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 2 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, write to the Free Software
22 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 /**********************************************************************
29 Is this our primary domain ?
30 **********************************************************************/
33 static BOOL is_our_primary_domain(const char *domain)
35 int role = lp_server_role();
37 if ((role == ROLE_DOMAIN_MEMBER) && strequal(lp_workgroup(), domain)) {
39 } else if (strequal(get_global_sam_name(), domain)) {
46 /**************************************************************************
47 Find the name and IP address for a server in the realm/domain
48 *************************************************************************/
50 static BOOL ads_dc_name(const char *domain,
52 struct in_addr *dc_ip,
56 char *sitename = sitename_fetch();
59 if (!realm && strequal(domain, lp_workgroup())) {
63 /* Try this 3 times then give up. */
64 for( i =0 ; i < 3; i++) {
65 ads = ads_init(realm, domain, NULL);
71 DEBUG(4,("ads_dc_name: domain=%s\n", domain));
74 /* we don't need to bind, just connect */
75 ads->auth.flags |= ADS_AUTH_NO_BIND;
79 if (!ads->config.realm) {
85 /* Now we've found a server, see if our sitename
86 has changed. If so, we need to re-do the DNS query
87 to ensure we only find servers in our site. */
89 if (stored_sitename_changed(sitename)) {
91 sitename = sitename_fetch();
93 /* Ensure we don't cache the DC we just connected to. */
94 namecache_delete(realm, 0x1C);
95 namecache_delete(domain, 0x1C);
100 if (is_our_primary_domain(domain) && (ads->config.flags & ADS_KDC) && ads_closest_dc(ads)) {
101 /* We're going to use this KDC for this realm/domain.
102 If we are using sites, then force the krb5 libs
105 create_local_private_krb5_conf_for_domain(realm,
114 DEBUG(1,("ads_dc_name: sitename (now \"%s\") keeps changing ???\n",
115 sitename ? sitename : ""));
122 fstrcpy(srv_name, ads->config.ldap_server_name);
123 strupper_m(srv_name);
124 *dc_ip = ads->ldap_ip;
127 DEBUG(4,("ads_dc_name: using server='%s' IP=%s\n",
128 srv_name, inet_ntoa(*dc_ip)));
133 /****************************************************************************
134 Utility function to return the name of a DC. The name is guaranteed to be
135 valid since we have already done a name_status_find on it
136 ***************************************************************************/
138 static BOOL rpc_dc_name(const char *domain, fstring srv_name, struct in_addr *ip_out)
140 struct ip_service *ip_list = NULL;
141 struct in_addr dc_ip, exclude_ip;
145 zero_ip(&exclude_ip);
147 /* get a list of all domain controllers */
149 if (!NT_STATUS_IS_OK(get_sorted_dc_list(domain, &ip_list, &count,
151 DEBUG(3, ("Could not look up dc's for domain %s\n", domain));
155 /* Remove the entry we've already failed with (should be the PDC). */
157 for (i = 0; i < count; i++) {
158 if (is_zero_ip(ip_list[i].ip))
161 if (name_status_find(domain, 0x1c, 0x20, ip_list[i].ip, srv_name)) {
162 result = check_negative_conn_cache( domain, srv_name );
163 if ( NT_STATUS_IS_OK(result) ) {
164 dc_ip = ip_list[i].ip;
173 /* No-one to talk to )-: */
174 return False; /* Boo-hoo */
177 /* We have the netbios name and IP address of a domain controller.
178 Ideally we should sent a SAMLOGON request to determine whether
179 the DC is alive and kicking. If we can catch a dead DC before
180 performing a cli_connect() we can avoid a 30-second timeout. */
182 DEBUG(3, ("rpc_dc_name: Returning DC %s (%s) for domain %s\n", srv_name,
183 inet_ntoa(dc_ip), domain));
192 /**********************************************************************
193 wrapper around ads and rpc methods of finds DC's
194 **********************************************************************/
196 BOOL get_dc_name(const char *domain, const char *realm, fstring srv_name, struct in_addr *ip_out)
198 struct in_addr dc_ip;
200 BOOL our_domain = False;
206 if ( strequal(lp_workgroup(), domain) || strequal(lp_realm(), realm) )
209 /* always try to obey what the admin specified in smb.conf
210 (for the local domain) */
212 if ( (our_domain && lp_security()==SEC_ADS) || realm ) {
213 ret = ads_dc_name(domain, realm, &dc_ip, srv_name);
217 /* fall back on rpc methods if the ADS methods fail */
218 ret = rpc_dc_name(domain, srv_name, &dc_ip);