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/>.
27 /**********************************************************************
28 Is this our primary domain ?
29 **********************************************************************/
32 static bool is_our_primary_domain(const char *domain)
34 int role = lp_server_role();
36 if ((role == ROLE_DOMAIN_MEMBER) && strequal(lp_workgroup(), domain)) {
38 } else if (strequal(get_global_sam_name(), domain)) {
45 /**************************************************************************
46 Find the name and IP address for a server in the realm/domain
47 *************************************************************************/
49 static bool ads_dc_name(const char *domain,
51 struct sockaddr_storage *dc_ss,
57 char addr[INET6_ADDRSTRLEN];
59 if (!realm && strequal(domain, lp_workgroup())) {
63 sitename = sitename_fetch(realm);
65 /* Try this 3 times then give up. */
66 for( i =0 ; i < 3; i++) {
67 ads = ads_init(realm, domain, NULL);
73 DEBUG(4,("ads_dc_name: domain=%s\n", domain));
76 /* we don't need to bind, just connect */
77 ads->auth.flags |= ADS_AUTH_NO_BIND;
81 if (!ads->config.realm) {
87 /* Now we've found a server, see if our sitename
88 has changed. If so, we need to re-do the DNS query
89 to ensure we only find servers in our site. */
91 if (stored_sitename_changed(realm, sitename)) {
93 sitename = sitename_fetch(realm);
95 /* Ensure we don't cache the DC we just connected to. */
96 namecache_delete(realm, 0x1C);
97 namecache_delete(domain, 0x1C);
102 if (is_our_primary_domain(domain) && (ads->config.flags & NBT_SERVER_KDC)) {
103 if (ads_closest_dc(ads)) {
104 /* We're going to use this KDC for this realm/domain.
105 If we are using sites, then force the krb5 libs
108 create_local_private_krb5_conf_for_domain(realm,
113 create_local_private_krb5_conf_for_domain(realm,
124 DEBUG(1,("ads_dc_name: sitename (now \"%s\") keeps changing ???\n",
125 sitename ? sitename : ""));
132 fstrcpy(srv_name, ads->config.ldap_server_name);
133 strupper_m(srv_name);
135 *dc_ss = ads->ldap.ss;
137 zero_sockaddr(dc_ss);
141 print_sockaddr(addr, sizeof(addr), dc_ss);
142 DEBUG(4,("ads_dc_name: using server='%s' IP=%s\n",
148 /****************************************************************************
149 Utility function to return the name of a DC. The name is guaranteed to be
150 valid since we have already done a name_status_find on it
151 ***************************************************************************/
153 static bool rpc_dc_name(const char *domain,
155 struct sockaddr_storage *ss_out)
157 struct ip_service *ip_list = NULL;
158 struct sockaddr_storage dc_ss;
161 char addr[INET6_ADDRSTRLEN];
163 /* get a list of all domain controllers */
165 if (!NT_STATUS_IS_OK(get_sorted_dc_list(domain, NULL, &ip_list, &count,
167 DEBUG(3, ("Could not look up dc's for domain %s\n", domain));
171 /* Remove the entry we've already failed with (should be the PDC). */
173 for (i = 0; i < count; i++) {
174 if (is_zero_addr((struct sockaddr *)&ip_list[i].ss))
177 if (name_status_find(domain, 0x1c, 0x20, &ip_list[i].ss, srv_name)) {
178 result = check_negative_conn_cache( domain, srv_name );
179 if ( NT_STATUS_IS_OK(result) ) {
180 dc_ss = ip_list[i].ss;
188 /* No-one to talk to )-: */
189 return False; /* Boo-hoo */
192 /* We have the netbios name and IP address of a domain controller.
193 Ideally we should sent a SAMLOGON request to determine whether
194 the DC is alive and kicking. If we can catch a dead DC before
195 performing a cli_connect() we can avoid a 30-second timeout. */
197 print_sockaddr(addr, sizeof(addr), &dc_ss);
198 DEBUG(3, ("rpc_dc_name: Returning DC %s (%s) for domain %s\n", srv_name,
207 /**********************************************************************
208 wrapper around ads and rpc methods of finds DC's
209 **********************************************************************/
211 bool get_dc_name(const char *domain,
214 struct sockaddr_storage *ss_out)
216 struct sockaddr_storage dc_ss;
218 bool our_domain = False;
220 zero_sockaddr(&dc_ss);
224 if ( strequal(lp_workgroup(), domain) || strequal(lp_realm(), realm) )
227 /* always try to obey what the admin specified in smb.conf
228 (for the local domain) */
230 if ( (our_domain && lp_security()==SEC_ADS) || realm ) {
231 ret = ads_dc_name(domain, realm, &dc_ss, srv_name);
235 /* if we have only the realm we can't do anything else */
240 /* fall back on rpc methods if the ADS methods fail */
241 ret = rpc_dc_name(domain, srv_name, &dc_ss);