2 Unix SMB/CIFS implementation.
3 SMB client generic functions
4 Copyright (C) Andrew Tridgell 1994-1998
5 Copyright (C) Jeremy Allison 2007.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #include "libsmb/libsmb.h"
23 #include "../lib/util/tevent_ntstatus.h"
24 #include "smb_signing.h"
25 #include "async_smb.h"
27 /*******************************************************************
28 Setup the word count and byte count for a client smb message.
29 ********************************************************************/
31 int cli_set_message(char *buf,int num_words,int num_bytes,bool zero)
33 if (zero && (num_words || num_bytes)) {
34 memset(buf + smb_size,'\0',num_words*2 + num_bytes);
36 SCVAL(buf,smb_wct,num_words);
37 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
38 smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
39 return (smb_size + num_words*2 + num_bytes);
42 /****************************************************************************
43 Change the timeout (in milliseconds).
44 ****************************************************************************/
46 unsigned int cli_set_timeout(struct cli_state *cli, unsigned int timeout)
48 unsigned int old_timeout = cli->timeout;
49 cli->timeout = timeout;
53 /****************************************************************************
54 Change the port number used to call on.
55 ****************************************************************************/
57 void cli_set_port(struct cli_state *cli, int port)
62 /****************************************************************************
63 convenience routine to find if we negotiated ucs2
64 ****************************************************************************/
66 bool cli_ucs2(struct cli_state *cli)
68 return ((cli->capabilities & CAP_UNICODE) != 0);
71 /****************************************************************************
72 Setup basics in a outgoing packet.
73 ****************************************************************************/
75 void cli_setup_packet_buf(struct cli_state *cli, char *buf)
79 SIVAL(buf,smb_rcls,0);
80 SSVAL(buf,smb_pid,cli->pid);
81 memset(buf+smb_pidhigh, 0, 12);
82 SSVAL(buf,smb_uid,cli->vuid);
83 SSVAL(buf,smb_mid,cli->mid);
85 if (cli->protocol <= PROTOCOL_CORE) {
89 if (cli->case_sensitive) {
90 SCVAL(buf,smb_flg,0x0);
92 /* Default setting, case insensitive. */
93 SCVAL(buf,smb_flg,0x8);
95 flags2 = FLAGS2_LONG_PATH_COMPONENTS;
96 if (cli->capabilities & CAP_UNICODE)
97 flags2 |= FLAGS2_UNICODE_STRINGS;
98 if ((cli->capabilities & CAP_DFS) && cli->dfsroot)
99 flags2 |= FLAGS2_DFS_PATHNAMES;
100 if (cli->capabilities & CAP_STATUS32)
101 flags2 |= FLAGS2_32_BIT_ERROR_CODES;
103 flags2 |= FLAGS2_EXTENDED_SECURITY;
104 SSVAL(buf,smb_flg2, flags2);
107 /****************************************************************************
108 Initialize Domain, user or password.
109 ****************************************************************************/
111 NTSTATUS cli_set_domain(struct cli_state *cli, const char *domain)
113 TALLOC_FREE(cli->domain);
114 cli->domain = talloc_strdup(cli, domain ? domain : "");
115 if (cli->domain == NULL) {
116 return NT_STATUS_NO_MEMORY;
121 NTSTATUS cli_set_username(struct cli_state *cli, const char *username)
123 TALLOC_FREE(cli->user_name);
124 cli->user_name = talloc_strdup(cli, username ? username : "");
125 if (cli->user_name == NULL) {
126 return NT_STATUS_NO_MEMORY;
131 NTSTATUS cli_set_password(struct cli_state *cli, const char *password)
133 TALLOC_FREE(cli->password);
135 /* Password can be NULL. */
137 cli->password = talloc_strdup(cli, password);
138 if (cli->password == NULL) {
139 return NT_STATUS_NO_MEMORY;
142 /* Use zero NTLMSSP hashes and session key. */
143 cli->password = NULL;
149 /****************************************************************************
150 Initialise credentials of a client structure.
151 ****************************************************************************/
153 NTSTATUS cli_init_creds(struct cli_state *cli, const char *username, const char *domain, const char *password)
155 NTSTATUS status = cli_set_username(cli, username);
156 if (!NT_STATUS_IS_OK(status)) {
159 status = cli_set_domain(cli, domain);
160 if (!NT_STATUS_IS_OK(status)) {
163 DEBUG(10,("cli_init_creds: user %s domain %s\n", cli->user_name, cli->domain));
165 return cli_set_password(cli, password);
168 /****************************************************************************
169 Initialise a client structure. Always returns a talloc'ed struct.
170 Set the signing state (used from the command line).
171 ****************************************************************************/
173 struct cli_state *cli_initialise_ex(int signing_state)
175 struct cli_state *cli = NULL;
176 bool allow_smb_signing = false;
177 bool mandatory_signing = false;
179 /* Check the effective uid - make sure we are not setuid */
180 if (is_setuid_root()) {
181 DEBUG(0,("libsmb based programs must *NOT* be setuid root.\n"));
185 cli = talloc_zero(NULL, struct cli_state);
190 cli->dfs_mountpoint = talloc_strdup(cli, "");
191 if (!cli->dfs_mountpoint) {
197 cli->pid = (uint16)sys_getpid();
199 cli->vuid = UID_FIELD_INVALID;
200 cli->protocol = PROTOCOL_NT1;
201 cli->timeout = 20000; /* Timeout is in milliseconds. */
202 cli->bufsize = CLI_BUFFER_SIZE+4;
203 cli->max_xmit = cli->bufsize;
204 cli->outbuf = (char *)SMB_MALLOC(cli->bufsize+SAFETY_MARGIN);
205 cli->inbuf = (char *)SMB_MALLOC(cli->bufsize+SAFETY_MARGIN);
206 cli->oplock_handler = cli_oplock_ack;
207 cli->case_sensitive = false;
208 cli->smb_rw_error = SMB_READ_OK;
210 cli->use_spnego = lp_client_use_spnego();
212 cli->capabilities = CAP_UNICODE | CAP_STATUS32 | CAP_DFS;
214 /* Set the CLI_FORCE_DOSERR environment variable to test
215 client routines using DOS errors instead of STATUS32
216 ones. This intended only as a temporary hack. */
217 if (getenv("CLI_FORCE_DOSERR"))
218 cli->force_dos_errors = true;
220 if (lp_client_signing()) {
221 allow_smb_signing = true;
224 if (lp_client_signing() == Required) {
225 mandatory_signing = true;
228 if (signing_state != Undefined) {
229 allow_smb_signing = true;
232 if (signing_state == false) {
233 allow_smb_signing = false;
234 mandatory_signing = false;
237 if (signing_state == Required) {
238 mandatory_signing = true;
241 if (!cli->outbuf || !cli->inbuf)
244 memset(cli->outbuf, 0, cli->bufsize);
245 memset(cli->inbuf, 0, cli->bufsize);
247 /* initialise signing */
248 cli->signing_state = smb_signing_init(cli,
251 if (!cli->signing_state) {
255 cli->outgoing = tevent_queue_create(cli, "cli_outgoing");
256 if (cli->outgoing == NULL) {
261 cli->initialised = 1;
265 /* Clean up after malloc() error */
269 SAFE_FREE(cli->inbuf);
270 SAFE_FREE(cli->outbuf);
275 struct cli_state *cli_initialise(void)
277 return cli_initialise_ex(Undefined);
280 /****************************************************************************
281 Close all pipes open on this session.
282 ****************************************************************************/
284 void cli_nt_pipes_close(struct cli_state *cli)
286 while (cli->pipe_list != NULL) {
288 * No TALLOC_FREE here!
290 talloc_free(cli->pipe_list);
294 /****************************************************************************
295 Shutdown a client structure.
296 ****************************************************************************/
298 static void _cli_shutdown(struct cli_state *cli)
300 cli_nt_pipes_close(cli);
303 * tell our peer to free his resources. Wihtout this, when an
304 * application attempts to do a graceful shutdown and calls
305 * smbc_free_context() to clean up all connections, some connections
306 * can remain active on the peer end, until some (long) timeout period
307 * later. This tree disconnect forces the peer to clean up, since the
308 * connection will be going away.
310 * Also, do not do tree disconnect when cli->smb_rw_error is SMB_DO_NOT_DO_TDIS
311 * the only user for this so far is smbmount which passes opened connection
312 * down to kernel's smbfs module.
314 if ( (cli->cnum != (uint16)-1) && (cli->smb_rw_error != SMB_DO_NOT_DO_TDIS ) ) {
318 SAFE_FREE(cli->outbuf);
319 SAFE_FREE(cli->inbuf);
321 data_blob_free(&cli->secblob);
322 data_blob_free(&cli->user_session_key);
328 cli->smb_rw_error = SMB_READ_OK;
331 * Need to free pending first, they remove themselves
333 while (cli->pending) {
334 talloc_free(cli->pending[0]);
339 void cli_shutdown(struct cli_state *cli)
341 struct cli_state *cli_head;
345 DLIST_HEAD(cli, cli_head);
346 if (cli_head == cli) {
348 * head of a DFS list, shutdown all subsidiary DFS
351 struct cli_state *p, *next;
353 for (p = cli_head->next; p; p = next) {
355 DLIST_REMOVE(cli_head, p);
359 DLIST_REMOVE(cli_head, cli);
365 /****************************************************************************
366 Set socket options on a open connection.
367 ****************************************************************************/
369 void cli_sockopt(struct cli_state *cli, const char *options)
371 set_socket_options(cli->fd, options);
374 /****************************************************************************
375 Set the PID to use for smb messages. Return the old pid.
376 ****************************************************************************/
378 uint16 cli_setpid(struct cli_state *cli, uint16 pid)
380 uint16 ret = cli->pid;
385 /****************************************************************************
386 Set the case sensitivity flag on the packets. Returns old state.
387 ****************************************************************************/
389 bool cli_set_case_sensitive(struct cli_state *cli, bool case_sensitive)
391 bool ret = cli->case_sensitive;
392 cli->case_sensitive = case_sensitive;
396 struct cli_echo_state {
402 static void cli_echo_done(struct tevent_req *subreq);
404 struct tevent_req *cli_echo_send(TALLOC_CTX *mem_ctx, struct event_context *ev,
405 struct cli_state *cli, uint16_t num_echos,
408 struct tevent_req *req, *subreq;
409 struct cli_echo_state *state;
411 req = tevent_req_create(mem_ctx, &state, struct cli_echo_state);
415 SSVAL(state->vwv, 0, num_echos);
417 state->num_echos = num_echos;
419 subreq = cli_smb_send(state, ev, cli, SMBecho, 0, 1, state->vwv,
420 data.length, data.data);
421 if (subreq == NULL) {
424 tevent_req_set_callback(subreq, cli_echo_done, req);
431 static void cli_echo_done(struct tevent_req *subreq)
433 struct tevent_req *req = tevent_req_callback_data(
434 subreq, struct tevent_req);
435 struct cli_echo_state *state = tevent_req_data(
436 req, struct cli_echo_state);
442 status = cli_smb_recv(subreq, state, &inbuf, 0, NULL, NULL,
444 if (!NT_STATUS_IS_OK(status)) {
445 tevent_req_nterror(req, status);
448 if ((num_bytes != state->data.length)
449 || (memcmp(bytes, state->data.data, num_bytes) != 0)) {
450 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
454 state->num_echos -=1;
455 if (state->num_echos == 0) {
456 tevent_req_done(req);
460 if (!cli_smb_req_set_pending(subreq)) {
461 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
467 * Get the result out from an echo request
468 * @param[in] req The async_req from cli_echo_send
469 * @retval Did the server reply correctly?
472 NTSTATUS cli_echo_recv(struct tevent_req *req)
474 return tevent_req_simple_recv_ntstatus(req);
478 * @brief Send/Receive SMBEcho requests
479 * @param[in] mem_ctx The memory context to put the async_req on
480 * @param[in] ev The event context that will call us back
481 * @param[in] cli The connection to send the echo to
482 * @param[in] num_echos How many times do we want to get the reply?
483 * @param[in] data The data we want to get back
484 * @retval Did the server reply correctly?
487 NTSTATUS cli_echo(struct cli_state *cli, uint16_t num_echos, DATA_BLOB data)
489 TALLOC_CTX *frame = talloc_stackframe();
490 struct event_context *ev;
491 struct tevent_req *req;
492 NTSTATUS status = NT_STATUS_OK;
494 if (cli_has_async_calls(cli)) {
496 * Can't use sync call while an async call is in flight
498 status = NT_STATUS_INVALID_PARAMETER;
502 ev = event_context_init(frame);
504 status = NT_STATUS_NO_MEMORY;
508 req = cli_echo_send(frame, ev, cli, num_echos, data);
510 status = NT_STATUS_NO_MEMORY;
514 if (!tevent_req_poll(req, ev)) {
515 status = map_nt_error_from_unix(errno);
519 status = cli_echo_recv(req);
522 if (!NT_STATUS_IS_OK(status)) {
523 cli_set_error(cli, status);
529 * Is the SMB command able to hold an AND_X successor
530 * @param[in] cmd The SMB command in question
531 * @retval Can we add a chained request after "cmd"?
533 bool is_andx_req(uint8_t cmd)
553 NTSTATUS cli_smb(TALLOC_CTX *mem_ctx, struct cli_state *cli,
554 uint8_t smb_command, uint8_t additional_flags,
555 uint8_t wct, uint16_t *vwv,
556 uint32_t num_bytes, const uint8_t *bytes,
557 struct tevent_req **result_parent,
558 uint8_t min_wct, uint8_t *pwct, uint16_t **pvwv,
559 uint32_t *pnum_bytes, uint8_t **pbytes)
561 struct tevent_context *ev;
562 struct tevent_req *req = NULL;
563 NTSTATUS status = NT_STATUS_NO_MEMORY;
565 if (cli_has_async_calls(cli)) {
566 return NT_STATUS_INVALID_PARAMETER;
568 ev = tevent_context_init(mem_ctx);
572 req = cli_smb_send(mem_ctx, ev, cli, smb_command, additional_flags,
573 wct, vwv, num_bytes, bytes);
577 if (!tevent_req_poll_ntstatus(req, ev, &status)) {
580 status = cli_smb_recv(req, NULL, NULL, min_wct, pwct, pvwv,
584 if (NT_STATUS_IS_OK(status) && (result_parent != NULL)) {
585 *result_parent = req;