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 (Jerry) Carter 2003-2005.
9 Copyright (C) Volker Lendecke 2004-2005
10 Copyright (C) Jeremy Allison 2006
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 3 of the License, or
15 (at your option) any later version.
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with this program. If not, see <http://www.gnu.org/licenses/>.
27 We need to manage connections to domain controllers without having to
28 mess up the main winbindd code with other issues. The aim of the
29 connection manager is to:
31 - make connections to domain controllers and cache them
32 - re-establish connections when networks or servers go down
33 - centralise the policy on connection timeouts, domain controller
35 - manage re-entrancy for when winbindd becomes able to handle
36 multiple outstanding rpc requests
38 Why not have connection management as part of the rpc layer like tng?
39 Good question. This code may morph into libsmb/rpc_cache.c or something
40 like that but at the moment it's simply staying as part of winbind. I
41 think the TNG architecture of forcing every user of the rpc layer to use
42 the connection caching system is a bad idea. It should be an optional
43 method of using the routines.
45 The TNG design is quite good but I disagree with some aspects of the
53 - I'm pretty annoyed by all the make_nmb_name() stuff. It should be
54 moved down into another function.
56 - Take care when destroying cli_structs as they can be shared between
63 #include "../libcli/auth/libcli_auth.h"
64 #include "../librpc/gen_ndr/ndr_netlogon_c.h"
65 #include "rpc_client/cli_pipe.h"
66 #include "rpc_client/cli_netlogon.h"
67 #include "../librpc/gen_ndr/ndr_samr_c.h"
68 #include "../librpc/gen_ndr/ndr_lsa_c.h"
69 #include "rpc_client/cli_lsarpc.h"
70 #include "../librpc/gen_ndr/ndr_dssetup_c.h"
71 #include "libads/sitename_cache.h"
72 #include "libsmb/libsmb.h"
73 #include "libsmb/clidgram.h"
76 #include "../libcli/security/security.h"
79 #include "auth/gensec/gensec.h"
80 #include "../libcli/smb/smbXcli_base.h"
81 #include "libcli/auth/netlogon_creds_cli.h"
83 #include "rpc_server/rpc_ncacn_np.h"
84 #include "auth/credentials/credentials.h"
85 #include "lib/param/param.h"
88 #define DBGC_CLASS DBGC_WINBIND
92 struct sockaddr_storage ss;
95 extern struct winbindd_methods reconnect_methods;
96 extern bool override_logfile;
98 static NTSTATUS init_dc_connection_network(struct winbindd_domain *domain, bool need_rw_dc);
99 static void set_dc_type_and_flags( struct winbindd_domain *domain );
100 static bool set_dc_type_and_flags_trustinfo( struct winbindd_domain *domain );
101 static bool get_dcs(TALLOC_CTX *mem_ctx, struct winbindd_domain *domain,
102 struct dc_name_ip **dcs, int *num_dcs);
104 /****************************************************************
105 Child failed to find DC's. Reschedule check.
106 ****************************************************************/
108 static void msg_failed_to_go_online(struct messaging_context *msg,
111 struct server_id server_id,
114 struct winbindd_domain *domain;
115 const char *domainname = (const char *)data->data;
117 if (data->data == NULL || data->length == 0) {
121 DEBUG(5,("msg_fail_to_go_online: received for domain %s.\n", domainname));
123 for (domain = domain_list(); domain; domain = domain->next) {
124 if (domain->internal) {
128 if (strequal(domain->name, domainname)) {
129 if (domain->online) {
130 /* We're already online, ignore. */
131 DEBUG(5,("msg_fail_to_go_online: domain %s "
132 "already online.\n", domainname));
136 /* Reschedule the online check. */
137 set_domain_offline(domain);
143 /****************************************************************
144 Actually cause a reconnect from a message.
145 ****************************************************************/
147 static void msg_try_to_go_online(struct messaging_context *msg,
150 struct server_id server_id,
153 struct winbindd_domain *domain;
154 const char *domainname = (const char *)data->data;
156 if (data->data == NULL || data->length == 0) {
160 DEBUG(5,("msg_try_to_go_online: received for domain %s.\n", domainname));
162 for (domain = domain_list(); domain; domain = domain->next) {
163 if (domain->internal) {
167 if (strequal(domain->name, domainname)) {
169 if (domain->online) {
170 /* We're already online, ignore. */
171 DEBUG(5,("msg_try_to_go_online: domain %s "
172 "already online.\n", domainname));
176 /* This call takes care of setting the online
177 flag to true if we connected, or re-adding
178 the offline handler if false. Bypasses online
179 check so always does network calls. */
181 init_dc_connection_network(domain, true);
187 /****************************************************************
188 Fork a child to try and contact a DC. Do this as contacting a
189 DC requires blocking lookups and we don't want to block our
191 ****************************************************************/
193 static bool fork_child_dc_connect(struct winbindd_domain *domain)
195 struct dc_name_ip *dcs = NULL;
197 TALLOC_CTX *mem_ctx = NULL;
198 pid_t parent_pid = getpid();
202 if (domain->dc_probe_pid != (pid_t)-1) {
204 * We might already have a DC probe
205 * child working, check.
207 if (process_exists_by_pid(domain->dc_probe_pid)) {
208 DEBUG(10,("fork_child_dc_connect: pid %u already "
209 "checking for DC's.\n",
210 (unsigned int)domain->dc_probe_pid));
213 domain->dc_probe_pid = (pid_t)-1;
216 domain->dc_probe_pid = fork();
218 if (domain->dc_probe_pid == (pid_t)-1) {
219 DEBUG(0, ("fork_child_dc_connect: Could not fork: %s\n", strerror(errno)));
223 if (domain->dc_probe_pid != (pid_t)0) {
225 messaging_register(winbind_messaging_context(), NULL,
226 MSG_WINBIND_TRY_TO_GO_ONLINE,
227 msg_try_to_go_online);
228 messaging_register(winbind_messaging_context(), NULL,
229 MSG_WINBIND_FAILED_TO_GO_ONLINE,
230 msg_failed_to_go_online);
236 /* Leave messages blocked - we will never process one. */
238 if (!override_logfile) {
239 if (asprintf(&lfile, "%s/log.winbindd-dc-connect", get_dyn_LOGFILEBASE()) == -1) {
240 DEBUG(0, ("fork_child_dc_connect: out of memory.\n"));
245 status = winbindd_reinit_after_fork(NULL, lfile);
246 if (!NT_STATUS_IS_OK(status)) {
247 DEBUG(1, ("winbindd_reinit_after_fork failed: %s\n",
249 messaging_send_buf(winbind_messaging_context(),
250 pid_to_procid(parent_pid),
251 MSG_WINBIND_FAILED_TO_GO_ONLINE,
252 (const uint8_t *)domain->name,
253 strlen(domain->name)+1);
258 mem_ctx = talloc_init("fork_child_dc_connect");
260 DEBUG(0,("talloc_init failed.\n"));
261 messaging_send_buf(winbind_messaging_context(),
262 pid_to_procid(parent_pid),
263 MSG_WINBIND_FAILED_TO_GO_ONLINE,
264 (const uint8_t *)domain->name,
265 strlen(domain->name)+1);
269 if ((!get_dcs(mem_ctx, domain, &dcs, &num_dcs)) || (num_dcs == 0)) {
270 /* Still offline ? Can't find DC's. */
271 messaging_send_buf(winbind_messaging_context(),
272 pid_to_procid(parent_pid),
273 MSG_WINBIND_FAILED_TO_GO_ONLINE,
274 (const uint8_t *)domain->name,
275 strlen(domain->name)+1);
279 /* We got a DC. Send a message to our parent to get it to
280 try and do the same. */
282 messaging_send_buf(winbind_messaging_context(),
283 pid_to_procid(parent_pid),
284 MSG_WINBIND_TRY_TO_GO_ONLINE,
285 (const uint8_t *)domain->name,
286 strlen(domain->name)+1);
290 /****************************************************************
291 Handler triggered if we're offline to try and detect a DC.
292 ****************************************************************/
294 static void check_domain_online_handler(struct tevent_context *ctx,
295 struct tevent_timer *te,
299 struct winbindd_domain *domain =
300 (struct winbindd_domain *)private_data;
302 DEBUG(10,("check_domain_online_handler: called for domain "
303 "%s (online = %s)\n", domain->name,
304 domain->online ? "True" : "False" ));
306 TALLOC_FREE(domain->check_online_event);
308 /* Are we still in "startup" mode ? */
310 if (domain->startup && (time_mono(NULL) > domain->startup_time + 30)) {
311 /* No longer in "startup" mode. */
312 DEBUG(10,("check_domain_online_handler: domain %s no longer in 'startup' mode.\n",
314 domain->startup = False;
317 /* We've been told to stay offline, so stay
320 if (get_global_winbindd_state_offline()) {
321 DEBUG(10,("check_domain_online_handler: domain %s remaining globally offline\n",
326 /* Fork a child to test if it can contact a DC.
327 If it can then send ourselves a message to
328 cause a reconnect. */
330 fork_child_dc_connect(domain);
333 /****************************************************************
334 If we're still offline setup the timeout check.
335 ****************************************************************/
337 static void calc_new_online_timeout_check(struct winbindd_domain *domain)
339 int wbr = lp_winbind_reconnect_delay();
341 if (domain->startup) {
342 domain->check_online_timeout = 10;
343 } else if (domain->check_online_timeout < wbr) {
344 domain->check_online_timeout = wbr;
348 void winbind_msg_domain_offline(struct messaging_context *msg_ctx,
351 struct server_id server_id,
354 const char *domain_name = (const char *)data->data;
355 struct winbindd_domain *domain;
357 domain = find_domain_from_name_noinit(domain_name);
358 if (domain == NULL) {
362 domain->online = false;
364 DEBUG(10, ("Domain %s is marked as offline now.\n",
368 void winbind_msg_domain_online(struct messaging_context *msg_ctx,
371 struct server_id server_id,
374 const char *domain_name = (const char *)data->data;
375 struct winbindd_domain *domain;
377 domain = find_domain_from_name_noinit(domain_name);
378 if (domain == NULL) {
382 domain->online = true;
384 DEBUG(10, ("Domain %s is marked as online now.\n",
388 /****************************************************************
389 Set domain offline and also add handler to put us back online
391 ****************************************************************/
393 void set_domain_offline(struct winbindd_domain *domain)
395 pid_t parent_pid = getppid();
397 DEBUG(10,("set_domain_offline: called for domain %s\n",
400 TALLOC_FREE(domain->check_online_event);
402 if (domain->internal) {
403 DEBUG(3,("set_domain_offline: domain %s is internal - logic error.\n",
408 domain->online = False;
410 /* Offline domains are always initialized. They're
411 re-initialized when they go back online. */
413 domain->initialized = True;
415 /* We only add the timeout handler that checks and
416 allows us to go back online when we've not
417 been told to remain offline. */
419 if (get_global_winbindd_state_offline()) {
420 DEBUG(10,("set_domain_offline: domain %s remaining globally offline\n",
425 /* If we're in startup mode, check again in 10 seconds, not in
426 lp_winbind_reconnect_delay() seconds (which is 30 seconds by default). */
428 calc_new_online_timeout_check(domain);
430 domain->check_online_event = tevent_add_timer(winbind_event_context(),
432 timeval_current_ofs(domain->check_online_timeout,0),
433 check_domain_online_handler,
436 /* The above *has* to succeed for winbindd to work. */
437 if (!domain->check_online_event) {
438 smb_panic("set_domain_offline: failed to add online handler");
441 DEBUG(10,("set_domain_offline: added event handler for domain %s\n",
444 /* Send a message to the parent that the domain is offline. */
445 if (parent_pid > 1 && !domain->internal) {
446 messaging_send_buf(winbind_messaging_context(),
447 pid_to_procid(parent_pid),
448 MSG_WINBIND_DOMAIN_OFFLINE,
449 (uint8 *)domain->name,
450 strlen(domain->name) + 1);
453 /* Send an offline message to the idmap child when our
454 primary domain goes offline */
456 if ( domain->primary ) {
457 struct winbindd_child *idmap = idmap_child();
459 if ( idmap->pid != 0 ) {
460 messaging_send_buf(winbind_messaging_context(),
461 pid_to_procid(idmap->pid),
463 (const uint8_t *)domain->name,
464 strlen(domain->name)+1);
471 /****************************************************************
472 Set domain online - if allowed.
473 ****************************************************************/
475 static void set_domain_online(struct winbindd_domain *domain)
477 pid_t parent_pid = getppid();
479 DEBUG(10,("set_domain_online: called for domain %s\n",
482 if (domain->internal) {
483 DEBUG(3,("set_domain_online: domain %s is internal - logic error.\n",
488 if (get_global_winbindd_state_offline()) {
489 DEBUG(10,("set_domain_online: domain %s remaining globally offline\n",
494 winbindd_set_locator_kdc_envs(domain);
496 /* If we are waiting to get a krb5 ticket, trigger immediately. */
497 ccache_regain_all_now();
499 /* Ok, we're out of any startup mode now... */
500 domain->startup = False;
502 if (domain->online == False) {
503 /* We were offline - now we're online. We default to
504 using the MS-RPC backend if we started offline,
505 and if we're going online for the first time we
506 should really re-initialize the backends and the
507 checks to see if we're talking to an AD or NT domain.
510 domain->initialized = False;
512 /* 'reconnect_methods' is the MS-RPC backend. */
513 if (domain->backend == &reconnect_methods) {
514 domain->backend = NULL;
518 /* Ensure we have no online timeout checks. */
519 domain->check_online_timeout = 0;
520 TALLOC_FREE(domain->check_online_event);
522 /* Ensure we ignore any pending child messages. */
523 messaging_deregister(winbind_messaging_context(),
524 MSG_WINBIND_TRY_TO_GO_ONLINE, NULL);
525 messaging_deregister(winbind_messaging_context(),
526 MSG_WINBIND_FAILED_TO_GO_ONLINE, NULL);
528 domain->online = True;
530 /* Send a message to the parent that the domain is online. */
531 if (parent_pid > 1 && !domain->internal) {
532 messaging_send_buf(winbind_messaging_context(),
533 pid_to_procid(parent_pid),
534 MSG_WINBIND_DOMAIN_ONLINE,
535 (uint8 *)domain->name,
536 strlen(domain->name) + 1);
539 /* Send an online message to the idmap child when our
540 primary domain comes online */
542 if ( domain->primary ) {
543 struct winbindd_child *idmap = idmap_child();
545 if ( idmap->pid != 0 ) {
546 messaging_send_buf(winbind_messaging_context(),
547 pid_to_procid(idmap->pid),
549 (const uint8_t *)domain->name,
550 strlen(domain->name)+1);
557 /****************************************************************
558 Requested to set a domain online.
559 ****************************************************************/
561 void set_domain_online_request(struct winbindd_domain *domain)
565 DEBUG(10,("set_domain_online_request: called for domain %s\n",
568 if (get_global_winbindd_state_offline()) {
569 DEBUG(10,("set_domain_online_request: domain %s remaining globally offline\n",
574 if (domain->internal) {
575 DEBUG(10, ("set_domain_online_request: Internal domains are "
580 /* We've been told it's safe to go online and
581 try and connect to a DC. But I don't believe it
582 because network manager seems to lie.
583 Wait at least 5 seconds. Heuristics suck... */
588 /* Go into "startup" mode again. */
589 domain->startup_time = time_mono(NULL);
590 domain->startup = True;
594 if (!domain->check_online_event) {
595 /* If we've come from being globally offline we
596 don't have a check online event handler set.
597 We need to add one now we're trying to go
600 DEBUG(10,("set_domain_online_request: domain %s was globally offline.\n",
604 TALLOC_FREE(domain->check_online_event);
606 domain->check_online_event = tevent_add_timer(winbind_event_context(),
609 check_domain_online_handler,
612 /* The above *has* to succeed for winbindd to work. */
613 if (!domain->check_online_event) {
614 smb_panic("set_domain_online_request: failed to add online handler");
618 /****************************************************************
619 Add -ve connection cache entries for domain and realm.
620 ****************************************************************/
622 static void winbind_add_failed_connection_entry(
623 const struct winbindd_domain *domain,
627 add_failed_connection_entry(domain->name, server, result);
628 /* If this was the saf name for the last thing we talked to,
630 saf_delete(domain->name);
631 if (domain->alt_name != NULL) {
632 add_failed_connection_entry(domain->alt_name, server, result);
633 saf_delete(domain->alt_name);
635 winbindd_unset_locator_kdc_env(domain);
638 /* Choose between anonymous or authenticated connections. We need to use
639 an authenticated connection if DCs have the RestrictAnonymous registry
640 entry set > 0, or the "Additional restrictions for anonymous
641 connections" set in the win2k Local Security Policy.
643 Caller to free() result in domain, username, password
646 static void cm_get_ipc_userpass(char **username, char **domain, char **password)
648 *username = (char *)secrets_fetch(SECRETS_AUTH_USER, NULL);
649 *domain = (char *)secrets_fetch(SECRETS_AUTH_DOMAIN, NULL);
650 *password = (char *)secrets_fetch(SECRETS_AUTH_PASSWORD, NULL);
652 if (*username && **username) {
654 if (!*domain || !**domain)
655 *domain = smb_xstrdup(lp_workgroup());
657 if (!*password || !**password)
658 *password = smb_xstrdup("");
660 DEBUG(3, ("cm_get_ipc_userpass: Retrieved auth-user from secrets.tdb [%s\\%s]\n",
661 *domain, *username));
664 DEBUG(3, ("cm_get_ipc_userpass: No auth-user defined\n"));
665 *username = smb_xstrdup("");
666 *domain = smb_xstrdup("");
667 *password = smb_xstrdup("");
671 static NTSTATUS cm_get_ipc_credentials(TALLOC_CTX *mem_ctx,
672 struct cli_credentials **_creds)
675 TALLOC_CTX *frame = talloc_stackframe();
676 NTSTATUS status = NT_STATUS_INTERNAL_ERROR;
677 struct loadparm_context *lp_ctx;
678 char *username = NULL;
679 char *netbios_domain = NULL;
680 char *password = NULL;
681 struct cli_credentials *creds = NULL;
684 cm_get_ipc_userpass(&username, &netbios_domain, &password);
686 lp_ctx = loadparm_init_s3(frame, loadparm_s3_helpers());
687 if (lp_ctx == NULL) {
688 DEBUG(1, ("loadparm_init_s3 failed\n"));
689 status = NT_STATUS_INTERNAL_ERROR;
693 creds = cli_credentials_init(mem_ctx);
695 status = NT_STATUS_NO_MEMORY;
699 cli_credentials_set_conf(creds, lp_ctx);
700 cli_credentials_set_kerberos_state(creds, CRED_DONT_USE_KERBEROS);
702 ok = cli_credentials_set_domain(creds, netbios_domain, CRED_SPECIFIED);
704 status = NT_STATUS_NO_MEMORY;
708 ok = cli_credentials_set_username(creds, username, CRED_SPECIFIED);
710 status = NT_STATUS_NO_MEMORY;
714 ok = cli_credentials_set_password(creds, password, CRED_SPECIFIED);
716 status = NT_STATUS_NO_MEMORY;
722 status = NT_STATUS_OK;
726 SAFE_FREE(netbios_domain);
732 static bool cm_is_ipc_credentials(struct cli_credentials *creds)
734 TALLOC_CTX *frame = talloc_stackframe();
735 char *ipc_account = NULL;
736 char *ipc_domain = NULL;
737 char *ipc_password = NULL;
738 const char *creds_account = NULL;
739 const char *creds_domain = NULL;
740 const char *creds_password = NULL;
743 cm_get_ipc_userpass(&ipc_account, &ipc_domain, &ipc_password);
745 creds_account = cli_credentials_get_username(creds);
746 creds_domain = cli_credentials_get_domain(creds);
747 creds_password = cli_credentials_get_password(creds);
749 if (!strequal(ipc_domain, creds_domain)) {
753 if (!strequal(ipc_account, creds_account)) {
757 if (!strcsequal(ipc_password, creds_password)) {
763 SAFE_FREE(ipc_account);
764 SAFE_FREE(ipc_domain);
765 SAFE_FREE(ipc_password);
770 static bool get_dc_name_via_netlogon(struct winbindd_domain *domain,
772 struct sockaddr_storage *dc_ss)
774 struct winbindd_domain *our_domain = NULL;
775 struct rpc_pipe_client *netlogon_pipe = NULL;
779 unsigned int orig_timeout;
780 const char *tmp = NULL;
782 struct dcerpc_binding_handle *b;
784 /* Hmmmm. We can only open one connection to the NETLOGON pipe at the
791 if (domain->primary) {
795 our_domain = find_our_domain();
797 if ((mem_ctx = talloc_init("get_dc_name_via_netlogon")) == NULL) {
801 result = cm_connect_netlogon(our_domain, &netlogon_pipe);
802 if (!NT_STATUS_IS_OK(result)) {
803 talloc_destroy(mem_ctx);
807 b = netlogon_pipe->binding_handle;
809 /* This call can take a long time - allow the server to time out.
810 35 seconds should do it. */
812 orig_timeout = rpccli_set_timeout(netlogon_pipe, 35000);
814 if (our_domain->active_directory) {
815 struct netr_DsRGetDCNameInfo *domain_info = NULL;
817 result = dcerpc_netr_DsRGetDCName(b,
826 if (NT_STATUS_IS_OK(result) && W_ERROR_IS_OK(werr)) {
828 mem_ctx, domain_info->dc_unc);
830 DEBUG(0, ("talloc_strdup failed\n"));
831 talloc_destroy(mem_ctx);
834 if (domain->alt_name == NULL) {
835 domain->alt_name = talloc_strdup(domain,
836 domain_info->domain_name);
837 if (domain->alt_name == NULL) {
838 DEBUG(0, ("talloc_strdup failed\n"));
839 talloc_destroy(mem_ctx);
843 if (domain->forest_name == NULL) {
844 domain->forest_name = talloc_strdup(domain,
845 domain_info->forest_name);
846 if (domain->forest_name == NULL) {
847 DEBUG(0, ("talloc_strdup failed\n"));
848 talloc_destroy(mem_ctx);
854 result = dcerpc_netr_GetAnyDCName(b, mem_ctx,
861 /* And restore our original timeout. */
862 rpccli_set_timeout(netlogon_pipe, orig_timeout);
864 if (!NT_STATUS_IS_OK(result)) {
865 DEBUG(10,("dcerpc_netr_GetAnyDCName failed: %s\n",
867 talloc_destroy(mem_ctx);
871 if (!W_ERROR_IS_OK(werr)) {
872 DEBUG(10,("dcerpc_netr_GetAnyDCName failed: %s\n",
874 talloc_destroy(mem_ctx);
878 /* dcerpc_netr_GetAnyDCName gives us a name with \\ */
879 p = strip_hostname(tmp);
883 talloc_destroy(mem_ctx);
885 DEBUG(10,("dcerpc_netr_GetAnyDCName returned %s\n", dcname));
887 if (!resolve_name(dcname, dc_ss, 0x20, true)) {
895 * Helper function to assemble trust password and account name
897 static NTSTATUS get_trust_credentials(struct winbindd_domain *domain,
900 struct cli_credentials **_creds)
902 const struct winbindd_domain *creds_domain = NULL;
903 struct cli_credentials *creds;
905 bool force_machine_account = false;
907 /* If we are a DC and this is not our own domain */
909 if (!domain->active_directory) {
912 * For non active directory domains
913 * we can only use NTLMSSP for SMB.
915 * But the trust account is not allowed
916 * to use SMB with NTLMSSP.
918 force_machine_account = true;
922 if (IS_DC && !force_machine_account) {
923 creds_domain = domain;
925 creds_domain = find_our_domain();
926 if (creds_domain == NULL) {
927 return NT_STATUS_INVALID_SERVER_STATE;
931 status = pdb_get_trust_credentials(creds_domain->name,
932 creds_domain->alt_name,
935 if (!NT_STATUS_IS_OK(status)) {
939 if (domain->primary && lp_security() == SEC_ADS) {
940 cli_credentials_set_kerberos_state(creds,
941 CRED_AUTO_USE_KERBEROS);
942 } else if (domain->active_directory) {
943 cli_credentials_set_kerberos_state(creds,
944 CRED_MUST_USE_KERBEROS);
946 cli_credentials_set_kerberos_state(creds,
947 CRED_DONT_USE_KERBEROS);
950 if (creds_domain != domain) {
952 * We can only use schannel against a direct trust
954 cli_credentials_set_secure_channel_type(creds,
963 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
966 status = cm_get_ipc_credentials(mem_ctx, &creds);
967 if (!NT_STATUS_IS_OK(status)) {
975 /************************************************************************
976 Given a fd with a just-connected TCP connection to a DC, open a connection
978 ************************************************************************/
980 static NTSTATUS cm_prepare_connection(struct winbindd_domain *domain,
982 const char *controller,
983 struct cli_state **cli,
986 bool try_ipc_auth = false;
987 const char *machine_password = NULL;
988 const char *machine_krb5_principal = NULL;
989 const char *machine_account = NULL;
990 const char *machine_domain = NULL;
992 struct cli_credentials *creds = NULL;
993 enum credentials_use_kerberos krb5_state;
995 struct named_mutex *mutex;
997 NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
999 enum smb_signing_setting smb_sign_client_connections = lp_client_signing();
1001 if (smb_sign_client_connections == SMB_SIGNING_DEFAULT) {
1003 * If we are connecting to our own AD domain, require
1004 * smb signing to disrupt MITM attacks
1006 if (domain->primary && lp_security() == SEC_ADS) {
1007 smb_sign_client_connections = SMB_SIGNING_REQUIRED;
1009 * If we are in or are an AD domain and connecting to another
1010 * AD domain in our forest
1011 * then require smb signing to disrupt MITM attacks
1013 } else if ((lp_security() == SEC_ADS ||
1014 lp_server_role() == ROLE_ACTIVE_DIRECTORY_DC)
1015 && domain->active_directory
1016 && (domain->domain_trust_attribs
1017 & LSA_TRUST_ATTRIBUTE_WITHIN_FOREST)) {
1018 smb_sign_client_connections = SMB_SIGNING_REQUIRED;
1022 DEBUG(10,("cm_prepare_connection: connecting to DC %s for domain %s\n",
1023 controller, domain->name ));
1027 mutex = grab_named_mutex(talloc_tos(), controller,
1028 WINBIND_SERVER_MUTEX_WAIT_TIME);
1029 if (mutex == NULL) {
1031 DEBUG(0,("cm_prepare_connection: mutex grab failed for %s\n",
1033 result = NT_STATUS_POSSIBLE_DEADLOCK;
1037 flags |= CLI_FULL_CONNECTION_USE_KERBEROS;
1039 *cli = cli_state_create(NULL, sockfd,
1040 controller, domain->alt_name,
1041 smb_sign_client_connections, flags);
1044 DEBUG(1, ("Could not cli_initialize\n"));
1045 result = NT_STATUS_NO_MEMORY;
1049 cli_set_timeout(*cli, 10000); /* 10 seconds */
1051 result = smbXcli_negprot((*cli)->conn, (*cli)->timeout,
1052 lp_client_min_protocol(),
1053 lp_winbindd_max_protocol());
1055 if (!NT_STATUS_IS_OK(result)) {
1056 DEBUG(1, ("cli_negprot failed: %s\n", nt_errstr(result)));
1060 if (smbXcli_conn_protocol((*cli)->conn) >= PROTOCOL_NT1 &&
1061 smb1cli_conn_capabilities((*cli)->conn) & CAP_EXTENDED_SECURITY) {
1062 try_ipc_auth = true;
1063 } else if (smbXcli_conn_protocol((*cli)->conn) >= PROTOCOL_SMB2_02) {
1064 try_ipc_auth = true;
1065 } else if (smb_sign_client_connections == SMB_SIGNING_REQUIRED) {
1067 * If we are forcing on SMB signing, then we must
1068 * require authentication unless this is a one-way
1069 * trust, and we have no stored user/password
1071 try_ipc_auth = true;
1075 result = get_trust_credentials(domain, talloc_tos(), false, &creds);
1076 if (!NT_STATUS_IS_OK(result)) {
1077 DEBUG(1, ("get_trust_credentials(%s) failed: %s\n",
1078 domain->name, nt_errstr(result)));
1083 * Without SPNEGO or NTLMSSP (perhaps via SMB2) we
1084 * would try and authentication with our machine
1085 * account password and fail. This is very rare in
1086 * the modern world however
1088 creds = cli_credentials_init_anon(talloc_tos());
1089 if (creds == NULL) {
1090 result = NT_STATUS_NO_MEMORY;
1091 DEBUG(1, ("cli_credentials_init_anon(%s) failed: %s\n",
1092 domain->name, nt_errstr(result)));
1097 krb5_state = cli_credentials_get_kerberos_state(creds);
1099 machine_krb5_principal = cli_credentials_get_principal(creds,
1101 if (machine_krb5_principal == NULL) {
1102 krb5_state = CRED_DONT_USE_KERBEROS;
1105 machine_account = cli_credentials_get_username(creds);
1106 machine_password = cli_credentials_get_password(creds);
1107 machine_domain = cli_credentials_get_domain(creds);
1109 if (krb5_state != CRED_DONT_USE_KERBEROS) {
1111 /* Try a krb5 session */
1113 (*cli)->use_kerberos = True;
1114 DEBUG(5, ("connecting to %s from %s with kerberos principal "
1115 "[%s] and realm [%s]\n", controller, lp_netbios_name(),
1116 machine_krb5_principal, domain->alt_name));
1118 winbindd_set_locator_kdc_envs(domain);
1120 result = cli_session_setup(*cli,
1121 machine_krb5_principal,
1123 strlen(machine_password)+1,
1125 strlen(machine_password)+1,
1128 if (NT_STATUS_IS_OK(result)) {
1129 goto session_setup_done;
1132 DEBUG(4,("failed kerberos session setup with %s\n",
1133 nt_errstr(result)));
1136 if (krb5_state != CRED_MUST_USE_KERBEROS) {
1137 /* Fall back to non-kerberos session setup using NTLMSSP SPNEGO with the machine account. */
1138 (*cli)->use_kerberos = False;
1140 DEBUG(5, ("connecting to %s from %s using NTLMSSP with username "
1141 "[%s]\\[%s]\n", controller, lp_netbios_name(),
1142 machine_domain, machine_account));
1144 result = cli_session_setup(*cli,
1147 strlen(machine_password)+1,
1149 strlen(machine_password)+1,
1153 if (NT_STATUS_IS_OK(result)) {
1154 goto session_setup_done;
1158 * If we are not going to validiate the conneciton
1159 * with SMB signing, then allow us to fall back to
1162 if (NT_STATUS_EQUAL(result, NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT)
1163 || NT_STATUS_EQUAL(result, NT_STATUS_TRUSTED_DOMAIN_FAILURE)
1164 || NT_STATUS_EQUAL(result, NT_STATUS_INVALID_ACCOUNT_NAME)
1165 || NT_STATUS_EQUAL(result, NT_STATUS_LOGON_FAILURE))
1167 if (cli_credentials_is_anonymous(creds)) {
1171 if (!cm_is_ipc_credentials(creds)) {
1175 if (smb_sign_client_connections == SMB_SIGNING_REQUIRED) {
1182 DEBUG(4, ("authenticated session setup failed with %s\n",
1183 nt_errstr(result)));
1188 result = cm_get_ipc_credentials(talloc_tos(), &creds);
1189 if (!NT_STATUS_IS_OK(result)) {
1193 if (cli_credentials_is_anonymous(creds)) {
1198 machine_account = cli_credentials_get_username(creds);
1199 machine_password = cli_credentials_get_password(creds);
1200 machine_domain = cli_credentials_get_domain(creds);
1202 /* Fall back to non-kerberos session setup using NTLMSSP SPNEGO with the ipc creds. */
1203 (*cli)->use_kerberos = False;
1205 DEBUG(5, ("connecting to %s from %s using NTLMSSP with username "
1206 "[%s]\\[%s]\n", controller, lp_netbios_name(),
1207 machine_domain, machine_account));
1209 result = cli_session_setup(*cli,
1212 strlen(machine_password)+1,
1214 strlen(machine_password)+1,
1217 if (NT_STATUS_IS_OK(result)) {
1218 goto session_setup_done;
1222 * If we are not going to validiate the conneciton
1223 * with SMB signing, then allow us to fall back to
1226 if (NT_STATUS_EQUAL(result, NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT)
1227 || NT_STATUS_EQUAL(result, NT_STATUS_TRUSTED_DOMAIN_FAILURE)
1228 || NT_STATUS_EQUAL(result, NT_STATUS_LOGON_FAILURE))
1233 DEBUG(4, ("authenticated session setup failed with %s\n",
1234 nt_errstr(result)));
1240 if (smb_sign_client_connections == SMB_SIGNING_REQUIRED) {
1244 /* Fall back to anonymous connection, this might fail later */
1245 DEBUG(10,("cm_prepare_connection: falling back to anonymous "
1246 "connection for DC %s\n",
1249 (*cli)->use_kerberos = False;
1251 result = cli_session_setup(*cli, "", "", 0, "", 0, "");
1252 if (NT_STATUS_IS_OK(result)) {
1253 DEBUG(5, ("Connected anonymously\n"));
1254 goto session_setup_done;
1257 /* We can't session setup */
1263 * This should be a short term hack until
1264 * dynamic re-authentication is implemented.
1266 * See Bug 9175 - winbindd doesn't recover from
1267 * NT_STATUS_NETWORK_SESSION_EXPIRED
1269 if (smbXcli_conn_protocol((*cli)->conn) >= PROTOCOL_SMB2_02) {
1270 smbXcli_session_set_disconnect_expired((*cli)->smb2.session);
1273 result = cli_tree_connect(*cli, "IPC$", "IPC", "", 0);
1275 if (!NT_STATUS_IS_OK(result)) {
1276 DEBUG(1,("failed tcon_X with %s\n", nt_errstr(result)));
1280 /* cache the server name for later connections */
1282 saf_store(domain->name, controller);
1283 if (domain->alt_name && (*cli)->use_kerberos) {
1284 saf_store(domain->alt_name, controller);
1287 winbindd_set_locator_kdc_envs(domain);
1292 result = NT_STATUS_OK;
1297 if (!NT_STATUS_IS_OK(result)) {
1298 winbind_add_failed_connection_entry(domain, controller, result);
1299 if ((*cli) != NULL) {
1308 /*******************************************************************
1309 Add a dcname and sockaddr_storage pair to the end of a dc_name_ip
1312 Keeps the list unique by not adding duplicate entries.
1314 @param[in] mem_ctx talloc memory context to allocate from
1315 @param[in] domain_name domain of the DC
1316 @param[in] dcname name of the DC to add to the list
1317 @param[in] pss Internet address and port pair to add to the list
1318 @param[in,out] dcs array of dc_name_ip structures to add to
1319 @param[in,out] num_dcs number of dcs returned in the dcs array
1320 @return true if the list was added to, false otherwise
1321 *******************************************************************/
1323 static bool add_one_dc_unique(TALLOC_CTX *mem_ctx, const char *domain_name,
1324 const char *dcname, struct sockaddr_storage *pss,
1325 struct dc_name_ip **dcs, int *num)
1329 if (!NT_STATUS_IS_OK(check_negative_conn_cache(domain_name, dcname))) {
1330 DEBUG(10, ("DC %s was in the negative conn cache\n", dcname));
1334 /* Make sure there's no duplicates in the list */
1335 for (i=0; i<*num; i++)
1337 (struct sockaddr *)(void *)&(*dcs)[i].ss,
1338 (struct sockaddr *)(void *)pss))
1341 *dcs = talloc_realloc(mem_ctx, *dcs, struct dc_name_ip, (*num)+1);
1346 fstrcpy((*dcs)[*num].name, dcname);
1347 (*dcs)[*num].ss = *pss;
1352 static bool add_sockaddr_to_array(TALLOC_CTX *mem_ctx,
1353 struct sockaddr_storage *pss, uint16 port,
1354 struct sockaddr_storage **addrs, int *num)
1356 *addrs = talloc_realloc(mem_ctx, *addrs, struct sockaddr_storage, (*num)+1);
1358 if (*addrs == NULL) {
1363 (*addrs)[*num] = *pss;
1364 set_sockaddr_port((struct sockaddr *)&(*addrs)[*num], port);
1370 /*******************************************************************
1371 convert an ip to a name
1372 *******************************************************************/
1374 static bool dcip_to_name(TALLOC_CTX *mem_ctx,
1375 const struct winbindd_domain *domain,
1376 struct sockaddr_storage *pss,
1379 struct ip_service ip_list;
1380 uint32_t nt_version = NETLOGON_NT_VERSION_1;
1382 const char *dc_name;
1385 bool is_ad_domain = false;
1391 /* For active directory servers, try to get the ldap server name.
1392 None of these failures should be considered critical for now */
1394 if ((lp_security() == SEC_ADS) && (domain->alt_name != NULL)) {
1395 is_ad_domain = true;
1396 } else if (lp_server_role() == ROLE_ACTIVE_DIRECTORY_DC) {
1397 is_ad_domain = domain->active_directory;
1402 ADS_STATUS ads_status;
1403 char addr[INET6_ADDRSTRLEN];
1405 print_sockaddr(addr, sizeof(addr), pss);
1407 ads = ads_init(domain->alt_name, domain->name, addr);
1408 ads->auth.flags |= ADS_AUTH_NO_BIND;
1410 ads_status = ads_connect(ads);
1411 if (ADS_ERR_OK(ads_status)) {
1412 /* We got a cldap packet. */
1413 *name = talloc_strdup(mem_ctx,
1414 ads->config.ldap_server_name);
1415 if (*name == NULL) {
1418 namecache_store(*name, 0x20, 1, &ip_list);
1420 DEBUG(10,("dcip_to_name: flags = 0x%x\n", (unsigned int)ads->config.flags));
1422 if (domain->primary && (ads->config.flags & NBT_SERVER_KDC)) {
1423 if (ads_closest_dc(ads)) {
1424 char *sitename = sitename_fetch(mem_ctx, ads->config.realm);
1426 /* We're going to use this KDC for this realm/domain.
1427 If we are using sites, then force the krb5 libs
1430 create_local_private_krb5_conf_for_domain(domain->alt_name,
1435 TALLOC_FREE(sitename);
1437 /* use an off site KDC */
1438 create_local_private_krb5_conf_for_domain(domain->alt_name,
1443 winbindd_set_locator_kdc_envs(domain);
1445 /* Ensure we contact this DC also. */
1446 saf_store(domain->name, *name);
1447 saf_store(domain->alt_name, *name);
1450 ads_destroy( &ads );
1454 ads_destroy( &ads );
1459 status = nbt_getdc(winbind_messaging_context(), 10, pss, domain->name,
1460 &domain->sid, nt_version, mem_ctx, &nt_version,
1462 if (NT_STATUS_IS_OK(status)) {
1463 *name = talloc_strdup(mem_ctx, dc_name);
1464 if (*name == NULL) {
1467 namecache_store(*name, 0x20, 1, &ip_list);
1471 /* try node status request */
1473 if (name_status_find(domain->name, 0x1c, 0x20, pss, nbtname) ) {
1474 namecache_store(nbtname, 0x20, 1, &ip_list);
1477 *name = talloc_strdup(mem_ctx, nbtname);
1478 if (*name == NULL) {
1488 /*******************************************************************
1489 Retrieve a list of IP addresses for domain controllers.
1491 The array is sorted in the preferred connection order.
1493 @param[in] mem_ctx talloc memory context to allocate from
1494 @param[in] domain domain to retrieve DCs for
1495 @param[out] dcs array of dcs that will be returned
1496 @param[out] num_dcs number of dcs returned in the dcs array
1498 *******************************************************************/
1500 static bool get_dcs(TALLOC_CTX *mem_ctx, struct winbindd_domain *domain,
1501 struct dc_name_ip **dcs, int *num_dcs)
1504 struct sockaddr_storage ss;
1505 struct ip_service *ip_list = NULL;
1506 int iplist_size = 0;
1509 enum security_types sec = (enum security_types)lp_security();
1511 is_our_domain = strequal(domain->name, lp_workgroup());
1513 /* If not our domain, get the preferred DC, by asking our primary DC */
1515 && get_dc_name_via_netlogon(domain, dcname, &ss)
1516 && add_one_dc_unique(mem_ctx, domain->name, dcname, &ss, dcs,
1519 char addr[INET6_ADDRSTRLEN];
1520 print_sockaddr(addr, sizeof(addr), &ss);
1521 DEBUG(10, ("Retrieved DC %s at %s via netlogon\n",
1526 if ((sec == SEC_ADS) && (domain->alt_name != NULL)) {
1527 char *sitename = NULL;
1529 /* We need to make sure we know the local site before
1530 doing any DNS queries, as this will restrict the
1531 get_sorted_dc_list() call below to only fetching
1532 DNS records for the correct site. */
1534 /* Find any DC to get the site record.
1535 We deliberately don't care about the
1538 get_dc_name(domain->name, domain->alt_name, dcname, &ss);
1540 sitename = sitename_fetch(mem_ctx, domain->alt_name);
1543 /* Do the site-specific AD dns lookup first. */
1544 get_sorted_dc_list(domain->alt_name, sitename, &ip_list,
1545 &iplist_size, True);
1547 /* Add ips to the DC array. We don't look up the name
1548 of the DC in this function, but we fill in the char*
1549 of the ip now to make the failed connection cache
1551 for ( i=0; i<iplist_size; i++ ) {
1552 char addr[INET6_ADDRSTRLEN];
1553 print_sockaddr(addr, sizeof(addr),
1555 add_one_dc_unique(mem_ctx,
1564 TALLOC_FREE(sitename);
1568 /* Now we add DCs from the main AD DNS lookup. */
1569 get_sorted_dc_list(domain->alt_name, NULL, &ip_list,
1570 &iplist_size, True);
1572 for ( i=0; i<iplist_size; i++ ) {
1573 char addr[INET6_ADDRSTRLEN];
1574 print_sockaddr(addr, sizeof(addr),
1576 add_one_dc_unique(mem_ctx,
1588 /* Try standard netbios queries if no ADS and fall back to DNS queries
1589 * if alt_name is available */
1590 if (*num_dcs == 0) {
1591 get_sorted_dc_list(domain->name, NULL, &ip_list, &iplist_size,
1593 if (iplist_size == 0) {
1594 if (domain->alt_name != NULL) {
1595 get_sorted_dc_list(domain->alt_name, NULL, &ip_list,
1596 &iplist_size, true);
1600 for ( i=0; i<iplist_size; i++ ) {
1601 char addr[INET6_ADDRSTRLEN];
1602 print_sockaddr(addr, sizeof(addr),
1604 add_one_dc_unique(mem_ctx,
1619 /*******************************************************************
1620 Find and make a connection to a DC in the given domain.
1622 @param[in] mem_ctx talloc memory context to allocate from
1623 @param[in] domain domain to find a dc in
1624 @param[out] dcname NetBIOS or FQDN of DC that's connected to
1625 @param[out] pss DC Internet address and port
1626 @param[out] fd fd of the open socket connected to the newly found dc
1627 @return true when a DC connection is made, false otherwise
1628 *******************************************************************/
1630 static bool find_new_dc(TALLOC_CTX *mem_ctx,
1631 struct winbindd_domain *domain,
1632 char **dcname, struct sockaddr_storage *pss, int *fd)
1634 struct dc_name_ip *dcs = NULL;
1637 const char **dcnames = NULL;
1638 size_t num_dcnames = 0;
1640 struct sockaddr_storage *addrs = NULL;
1651 if (!get_dcs(mem_ctx, domain, &dcs, &num_dcs) || (num_dcs == 0))
1654 for (i=0; i<num_dcs; i++) {
1656 if (!add_string_to_array(mem_ctx, dcs[i].name,
1657 &dcnames, &num_dcnames)) {
1660 if (!add_sockaddr_to_array(mem_ctx, &dcs[i].ss, TCP_SMB_PORT,
1661 &addrs, &num_addrs)) {
1666 if ((num_dcnames == 0) || (num_dcnames != num_addrs))
1669 if ((addrs == NULL) || (dcnames == NULL))
1672 status = smbsock_any_connect(addrs, dcnames, NULL, NULL, NULL,
1673 num_addrs, 0, 10, fd, &fd_index, NULL);
1674 if (!NT_STATUS_IS_OK(status)) {
1675 for (i=0; i<num_dcs; i++) {
1676 char ab[INET6_ADDRSTRLEN];
1677 print_sockaddr(ab, sizeof(ab), &dcs[i].ss);
1678 DEBUG(10, ("find_new_dc: smbsock_any_connect failed for "
1679 "domain %s address %s. Error was %s\n",
1680 domain->name, ab, nt_errstr(status) ));
1681 winbind_add_failed_connection_entry(domain,
1682 dcs[i].name, NT_STATUS_UNSUCCESSFUL);
1687 *pss = addrs[fd_index];
1689 if (*dcnames[fd_index] != '\0' && !is_ipaddress(dcnames[fd_index])) {
1690 /* Ok, we've got a name for the DC */
1691 *dcname = talloc_strdup(mem_ctx, dcnames[fd_index]);
1692 if (*dcname == NULL) {
1698 /* Try to figure out the name */
1699 if (dcip_to_name(mem_ctx, domain, pss, dcname)) {
1703 /* We can not continue without the DC's name */
1704 winbind_add_failed_connection_entry(domain, dcs[fd_index].name,
1705 NT_STATUS_UNSUCCESSFUL);
1707 /* Throw away all arrays as we're doing this again. */
1711 TALLOC_FREE(dcnames);
1723 static char *current_dc_key(TALLOC_CTX *mem_ctx, const char *domain_name)
1725 return talloc_asprintf_strupper_m(mem_ctx, "CURRENT_DCNAME/%s",
1729 static void store_current_dc_in_gencache(const char *domain_name,
1730 const char *dc_name,
1731 struct cli_state *cli)
1733 char addr[INET6_ADDRSTRLEN];
1737 if (!cli_state_is_connected(cli)) {
1741 print_sockaddr(addr, sizeof(addr),
1742 smbXcli_conn_remote_sockaddr(cli->conn));
1744 key = current_dc_key(talloc_tos(), domain_name);
1749 value = talloc_asprintf(talloc_tos(), "%s %s", addr, dc_name);
1750 if (value == NULL) {
1754 gencache_set(key, value, 0x7fffffff);
1760 bool fetch_current_dc_from_gencache(TALLOC_CTX *mem_ctx,
1761 const char *domain_name,
1762 char **p_dc_name, char **p_dc_ip)
1767 char *dc_name = NULL;
1770 key = current_dc_key(talloc_tos(), domain_name);
1774 if (!gencache_get(key, mem_ctx, &value, NULL)) {
1777 p = strchr(value, ' ');
1781 dc_ip = talloc_strndup(mem_ctx, value, p - value);
1782 if (dc_ip == NULL) {
1785 dc_name = talloc_strdup(mem_ctx, p+1);
1786 if (dc_name == NULL) {
1790 if (p_dc_ip != NULL) {
1794 if (p_dc_name != NULL) {
1795 *p_dc_name = dc_name;
1800 TALLOC_FREE(dc_name);
1807 NTSTATUS wb_open_internal_pipe(TALLOC_CTX *mem_ctx,
1808 const struct ndr_interface_table *table,
1809 struct rpc_pipe_client **ret_pipe)
1811 struct rpc_pipe_client *cli = NULL;
1812 const struct auth_session_info *session_info;
1813 NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
1816 session_info = get_session_info_system();
1817 SMB_ASSERT(session_info != NULL);
1819 /* create a connection to the specified pipe */
1820 if (lp_parm_bool(-1, "winbindd", "use external pipes", false)) {
1821 status = rpc_pipe_open_interface(mem_ctx,
1825 winbind_messaging_context(),
1828 status = rpc_pipe_open_internal(mem_ctx,
1832 winbind_messaging_context(),
1835 if (!NT_STATUS_IS_OK(status)) {
1836 DEBUG(0, ("open_internal_pipe: Could not connect to %s pipe: %s\n",
1837 table->name, nt_errstr(status)));
1845 return NT_STATUS_OK;
1848 static NTSTATUS cm_open_connection(struct winbindd_domain *domain,
1849 struct winbindd_cm_conn *new_conn)
1851 TALLOC_CTX *mem_ctx;
1853 char *saf_servername;
1856 if ((mem_ctx = talloc_init("cm_open_connection")) == NULL) {
1857 set_domain_offline(domain);
1858 return NT_STATUS_NO_MEMORY;
1861 saf_servername = saf_fetch(mem_ctx, domain->name );
1863 /* we have to check the server affinity cache here since
1864 later we select a DC based on response time and not preference */
1866 /* Check the negative connection cache
1867 before talking to it. It going down may have
1868 triggered the reconnection. */
1870 if ( saf_servername && NT_STATUS_IS_OK(check_negative_conn_cache( domain->name, saf_servername))) {
1872 DEBUG(10,("cm_open_connection: saf_servername is '%s' for domain %s\n",
1873 saf_servername, domain->name ));
1875 /* convert an ip address to a name */
1876 if (is_ipaddress( saf_servername ) ) {
1877 char *dcname = NULL;
1878 struct sockaddr_storage ss;
1880 if (!interpret_string_addr(&ss, saf_servername,
1882 TALLOC_FREE(mem_ctx);
1883 return NT_STATUS_UNSUCCESSFUL;
1885 if (dcip_to_name(mem_ctx, domain, &ss, &dcname)) {
1886 domain->dcname = talloc_strdup(domain,
1888 if (domain->dcname == NULL) {
1889 TALLOC_FREE(mem_ctx);
1890 return NT_STATUS_NO_MEMORY;
1893 winbind_add_failed_connection_entry(
1894 domain, saf_servername,
1895 NT_STATUS_UNSUCCESSFUL);
1898 domain->dcname = talloc_strdup(domain, saf_servername);
1899 if (domain->dcname == NULL) {
1900 TALLOC_FREE(mem_ctx);
1901 return NT_STATUS_NO_MEMORY;
1906 for (retries = 0; retries < 3; retries++) {
1909 char *dcname = NULL;
1911 result = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1913 DEBUG(10,("cm_open_connection: dcname is '%s' for domain %s\n",
1914 domain->dcname ? domain->dcname : "", domain->name ));
1916 if (domain->dcname != NULL
1917 && NT_STATUS_IS_OK(check_negative_conn_cache( domain->name, domain->dcname))
1918 && (resolve_name(domain->dcname, &domain->dcaddr, 0x20, true)))
1922 status = smbsock_connect(&domain->dcaddr, 0,
1925 if (!NT_STATUS_IS_OK(status)) {
1931 !find_new_dc(mem_ctx, domain, &dcname, &domain->dcaddr, &fd))
1933 /* This is the one place where we will
1934 set the global winbindd offline state
1935 to true, if a "WINBINDD_OFFLINE" entry
1936 is found in the winbindd cache. */
1937 set_global_winbindd_state_offline();
1940 if (dcname != NULL) {
1941 talloc_free(domain->dcname);
1943 domain->dcname = talloc_move(domain, &dcname);
1944 if (domain->dcname == NULL) {
1945 result = NT_STATUS_NO_MEMORY;
1950 new_conn->cli = NULL;
1952 result = cm_prepare_connection(domain, fd, domain->dcname,
1953 &new_conn->cli, &retry);
1954 if (!NT_STATUS_IS_OK(result)) {
1955 /* Don't leak the smb connection socket */
1963 if (NT_STATUS_IS_OK(result)) {
1964 bool seal_pipes = true;
1966 winbindd_set_locator_kdc_envs(domain);
1968 if (domain->online == False) {
1969 /* We're changing state from offline to online. */
1970 set_global_winbindd_state_online();
1972 set_domain_online(domain);
1975 * Much as I hate global state, this seems to be the point
1976 * where we can be certain that we have a proper connection to
1977 * a DC. wbinfo --dc-info needs that information, store it in
1978 * gencache with a looong timeout. This will need revisiting
1979 * once we start to connect to multiple DCs, wbcDcInfo is
1980 * already prepared for that.
1982 store_current_dc_in_gencache(domain->name, domain->dcname,
1985 seal_pipes = lp_winbind_sealed_pipes();
1986 seal_pipes = lp_parm_bool(-1, "winbind sealed pipes",
1991 new_conn->auth_level = DCERPC_AUTH_LEVEL_PRIVACY;
1993 new_conn->auth_level = DCERPC_AUTH_LEVEL_INTEGRITY;
1996 /* Ensure we setup the retry handler. */
1997 set_domain_offline(domain);
2000 talloc_destroy(mem_ctx);
2004 /* Close down all open pipes on a connection. */
2006 void invalidate_cm_connection(struct winbindd_domain *domain)
2009 struct winbindd_cm_conn *conn = &domain->conn;
2011 /* We're closing down a possibly dead
2012 connection. Don't have impossibly long (10s) timeouts. */
2015 cli_set_timeout(conn->cli, 1000); /* 1 second. */
2018 if (conn->samr_pipe != NULL) {
2019 if (is_valid_policy_hnd(&conn->sam_connect_handle)) {
2020 dcerpc_samr_Close(conn->samr_pipe->binding_handle,
2022 &conn->sam_connect_handle,
2025 TALLOC_FREE(conn->samr_pipe);
2026 /* Ok, it must be dead. Drop timeout to 0.5 sec. */
2028 cli_set_timeout(conn->cli, 500);
2032 if (conn->lsa_pipe != NULL) {
2033 if (is_valid_policy_hnd(&conn->lsa_policy)) {
2034 dcerpc_lsa_Close(conn->lsa_pipe->binding_handle,
2039 TALLOC_FREE(conn->lsa_pipe);
2040 /* Ok, it must be dead. Drop timeout to 0.5 sec. */
2042 cli_set_timeout(conn->cli, 500);
2046 if (conn->lsa_pipe_tcp != NULL) {
2047 if (is_valid_policy_hnd(&conn->lsa_policy)) {
2048 dcerpc_lsa_Close(conn->lsa_pipe_tcp->binding_handle,
2053 TALLOC_FREE(conn->lsa_pipe_tcp);
2054 /* Ok, it must be dead. Drop timeout to 0.5 sec. */
2056 cli_set_timeout(conn->cli, 500);
2060 if (conn->netlogon_pipe != NULL) {
2061 TALLOC_FREE(conn->netlogon_pipe);
2062 /* Ok, it must be dead. Drop timeout to 0.5 sec. */
2064 cli_set_timeout(conn->cli, 500);
2068 conn->auth_level = DCERPC_AUTH_LEVEL_PRIVACY;
2069 conn->netlogon_force_reauth = false;
2070 conn->netlogon_flags = 0;
2071 TALLOC_FREE(conn->netlogon_creds);
2074 cli_shutdown(conn->cli);
2080 void close_conns_after_fork(void)
2082 struct winbindd_domain *domain;
2083 struct winbindd_cli_state *cli_state;
2085 for (domain = domain_list(); domain; domain = domain->next) {
2087 * first close the low level SMB TCP connection
2088 * so that we don't generate any SMBclose
2089 * requests in invalidate_cm_connection()
2091 if (cli_state_is_connected(domain->conn.cli)) {
2092 smbXcli_conn_disconnect(domain->conn.cli->conn, NT_STATUS_OK);
2095 invalidate_cm_connection(domain);
2098 for (cli_state = winbindd_client_list();
2100 cli_state = cli_state->next) {
2101 if (cli_state->sock >= 0) {
2102 close(cli_state->sock);
2103 cli_state->sock = -1;
2108 static bool connection_ok(struct winbindd_domain *domain)
2112 ok = cli_state_is_connected(domain->conn.cli);
2114 DEBUG(3, ("connection_ok: Connection to %s for domain %s is not connected\n",
2115 domain->dcname, domain->name));
2119 if (domain->online == False) {
2120 DEBUG(3, ("connection_ok: Domain %s is offline\n", domain->name));
2127 /* Initialize a new connection up to the RPC BIND.
2128 Bypass online status check so always does network calls. */
2130 static NTSTATUS init_dc_connection_network(struct winbindd_domain *domain, bool need_rw_dc)
2133 bool skip_connection = domain->internal;
2134 if (need_rw_dc && domain->rodc) {
2135 skip_connection = false;
2138 /* Internal connections never use the network. */
2139 if (dom_sid_equal(&domain->sid, &global_sid_Builtin)) {
2140 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
2143 /* Still ask the internal LSA and SAMR server about the local domain */
2144 if (skip_connection || connection_ok(domain)) {
2145 if (!domain->initialized) {
2146 set_dc_type_and_flags(domain);
2148 return NT_STATUS_OK;
2151 invalidate_cm_connection(domain);
2153 if (!domain->primary && !domain->initialized) {
2155 * Before we connect to a trust, work out if it is an
2156 * AD domain by asking our own domain.
2158 set_dc_type_and_flags_trustinfo(domain);
2161 result = cm_open_connection(domain, &domain->conn);
2163 if (NT_STATUS_IS_OK(result) && !domain->initialized) {
2164 set_dc_type_and_flags(domain);
2170 NTSTATUS init_dc_connection(struct winbindd_domain *domain, bool need_rw_dc)
2172 if (dom_sid_equal(&domain->sid, &global_sid_Builtin)) {
2173 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
2176 if (domain->initialized && !domain->online) {
2177 /* We check for online status elsewhere. */
2178 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
2181 return init_dc_connection_network(domain, need_rw_dc);
2184 static NTSTATUS init_dc_connection_rpc(struct winbindd_domain *domain, bool need_rw_dc)
2188 status = init_dc_connection(domain, need_rw_dc);
2189 if (!NT_STATUS_IS_OK(status)) {
2193 if (!domain->internal && domain->conn.cli == NULL) {
2194 /* happens for trusted domains without inbound trust */
2195 return NT_STATUS_TRUSTED_DOMAIN_FAILURE;
2198 return NT_STATUS_OK;
2201 /******************************************************************************
2202 Set the trust flags (direction and forest location) for a domain
2203 ******************************************************************************/
2205 static bool set_dc_type_and_flags_trustinfo( struct winbindd_domain *domain )
2207 struct winbindd_domain *our_domain;
2208 NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
2210 struct netr_DomainTrustList trusts;
2212 uint32 flags = (NETR_TRUST_FLAG_IN_FOREST |
2213 NETR_TRUST_FLAG_OUTBOUND |
2214 NETR_TRUST_FLAG_INBOUND);
2215 struct rpc_pipe_client *cli;
2216 TALLOC_CTX *mem_ctx = NULL;
2217 struct dcerpc_binding_handle *b;
2219 DEBUG(5, ("set_dc_type_and_flags_trustinfo: domain %s\n", domain->name ));
2221 /* Our primary domain doesn't need to worry about trust flags.
2222 Force it to go through the network setup */
2223 if ( domain->primary ) {
2227 mem_ctx = talloc_stackframe();
2228 our_domain = find_our_domain();
2229 if (our_domain->internal) {
2230 result = init_dc_connection(our_domain, false);
2231 if (!NT_STATUS_IS_OK(result)) {
2232 DEBUG(3,("set_dc_type_and_flags_trustinfo: "
2233 "Not able to make a connection to our domain: %s\n",
2234 nt_errstr(result)));
2235 TALLOC_FREE(mem_ctx);
2240 /* This won't work unless our domain is AD */
2241 if ( !our_domain->active_directory ) {
2242 TALLOC_FREE(mem_ctx);
2246 if (our_domain->internal) {
2247 result = wb_open_internal_pipe(mem_ctx, &ndr_table_netlogon, &cli);
2248 } else if (!connection_ok(our_domain)) {
2249 DEBUG(3,("set_dc_type_and_flags_trustinfo: "
2250 "No connection to our domain!\n"));
2251 TALLOC_FREE(mem_ctx);
2254 result = cm_connect_netlogon(our_domain, &cli);
2257 if (!NT_STATUS_IS_OK(result)) {
2258 DEBUG(5, ("set_dc_type_and_flags_trustinfo: Could not open "
2259 "a connection to %s for PIPE_NETLOGON (%s)\n",
2260 domain->name, nt_errstr(result)));
2261 TALLOC_FREE(mem_ctx);
2264 b = cli->binding_handle;
2266 /* Use DsEnumerateDomainTrusts to get us the trust direction and type. */
2267 result = dcerpc_netr_DsrEnumerateDomainTrusts(b, mem_ctx,
2272 if (!NT_STATUS_IS_OK(result)) {
2273 DEBUG(0,("set_dc_type_and_flags_trustinfo: "
2274 "failed to query trusted domain list: %s\n",
2275 nt_errstr(result)));
2276 TALLOC_FREE(mem_ctx);
2279 if (!W_ERROR_IS_OK(werr)) {
2280 DEBUG(0,("set_dc_type_and_flags_trustinfo: "
2281 "failed to query trusted domain list: %s\n",
2283 TALLOC_FREE(mem_ctx);
2287 /* Now find the domain name and get the flags */
2289 for ( i=0; i<trusts.count; i++ ) {
2290 if ( strequal( domain->name, trusts.array[i].netbios_name) ) {
2291 domain->domain_flags = trusts.array[i].trust_flags;
2292 domain->domain_type = trusts.array[i].trust_type;
2293 domain->domain_trust_attribs = trusts.array[i].trust_attributes;
2295 if ( domain->domain_type == LSA_TRUST_TYPE_UPLEVEL )
2296 domain->active_directory = True;
2298 /* This flag is only set if the domain is *our*
2299 primary domain and the primary domain is in
2302 domain->native_mode = (domain->domain_flags & NETR_TRUST_FLAG_NATIVE);
2304 DEBUG(5, ("set_dc_type_and_flags_trustinfo: domain %s is %sin "
2305 "native mode.\n", domain->name,
2306 domain->native_mode ? "" : "NOT "));
2308 DEBUG(5,("set_dc_type_and_flags_trustinfo: domain %s is %s"
2309 "running active directory.\n", domain->name,
2310 domain->active_directory ? "" : "NOT "));
2312 domain->can_do_ncacn_ip_tcp = domain->active_directory;
2314 domain->initialized = True;
2320 TALLOC_FREE(mem_ctx);
2322 return domain->initialized;
2325 /******************************************************************************
2326 We can 'sense' certain things about the DC by it's replies to certain
2329 This tells us if this particular remote server is Active Directory, and if it
2331 ******************************************************************************/
2333 static void set_dc_type_and_flags_connect( struct winbindd_domain *domain )
2335 NTSTATUS status, result;
2337 TALLOC_CTX *mem_ctx = NULL;
2338 struct rpc_pipe_client *cli = NULL;
2339 struct policy_handle pol;
2340 union dssetup_DsRoleInfo info;
2341 union lsa_PolicyInformation *lsa_info = NULL;
2343 if (!domain->internal && !connection_ok(domain)) {
2347 mem_ctx = talloc_init("set_dc_type_and_flags on domain %s\n",
2350 DEBUG(1, ("set_dc_type_and_flags_connect: talloc_init() failed\n"));
2354 DEBUG(5, ("set_dc_type_and_flags_connect: domain %s\n", domain->name ));
2356 if (domain->internal) {
2357 status = wb_open_internal_pipe(mem_ctx,
2361 status = cli_rpc_pipe_open_noauth(domain->conn.cli,
2366 if (!NT_STATUS_IS_OK(status)) {
2367 DEBUG(5, ("set_dc_type_and_flags_connect: Could not bind to "
2368 "PI_DSSETUP on domain %s: (%s)\n",
2369 domain->name, nt_errstr(status)));
2371 /* if this is just a non-AD domain we need to continue
2372 * identifying so that we can in the end return with
2373 * domain->initialized = True - gd */
2378 status = dcerpc_dssetup_DsRoleGetPrimaryDomainInformation(cli->binding_handle, mem_ctx,
2379 DS_ROLE_BASIC_INFORMATION,
2384 if (NT_STATUS_IS_OK(status)) {
2385 result = werror_to_ntstatus(werr);
2387 if (!NT_STATUS_IS_OK(status)) {
2388 DEBUG(5, ("set_dc_type_and_flags_connect: rpccli_ds_getprimarydominfo "
2389 "on domain %s failed: (%s)\n",
2390 domain->name, nt_errstr(status)));
2392 /* older samba3 DCs will return DCERPC_FAULT_OP_RNG_ERROR for
2393 * every opcode on the DSSETUP pipe, continue with
2394 * no_dssetup mode here as well to get domain->initialized
2397 if (NT_STATUS_EQUAL(status, NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE)) {
2401 TALLOC_FREE(mem_ctx);
2405 if ((info.basic.flags & DS_ROLE_PRIMARY_DS_RUNNING) &&
2406 !(info.basic.flags & DS_ROLE_PRIMARY_DS_MIXED_MODE)) {
2407 domain->native_mode = True;
2409 domain->native_mode = False;
2413 if (domain->internal) {
2414 status = wb_open_internal_pipe(mem_ctx,
2418 status = cli_rpc_pipe_open_noauth(domain->conn.cli,
2419 &ndr_table_lsarpc, &cli);
2421 if (!NT_STATUS_IS_OK(status)) {
2422 DEBUG(5, ("set_dc_type_and_flags_connect: Could not bind to "
2423 "PI_LSARPC on domain %s: (%s)\n",
2424 domain->name, nt_errstr(status)));
2426 TALLOC_FREE(mem_ctx);
2430 status = rpccli_lsa_open_policy2(cli, mem_ctx, True,
2431 SEC_FLAG_MAXIMUM_ALLOWED, &pol);
2433 if (NT_STATUS_IS_OK(status)) {
2434 /* This particular query is exactly what Win2k clients use
2435 to determine that the DC is active directory */
2436 status = dcerpc_lsa_QueryInfoPolicy2(cli->binding_handle, mem_ctx,
2438 LSA_POLICY_INFO_DNS,
2443 if (NT_STATUS_IS_OK(status) && NT_STATUS_IS_OK(result)) {
2444 domain->active_directory = True;
2446 if (lsa_info->dns.name.string) {
2447 if (!strequal(domain->name, lsa_info->dns.name.string))
2449 DEBUG(1, ("set_dc_type_and_flags_connect: DC "
2450 "for domain %s claimed it was a DC "
2451 "for domain %s, refusing to "
2454 lsa_info->dns.name.string));
2456 TALLOC_FREE(mem_ctx);
2459 talloc_free(domain->name);
2460 domain->name = talloc_strdup(domain,
2461 lsa_info->dns.name.string);
2462 if (domain->name == NULL) {
2467 if (lsa_info->dns.dns_domain.string) {
2468 if (domain->alt_name != NULL &&
2469 !strequal(domain->alt_name,
2470 lsa_info->dns.dns_domain.string))
2472 DEBUG(1, ("set_dc_type_and_flags_connect: DC "
2473 "for domain %s (%s) claimed it was "
2474 "a DC for domain %s, refusing to "
2476 domain->alt_name, domain->name,
2477 lsa_info->dns.dns_domain.string));
2479 TALLOC_FREE(mem_ctx);
2482 talloc_free(domain->alt_name);
2484 talloc_strdup(domain,
2485 lsa_info->dns.dns_domain.string);
2486 if (domain->alt_name == NULL) {
2491 /* See if we can set some domain trust flags about
2494 if (lsa_info->dns.dns_forest.string) {
2495 talloc_free(domain->forest_name);
2496 domain->forest_name =
2497 talloc_strdup(domain,
2498 lsa_info->dns.dns_forest.string);
2499 if (domain->forest_name == NULL) {
2503 if (strequal(domain->forest_name, domain->alt_name)) {
2504 domain->domain_flags |= NETR_TRUST_FLAG_TREEROOT;
2508 if (lsa_info->dns.sid) {
2509 if (!is_null_sid(&domain->sid) &&
2510 !dom_sid_equal(&domain->sid,
2513 DEBUG(1, ("set_dc_type_and_flags_connect: DC "
2514 "for domain %s (%s) claimed it was "
2515 "a DC for domain %s, refusing to "
2517 dom_sid_string(talloc_tos(),
2520 dom_sid_string(talloc_tos(),
2521 lsa_info->dns.sid)));
2523 TALLOC_FREE(mem_ctx);
2526 sid_copy(&domain->sid, lsa_info->dns.sid);
2529 domain->active_directory = False;
2531 status = rpccli_lsa_open_policy(cli, mem_ctx, True,
2532 SEC_FLAG_MAXIMUM_ALLOWED,
2535 if (!NT_STATUS_IS_OK(status)) {
2539 status = dcerpc_lsa_QueryInfoPolicy(cli->binding_handle, mem_ctx,
2541 LSA_POLICY_INFO_ACCOUNT_DOMAIN,
2544 if (NT_STATUS_IS_OK(status) && NT_STATUS_IS_OK(result)) {
2546 if (lsa_info->account_domain.name.string) {
2547 if (!strequal(domain->name,
2548 lsa_info->account_domain.name.string))
2551 ("set_dc_type_and_flags_connect: "
2552 "DC for domain %s claimed it was"
2553 " a DC for domain %s, refusing "
2554 "to initialize\n", domain->name,
2556 account_domain.name.string));
2558 TALLOC_FREE(mem_ctx);
2561 talloc_free(domain->name);
2563 talloc_strdup(domain,
2564 lsa_info->account_domain.name.string);
2567 if (lsa_info->account_domain.sid) {
2568 if (!is_null_sid(&domain->sid) &&
2569 !dom_sid_equal(&domain->sid,
2570 lsa_info->account_domain.sid))
2573 ("set_dc_type_and_flags_connect: "
2574 "DC for domain %s (%s) claimed "
2575 "it was a DC for domain %s, "
2576 "refusing to initialize\n",
2577 dom_sid_string(talloc_tos(),
2580 dom_sid_string(talloc_tos(),
2581 lsa_info->account_domain.sid)));
2583 TALLOC_FREE(mem_ctx);
2586 sid_copy(&domain->sid, lsa_info->account_domain.sid);
2592 DEBUG(5, ("set_dc_type_and_flags_connect: domain %s is %sin native mode.\n",
2593 domain->name, domain->native_mode ? "" : "NOT "));
2595 DEBUG(5,("set_dc_type_and_flags_connect: domain %s is %srunning active directory.\n",
2596 domain->name, domain->active_directory ? "" : "NOT "));
2598 domain->can_do_ncacn_ip_tcp = domain->active_directory;
2602 TALLOC_FREE(mem_ctx);
2604 domain->initialized = True;
2607 /**********************************************************************
2608 Set the domain_flags (trust attributes, domain operating modes, etc...
2609 ***********************************************************************/
2611 static void set_dc_type_and_flags( struct winbindd_domain *domain )
2613 /* we always have to contact our primary domain */
2615 if ( domain->primary || domain->internal) {
2616 DEBUG(10,("set_dc_type_and_flags: setting up flags for "
2617 "primary or internal domain\n"));
2618 set_dc_type_and_flags_connect( domain );
2622 /* Use our DC to get the information if possible */
2624 if ( !set_dc_type_and_flags_trustinfo( domain ) ) {
2625 /* Otherwise, fallback to contacting the
2627 set_dc_type_and_flags_connect( domain );
2635 /**********************************************************************
2636 ***********************************************************************/
2638 static NTSTATUS cm_get_schannel_creds(struct winbindd_domain *domain,
2639 struct netlogon_creds_cli_context **ppdc)
2641 NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
2642 struct rpc_pipe_client *netlogon_pipe;
2646 if ((!IS_DC) && (!domain->primary)) {
2647 return NT_STATUS_TRUSTED_DOMAIN_FAILURE;
2650 if (domain->conn.netlogon_creds != NULL) {
2651 if (!(domain->conn.netlogon_flags & NETLOGON_NEG_AUTHENTICATED_RPC)) {
2652 return NT_STATUS_TRUSTED_DOMAIN_FAILURE;
2654 *ppdc = domain->conn.netlogon_creds;
2655 return NT_STATUS_OK;
2658 result = cm_connect_netlogon(domain, &netlogon_pipe);
2659 if (!NT_STATUS_IS_OK(result)) {
2663 if (domain->conn.netlogon_creds == NULL) {
2664 return NT_STATUS_TRUSTED_DOMAIN_FAILURE;
2667 if (!(domain->conn.netlogon_flags & NETLOGON_NEG_AUTHENTICATED_RPC)) {
2668 return NT_STATUS_TRUSTED_DOMAIN_FAILURE;
2671 *ppdc = domain->conn.netlogon_creds;
2672 return NT_STATUS_OK;
2675 NTSTATUS cm_connect_sam(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
2677 struct rpc_pipe_client **cli, struct policy_handle *sam_handle)
2679 struct winbindd_cm_conn *conn;
2680 NTSTATUS status, result;
2681 struct netlogon_creds_cli_context *p_creds;
2682 struct cli_credentials *creds = NULL;
2684 if (sid_check_is_our_sam(&domain->sid)) {
2685 if (domain->rodc == false || need_rw_dc == false) {
2686 return open_internal_samr_conn(mem_ctx, domain, cli, sam_handle);
2690 status = init_dc_connection_rpc(domain, need_rw_dc);
2691 if (!NT_STATUS_IS_OK(status)) {
2695 conn = &domain->conn;
2697 if (rpccli_is_connected(conn->samr_pipe)) {
2701 TALLOC_FREE(conn->samr_pipe);
2704 * No SAMR pipe yet. Attempt to get an NTLMSSP SPNEGO authenticated
2705 * sign and sealed pipe using the machine account password by
2706 * preference. If we can't - try schannel, if that fails, try
2710 result = get_trust_credentials(domain, talloc_tos(), false, &creds);
2711 if (!NT_STATUS_IS_OK(result)) {
2712 DEBUG(10, ("cm_connect_sam: No user available for "
2713 "domain %s, trying schannel\n", domain->name));
2717 if (cli_credentials_is_anonymous(creds)) {
2722 * We have an authenticated connection. Use a SPNEGO
2723 * authenticated SAMR pipe with sign & seal.
2725 status = cli_rpc_pipe_open_with_creds(conn->cli,
2728 DCERPC_AUTH_TYPE_SPNEGO,
2730 smbXcli_conn_remote_name(conn->cli->conn),
2733 if (!NT_STATUS_IS_OK(status)) {
2734 DEBUG(10,("cm_connect_sam: failed to connect to SAMR "
2735 "pipe for domain %s using NTLMSSP "
2736 "authenticated pipe: user %s. Error was "
2737 "%s\n", domain->name,
2738 cli_credentials_get_unparsed_name(creds, talloc_tos()),
2739 nt_errstr(status)));
2743 DEBUG(10,("cm_connect_sam: connected to SAMR pipe for "
2744 "domain %s using NTLMSSP authenticated "
2745 "pipe: user %s\n", domain->name,
2746 cli_credentials_get_unparsed_name(creds, talloc_tos())));
2748 status = dcerpc_samr_Connect2(conn->samr_pipe->binding_handle, mem_ctx,
2749 conn->samr_pipe->desthost,
2750 SEC_FLAG_MAXIMUM_ALLOWED,
2751 &conn->sam_connect_handle,
2753 if (NT_STATUS_IS_OK(status) && NT_STATUS_IS_OK(result)) {
2756 if (NT_STATUS_IS_OK(status)) {
2760 DEBUG(10,("cm_connect_sam: ntlmssp-sealed dcerpc_samr_Connect2 "
2761 "failed for domain %s, error was %s. Trying schannel\n",
2762 domain->name, nt_errstr(status) ));
2763 TALLOC_FREE(conn->samr_pipe);
2767 /* Fall back to schannel if it's a W2K pre-SP1 box. */
2769 status = cm_get_schannel_creds(domain, &p_creds);
2770 if (!NT_STATUS_IS_OK(status)) {
2771 /* If this call fails - conn->cli can now be NULL ! */
2772 DEBUG(10, ("cm_connect_sam: Could not get schannel auth info "
2773 "for domain %s (error %s), trying anon\n",
2775 nt_errstr(status) ));
2779 result = get_trust_credentials(domain, talloc_tos(), true, &creds);
2780 if (!NT_STATUS_IS_OK(result)) {
2781 DEBUG(10, ("cm_connect_sam: No user available for "
2782 "domain %s (error %s), trying anon\n", domain->name,
2783 nt_errstr(result)));
2786 status = cli_rpc_pipe_open_schannel_with_creds
2787 (conn->cli, &ndr_table_samr, NCACN_NP,
2788 creds, p_creds, &conn->samr_pipe);
2790 if (!NT_STATUS_IS_OK(status)) {
2791 DEBUG(10,("cm_connect_sam: failed to connect to SAMR pipe for "
2792 "domain %s using schannel. Error was %s\n",
2793 domain->name, nt_errstr(status) ));
2796 DEBUG(10,("cm_connect_sam: connected to SAMR pipe for domain %s using "
2797 "schannel.\n", domain->name ));
2799 status = dcerpc_samr_Connect2(conn->samr_pipe->binding_handle, mem_ctx,
2800 conn->samr_pipe->desthost,
2801 SEC_FLAG_MAXIMUM_ALLOWED,
2802 &conn->sam_connect_handle,
2804 if (NT_STATUS_IS_OK(status) && NT_STATUS_IS_OK(result)) {
2807 if (NT_STATUS_IS_OK(status)) {
2810 DEBUG(10,("cm_connect_sam: schannel-sealed dcerpc_samr_Connect2 failed "
2811 "for domain %s, error was %s. Trying anonymous\n",
2812 domain->name, nt_errstr(status) ));
2813 TALLOC_FREE(conn->samr_pipe);
2817 /* Finally fall back to anonymous. */
2818 if (lp_winbind_sealed_pipes() || lp_require_strong_key()) {
2819 status = NT_STATUS_DOWNGRADE_DETECTED;
2820 DEBUG(1, ("Unwilling to make SAMR connection to domain %s"
2821 "without connection level security, "
2822 "must set 'winbind sealed pipes = false' and "
2823 "'require strong key = false' to proceed: %s\n",
2824 domain->name, nt_errstr(status)));
2827 status = cli_rpc_pipe_open_noauth(conn->cli, &ndr_table_samr,
2830 if (!NT_STATUS_IS_OK(status)) {
2834 status = dcerpc_samr_Connect2(conn->samr_pipe->binding_handle, mem_ctx,
2835 conn->samr_pipe->desthost,
2836 SEC_FLAG_MAXIMUM_ALLOWED,
2837 &conn->sam_connect_handle,
2839 if (!NT_STATUS_IS_OK(status)) {
2840 DEBUG(10,("cm_connect_sam: rpccli_samr_Connect2 failed "
2841 "for domain %s Error was %s\n",
2842 domain->name, nt_errstr(status) ));
2845 if (!NT_STATUS_IS_OK(result)) {
2847 DEBUG(10,("cm_connect_sam: dcerpc_samr_Connect2 failed "
2848 "for domain %s Error was %s\n",
2849 domain->name, nt_errstr(result)));
2854 status = dcerpc_samr_OpenDomain(conn->samr_pipe->binding_handle,
2856 &conn->sam_connect_handle,
2857 SEC_FLAG_MAXIMUM_ALLOWED,
2859 &conn->sam_domain_handle,
2861 if (!NT_STATUS_IS_OK(status)) {
2868 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
2870 * if we got access denied, we might just have no access rights
2871 * to talk to the remote samr server server (e.g. when we are a
2872 * PDC and we are connecting a w2k8 pdc via an interdomain
2873 * trust). In that case do not invalidate the whole connection
2876 TALLOC_FREE(conn->samr_pipe);
2877 ZERO_STRUCT(conn->sam_domain_handle);
2879 } else if (!NT_STATUS_IS_OK(status)) {
2880 invalidate_cm_connection(domain);
2884 *cli = conn->samr_pipe;
2885 *sam_handle = conn->sam_domain_handle;
2889 /**********************************************************************
2890 open an schanneld ncacn_ip_tcp connection to LSA
2891 ***********************************************************************/
2893 static NTSTATUS cm_connect_lsa_tcp(struct winbindd_domain *domain,
2894 TALLOC_CTX *mem_ctx,
2895 struct rpc_pipe_client **cli)
2897 struct winbindd_cm_conn *conn;
2898 struct netlogon_creds_cli_context *p_creds = NULL;
2899 struct cli_credentials *creds = NULL;
2902 DEBUG(10,("cm_connect_lsa_tcp\n"));
2904 status = init_dc_connection_rpc(domain, false);
2905 if (!NT_STATUS_IS_OK(status)) {
2909 conn = &domain->conn;
2911 if (conn->lsa_pipe_tcp &&
2912 conn->lsa_pipe_tcp->transport->transport == NCACN_IP_TCP &&
2913 conn->lsa_pipe_tcp->auth->auth_level >= DCERPC_AUTH_LEVEL_INTEGRITY &&
2914 rpccli_is_connected(conn->lsa_pipe_tcp)) {
2918 TALLOC_FREE(conn->lsa_pipe_tcp);
2920 status = cm_get_schannel_creds(domain, &p_creds);
2921 if (!NT_STATUS_IS_OK(status)) {
2925 status = get_trust_credentials(domain, talloc_tos(), true, &creds);
2926 if (!NT_STATUS_IS_OK(status)) {
2930 status = cli_rpc_pipe_open_schannel_with_creds(conn->cli,
2935 &conn->lsa_pipe_tcp);
2936 if (!NT_STATUS_IS_OK(status)) {
2937 DEBUG(10,("cli_rpc_pipe_open_schannel_with_key failed: %s\n",
2938 nt_errstr(status)));
2943 if (!NT_STATUS_IS_OK(status)) {
2944 TALLOC_FREE(conn->lsa_pipe_tcp);
2948 *cli = conn->lsa_pipe_tcp;
2953 NTSTATUS cm_connect_lsa(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
2954 struct rpc_pipe_client **cli, struct policy_handle *lsa_policy)
2956 struct winbindd_cm_conn *conn;
2957 NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
2958 struct netlogon_creds_cli_context *p_creds;
2959 struct cli_credentials *creds = NULL;
2961 result = init_dc_connection_rpc(domain, false);
2962 if (!NT_STATUS_IS_OK(result))
2965 conn = &domain->conn;
2967 if (rpccli_is_connected(conn->lsa_pipe)) {
2971 TALLOC_FREE(conn->lsa_pipe);
2973 result = get_trust_credentials(domain, talloc_tos(), false, &creds);
2974 if (!NT_STATUS_IS_OK(result)) {
2975 DEBUG(10, ("cm_connect_lsa: No user available for "
2976 "domain %s, trying schannel\n", domain->name));
2980 if (cli_credentials_is_anonymous(creds)) {
2985 * We have an authenticated connection. Use a SPNEGO
2986 * authenticated LSA pipe with sign & seal.
2988 result = cli_rpc_pipe_open_with_creds
2989 (conn->cli, &ndr_table_lsarpc, NCACN_NP,
2990 DCERPC_AUTH_TYPE_SPNEGO,
2992 smbXcli_conn_remote_name(conn->cli->conn),
2995 if (!NT_STATUS_IS_OK(result)) {
2996 DEBUG(10,("cm_connect_lsa: failed to connect to LSA pipe for "
2997 "domain %s using NTLMSSP authenticated pipe: user "
2998 "%s. Error was %s. Trying schannel.\n",
3000 cli_credentials_get_unparsed_name(creds, talloc_tos()),
3001 nt_errstr(result)));
3005 DEBUG(10,("cm_connect_lsa: connected to LSA pipe for domain %s using "
3006 "NTLMSSP authenticated pipe: user %s\n",
3007 domain->name, cli_credentials_get_unparsed_name(creds, talloc_tos())));
3009 result = rpccli_lsa_open_policy(conn->lsa_pipe, mem_ctx, True,
3010 SEC_FLAG_MAXIMUM_ALLOWED,
3012 if (NT_STATUS_IS_OK(result)) {
3016 DEBUG(10,("cm_connect_lsa: rpccli_lsa_open_policy failed, trying "
3019 TALLOC_FREE(conn->lsa_pipe);
3023 /* Fall back to schannel if it's a W2K pre-SP1 box. */
3025 result = cm_get_schannel_creds(domain, &p_creds);
3026 if (!NT_STATUS_IS_OK(result)) {
3027 /* If this call fails - conn->cli can now be NULL ! */
3028 DEBUG(10, ("cm_connect_lsa: Could not get schannel auth info "
3029 "for domain %s (error %s), trying anon\n",
3031 nt_errstr(result) ));
3036 result = get_trust_credentials(domain, talloc_tos(), true, &creds);
3037 if (!NT_STATUS_IS_OK(result)) {
3038 DEBUG(10, ("cm_connect_lsa: No user available for "
3039 "domain %s (error %s), trying anon\n", domain->name,
3040 nt_errstr(result)));
3043 result = cli_rpc_pipe_open_schannel_with_creds
3044 (conn->cli, &ndr_table_lsarpc, NCACN_NP,
3045 creds, p_creds, &conn->lsa_pipe);
3047 if (!NT_STATUS_IS_OK(result)) {
3048 DEBUG(10,("cm_connect_lsa: failed to connect to LSA pipe for "
3049 "domain %s using schannel. Error was %s\n",
3050 domain->name, nt_errstr(result) ));
3053 DEBUG(10,("cm_connect_lsa: connected to LSA pipe for domain %s using "
3054 "schannel.\n", domain->name ));
3056 result = rpccli_lsa_open_policy(conn->lsa_pipe, mem_ctx, True,
3057 SEC_FLAG_MAXIMUM_ALLOWED,
3059 if (NT_STATUS_IS_OK(result)) {
3063 DEBUG(10,("cm_connect_lsa: rpccli_lsa_open_policy failed, trying "
3066 TALLOC_FREE(conn->lsa_pipe);
3070 if (lp_winbind_sealed_pipes() || lp_require_strong_key()) {
3071 result = NT_STATUS_DOWNGRADE_DETECTED;
3072 DEBUG(1, ("Unwilling to make LSA connection to domain %s"
3073 "without connection level security, "
3074 "must set 'winbind sealed pipes = false' and "
3075 "'require strong key = false' to proceed: %s\n",
3076 domain->name, nt_errstr(result)));
3080 result = cli_rpc_pipe_open_noauth(conn->cli,
3083 if (!NT_STATUS_IS_OK(result)) {
3087 result = rpccli_lsa_open_policy(conn->lsa_pipe, mem_ctx, True,
3088 SEC_FLAG_MAXIMUM_ALLOWED,
3091 if (!NT_STATUS_IS_OK(result)) {
3092 invalidate_cm_connection(domain);
3096 *cli = conn->lsa_pipe;
3097 *lsa_policy = conn->lsa_policy;
3101 /****************************************************************************
3102 Open a LSA connection to a DC, suiteable for LSA lookup calls.
3103 ****************************************************************************/
3105 NTSTATUS cm_connect_lsat(struct winbindd_domain *domain,
3106 TALLOC_CTX *mem_ctx,
3107 struct rpc_pipe_client **cli,
3108 struct policy_handle *lsa_policy)
3112 if (domain->can_do_ncacn_ip_tcp) {
3113 status = cm_connect_lsa_tcp(domain, mem_ctx, cli);
3114 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) ||
3115 NT_STATUS_EQUAL(status, NT_STATUS_RPC_SEC_PKG_ERROR) ||
3116 NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_ACCESS_DENIED)) {
3117 invalidate_cm_connection(domain);
3118 status = cm_connect_lsa_tcp(domain, mem_ctx, cli);
3120 if (NT_STATUS_IS_OK(status)) {
3125 * we tried twice to connect via ncan_ip_tcp and schannel and
3126 * failed - maybe it is a trusted domain we can't connect to ?
3127 * do not try tcp next time - gd
3129 * This also prevents NETLOGON over TCP
3131 domain->can_do_ncacn_ip_tcp = false;
3134 status = cm_connect_lsa(domain, mem_ctx, cli, lsa_policy);
3139 /****************************************************************************
3140 Open the netlogon pipe to this DC. Use schannel if specified in client conf.
3141 session key stored in conn->netlogon_pipe->dc->sess_key.
3142 ****************************************************************************/
3144 static NTSTATUS cm_connect_netlogon_transport(struct winbindd_domain *domain,
3145 enum dcerpc_transport_t transport,
3146 struct rpc_pipe_client **cli)
3148 struct messaging_context *msg_ctx = winbind_messaging_context();
3149 struct winbindd_cm_conn *conn;
3151 enum netr_SchannelType sec_chan_type;
3152 struct netlogon_creds_CredentialState *netlogon_creds = NULL;
3153 struct cli_credentials *creds = NULL;
3157 result = init_dc_connection_rpc(domain, domain->rodc);
3158 if (!NT_STATUS_IS_OK(result)) {
3162 conn = &domain->conn;
3164 if (rpccli_is_connected(conn->netlogon_pipe)) {
3165 *cli = conn->netlogon_pipe;
3166 return NT_STATUS_OK;
3169 TALLOC_FREE(conn->netlogon_pipe);
3170 conn->netlogon_flags = 0;
3171 TALLOC_FREE(conn->netlogon_creds);
3173 result = get_trust_credentials(domain, talloc_tos(), true, &creds);
3174 if (!NT_STATUS_IS_OK(result)) {
3175 DEBUG(10, ("cm_connect_sam: No user available for "
3176 "domain %s when trying schannel\n", domain->name));
3177 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
3180 if (cli_credentials_is_anonymous(creds)) {
3181 DEBUG(1, ("get_trust_credential only gave anonymous for %s, unable to make get NETLOGON credentials\n",
3183 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
3186 sec_chan_type = cli_credentials_get_secure_channel_type(creds);
3187 if (sec_chan_type == SEC_CHAN_NULL) {
3188 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
3192 result = rpccli_create_netlogon_creds_with_creds(creds,
3196 &conn->netlogon_creds);
3197 if (!NT_STATUS_IS_OK(result)) {
3198 DEBUG(1, ("rpccli_create_netlogon_creds failed for %s, "
3199 "unable to create NETLOGON credentials: %s\n",
3200 domain->name, nt_errstr(result)));
3204 result = rpccli_setup_netlogon_creds_with_creds(conn->cli, transport,
3205 conn->netlogon_creds,
3206 conn->netlogon_force_reauth,
3208 conn->netlogon_force_reauth = false;
3209 if (!NT_STATUS_IS_OK(result)) {
3210 DEBUG(1, ("rpccli_setup_netlogon_creds failed for %s, "
3211 "unable to setup NETLOGON credentials: %s\n",
3212 domain->name, nt_errstr(result)));
3216 result = netlogon_creds_cli_get(conn->netlogon_creds,
3219 if (!NT_STATUS_IS_OK(result)) {
3220 DEBUG(1, ("netlogon_creds_cli_get failed for %s, "
3221 "unable to get NETLOGON credentials: %s\n",
3222 domain->name, nt_errstr(result)));
3225 conn->netlogon_flags = netlogon_creds->negotiate_flags;
3226 TALLOC_FREE(netlogon_creds);
3229 if (!(conn->netlogon_flags & NETLOGON_NEG_AUTHENTICATED_RPC)) {
3230 if (lp_winbind_sealed_pipes() || lp_require_strong_key()) {
3231 result = NT_STATUS_DOWNGRADE_DETECTED;
3232 DEBUG(1, ("Unwilling to make connection to domain %s"
3233 "without connection level security, "
3234 "must set 'winbind sealed pipes = false' and "
3235 "'require strong key = false' to proceed: %s\n",
3236 domain->name, nt_errstr(result)));
3237 invalidate_cm_connection(domain);
3240 result = cli_rpc_pipe_open_noauth_transport(conn->cli,
3242 &ndr_table_netlogon,
3243 &conn->netlogon_pipe);
3244 if (!NT_STATUS_IS_OK(result)) {
3245 invalidate_cm_connection(domain);
3249 *cli = conn->netlogon_pipe;
3250 return NT_STATUS_OK;
3253 /* Using the credentials from the first pipe, open a signed and sealed
3254 second netlogon pipe. The session key is stored in the schannel
3255 part of the new pipe auth struct.
3258 result = cli_rpc_pipe_open_schannel_with_creds(
3259 conn->cli, &ndr_table_netlogon, transport,
3261 conn->netlogon_creds,
3262 &conn->netlogon_pipe);
3263 if (!NT_STATUS_IS_OK(result)) {
3264 DEBUG(3, ("Could not open schannel'ed NETLOGON pipe. Error "
3265 "was %s\n", nt_errstr(result)));
3267 invalidate_cm_connection(domain);
3271 *cli = conn->netlogon_pipe;
3272 return NT_STATUS_OK;
3275 /****************************************************************************
3276 Open a LSA connection to a DC, suiteable for LSA lookup calls.
3277 ****************************************************************************/
3279 NTSTATUS cm_connect_netlogon(struct winbindd_domain *domain,
3280 struct rpc_pipe_client **cli)
3284 status = init_dc_connection_rpc(domain, domain->rodc);
3285 if (!NT_STATUS_IS_OK(status)) {
3289 if (domain->active_directory && domain->can_do_ncacn_ip_tcp) {
3290 status = cm_connect_netlogon_transport(domain, NCACN_IP_TCP, cli);
3291 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) ||
3292 NT_STATUS_EQUAL(status, NT_STATUS_RPC_SEC_PKG_ERROR) ||
3293 NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_ACCESS_DENIED)) {
3294 invalidate_cm_connection(domain);
3295 status = cm_connect_netlogon_transport(domain, NCACN_IP_TCP, cli);
3297 if (NT_STATUS_IS_OK(status)) {
3302 * we tried twice to connect via ncan_ip_tcp and schannel and
3303 * failed - maybe it is a trusted domain we can't connect to ?
3304 * do not try tcp next time - gd
3306 * This also prevents LSA over TCP
3308 domain->can_do_ncacn_ip_tcp = false;
3311 status = cm_connect_netlogon_transport(domain, NCACN_NP, cli);
3316 void winbind_msg_ip_dropped(struct messaging_context *msg_ctx,
3319 struct server_id server_id,
3322 struct winbindd_domain *domain;
3323 char *freeit = NULL;
3327 || (data->data == NULL)
3328 || (data->length == 0)
3329 || (data->data[data->length-1] != '\0')) {
3330 DEBUG(1, ("invalid msg_ip_dropped message: not a valid "
3335 addr = (char *)data->data;
3336 DEBUG(10, ("IP %s dropped\n", addr));
3338 if (!is_ipaddress(addr)) {
3341 * Some code sends us ip addresses with the /netmask
3344 slash = strchr(addr, '/');
3345 if (slash == NULL) {
3346 DEBUG(1, ("invalid msg_ip_dropped message: %s",
3350 freeit = talloc_strndup(talloc_tos(), addr, slash-addr);
3351 if (freeit == NULL) {
3352 DEBUG(1, ("talloc failed\n"));
3356 DEBUG(10, ("Stripped /netmask to IP %s\n", addr));
3359 for (domain = domain_list(); domain != NULL; domain = domain->next) {
3360 char sockaddr[INET6_ADDRSTRLEN];
3362 if (!cli_state_is_connected(domain->conn.cli)) {
3366 print_sockaddr(sockaddr, sizeof(sockaddr),
3367 smbXcli_conn_local_sockaddr(domain->conn.cli->conn));
3369 if (strequal(sockaddr, addr)) {
3370 smbXcli_conn_disconnect(domain->conn.cli->conn, NT_STATUS_OK);
3373 TALLOC_FREE(freeit);