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
,
112 ads
->config
.ldap_server_name
);
114 create_local_private_krb5_conf_for_domain(realm
,
118 ads
->config
.ldap_server_name
);
126 DEBUG(1,("ads_dc_name: sitename (now \"%s\") keeps changing ???\n",
127 sitename
? sitename
: ""));
134 fstrcpy(srv_name
, ads
->config
.ldap_server_name
);
135 strupper_m(srv_name
);
137 *dc_ss
= ads
->ldap
.ss
;
139 zero_sockaddr(dc_ss
);
143 print_sockaddr(addr
, sizeof(addr
), dc_ss
);
144 DEBUG(4,("ads_dc_name: using server='%s' IP=%s\n",
150 /****************************************************************************
151 Utility function to return the name of a DC. The name is guaranteed to be
152 valid since we have already done a name_status_find on it
153 ***************************************************************************/
155 static bool rpc_dc_name(const char *domain
,
157 struct sockaddr_storage
*ss_out
)
159 struct ip_service
*ip_list
= NULL
;
160 struct sockaddr_storage dc_ss
;
163 char addr
[INET6_ADDRSTRLEN
];
165 /* get a list of all domain controllers */
167 if (!NT_STATUS_IS_OK(get_sorted_dc_list(domain
, NULL
, &ip_list
, &count
,
169 DEBUG(3, ("Could not look up dc's for domain %s\n", domain
));
173 /* Remove the entry we've already failed with (should be the PDC). */
175 for (i
= 0; i
< count
; i
++) {
176 if (is_zero_addr((struct sockaddr
*)&ip_list
[i
].ss
))
179 if (name_status_find(domain
, 0x1c, 0x20, &ip_list
[i
].ss
, srv_name
)) {
180 result
= check_negative_conn_cache( domain
, srv_name
);
181 if ( NT_STATUS_IS_OK(result
) ) {
182 dc_ss
= ip_list
[i
].ss
;
190 /* No-one to talk to )-: */
191 return False
; /* Boo-hoo */
194 /* We have the netbios name and IP address of a domain controller.
195 Ideally we should sent a SAMLOGON request to determine whether
196 the DC is alive and kicking. If we can catch a dead DC before
197 performing a cli_connect() we can avoid a 30-second timeout. */
199 print_sockaddr(addr
, sizeof(addr
), &dc_ss
);
200 DEBUG(3, ("rpc_dc_name: Returning DC %s (%s) for domain %s\n", srv_name
,
209 /**********************************************************************
210 wrapper around ads and rpc methods of finds DC's
211 **********************************************************************/
213 bool get_dc_name(const char *domain
,
216 struct sockaddr_storage
*ss_out
)
218 struct sockaddr_storage dc_ss
;
220 bool our_domain
= False
;
222 zero_sockaddr(&dc_ss
);
226 if ( strequal(lp_workgroup(), domain
) || strequal(lp_realm(), realm
) )
229 /* always try to obey what the admin specified in smb.conf
230 (for the local domain) */
232 if ( (our_domain
&& lp_security()==SEC_ADS
) || realm
) {
233 ret
= ads_dc_name(domain
, realm
, &dc_ss
, srv_name
);
237 /* if we have only the realm we can't do anything else */
242 /* fall back on rpc methods if the ADS methods fail */
243 ret
= rpc_dc_name(domain
, srv_name
, &dc_ss
);