source: trunk/server/source3/libsmb/clientgen.c@ 646

Last change on this file since 646 was 646, checked in by Silvan Scherrer, 14 years ago

Samba Server 3.5: some small adjustments and unneeded function removed
File size: 25.4 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 SMB client generic functions
4 Copyright (C) Andrew Tridgell 1994-1998
5 Copyright (C) Jeremy Allison 2007.
6
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.
11
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.
16
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/>.
19*/
20
21#include "includes.h"
22
23/*******************************************************************
24 Setup the word count and byte count for a client smb message.
25********************************************************************/
26
27int cli_set_message(char *buf,int num_words,int num_bytes,bool zero)
28{
29 if (zero && (num_words || num_bytes)) {
30 memset(buf + smb_size,'\0',num_words*2 + num_bytes);
31 }
32 SCVAL(buf,smb_wct,num_words);
33 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
34 smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
35 return (smb_size + num_words*2 + num_bytes);
36}
37
38/****************************************************************************
39 Change the timeout (in milliseconds).
40****************************************************************************/
41
42unsigned int cli_set_timeout(struct cli_state *cli, unsigned int timeout)
43{
44 unsigned int old_timeout = cli->timeout;
45 cli->timeout = timeout;
46 return old_timeout;
47}
48
49/****************************************************************************
50 Change the port number used to call on.
51****************************************************************************/
52
53void cli_set_port(struct cli_state *cli, int port)
54{
55 cli->port = port;
56}
57
58/****************************************************************************
59 convenience routine to find if we negotiated ucs2
60****************************************************************************/
61
62bool cli_ucs2(struct cli_state *cli)
63{
64 return ((cli->capabilities & CAP_UNICODE) != 0);
65}
66
67
68/****************************************************************************
69 Read an smb from a fd ignoring all keepalive packets.
70 The timeout is in milliseconds
71
72 This is exactly the same as receive_smb except that it never returns
73 a session keepalive packet (just as receive_smb used to do).
74 receive_smb was changed to return keepalives as the oplock processing means this call
75 should never go into a blocking read.
76****************************************************************************/
77
78static ssize_t client_receive_smb(struct cli_state *cli, size_t maxlen)
79{
80 size_t len;
81
82 for(;;) {
83 NTSTATUS status;
84
85 set_smb_read_error(&cli->smb_rw_error, SMB_READ_OK);
86
87 status = receive_smb_raw(cli->fd, cli->inbuf, cli->bufsize,
88 cli->timeout, maxlen, &len);
89 if (!NT_STATUS_IS_OK(status)) {
90 DEBUG(10,("client_receive_smb failed\n"));
91 show_msg(cli->inbuf);
92
93 if (NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)) {
94 set_smb_read_error(&cli->smb_rw_error,
95 SMB_READ_EOF);
96 return -1;
97 }
98
99 if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT)) {
100 set_smb_read_error(&cli->smb_rw_error,
101 SMB_READ_TIMEOUT);
102 return -1;
103 }
104
105 set_smb_read_error(&cli->smb_rw_error, SMB_READ_ERROR);
106 return -1;
107 }
108
109 /*
110 * I don't believe len can be < 0 with NT_STATUS_OK
111 * returned above, but this check doesn't hurt. JRA.
112 */
113
114 if ((ssize_t)len < 0) {
115 return len;
116 }
117
118 /* Ignore session keepalive packets. */
119 if(CVAL(cli->inbuf,0) != SMBkeepalive) {
120 break;
121 }
122 }
123
124 if (cli_encryption_on(cli)) {
125 NTSTATUS status = cli_decrypt_message(cli);
126 if (!NT_STATUS_IS_OK(status)) {
127 DEBUG(0, ("SMB decryption failed on incoming packet! Error %s\n",
128 nt_errstr(status)));
129 cli->smb_rw_error = SMB_READ_BAD_DECRYPT;
130 return -1;
131 }
132 }
133
134 show_msg(cli->inbuf);
135 return len;
136}
137
138static bool cli_state_set_seqnum(struct cli_state *cli, uint16_t mid, uint32_t seqnum)
139{
140 struct cli_state_seqnum *c;
141
142 for (c = cli->seqnum; c; c = c->next) {
143 if (c->mid == mid) {
144 c->seqnum = seqnum;
145 return true;
146 }
147 }
148
149 c = talloc_zero(cli, struct cli_state_seqnum);
150 if (!c) {
151 return false;
152 }
153
154 c->mid = mid;
155 c->seqnum = seqnum;
156 c->persistent = false;
157 DLIST_ADD_END(cli->seqnum, c, struct cli_state_seqnum *);
158
159 return true;
160}
161
162bool cli_state_seqnum_persistent(struct cli_state *cli,
163 uint16_t mid)
164{
165 struct cli_state_seqnum *c;
166
167 for (c = cli->seqnum; c; c = c->next) {
168 if (c->mid == mid) {
169 c->persistent = true;
170 return true;
171 }
172 }
173
174 return false;
175}
176
177bool cli_state_seqnum_remove(struct cli_state *cli,
178 uint16_t mid)
179{
180 struct cli_state_seqnum *c;
181
182 for (c = cli->seqnum; c; c = c->next) {
183 if (c->mid == mid) {
184 DLIST_REMOVE(cli->seqnum, c);
185 TALLOC_FREE(c);
186 return true;
187 }
188 }
189
190 return false;
191}
192
193static uint32_t cli_state_get_seqnum(struct cli_state *cli, uint16_t mid)
194{
195 struct cli_state_seqnum *c;
196
197 for (c = cli->seqnum; c; c = c->next) {
198 if (c->mid == mid) {
199 uint32_t seqnum = c->seqnum;
200 if (!c->persistent) {
201 DLIST_REMOVE(cli->seqnum, c);
202 TALLOC_FREE(c);
203 }
204 return seqnum;
205 }
206 }
207
208 return 0;
209}
210
211/****************************************************************************
212 Recv an smb.
213****************************************************************************/
214
215bool cli_receive_smb(struct cli_state *cli)
216{
217 ssize_t len;
218 uint16_t mid;
219 uint32_t seqnum;
220
221 /* fd == -1 causes segfaults -- Tom (tom@ninja.nl) */
222 if (cli->fd == -1)
223 return false;
224
225 again:
226 len = client_receive_smb(cli, 0);
227
228 if (len > 0) {
229 /* it might be an oplock break request */
230 if (!(CVAL(cli->inbuf, smb_flg) & FLAG_REPLY) &&
231 CVAL(cli->inbuf,smb_com) == SMBlockingX &&
232 SVAL(cli->inbuf,smb_vwv6) == 0 &&
233 SVAL(cli->inbuf,smb_vwv7) == 0) {
234 if (cli->oplock_handler) {
235 int fnum = SVAL(cli->inbuf,smb_vwv2);
236 unsigned char level = CVAL(cli->inbuf,smb_vwv3+1);
237 if (!NT_STATUS_IS_OK(cli->oplock_handler(cli, fnum, level))) {
238 return false;
239 }
240 }
241 /* try to prevent loops */
242 SCVAL(cli->inbuf,smb_com,0xFF);
243 goto again;
244 }
245 }
246
247 /* If the server is not responding, note that now */
248 if (len < 0) {
249 DEBUG(0, ("Receiving SMB: Server stopped responding\n"));
250 close(cli->fd);
251 cli->fd = -1;
252 return false;
253 }
254
255 mid = SVAL(cli->inbuf,smb_mid);
256 seqnum = cli_state_get_seqnum(cli, mid);
257
258 if (!cli_check_sign_mac(cli, cli->inbuf, seqnum+1)) {
259 /*
260 * If we get a signature failure in sessionsetup, then
261 * the server sometimes just reflects the sent signature
262 * back to us. Detect this and allow the upper layer to
263 * retrieve the correct Windows error message.
264 */
265 if (CVAL(cli->outbuf,smb_com) == SMBsesssetupX &&
266 (smb_len(cli->inbuf) > (smb_ss_field + 8 - 4)) &&
267 (SVAL(cli->inbuf,smb_flg2) & FLAGS2_SMB_SECURITY_SIGNATURES) &&
268 memcmp(&cli->outbuf[smb_ss_field],&cli->inbuf[smb_ss_field],8) == 0 &&
269 cli_is_error(cli)) {
270
271 /*
272 * Reflected signature on login error.
273 * Set bad sig but don't close fd.
274 */
275 cli->smb_rw_error = SMB_READ_BAD_SIG;
276 return true;
277 }
278
279 DEBUG(0, ("SMB Signature verification failed on incoming packet!\n"));
280 cli->smb_rw_error = SMB_READ_BAD_SIG;
281 close(cli->fd);
282 cli->fd = -1;
283 return false;
284 };
285 return true;
286}
287
288/****************************************************************************
289 Read the data portion of a readX smb.
290 The timeout is in milliseconds
291****************************************************************************/
292
293ssize_t cli_receive_smb_data(struct cli_state *cli, char *buffer, size_t len)
294{
295 NTSTATUS status;
296
297 set_smb_read_error(&cli->smb_rw_error, SMB_READ_OK);
298
299 status = read_fd_with_timeout(
300 cli->fd, buffer, len, len, cli->timeout, NULL);
301 if (NT_STATUS_IS_OK(status)) {
302 return len;
303 }
304
305 if (NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)) {
306 set_smb_read_error(&cli->smb_rw_error, SMB_READ_EOF);
307 return -1;
308 }
309
310 if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT)) {
311 set_smb_read_error(&cli->smb_rw_error, SMB_READ_TIMEOUT);
312 return -1;
313 }
314
315 set_smb_read_error(&cli->smb_rw_error, SMB_READ_ERROR);
316 return -1;
317}
318
319static ssize_t write_socket(int fd, const char *buf, size_t len)
320{
321 ssize_t ret=0;
322
323 DEBUG(6,("write_socket(%d,%d)\n",fd,(int)len));
324 ret = write_data(fd,buf,len);
325
326 DEBUG(6,("write_socket(%d,%d) wrote %d\n",fd,(int)len,(int)ret));
327 if(ret <= 0)
328 DEBUG(0,("write_socket: Error writing %d bytes to socket %d: ERRNO = %s\n",
329 (int)len, fd, strerror(errno) ));
330
331 return(ret);
332}
333
334/****************************************************************************
335 Send an smb to a fd.
336****************************************************************************/
337
338bool cli_send_smb(struct cli_state *cli)
339{
340 size_t len;
341 size_t nwritten=0;
342 ssize_t ret;
343 char *buf_out = cli->outbuf;
344 bool enc_on = cli_encryption_on(cli);
345 uint32_t seqnum;
346
347 /* fd == -1 causes segfaults -- Tom (tom@ninja.nl) */
348 if (cli->fd == -1)
349 return false;
350
351 cli_calculate_sign_mac(cli, cli->outbuf, &seqnum);
352
353 if (!cli_state_set_seqnum(cli, cli->mid, seqnum)) {
354 DEBUG(0,("Failed to store mid[%u]/seqnum[%u]\n",
355 (unsigned int)cli->mid,
356 (unsigned int)seqnum));
357 return false;
358 }
359
360 if (enc_on) {
361 NTSTATUS status = cli_encrypt_message(cli, cli->outbuf,
362 &buf_out);
363 if (!NT_STATUS_IS_OK(status)) {
364 close(cli->fd);
365 cli->fd = -1;
366 cli->smb_rw_error = SMB_WRITE_ERROR;
367 DEBUG(0,("Error in encrypting client message. Error %s\n",
368 nt_errstr(status) ));
369 return false;
370 }
371 }
372
373 len = smb_len(buf_out) + 4;
374
375 while (nwritten < len) {
376 ret = write_socket(cli->fd,buf_out+nwritten,len - nwritten);
377 if (ret <= 0) {
378 if (enc_on) {
379 cli_free_enc_buffer(cli, buf_out);
380 }
381 close(cli->fd);
382 cli->fd = -1;
383 cli->smb_rw_error = SMB_WRITE_ERROR;
384 DEBUG(0,("Error writing %d bytes to client. %d (%s)\n",
385 (int)len,(int)ret, strerror(errno) ));
386 return false;
387 }
388 nwritten += ret;
389 }
390
391 if (enc_on) {
392 cli_free_enc_buffer(cli, buf_out);
393 }
394
395 /* Increment the mid so we can tell between responses. */
396 cli->mid++;
397 if (!cli->mid)
398 cli->mid++;
399 return true;
400}
401
402/****************************************************************************
403 Send a "direct" writeX smb to a fd.
404****************************************************************************/
405
406bool cli_send_smb_direct_writeX(struct cli_state *cli,
407 const char *p,
408 size_t extradata)
409{
410 /* First length to send is the offset to the data. */
411 size_t len = SVAL(cli->outbuf,smb_vwv11) + 4;
412 size_t nwritten=0;
413 struct iovec iov[2];
414
415 /* fd == -1 causes segfaults -- Tom (tom@ninja.nl) */
416 if (cli->fd == -1) {
417 return false;
418 }
419
420 if (client_is_signing_on(cli)) {
421 DEBUG(0,("cli_send_smb_large: cannot send signed packet.\n"));
422 return false;
423 }
424
425 iov[0].iov_base = (void *)cli->outbuf;
426 iov[0].iov_len = len;
427 iov[1].iov_base = CONST_DISCARD(void *, p);
428 iov[1].iov_len = extradata;
429
430 nwritten = write_data_iov(cli->fd, iov, 2);
431 if (nwritten < (len + extradata)) {
432 close(cli->fd);
433 cli->fd = -1;
434 cli->smb_rw_error = SMB_WRITE_ERROR;
435 DEBUG(0,("Error writing %d bytes to client. (%s)\n",
436 (int)(len+extradata), strerror(errno)));
437printf("@remove me, %d bytes written, %d + %d bytes reqested\n", nwritten, len, extradata);
438 return false;
439 }
440
441 /* Increment the mid so we can tell between responses. */
442 cli->mid++;
443 if (!cli->mid)
444 cli->mid++;
445 return true;
446}
447
448/****************************************************************************
449 Setup basics in a outgoing packet.
450****************************************************************************/
451
452void cli_setup_packet_buf(struct cli_state *cli, char *buf)
453{
454 uint16 flags2;
455 cli->rap_error = 0;
456 SIVAL(buf,smb_rcls,0);
457 SSVAL(buf,smb_pid,cli->pid);
458 memset(buf+smb_pidhigh, 0, 12);
459 SSVAL(buf,smb_uid,cli->vuid);
460 SSVAL(buf,smb_mid,cli->mid);
461
462 if (cli->protocol <= PROTOCOL_CORE) {
463 return;
464 }
465
466 if (cli->case_sensitive) {
467 SCVAL(buf,smb_flg,0x0);
468 } else {
469 /* Default setting, case insensitive. */
470 SCVAL(buf,smb_flg,0x8);
471 }
472 flags2 = FLAGS2_LONG_PATH_COMPONENTS;
473 if (cli->capabilities & CAP_UNICODE)
474 flags2 |= FLAGS2_UNICODE_STRINGS;
475 if ((cli->capabilities & CAP_DFS) && cli->dfsroot)
476 flags2 |= FLAGS2_DFS_PATHNAMES;
477 if (cli->capabilities & CAP_STATUS32)
478 flags2 |= FLAGS2_32_BIT_ERROR_CODES;
479 if (cli->use_spnego)
480 flags2 |= FLAGS2_EXTENDED_SECURITY;
481 SSVAL(buf,smb_flg2, flags2);
482}
483
484void cli_setup_packet(struct cli_state *cli)
485{
486 cli_setup_packet_buf(cli, cli->outbuf);
487}
488
489/****************************************************************************
490 Setup the bcc length of the packet from a pointer to the end of the data.
491****************************************************************************/
492
493void cli_setup_bcc(struct cli_state *cli, void *p)
494{
495 set_message_bcc(cli->outbuf, PTR_DIFF(p, smb_buf(cli->outbuf)));
496}
497
498/****************************************************************************
499 Initialize Domain, user or password.
500****************************************************************************/
501
502NTSTATUS cli_set_domain(struct cli_state *cli, const char *domain)
503{
504 TALLOC_FREE(cli->domain);
505 cli->domain = talloc_strdup(cli, domain ? domain : "");
506 if (cli->domain == NULL) {
507 return NT_STATUS_NO_MEMORY;
508 }
509 return NT_STATUS_OK;
510}
511
512NTSTATUS cli_set_username(struct cli_state *cli, const char *username)
513{
514 TALLOC_FREE(cli->user_name);
515 cli->user_name = talloc_strdup(cli, username ? username : "");
516 if (cli->user_name == NULL) {
517 return NT_STATUS_NO_MEMORY;
518 }
519 return NT_STATUS_OK;
520}
521
522NTSTATUS cli_set_password(struct cli_state *cli, const char *password)
523{
524 TALLOC_FREE(cli->password);
525
526 /* Password can be NULL. */
527 if (password) {
528 cli->password = talloc_strdup(cli, password);
529 if (cli->password == NULL) {
530 return NT_STATUS_NO_MEMORY;
531 }
532 } else {
533 /* Use zero NTLMSSP hashes and session key. */
534 cli->password = NULL;
535 }
536
537 return NT_STATUS_OK;
538}
539
540/****************************************************************************
541 Initialise credentials of a client structure.
542****************************************************************************/
543
544NTSTATUS cli_init_creds(struct cli_state *cli, const char *username, const char *domain, const char *password)
545{
546 NTSTATUS status = cli_set_username(cli, username);
547 if (!NT_STATUS_IS_OK(status)) {
548 return status;
549 }
550 status = cli_set_domain(cli, domain);
551 if (!NT_STATUS_IS_OK(status)) {
552 return status;
553 }
554 DEBUG(10,("cli_init_creds: user %s domain %s\n", cli->user_name, cli->domain));
555
556 return cli_set_password(cli, password);
557}
558
559/****************************************************************************
560 Initialise a client structure. Always returns a talloc'ed struct.
561 Set the signing state (used from the command line).
562****************************************************************************/
563
564struct cli_state *cli_initialise_ex(int signing_state)
565{
566 struct cli_state *cli = NULL;
567 bool allow_smb_signing = false;
568 bool mandatory_signing = false;
569
570#ifndef __OS2__
571 /* Check the effective uid - make sure we are not setuid */
572 if (is_setuid_root()) {
573 DEBUG(0,("libsmb based programs must *NOT* be setuid root.\n"));
574 return NULL;
575 }
576#endif
577
578 cli = TALLOC_ZERO_P(NULL, struct cli_state);
579 if (!cli) {
580 return NULL;
581 }
582
583 cli->dfs_mountpoint = talloc_strdup(cli, "");
584 if (!cli->dfs_mountpoint) {
585 goto error;
586 }
587 cli->port = 0;
588 cli->fd = -1;
589 cli->cnum = -1;
590 cli->pid = (uint16)sys_getpid();
591 cli->mid = 1;
592 cli->vuid = UID_FIELD_INVALID;
593 cli->protocol = PROTOCOL_NT1;
594 cli->timeout = 20000; /* Timeout is in milliseconds. */
595 cli->bufsize = CLI_BUFFER_SIZE+4;
596 cli->max_xmit = cli->bufsize;
597 cli->outbuf = (char *)SMB_MALLOC(cli->bufsize+SAFETY_MARGIN);
598 cli->seqnum = 0;
599 cli->inbuf = (char *)SMB_MALLOC(cli->bufsize+SAFETY_MARGIN);
600 cli->oplock_handler = cli_oplock_ack;
601 cli->case_sensitive = false;
602 cli->smb_rw_error = SMB_READ_OK;
603
604 cli->use_spnego = lp_client_use_spnego();
605
606 cli->capabilities = CAP_UNICODE | CAP_STATUS32 | CAP_DFS;
607
608 /* Set the CLI_FORCE_DOSERR environment variable to test
609 client routines using DOS errors instead of STATUS32
610 ones. This intended only as a temporary hack. */
611 if (getenv("CLI_FORCE_DOSERR"))
612 cli->force_dos_errors = true;
613
614 if (lp_client_signing()) {
615 allow_smb_signing = true;
616 }
617
618 if (lp_client_signing() == Required) {
619 mandatory_signing = true;
620 }
621
622 if (signing_state != Undefined) {
623 allow_smb_signing = true;
624 }
625
626 if (signing_state == false) {
627 allow_smb_signing = false;
628 mandatory_signing = false;
629 }
630
631 if (signing_state == Required) {
632 mandatory_signing = true;
633 }
634
635 if (!cli->outbuf || !cli->inbuf)
636 goto error;
637
638 memset(cli->outbuf, 0, cli->bufsize);
639 memset(cli->inbuf, 0, cli->bufsize);
640
641
642#if defined(DEVELOPER)
643 /* just because we over-allocate, doesn't mean it's right to use it */
644 clobber_region(FUNCTION_MACRO, __LINE__, cli->outbuf+cli->bufsize, SAFETY_MARGIN);
645 clobber_region(FUNCTION_MACRO, __LINE__, cli->inbuf+cli->bufsize, SAFETY_MARGIN);
646#endif
647
648 /* initialise signing */
649 cli->signing_state = smb_signing_init(cli,
650 allow_smb_signing,
651 mandatory_signing);
652 if (!cli->signing_state) {
653 goto error;
654 }
655
656 cli->outgoing = tevent_queue_create(cli, "cli_outgoing");
657 if (cli->outgoing == NULL) {
658 goto error;
659 }
660 cli->pending = NULL;
661
662 cli->initialised = 1;
663
664 return cli;
665
666 /* Clean up after malloc() error */
667
668 error:
669
670 SAFE_FREE(cli->inbuf);
671 SAFE_FREE(cli->outbuf);
672 TALLOC_FREE(cli);
673 return NULL;
674}
675
676struct cli_state *cli_initialise(void)
677{
678 return cli_initialise_ex(Undefined);
679}
680
681/****************************************************************************
682 Close all pipes open on this session.
683****************************************************************************/
684
685void cli_nt_pipes_close(struct cli_state *cli)
686{
687 while (cli->pipe_list != NULL) {
688 /*
689 * No TALLOC_FREE here!
690 */
691 talloc_free(cli->pipe_list);
692 }
693}
694
695/****************************************************************************
696 Shutdown a client structure.
697****************************************************************************/
698
699void cli_shutdown(struct cli_state *cli)
700{
701 if (cli == NULL) {
702 return;
703 }
704
705 if (cli->prev == NULL) {
706 /*
707 * Possible head of a DFS list,
708 * shutdown all subsidiary DFS
709 * connections.
710 */
711 struct cli_state *p, *next;
712
713 for (p = cli->next; p; p = next) {
714 next = p->next;
715 cli_shutdown(p);
716 }
717 } else {
718 /*
719 * We're a subsidiary connection.
720 * Just remove ourselves from the
721 * DFS list.
722 */
723 DLIST_REMOVE(cli->prev, cli);
724 }
725
726 cli_nt_pipes_close(cli);
727
728 /*
729 * tell our peer to free his resources. Wihtout this, when an
730 * application attempts to do a graceful shutdown and calls
731 * smbc_free_context() to clean up all connections, some connections
732 * can remain active on the peer end, until some (long) timeout period
733 * later. This tree disconnect forces the peer to clean up, since the
734 * connection will be going away.
735 *
736 * Also, do not do tree disconnect when cli->smb_rw_error is SMB_DO_NOT_DO_TDIS
737 * the only user for this so far is smbmount which passes opened connection
738 * down to kernel's smbfs module.
739 */
740 if ( (cli->cnum != (uint16)-1) && (cli->smb_rw_error != SMB_DO_NOT_DO_TDIS ) ) {
741 cli_tdis(cli);
742 }
743
744 SAFE_FREE(cli->outbuf);
745 SAFE_FREE(cli->inbuf);
746
747 data_blob_free(&cli->secblob);
748 data_blob_free(&cli->user_session_key);
749
750 if (cli->fd != -1) {
751 close(cli->fd);
752 }
753 cli->fd = -1;
754 cli->smb_rw_error = SMB_READ_OK;
755
756 /*
757 * Need to free pending first, they remove themselves
758 */
759 while (cli->pending) {
760 talloc_free(cli->pending[0]);
761 }
762 TALLOC_FREE(cli);
763}
764
765/****************************************************************************
766 Set socket options on a open connection.
767****************************************************************************/
768
769void cli_sockopt(struct cli_state *cli, const char *options)
770{
771 set_socket_options(cli->fd, options);
772}
773
774/****************************************************************************
775 Set the PID to use for smb messages. Return the old pid.
776****************************************************************************/
777
778uint16 cli_setpid(struct cli_state *cli, uint16 pid)
779{
780 uint16 ret = cli->pid;
781 cli->pid = pid;
782 return ret;
783}
784
785/****************************************************************************
786 Set the case sensitivity flag on the packets. Returns old state.
787****************************************************************************/
788
789bool cli_set_case_sensitive(struct cli_state *cli, bool case_sensitive)
790{
791 bool ret = cli->case_sensitive;
792 cli->case_sensitive = case_sensitive;
793 return ret;
794}
795
796/****************************************************************************
797Send a keepalive packet to the server
798****************************************************************************/
799
800bool cli_send_keepalive(struct cli_state *cli)
801{
802 if (cli->fd == -1) {
803 DEBUG(3, ("cli_send_keepalive: fd == -1\n"));
804 return false;
805 }
806 if (!send_keepalive(cli->fd)) {
807 close(cli->fd);
808 cli->fd = -1;
809 DEBUG(0,("Error sending keepalive packet to client.\n"));
810 return false;
811 }
812 return true;
813}
814
815struct cli_echo_state {
816 uint16_t vwv[1];
817 DATA_BLOB data;
818 int num_echos;
819};
820
821static void cli_echo_done(struct tevent_req *subreq);
822
823struct tevent_req *cli_echo_send(TALLOC_CTX *mem_ctx, struct event_context *ev,
824 struct cli_state *cli, uint16_t num_echos,
825 DATA_BLOB data)
826{
827 struct tevent_req *req, *subreq;
828 struct cli_echo_state *state;
829
830 req = tevent_req_create(mem_ctx, &state, struct cli_echo_state);
831 if (req == NULL) {
832 return NULL;
833 }
834 SSVAL(state->vwv, 0, num_echos);
835 state->data = data;
836 state->num_echos = num_echos;
837
838 subreq = cli_smb_send(state, ev, cli, SMBecho, 0, 1, state->vwv,
839 data.length, data.data);
840 if (subreq == NULL) {
841 goto fail;
842 }
843 tevent_req_set_callback(subreq, cli_echo_done, req);
844 return req;
845 fail:
846 TALLOC_FREE(req);
847 return NULL;
848}
849
850static void cli_echo_done(struct tevent_req *subreq)
851{
852 struct tevent_req *req = tevent_req_callback_data(
853 subreq, struct tevent_req);
854 struct cli_echo_state *state = tevent_req_data(
855 req, struct cli_echo_state);
856 NTSTATUS status;
857 uint32_t num_bytes;
858 uint8_t *bytes;
859
860 status = cli_smb_recv(subreq, 0, NULL, NULL, &num_bytes, &bytes);
861 if (!NT_STATUS_IS_OK(status)) {
862 tevent_req_nterror(req, status);
863 return;
864 }
865 if ((num_bytes != state->data.length)
866 || (memcmp(bytes, state->data.data, num_bytes) != 0)) {
867 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
868 return;
869 }
870
871 state->num_echos -=1;
872 if (state->num_echos == 0) {
873 tevent_req_done(req);
874 return;
875 }
876
877 if (!cli_smb_req_set_pending(subreq)) {
878 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
879 return;
880 }
881}
882
883/**
884 * Get the result out from an echo request
885 * @param[in] req The async_req from cli_echo_send
886 * @retval Did the server reply correctly?
887 */
888
889NTSTATUS cli_echo_recv(struct tevent_req *req)
890{
891 return tevent_req_simple_recv_ntstatus(req);
892}
893
894/**
895 * @brief Send/Receive SMBEcho requests
896 * @param[in] mem_ctx The memory context to put the async_req on
897 * @param[in] ev The event context that will call us back
898 * @param[in] cli The connection to send the echo to
899 * @param[in] num_echos How many times do we want to get the reply?
900 * @param[in] data The data we want to get back
901 * @retval Did the server reply correctly?
902 */
903
904NTSTATUS cli_echo(struct cli_state *cli, uint16_t num_echos, DATA_BLOB data)
905{
906 TALLOC_CTX *frame = talloc_stackframe();
907 struct event_context *ev;
908 struct tevent_req *req;
909 NTSTATUS status = NT_STATUS_OK;
910
911 if (cli_has_async_calls(cli)) {
912 /*
913 * Can't use sync call while an async call is in flight
914 */
915 status = NT_STATUS_INVALID_PARAMETER;
916 goto fail;
917 }
918
919 ev = event_context_init(frame);
920 if (ev == NULL) {
921 status = NT_STATUS_NO_MEMORY;
922 goto fail;
923 }
924
925 req = cli_echo_send(frame, ev, cli, num_echos, data);
926 if (req == NULL) {
927 status = NT_STATUS_NO_MEMORY;
928 goto fail;
929 }
930
931 if (!tevent_req_poll(req, ev)) {
932 status = map_nt_error_from_unix(errno);
933 goto fail;
934 }
935
936 status = cli_echo_recv(req);
937 fail:
938 TALLOC_FREE(frame);
939 if (!NT_STATUS_IS_OK(status)) {
940 cli_set_error(cli, status);
941 }
942 return status;
943}
944
945/**
946 * Is the SMB command able to hold an AND_X successor
947 * @param[in] cmd The SMB command in question
948 * @retval Can we add a chained request after "cmd"?
949 */
950bool is_andx_req(uint8_t cmd)
951{
952 switch (cmd) {
953 case SMBtconX:
954 case SMBlockingX:
955 case SMBopenX:
956 case SMBreadX:
957 case SMBwriteX:
958 case SMBsesssetupX:
959 case SMBulogoffX:
960 case SMBntcreateX:
961 return true;
962 break;
963 default:
964 break;
965 }
966
967 return false;
968}
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