2 Unix SMB/CIFS implementation.
4 Winbind daemon connection manager
6 Copyright (C) Tim Potter 2001
7 Copyright (C) Andrew Bartlett 2002
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 find the DC for a domain using methods appropriate for a RPC domain
31 BOOL
rpc_find_dc(const char *domain
, fstring srv_name
, struct in_addr
*ip_out
)
33 struct in_addr
*ip_list
= NULL
, dc_ip
, exclude_ip
;
40 use_pdc_only
= must_use_pdc(domain
);
42 /* Lookup domain controller name */
44 if ( use_pdc_only
&& get_pdc_ip(domain
, &dc_ip
) ) {
45 DEBUG(10,("rpc_find_dc: Atempting to lookup PDC to avoid sam sync delays\n"));
47 if (name_status_find(domain
, 0x1c, 0x20, dc_ip
, srv_name
)) {
50 /* Didn't get name, remember not to talk to this DC. */
54 /* get a list of all domain controllers */
56 if (!get_dc_list( domain
, &ip_list
, &count
, &list_ordered
) ) {
57 DEBUG(3, ("Could not look up dc's for domain %s\n", domain
));
61 /* Remove the entry we've already failed with (should be the PDC). */
64 for (i
= 0; i
< count
; i
++) {
65 if (ip_equal( exclude_ip
, ip_list
[i
]))
70 /* Pick a nice close server, but only if the list was not ordered */
71 if (!list_ordered
&& (count
> 1) ) {
72 qsort(ip_list
, count
, sizeof(struct in_addr
), QSORT_CAST ip_compare
);
75 for (i
= 0; i
< count
; i
++) {
76 if (is_zero_ip(ip_list
[i
]))
79 if (name_status_find(domain
, 0x1c, 0x20, ip_list
[i
], srv_name
)) {
90 /* We have the netbios name and IP address of a domain controller.
91 Ideally we should sent a SAMLOGON request to determine whether
92 the DC is alive and kicking. If we can catch a dead DC before
93 performing a cli_connect() we can avoid a 30-second timeout. */
95 DEBUG(3, ("rpc_find_dc: Returning DC %s (%s) for domain %s\n", srv_name
,
96 inet_ntoa(dc_ip
), domain
));