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);