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 "../libcli/smb/smb_signing.h"
25 #include "../libcli/smb/smb_seal.h"
26 #include "async_smb.h"
27 #include "../libcli/smb/smbXcli_base.h"
28 #include "../librpc/ndr/libndr.h"
29 #include "../include/client.h"
31 /*******************************************************************
32 Setup the word count and byte count for a client smb message.
33 ********************************************************************/
35 int cli_set_message(char *buf,int num_words,int num_bytes,bool zero)
37 if (zero && (num_words || num_bytes)) {
38 memset(buf + smb_size,'\0',num_words*2 + num_bytes);
40 SCVAL(buf,smb_wct,num_words);
41 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
42 smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
43 return (smb_size + num_words*2 + num_bytes);
46 /****************************************************************************
47 Change the timeout (in milliseconds).
48 ****************************************************************************/
50 unsigned int cli_set_timeout(struct cli_state *cli, unsigned int timeout)
52 unsigned int old_timeout = cli->timeout;
53 cli->timeout = timeout;
57 /****************************************************************************
58 Set the 'backup_intent' flag.
59 ****************************************************************************/
61 bool cli_set_backup_intent(struct cli_state *cli, bool flag)
63 bool old_state = cli->backup_intent;
64 cli->backup_intent = flag;
68 /****************************************************************************
69 Initialise a client structure. Always returns a talloc'ed struct.
70 Set the signing state (used from the command line).
71 ****************************************************************************/
73 struct GUID cli_state_client_guid;
75 struct cli_state *cli_state_create(TALLOC_CTX *mem_ctx,
77 const char *remote_name,
78 int signing_state, int flags)
80 struct cli_state *cli = NULL;
81 bool use_spnego = lp_client_use_spnego();
82 bool force_dos_errors = false;
83 bool force_ascii = false;
84 bool use_level_II_oplocks = false;
85 uint32_t smb1_capabilities = 0;
86 uint32_t smb2_capabilities = 0;
87 struct GUID client_guid;
89 if (!GUID_all_zero(&cli_state_client_guid)) {
90 client_guid = cli_state_client_guid;
92 client_guid = GUID_random();
95 /* Check the effective uid - make sure we are not setuid */
96 if (is_setuid_root()) {
97 DEBUG(0,("libsmb based programs must *NOT* be setuid root.\n"));
101 cli = talloc_zero(mem_ctx, struct cli_state);
106 cli->server_domain = talloc_strdup(cli, "");
107 if (!cli->server_domain) {
110 cli->server_os = talloc_strdup(cli, "");
111 if (!cli->server_os) {
114 cli->server_type = talloc_strdup(cli, "");
115 if (!cli->server_type) {
119 cli->dfs_mountpoint = talloc_strdup(cli, "");
120 if (!cli->dfs_mountpoint) {
123 cli->raw_status = NT_STATUS_INTERNAL_ERROR;
124 cli->map_dos_errors = true; /* remove this */
125 cli->timeout = CLIENT_TIMEOUT;
127 /* Set the CLI_FORCE_DOSERR environment variable to test
128 client routines using DOS errors instead of STATUS32
129 ones. This intended only as a temporary hack. */
130 if (getenv("CLI_FORCE_DOSERR")) {
131 force_dos_errors = true;
133 if (flags & CLI_FULL_CONNECTION_FORCE_DOS_ERRORS) {
134 force_dos_errors = true;
137 if (getenv("CLI_FORCE_ASCII")) {
143 if (flags & CLI_FULL_CONNECTION_FORCE_ASCII) {
147 if (flags & CLI_FULL_CONNECTION_DONT_SPNEGO) {
149 } else if (flags & CLI_FULL_CONNECTION_USE_KERBEROS) {
150 cli->use_kerberos = true;
152 if ((flags & CLI_FULL_CONNECTION_FALLBACK_AFTER_KERBEROS) &&
154 cli->fallback_after_kerberos = true;
157 if (flags & CLI_FULL_CONNECTION_USE_CCACHE) {
158 cli->use_ccache = true;
161 if (flags & CLI_FULL_CONNECTION_USE_NT_HASH) {
162 cli->pw_nt_hash = true;
165 if (flags & CLI_FULL_CONNECTION_OPLOCKS) {
166 cli->use_oplocks = true;
168 if (flags & CLI_FULL_CONNECTION_LEVEL_II_OPLOCKS) {
169 use_level_II_oplocks = true;
172 if (signing_state == SMB_SIGNING_IPC_DEFAULT) {
174 * Ensure for IPC/RPC the default is to require
175 * signing unless explicitly turned off by the
178 signing_state = lp_client_ipc_signing();
181 if (signing_state == SMB_SIGNING_DEFAULT) {
182 signing_state = lp_client_signing();
185 smb1_capabilities = 0;
186 smb1_capabilities |= CAP_LARGE_FILES;
187 smb1_capabilities |= CAP_NT_SMBS | CAP_RPC_REMOTE_APIS;
188 smb1_capabilities |= CAP_LOCK_AND_READ | CAP_NT_FIND;
189 smb1_capabilities |= CAP_DFS | CAP_W2K_SMBS;
190 smb1_capabilities |= CAP_LARGE_READX|CAP_LARGE_WRITEX;
191 smb1_capabilities |= CAP_LWIO;
193 if (!force_dos_errors) {
194 smb1_capabilities |= CAP_STATUS32;
198 smb1_capabilities |= CAP_UNICODE;
202 smb1_capabilities |= CAP_EXTENDED_SECURITY;
205 if (use_level_II_oplocks) {
206 smb1_capabilities |= CAP_LEVEL_II_OPLOCKS;
209 smb2_capabilities = SMB2_CAP_ALL;
211 cli->conn = smbXcli_conn_create(cli, fd, remote_name,
216 if (cli->conn == NULL) {
220 cli->smb1.pid = (uint32_t)getpid();
221 cli->smb1.vc_num = cli->smb1.pid;
222 cli->smb1.session = smbXcli_session_create(cli, cli->conn);
223 if (cli->smb1.session == NULL) {
227 cli->initialised = 1;
230 /* Clean up after malloc() error */
238 /****************************************************************************
239 Close all pipes open on this session.
240 ****************************************************************************/
242 void cli_nt_pipes_close(struct cli_state *cli)
244 while (cli->pipe_list != NULL) {
246 * No TALLOC_FREE here!
248 talloc_free(cli->pipe_list);
252 /****************************************************************************
253 Shutdown a client structure.
254 ****************************************************************************/
256 static void _cli_shutdown(struct cli_state *cli)
258 cli_nt_pipes_close(cli);
261 * tell our peer to free his resources. Wihtout this, when an
262 * application attempts to do a graceful shutdown and calls
263 * smbc_free_context() to clean up all connections, some connections
264 * can remain active on the peer end, until some (long) timeout period
265 * later. This tree disconnect forces the peer to clean up, since the
266 * connection will be going away.
268 if (cli_state_has_tcon(cli)) {
272 smbXcli_conn_disconnect(cli->conn, NT_STATUS_OK);
277 void cli_shutdown(struct cli_state *cli)
279 struct cli_state *cli_head;
283 DLIST_HEAD(cli, cli_head);
284 if (cli_head == cli) {
286 * head of a DFS list, shutdown all subsidiary DFS
289 struct cli_state *p, *next;
291 for (p = cli_head->next; p; p = next) {
293 DLIST_REMOVE(cli_head, p);
297 DLIST_REMOVE(cli_head, cli);
303 uint16_t cli_state_get_vc_num(struct cli_state *cli)
305 return cli->smb1.vc_num;
308 /****************************************************************************
309 Set the PID to use for smb messages. Return the old pid.
310 ****************************************************************************/
312 uint32_t cli_setpid(struct cli_state *cli, uint32_t pid)
314 uint32_t ret = cli->smb1.pid;
319 uint32_t cli_getpid(struct cli_state *cli)
321 return cli->smb1.pid;
324 bool cli_state_has_tcon(struct cli_state *cli)
327 if (smbXcli_conn_protocol(cli->conn) >= PROTOCOL_SMB2_02) {
328 if (cli->smb2.tcon == NULL) {
331 tid = cli_state_get_tid(cli);
332 if (tid == UINT32_MAX) {
336 if (cli->smb1.tcon == NULL) {
339 tid = cli_state_get_tid(cli);
340 if (tid == UINT16_MAX) {
347 uint32_t cli_state_get_tid(struct cli_state *cli)
349 if (smbXcli_conn_protocol(cli->conn) >= PROTOCOL_SMB2_02) {
350 return smb2cli_tcon_current_id(cli->smb2.tcon);
352 return (uint32_t)smb1cli_tcon_current_id(cli->smb1.tcon);
356 uint32_t cli_state_set_tid(struct cli_state *cli, uint32_t tid)
359 if (smbXcli_conn_protocol(cli->conn) >= PROTOCOL_SMB2_02) {
360 ret = smb2cli_tcon_current_id(cli->smb2.tcon);
361 smb2cli_tcon_set_id(cli->smb1.tcon, tid);
363 ret = smb1cli_tcon_current_id(cli->smb1.tcon);
364 smb1cli_tcon_set_id(cli->smb1.tcon, tid);
369 struct smbXcli_tcon *cli_state_save_tcon(struct cli_state *cli)
371 if (smbXcli_conn_protocol(cli->conn) >= PROTOCOL_SMB2_02) {
372 return smbXcli_tcon_copy(cli, cli->smb2.tcon);
374 return smbXcli_tcon_copy(cli, cli->smb1.tcon);
378 void cli_state_restore_tcon(struct cli_state *cli, struct smbXcli_tcon *tcon)
380 if (smbXcli_conn_protocol(cli->conn) >= PROTOCOL_SMB2_02) {
381 TALLOC_FREE(cli->smb2.tcon);
382 cli->smb2.tcon = tcon;
384 TALLOC_FREE(cli->smb1.tcon);
385 cli->smb1.tcon = tcon;
389 uint16_t cli_state_get_uid(struct cli_state *cli)
391 return smb1cli_session_current_id(cli->smb1.session);
394 uint16_t cli_state_set_uid(struct cli_state *cli, uint16_t uid)
396 uint16_t ret = smb1cli_session_current_id(cli->smb1.session);
397 smb1cli_session_set_id(cli->smb1.session, uid);
401 /****************************************************************************
402 Set the case sensitivity flag on the packets. Returns old state.
403 ****************************************************************************/
405 bool cli_set_case_sensitive(struct cli_state *cli, bool case_sensitive)
409 struct smbXcli_tcon *tcon;
411 if (smbXcli_conn_protocol(cli->conn) >= PROTOCOL_SMB2_02) {
412 tcon = cli->smb2.tcon;
414 tcon = cli->smb1.tcon;
417 fs_attrs = smbXcli_tcon_get_fs_attributes(tcon);
418 if (fs_attrs & FILE_CASE_SENSITIVE_SEARCH) {
423 if (case_sensitive) {
424 fs_attrs |= FILE_CASE_SENSITIVE_SEARCH;
426 fs_attrs &= ~FILE_CASE_SENSITIVE_SEARCH;
428 smbXcli_tcon_set_fs_attributes(tcon, fs_attrs);
433 uint32_t cli_state_available_size(struct cli_state *cli, uint32_t ofs)
435 uint32_t ret = smb1cli_conn_max_xmit(cli->conn);
446 time_t cli_state_server_time(struct cli_state *cli)
451 nt = smbXcli_conn_server_system_time(cli->conn);
452 t = nt_time_to_unix(nt);
457 struct cli_echo_state {
461 static void cli_echo_done(struct tevent_req *subreq);
463 struct tevent_req *cli_echo_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev,
464 struct cli_state *cli, uint16_t num_echos,
467 struct tevent_req *req, *subreq;
468 struct cli_echo_state *state;
470 req = tevent_req_create(mem_ctx, &state, struct cli_echo_state);
475 if (smbXcli_conn_protocol(cli->conn) >= PROTOCOL_SMB2_02) {
476 state->is_smb2 = true;
477 subreq = smb2cli_echo_send(state, ev,
481 subreq = smb1cli_echo_send(state, ev,
487 if (tevent_req_nomem(subreq, req)) {
488 return tevent_req_post(req, ev);
490 tevent_req_set_callback(subreq, cli_echo_done, req);
495 static void cli_echo_done(struct tevent_req *subreq)
497 struct tevent_req *req = tevent_req_callback_data(
498 subreq, struct tevent_req);
499 struct cli_echo_state *state = tevent_req_data(
500 req, struct cli_echo_state);
503 if (state->is_smb2) {
504 status = smb2cli_echo_recv(subreq);
506 status = smb1cli_echo_recv(subreq);
509 if (!NT_STATUS_IS_OK(status)) {
510 tevent_req_nterror(req, status);
514 tevent_req_done(req);
518 * Get the result out from an echo request
519 * @param[in] req The async_req from cli_echo_send
520 * @retval Did the server reply correctly?
523 NTSTATUS cli_echo_recv(struct tevent_req *req)
525 return tevent_req_simple_recv_ntstatus(req);
529 * @brief Send/Receive SMBEcho requests
530 * @param[in] mem_ctx The memory context to put the async_req on
531 * @param[in] ev The event context that will call us back
532 * @param[in] cli The connection to send the echo to
533 * @param[in] num_echos How many times do we want to get the reply?
534 * @param[in] data The data we want to get back
535 * @retval Did the server reply correctly?
538 NTSTATUS cli_echo(struct cli_state *cli, uint16_t num_echos, DATA_BLOB data)
540 TALLOC_CTX *frame = talloc_stackframe();
541 struct tevent_context *ev;
542 struct tevent_req *req;
543 NTSTATUS status = NT_STATUS_OK;
545 if (smbXcli_conn_has_async_calls(cli->conn)) {
547 * Can't use sync call while an async call is in flight
549 status = NT_STATUS_INVALID_PARAMETER;
553 ev = samba_tevent_context_init(frame);
555 status = NT_STATUS_NO_MEMORY;
559 req = cli_echo_send(frame, ev, cli, num_echos, data);
561 status = NT_STATUS_NO_MEMORY;
565 if (!tevent_req_poll_ntstatus(req, ev, &status)) {
569 status = cli_echo_recv(req);
576 * Is the SMB command able to hold an AND_X successor
577 * @param[in] cmd The SMB command in question
578 * @retval Can we add a chained request after "cmd"?
580 bool is_andx_req(uint8_t cmd)
600 NTSTATUS cli_smb(TALLOC_CTX *mem_ctx, struct cli_state *cli,
601 uint8_t smb_command, uint8_t additional_flags,
602 uint8_t wct, uint16_t *vwv,
603 uint32_t num_bytes, const uint8_t *bytes,
604 struct tevent_req **result_parent,
605 uint8_t min_wct, uint8_t *pwct, uint16_t **pvwv,
606 uint32_t *pnum_bytes, uint8_t **pbytes)
608 struct tevent_context *ev;
609 struct tevent_req *req = NULL;
610 NTSTATUS status = NT_STATUS_NO_MEMORY;
612 if (smbXcli_conn_has_async_calls(cli->conn)) {
613 return NT_STATUS_INVALID_PARAMETER;
615 ev = samba_tevent_context_init(mem_ctx);
619 req = cli_smb_send(mem_ctx, ev, cli, smb_command, additional_flags, 0,
620 wct, vwv, num_bytes, bytes);
624 if (!tevent_req_poll_ntstatus(req, ev, &status)) {
627 status = cli_smb_recv(req, NULL, NULL, min_wct, pwct, pvwv,
631 if (NT_STATUS_IS_OK(status) && (result_parent != NULL)) {
632 *result_parent = req;