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
,
242 struct nmb_name called
, calling
;
243 const char *server_n
= server
;
244 struct sockaddr_storage ss
;
245 int tried_reverse
= 0;
248 const char *username_used
;
254 if (server
[0] == 0) {
259 /* Look for a cached connection */
260 srv
= SMBC_find_server(ctx
, context
, server
, share
,
261 pp_workgroup
, pp_username
, pp_password
);
264 * If we found a connection and we're only allowed one share per
269 smbc_getOptionOneSharePerServer(context
)) {
272 * ... then if there's no current connection to the share,
273 * connect to it. SMBC_find_server(), or rather the function
274 * pointed to by context->get_cached_srv_fn which
275 * was called by SMBC_find_server(), will have issued a tree
276 * disconnect if the requested share is not the same as the
277 * one that was already connected.
279 if (srv
->cli
->cnum
== (uint16
) -1) {
280 /* Ensure we have accurate auth info */
281 SMBC_call_auth_fn(ctx
, context
, server
, share
,
286 if (!*pp_workgroup
|| !*pp_username
|| !*pp_password
) {
288 cli_shutdown(srv
->cli
);
290 smbc_getFunctionRemoveCachedServer(context
)(context
,
296 * We don't need to renegotiate encryption
297 * here as the encryption context is not per
301 if (!cli_send_tconX(srv
->cli
, share
, "?????",
303 strlen(*pp_password
)+1)) {
305 errno
= SMBC_errno(context
, srv
->cli
);
306 cli_shutdown(srv
->cli
);
308 smbc_getFunctionRemoveCachedServer(context
)(context
,
314 * Regenerate the dev value since it's based on both
318 srv
->dev
= (dev_t
)(str_checksum(server
) ^
319 str_checksum(share
));
324 /* If we have a connection... */
327 /* ... then we're done here. Give 'em what they came for. */
331 /* If we're not asked to connect when a connection doesn't exist... */
332 if (! connect_if_not_found
) {
333 /* ... then we're done here. */
337 if (!*pp_workgroup
|| !*pp_username
|| !*pp_password
) {
342 make_nmb_name(&calling
, smbc_getNetbiosName(context
), 0x0);
343 make_nmb_name(&called
, server
, 0x20);
345 DEBUG(4,("SMBC_server: server_n=[%s] server=[%s]\n", server_n
, server
));
347 DEBUG(4,(" -> server_n=[%s] server=[%s]\n", server_n
, server
));
353 /* have to open a new connection */
354 if ((c
= cli_initialise()) == NULL
) {
359 /* POSIX-like - always request case-sensitivity by default. */
360 if (smbc_getOptionCaseSensitive(context
)) {
361 cli_set_case_sensitive(c
, True
);
363 cli_set_case_sensitive(c
, False
);
366 if (smbc_getOptionUseKerberos(context
)) {
367 c
->use_kerberos
= True
;
370 if (smbc_getOptionFallbackAfterKerberos(context
)) {
371 c
->fallback_after_kerberos
= True
;
374 c
->timeout
= smbc_getTimeout(context
);
377 * Force use of port 139 for first try if share is $IPC, empty, or
378 * null, so browse lists can work
380 if (share
== NULL
|| *share
== '\0' || strcmp(share
, "IPC$") == 0) {
381 port_try_first
= 139;
384 port_try_first
= 445;
388 c
->port
= port_try_first
;
390 status
= cli_connect(c
, server_n
, &ss
);
391 if (!NT_STATUS_IS_OK(status
)) {
393 /* First connection attempt failed. Try alternate port. */
394 c
->port
= port_try_next
;
396 status
= cli_connect(c
, server_n
, &ss
);
397 if (!NT_STATUS_IS_OK(status
)) {
404 if (!cli_session_request(c
, &calling
, &called
)) {
406 if (strcmp(called
.name
, "*SMBSERVER")) {
407 make_nmb_name(&called
, "*SMBSERVER", 0x20);
409 } else { /* Try one more time, but ensure we don't loop */
411 /* Only try this if server is an IP address ... */
413 if (is_ipaddress(server
) && !tried_reverse
) {
415 struct sockaddr_storage rem_ss
;
417 if (!interpret_string_addr(&rem_ss
, server
,
419 DEBUG(4, ("Could not convert IP address "
420 "%s to struct sockaddr_storage\n",
426 tried_reverse
++; /* Yuck */
428 if (name_status_find("*", 0, 0,
429 &rem_ss
, remote_name
)) {
430 make_nmb_name(&called
,
441 DEBUG(4,(" session request ok\n"));
443 if (!cli_negprot(c
)) {
449 username_used
= *pp_username
;
451 if (!NT_STATUS_IS_OK(cli_session_setup(c
, username_used
,
453 strlen(*pp_password
),
455 strlen(*pp_password
),
458 /* Failed. Try an anonymous login, if allowed by flags. */
461 if (smbc_getOptionNoAutoAnonymousLogin(context
) ||
462 !NT_STATUS_IS_OK(cli_session_setup(c
, username_used
,
473 DEBUG(4,(" session setup ok\n"));
475 if (!cli_send_tconX(c
, share
, "?????",
476 *pp_password
, strlen(*pp_password
)+1)) {
477 errno
= SMBC_errno(context
, c
);
482 DEBUG(4,(" tconx ok\n"));
484 if (context
->internal
->smb_encryption_level
) {
485 /* Attempt UNIX smb encryption. */
486 if (!NT_STATUS_IS_OK(cli_force_encryption(c
,
492 * context->smb_encryption_level == 1
493 * means don't fail if encryption can't be negotiated,
494 * == 2 means fail if encryption can't be negotiated.
497 DEBUG(4,(" SMB encrypt failed\n"));
499 if (context
->internal
->smb_encryption_level
== 2) {
505 DEBUG(4,(" SMB encrypt ok\n"));
509 * Ok, we have got a nice connection
510 * Let's allocate a server structure.
513 srv
= SMB_MALLOC_P(SMBCSRV
);
521 srv
->dev
= (dev_t
)(str_checksum(server
) ^ str_checksum(share
));
522 srv
->no_pathinfo
= False
;
523 srv
->no_pathinfo2
= False
;
524 srv
->no_nt_session
= False
;
526 /* now add it to the cache (internal or external) */
527 /* Let the cache function set errno if it wants to */
529 if (smbc_getFunctionAddCachedServer(context
)(context
, srv
,
533 int saved_errno
= errno
;
534 DEBUG(3, (" Failed to add server to cache\n"));
542 DEBUG(2, ("Server connect ok: //%s/%s: %p\n",
543 server
, share
, srv
));
545 DLIST_ADD(context
->internal
->servers
, srv
);
559 * Connect to a server for getting/setting attributes, possibly on an existing
560 * connection. This works similarly to SMBC_server().
563 SMBC_attr_server(TALLOC_CTX
*ctx
,
572 struct sockaddr_storage ss
;
573 struct cli_state
*ipc_cli
;
574 struct rpc_pipe_client
*pipe_hnd
;
576 SMBCSRV
*ipc_srv
=NULL
;
579 * See if we've already created this special connection. Reference
580 * our "special" share name '*IPC$', which is an impossible real share
581 * name due to the leading asterisk.
583 ipc_srv
= SMBC_find_server(ctx
, context
, server
, "*IPC$",
584 pp_workgroup
, pp_username
, pp_password
);
587 /* We didn't find a cached connection. Get the password */
588 if (!*pp_password
|| (*pp_password
)[0] == '\0') {
589 /* ... then retrieve it now. */
590 SMBC_call_auth_fn(ctx
, context
, server
, share
,
594 if (!*pp_workgroup
|| !*pp_username
|| !*pp_password
) {
601 if (smbc_getOptionUseKerberos(context
)) {
602 flags
|= CLI_FULL_CONNECTION_USE_KERBEROS
;
606 nt_status
= cli_full_connection(&ipc_cli
,
607 global_myname(), server
,
608 &ss
, 0, "IPC$", "?????",
614 if (! NT_STATUS_IS_OK(nt_status
)) {
615 DEBUG(1,("cli_full_connection failed! (%s)\n",
616 nt_errstr(nt_status
)));
621 if (context
->internal
->smb_encryption_level
) {
622 /* Attempt UNIX smb encryption. */
623 if (!NT_STATUS_IS_OK(cli_force_encryption(ipc_cli
,
629 * context->smb_encryption_level ==
630 * 1 means don't fail if encryption can't be
631 * negotiated, == 2 means fail if encryption
632 * can't be negotiated.
635 DEBUG(4,(" SMB encrypt failed on IPC$\n"));
637 if (context
->internal
->smb_encryption_level
== 2) {
638 cli_shutdown(ipc_cli
);
643 DEBUG(4,(" SMB encrypt ok on IPC$\n"));
646 ipc_srv
= SMB_MALLOC_P(SMBCSRV
);
649 cli_shutdown(ipc_cli
);
653 ZERO_STRUCTP(ipc_srv
);
654 ipc_srv
->cli
= ipc_cli
;
656 nt_status
= cli_rpc_pipe_open_noauth(
657 ipc_srv
->cli
, &ndr_table_lsarpc
.syntax_id
, &pipe_hnd
);
658 if (!NT_STATUS_IS_OK(nt_status
)) {
659 DEBUG(1, ("cli_nt_session_open fail!\n"));
661 cli_shutdown(ipc_srv
->cli
);
667 * Some systems don't support
668 * SEC_RIGHTS_MAXIMUM_ALLOWED, but NT sends 0x2000000
669 * so we might as well do it too.
672 nt_status
= rpccli_lsa_open_policy(
676 GENERIC_EXECUTE_ACCESS
,
679 if (!NT_STATUS_IS_OK(nt_status
)) {
680 errno
= SMBC_errno(context
, ipc_srv
->cli
);
681 cli_shutdown(ipc_srv
->cli
);
685 /* now add it to the cache (internal or external) */
687 errno
= 0; /* let cache function set errno if it likes */
688 if (smbc_getFunctionAddCachedServer(context
)(context
, ipc_srv
,
693 DEBUG(3, (" Failed to add server to cache\n"));
697 cli_shutdown(ipc_srv
->cli
);
702 DLIST_ADD(context
->internal
->servers
, ipc_srv
);