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
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>.
26 #include "libsmbclient.h"
27 #include "libsmb_internal.h"
31 * Check a server for being alive and well.
32 * returns 0 if the server is in shape. Returns 1 on error
34 * Also useable outside libsmbclient to enable external cache
35 * to do some checks too.
38 SMBC_check_server(SMBCCTX
* context
,
45 return (getpeername(server
->cli
->fd
, &addr
, &size
) == -1);
49 * Remove a server from the cached server list it's unused.
50 * On success, 0 is returned. 1 is returned if the server could not be removed.
52 * Also useable outside libsmbclient
55 SMBC_remove_unused_server(SMBCCTX
* context
,
60 /* are we being fooled ? */
61 if (!context
|| !context
->internal
->initialized
|| !srv
) {
65 /* Check all open files/directories for a relation with this server */
66 for (file
= context
->internal
->files
; file
; file
= file
->next
) {
67 if (file
->srv
== srv
) {
69 DEBUG(3, ("smbc_remove_usused_server: "
70 "%p still used by %p.\n",
76 DLIST_REMOVE(context
->internal
->servers
, srv
);
78 cli_shutdown(srv
->cli
);
81 DEBUG(3, ("smbc_remove_usused_server: %p removed.\n", srv
));
83 smbc_getFunctionRemoveCachedServer(context
)(context
, srv
);
89 /****************************************************************
90 * Call the auth_fn with fixed size (fstring) buffers.
91 ***************************************************************/
93 SMBC_call_auth_fn(TALLOC_CTX
*ctx
,
104 smbc_get_auth_data_with_context_fn auth_with_context_fn
;
106 strlcpy(workgroup
, *pp_workgroup
, sizeof(workgroup
));
107 strlcpy(username
, *pp_username
, sizeof(username
));
108 strlcpy(password
, *pp_password
, sizeof(password
));
110 /* See if there's an authentication with context function provided */
111 auth_with_context_fn
= smbc_getFunctionAuthDataWithContext(context
);
112 if (auth_with_context_fn
)
114 (* auth_with_context_fn
)(context
,
116 workgroup
, sizeof(workgroup
),
117 username
, sizeof(username
),
118 password
, sizeof(password
));
122 smbc_getFunctionAuthData(context
)(server
, share
,
123 workgroup
, sizeof(workgroup
),
124 username
, sizeof(username
),
125 password
, sizeof(password
));
128 TALLOC_FREE(*pp_workgroup
);
129 TALLOC_FREE(*pp_username
);
130 TALLOC_FREE(*pp_password
);
132 *pp_workgroup
= talloc_strdup(ctx
, workgroup
);
133 *pp_username
= talloc_strdup(ctx
, username
);
134 *pp_password
= talloc_strdup(ctx
, password
);
139 SMBC_get_auth_data(const char *server
, const char *share
,
140 char *workgroup_buf
, int workgroup_buf_len
,
141 char *username_buf
, int username_buf_len
,
142 char *password_buf
, int password_buf_len
)
144 /* Default function just uses provided data. Nothing to do. */
150 SMBC_find_server(TALLOC_CTX
*ctx
,
161 if (!pp_workgroup
|| !pp_username
|| !pp_password
) {
167 srv
= smbc_getFunctionGetCachedServer(context
)(context
,
172 if (!auth_called
&& !srv
&& (!*pp_username
|| !(*pp_username
)[0] ||
173 !*pp_password
|| !(*pp_password
)[0])) {
174 SMBC_call_auth_fn(ctx
, context
, server
, share
,
175 pp_workgroup
, pp_username
, pp_password
);
178 * However, smbc_auth_fn may have picked up info relating to
179 * an existing connection, so try for an existing connection
183 goto check_server_cache
;
188 if (smbc_getFunctionCheckServer(context
)(context
, srv
)) {
190 * This server is no good anymore
191 * Try to remove it and check for more possible
192 * servers in the cache
194 if (smbc_getFunctionRemoveUnusedServer(context
)(context
,
197 * We could not remove the server completely,
198 * remove it from the cache so we will not get
199 * it again. It will be removed when the last
200 * file/dir is closed.
202 smbc_getFunctionRemoveCachedServer(context
)(context
,
207 * Maybe there are more cached connections to this
210 goto check_server_cache
;
220 * Connect to a server, possibly on an existing connection
222 * Here, what we want to do is: If the server and username
223 * match an existing connection, reuse that, otherwise, establish a
226 * If we have to create a new connection, call the auth_fn to get the
227 * info we need, unless the username and password were passed in.
231 SMBC_server(TALLOC_CTX
*ctx
,
233 bool connect_if_not_found
,
241 char *workgroup
= NULL
;
243 struct nmb_name called
, calling
;
244 const char *server_n
= server
;
245 struct sockaddr_storage ss
;
246 int tried_reverse
= 0;
249 int is_ipc
= (share
!= NULL
&& strcmp(share
, "IPC$") == 0);
251 const char *username_used
;
257 if (server
[0] == 0) {
262 /* Look for a cached connection */
263 srv
= SMBC_find_server(ctx
, context
, server
, share
,
264 pp_workgroup
, pp_username
, pp_password
);
267 * If we found a connection and we're only allowed one share per
272 smbc_getOptionOneSharePerServer(context
)) {
275 * ... then if there's no current connection to the share,
276 * connect to it. SMBC_find_server(), or rather the function
277 * pointed to by context->get_cached_srv_fn which
278 * was called by SMBC_find_server(), will have issued a tree
279 * disconnect if the requested share is not the same as the
280 * one that was already connected.
282 if (srv
->cli
->cnum
== (uint16
) -1) {
283 /* Ensure we have accurate auth info */
284 SMBC_call_auth_fn(ctx
, context
, server
, share
,
289 if (!*pp_workgroup
|| !*pp_username
|| !*pp_password
) {
291 cli_shutdown(srv
->cli
);
293 smbc_getFunctionRemoveCachedServer(context
)(context
,
299 * We don't need to renegotiate encryption
300 * here as the encryption context is not per
304 status
= cli_tcon_andx(srv
->cli
, share
, "?????",
306 strlen(*pp_password
)+1);
307 if (!NT_STATUS_IS_OK(status
)) {
308 errno
= map_errno_from_nt_status(status
);
309 cli_shutdown(srv
->cli
);
311 smbc_getFunctionRemoveCachedServer(context
)(context
,
316 /* Determine if this share supports case sensitivity */
319 ("IPC$ so ignore case sensitivity\n"));
320 } else if (!cli_get_fs_attr_info(c
, &fs_attrs
)) {
321 DEBUG(4, ("Could not retrieve "
322 "case sensitivity flag: %s.\n",
326 * We can't determine the case sensitivity of
327 * the share. We have no choice but to use the
328 * user-specified case sensitivity setting.
330 if (smbc_getOptionCaseSensitive(context
)) {
331 cli_set_case_sensitive(c
, True
);
333 cli_set_case_sensitive(c
, False
);
337 ("Case sensitive: %s\n",
338 (fs_attrs
& FILE_CASE_SENSITIVE_SEARCH
341 cli_set_case_sensitive(
343 (fs_attrs
& FILE_CASE_SENSITIVE_SEARCH
349 * Regenerate the dev value since it's based on both
353 srv
->dev
= (dev_t
)(str_checksum(server
) ^
354 str_checksum(share
));
359 /* If we have a connection... */
362 /* ... then we're done here. Give 'em what they came for. */
366 /* If we're not asked to connect when a connection doesn't exist... */
367 if (! connect_if_not_found
) {
368 /* ... then we're done here. */
372 if (!*pp_workgroup
|| !*pp_username
|| !*pp_password
) {
377 make_nmb_name(&calling
, smbc_getNetbiosName(context
), 0x0);
378 make_nmb_name(&called
, server
, 0x20);
380 DEBUG(4,("SMBC_server: server_n=[%s] server=[%s]\n", server_n
, server
));
382 DEBUG(4,(" -> server_n=[%s] server=[%s]\n", server_n
, server
));
388 /* have to open a new connection */
389 if ((c
= cli_initialise()) == NULL
) {
394 if (smbc_getOptionUseKerberos(context
)) {
395 c
->use_kerberos
= True
;
398 if (smbc_getOptionFallbackAfterKerberos(context
)) {
399 c
->fallback_after_kerberos
= True
;
402 c
->timeout
= smbc_getTimeout(context
);
405 * Force use of port 139 for first try if share is $IPC, empty, or
406 * null, so browse lists can work
408 if (share
== NULL
|| *share
== '\0' || is_ipc
) {
409 port_try_first
= 139;
412 port_try_first
= 445;
416 c
->port
= port_try_first
;
418 status
= cli_connect(c
, server_n
, &ss
);
419 if (!NT_STATUS_IS_OK(status
)) {
421 /* First connection attempt failed. Try alternate port. */
422 c
->port
= port_try_next
;
424 status
= cli_connect(c
, server_n
, &ss
);
425 if (!NT_STATUS_IS_OK(status
)) {
432 if (!cli_session_request(c
, &calling
, &called
)) {
434 if (strcmp(called
.name
, "*SMBSERVER")) {
435 make_nmb_name(&called
, "*SMBSERVER", 0x20);
437 } else { /* Try one more time, but ensure we don't loop */
439 /* Only try this if server is an IP address ... */
441 if (is_ipaddress(server
) && !tried_reverse
) {
443 struct sockaddr_storage rem_ss
;
445 if (!interpret_string_addr(&rem_ss
, server
,
447 DEBUG(4, ("Could not convert IP address "
448 "%s to struct sockaddr_storage\n",
454 tried_reverse
++; /* Yuck */
456 if (name_status_find("*", 0, 0,
457 &rem_ss
, remote_name
)) {
458 make_nmb_name(&called
,
469 DEBUG(4,(" session request ok\n"));
471 status
= cli_negprot(c
);
473 if (!NT_STATUS_IS_OK(status
)) {
479 username_used
= *pp_username
;
481 if (!NT_STATUS_IS_OK(cli_session_setup(c
, username_used
,
483 strlen(*pp_password
),
485 strlen(*pp_password
),
488 /* Failed. Try an anonymous login, if allowed by flags. */
491 if (smbc_getOptionNoAutoAnonymousLogin(context
) ||
492 !NT_STATUS_IS_OK(cli_session_setup(c
, username_used
,
503 DEBUG(4,(" session setup ok\n"));
505 status
= cli_tcon_andx(c
, share
, "?????", *pp_password
,
506 strlen(*pp_password
)+1);
507 if (!NT_STATUS_IS_OK(status
)) {
508 errno
= map_errno_from_nt_status(status
);
513 DEBUG(4,(" tconx ok\n"));
515 /* Determine if this share supports case sensitivity */
517 DEBUG(4, ("IPC$ so ignore case sensitivity\n"));
518 } else if (!cli_get_fs_attr_info(c
, &fs_attrs
)) {
519 DEBUG(4, ("Could not retrieve case sensitivity flag: %s.\n",
523 * We can't determine the case sensitivity of the share. We
524 * have no choice but to use the user-specified case
525 * sensitivity setting.
527 if (smbc_getOptionCaseSensitive(context
)) {
528 cli_set_case_sensitive(c
, True
);
530 cli_set_case_sensitive(c
, False
);
533 DEBUG(4, ("Case sensitive: %s\n",
534 (fs_attrs
& FILE_CASE_SENSITIVE_SEARCH
537 cli_set_case_sensitive(c
,
538 (fs_attrs
& FILE_CASE_SENSITIVE_SEARCH
543 if (context
->internal
->smb_encryption_level
) {
544 /* Attempt UNIX smb encryption. */
545 if (!NT_STATUS_IS_OK(cli_force_encryption(c
,
551 * context->smb_encryption_level == 1
552 * means don't fail if encryption can't be negotiated,
553 * == 2 means fail if encryption can't be negotiated.
556 DEBUG(4,(" SMB encrypt failed\n"));
558 if (context
->internal
->smb_encryption_level
== 2) {
564 DEBUG(4,(" SMB encrypt ok\n"));
568 * Ok, we have got a nice connection
569 * Let's allocate a server structure.
572 srv
= SMB_MALLOC_P(SMBCSRV
);
580 srv
->dev
= (dev_t
)(str_checksum(server
) ^ str_checksum(share
));
581 srv
->no_pathinfo
= False
;
582 srv
->no_pathinfo2
= False
;
583 srv
->no_nt_session
= False
;
585 /* now add it to the cache (internal or external) */
586 /* Let the cache function set errno if it wants to */
588 if (smbc_getFunctionAddCachedServer(context
)(context
, srv
,
592 int saved_errno
= errno
;
593 DEBUG(3, (" Failed to add server to cache\n"));
601 DEBUG(2, ("Server connect ok: //%s/%s: %p\n",
602 server
, share
, srv
));
604 DLIST_ADD(context
->internal
->servers
, srv
);
606 if (!pp_workgroup
|| !*pp_workgroup
|| !**pp_workgroup
) {
607 workgroup
= talloc_strdup(ctx
, smbc_getWorkgroup(context
));
609 workgroup
= *pp_workgroup
;
615 /* set the credentials to make DFS work */
616 smbc_set_credentials_with_fallback(context
,
634 * Connect to a server for getting/setting attributes, possibly on an existing
635 * connection. This works similarly to SMBC_server().
638 SMBC_attr_server(TALLOC_CTX
*ctx
,
647 struct sockaddr_storage ss
;
648 struct cli_state
*ipc_cli
;
649 struct rpc_pipe_client
*pipe_hnd
;
651 SMBCSRV
*ipc_srv
=NULL
;
654 * See if we've already created this special connection. Reference
655 * our "special" share name '*IPC$', which is an impossible real share
656 * name due to the leading asterisk.
658 ipc_srv
= SMBC_find_server(ctx
, context
, server
, "*IPC$",
659 pp_workgroup
, pp_username
, pp_password
);
662 /* We didn't find a cached connection. Get the password */
663 if (!*pp_password
|| (*pp_password
)[0] == '\0') {
664 /* ... then retrieve it now. */
665 SMBC_call_auth_fn(ctx
, context
, server
, share
,
669 if (!*pp_workgroup
|| !*pp_username
|| !*pp_password
) {
676 if (smbc_getOptionUseKerberos(context
)) {
677 flags
|= CLI_FULL_CONNECTION_USE_KERBEROS
;
681 nt_status
= cli_full_connection(&ipc_cli
,
682 global_myname(), server
,
683 &ss
, 0, "IPC$", "?????",
689 if (! NT_STATUS_IS_OK(nt_status
)) {
690 DEBUG(1,("cli_full_connection failed! (%s)\n",
691 nt_errstr(nt_status
)));
696 if (context
->internal
->smb_encryption_level
) {
697 /* Attempt UNIX smb encryption. */
698 if (!NT_STATUS_IS_OK(cli_force_encryption(ipc_cli
,
704 * context->smb_encryption_level ==
705 * 1 means don't fail if encryption can't be
706 * negotiated, == 2 means fail if encryption
707 * can't be negotiated.
710 DEBUG(4,(" SMB encrypt failed on IPC$\n"));
712 if (context
->internal
->smb_encryption_level
== 2) {
713 cli_shutdown(ipc_cli
);
718 DEBUG(4,(" SMB encrypt ok on IPC$\n"));
721 ipc_srv
= SMB_MALLOC_P(SMBCSRV
);
724 cli_shutdown(ipc_cli
);
728 ZERO_STRUCTP(ipc_srv
);
729 ipc_srv
->cli
= ipc_cli
;
731 nt_status
= cli_rpc_pipe_open_noauth(
732 ipc_srv
->cli
, &ndr_table_lsarpc
.syntax_id
, &pipe_hnd
);
733 if (!NT_STATUS_IS_OK(nt_status
)) {
734 DEBUG(1, ("cli_nt_session_open fail!\n"));
736 cli_shutdown(ipc_srv
->cli
);
742 * Some systems don't support
743 * SEC_FLAG_MAXIMUM_ALLOWED, but NT sends 0x2000000
744 * so we might as well do it too.
747 nt_status
= rpccli_lsa_open_policy(
751 GENERIC_EXECUTE_ACCESS
,
754 if (!NT_STATUS_IS_OK(nt_status
)) {
755 errno
= SMBC_errno(context
, ipc_srv
->cli
);
756 cli_shutdown(ipc_srv
->cli
);
760 /* now add it to the cache (internal or external) */
762 errno
= 0; /* let cache function set errno if it likes */
763 if (smbc_getFunctionAddCachedServer(context
)(context
, ipc_srv
,
768 DEBUG(3, (" Failed to add server to cache\n"));
772 cli_shutdown(ipc_srv
->cli
);
777 DLIST_ADD(context
->internal
->servers
, ipc_srv
);