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
,
60 TALLOC_CTX
*tmp_ctx
= talloc_stackframe();
65 char addr
[INET6_ADDRSTRLEN
];
67 if (!realm
&& strequal(domain
, lp_workgroup())) {
71 sitename
= sitename_fetch(tmp_ctx
, realm
);
73 /* Try this 3 times then give up. */
74 for( i
=0 ; i
< 3; i
++) {
75 ads
= ads_init(tmp_ctx
, realm
, domain
, NULL
, ADS_SASL_PLAIN
);
81 DEBUG(4,("ads_dc_name: domain=%s\n", domain
));
84 /* we don't need to bind, just connect */
85 ads_connect_cldap_only(ads
);
88 if (!ads
->config
.realm
) {
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 sitename
= sitename_fetch(tmp_ctx
, realm
);
100 /* Ensure we don't cache the DC we just connected to. */
101 namecache_delete(realm
, 0x1C);
102 namecache_delete(domain
, 0x1C);
107 if (is_our_primary_domain(domain
) && (ads
->config
.flags
& NBT_SERVER_KDC
)) {
108 if (ads_closest_dc(ads
)) {
109 /* We're going to use this KDC for this realm/domain.
110 If we are using sites, then force the krb5 libs
113 create_local_private_krb5_conf_for_domain(realm
,
118 create_local_private_krb5_conf_for_domain(realm
,
129 DEBUG(1,("ads_dc_name: sitename (now \"%s\") keeps changing ???\n",
130 sitename
? sitename
: ""));
135 fstrcpy(srv_name
, ads
->config
.ldap_server_name
);
136 if (!strupper_m(srv_name
)) {
141 *dc_ss
= ads
->ldap
.ss
;
143 zero_sockaddr(dc_ss
);
145 print_sockaddr(addr
, sizeof(addr
), dc_ss
);
146 DEBUG(4,("ads_dc_name: using server='%s' IP=%s\n",
151 TALLOC_FREE(tmp_ctx
);
156 /****************************************************************************
157 Utility function to return the name of a DC. The name is guaranteed to be
158 valid since we have already done a name_status_find on it
159 ***************************************************************************/
161 static bool rpc_dc_name(const char *domain
,
163 struct sockaddr_storage
*ss_out
)
165 struct samba_sockaddr
*sa_list
= NULL
;
167 struct sockaddr_storage dc_ss
;
170 char addr
[INET6_ADDRSTRLEN
];
172 /* get a list of all domain controllers */
174 result
= get_sorted_dc_list(talloc_tos(),
180 if (!NT_STATUS_IS_OK(result
)) {
181 DEBUG(3, ("Could not look up dc's for domain %s\n", domain
));
185 /* Remove the entry we've already failed with (should be the PDC). */
187 for (i
= 0; i
< count
; i
++) {
188 if (is_zero_addr(&sa_list
[i
].u
.ss
))
191 if (name_status_find(domain
, 0x1c, 0x20, &sa_list
[i
].u
.ss
, srv_name
)) {
192 result
= check_negative_conn_cache( domain
, srv_name
);
193 if ( NT_STATUS_IS_OK(result
) ) {
194 dc_ss
= sa_list
[i
].u
.ss
;
200 TALLOC_FREE(sa_list
);
202 /* No-one to talk to )-: */
203 return False
; /* Boo-hoo */
206 /* We have the netbios name and IP address of a domain controller.
207 Ideally we should sent a SAMLOGON request to determine whether
208 the DC is alive and kicking. If we can catch a dead DC before
209 performing a cli_connect() we can avoid a 30-second timeout. */
211 print_sockaddr(addr
, sizeof(addr
), &dc_ss
);
212 DEBUG(3, ("rpc_dc_name: Returning DC %s (%s) for domain %s\n", srv_name
,
216 TALLOC_FREE(sa_list
);
221 /**********************************************************************
222 wrapper around ads and rpc methods of finds DC's
223 **********************************************************************/
225 bool get_dc_name(const char *domain
,
228 struct sockaddr_storage
*ss_out
)
230 struct sockaddr_storage dc_ss
;
232 bool our_domain
= False
;
234 zero_sockaddr(&dc_ss
);
238 if ( strequal(lp_workgroup(), domain
) || strequal(lp_realm(), realm
) )
241 /* always try to obey what the admin specified in smb.conf
242 (for the local domain) */
244 if ( (our_domain
&& lp_security()==SEC_ADS
) || realm
) {
245 ret
= ads_dc_name(domain
, realm
, &dc_ss
, srv_name
);
249 /* if we have only the realm we can't do anything else */
254 /* fall back on rpc methods if the ADS methods fail */
255 ret
= rpc_dc_name(domain
, srv_name
, &dc_ss
);