?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
samba-3.5.8 for ARM
[tomato.git] / release / src-rt-6.x.4708 / router / samba-3.5.8 / source3 / libsmb / clireadwrite.c
blobb05ba73162e5e8e01113e96fd4192cebdcdf2d08
1 /*
2 Unix SMB/CIFS implementation.
3 client file read/write routines
4 Copyright (C) Andrew Tridgell 1994-1998
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "includes.h"
21
22 /****************************************************************************
23 Calculate the recommended read buffer size
24 ****************************************************************************/
25 static size_t cli_read_max_bufsize(struct cli_state *cli)
26 {
27 if (!client_is_signing_on(cli) && !cli_encryption_on(cli)
28 && (cli->posix_capabilities & CIFS_UNIX_LARGE_READ_CAP)) {
29 return CLI_SAMBA_MAX_POSIX_LARGE_READX_SIZE;
30 }
31 if (cli->capabilities & CAP_LARGE_READX) {
32 return cli->is_samba
33 ? CLI_SAMBA_MAX_LARGE_READX_SIZE
34 : CLI_WINDOWS_MAX_LARGE_READX_SIZE;
35 }
36 return (cli->max_xmit - (smb_size+32)) & ~1023;
37 }
38
39 /****************************************************************************
40 Calculate the recommended write buffer size
41 ****************************************************************************/
42 static size_t cli_write_max_bufsize(struct cli_state *cli, uint16_t write_mode)
43 {
44 if (write_mode == 0 &&
45 !client_is_signing_on(cli) &&
46 !cli_encryption_on(cli) &&
47 (cli->posix_capabilities & CIFS_UNIX_LARGE_WRITE_CAP) &&
48 (cli->capabilities & CAP_LARGE_FILES)) {
49 /* Only do massive writes if we can do them direct
50 * with no signing or encrypting - not on a pipe. */
51 return CLI_SAMBA_MAX_POSIX_LARGE_WRITEX_SIZE;
52 }
53
54 if (cli->is_samba) {
55 return CLI_SAMBA_MAX_LARGE_WRITEX_SIZE;
56 }
57
58 if (((cli->capabilities & CAP_LARGE_WRITEX) == 0)
59 || client_is_signing_on(cli)
60 || strequal(cli->dev, "LPT1:")) {
61
62 /*
63 * Printer devices are restricted to max_xmit writesize in
64 * Vista and XPSP3 as are signing connections.
65 */
66
67 return (cli->max_xmit - (smb_size+32)) & ~1023;
68 }
69
70 return CLI_WINDOWS_MAX_LARGE_WRITEX_SIZE;
71 }
72
73 struct cli_read_andx_state {
74 size_t size;
75 uint16_t vwv[12];
76 NTSTATUS status;
77 size_t received;
78 uint8_t *buf;
79 };
80
81 static void cli_read_andx_done(struct tevent_req *subreq);
82
83 struct tevent_req *cli_read_andx_create(TALLOC_CTX *mem_ctx,
84 struct event_context *ev,
85 struct cli_state *cli, uint16_t fnum,
86 off_t offset, size_t size,
87 struct tevent_req **psmbreq)
88 {
89 struct tevent_req *req, *subreq;
90 struct cli_read_andx_state *state;
91 uint8_t wct = 10;
92
93 if (size > cli_read_max_bufsize(cli)) {
94 DEBUG(0, ("cli_read_andx_send got size=%d, can only handle "
95 "size=%d\n", (int)size,
96 (int)cli_read_max_bufsize(cli)));
97 return NULL;
98 }
99
100 req = tevent_req_create(mem_ctx, &state, struct cli_read_andx_state);
101 if (req == NULL) {
102 return NULL;
103 }
104 state->size = size;
105
106 SCVAL(state->vwv + 0, 0, 0xFF);
107 SCVAL(state->vwv + 0, 1, 0);
108 SSVAL(state->vwv + 1, 0, 0);
109 SSVAL(state->vwv + 2, 0, fnum);
110 SIVAL(state->vwv + 3, 0, offset);
111 SSVAL(state->vwv + 5, 0, size);
112 SSVAL(state->vwv + 6, 0, size);
113 SSVAL(state->vwv + 7, 0, (size >> 16));
114 SSVAL(state->vwv + 8, 0, 0);
115 SSVAL(state->vwv + 9, 0, 0);
116
117 if (cli->capabilities & CAP_LARGE_FILES) {
118 SIVAL(state->vwv + 10, 0,
119 (((uint64_t)offset)>>32) & 0xffffffff);
120 wct = 12;
121 } else {
122 if ((((uint64_t)offset) & 0xffffffff00000000LL) != 0) {
123 DEBUG(10, ("cli_read_andx_send got large offset where "
124 "the server does not support it\n"));
125 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
126 return tevent_req_post(req, ev);
127 }
128 }
129
130 subreq = cli_smb_req_create(state, ev, cli, SMBreadX, 0, wct,
131 state->vwv, 0, NULL);
132 if (subreq == NULL) {
133 TALLOC_FREE(req);
134 return NULL;
135 }
136 tevent_req_set_callback(subreq, cli_read_andx_done, req);
137 *psmbreq = subreq;
138 return req;
139 }
140
141 struct tevent_req *cli_read_andx_send(TALLOC_CTX *mem_ctx,
142 struct event_context *ev,
143 struct cli_state *cli, uint16_t fnum,
144 off_t offset, size_t size)
145 {
146 struct tevent_req *req, *subreq;
147 NTSTATUS status;
148
149 req = cli_read_andx_create(mem_ctx, ev, cli, fnum, offset, size,
150 &subreq);
151 if (req == NULL) {
152 return NULL;
153 }
154
155 status = cli_smb_req_send(subreq);
156 if (!NT_STATUS_IS_OK(status)) {
157 tevent_req_nterror(req, status);
158 return tevent_req_post(req, ev);
159 }
160 return req;
161 }
162
163 static void cli_read_andx_done(struct tevent_req *subreq)
164 {
165 struct tevent_req *req = tevent_req_callback_data(
166 subreq, struct tevent_req);
167 struct cli_read_andx_state *state = tevent_req_data(
168 req, struct cli_read_andx_state);
169 uint8_t *inbuf;
170 uint8_t wct;
171 uint16_t *vwv;
172 uint32_t num_bytes;
173 uint8_t *bytes;
174
175 state->status = cli_smb_recv(subreq, 12, &wct, &vwv, &num_bytes,
176 &bytes);
177 if (NT_STATUS_IS_ERR(state->status)) {
178 tevent_req_nterror(req, state->status);
179 return;
180 }
181
182 /* size is the number of bytes the server returned.
183 * Might be zero. */
184 state->received = SVAL(vwv + 5, 0);
185 state->received |= (((unsigned int)SVAL(vwv + 7, 0)) << 16);
186
187 if (state->received > state->size) {
188 DEBUG(5,("server returned more than we wanted!\n"));
189 tevent_req_nterror(req, NT_STATUS_UNEXPECTED_IO_ERROR);
190 return;
191 }
192
193 /*
194 * bcc field must be valid for small reads, for large reads the 16-bit
195 * bcc field can't be correct.
196 */
197
198 if ((state->received < 0xffff) && (state->received > num_bytes)) {
199 DEBUG(5, ("server announced more bytes than sent\n"));
200 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
201 return;
202 }
203
204 inbuf = cli_smb_inbuf(subreq);
205 state->buf = (uint8_t *)smb_base(inbuf) + SVAL(vwv+6, 0);
206
207 if (trans_oob(smb_len(inbuf), SVAL(vwv+6, 0), state->received)
208 || ((state->received != 0) && (state->buf < bytes))) {
209 DEBUG(5, ("server returned invalid read&x data offset\n"));
210 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
211 return;
212 }
213 tevent_req_done(req);
214 }
215
216 /*
217 * Pull the data out of a finished async read_and_x request. rcvbuf is
218 * talloced from the request, so better make sure that you copy it away before
219 * you talloc_free(req). "rcvbuf" is NOT a talloc_ctx of its own, so do not
220 * talloc_move it!
221 */
222
223 NTSTATUS cli_read_andx_recv(struct tevent_req *req, ssize_t *received,
224 uint8_t **rcvbuf)
225 {
226 struct cli_read_andx_state *state = tevent_req_data(
227 req, struct cli_read_andx_state);
228 NTSTATUS status;
229
230 if (tevent_req_is_nterror(req, &status)) {
231 return status;
232 }
233 *received = state->received;
234 *rcvbuf = state->buf;
235 return NT_STATUS_OK;
236 }
237
238 struct cli_readall_state {
239 struct tevent_context *ev;
240 struct cli_state *cli;
241 uint16_t fnum;
242 off_t start_offset;
243 size_t size;
244 size_t received;
245 uint8_t *buf;
246 };
247
248 static void cli_readall_done(struct tevent_req *subreq);
249
250 static struct tevent_req *cli_readall_send(TALLOC_CTX *mem_ctx,
251 struct event_context *ev,
252 struct cli_state *cli,
253 uint16_t fnum,
254 off_t offset, size_t size)
255 {
256 struct tevent_req *req, *subreq;
257 struct cli_readall_state *state;
258
259 req = tevent_req_create(mem_ctx, &state, struct cli_readall_state);
260 if (req == NULL) {
261 return NULL;
262 }
263 state->ev = ev;
264 state->cli = cli;
265 state->fnum = fnum;
266 state->start_offset = offset;
267 state->size = size;
268 state->received = 0;
269 state->buf = NULL;
270
271 subreq = cli_read_andx_send(state, ev, cli, fnum, offset, size);
272 if (tevent_req_nomem(subreq, req)) {
273 return tevent_req_post(req, ev);
274 }
275 tevent_req_set_callback(subreq, cli_readall_done, req);
276 return req;
277 }
278
279 static void cli_readall_done(struct tevent_req *subreq)
280 {
281 struct tevent_req *req = tevent_req_callback_data(
282 subreq, struct tevent_req);
283 struct cli_readall_state *state = tevent_req_data(
284 req, struct cli_readall_state);
285 ssize_t received;
286 uint8_t *buf;
287 NTSTATUS status;
288
289 status = cli_read_andx_recv(subreq, &received, &buf);
290 if (!NT_STATUS_IS_OK(status)) {
291 tevent_req_nterror(req, status);
292 return;
293 }
294
295 if (received == 0) {
296 /* EOF */
297 tevent_req_done(req);
298 return;
299 }
300
301 if ((state->received == 0) && (received == state->size)) {
302 /* Ideal case: Got it all in one run */
303 state->buf = buf;
304 state->received += received;
305 tevent_req_done(req);
306 return;
307 }
308
309 /*
310 * We got a short read, issue a read for the
311 * rest. Unfortunately we have to allocate the buffer
312 * ourselves now, as our caller expects to receive a single
313 * buffer. cli_read_andx does it from the buffer received from
314 * the net, but with a short read we have to put it together
315 * from several reads.
316 */
317
318 if (state->buf == NULL) {
319 state->buf = talloc_array(state, uint8_t, state->size);
320 if (tevent_req_nomem(state->buf, req)) {
321 return;
322 }
323 }
324 memcpy(state->buf + state->received, buf, received);
325 state->received += received;
326
327 TALLOC_FREE(subreq);
328
329 if (state->received >= state->size) {
330 tevent_req_done(req);
331 return;
332 }
333
334 subreq = cli_read_andx_send(state, state->ev, state->cli, state->fnum,
335 state->start_offset + state->received,
336 state->size - state->received);
337 if (tevent_req_nomem(subreq, req)) {
338 return;
339 }
340 tevent_req_set_callback(subreq, cli_readall_done, req);
341 }
342
343 static NTSTATUS cli_readall_recv(struct tevent_req *req, ssize_t *received,
344 uint8_t **rcvbuf)
345 {
346 struct cli_readall_state *state = tevent_req_data(
347 req, struct cli_readall_state);
348 NTSTATUS status;
349
350 if (tevent_req_is_nterror(req, &status)) {
351 return status;
352 }
353 *received = state->received;
354 *rcvbuf = state->buf;
355 return NT_STATUS_OK;
356 }
357
358 struct cli_pull_subreq {
359 struct tevent_req *req;
360 ssize_t received;
361 uint8_t *buf;
362 };
363
364 /*
365 * Parallel read support.
366 *
367 * cli_pull sends as many read&x requests as the server would allow via
368 * max_mux at a time. When replies flow back in, the data is written into
369 * the callback function "sink" in the right order.
370 */
371
372 struct cli_pull_state {
373 struct tevent_req *req;
374
375 struct event_context *ev;
376 struct cli_state *cli;
377 uint16_t fnum;
378 off_t start_offset;
379 SMB_OFF_T size;
380
381 NTSTATUS (*sink)(char *buf, size_t n, void *priv);
382 void *priv;
383
384 size_t chunk_size;
385
386 /*
387 * Outstanding requests
388 */
389 int num_reqs;
390 struct cli_pull_subreq *reqs;
391
392 /*
393 * For how many bytes did we send requests already?
394 */
395 SMB_OFF_T requested;
396
397 /*
398 * Next request index to push into "sink". This walks around the "req"
399 * array, taking care that the requests are pushed to "sink" in the
400 * right order. If necessary (i.e. replies don't come in in the right
401 * order), replies are held back in "reqs".
402 */
403 int top_req;
404
405 /*
406 * How many bytes did we push into "sink"?
407 */
408
409 SMB_OFF_T pushed;
410 };
411
412 static char *cli_pull_print(struct tevent_req *req, TALLOC_CTX *mem_ctx)
413 {
414 struct cli_pull_state *state = tevent_req_data(
415 req, struct cli_pull_state);
416 char *result;
417
418 result = tevent_req_print(mem_ctx, req);
419 if (result == NULL) {
420 return NULL;
421 }
422
423 return talloc_asprintf_append_buffer(
424 result, "num_reqs=%d, top_req=%d",
425 state->num_reqs, state->top_req);
426 }
427
428 static void cli_pull_read_done(struct tevent_req *read_req);
429
430 /*
431 * Prepare an async pull request
432 */
433
434 struct tevent_req *cli_pull_send(TALLOC_CTX *mem_ctx,
435 struct event_context *ev,
436 struct cli_state *cli,
437 uint16_t fnum, off_t start_offset,
438 SMB_OFF_T size, size_t window_size,
439 NTSTATUS (*sink)(char *buf, size_t n,
440 void *priv),
441 void *priv)
442 {
443 struct tevent_req *req;
444 struct cli_pull_state *state;
445 int i;
446
447 req = tevent_req_create(mem_ctx, &state, struct cli_pull_state);
448 if (req == NULL) {
449 return NULL;
450 }
451 tevent_req_set_print_fn(req, cli_pull_print);
452 state->req = req;
453
454 state->cli = cli;
455 state->ev = ev;
456 state->fnum = fnum;
457 state->start_offset = start_offset;
458 state->size = size;
459 state->sink = sink;
460 state->priv = priv;
461
462 state->pushed = 0;
463 state->top_req = 0;
464
465 if (size == 0) {
466 tevent_req_done(req);
467 return tevent_req_post(req, ev);
468 }
469
470 state->chunk_size = cli_read_max_bufsize(cli);
471
472 state->num_reqs = MAX(window_size/state->chunk_size, 1);
473 state->num_reqs = MIN(state->num_reqs, cli->max_mux);
474
475 state->reqs = TALLOC_ZERO_ARRAY(state, struct cli_pull_subreq,
476 state->num_reqs);
477 if (state->reqs == NULL) {
478 goto failed;
479 }
480
481 state->requested = 0;
482
483 for (i=0; i<state->num_reqs; i++) {
484 struct cli_pull_subreq *subreq = &state->reqs[i];
485 SMB_OFF_T size_left;
486 size_t request_thistime;
487
488 if (state->requested >= size) {
489 state->num_reqs = i;
490 break;
491 }
492
493 size_left = size - state->requested;
494 request_thistime = MIN(size_left, state->chunk_size);
495
496 subreq->req = cli_readall_send(
497 state->reqs, ev, cli, fnum,
498 state->start_offset + state->requested,
499 request_thistime);
500
501 if (subreq->req == NULL) {
502 goto failed;
503 }
504 tevent_req_set_callback(subreq->req, cli_pull_read_done, req);
505 state->requested += request_thistime;
506 }
507 return req;
508
509 failed:
510 TALLOC_FREE(req);
511 return NULL;
512 }
513
514 /*
515 * Handle incoming read replies, push the data into sink and send out new
516 * requests if necessary.
517 */
518
519 static void cli_pull_read_done(struct tevent_req *subreq)
520 {
521 struct tevent_req *req = tevent_req_callback_data(
522 subreq, struct tevent_req);
523 struct cli_pull_state *state = tevent_req_data(
524 req, struct cli_pull_state);
525 struct cli_pull_subreq *pull_subreq = NULL;
526 NTSTATUS status;
527 int i;
528
529 for (i = 0; i < state->num_reqs; i++) {
530 pull_subreq = &state->reqs[i];
531 if (subreq == pull_subreq->req) {
532 break;
533 }
534 }
535 if (i == state->num_reqs) {
536 /* Huh -- received something we did not send?? */
537 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
538 return;
539 }
540
541 status = cli_readall_recv(subreq, &pull_subreq->received,
542 &pull_subreq->buf);
543 if (!NT_STATUS_IS_OK(status)) {
544 tevent_req_nterror(state->req, status);
545 return;
546 }
547
548 /*
549 * This loop is the one to take care of out-of-order replies. All
550 * pending requests are in state->reqs, state->reqs[top_req] is the
551 * one that is to be pushed next. If however a request later than
552 * top_req is replied to, then we can't push yet. If top_req is
553 * replied to at a later point then, we need to push all the finished
554 * requests.
555 */
556
557 while (state->reqs[state->top_req].req != NULL) {
558 struct cli_pull_subreq *top_subreq;
559
560 DEBUG(11, ("cli_pull_read_done: top_req = %d\n",
561 state->top_req));
562
563 top_subreq = &state->reqs[state->top_req];
564
565 if (tevent_req_is_in_progress(top_subreq->req)) {
566 DEBUG(11, ("cli_pull_read_done: top request not yet "
567 "done\n"));
568 return;
569 }
570
571 DEBUG(10, ("cli_pull_read_done: Pushing %d bytes, %d already "
572 "pushed\n", (int)top_subreq->received,
573 (int)state->pushed));
574
575 status = state->sink((char *)top_subreq->buf,
576 top_subreq->received, state->priv);
577 if (!NT_STATUS_IS_OK(status)) {
578 tevent_req_nterror(state->req, status);
579 return;
580 }
581 state->pushed += top_subreq->received;
582
583 TALLOC_FREE(state->reqs[state->top_req].req);
584
585 if (state->requested < state->size) {
586 struct tevent_req *new_req;
587 SMB_OFF_T size_left;
588 size_t request_thistime;
589
590 size_left = state->size - state->requested;
591 request_thistime = MIN(size_left, state->chunk_size);
592
593 DEBUG(10, ("cli_pull_read_done: Requesting %d bytes "
594 "at %d, position %d\n",
595 (int)request_thistime,
596 (int)(state->start_offset
597 + state->requested),
598 state->top_req));
599
600 new_req = cli_readall_send(
601 state->reqs, state->ev, state->cli,
602 state->fnum,
603 state->start_offset + state->requested,
604 request_thistime);
605
606 if (tevent_req_nomem(new_req, state->req)) {
607 return;
608 }
609 tevent_req_set_callback(new_req, cli_pull_read_done,
610 req);
611
612 state->reqs[state->top_req].req = new_req;
613 state->requested += request_thistime;
614 }
615
616 state->top_req = (state->top_req+1) % state->num_reqs;
617 }
618
619 tevent_req_done(req);
620 }
621
622 NTSTATUS cli_pull_recv(struct tevent_req *req, SMB_OFF_T *received)
623 {
624 struct cli_pull_state *state = tevent_req_data(
625 req, struct cli_pull_state);
626 NTSTATUS status;
627
628 if (tevent_req_is_nterror(req, &status)) {
629 return status;
630 }
631 *received = state->pushed;
632 return NT_STATUS_OK;
633 }
634
635 NTSTATUS cli_pull(struct cli_state *cli, uint16_t fnum,
636 off_t start_offset, SMB_OFF_T size, size_t window_size,
637 NTSTATUS (*sink)(char *buf, size_t n, void *priv),
638 void *priv, SMB_OFF_T *received)
639 {
640 TALLOC_CTX *frame = talloc_stackframe();
641 struct event_context *ev;
642 struct tevent_req *req;
643 NTSTATUS status = NT_STATUS_OK;
644
645 if (cli_has_async_calls(cli)) {
646 /*
647 * Can't use sync call while an async call is in flight
648 */
649 status = NT_STATUS_INVALID_PARAMETER;
650 goto fail;
651 }
652
653 ev = event_context_init(frame);
654 if (ev == NULL) {
655 status = NT_STATUS_NO_MEMORY;
656 goto fail;
657 }
658
659 req = cli_pull_send(frame, ev, cli, fnum, start_offset, size,
660 window_size, sink, priv);
661 if (req == NULL) {
662 status = NT_STATUS_NO_MEMORY;
663 goto fail;
664 }
665
666 if (!tevent_req_poll(req, ev)) {
667 status = map_nt_error_from_unix(errno);
668 goto fail;
669 }
670
671 status = cli_pull_recv(req, received);
672 fail:
673 TALLOC_FREE(frame);
674 if (!NT_STATUS_IS_OK(status)) {
675 cli_set_error(cli, status);
676 }
677 return status;
678 }
679
680 static NTSTATUS cli_read_sink(char *buf, size_t n, void *priv)
681 {
682 char **pbuf = (char **)priv;
683 memcpy(*pbuf, buf, n);
684 *pbuf += n;
685 return NT_STATUS_OK;
686 }
687
688 ssize_t cli_read(struct cli_state *cli, uint16_t fnum, char *buf,
689 off_t offset, size_t size)
690 {
691 NTSTATUS status;
692 SMB_OFF_T ret;
693
694 status = cli_pull(cli, fnum, offset, size, size,
695 cli_read_sink, &buf, &ret);
696 if (!NT_STATUS_IS_OK(status)) {
697 cli_set_error(cli, status);
698 return -1;
699 }
700 return ret;
701 }
702
703 /****************************************************************************
704 Issue a single SMBwrite and don't wait for a reply.
705 ****************************************************************************/
706
707 static bool cli_issue_write(struct cli_state *cli,
708 uint16_t fnum,
709 off_t offset,
710 uint16 mode,
711 const char *buf,
712 size_t size)
713 {
714 char *p;
715 bool large_writex = false;
716 /* We can only do direct writes if not signing and not encrypting. */
717 bool direct_writes = !client_is_signing_on(cli) && !cli_encryption_on(cli);
718
719 if (!direct_writes && size + 1 > cli->bufsize) {
720 cli->outbuf = (char *)SMB_REALLOC(cli->outbuf, size + 1024);
721 if (!cli->outbuf) {
722 return False;
723 }
724 cli->inbuf = (char *)SMB_REALLOC(cli->inbuf, size + 1024);
725 if (cli->inbuf == NULL) {
726 SAFE_FREE(cli->outbuf);
727 return False;
728 }
729 cli->bufsize = size + 1024;
730 }
731
732 memset(cli->outbuf,'\0',smb_size);
733 memset(cli->inbuf,'\0',smb_size);
734
735 if (cli->capabilities & CAP_LARGE_FILES) {
736 large_writex = True;
737 }
738
739 if (large_writex) {
740 cli_set_message(cli->outbuf,14,0,True);
741 } else {
742 cli_set_message(cli->outbuf,12,0,True);
743 }
744
745 SCVAL(cli->outbuf,smb_com,SMBwriteX);
746 SSVAL(cli->outbuf,smb_tid,cli->cnum);
747 cli_setup_packet(cli);
748
749 SCVAL(cli->outbuf,smb_vwv0,0xFF);
750 SSVAL(cli->outbuf,smb_vwv2,fnum);
751
752 SIVAL(cli->outbuf,smb_vwv3,offset);
753 SIVAL(cli->outbuf,smb_vwv5,0);
754 SSVAL(cli->outbuf,smb_vwv7,mode);
755
756 SSVAL(cli->outbuf,smb_vwv8,(mode & 0x0008) ? size : 0);
757 /*
758 * According to CIFS-TR-1p00, this following field should only
759 * be set if CAP_LARGE_WRITEX is set. We should check this
760 * locally. However, this check might already have been
761 * done by our callers.
762 */
763 SSVAL(cli->outbuf,smb_vwv9,(size>>16));
764 SSVAL(cli->outbuf,smb_vwv10,size);
765 /* +1 is pad byte. */
766 SSVAL(cli->outbuf,smb_vwv11,
767 smb_buf(cli->outbuf) - smb_base(cli->outbuf) + 1);
768
769 if (large_writex) {
770 SIVAL(cli->outbuf,smb_vwv12,(((uint64_t)offset)>>32) & 0xffffffff);
771 }
772
773 p = smb_base(cli->outbuf) + SVAL(cli->outbuf,smb_vwv11) -1;
774 *p++ = '\0'; /* pad byte. */
775 if (!direct_writes) {
776 memcpy(p, buf, size);
777 }
778 if (size > 0x1FFFF) {
779 /* This is a POSIX 14 word large write. */
780 set_message_bcc(cli->outbuf, 0); /* Set bcc to zero. */
781 _smb_setlen_large(cli->outbuf,smb_size + 28 + 1 /* pad */ + size - 4);
782 } else {
783 cli_setup_bcc(cli, p+size);
784 }
785
786 show_msg(cli->outbuf);
787 if (direct_writes) {
788 /* For direct writes we now need to write the data
789 * directly out of buf. */
790 return cli_send_smb_direct_writeX(cli, buf, size);
791 } else {
792 return cli_send_smb(cli);
793 }
794 }
795
796 /****************************************************************************
797 write to a file
798 write_mode: 0x0001 disallow write cacheing
799 0x0002 return bytes remaining
800 0x0004 use raw named pipe protocol
801 0x0008 start of message mode named pipe protocol
802 ****************************************************************************/
803
804 ssize_t cli_write(struct cli_state *cli,
805 uint16_t fnum, uint16 write_mode,
806 const char *buf, off_t offset, size_t size)
807 {
808 ssize_t bwritten = 0;
809 unsigned int issued = 0;
810 unsigned int received = 0;
811 int mpx = 1;
812 size_t writesize;
813 int blocks;
814
815 if(cli->max_mux > 1) {
816 mpx = cli->max_mux-1;
817 } else {
818 mpx = 1;
819 }
820
821 writesize = cli_write_max_bufsize(cli, write_mode);
822
823 blocks = (size + (writesize-1)) / writesize;
824
825 while (received < blocks) {
826
827 while ((issued - received < mpx) && (issued < blocks)) {
828 ssize_t bsent = issued * writesize;
829 ssize_t size1 = MIN(writesize, size - bsent);
830
831 if (!cli_issue_write(cli, fnum, offset + bsent,
832 write_mode,
833 buf + bsent,
834 size1))
835 return -1;
836 issued++;
837 }
838
839 if (!cli_receive_smb(cli)) {
840 return bwritten;
841 }
842
843 received++;
844
845 if (cli_is_error(cli))
846 break;
847
848 bwritten += SVAL(cli->inbuf, smb_vwv2);
849 if (writesize > 0xFFFF) {
850 bwritten += (((int)(SVAL(cli->inbuf, smb_vwv4)))<<16);
851 }
852 }
853
854 while (received < issued && cli_receive_smb(cli)) {
855 received++;
856 }
857
858 return bwritten;
859 }
860
861 /****************************************************************************
862 write to a file using a SMBwrite and not bypassing 0 byte writes
863 ****************************************************************************/
864
865 ssize_t cli_smbwrite(struct cli_state *cli,
866 uint16_t fnum, char *buf, off_t offset, size_t size1)
867 {
868 char *p;
869 ssize_t total = 0;
870
871 do {
872 size_t size = MIN(size1, cli->max_xmit - 48);
873
874 memset(cli->outbuf,'\0',smb_size);
875 memset(cli->inbuf,'\0',smb_size);
876
877 cli_set_message(cli->outbuf,5, 0,True);
878
879 SCVAL(cli->outbuf,smb_com,SMBwrite);
880 SSVAL(cli->outbuf,smb_tid,cli->cnum);
881 cli_setup_packet(cli);
882
883 SSVAL(cli->outbuf,smb_vwv0,fnum);
884 SSVAL(cli->outbuf,smb_vwv1,size);
885 SIVAL(cli->outbuf,smb_vwv2,offset);
886 SSVAL(cli->outbuf,smb_vwv4,0);
887
888 p = smb_buf(cli->outbuf);
889 *p++ = 1;
890 SSVAL(p, 0, size); p += 2;
891 memcpy(p, buf + total, size); p += size;
892
893 cli_setup_bcc(cli, p);
894
895 if (!cli_send_smb(cli))
896 return -1;
897
898 if (!cli_receive_smb(cli))
899 return -1;
900
901 if (cli_is_error(cli))
902 return -1;
903
904 size = SVAL(cli->inbuf,smb_vwv0);
905 if (size == 0)
906 break;
907
908 size1 -= size;
909 total += size;
910 offset += size;
911
912 } while (size1);
913
914 return total;
915 }
916
917 /*
918 * Send a write&x request
919 */
920
921 struct cli_write_andx_state {
922 size_t size;
923 uint16_t vwv[14];
924 size_t written;
925 uint8_t pad;
926 struct iovec iov[2];
927 };
928
929 static void cli_write_andx_done(struct tevent_req *subreq);
930
931 struct tevent_req *cli_write_andx_create(TALLOC_CTX *mem_ctx,
932 struct event_context *ev,
933 struct cli_state *cli, uint16_t fnum,
934 uint16_t mode, const uint8_t *buf,
935 off_t offset, size_t size,
936 struct tevent_req **reqs_before,
937 int num_reqs_before,
938 struct tevent_req **psmbreq)
939 {
940 struct tevent_req *req, *subreq;
941 struct cli_write_andx_state *state;
942 bool bigoffset = ((cli->capabilities & CAP_LARGE_FILES) != 0);
943 uint8_t wct = bigoffset ? 14 : 12;
944 size_t max_write = cli_write_max_bufsize(cli, mode);
945 uint16_t *vwv;
946
947 req = tevent_req_create(mem_ctx, &state, struct cli_write_andx_state);
948 if (req == NULL) {
949 return NULL;
950 }
951
952 size = MIN(size, max_write);
953
954 vwv = state->vwv;
955
956 SCVAL(vwv+0, 0, 0xFF);
957 SCVAL(vwv+0, 1, 0);
958 SSVAL(vwv+1, 0, 0);
959 SSVAL(vwv+2, 0, fnum);
960 SIVAL(vwv+3, 0, offset);
961 SIVAL(vwv+5, 0, 0);
962 SSVAL(vwv+7, 0, mode);
963 SSVAL(vwv+8, 0, 0);
964 SSVAL(vwv+9, 0, (size>>16));
965 SSVAL(vwv+10, 0, size);
966
967 SSVAL(vwv+11, 0,
968 cli_smb_wct_ofs(reqs_before, num_reqs_before)
969 + 1 /* the wct field */
970 + wct * 2 /* vwv */
971 + 2 /* num_bytes field */
972 + 1 /* pad */);
973
974 if (bigoffset) {
975 SIVAL(vwv+12, 0, (((uint64_t)offset)>>32) & 0xffffffff);
976 }
977
978 state->pad = 0;
979 state->iov[0].iov_base = (void *)&state->pad;
980 state->iov[0].iov_len = 1;
981 state->iov[1].iov_base = CONST_DISCARD(void *, buf);
982 state->iov[1].iov_len = size;
983
984 subreq = cli_smb_req_create(state, ev, cli, SMBwriteX, 0, wct, vwv,
985 2, state->iov);
986 if (tevent_req_nomem(subreq, req)) {
987 return tevent_req_post(req, ev);
988 }
989 tevent_req_set_callback(subreq, cli_write_andx_done, req);
990 *psmbreq = subreq;
991 return req;
992 }
993
994 struct tevent_req *cli_write_andx_send(TALLOC_CTX *mem_ctx,
995 struct event_context *ev,
996 struct cli_state *cli, uint16_t fnum,
997 uint16_t mode, const uint8_t *buf,
998 off_t offset, size_t size)
999 {
1000 struct tevent_req *req, *subreq;
1001 NTSTATUS status;
1002
1003 req = cli_write_andx_create(mem_ctx, ev, cli, fnum, mode, buf, offset,
1004 size, NULL, 0, &subreq);
1005 if (req == NULL) {
1006 return NULL;
1007 }
1008
1009 status = cli_smb_req_send(subreq);
1010 if (!NT_STATUS_IS_OK(status)) {
1011 tevent_req_nterror(req, status);
1012 return tevent_req_post(req, ev);
1013 }
1014 return req;
1015 }
1016
1017 static void cli_write_andx_done(struct tevent_req *subreq)
1018 {
1019 struct tevent_req *req = tevent_req_callback_data(
1020 subreq, struct tevent_req);
1021 struct cli_write_andx_state *state = tevent_req_data(
1022 req, struct cli_write_andx_state);
1023 uint8_t wct;
1024 uint16_t *vwv;
1025 NTSTATUS status;
1026
1027 status = cli_smb_recv(subreq, 6, &wct, &vwv, NULL, NULL);
1028 if (NT_STATUS_IS_ERR(status)) {
1029 TALLOC_FREE(subreq);
1030 tevent_req_nterror(req, status);
1031 return;
1032 }
1033 state->written = SVAL(vwv+2, 0);
1034 state->written |= SVAL(vwv+4, 0)<<16;
1035 tevent_req_done(req);
1036 }
1037
1038 NTSTATUS cli_write_andx_recv(struct tevent_req *req, size_t *pwritten)
1039 {
1040 struct cli_write_andx_state *state = tevent_req_data(
1041 req, struct cli_write_andx_state);
1042 NTSTATUS status;
1043
1044 if (tevent_req_is_nterror(req, &status)) {
1045 return status;
1046 }
1047 *pwritten = state->written;
1048 return NT_STATUS_OK;
1049 }
1050
1051 struct cli_writeall_state {
1052 struct event_context *ev;
1053 struct cli_state *cli;
1054 uint16_t fnum;
1055 uint16_t mode;
1056 const uint8_t *buf;
1057 off_t offset;
1058 size_t size;
1059 size_t written;
1060 };
1061
1062 static void cli_writeall_written(struct tevent_req *req);
1063
1064 static struct tevent_req *cli_writeall_send(TALLOC_CTX *mem_ctx,
1065 struct event_context *ev,
1066 struct cli_state *cli,
1067 uint16_t fnum,
1068 uint16_t mode,
1069 const uint8_t *buf,
1070 off_t offset, size_t size)
1071 {
1072 struct tevent_req *req, *subreq;
1073 struct cli_writeall_state *state;
1074
1075 req = tevent_req_create(mem_ctx, &state, struct cli_writeall_state);
1076 if (req == NULL) {
1077 return NULL;
1078 }
1079 state->ev = ev;
1080 state->cli = cli;
1081 state->fnum = fnum;
1082 state->mode = mode;
1083 state->buf = buf;
1084 state->offset = offset;
1085 state->size = size;
1086 state->written = 0;
1087
1088 subreq = cli_write_andx_send(state, state->ev, state->cli, state->fnum,
1089 state->mode, state->buf, state->offset,
1090 state->size);
1091 if (tevent_req_nomem(subreq, req)) {
1092 return tevent_req_post(req, ev);
1093 }
1094 tevent_req_set_callback(subreq, cli_writeall_written, req);
1095 return req;
1096 }
1097
1098 static void cli_writeall_written(struct tevent_req *subreq)
1099 {
1100 struct tevent_req *req = tevent_req_callback_data(
1101 subreq, struct tevent_req);
1102 struct cli_writeall_state *state = tevent_req_data(
1103 req, struct cli_writeall_state);
1104 NTSTATUS status;
1105 size_t written, to_write;
1106
1107 status = cli_write_andx_recv(subreq, &written);
1108 TALLOC_FREE(subreq);
1109 if (!NT_STATUS_IS_OK(status)) {
1110 tevent_req_nterror(req, status);
1111 return;
1112 }
1113
1114 state->written += written;
1115
1116 if (state->written > state->size) {
1117 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
1118 return;
1119 }
1120
1121 to_write = state->size - state->written;
1122
1123 if (to_write == 0) {
1124 tevent_req_done(req);
1125 return;
1126 }
1127
1128 subreq = cli_write_andx_send(state, state->ev, state->cli, state->fnum,
1129 state->mode,
1130 state->buf + state->written,
1131 state->offset + state->written, to_write);
1132 if (tevent_req_nomem(subreq, req)) {
1133 return;
1134 }
1135 tevent_req_set_callback(subreq, cli_writeall_written, req);
1136 }
1137
1138 static NTSTATUS cli_writeall_recv(struct tevent_req *req)
1139 {
1140 return tevent_req_simple_recv_ntstatus(req);
1141 }
1142
1143 struct cli_push_write_state {
1144 struct tevent_req *req;/* This is the main request! Not the subreq */
1145 uint32_t idx;
1146 off_t ofs;
1147 uint8_t *buf;
1148 size_t size;
1149 };
1150
1151 struct cli_push_state {
1152 struct event_context *ev;
1153 struct cli_state *cli;
1154 uint16_t fnum;
1155 uint16_t mode;
1156 off_t start_offset;
1157 size_t window_size;
1158
1159 size_t (*source)(uint8_t *buf, size_t n, void *priv);
1160 void *priv;
1161
1162 bool eof;
1163
1164 size_t chunk_size;
1165 off_t next_offset;
1166
1167 /*
1168 * Outstanding requests
1169 */
1170 uint32_t pending;
1171 uint32_t num_reqs;
1172 struct cli_push_write_state **reqs;
1173 };
1174
1175 static void cli_push_written(struct tevent_req *req);
1176
1177 static bool cli_push_write_setup(struct tevent_req *req,
1178 struct cli_push_state *state,
1179 uint32_t idx)
1180 {
1181 struct cli_push_write_state *substate;
1182 struct tevent_req *subreq;
1183
1184 substate = talloc(state->reqs, struct cli_push_write_state);
1185 if (!substate) {
1186 return false;
1187 }
1188 substate->req = req;
1189 substate->idx = idx;
1190 substate->ofs = state->next_offset;
1191 substate->buf = talloc_array(substate, uint8_t, state->chunk_size);
1192 if (!substate->buf) {
1193 talloc_free(substate);
1194 return false;
1195 }
1196 substate->size = state->source(substate->buf,
1197 state->chunk_size,
1198 state->priv);
1199 if (substate->size == 0) {
1200 state->eof = true;
1201 /* nothing to send */
1202 talloc_free(substate);
1203 return true;
1204 }
1205
1206 subreq = cli_writeall_send(substate,
1207 state->ev, state->cli,
1208 state->fnum, state->mode,
1209 substate->buf,
1210 substate->ofs,
1211 substate->size);
1212 if (!subreq) {
1213 talloc_free(substate);
1214 return false;
1215 }
1216 tevent_req_set_callback(subreq, cli_push_written, substate);
1217
1218 state->reqs[idx] = substate;
1219 state->pending += 1;
1220 state->next_offset += substate->size;
1221
1222 return true;
1223 }
1224
1225 struct tevent_req *cli_push_send(TALLOC_CTX *mem_ctx, struct event_context *ev,
1226 struct cli_state *cli,
1227 uint16_t fnum, uint16_t mode,
1228 off_t start_offset, size_t window_size,
1229 size_t (*source)(uint8_t *buf, size_t n,
1230 void *priv),
1231 void *priv)
1232 {
1233 struct tevent_req *req;
1234 struct cli_push_state *state;
1235 uint32_t i;
1236
1237 req = tevent_req_create(mem_ctx, &state, struct cli_push_state);
1238 if (req == NULL) {
1239 return NULL;
1240 }
1241 state->cli = cli;
1242 state->ev = ev;
1243 state->fnum = fnum;
1244 state->start_offset = start_offset;
1245 state->mode = mode;
1246 state->source = source;
1247 state->priv = priv;
1248 state->eof = false;
1249 state->pending = 0;
1250 state->next_offset = start_offset;
1251
1252 state->chunk_size = cli_write_max_bufsize(cli, mode);
1253
1254 if (window_size == 0) {
1255 window_size = cli->max_mux * state->chunk_size;
1256 }
1257 state->num_reqs = window_size/state->chunk_size;
1258 if ((window_size % state->chunk_size) > 0) {
1259 state->num_reqs += 1;
1260 }
1261 state->num_reqs = MIN(state->num_reqs, cli->max_mux);
1262 state->num_reqs = MAX(state->num_reqs, 1);
1263
1264 state->reqs = TALLOC_ZERO_ARRAY(state, struct cli_push_write_state *,
1265 state->num_reqs);
1266 if (state->reqs == NULL) {
1267 goto failed;
1268 }
1269
1270 for (i=0; i<state->num_reqs; i++) {
1271 if (!cli_push_write_setup(req, state, i)) {
1272 goto failed;
1273 }
1274
1275 if (state->eof) {
1276 break;
1277 }
1278 }
1279
1280 if (state->pending == 0) {
1281 tevent_req_done(req);
1282 return tevent_req_post(req, ev);
1283 }
1284
1285 return req;
1286
1287 failed:
1288 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1289 return tevent_req_post(req, ev);
1290 }
1291
1292 static void cli_push_written(struct tevent_req *subreq)
1293 {
1294 struct cli_push_write_state *substate = tevent_req_callback_data(
1295 subreq, struct cli_push_write_state);
1296 struct tevent_req *req = substate->req;
1297 struct cli_push_state *state = tevent_req_data(
1298 req, struct cli_push_state);
1299 NTSTATUS status;
1300 uint32_t idx = substate->idx;
1301
1302 state->reqs[idx] = NULL;
1303 state->pending -= 1;
1304
1305 status = cli_writeall_recv(subreq);
1306 TALLOC_FREE(subreq);
1307 TALLOC_FREE(substate);
1308 if (!NT_STATUS_IS_OK(status)) {
1309 tevent_req_nterror(req, status);
1310 return;
1311 }
1312
1313 if (!state->eof) {
1314 if (!cli_push_write_setup(req, state, idx)) {
1315 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1316 return;
1317 }
1318 }
1319
1320 if (state->pending == 0) {
1321 tevent_req_done(req);
1322 return;
1323 }
1324 }
1325
1326 NTSTATUS cli_push_recv(struct tevent_req *req)
1327 {
1328 return tevent_req_simple_recv_ntstatus(req);
1329 }
1330
1331 NTSTATUS cli_push(struct cli_state *cli, uint16_t fnum, uint16_t mode,
1332 off_t start_offset, size_t window_size,
1333 size_t (*source)(uint8_t *buf, size_t n, void *priv),
1334 void *priv)
1335 {
1336 TALLOC_CTX *frame = talloc_stackframe();
1337 struct event_context *ev;
1338 struct tevent_req *req;
1339 NTSTATUS status = NT_STATUS_OK;
1340
1341 if (cli_has_async_calls(cli)) {
1342 /*
1343 * Can't use sync call while an async call is in flight
1344 */
1345 status = NT_STATUS_INVALID_PARAMETER;
1346 goto fail;
1347 }
1348
1349 ev = event_context_init(frame);
1350 if (ev == NULL) {
1351 status = NT_STATUS_NO_MEMORY;
1352 goto fail;
1353 }
1354
1355 req = cli_push_send(frame, ev, cli, fnum, mode, start_offset,
1356 window_size, source, priv);
1357 if (req == NULL) {
1358 status = NT_STATUS_NO_MEMORY;
1359 goto fail;
1360 }
1361
1362 if (!tevent_req_poll(req, ev)) {
1363 status = map_nt_error_from_unix(errno);
1364 goto fail;
1365 }
1366
1367 status = cli_push_recv(req);
1368 fail:
1369 TALLOC_FREE(frame);
1370 if (!NT_STATUS_IS_OK(status)) {
1371 cli_set_error(cli, status);
1372 }
1373 return status;
1374 }
Tomato firmware and modifications.