--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+
+ Winbind daemon connection manager
+
+ Copyright (C) Tim Potter 2001
+ Copyright (C) Andrew Bartlett 2002
+ Copyright (C) Gerald Carter 2003
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+
+#include "includes.h"
+
+/**************************************************************************
+ Find the name and IP address for a server in he realm/domain
+ *************************************************************************/
+
+static BOOL ads_dc_name(const char *domain, const char *realm, struct in_addr *dc_ip, fstring srv_name)
+{
+ ADS_STRUCT *ads;
+
+ if (!realm && strequal(domain, lp_workgroup()))
+ realm = lp_realm();
+
+ ads = ads_init(realm, domain, NULL);
+ if (!ads)
+ return False;
+
+ DEBUG(4,("ads_dc_name: domain=%s\n", domain));
+
+#ifdef HAVE_ADS
+ /* we don't need to bind, just connect */
+ ads->auth.flags |= ADS_AUTH_NO_BIND;
+
+ ads_connect(ads);
+#endif
+
+ if (!ads->config.realm) {
+ ads_destroy(&ads);
+ return False;
+ }
+
+ fstrcpy(srv_name, ads->config.ldap_server_name);
+ strupper_m(srv_name);
+ *dc_ip = ads->ldap_ip;
+ ads_destroy(&ads);
+
+ DEBUG(4,("ads_dc_name: using server='%s' IP=%s\n",
+ srv_name, inet_ntoa(*dc_ip)));
+
+ return True;
+}
+
+/****************************************************************************
+ Utility function to return the name of a DC. The name is guaranteed to be
+ valid since we have already done a name_status_find on it
+ ***************************************************************************/
+
+static BOOL rpc_dc_name(const char *domain, fstring srv_name, struct in_addr *ip_out)
+{
+ struct ip_service *ip_list = NULL;
+ struct in_addr dc_ip, exclude_ip;
+ int count, i;
+ BOOL use_pdc_only;
+ NTSTATUS result;
+
+ zero_ip(&exclude_ip);
+
+ use_pdc_only = must_use_pdc(domain);
+
+ /* Lookup domain controller name */
+
+ if ( use_pdc_only && get_pdc_ip(domain, &dc_ip) )
+ {
+ DEBUG(10,("rpc_dc_name: Atempting to lookup PDC to avoid sam sync delays\n"));
+
+ /* check the connection cache and perform the node status
+ lookup only if the IP is not found to be bad */
+
+ if (name_status_find(domain, 0x1b, 0x20, dc_ip, srv_name) ) {
+ result = check_negative_conn_cache( domain, srv_name );
+ if ( NT_STATUS_IS_OK(result) )
+ goto done;
+ }
+ /* Didn't get name, remember not to talk to this DC. */
+ exclude_ip = dc_ip;
+ }
+
+ /* get a list of all domain controllers */
+
+ if ( !get_sorted_dc_list(domain, &ip_list, &count, False) ) {
+ DEBUG(3, ("Could not look up dc's for domain %s\n", domain));
+ return False;
+ }
+
+ /* Remove the entry we've already failed with (should be the PDC). */
+
+ if ( use_pdc_only ) {
+ for (i = 0; i < count; i++) {
+ if (ip_equal( exclude_ip, ip_list[i].ip))
+ zero_ip(&ip_list[i].ip);
+ }
+ }
+
+ for (i = 0; i < count; i++) {
+ if (is_zero_ip(ip_list[i].ip))
+ continue;
+
+ if (name_status_find(domain, 0x1c, 0x20, ip_list[i].ip, srv_name)) {
+ result = check_negative_conn_cache( domain, srv_name );
+ if ( NT_STATUS_IS_OK(result) ) {
+ dc_ip = ip_list[i].ip;
+ goto done;
+ }
+ }
+ }
+
+
+ SAFE_FREE(ip_list);
+
+ /* No-one to talk to )-: */
+ return False; /* Boo-hoo */
+
+ done:
+ /* We have the netbios name and IP address of a domain controller.
+ Ideally we should sent a SAMLOGON request to determine whether
+ the DC is alive and kicking. If we can catch a dead DC before
+ performing a cli_connect() we can avoid a 30-second timeout. */
+
+ DEBUG(3, ("rpc_dc_name: Returning DC %s (%s) for domain %s\n", srv_name,
+ inet_ntoa(dc_ip), domain));
+
+ *ip_out = dc_ip;
+
+ SAFE_FREE(ip_list);
+
+ return True;
+}
+
+/**********************************************************************
+ wrapper around ads and rpc methods of finds DC's
+**********************************************************************/
+
+BOOL get_dc_name(const char *domain, const char *realm, fstring srv_name, struct in_addr *ip_out)
+{
+ struct in_addr dc_ip;
+ BOOL ret;
+ BOOL our_domain = False;
+
+ zero_ip(&dc_ip);
+
+ ret = False;
+
+ if ( strequal(lp_workgroup(), domain) || strequal(lp_realm(), realm) )
+ our_domain = True;
+
+ /* always try to obey what the admin specified in smb.conf
+ (for the local domain) */
+
+ if ( (our_domain && lp_security()==SEC_ADS) || realm ) {
+ ret = ads_dc_name(domain, realm, &dc_ip, srv_name);
+ }
+
+ if (!ret) {
+ /* fall back on rpc methods if the ADS methods fail */
+ ret = rpc_dc_name(domain, srv_name, &dc_ip);
+ }
+
+ *ip_out = dc_ip;
+
+ return ret;
+}
+
projects / samba / blobdiff