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 "libads/sitename_cache.h"
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 sockaddr_storage
*dc_ss
,
58 char addr
[INET6_ADDRSTRLEN
];
60 if (!realm
&& strequal(domain
, lp_workgroup())) {
64 sitename
= sitename_fetch(realm
);
66 /* Try this 3 times then give up. */
67 for( i
=0 ; i
< 3; i
++) {
68 ads
= ads_init(realm
, domain
, NULL
);
74 DEBUG(4,("ads_dc_name: domain=%s\n", domain
));
77 /* we don't need to bind, just connect */
78 ads
->auth
.flags
|= ADS_AUTH_NO_BIND
;
82 if (!ads
->config
.realm
) {
88 /* Now we've found a server, see if our sitename
89 has changed. If so, we need to re-do the DNS query
90 to ensure we only find servers in our site. */
92 if (stored_sitename_changed(realm
, sitename
)) {
94 sitename
= sitename_fetch(realm
);
96 /* Ensure we don't cache the DC we just connected to. */
97 namecache_delete(realm
, 0x1C);
98 namecache_delete(domain
, 0x1C);
103 if (is_our_primary_domain(domain
) && (ads
->config
.flags
& NBT_SERVER_KDC
)) {
104 if (ads_closest_dc(ads
)) {
105 /* We're going to use this KDC for this realm/domain.
106 If we are using sites, then force the krb5 libs
109 create_local_private_krb5_conf_for_domain(realm
,
113 ads
->config
.ldap_server_name
);
115 create_local_private_krb5_conf_for_domain(realm
,
119 ads
->config
.ldap_server_name
);
127 DEBUG(1,("ads_dc_name: sitename (now \"%s\") keeps changing ???\n",
128 sitename
? sitename
: ""));
135 fstrcpy(srv_name
, ads
->config
.ldap_server_name
);
136 strupper_m(srv_name
);
138 *dc_ss
= ads
->ldap
.ss
;
140 zero_sockaddr(dc_ss
);
144 print_sockaddr(addr
, sizeof(addr
), dc_ss
);
145 DEBUG(4,("ads_dc_name: using server='%s' IP=%s\n",
151 /****************************************************************************
152 Utility function to return the name of a DC. The name is guaranteed to be
153 valid since we have already done a name_status_find on it
154 ***************************************************************************/
156 static bool rpc_dc_name(const char *domain
,
158 struct sockaddr_storage
*ss_out
)
160 struct ip_service
*ip_list
= NULL
;
161 struct sockaddr_storage dc_ss
;
164 char addr
[INET6_ADDRSTRLEN
];
166 /* get a list of all domain controllers */
168 if (!NT_STATUS_IS_OK(get_sorted_dc_list(domain
, NULL
, &ip_list
, &count
,
170 DEBUG(3, ("Could not look up dc's for domain %s\n", domain
));
174 /* Remove the entry we've already failed with (should be the PDC). */
176 for (i
= 0; i
< count
; i
++) {
177 if (is_zero_addr((struct sockaddr
*)&ip_list
[i
].ss
))
180 if (name_status_find(domain
, 0x1c, 0x20, &ip_list
[i
].ss
, srv_name
)) {
181 result
= check_negative_conn_cache( domain
, srv_name
);
182 if ( NT_STATUS_IS_OK(result
) ) {
183 dc_ss
= ip_list
[i
].ss
;
191 /* No-one to talk to )-: */
192 return False
; /* Boo-hoo */
195 /* We have the netbios name and IP address of a domain controller.
196 Ideally we should sent a SAMLOGON request to determine whether
197 the DC is alive and kicking. If we can catch a dead DC before
198 performing a cli_connect() we can avoid a 30-second timeout. */
200 print_sockaddr(addr
, sizeof(addr
), &dc_ss
);
201 DEBUG(3, ("rpc_dc_name: Returning DC %s (%s) for domain %s\n", srv_name
,
210 /**********************************************************************
211 wrapper around ads and rpc methods of finds DC's
212 **********************************************************************/
214 bool get_dc_name(const char *domain
,
217 struct sockaddr_storage
*ss_out
)
219 struct sockaddr_storage dc_ss
;
221 bool our_domain
= False
;
223 zero_sockaddr(&dc_ss
);
227 if ( strequal(lp_workgroup(), domain
) || strequal(lp_realm(), realm
) )
230 /* always try to obey what the admin specified in smb.conf
231 (for the local domain) */
233 if ( (our_domain
&& lp_security()==SEC_ADS
) || realm
) {
234 ret
= ads_dc_name(domain
, realm
, &dc_ss
, srv_name
);
238 /* if we have only the realm we can't do anything else */
243 /* fall back on rpc methods if the ADS methods fail */
244 ret
= rpc_dc_name(domain
, srv_name
, &dc_ss
);