source: branches/samba-3.5.x/source3/libsmb/clientgen.c@ 738

Last change on this file since 738 was 656, checked in by Herwig Bauernfeind, 14 years ago

Samba Server 3.5: Some more work to get high-mem working
File size: 25.3 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)));
437 return false;
438 }
439
440 /* Increment the mid so we can tell between responses. */
441 cli->mid++;
442 if (!cli->mid)
443 cli->mid++;
444 return true;
445}
446
447/****************************************************************************
448 Setup basics in a outgoing packet.
449****************************************************************************/
450
451void cli_setup_packet_buf(struct cli_state *cli, char *buf)
452{
453 uint16 flags2;
454 cli->rap_error = 0;
455 SIVAL(buf,smb_rcls,0);
456 SSVAL(buf,smb_pid,cli->pid);
457 memset(buf+smb_pidhigh, 0, 12);
458 SSVAL(buf,smb_uid,cli->vuid);
459 SSVAL(buf,smb_mid,cli->mid);
460
461 if (cli->protocol <= PROTOCOL_CORE) {
462 return;
463 }
464
465 if (cli->case_sensitive) {
466 SCVAL(buf,smb_flg,0x0);
467 } else {
468 /* Default setting, case insensitive. */
469 SCVAL(buf,smb_flg,0x8);
470 }
471 flags2 = FLAGS2_LONG_PATH_COMPONENTS;
472 if (cli->capabilities & CAP_UNICODE)
473 flags2 |= FLAGS2_UNICODE_STRINGS;
474 if ((cli->capabilities & CAP_DFS) && cli->dfsroot)
475 flags2 |= FLAGS2_DFS_PATHNAMES;
476 if (cli->capabilities & CAP_STATUS32)
477 flags2 |= FLAGS2_32_BIT_ERROR_CODES;
478 if (cli->use_spnego)
479 flags2 |= FLAGS2_EXTENDED_SECURITY;
480 SSVAL(buf,smb_flg2, flags2);
481}
482
483void cli_setup_packet(struct cli_state *cli)
484{
485 cli_setup_packet_buf(cli, cli->outbuf);
486}
487
488/****************************************************************************
489 Setup the bcc length of the packet from a pointer to the end of the data.
490****************************************************************************/
491
492void cli_setup_bcc(struct cli_state *cli, void *p)
493{
494 set_message_bcc(cli->outbuf, PTR_DIFF(p, smb_buf(cli->outbuf)));
495}
496
497/****************************************************************************
498 Initialize Domain, user or password.
499****************************************************************************/
500
501NTSTATUS cli_set_domain(struct cli_state *cli, const char *domain)
502{
503 TALLOC_FREE(cli->domain);
504 cli->domain = talloc_strdup(cli, domain ? domain : "");
505 if (cli->domain == NULL) {
506 return NT_STATUS_NO_MEMORY;
507 }
508 return NT_STATUS_OK;
509}
510
511NTSTATUS cli_set_username(struct cli_state *cli, const char *username)
512{
513 TALLOC_FREE(cli->user_name);
514 cli->user_name = talloc_strdup(cli, username ? username : "");
515 if (cli->user_name == NULL) {
516 return NT_STATUS_NO_MEMORY;
517 }
518 return NT_STATUS_OK;
519}
520
521NTSTATUS cli_set_password(struct cli_state *cli, const char *password)
522{
523 TALLOC_FREE(cli->password);
524
525 /* Password can be NULL. */
526 if (password) {
527 cli->password = talloc_strdup(cli, password);
528 if (cli->password == NULL) {
529 return NT_STATUS_NO_MEMORY;
530 }
531 } else {
532 /* Use zero NTLMSSP hashes and session key. */
533 cli->password = NULL;
534 }
535
536 return NT_STATUS_OK;
537}
538
539/****************************************************************************
540 Initialise credentials of a client structure.
541****************************************************************************/
542
543NTSTATUS cli_init_creds(struct cli_state *cli, const char *username, const char *domain, const char *password)
544{
545 NTSTATUS status = cli_set_username(cli, username);
546 if (!NT_STATUS_IS_OK(status)) {
547 return status;
548 }
549 status = cli_set_domain(cli, domain);
550 if (!NT_STATUS_IS_OK(status)) {
551 return status;
552 }
553 DEBUG(10,("cli_init_creds: user %s domain %s\n", cli->user_name, cli->domain));
554
555 return cli_set_password(cli, password);
556}
557
558/****************************************************************************
559 Initialise a client structure. Always returns a talloc'ed struct.
560 Set the signing state (used from the command line).
561****************************************************************************/
562
563struct cli_state *cli_initialise_ex(int signing_state)
564{
565 struct cli_state *cli = NULL;
566 bool allow_smb_signing = false;
567 bool mandatory_signing = false;
568
569#ifndef __OS2__
570 /* Check the effective uid - make sure we are not setuid */
571 if (is_setuid_root()) {
572 DEBUG(0,("libsmb based programs must *NOT* be setuid root.\n"));
573 return NULL;
574 }
575#endif
576
577 cli = TALLOC_ZERO_P(NULL, struct cli_state);
578 if (!cli) {
579 return NULL;
580 }
581
582 cli->dfs_mountpoint = talloc_strdup(cli, "");
583 if (!cli->dfs_mountpoint) {
584 goto error;
585 }
586 cli->port = 0;
587 cli->fd = -1;
588 cli->cnum = -1;
589 cli->pid = (uint16)sys_getpid();
590 cli->mid = 1;
591 cli->vuid = UID_FIELD_INVALID;
592 cli->protocol = PROTOCOL_NT1;
593 cli->timeout = 20000; /* Timeout is in milliseconds. */
594 cli->bufsize = CLI_BUFFER_SIZE+4;
595 cli->max_xmit = cli->bufsize;
596 cli->outbuf = (char *)SMB_MALLOC(cli->bufsize+SAFETY_MARGIN);
597 cli->seqnum = 0;
598 cli->inbuf = (char *)SMB_MALLOC(cli->bufsize+SAFETY_MARGIN);
599 cli->oplock_handler = cli_oplock_ack;
600 cli->case_sensitive = false;
601 cli->smb_rw_error = SMB_READ_OK;
602
603 cli->use_spnego = lp_client_use_spnego();
604
605 cli->capabilities = CAP_UNICODE | CAP_STATUS32 | CAP_DFS;
606
607 /* Set the CLI_FORCE_DOSERR environment variable to test
608 client routines using DOS errors instead of STATUS32
609 ones. This intended only as a temporary hack. */
610 if (getenv("CLI_FORCE_DOSERR"))
611 cli->force_dos_errors = true;
612
613 if (lp_client_signing()) {
614 allow_smb_signing = true;
615 }
616
617 if (lp_client_signing() == Required) {
618 mandatory_signing = true;
619 }
620
621 if (signing_state != Undefined) {
622 allow_smb_signing = true;
623 }
624
625 if (signing_state == false) {
626 allow_smb_signing = false;
627 mandatory_signing = false;
628 }
629
630 if (signing_state == Required) {
631 mandatory_signing = true;
632 }
633
634 if (!cli->outbuf || !cli->inbuf)
635 goto error;
636
637 memset(cli->outbuf, 0, cli->bufsize);
638 memset(cli->inbuf, 0, cli->bufsize);
639
640
641#if defined(DEVELOPER)
642 /* just because we over-allocate, doesn't mean it's right to use it */
643 clobber_region(FUNCTION_MACRO, __LINE__, cli->outbuf+cli->bufsize, SAFETY_MARGIN);
644 clobber_region(FUNCTION_MACRO, __LINE__, cli->inbuf+cli->bufsize, SAFETY_MARGIN);
645#endif
646
647 /* initialise signing */
648 cli->signing_state = smb_signing_init(cli,
649 allow_smb_signing,
650 mandatory_signing);
651 if (!cli->signing_state) {
652 goto error;
653 }
654
655 cli->outgoing = tevent_queue_create(cli, "cli_outgoing");
656 if (cli->outgoing == NULL) {
657 goto error;
658 }
659 cli->pending = NULL;
660
661 cli->initialised = 1;
662
663 return cli;
664
665 /* Clean up after malloc() error */
666
667 error:
668
669 SAFE_FREE(cli->inbuf);
670 SAFE_FREE(cli->outbuf);
671 TALLOC_FREE(cli);
672 return NULL;
673}
674
675struct cli_state *cli_initialise(void)
676{
677 return cli_initialise_ex(Undefined);
678}
679
680/****************************************************************************
681 Close all pipes open on this session.
682****************************************************************************/
683
684void cli_nt_pipes_close(struct cli_state *cli)
685{
686 while (cli->pipe_list != NULL) {
687 /*
688 * No TALLOC_FREE here!
689 */
690 talloc_free(cli->pipe_list);
691 }
692}
693
694/****************************************************************************
695 Shutdown a client structure.
696****************************************************************************/
697
698void cli_shutdown(struct cli_state *cli)
699{
700 if (cli == NULL) {
701 return;
702 }
703
704 if (cli->prev == NULL) {
705 /*
706 * Possible head of a DFS list,
707 * shutdown all subsidiary DFS
708 * connections.
709 */
710 struct cli_state *p, *next;
711
712 for (p = cli->next; p; p = next) {
713 next = p->next;
714 cli_shutdown(p);
715 }
716 } else {
717 /*
718 * We're a subsidiary connection.
719 * Just remove ourselves from the
720 * DFS list.
721 */
722 DLIST_REMOVE(cli->prev, cli);
723 }
724
725 cli_nt_pipes_close(cli);
726
727 /*
728 * tell our peer to free his resources. Wihtout this, when an
729 * application attempts to do a graceful shutdown and calls
730 * smbc_free_context() to clean up all connections, some connections
731 * can remain active on the peer end, until some (long) timeout period
732 * later. This tree disconnect forces the peer to clean up, since the
733 * connection will be going away.
734 *
735 * Also, do not do tree disconnect when cli->smb_rw_error is SMB_DO_NOT_DO_TDIS
736 * the only user for this so far is smbmount which passes opened connection
737 * down to kernel's smbfs module.
738 */
739 if ( (cli->cnum != (uint16)-1) && (cli->smb_rw_error != SMB_DO_NOT_DO_TDIS ) ) {
740 cli_tdis(cli);
741 }
742
743 SAFE_FREE(cli->outbuf);
744 SAFE_FREE(cli->inbuf);
745
746 data_blob_free(&cli->secblob);
747 data_blob_free(&cli->user_session_key);
748
749 if (cli->fd != -1) {
750 close(cli->fd);
751 }
752 cli->fd = -1;
753 cli->smb_rw_error = SMB_READ_OK;
754
755 /*
756 * Need to free pending first, they remove themselves
757 */
758 while (cli->pending) {
759 talloc_free(cli->pending[0]);
760 }
761 TALLOC_FREE(cli);
762}
763
764/****************************************************************************
765 Set socket options on a open connection.
766****************************************************************************/
767
768void cli_sockopt(struct cli_state *cli, const char *options)
769{
770 set_socket_options(cli->fd, options);
771}
772
773/****************************************************************************
774 Set the PID to use for smb messages. Return the old pid.
775****************************************************************************/
776
777uint16 cli_setpid(struct cli_state *cli, uint16 pid)
778{
779 uint16 ret = cli->pid;
780 cli->pid = pid;
781 return ret;
782}
783
784/****************************************************************************
785 Set the case sensitivity flag on the packets. Returns old state.
786****************************************************************************/
787
788bool cli_set_case_sensitive(struct cli_state *cli, bool case_sensitive)
789{
790 bool ret = cli->case_sensitive;
791 cli->case_sensitive = case_sensitive;
792 return ret;
793}
794
795/****************************************************************************
796Send a keepalive packet to the server
797****************************************************************************/
798
799bool cli_send_keepalive(struct cli_state *cli)
800{
801 if (cli->fd == -1) {
802 DEBUG(3, ("cli_send_keepalive: fd == -1\n"));
803 return false;
804 }
805 if (!send_keepalive(cli->fd)) {
806 close(cli->fd);
807 cli->fd = -1;
808 DEBUG(0,("Error sending keepalive packet to client.\n"));
809 return false;
810 }
811 return true;
812}
813
814struct cli_echo_state {
815 uint16_t vwv[1];
816 DATA_BLOB data;
817 int num_echos;
818};
819
820static void cli_echo_done(struct tevent_req *subreq);
821
822struct tevent_req *cli_echo_send(TALLOC_CTX *mem_ctx, struct event_context *ev,
823 struct cli_state *cli, uint16_t num_echos,
824 DATA_BLOB data)
825{
826 struct tevent_req *req, *subreq;
827 struct cli_echo_state *state;
828
829 req = tevent_req_create(mem_ctx, &state, struct cli_echo_state);
830 if (req == NULL) {
831 return NULL;
832 }
833 SSVAL(state->vwv, 0, num_echos);
834 state->data = data;
835 state->num_echos = num_echos;
836
837 subreq = cli_smb_send(state, ev, cli, SMBecho, 0, 1, state->vwv,
838 data.length, data.data);
839 if (subreq == NULL) {
840 goto fail;
841 }
842 tevent_req_set_callback(subreq, cli_echo_done, req);
843 return req;
844 fail:
845 TALLOC_FREE(req);
846 return NULL;
847}
848
849static void cli_echo_done(struct tevent_req *subreq)
850{
851 struct tevent_req *req = tevent_req_callback_data(
852 subreq, struct tevent_req);
853 struct cli_echo_state *state = tevent_req_data(
854 req, struct cli_echo_state);
855 NTSTATUS status;
856 uint32_t num_bytes;
857 uint8_t *bytes;
858
859 status = cli_smb_recv(subreq, 0, NULL, NULL, &num_bytes, &bytes);
860 if (!NT_STATUS_IS_OK(status)) {
861 tevent_req_nterror(req, status);
862 return;
863 }
864 if ((num_bytes != state->data.length)
865 || (memcmp(bytes, state->data.data, num_bytes) != 0)) {
866 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
867 return;
868 }
869
870 state->num_echos -=1;
871 if (state->num_echos == 0) {
872 tevent_req_done(req);
873 return;
874 }
875
876 if (!cli_smb_req_set_pending(subreq)) {
877 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
878 return;
879 }
880}
881
882/**
883 * Get the result out from an echo request
884 * @param[in] req The async_req from cli_echo_send
885 * @retval Did the server reply correctly?
886 */
887
888NTSTATUS cli_echo_recv(struct tevent_req *req)
889{
890 return tevent_req_simple_recv_ntstatus(req);
891}
892
893/**
894 * @brief Send/Receive SMBEcho requests
895 * @param[in] mem_ctx The memory context to put the async_req on
896 * @param[in] ev The event context that will call us back
897 * @param[in] cli The connection to send the echo to
898 * @param[in] num_echos How many times do we want to get the reply?
899 * @param[in] data The data we want to get back
900 * @retval Did the server reply correctly?
901 */
902
903NTSTATUS cli_echo(struct cli_state *cli, uint16_t num_echos, DATA_BLOB data)
904{
905 TALLOC_CTX *frame = talloc_stackframe();
906 struct event_context *ev;
907 struct tevent_req *req;
908 NTSTATUS status = NT_STATUS_OK;
909
910 if (cli_has_async_calls(cli)) {
911 /*
912 * Can't use sync call while an async call is in flight
913 */
914 status = NT_STATUS_INVALID_PARAMETER;
915 goto fail;
916 }
917
918 ev = event_context_init(frame);
919 if (ev == NULL) {
920 status = NT_STATUS_NO_MEMORY;
921 goto fail;
922 }
923
924 req = cli_echo_send(frame, ev, cli, num_echos, data);
925 if (req == NULL) {
926 status = NT_STATUS_NO_MEMORY;
927 goto fail;
928 }
929
930 if (!tevent_req_poll(req, ev)) {
931 status = map_nt_error_from_unix(errno);
932 goto fail;
933 }
934
935 status = cli_echo_recv(req);
936 fail:
937 TALLOC_FREE(frame);
938 if (!NT_STATUS_IS_OK(status)) {
939 cli_set_error(cli, status);
940 }
941 return status;
942}
943
944/**
945 * Is the SMB command able to hold an AND_X successor
946 * @param[in] cmd The SMB command in question
947 * @retval Can we add a chained request after "cmd"?
948 */
949bool is_andx_req(uint8_t cmd)
950{
951 switch (cmd) {
952 case SMBtconX:
953 case SMBlockingX:
954 case SMBopenX:
955 case SMBreadX:
956 case SMBwriteX:
957 case SMBsesssetupX:
958 case SMBulogoffX:
959 case SMBntcreateX:
960 return true;
961 break;
962 default:
963 break;
964 }
965
966 return false;
967}
Note: See TracBrowser for help on using the repository browser.