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s3: Fix bug #9085.
[Samba.git] / source3 / libsmb / libsmb_server.c
blob6ad3bf9e215596785ad5bb553c83a328699b1fd5
1 /*
2 Unix SMB/Netbios implementation.
3 SMB client library implementation
4 Copyright (C) Andrew Tridgell 1998
5 Copyright (C) Richard Sharpe 2000, 2002
6 Copyright (C) John Terpstra 2000
7 Copyright (C) Tom Jansen (Ninja ISD) 2002
8 Copyright (C) Derrell Lipman 2003-2008
9 Copyright (C) Jeremy Allison 2007, 2008
10 Copyright (C) SATOH Fumiyasu <fumiyas@osstech.co.jp> 2009.
11
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.
16
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.
21
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/>.
24 */
25
26 #include "includes.h"
27 #include "libsmbclient.h"
28 #include "libsmb_internal.h"
29
30
31 /*
32 * Check a server for being alive and well.
33 * returns 0 if the server is in shape. Returns 1 on error
34 *
35 * Also useable outside libsmbclient to enable external cache
36 * to do some checks too.
37 */
38 int
39 SMBC_check_server(SMBCCTX * context,
40 SMBCSRV * server)
41 {
42 socklen_t size;
43 struct sockaddr addr;
44
45 size = sizeof(addr);
46 return (getpeername(server->cli->fd, &addr, &size) == -1);
47 }
48
49 /*
50 * Remove a server from the cached server list it's unused.
51 * On success, 0 is returned. 1 is returned if the server could not be removed.
52 *
53 * Also useable outside libsmbclient
54 */
55 int
56 SMBC_remove_unused_server(SMBCCTX * context,
57 SMBCSRV * srv)
58 {
59 SMBCFILE * file;
60
61 /* are we being fooled ? */
62 if (!context || !context->internal->initialized || !srv) {
63 return 1;
64 }
65
66 /* Check all open files/directories for a relation with this server */
67 for (file = context->internal->files; file; file = file->next) {
68 if (file->srv == srv) {
69 /* Still used */
70 DEBUG(3, ("smbc_remove_usused_server: "
71 "%p still used by %p.\n",
72 srv, file));
73 return 1;
74 }
75 }
76
77 DLIST_REMOVE(context->internal->servers, srv);
78
79 cli_shutdown(srv->cli);
80 srv->cli = NULL;
81
82 DEBUG(3, ("smbc_remove_usused_server: %p removed.\n", srv));
83
84 smbc_getFunctionRemoveCachedServer(context)(context, srv);
85
86 SAFE_FREE(srv);
87 return 0;
88 }
89
90 /****************************************************************
91 * Call the auth_fn with fixed size (fstring) buffers.
92 ***************************************************************/
93 void
94 SMBC_call_auth_fn(TALLOC_CTX *ctx,
95 SMBCCTX *context,
96 const char *server,
97 const char *share,
98 char **pp_workgroup,
99 char **pp_username,
100 char **pp_password)
101 {
102 fstring workgroup;
103 fstring username;
104 fstring password;
105 smbc_get_auth_data_with_context_fn auth_with_context_fn;
106
107 strlcpy(workgroup, *pp_workgroup, sizeof(workgroup));
108 strlcpy(username, *pp_username, sizeof(username));
109 strlcpy(password, *pp_password, sizeof(password));
110
111 /* See if there's an authentication with context function provided */
112 auth_with_context_fn = smbc_getFunctionAuthDataWithContext(context);
113 if (auth_with_context_fn)
114 {
115 (* auth_with_context_fn)(context,
116 server, share,
117 workgroup, sizeof(workgroup),
118 username, sizeof(username),
119 password, sizeof(password));
120 }
121 else
122 {
123 smbc_getFunctionAuthData(context)(server, share,
124 workgroup, sizeof(workgroup),
125 username, sizeof(username),
126 password, sizeof(password));
127 }
128
129 TALLOC_FREE(*pp_workgroup);
130 TALLOC_FREE(*pp_username);
131 TALLOC_FREE(*pp_password);
132
133 *pp_workgroup = talloc_strdup(ctx, workgroup);
134 *pp_username = talloc_strdup(ctx, username);
135 *pp_password = talloc_strdup(ctx, password);
136 }
137
138
139 void
140 SMBC_get_auth_data(const char *server, const char *share,
141 char *workgroup_buf, int workgroup_buf_len,
142 char *username_buf, int username_buf_len,
143 char *password_buf, int password_buf_len)
144 {
145 /* Default function just uses provided data. Nothing to do. */
146 }
147
148
149
150 SMBCSRV *
151 SMBC_find_server(TALLOC_CTX *ctx,
152 SMBCCTX *context,
153 const char *server,
154 const char *share,
155 char **pp_workgroup,
156 char **pp_username,
157 char **pp_password)
158 {
159 SMBCSRV *srv;
160 int auth_called = 0;
161
162 if (!pp_workgroup || !pp_username || !pp_password) {
163 return NULL;
164 }
165
166 check_server_cache:
167
168 srv = smbc_getFunctionGetCachedServer(context)(context,
169 server, share,
170 *pp_workgroup,
171 *pp_username);
172
173 if (!auth_called && !srv && (!*pp_username || !(*pp_username)[0] ||
174 !*pp_password || !(*pp_password)[0])) {
175 SMBC_call_auth_fn(ctx, context, server, share,
176 pp_workgroup, pp_username, pp_password);
177
178 /*
179 * However, smbc_auth_fn may have picked up info relating to
180 * an existing connection, so try for an existing connection
181 * again ...
182 */
183 auth_called = 1;
184 goto check_server_cache;
185
186 }
187
188 if (srv) {
189 if (smbc_getFunctionCheckServer(context)(context, srv)) {
190 /*
191 * This server is no good anymore
192 * Try to remove it and check for more possible
193 * servers in the cache
194 */
195 if (smbc_getFunctionRemoveUnusedServer(context)(context,
196 srv)) {
197 /*
198 * We could not remove the server completely,
199 * remove it from the cache so we will not get
200 * it again. It will be removed when the last
201 * file/dir is closed.
202 */
203 smbc_getFunctionRemoveCachedServer(context)(context,
204 srv);
205 }
206
207 /*
208 * Maybe there are more cached connections to this
209 * server
210 */
211 goto check_server_cache;
212 }
213
214 return srv;
215 }
216
217 return NULL;
218 }
219
220 /*
221 * Connect to a server, possibly on an existing connection
222 *
223 * Here, what we want to do is: If the server and username
224 * match an existing connection, reuse that, otherwise, establish a
225 * new connection.
226 *
227 * If we have to create a new connection, call the auth_fn to get the
228 * info we need, unless the username and password were passed in.
229 */
230
231 static SMBCSRV *
232 SMBC_server_internal(TALLOC_CTX *ctx,
233 SMBCCTX *context,
234 bool connect_if_not_found,
235 const char *server,
236 const char *share,
237 char **pp_workgroup,
238 char **pp_username,
239 char **pp_password,
240 bool *in_cache)
241 {
242 SMBCSRV *srv=NULL;
243 char *workgroup = NULL;
244 struct cli_state *c;
245 struct nmb_name called, calling;
246 const char *server_n = server;
247 struct sockaddr_storage ss;
248 int tried_reverse = 0;
249 int port_try_first;
250 int port_try_next;
251 int is_ipc = (share != NULL && strcmp(share, "IPC$") == 0);
252 uint32 fs_attrs = 0;
253 const char *username_used;
254 NTSTATUS status;
255 char *newserver, *newshare;
256
257 zero_sockaddr(&ss);
258 ZERO_STRUCT(c);
259 *in_cache = false;
260
261 if (server[0] == 0) {
262 errno = EPERM;
263 return NULL;
264 }
265
266 /* Look for a cached connection */
267 srv = SMBC_find_server(ctx, context, server, share,
268 pp_workgroup, pp_username, pp_password);
269
270 /*
271 * If we found a connection and we're only allowed one share per
272 * server...
273 */
274 if (srv &&
275 *share != '\0' &&
276 smbc_getOptionOneSharePerServer(context)) {
277
278 /*
279 * ... then if there's no current connection to the share,
280 * connect to it. SMBC_find_server(), or rather the function
281 * pointed to by context->get_cached_srv_fn which
282 * was called by SMBC_find_server(), will have issued a tree
283 * disconnect if the requested share is not the same as the
284 * one that was already connected.
285 */
286
287 /*
288 * Use srv->cli->desthost and srv->cli->share instead of
289 * server and share below to connect to the actual share,
290 * i.e., a normal share or a referred share from
291 * 'msdfs proxy' share.
292 */
293 if (srv->cli->cnum == (uint16) -1) {
294 /* Ensure we have accurate auth info */
295 SMBC_call_auth_fn(ctx, context,
296 srv->cli->desthost,
297 srv->cli->share,
298 pp_workgroup,
299 pp_username,
300 pp_password);
301
302 if (!*pp_workgroup || !*pp_username || !*pp_password) {
303 errno = ENOMEM;
304 cli_shutdown(srv->cli);
305 srv->cli = NULL;
306 smbc_getFunctionRemoveCachedServer(context)(context,
307 srv);
308 return NULL;
309 }
310
311 /*
312 * We don't need to renegotiate encryption
313 * here as the encryption context is not per
314 * tid.
315 */
316
317 status = cli_tcon_andx(srv->cli, srv->cli->share, "?????",
318 *pp_password,
319 strlen(*pp_password)+1);
320 if (!NT_STATUS_IS_OK(status)) {
321 errno = map_errno_from_nt_status(status);
322 cli_shutdown(srv->cli);
323 srv->cli = NULL;
324 smbc_getFunctionRemoveCachedServer(context)(context,
325 srv);
326 srv = NULL;
327 }
328
329 /* Determine if this share supports case sensitivity */
330 if (is_ipc) {
331 DEBUG(4,
332 ("IPC$ so ignore case sensitivity\n"));
333 } else if (!cli_get_fs_attr_info(c, &fs_attrs)) {
334 DEBUG(4, ("Could not retrieve "
335 "case sensitivity flag: %s.\n",
336 cli_errstr(c)));
337
338 /*
339 * We can't determine the case sensitivity of
340 * the share. We have no choice but to use the
341 * user-specified case sensitivity setting.
342 */
343 if (smbc_getOptionCaseSensitive(context)) {
344 cli_set_case_sensitive(c, True);
345 } else {
346 cli_set_case_sensitive(c, False);
347 }
348 } else {
349 DEBUG(4,
350 ("Case sensitive: %s\n",
351 (fs_attrs & FILE_CASE_SENSITIVE_SEARCH
352 ? "True"
353 : "False")));
354 cli_set_case_sensitive(
355 c,
356 (fs_attrs & FILE_CASE_SENSITIVE_SEARCH
357 ? True
358 : False));
359 }
360
361 /*
362 * Regenerate the dev value since it's based on both
363 * server and share
364 */
365 if (srv) {
366 srv->dev = (dev_t)(str_checksum(srv->cli->desthost) ^
367 str_checksum(srv->cli->share));
368 }
369 }
370 }
371
372 /* If we have a connection... */
373 if (srv) {
374
375 /* ... then we're done here. Give 'em what they came for. */
376 *in_cache = true;
377 goto done;
378 }
379
380 /* If we're not asked to connect when a connection doesn't exist... */
381 if (! connect_if_not_found) {
382 /* ... then we're done here. */
383 return NULL;
384 }
385
386 if (!*pp_workgroup || !*pp_username || !*pp_password) {
387 errno = ENOMEM;
388 return NULL;
389 }
390
391 make_nmb_name(&calling, smbc_getNetbiosName(context), 0x0);
392 make_nmb_name(&called , server, 0x20);
393
394 DEBUG(4,("SMBC_server: server_n=[%s] server=[%s]\n", server_n, server));
395
396 DEBUG(4,(" -> server_n=[%s] server=[%s]\n", server_n, server));
397
398 again:
399
400 zero_sockaddr(&ss);
401
402 /* have to open a new connection */
403 if ((c = cli_initialise()) == NULL) {
404 errno = ENOMEM;
405 return NULL;
406 }
407
408 if (smbc_getOptionUseKerberos(context)) {
409 c->use_kerberos = True;
410 }
411
412 if (smbc_getOptionFallbackAfterKerberos(context)) {
413 c->fallback_after_kerberos = True;
414 }
415
416 if (smbc_getOptionUseCCache(context)) {
417 c->use_ccache = True;
418 }
419
420 c->timeout = smbc_getTimeout(context);
421
422 /*
423 * Force use of port 139 for first try if share is $IPC, empty, or
424 * null, so browse lists can work
425 */
426 if (share == NULL || *share == '\0' || is_ipc) {
427 port_try_first = 139;
428 port_try_next = 445;
429 } else {
430 port_try_first = 445;
431 port_try_next = 139;
432 }
433
434 c->port = port_try_first;
435
436 status = cli_connect(c, server_n, &ss);
437 if (!NT_STATUS_IS_OK(status)) {
438
439 /* First connection attempt failed. Try alternate port. */
440 c->port = port_try_next;
441
442 status = cli_connect(c, server_n, &ss);
443 if (!NT_STATUS_IS_OK(status)) {
444 cli_shutdown(c);
445 errno = ETIMEDOUT;
446 return NULL;
447 }
448 }
449
450 if (!cli_session_request(c, &calling, &called)) {
451 cli_shutdown(c);
452 if (strcmp(called.name, "*SMBSERVER")) {
453 make_nmb_name(&called , "*SMBSERVER", 0x20);
454 goto again;
455 } else { /* Try one more time, but ensure we don't loop */
456
457 /* Only try this if server is an IP address ... */
458
459 if (is_ipaddress(server) && !tried_reverse) {
460 fstring remote_name;
461 struct sockaddr_storage rem_ss;
462
463 if (!interpret_string_addr(&rem_ss, server,
464 NI_NUMERICHOST)) {
465 DEBUG(4, ("Could not convert IP address "
466 "%s to struct sockaddr_storage\n",
467 server));
468 errno = ETIMEDOUT;
469 return NULL;
470 }
471
472 tried_reverse++; /* Yuck */
473
474 if (name_status_find("*", 0, 0,
475 &rem_ss, remote_name)) {
476 make_nmb_name(&called,
477 remote_name,
478 0x20);
479 goto again;
480 }
481 }
482 }
483 errno = ETIMEDOUT;
484 return NULL;
485 }
486
487 DEBUG(4,(" session request ok\n"));
488
489 status = cli_negprot(c);
490
491 if (!NT_STATUS_IS_OK(status)) {
492 cli_shutdown(c);
493 errno = ETIMEDOUT;
494 return NULL;
495 }
496
497 username_used = *pp_username;
498
499 if (!NT_STATUS_IS_OK(cli_session_setup(c, username_used,
500 *pp_password,
501 strlen(*pp_password),
502 *pp_password,
503 strlen(*pp_password),
504 *pp_workgroup))) {
505
506 /* Failed. Try an anonymous login, if allowed by flags. */
507 username_used = "";
508
509 if (smbc_getOptionNoAutoAnonymousLogin(context) ||
510 !NT_STATUS_IS_OK(cli_session_setup(c, username_used,
511 *pp_password, 1,
512 *pp_password, 0,
513 *pp_workgroup))) {
514
515 cli_shutdown(c);
516 errno = EPERM;
517 return NULL;
518 }
519 }
520
521 status = cli_init_creds(c, username_used,
522 *pp_workgroup, *pp_password);
523 if (!NT_STATUS_IS_OK(status)) {
524 errno = map_errno_from_nt_status(status);
525 cli_shutdown(c);
526 return NULL;
527 }
528
529 DEBUG(4,(" session setup ok\n"));
530
531 /* here's the fun part....to support 'msdfs proxy' shares
532 (on Samba or windows) we have to issues a TRANS_GET_DFS_REFERRAL
533 here before trying to connect to the original share.
534 cli_check_msdfs_proxy() will fail if it is a normal share. */
535
536 if ((c->capabilities & CAP_DFS) &&
537 cli_check_msdfs_proxy(ctx, c, share,
538 &newserver, &newshare,
539 /* FIXME: cli_check_msdfs_proxy() does
540 not support smbc_smb_encrypt_level type */
541 context->internal->smb_encryption_level ?
542 true : false,
543 *pp_username,
544 *pp_password,
545 *pp_workgroup)) {
546 cli_shutdown(c);
547 srv = SMBC_server_internal(ctx, context, connect_if_not_found,
548 newserver, newshare, pp_workgroup,
549 pp_username, pp_password, in_cache);
550 TALLOC_FREE(newserver);
551 TALLOC_FREE(newshare);
552 return srv;
553 }
554
555 /* must be a normal share */
556
557 status = cli_tcon_andx(c, share, "?????", *pp_password,
558 strlen(*pp_password)+1);
559 if (!NT_STATUS_IS_OK(status)) {
560 errno = map_errno_from_nt_status(status);
561 cli_shutdown(c);
562 return NULL;
563 }
564
565 DEBUG(4,(" tconx ok\n"));
566
567 /* Determine if this share supports case sensitivity */
568 if (is_ipc) {
569 DEBUG(4, ("IPC$ so ignore case sensitivity\n"));
570 } else if (!cli_get_fs_attr_info(c, &fs_attrs)) {
571 DEBUG(4, ("Could not retrieve case sensitivity flag: %s.\n",
572 cli_errstr(c)));
573
574 /*
575 * We can't determine the case sensitivity of the share. We
576 * have no choice but to use the user-specified case
577 * sensitivity setting.
578 */
579 if (smbc_getOptionCaseSensitive(context)) {
580 cli_set_case_sensitive(c, True);
581 } else {
582 cli_set_case_sensitive(c, False);
583 }
584 } else {
585 DEBUG(4, ("Case sensitive: %s\n",
586 (fs_attrs & FILE_CASE_SENSITIVE_SEARCH
587 ? "True"
588 : "False")));
589 cli_set_case_sensitive(c,
590 (fs_attrs & FILE_CASE_SENSITIVE_SEARCH
591 ? True
592 : False));
593 }
594
595 if (context->internal->smb_encryption_level) {
596 /* Attempt UNIX smb encryption. */
597 if (!NT_STATUS_IS_OK(cli_force_encryption(c,
598 username_used,
599 *pp_password,
600 *pp_workgroup))) {
601
602 /*
603 * context->smb_encryption_level == 1
604 * means don't fail if encryption can't be negotiated,
605 * == 2 means fail if encryption can't be negotiated.
606 */
607
608 DEBUG(4,(" SMB encrypt failed\n"));
609
610 if (context->internal->smb_encryption_level == 2) {
611 cli_shutdown(c);
612 errno = EPERM;
613 return NULL;
614 }
615 }
616 DEBUG(4,(" SMB encrypt ok\n"));
617 }
618
619 /*
620 * Ok, we have got a nice connection
621 * Let's allocate a server structure.
622 */
623
624 srv = SMB_MALLOC_P(SMBCSRV);
625 if (!srv) {
626 cli_shutdown(c);
627 errno = ENOMEM;
628 return NULL;
629 }
630
631 ZERO_STRUCTP(srv);
632 srv->cli = c;
633 srv->dev = (dev_t)(str_checksum(server) ^ str_checksum(share));
634 srv->no_pathinfo = False;
635 srv->no_pathinfo2 = False;
636 srv->no_nt_session = False;
637
638 done:
639 if (!pp_workgroup || !*pp_workgroup || !**pp_workgroup) {
640 workgroup = talloc_strdup(ctx, smbc_getWorkgroup(context));
641 } else {
642 workgroup = *pp_workgroup;
643 }
644 if(!workgroup) {
645 return NULL;
646 }
647
648 /* set the credentials to make DFS work */
649 smbc_set_credentials_with_fallback(context,
650 workgroup,
651 *pp_username,
652 *pp_password);
653
654 return srv;
655 }
656
657 SMBCSRV *
658 SMBC_server(TALLOC_CTX *ctx,
659 SMBCCTX *context,
660 bool connect_if_not_found,
661 const char *server,
662 const char *share,
663 char **pp_workgroup,
664 char **pp_username,
665 char **pp_password)
666 {
667 SMBCSRV *srv=NULL;
668 bool in_cache = false;
669
670 srv = SMBC_server_internal(ctx, context, connect_if_not_found,
671 server, share, pp_workgroup,
672 pp_username, pp_password, &in_cache);
673
674 if (!srv) {
675 return NULL;
676 }
677 if (in_cache) {
678 return srv;
679 }
680
681 /* Now add it to the cache (internal or external) */
682 /* Let the cache function set errno if it wants to */
683 errno = 0;
684 if (smbc_getFunctionAddCachedServer(context)(context, srv,
685 server, share,
686 *pp_workgroup,
687 *pp_username)) {
688 int saved_errno = errno;
689 DEBUG(3, (" Failed to add server to cache\n"));
690 errno = saved_errno;
691 if (errno == 0) {
692 errno = ENOMEM;
693 }
694 SAFE_FREE(srv);
695 return NULL;
696 }
697
698 DEBUG(2, ("Server connect ok: //%s/%s: %p\n",
699 server, share, srv));
700
701 DLIST_ADD(context->internal->servers, srv);
702 return srv;
703 }
704
705 /*
706 * Connect to a server for getting/setting attributes, possibly on an existing
707 * connection. This works similarly to SMBC_server().
708 */
709 SMBCSRV *
710 SMBC_attr_server(TALLOC_CTX *ctx,
711 SMBCCTX *context,
712 const char *server,
713 const char *share,
714 char **pp_workgroup,
715 char **pp_username,
716 char **pp_password)
717 {
718 int flags;
719 struct sockaddr_storage ss;
720 struct cli_state *ipc_cli = NULL;
721 struct rpc_pipe_client *pipe_hnd = NULL;
722 NTSTATUS nt_status;
723 SMBCSRV *srv=NULL;
724 SMBCSRV *ipc_srv=NULL;
725
726 /*
727 * Use srv->cli->desthost and srv->cli->share instead of
728 * server and share below to connect to the actual share,
729 * i.e., a normal share or a referred share from
730 * 'msdfs proxy' share.
731 */
732 srv = SMBC_server(ctx, context, true, server, share,
733 pp_workgroup, pp_username, pp_password);
734 if (!srv) {
735 return NULL;
736 }
737 server = srv->cli->desthost;
738 share = srv->cli->share;
739
740 /*
741 * See if we've already created this special connection. Reference
742 * our "special" share name '*IPC$', which is an impossible real share
743 * name due to the leading asterisk.
744 */
745 ipc_srv = SMBC_find_server(ctx, context, server, "*IPC$",
746 pp_workgroup, pp_username, pp_password);
747 if (!ipc_srv) {
748
749 /* We didn't find a cached connection. Get the password */
750 if (!*pp_password || (*pp_password)[0] == '\0') {
751 /* ... then retrieve it now. */
752 SMBC_call_auth_fn(ctx, context, server, share,
753 pp_workgroup,
754 pp_username,
755 pp_password);
756 if (!*pp_workgroup || !*pp_username || !*pp_password) {
757 errno = ENOMEM;
758 return NULL;
759 }
760 }
761
762 flags = 0;
763 if (smbc_getOptionUseKerberos(context)) {
764 flags |= CLI_FULL_CONNECTION_USE_KERBEROS;
765 }
766 if (smbc_getOptionUseCCache(context)) {
767 flags |= CLI_FULL_CONNECTION_USE_CCACHE;
768 }
769
770 zero_sockaddr(&ss);
771 nt_status = cli_full_connection(&ipc_cli,
772 global_myname(), server,
773 &ss, 0, "IPC$", "?????",
774 *pp_username,
775 *pp_workgroup,
776 *pp_password,
777 flags,
778 Undefined, NULL);
779 if (! NT_STATUS_IS_OK(nt_status)) {
780 DEBUG(1,("cli_full_connection failed! (%s)\n",
781 nt_errstr(nt_status)));
782 errno = ENOTSUP;
783 return NULL;
784 }
785
786 if (context->internal->smb_encryption_level) {
787 /* Attempt UNIX smb encryption. */
788 if (!NT_STATUS_IS_OK(cli_force_encryption(ipc_cli,
789 *pp_username,
790 *pp_password,
791 *pp_workgroup))) {
792
793 /*
794 * context->smb_encryption_level ==
795 * 1 means don't fail if encryption can't be
796 * negotiated, == 2 means fail if encryption
797 * can't be negotiated.
798 */
799
800 DEBUG(4,(" SMB encrypt failed on IPC$\n"));
801
802 if (context->internal->smb_encryption_level == 2) {
803 cli_shutdown(ipc_cli);
804 errno = EPERM;
805 return NULL;
806 }
807 }
808 DEBUG(4,(" SMB encrypt ok on IPC$\n"));
809 }
810
811 ipc_srv = SMB_MALLOC_P(SMBCSRV);
812 if (!ipc_srv) {
813 errno = ENOMEM;
814 cli_shutdown(ipc_cli);
815 return NULL;
816 }
817
818 ZERO_STRUCTP(ipc_srv);
819 ipc_srv->cli = ipc_cli;
820
821 nt_status = cli_rpc_pipe_open_noauth(
822 ipc_srv->cli, &ndr_table_lsarpc.syntax_id, &pipe_hnd);
823 if (!NT_STATUS_IS_OK(nt_status)) {
824 DEBUG(1, ("cli_nt_session_open fail!\n"));
825 errno = ENOTSUP;
826 cli_shutdown(ipc_srv->cli);
827 free(ipc_srv);
828 return NULL;
829 }
830
831 /*
832 * Some systems don't support
833 * SEC_FLAG_MAXIMUM_ALLOWED, but NT sends 0x2000000
834 * so we might as well do it too.
835 */
836
837 nt_status = rpccli_lsa_open_policy(
838 pipe_hnd,
839 talloc_tos(),
840 True,
841 GENERIC_EXECUTE_ACCESS,
842 &ipc_srv->pol);
843
844 if (!NT_STATUS_IS_OK(nt_status)) {
845 errno = SMBC_errno(context, ipc_srv->cli);
846 cli_shutdown(ipc_srv->cli);
847 return NULL;
848 }
849
850 /* now add it to the cache (internal or external) */
851
852 errno = 0; /* let cache function set errno if it likes */
853 if (smbc_getFunctionAddCachedServer(context)(context, ipc_srv,
854 server,
855 "*IPC$",
856 *pp_workgroup,
857 *pp_username)) {
858 DEBUG(3, (" Failed to add server to cache\n"));
859 if (errno == 0) {
860 errno = ENOMEM;
861 }
862 cli_shutdown(ipc_srv->cli);
863 free(ipc_srv);
864 return NULL;
865 }
866
867 DLIST_ADD(context->internal->servers, ipc_srv);
868 }
869
870 return ipc_srv;
871 }
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