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,
105 strlcpy(workgroup, *pp_workgroup, sizeof(workgroup));
106 strlcpy(username, *pp_username, sizeof(username));
107 strlcpy(password, *pp_password, sizeof(password));
109 smbc_getFunctionAuthData(context)(server, share,
110 workgroup, sizeof(workgroup),
111 username, sizeof(username),
112 password, sizeof(password));
114 TALLOC_FREE(*pp_workgroup);
115 TALLOC_FREE(*pp_username);
116 TALLOC_FREE(*pp_password);
118 *pp_workgroup = talloc_strdup(ctx, workgroup);
119 *pp_username = talloc_strdup(ctx, username);
120 *pp_password = talloc_strdup(ctx, password);
125 SMBC_get_auth_data(const char *server, const char *share,
126 char *workgroup_buf, int workgroup_buf_len,
127 char *username_buf, int username_buf_len,
128 char *password_buf, int password_buf_len)
130 /* Default function just uses provided data. Nothing to do. */
136 SMBC_find_server(TALLOC_CTX *ctx,
149 srv = smbc_getFunctionGetCachedServer(context)(context,
154 if (!auth_called && !srv && (!*pp_username || !(*pp_username)[0] ||
155 !*pp_password || !(*pp_password)[0])) {
156 SMBC_call_auth_fn(ctx, context, server, share,
157 pp_workgroup, pp_username, pp_password);
159 if (!pp_workgroup || !pp_username || !pp_password) {
164 * However, smbc_auth_fn may have picked up info relating to
165 * an existing connection, so try for an existing connection
169 goto check_server_cache;
174 if (smbc_getFunctionCheckServer(context)(context, srv)) {
176 * This server is no good anymore
177 * Try to remove it and check for more possible
178 * servers in the cache
180 if (smbc_getFunctionRemoveUnusedServer(context)(context,
183 * We could not remove the server completely,
184 * remove it from the cache so we will not get
185 * it again. It will be removed when the last
186 * file/dir is closed.
188 smbc_getFunctionRemoveCachedServer(context)(context,
193 * Maybe there are more cached connections to this
196 goto check_server_cache;
206 * Connect to a server, possibly on an existing connection
208 * Here, what we want to do is: If the server and username
209 * match an existing connection, reuse that, otherwise, establish a
212 * If we have to create a new connection, call the auth_fn to get the
213 * info we need, unless the username and password were passed in.
217 SMBC_server(TALLOC_CTX *ctx,
219 bool connect_if_not_found,
228 struct nmb_name called, calling;
229 const char *server_n = server;
230 struct sockaddr_storage ss;
231 int tried_reverse = 0;
234 const char *username_used;
240 if (server[0] == 0) {
245 /* Look for a cached connection */
246 srv = SMBC_find_server(ctx, context, server, share,
247 pp_workgroup, pp_username, pp_password);
250 * If we found a connection and we're only allowed one share per
255 smbc_getOptionOneSharePerServer(context)) {
258 * ... then if there's no current connection to the share,
259 * connect to it. SMBC_find_server(), or rather the function
260 * pointed to by context->get_cached_srv_fn which
261 * was called by SMBC_find_server(), will have issued a tree
262 * disconnect if the requested share is not the same as the
263 * one that was already connected.
265 if (srv->cli->cnum == (uint16) -1) {
266 /* Ensure we have accurate auth info */
267 SMBC_call_auth_fn(ctx, context, server, share,
272 if (!*pp_workgroup || !*pp_username || !*pp_password) {
274 cli_shutdown(srv->cli);
276 smbc_getFunctionRemoveCachedServer(context)(context,
282 * We don't need to renegotiate encryption
283 * here as the encryption context is not per
287 if (!cli_send_tconX(srv->cli, share, "?????",
289 strlen(*pp_password)+1)) {
291 errno = SMBC_errno(context, srv->cli);
292 cli_shutdown(srv->cli);
294 smbc_getFunctionRemoveCachedServer(context)(context,
300 * Regenerate the dev value since it's based on both
304 srv->dev = (dev_t)(str_checksum(server) ^
305 str_checksum(share));
310 /* If we have a connection... */
313 /* ... then we're done here. Give 'em what they came for. */
317 /* If we're not asked to connect when a connection doesn't exist... */
318 if (! connect_if_not_found) {
319 /* ... then we're done here. */
323 if (!*pp_workgroup || !*pp_username || !*pp_password) {
328 make_nmb_name(&calling, smbc_getNetbiosName(context), 0x0);
329 make_nmb_name(&called , server, 0x20);
331 DEBUG(4,("SMBC_server: server_n=[%s] server=[%s]\n", server_n, server));
333 DEBUG(4,(" -> server_n=[%s] server=[%s]\n", server_n, server));
339 /* have to open a new connection */
340 if ((c = cli_initialise()) == NULL) {
345 if (smbc_getOptionUseKerberos(context)) {
346 c->use_kerberos = True;
349 if (smbc_getOptionFallbackAfterKerberos(context)) {
350 c->fallback_after_kerberos = True;
353 c->timeout = smbc_getTimeout(context);
356 * Force use of port 139 for first try if share is $IPC, empty, or
357 * null, so browse lists can work
359 if (share == NULL || *share == '\0' || strcmp(share, "IPC$") == 0) {
360 port_try_first = 139;
363 port_try_first = 445;
367 c->port = port_try_first;
369 status = cli_connect(c, server_n, &ss);
370 if (!NT_STATUS_IS_OK(status)) {
372 /* First connection attempt failed. Try alternate port. */
373 c->port = port_try_next;
375 status = cli_connect(c, server_n, &ss);
376 if (!NT_STATUS_IS_OK(status)) {
383 if (!cli_session_request(c, &calling, &called)) {
385 if (strcmp(called.name, "*SMBSERVER")) {
386 make_nmb_name(&called , "*SMBSERVER", 0x20);
388 } else { /* Try one more time, but ensure we don't loop */
390 /* Only try this if server is an IP address ... */
392 if (is_ipaddress(server) && !tried_reverse) {
394 struct sockaddr_storage rem_ss;
396 if (!interpret_string_addr(&rem_ss, server,
398 DEBUG(4, ("Could not convert IP address "
399 "%s to struct sockaddr_storage\n",
405 tried_reverse++; /* Yuck */
407 if (name_status_find("*", 0, 0,
408 &rem_ss, remote_name)) {
409 make_nmb_name(&called,
420 DEBUG(4,(" session request ok\n"));
422 if (!cli_negprot(c)) {
428 username_used = *pp_username;
430 if (!NT_STATUS_IS_OK(cli_session_setup(c, username_used,
432 strlen(*pp_password),
434 strlen(*pp_password),
437 /* Failed. Try an anonymous login, if allowed by flags. */
440 if (smbc_getOptionNoAutoAnonymousLogin(context) ||
441 !NT_STATUS_IS_OK(cli_session_setup(c, username_used,
452 DEBUG(4,(" session setup ok\n"));
454 if (!cli_send_tconX(c, share, "?????",
455 *pp_password, strlen(*pp_password)+1)) {
456 errno = SMBC_errno(context, c);
461 DEBUG(4,(" tconx ok\n"));
463 if (context->internal->smb_encryption_level) {
464 /* Attempt UNIX smb encryption. */
465 if (!NT_STATUS_IS_OK(cli_force_encryption(c,
471 * context->smb_encryption_level == 1
472 * means don't fail if encryption can't be negotiated,
473 * == 2 means fail if encryption can't be negotiated.
476 DEBUG(4,(" SMB encrypt failed\n"));
478 if (context->internal->smb_encryption_level == 2) {
484 DEBUG(4,(" SMB encrypt ok\n"));
488 * Ok, we have got a nice connection
489 * Let's allocate a server structure.
492 srv = SMB_MALLOC_P(SMBCSRV);
500 srv->dev = (dev_t)(str_checksum(server) ^ str_checksum(share));
501 srv->no_pathinfo = False;
502 srv->no_pathinfo2 = False;
503 srv->no_nt_session = False;
505 /* now add it to the cache (internal or external) */
506 /* Let the cache function set errno if it wants to */
508 if (smbc_getFunctionAddCachedServer(context)(context, srv,
512 int saved_errno = errno;
513 DEBUG(3, (" Failed to add server to cache\n"));
521 DEBUG(2, ("Server connect ok: //%s/%s: %p\n",
522 server, share, srv));
524 DLIST_ADD(context->internal->servers, srv);
538 * Connect to a server for getting/setting attributes, possibly on an existing
539 * connection. This works similarly to SMBC_server().
542 SMBC_attr_server(TALLOC_CTX *ctx,
551 struct sockaddr_storage ss;
552 struct cli_state *ipc_cli;
553 struct rpc_pipe_client *pipe_hnd;
555 SMBCSRV *ipc_srv=NULL;
558 * See if we've already created this special connection. Reference
559 * our "special" share name '*IPC$', which is an impossible real share
560 * name due to the leading asterisk.
562 ipc_srv = SMBC_find_server(ctx, context, server, "*IPC$",
563 pp_workgroup, pp_username, pp_password);
566 /* We didn't find a cached connection. Get the password */
567 if (!*pp_password || (*pp_password)[0] == '\0') {
568 /* ... then retrieve it now. */
569 SMBC_call_auth_fn(ctx, context, server, share,
573 if (!*pp_workgroup || !*pp_username || !*pp_password) {
580 if (smbc_getOptionUseKerberos(context)) {
581 flags |= CLI_FULL_CONNECTION_USE_KERBEROS;
585 nt_status = cli_full_connection(&ipc_cli,
586 global_myname(), server,
587 &ss, 0, "IPC$", "?????",
593 if (! NT_STATUS_IS_OK(nt_status)) {
594 DEBUG(1,("cli_full_connection failed! (%s)\n",
595 nt_errstr(nt_status)));
600 if (context->internal->smb_encryption_level) {
601 /* Attempt UNIX smb encryption. */
602 if (!NT_STATUS_IS_OK(cli_force_encryption(ipc_cli,
608 * context->smb_encryption_level ==
609 * 1 means don't fail if encryption can't be
610 * negotiated, == 2 means fail if encryption
611 * can't be negotiated.
614 DEBUG(4,(" SMB encrypt failed on IPC$\n"));
616 if (context->internal->smb_encryption_level == 2) {
617 cli_shutdown(ipc_cli);
622 DEBUG(4,(" SMB encrypt ok on IPC$\n"));
625 ipc_srv = SMB_MALLOC_P(SMBCSRV);
628 cli_shutdown(ipc_cli);
632 ZERO_STRUCTP(ipc_srv);
633 ipc_srv->cli = ipc_cli;
635 pipe_hnd = cli_rpc_pipe_open_noauth(ipc_srv->cli,
639 DEBUG(1, ("cli_nt_session_open fail!\n"));
641 cli_shutdown(ipc_srv->cli);
647 * Some systems don't support
648 * SEC_RIGHTS_MAXIMUM_ALLOWED, but NT sends 0x2000000
649 * so we might as well do it too.
652 nt_status = rpccli_lsa_open_policy(
656 GENERIC_EXECUTE_ACCESS,
659 if (!NT_STATUS_IS_OK(nt_status)) {
660 errno = SMBC_errno(context, ipc_srv->cli);
661 cli_shutdown(ipc_srv->cli);
665 /* now add it to the cache (internal or external) */
667 errno = 0; /* let cache function set errno if it likes */
668 if (smbc_getFunctionAddCachedServer(context)(context, ipc_srv,
673 DEBUG(3, (" Failed to add server to cache\n"));
677 cli_shutdown(ipc_srv->cli);
682 DLIST_ADD(context->internal->servers, ipc_srv);