source: vendor/3.6.23/source3/libsmb/libsmb_server.c

Last change on this file was 740, checked in by Silvan Scherrer, 13 years ago

Samba Server: update vendor to 3.6.0
File size: 28.4 KB
Line 
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 "libsmb/libsmb.h"
28#include "libsmbclient.h"
29#include "libsmb_internal.h"
30#include "../librpc/gen_ndr/ndr_lsa.h"
31#include "rpc_client/cli_pipe.h"
32#include "rpc_client/cli_lsarpc.h"
33#include "libcli/security/security.h"
34#include "libsmb/nmblib.h"
35
36/*
37 * Check a server for being alive and well.
38 * returns 0 if the server is in shape. Returns 1 on error
39 *
40 * Also useable outside libsmbclient to enable external cache
41 * to do some checks too.
42 */
43int
44SMBC_check_server(SMBCCTX * context,
45 SMBCSRV * server)
46{
47 socklen_t size;
48 struct sockaddr addr;
49
50 size = sizeof(addr);
51 return (getpeername(server->cli->fd, &addr, &size) == -1);
52}
53
54/*
55 * Remove a server from the cached server list it's unused.
56 * On success, 0 is returned. 1 is returned if the server could not be removed.
57 *
58 * Also useable outside libsmbclient
59 */
60int
61SMBC_remove_unused_server(SMBCCTX * context,
62 SMBCSRV * srv)
63{
64 SMBCFILE * file;
65
66 /* are we being fooled ? */
67 if (!context || !context->internal->initialized || !srv) {
68 return 1;
69 }
70
71 /* Check all open files/directories for a relation with this server */
72 for (file = context->internal->files; file; file = file->next) {
73 if (file->srv == srv) {
74 /* Still used */
75 DEBUG(3, ("smbc_remove_usused_server: "
76 "%p still used by %p.\n",
77 srv, file));
78 return 1;
79 }
80 }
81
82 DLIST_REMOVE(context->internal->servers, srv);
83
84 cli_shutdown(srv->cli);
85 srv->cli = NULL;
86
87 DEBUG(3, ("smbc_remove_usused_server: %p removed.\n", srv));
88
89 smbc_getFunctionRemoveCachedServer(context)(context, srv);
90
91 SAFE_FREE(srv);
92 return 0;
93}
94
95/****************************************************************
96 * Call the auth_fn with fixed size (fstring) buffers.
97 ***************************************************************/
98void
99SMBC_call_auth_fn(TALLOC_CTX *ctx,
100 SMBCCTX *context,
101 const char *server,
102 const char *share,
103 char **pp_workgroup,
104 char **pp_username,
105 char **pp_password)
106{
107 fstring workgroup;
108 fstring username;
109 fstring password;
110 smbc_get_auth_data_with_context_fn auth_with_context_fn;
111
112 strlcpy(workgroup, *pp_workgroup, sizeof(workgroup));
113 strlcpy(username, *pp_username, sizeof(username));
114 strlcpy(password, *pp_password, sizeof(password));
115
116 /* See if there's an authentication with context function provided */
117 auth_with_context_fn = smbc_getFunctionAuthDataWithContext(context);
118 if (auth_with_context_fn)
119 {
120 (* auth_with_context_fn)(context,
121 server, share,
122 workgroup, sizeof(workgroup),
123 username, sizeof(username),
124 password, sizeof(password));
125 }
126 else
127 {
128 smbc_getFunctionAuthData(context)(server, share,
129 workgroup, sizeof(workgroup),
130 username, sizeof(username),
131 password, sizeof(password));
132 }
133
134 TALLOC_FREE(*pp_workgroup);
135 TALLOC_FREE(*pp_username);
136 TALLOC_FREE(*pp_password);
137
138 *pp_workgroup = talloc_strdup(ctx, workgroup);
139 *pp_username = talloc_strdup(ctx, username);
140 *pp_password = talloc_strdup(ctx, password);
141}
142
143
144void
145SMBC_get_auth_data(const char *server, const char *share,
146 char *workgroup_buf, int workgroup_buf_len,
147 char *username_buf, int username_buf_len,
148 char *password_buf, int password_buf_len)
149{
150 /* Default function just uses provided data. Nothing to do. */
151}
152
153
154
155SMBCSRV *
156SMBC_find_server(TALLOC_CTX *ctx,
157 SMBCCTX *context,
158 const char *server,
159 const char *share,
160 char **pp_workgroup,
161 char **pp_username,
162 char **pp_password)
163{
164 SMBCSRV *srv;
165 int auth_called = 0;
166
167 if (!pp_workgroup || !pp_username || !pp_password) {
168 return NULL;
169 }
170
171check_server_cache:
172
173 srv = smbc_getFunctionGetCachedServer(context)(context,
174 server, share,
175 *pp_workgroup,
176 *pp_username);
177
178 if (!auth_called && !srv && (!*pp_username || !(*pp_username)[0] ||
179 !*pp_password || !(*pp_password)[0])) {
180 SMBC_call_auth_fn(ctx, context, server, share,
181 pp_workgroup, pp_username, pp_password);
182
183 /*
184 * However, smbc_auth_fn may have picked up info relating to
185 * an existing connection, so try for an existing connection
186 * again ...
187 */
188 auth_called = 1;
189 goto check_server_cache;
190
191 }
192
193 if (srv) {
194 if (smbc_getFunctionCheckServer(context)(context, srv)) {
195 /*
196 * This server is no good anymore
197 * Try to remove it and check for more possible
198 * servers in the cache
199 */
200 if (smbc_getFunctionRemoveUnusedServer(context)(context,
201 srv)) {
202 /*
203 * We could not remove the server completely,
204 * remove it from the cache so we will not get
205 * it again. It will be removed when the last
206 * file/dir is closed.
207 */
208 smbc_getFunctionRemoveCachedServer(context)(context,
209 srv);
210 }
211
212 /*
213 * Maybe there are more cached connections to this
214 * server
215 */
216 goto check_server_cache;
217 }
218
219 return srv;
220 }
221
222 return NULL;
223}
224
225/*
226 * Connect to a server, possibly on an existing connection
227 *
228 * Here, what we want to do is: If the server and username
229 * match an existing connection, reuse that, otherwise, establish a
230 * new connection.
231 *
232 * If we have to create a new connection, call the auth_fn to get the
233 * info we need, unless the username and password were passed in.
234 */
235
236static SMBCSRV *
237SMBC_server_internal(TALLOC_CTX *ctx,
238 SMBCCTX *context,
239 bool connect_if_not_found,
240 const char *server,
241 const char *share,
242 char **pp_workgroup,
243 char **pp_username,
244 char **pp_password,
245 bool *in_cache)
246{
247 SMBCSRV *srv=NULL;
248 char *workgroup = NULL;
249 struct cli_state *c;
250 struct nmb_name called, calling;
251 const char *server_n = server;
252 struct sockaddr_storage ss;
253 int tried_reverse = 0;
254 int port_try_first;
255 int port_try_next;
256 int is_ipc = (share != NULL && strcmp(share, "IPC$") == 0);
257 uint32 fs_attrs = 0;
258 const char *username_used;
259 NTSTATUS status;
260 char *newserver, *newshare;
261
262 zero_sockaddr(&ss);
263 ZERO_STRUCT(c);
264 *in_cache = false;
265
266 if (server[0] == 0) {
267 errno = EPERM;
268 return NULL;
269 }
270
271 /* Look for a cached connection */
272 srv = SMBC_find_server(ctx, context, server, share,
273 pp_workgroup, pp_username, pp_password);
274
275 /*
276 * If we found a connection and we're only allowed one share per
277 * server...
278 */
279 if (srv &&
280 *share != '\0' &&
281 smbc_getOptionOneSharePerServer(context)) {
282
283 /*
284 * ... then if there's no current connection to the share,
285 * connect to it. SMBC_find_server(), or rather the function
286 * pointed to by context->get_cached_srv_fn which
287 * was called by SMBC_find_server(), will have issued a tree
288 * disconnect if the requested share is not the same as the
289 * one that was already connected.
290 */
291
292 /*
293 * Use srv->cli->desthost and srv->cli->share instead of
294 * server and share below to connect to the actual share,
295 * i.e., a normal share or a referred share from
296 * 'msdfs proxy' share.
297 */
298 if (srv->cli->cnum == (uint16) -1) {
299 /* Ensure we have accurate auth info */
300 SMBC_call_auth_fn(ctx, context,
301 srv->cli->desthost,
302 srv->cli->share,
303 pp_workgroup,
304 pp_username,
305 pp_password);
306
307 if (!*pp_workgroup || !*pp_username || !*pp_password) {
308 errno = ENOMEM;
309 cli_shutdown(srv->cli);
310 srv->cli = NULL;
311 smbc_getFunctionRemoveCachedServer(context)(context,
312 srv);
313 return NULL;
314 }
315
316 /*
317 * We don't need to renegotiate encryption
318 * here as the encryption context is not per
319 * tid.
320 */
321
322 status = cli_tcon_andx(srv->cli, srv->cli->share, "?????",
323 *pp_password,
324 strlen(*pp_password)+1);
325 if (!NT_STATUS_IS_OK(status)) {
326 errno = map_errno_from_nt_status(status);
327 cli_shutdown(srv->cli);
328 srv->cli = NULL;
329 smbc_getFunctionRemoveCachedServer(context)(context,
330 srv);
331 srv = NULL;
332 }
333
334 /* Determine if this share supports case sensitivity */
335 if (is_ipc) {
336 DEBUG(4,
337 ("IPC$ so ignore case sensitivity\n"));
338 } else if (!NT_STATUS_IS_OK(cli_get_fs_attr_info(c, &fs_attrs))) {
339 DEBUG(4, ("Could not retrieve "
340 "case sensitivity flag: %s.\n",
341 cli_errstr(c)));
342
343 /*
344 * We can't determine the case sensitivity of
345 * the share. We have no choice but to use the
346 * user-specified case sensitivity setting.
347 */
348 if (smbc_getOptionCaseSensitive(context)) {
349 cli_set_case_sensitive(c, True);
350 } else {
351 cli_set_case_sensitive(c, False);
352 }
353 } else {
354 DEBUG(4,
355 ("Case sensitive: %s\n",
356 (fs_attrs & FILE_CASE_SENSITIVE_SEARCH
357 ? "True"
358 : "False")));
359 cli_set_case_sensitive(
360 c,
361 (fs_attrs & FILE_CASE_SENSITIVE_SEARCH
362 ? True
363 : False));
364 }
365
366 /*
367 * Regenerate the dev value since it's based on both
368 * server and share
369 */
370 if (srv) {
371 srv->dev = (dev_t)(str_checksum(srv->cli->desthost) ^
372 str_checksum(srv->cli->share));
373 }
374 }
375 }
376
377 /* If we have a connection... */
378 if (srv) {
379
380 /* ... then we're done here. Give 'em what they came for. */
381 *in_cache = true;
382 goto done;
383 }
384
385 /* If we're not asked to connect when a connection doesn't exist... */
386 if (! connect_if_not_found) {
387 /* ... then we're done here. */
388 return NULL;
389 }
390
391 if (!*pp_workgroup || !*pp_username || !*pp_password) {
392 errno = ENOMEM;
393 return NULL;
394 }
395
396 make_nmb_name(&calling, smbc_getNetbiosName(context), 0x0);
397 make_nmb_name(&called , server, 0x20);
398
399 DEBUG(4,("SMBC_server: server_n=[%s] server=[%s]\n", server_n, server));
400
401 DEBUG(4,(" -> server_n=[%s] server=[%s]\n", server_n, server));
402
403again:
404
405 zero_sockaddr(&ss);
406
407 /* have to open a new connection */
408 if ((c = cli_initialise()) == NULL) {
409 errno = ENOMEM;
410 return NULL;
411 }
412
413 if (smbc_getOptionUseKerberos(context)) {
414 c->use_kerberos = True;
415 }
416
417 if (smbc_getOptionFallbackAfterKerberos(context)) {
418 c->fallback_after_kerberos = True;
419 }
420
421 if (smbc_getOptionUseCCache(context)) {
422 c->use_ccache = True;
423 }
424
425 c->timeout = smbc_getTimeout(context);
426
427 /*
428 * Force use of port 139 for first try if share is $IPC, empty, or
429 * null, so browse lists can work
430 */
431 if (share == NULL || *share == '\0' || is_ipc) {
432 port_try_first = 139;
433 port_try_next = 445;
434 } else {
435 port_try_first = 445;
436 port_try_next = 139;
437 }
438
439 c->port = port_try_first;
440
441 status = cli_connect(c, server_n, &ss);
442 if (!NT_STATUS_IS_OK(status)) {
443
444 /* First connection attempt failed. Try alternate port. */
445 c->port = port_try_next;
446
447 status = cli_connect(c, server_n, &ss);
448 if (!NT_STATUS_IS_OK(status)) {
449 cli_shutdown(c);
450 errno = ETIMEDOUT;
451 return NULL;
452 }
453 }
454
455 if (!cli_session_request(c, &calling, &called)) {
456 cli_shutdown(c);
457 if (strcmp(called.name, "*SMBSERVER")) {
458 make_nmb_name(&called , "*SMBSERVER", 0x20);
459 goto again;
460 } else { /* Try one more time, but ensure we don't loop */
461
462 /* Only try this if server is an IP address ... */
463
464 if (is_ipaddress(server) && !tried_reverse) {
465 fstring remote_name;
466 struct sockaddr_storage rem_ss;
467
468 if (!interpret_string_addr(&rem_ss, server,
469 NI_NUMERICHOST)) {
470 DEBUG(4, ("Could not convert IP address "
471 "%s to struct sockaddr_storage\n",
472 server));
473 errno = ETIMEDOUT;
474 return NULL;
475 }
476
477 tried_reverse++; /* Yuck */
478
479 if (name_status_find("*", 0, 0,
480 &rem_ss, remote_name)) {
481 make_nmb_name(&called,
482 remote_name,
483 0x20);
484 goto again;
485 }
486 }
487 }
488 errno = ETIMEDOUT;
489 return NULL;
490 }
491
492 DEBUG(4,(" session request ok\n"));
493
494 status = cli_negprot(c);
495
496 if (!NT_STATUS_IS_OK(status)) {
497 cli_shutdown(c);
498 errno = ETIMEDOUT;
499 return NULL;
500 }
501
502 username_used = *pp_username;
503
504 if (!NT_STATUS_IS_OK(cli_session_setup(c, username_used,
505 *pp_password,
506 strlen(*pp_password),
507 *pp_password,
508 strlen(*pp_password),
509 *pp_workgroup))) {
510
511 /* Failed. Try an anonymous login, if allowed by flags. */
512 username_used = "";
513
514 if (smbc_getOptionNoAutoAnonymousLogin(context) ||
515 !NT_STATUS_IS_OK(cli_session_setup(c, username_used,
516 *pp_password, 1,
517 *pp_password, 0,
518 *pp_workgroup))) {
519
520 cli_shutdown(c);
521 errno = EPERM;
522 return NULL;
523 }
524 }
525
526 status = cli_init_creds(c, username_used,
527 *pp_workgroup, *pp_password);
528 if (!NT_STATUS_IS_OK(status)) {
529 errno = map_errno_from_nt_status(status);
530 cli_shutdown(c);
531 return NULL;
532 }
533
534 DEBUG(4,(" session setup ok\n"));
535
536 /* here's the fun part....to support 'msdfs proxy' shares
537 (on Samba or windows) we have to issues a TRANS_GET_DFS_REFERRAL
538 here before trying to connect to the original share.
539 cli_check_msdfs_proxy() will fail if it is a normal share. */
540
541 if ((c->capabilities & CAP_DFS) &&
542 cli_check_msdfs_proxy(ctx, c, share,
543 &newserver, &newshare,
544 /* FIXME: cli_check_msdfs_proxy() does
545 not support smbc_smb_encrypt_level type */
546 context->internal->smb_encryption_level ?
547 true : false,
548 *pp_username,
549 *pp_password,
550 *pp_workgroup)) {
551 cli_shutdown(c);
552 srv = SMBC_server_internal(ctx, context, connect_if_not_found,
553 newserver, newshare, pp_workgroup,
554 pp_username, pp_password, in_cache);
555 TALLOC_FREE(newserver);
556 TALLOC_FREE(newshare);
557 return srv;
558 }
559
560 /* must be a normal share */
561
562 status = cli_tcon_andx(c, share, "?????", *pp_password,
563 strlen(*pp_password)+1);
564 if (!NT_STATUS_IS_OK(status)) {
565 errno = map_errno_from_nt_status(status);
566 cli_shutdown(c);
567 return NULL;
568 }
569
570 DEBUG(4,(" tconx ok\n"));
571
572 /* Determine if this share supports case sensitivity */
573 if (is_ipc) {
574 DEBUG(4, ("IPC$ so ignore case sensitivity\n"));
575 } else if (!NT_STATUS_IS_OK(cli_get_fs_attr_info(c, &fs_attrs))) {
576 DEBUG(4, ("Could not retrieve case sensitivity flag: %s.\n",
577 cli_errstr(c)));
578
579 /*
580 * We can't determine the case sensitivity of the share. We
581 * have no choice but to use the user-specified case
582 * sensitivity setting.
583 */
584 if (smbc_getOptionCaseSensitive(context)) {
585 cli_set_case_sensitive(c, True);
586 } else {
587 cli_set_case_sensitive(c, False);
588 }
589 } else {
590 DEBUG(4, ("Case sensitive: %s\n",
591 (fs_attrs & FILE_CASE_SENSITIVE_SEARCH
592 ? "True"
593 : "False")));
594 cli_set_case_sensitive(c,
595 (fs_attrs & FILE_CASE_SENSITIVE_SEARCH
596 ? True
597 : False));
598 }
599
600 if (context->internal->smb_encryption_level) {
601 /* Attempt UNIX smb encryption. */
602 if (!NT_STATUS_IS_OK(cli_force_encryption(c,
603 username_used,
604 *pp_password,
605 *pp_workgroup))) {
606
607 /*
608 * context->smb_encryption_level == 1
609 * means don't fail if encryption can't be negotiated,
610 * == 2 means fail if encryption can't be negotiated.
611 */
612
613 DEBUG(4,(" SMB encrypt failed\n"));
614
615 if (context->internal->smb_encryption_level == 2) {
616 cli_shutdown(c);
617 errno = EPERM;
618 return NULL;
619 }
620 }
621 DEBUG(4,(" SMB encrypt ok\n"));
622 }
623
624 /*
625 * Ok, we have got a nice connection
626 * Let's allocate a server structure.
627 */
628
629 srv = SMB_MALLOC_P(SMBCSRV);
630 if (!srv) {
631 cli_shutdown(c);
632 errno = ENOMEM;
633 return NULL;
634 }
635
636 ZERO_STRUCTP(srv);
637 srv->cli = c;
638 srv->dev = (dev_t)(str_checksum(server) ^ str_checksum(share));
639 srv->no_pathinfo = False;
640 srv->no_pathinfo2 = False;
641 srv->no_nt_session = False;
642
643done:
644 if (!pp_workgroup || !*pp_workgroup || !**pp_workgroup) {
645 workgroup = talloc_strdup(ctx, smbc_getWorkgroup(context));
646 } else {
647 workgroup = *pp_workgroup;
648 }
649 if(!workgroup) {
650 return NULL;
651 }
652
653 /* set the credentials to make DFS work */
654 smbc_set_credentials_with_fallback(context,
655 workgroup,
656 *pp_username,
657 *pp_password);
658
659 return srv;
660}
661
662SMBCSRV *
663SMBC_server(TALLOC_CTX *ctx,
664 SMBCCTX *context,
665 bool connect_if_not_found,
666 const char *server,
667 const char *share,
668 char **pp_workgroup,
669 char **pp_username,
670 char **pp_password)
671{
672 SMBCSRV *srv=NULL;
673 bool in_cache = false;
674
675 srv = SMBC_server_internal(ctx, context, connect_if_not_found,
676 server, share, pp_workgroup,
677 pp_username, pp_password, &in_cache);
678
679 if (!srv) {
680 return NULL;
681 }
682 if (in_cache) {
683 return srv;
684 }
685
686 /* Now add it to the cache (internal or external) */
687 /* Let the cache function set errno if it wants to */
688 errno = 0;
689 if (smbc_getFunctionAddCachedServer(context)(context, srv,
690 server, share,
691 *pp_workgroup,
692 *pp_username)) {
693 int saved_errno = errno;
694 DEBUG(3, (" Failed to add server to cache\n"));
695 errno = saved_errno;
696 if (errno == 0) {
697 errno = ENOMEM;
698 }
699 SAFE_FREE(srv);
700 return NULL;
701 }
702
703 DEBUG(2, ("Server connect ok: //%s/%s: %p\n",
704 server, share, srv));
705
706 DLIST_ADD(context->internal->servers, srv);
707 return srv;
708}
709
710/*
711 * Connect to a server for getting/setting attributes, possibly on an existing
712 * connection. This works similarly to SMBC_server().
713 */
714SMBCSRV *
715SMBC_attr_server(TALLOC_CTX *ctx,
716 SMBCCTX *context,
717 const char *server,
718 const char *share,
719 char **pp_workgroup,
720 char **pp_username,
721 char **pp_password)
722{
723 int flags;
724 struct sockaddr_storage ss;
725 struct cli_state *ipc_cli = NULL;
726 struct rpc_pipe_client *pipe_hnd = NULL;
727 NTSTATUS nt_status;
728 SMBCSRV *srv=NULL;
729 SMBCSRV *ipc_srv=NULL;
730
731 /*
732 * Use srv->cli->desthost and srv->cli->share instead of
733 * server and share below to connect to the actual share,
734 * i.e., a normal share or a referred share from
735 * 'msdfs proxy' share.
736 */
737 srv = SMBC_server(ctx, context, true, server, share,
738 pp_workgroup, pp_username, pp_password);
739 if (!srv) {
740 return NULL;
741 }
742 server = srv->cli->desthost;
743 share = srv->cli->share;
744
745 /*
746 * See if we've already created this special connection. Reference
747 * our "special" share name '*IPC$', which is an impossible real share
748 * name due to the leading asterisk.
749 */
750 ipc_srv = SMBC_find_server(ctx, context, server, "*IPC$",
751 pp_workgroup, pp_username, pp_password);
752 if (!ipc_srv) {
753
754 /* We didn't find a cached connection. Get the password */
755 if (!*pp_password || (*pp_password)[0] == '\0') {
756 /* ... then retrieve it now. */
757 SMBC_call_auth_fn(ctx, context, server, share,
758 pp_workgroup,
759 pp_username,
760 pp_password);
761 if (!*pp_workgroup || !*pp_username || !*pp_password) {
762 errno = ENOMEM;
763 return NULL;
764 }
765 }
766
767 flags = 0;
768 if (smbc_getOptionUseKerberos(context)) {
769 flags |= CLI_FULL_CONNECTION_USE_KERBEROS;
770 }
771 if (smbc_getOptionUseCCache(context)) {
772 flags |= CLI_FULL_CONNECTION_USE_CCACHE;
773 }
774
775 zero_sockaddr(&ss);
776 nt_status = cli_full_connection(&ipc_cli,
777 global_myname(), server,
778 &ss, 0, "IPC$", "?????",
779 *pp_username,
780 *pp_workgroup,
781 *pp_password,
782 flags,
783 Undefined);
784 if (! NT_STATUS_IS_OK(nt_status)) {
785 DEBUG(1,("cli_full_connection failed! (%s)\n",
786 nt_errstr(nt_status)));
787 errno = ENOTSUP;
788 return NULL;
789 }
790
791 if (context->internal->smb_encryption_level) {
792 /* Attempt UNIX smb encryption. */
793 if (!NT_STATUS_IS_OK(cli_force_encryption(ipc_cli,
794 *pp_username,
795 *pp_password,
796 *pp_workgroup))) {
797
798 /*
799 * context->smb_encryption_level ==
800 * 1 means don't fail if encryption can't be
801 * negotiated, == 2 means fail if encryption
802 * can't be negotiated.
803 */
804
805 DEBUG(4,(" SMB encrypt failed on IPC$\n"));
806
807 if (context->internal->smb_encryption_level == 2) {
808 cli_shutdown(ipc_cli);
809 errno = EPERM;
810 return NULL;
811 }
812 }
813 DEBUG(4,(" SMB encrypt ok on IPC$\n"));
814 }
815
816 ipc_srv = SMB_MALLOC_P(SMBCSRV);
817 if (!ipc_srv) {
818 errno = ENOMEM;
819 cli_shutdown(ipc_cli);
820 return NULL;
821 }
822
823 ZERO_STRUCTP(ipc_srv);
824 ipc_srv->cli = ipc_cli;
825
826 nt_status = cli_rpc_pipe_open_noauth(
827 ipc_srv->cli, &ndr_table_lsarpc.syntax_id, &pipe_hnd);
828 if (!NT_STATUS_IS_OK(nt_status)) {
829 DEBUG(1, ("cli_nt_session_open fail!\n"));
830 errno = ENOTSUP;
831 cli_shutdown(ipc_srv->cli);
832 free(ipc_srv);
833 return NULL;
834 }
835
836 /*
837 * Some systems don't support
838 * SEC_FLAG_MAXIMUM_ALLOWED, but NT sends 0x2000000
839 * so we might as well do it too.
840 */
841
842 nt_status = rpccli_lsa_open_policy(
843 pipe_hnd,
844 talloc_tos(),
845 True,
846 GENERIC_EXECUTE_ACCESS,
847 &ipc_srv->pol);
848
849 if (!NT_STATUS_IS_OK(nt_status)) {
850 errno = SMBC_errno(context, ipc_srv->cli);
851 cli_shutdown(ipc_srv->cli);
852 return NULL;
853 }
854
855 /* now add it to the cache (internal or external) */
856
857 errno = 0; /* let cache function set errno if it likes */
858 if (smbc_getFunctionAddCachedServer(context)(context, ipc_srv,
859 server,
860 "*IPC$",
861 *pp_workgroup,
862 *pp_username)) {
863 DEBUG(3, (" Failed to add server to cache\n"));
864 if (errno == 0) {
865 errno = ENOMEM;
866 }
867 cli_shutdown(ipc_srv->cli);
868 free(ipc_srv);
869 return NULL;
870 }
871
872 DLIST_ADD(context->internal->servers, ipc_srv);
873 }
874
875 return ipc_srv;
876}
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