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;
212 DEBUG(0,("%s:%s: %p\n", __location__, __FUNCTION__, (void *)fd));
213 cli->conn = smbXcli_conn_create(cli, fd, remote_name,
218 if (cli->conn == NULL) {
222 cli->smb1.pid = (uint32_t)getpid();
223 cli->smb1.vc_num = cli->smb1.pid;
224 cli->smb1.session = smbXcli_session_create(cli, cli->conn);
225 if (cli->smb1.session == NULL) {
229 cli->initialised = 1;
232 /* Clean up after malloc() error */
240 /****************************************************************************
241 Close all pipes open on this session.
242 ****************************************************************************/
244 void cli_nt_pipes_close(struct cli_state *cli)
246 while (cli->pipe_list != NULL) {
248 * No TALLOC_FREE here!
250 talloc_free(cli->pipe_list);
254 /****************************************************************************
255 Shutdown a client structure.
256 ****************************************************************************/
258 static void _cli_shutdown(struct cli_state *cli)
260 cli_nt_pipes_close(cli);
263 * tell our peer to free his resources. Wihtout this, when an
264 * application attempts to do a graceful shutdown and calls
265 * smbc_free_context() to clean up all connections, some connections
266 * can remain active on the peer end, until some (long) timeout period
267 * later. This tree disconnect forces the peer to clean up, since the
268 * connection will be going away.
270 if (cli_state_has_tcon(cli)) {
274 smbXcli_conn_disconnect(cli->conn, NT_STATUS_OK);
279 void cli_shutdown(struct cli_state *cli)
281 struct cli_state *cli_head;
285 DLIST_HEAD(cli, cli_head);
286 if (cli_head == cli) {
288 * head of a DFS list, shutdown all subsidiary DFS
291 struct cli_state *p, *next;
293 for (p = cli_head->next; p; p = next) {
295 DLIST_REMOVE(cli_head, p);
299 DLIST_REMOVE(cli_head, cli);
305 uint16_t cli_state_get_vc_num(struct cli_state *cli)
307 return cli->smb1.vc_num;
310 /****************************************************************************
311 Set the PID to use for smb messages. Return the old pid.
312 ****************************************************************************/
314 uint32_t cli_setpid(struct cli_state *cli, uint32_t pid)
316 uint32_t ret = cli->smb1.pid;
321 uint32_t cli_getpid(struct cli_state *cli)
323 return cli->smb1.pid;
326 bool cli_state_is_encryption_on(struct cli_state *cli)
328 if (smbXcli_conn_protocol(cli->conn) < PROTOCOL_SMB2_02) {
329 return smb1cli_conn_encryption_on(cli->conn);
332 if (cli->smb2.tcon == NULL) {
336 return smb2cli_tcon_is_encryption_on(cli->smb2.tcon);
339 bool cli_state_has_tcon(struct cli_state *cli)
342 if (smbXcli_conn_protocol(cli->conn) >= PROTOCOL_SMB2_02) {
343 if (cli->smb2.tcon == NULL) {
346 tid = cli_state_get_tid(cli);
347 if (tid == UINT32_MAX) {
351 if (cli->smb1.tcon == NULL) {
354 tid = cli_state_get_tid(cli);
355 if (tid == UINT16_MAX) {
362 uint32_t cli_state_get_tid(struct cli_state *cli)
364 if (smbXcli_conn_protocol(cli->conn) >= PROTOCOL_SMB2_02) {
365 return smb2cli_tcon_current_id(cli->smb2.tcon);
367 return (uint32_t)smb1cli_tcon_current_id(cli->smb1.tcon);
371 uint32_t cli_state_set_tid(struct cli_state *cli, uint32_t tid)
374 if (smbXcli_conn_protocol(cli->conn) >= PROTOCOL_SMB2_02) {
375 ret = smb2cli_tcon_current_id(cli->smb2.tcon);
376 smb2cli_tcon_set_id(cli->smb2.tcon, tid);
378 ret = smb1cli_tcon_current_id(cli->smb1.tcon);
379 smb1cli_tcon_set_id(cli->smb1.tcon, tid);
384 struct smbXcli_tcon *cli_state_save_tcon(struct cli_state *cli)
386 if (smbXcli_conn_protocol(cli->conn) >= PROTOCOL_SMB2_02) {
387 return smbXcli_tcon_copy(cli, cli->smb2.tcon);
389 return smbXcli_tcon_copy(cli, cli->smb1.tcon);
393 void cli_state_restore_tcon(struct cli_state *cli, struct smbXcli_tcon *tcon)
395 if (smbXcli_conn_protocol(cli->conn) >= PROTOCOL_SMB2_02) {
396 TALLOC_FREE(cli->smb2.tcon);
397 cli->smb2.tcon = tcon;
399 TALLOC_FREE(cli->smb1.tcon);
400 cli->smb1.tcon = tcon;
404 uint16_t cli_state_get_uid(struct cli_state *cli)
406 return smb1cli_session_current_id(cli->smb1.session);
409 uint16_t cli_state_set_uid(struct cli_state *cli, uint16_t uid)
411 uint16_t ret = smb1cli_session_current_id(cli->smb1.session);
412 smb1cli_session_set_id(cli->smb1.session, uid);
416 /****************************************************************************
417 Set the case sensitivity flag on the packets. Returns old state.
418 ****************************************************************************/
420 bool cli_set_case_sensitive(struct cli_state *cli, bool case_sensitive)
424 struct smbXcli_tcon *tcon;
426 if (smbXcli_conn_protocol(cli->conn) >= PROTOCOL_SMB2_02) {
427 tcon = cli->smb2.tcon;
429 tcon = cli->smb1.tcon;
432 fs_attrs = smbXcli_tcon_get_fs_attributes(tcon);
433 if (fs_attrs & FILE_CASE_SENSITIVE_SEARCH) {
438 if (case_sensitive) {
439 fs_attrs |= FILE_CASE_SENSITIVE_SEARCH;
441 fs_attrs &= ~FILE_CASE_SENSITIVE_SEARCH;
443 smbXcli_tcon_set_fs_attributes(tcon, fs_attrs);
448 uint32_t cli_state_available_size(struct cli_state *cli, uint32_t ofs)
450 uint32_t ret = smb1cli_conn_max_xmit(cli->conn);
461 time_t cli_state_server_time(struct cli_state *cli)
466 nt = smbXcli_conn_server_system_time(cli->conn);
467 t = nt_time_to_unix(nt);
472 struct cli_echo_state {
476 static void cli_echo_done(struct tevent_req *subreq);
478 struct tevent_req *cli_echo_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev,
479 struct cli_state *cli, uint16_t num_echos,
482 struct tevent_req *req, *subreq;
483 struct cli_echo_state *state;
485 req = tevent_req_create(mem_ctx, &state, struct cli_echo_state);
490 if (smbXcli_conn_protocol(cli->conn) >= PROTOCOL_SMB2_02) {
491 state->is_smb2 = true;
492 subreq = smb2cli_echo_send(state, ev,
496 subreq = smb1cli_echo_send(state, ev,
502 if (tevent_req_nomem(subreq, req)) {
503 return tevent_req_post(req, ev);
505 tevent_req_set_callback(subreq, cli_echo_done, req);
510 static void cli_echo_done(struct tevent_req *subreq)
512 struct tevent_req *req = tevent_req_callback_data(
513 subreq, struct tevent_req);
514 struct cli_echo_state *state = tevent_req_data(
515 req, struct cli_echo_state);
518 if (state->is_smb2) {
519 status = smb2cli_echo_recv(subreq);
521 status = smb1cli_echo_recv(subreq);
524 if (!NT_STATUS_IS_OK(status)) {
525 tevent_req_nterror(req, status);
529 tevent_req_done(req);
533 * Get the result out from an echo request
534 * @param[in] req The async_req from cli_echo_send
535 * @retval Did the server reply correctly?
538 NTSTATUS cli_echo_recv(struct tevent_req *req)
540 return tevent_req_simple_recv_ntstatus(req);
544 * @brief Send/Receive SMBEcho requests
545 * @param[in] mem_ctx The memory context to put the async_req on
546 * @param[in] ev The event context that will call us back
547 * @param[in] cli The connection to send the echo to
548 * @param[in] num_echos How many times do we want to get the reply?
549 * @param[in] data The data we want to get back
550 * @retval Did the server reply correctly?
553 NTSTATUS cli_echo(struct cli_state *cli, uint16_t num_echos, DATA_BLOB data)
555 TALLOC_CTX *frame = talloc_stackframe();
556 struct tevent_context *ev;
557 struct tevent_req *req;
558 NTSTATUS status = NT_STATUS_OK;
560 if (smbXcli_conn_has_async_calls(cli->conn)) {
562 * Can't use sync call while an async call is in flight
564 status = NT_STATUS_INVALID_PARAMETER;
568 ev = samba_tevent_context_init(frame);
570 status = NT_STATUS_NO_MEMORY;
574 req = cli_echo_send(frame, ev, cli, num_echos, data);
576 status = NT_STATUS_NO_MEMORY;
580 if (!tevent_req_poll_ntstatus(req, ev, &status)) {
584 status = cli_echo_recv(req);
591 * Is the SMB command able to hold an AND_X successor
592 * @param[in] cmd The SMB command in question
593 * @retval Can we add a chained request after "cmd"?
595 bool is_andx_req(uint8_t cmd)
615 NTSTATUS cli_smb(TALLOC_CTX *mem_ctx, struct cli_state *cli,
616 uint8_t smb_command, uint8_t additional_flags,
617 uint8_t wct, uint16_t *vwv,
618 uint32_t num_bytes, const uint8_t *bytes,
619 struct tevent_req **result_parent,
620 uint8_t min_wct, uint8_t *pwct, uint16_t **pvwv,
621 uint32_t *pnum_bytes, uint8_t **pbytes)
623 struct tevent_context *ev;
624 struct tevent_req *req = NULL;
625 NTSTATUS status = NT_STATUS_NO_MEMORY;
627 if (smbXcli_conn_has_async_calls(cli->conn)) {
628 return NT_STATUS_INVALID_PARAMETER;
630 ev = samba_tevent_context_init(mem_ctx);
634 req = cli_smb_send(mem_ctx, ev, cli, smb_command, additional_flags, 0,
635 wct, vwv, num_bytes, bytes);
639 if (!tevent_req_poll_ntstatus(req, ev, &status)) {
642 status = cli_smb_recv(req, NULL, NULL, min_wct, pwct, pvwv,
646 if (NT_STATUS_IS_OK(status) && (result_parent != NULL)) {
647 *result_parent = req;