_krb5_conf_for_domain(realm,
119 create_local_private_krb5_conf_for_domain(realm,
130 DEBUG(1,("ads_dc_name: sitename (now \"%s\") keeps changing ???\n",
131 sitename ? sitename : ""));
132 TALLOC_FREE(sitename);
137 TALLOC_FREE(sitename);
139 fstrcpy(srv_name, ads->config.ldap_server_name);
140 if (!strupper_m(srv_name)) {
145 *dc_ss = ads->ldap.ss;
147 zero_sockaddr(dc_ss);
151 print_sockaddr(addr, sizeof(addr), dc_ss);
152 DEBUG(4,("ads_dc_name: using server='%s' IP=%s\n",
158 /****************************************************************************
159 Utility function to return the name of a DC. The name is guaranteed to be
160 valid since we have already done a name_status_find on it
161 ***************************************************************************/
163 static bool rpc_dc_name(const char *domain,
165 struct sockaddr_storage *ss_out)
167 struct ip_service *ip_list = NULL;
169 struct sockaddr_storage dc_ss;
172 char addr[INET6_ADDRSTRLEN];
174 /* get a list of all domain controllers */
176 if (!NT_STATUS_IS_OK(get_sorted_dc_list(domain, NULL, &ip_list, &count,
178 DEBUG(3, ("Could not look up dc's for domain %s\n", domain));
182 /* Remove the entry we've already failed with (should be the PDC). */
184 for (i = 0; i < count; i++) {
185 if (is_zero_addr(&ip_list[i].ss))
188 if (name_status_find(domain, 0x1c, 0x20, &ip_list[i].ss, srv_name)) {
189 result = check_negative_conn_cache( domain, srv_name );
190 if ( NT_STATUS_IS_OK(result) ) {
191 dc_ss = ip_list[i].ss;
199 /* No-one to talk to )-: */
200 return False; /* Boo-hoo */
203 /* We have the netbios name and IP address of a domain controller.
204 Ideally we should sent a SAMLOGON request to determine whether
205 the DC is alive and kicking. If we can catch a dead DC before
206 performing a cli_connect() we can avoid a 30-second timeout. */
208 print_sockaddr(addr, sizeof(addr), &dc_ss);
209 DEBUG(3, ("rpc_dc_name: Returning DC %s (%s) for domain %s\n", srv_name,
218 /**********************************************************************
219 wrapper around ads and rpc methods of finds DC's
220 **********************************************************************/
222 bool get_dc_name(const char *domain,
225 struct sockaddr_storage *ss_out)
227 struct sockaddr_storage dc_ss;
229 bool our_domain = False;
231 zero_sockaddr(&dc_ss);
235 if ( strequal(lp_workgroup(), domain) || strequal(lp_realm(), realm) )
238 /* always try to obey what the admin specified in smb.conf
239 (for the local domain) */
241 if ( (our_domain && lp_security()==SEC_ADS) || realm ) {
242 ret = ads_dc_name(domain, realm, &dc_ss, srv_name);
246 /* if we have only the realm we can't do anything else */
251 /* fall back on rpc methods if the ADS methods fail */
252 ret = rpc_dc_name(domain, srv_name, &dc_ss);