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ntdbdump.8.xml: Bump version up to 4.1.
[Samba.git] / source3 / libsmb / clireadwrite.c
blob47e7f1bfd4c65880df772d3f68397fab80715733
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 #include "libsmb/libsmb.h"
22 #include "../lib/util/tevent_ntstatus.h"
23 #include "async_smb.h"
24 #include "trans2.h"
25 #include "../libcli/smb/smbXcli_base.h"
26
27 /****************************************************************************
28 Calculate the recommended read buffer size
29 ****************************************************************************/
30 static size_t cli_read_max_bufsize(struct cli_state *cli)
31 {
32 uint8_t wct = 12;
33 uint32_t min_space;
34 uint32_t data_offset;
35 uint32_t useable_space = 0;
36
37 data_offset = HDR_VWV;
38 data_offset += wct * sizeof(uint16_t);
39 data_offset += sizeof(uint16_t); /* byte count */
40 data_offset += 1; /* pad */
41
42 min_space = cli_state_available_size(cli, data_offset);
43
44 if (cli->server_posix_capabilities & CIFS_UNIX_LARGE_READ_CAP) {
45 useable_space = 0xFFFFFF - data_offset;
46
47 if (smb1cli_conn_signing_is_active(cli->conn)) {
48 return min_space;
49 }
50
51 if (smb1cli_conn_encryption_on(cli->conn)) {
52 return min_space;
53 }
54
55 return useable_space;
56 } else if (smb1cli_conn_capabilities(cli->conn) & CAP_LARGE_READX) {
57 /*
58 * Note: CAP_LARGE_READX also works with signing
59 */
60 useable_space = 0x1FFFF - data_offset;
61
62 useable_space = MIN(useable_space, UINT16_MAX);
63
64 return useable_space;
65 }
66
67 return min_space;
68 }
69
70 /****************************************************************************
71 Calculate the recommended write buffer size
72 ****************************************************************************/
73 static size_t cli_write_max_bufsize(struct cli_state *cli,
74 uint16_t write_mode,
75 uint8_t wct)
76 {
77 uint32_t min_space;
78 uint32_t data_offset;
79 uint32_t useable_space = 0;
80
81 data_offset = HDR_VWV;
82 data_offset += wct * sizeof(uint16_t);
83 data_offset += sizeof(uint16_t); /* byte count */
84 data_offset += 1; /* pad */
85
86 min_space = cli_state_available_size(cli, data_offset);
87
88 if (cli->server_posix_capabilities & CIFS_UNIX_LARGE_WRITE_CAP) {
89 useable_space = 0xFFFFFF - data_offset;
90 } else if (smb1cli_conn_capabilities(cli->conn) & CAP_LARGE_WRITEX) {
91 useable_space = 0x1FFFF - data_offset;
92 } else {
93 return min_space;
94 }
95
96 if (write_mode != 0) {
97 return min_space;
98 }
99
100 if (smb1cli_conn_signing_is_active(cli->conn)) {
101 return min_space;
102 }
103
104 if (smb1cli_conn_encryption_on(cli->conn)) {
105 return min_space;
106 }
107
108 if (strequal(cli->dev, "LPT1:")) {
109 return min_space;
110 }
111
112 return useable_space;
113 }
114
115 struct cli_read_andx_state {
116 size_t size;
117 uint16_t vwv[12];
118 NTSTATUS status;
119 size_t received;
120 uint8_t *buf;
121 };
122
123 static void cli_read_andx_done(struct tevent_req *subreq);
124
125 struct tevent_req *cli_read_andx_create(TALLOC_CTX *mem_ctx,
126 struct tevent_context *ev,
127 struct cli_state *cli, uint16_t fnum,
128 off_t offset, size_t size,
129 struct tevent_req **psmbreq)
130 {
131 struct tevent_req *req, *subreq;
132 struct cli_read_andx_state *state;
133 uint8_t wct = 10;
134
135 req = tevent_req_create(mem_ctx, &state, struct cli_read_andx_state);
136 if (req == NULL) {
137 return NULL;
138 }
139 state->size = size;
140
141 SCVAL(state->vwv + 0, 0, 0xFF);
142 SCVAL(state->vwv + 0, 1, 0);
143 SSVAL(state->vwv + 1, 0, 0);
144 SSVAL(state->vwv + 2, 0, fnum);
145 SIVAL(state->vwv + 3, 0, offset);
146 SSVAL(state->vwv + 5, 0, size);
147 SSVAL(state->vwv + 6, 0, size);
148 SSVAL(state->vwv + 7, 0, (size >> 16));
149 SSVAL(state->vwv + 8, 0, 0);
150 SSVAL(state->vwv + 9, 0, 0);
151
152 if (smb1cli_conn_capabilities(cli->conn) & CAP_LARGE_FILES) {
153 SIVAL(state->vwv + 10, 0,
154 (((uint64_t)offset)>>32) & 0xffffffff);
155 wct = 12;
156 } else {
157 if ((((uint64_t)offset) & 0xffffffff00000000LL) != 0) {
158 DEBUG(10, ("cli_read_andx_send got large offset where "
159 "the server does not support it\n"));
160 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
161 return tevent_req_post(req, ev);
162 }
163 }
164
165 subreq = cli_smb_req_create(state, ev, cli, SMBreadX, 0, wct,
166 state->vwv, 0, NULL);
167 if (subreq == NULL) {
168 TALLOC_FREE(req);
169 return NULL;
170 }
171 tevent_req_set_callback(subreq, cli_read_andx_done, req);
172 *psmbreq = subreq;
173 return req;
174 }
175
176 struct tevent_req *cli_read_andx_send(TALLOC_CTX *mem_ctx,
177 struct tevent_context *ev,
178 struct cli_state *cli, uint16_t fnum,
179 off_t offset, size_t size)
180 {
181 struct tevent_req *req, *subreq;
182 NTSTATUS status;
183
184 req = cli_read_andx_create(mem_ctx, ev, cli, fnum, offset, size,
185 &subreq);
186 if (req == NULL) {
187 return NULL;
188 }
189
190 status = smb1cli_req_chain_submit(&subreq, 1);
191 if (tevent_req_nterror(req, status)) {
192 return tevent_req_post(req, ev);
193 }
194 return req;
195 }
196
197 static void cli_read_andx_done(struct tevent_req *subreq)
198 {
199 struct tevent_req *req = tevent_req_callback_data(
200 subreq, struct tevent_req);
201 struct cli_read_andx_state *state = tevent_req_data(
202 req, struct cli_read_andx_state);
203 uint8_t *inbuf;
204 uint8_t wct;
205 uint16_t *vwv;
206 uint32_t num_bytes;
207 uint8_t *bytes;
208
209 state->status = cli_smb_recv(subreq, state, &inbuf, 12, &wct, &vwv,
210 &num_bytes, &bytes);
211 TALLOC_FREE(subreq);
212 if (NT_STATUS_IS_ERR(state->status)) {
213 tevent_req_nterror(req, state->status);
214 return;
215 }
216
217 /* size is the number of bytes the server returned.
218 * Might be zero. */
219 state->received = SVAL(vwv + 5, 0);
220 state->received |= (((unsigned int)SVAL(vwv + 7, 0)) << 16);
221
222 if (state->received > state->size) {
223 DEBUG(5,("server returned more than we wanted!\n"));
224 tevent_req_nterror(req, NT_STATUS_UNEXPECTED_IO_ERROR);
225 return;
226 }
227
228 /*
229 * bcc field must be valid for small reads, for large reads the 16-bit
230 * bcc field can't be correct.
231 */
232
233 if ((state->received < 0xffff) && (state->received > num_bytes)) {
234 DEBUG(5, ("server announced more bytes than sent\n"));
235 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
236 return;
237 }
238
239 state->buf = discard_const_p(uint8_t, smb_base(inbuf)) + SVAL(vwv+6, 0);
240
241 if (trans_oob(smb_len_tcp(inbuf), SVAL(vwv+6, 0), state->received)
242 || ((state->received != 0) && (state->buf < bytes))) {
243 DEBUG(5, ("server returned invalid read&x data offset\n"));
244 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
245 return;
246 }
247 tevent_req_done(req);
248 }
249
250 /*
251 * Pull the data out of a finished async read_and_x request. rcvbuf is
252 * talloced from the request, so better make sure that you copy it away before
253 * you talloc_free(req). "rcvbuf" is NOT a talloc_ctx of its own, so do not
254 * talloc_move it!
255 */
256
257 NTSTATUS cli_read_andx_recv(struct tevent_req *req, ssize_t *received,
258 uint8_t **rcvbuf)
259 {
260 struct cli_read_andx_state *state = tevent_req_data(
261 req, struct cli_read_andx_state);
262 NTSTATUS status;
263
264 if (tevent_req_is_nterror(req, &status)) {
265 return status;
266 }
267 *received = state->received;
268 *rcvbuf = state->buf;
269 return NT_STATUS_OK;
270 }
271
272 struct cli_readall_state {
273 struct tevent_context *ev;
274 struct cli_state *cli;
275 uint16_t fnum;
276 off_t start_offset;
277 size_t size;
278 size_t received;
279 uint8_t *buf;
280 };
281
282 static void cli_readall_done(struct tevent_req *subreq);
283
284 static struct tevent_req *cli_readall_send(TALLOC_CTX *mem_ctx,
285 struct tevent_context *ev,
286 struct cli_state *cli,
287 uint16_t fnum,
288 off_t offset, size_t size)
289 {
290 struct tevent_req *req, *subreq;
291 struct cli_readall_state *state;
292
293 req = tevent_req_create(mem_ctx, &state, struct cli_readall_state);
294 if (req == NULL) {
295 return NULL;
296 }
297 state->ev = ev;
298 state->cli = cli;
299 state->fnum = fnum;
300 state->start_offset = offset;
301 state->size = size;
302 state->received = 0;
303 state->buf = NULL;
304
305 subreq = cli_read_andx_send(state, ev, cli, fnum, offset, size);
306 if (tevent_req_nomem(subreq, req)) {
307 return tevent_req_post(req, ev);
308 }
309 tevent_req_set_callback(subreq, cli_readall_done, req);
310 return req;
311 }
312
313 static void cli_readall_done(struct tevent_req *subreq)
314 {
315 struct tevent_req *req = tevent_req_callback_data(
316 subreq, struct tevent_req);
317 struct cli_readall_state *state = tevent_req_data(
318 req, struct cli_readall_state);
319 ssize_t received;
320 uint8_t *buf;
321 NTSTATUS status;
322
323 status = cli_read_andx_recv(subreq, &received, &buf);
324 if (tevent_req_nterror(req, status)) {
325 return;
326 }
327
328 if (received == 0) {
329 /* EOF */
330 tevent_req_done(req);
331 return;
332 }
333
334 if ((state->received == 0) && (received == state->size)) {
335 /* Ideal case: Got it all in one run */
336 state->buf = buf;
337 state->received += received;
338 tevent_req_done(req);
339 return;
340 }
341
342 /*
343 * We got a short read, issue a read for the
344 * rest. Unfortunately we have to allocate the buffer
345 * ourselves now, as our caller expects to receive a single
346 * buffer. cli_read_andx does it from the buffer received from
347 * the net, but with a short read we have to put it together
348 * from several reads.
349 */
350
351 if (state->buf == NULL) {
352 state->buf = talloc_array(state, uint8_t, state->size);
353 if (tevent_req_nomem(state->buf, req)) {
354 return;
355 }
356 }
357 memcpy(state->buf + state->received, buf, received);
358 state->received += received;
359
360 TALLOC_FREE(subreq);
361
362 if (state->received >= state->size) {
363 tevent_req_done(req);
364 return;
365 }
366
367 subreq = cli_read_andx_send(state, state->ev, state->cli, state->fnum,
368 state->start_offset + state->received,
369 state->size - state->received);
370 if (tevent_req_nomem(subreq, req)) {
371 return;
372 }
373 tevent_req_set_callback(subreq, cli_readall_done, req);
374 }
375
376 static NTSTATUS cli_readall_recv(struct tevent_req *req, ssize_t *received,
377 uint8_t **rcvbuf)
378 {
379 struct cli_readall_state *state = tevent_req_data(
380 req, struct cli_readall_state);
381 NTSTATUS status;
382
383 if (tevent_req_is_nterror(req, &status)) {
384 return status;
385 }
386 *received = state->received;
387 *rcvbuf = state->buf;
388 return NT_STATUS_OK;
389 }
390
391 struct cli_pull_subreq {
392 struct tevent_req *req;
393 ssize_t received;
394 uint8_t *buf;
395 };
396
397 /*
398 * Parallel read support.
399 *
400 * cli_pull sends as many read&x requests as the server would allow via
401 * max_mux at a time. When replies flow back in, the data is written into
402 * the callback function "sink" in the right order.
403 */
404
405 struct cli_pull_state {
406 struct tevent_req *req;
407
408 struct tevent_context *ev;
409 struct cli_state *cli;
410 uint16_t fnum;
411 off_t start_offset;
412 off_t size;
413
414 NTSTATUS (*sink)(char *buf, size_t n, void *priv);
415 void *priv;
416
417 size_t chunk_size;
418
419 /*
420 * Outstanding requests
421 */
422 uint16_t max_reqs;
423 int num_reqs;
424 struct cli_pull_subreq *reqs;
425
426 /*
427 * For how many bytes did we send requests already?
428 */
429 off_t requested;
430
431 /*
432 * Next request index to push into "sink". This walks around the "req"
433 * array, taking care that the requests are pushed to "sink" in the
434 * right order. If necessary (i.e. replies don't come in in the right
435 * order), replies are held back in "reqs".
436 */
437 int top_req;
438
439 /*
440 * How many bytes did we push into "sink"?
441 */
442
443 off_t pushed;
444 };
445
446 static char *cli_pull_print(struct tevent_req *req, TALLOC_CTX *mem_ctx)
447 {
448 struct cli_pull_state *state = tevent_req_data(
449 req, struct cli_pull_state);
450 char *result;
451
452 result = tevent_req_default_print(req, mem_ctx);
453 if (result == NULL) {
454 return NULL;
455 }
456
457 return talloc_asprintf_append_buffer(
458 result, "num_reqs=%d, top_req=%d",
459 state->num_reqs, state->top_req);
460 }
461
462 static void cli_pull_read_done(struct tevent_req *read_req);
463
464 /*
465 * Prepare an async pull request
466 */
467
468 struct tevent_req *cli_pull_send(TALLOC_CTX *mem_ctx,
469 struct tevent_context *ev,
470 struct cli_state *cli,
471 uint16_t fnum, off_t start_offset,
472 off_t size, size_t window_size,
473 NTSTATUS (*sink)(char *buf, size_t n,
474 void *priv),
475 void *priv)
476 {
477 struct tevent_req *req;
478 struct cli_pull_state *state;
479 int i;
480 size_t page_size = 1024;
481
482 req = tevent_req_create(mem_ctx, &state, struct cli_pull_state);
483 if (req == NULL) {
484 return NULL;
485 }
486 tevent_req_set_print_fn(req, cli_pull_print);
487 state->req = req;
488
489 state->cli = cli;
490 state->ev = ev;
491 state->fnum = fnum;
492 state->start_offset = start_offset;
493 state->size = size;
494 state->sink = sink;
495 state->priv = priv;
496
497 state->pushed = 0;
498 state->top_req = 0;
499
500 if (size == 0) {
501 tevent_req_done(req);
502 return tevent_req_post(req, ev);
503 }
504
505 state->chunk_size = cli_read_max_bufsize(cli);
506 if (state->chunk_size > page_size) {
507 state->chunk_size &= ~(page_size - 1);
508 }
509
510 state->max_reqs = smbXcli_conn_max_requests(cli->conn);
511
512 state->num_reqs = MAX(window_size/state->chunk_size, 1);
513 state->num_reqs = MIN(state->num_reqs, state->max_reqs);
514
515 state->reqs = talloc_zero_array(state, struct cli_pull_subreq,
516 state->num_reqs);
517 if (state->reqs == NULL) {
518 goto failed;
519 }
520
521 state->requested = 0;
522
523 for (i=0; i<state->num_reqs; i++) {
524 struct cli_pull_subreq *subreq = &state->reqs[i];
525 off_t size_left;
526 size_t request_thistime;
527
528 if (state->requested >= size) {
529 state->num_reqs = i;
530 break;
531 }
532
533 size_left = size - state->requested;
534 request_thistime = MIN(size_left, state->chunk_size);
535
536 subreq->req = cli_readall_send(
537 state->reqs, ev, cli, fnum,
538 state->start_offset + state->requested,
539 request_thistime);
540
541 if (subreq->req == NULL) {
542 goto failed;
543 }
544 tevent_req_set_callback(subreq->req, cli_pull_read_done, req);
545 state->requested += request_thistime;
546 }
547 return req;
548
549 failed:
550 TALLOC_FREE(req);
551 return NULL;
552 }
553
554 /*
555 * Handle incoming read replies, push the data into sink and send out new
556 * requests if necessary.
557 */
558
559 static void cli_pull_read_done(struct tevent_req *subreq)
560 {
561 struct tevent_req *req = tevent_req_callback_data(
562 subreq, struct tevent_req);
563 struct cli_pull_state *state = tevent_req_data(
564 req, struct cli_pull_state);
565 struct cli_pull_subreq *pull_subreq = NULL;
566 NTSTATUS status;
567 int i;
568
569 for (i = 0; i < state->num_reqs; i++) {
570 pull_subreq = &state->reqs[i];
571 if (subreq == pull_subreq->req) {
572 break;
573 }
574 }
575 if (i == state->num_reqs) {
576 /* Huh -- received something we did not send?? */
577 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
578 return;
579 }
580
581 status = cli_readall_recv(subreq, &pull_subreq->received,
582 &pull_subreq->buf);
583 if (!NT_STATUS_IS_OK(status)) {
584 tevent_req_nterror(state->req, status);
585 return;
586 }
587
588 /*
589 * This loop is the one to take care of out-of-order replies. All
590 * pending requests are in state->reqs, state->reqs[top_req] is the
591 * one that is to be pushed next. If however a request later than
592 * top_req is replied to, then we can't push yet. If top_req is
593 * replied to at a later point then, we need to push all the finished
594 * requests.
595 */
596
597 while (state->reqs[state->top_req].req != NULL) {
598 struct cli_pull_subreq *top_subreq;
599
600 DEBUG(11, ("cli_pull_read_done: top_req = %d\n",
601 state->top_req));
602
603 top_subreq = &state->reqs[state->top_req];
604
605 if (tevent_req_is_in_progress(top_subreq->req)) {
606 DEBUG(11, ("cli_pull_read_done: top request not yet "
607 "done\n"));
608 return;
609 }
610
611 DEBUG(10, ("cli_pull_read_done: Pushing %d bytes, %d already "
612 "pushed\n", (int)top_subreq->received,
613 (int)state->pushed));
614
615 status = state->sink((char *)top_subreq->buf,
616 top_subreq->received, state->priv);
617 if (tevent_req_nterror(state->req, status)) {
618 return;
619 }
620 state->pushed += top_subreq->received;
621
622 TALLOC_FREE(state->reqs[state->top_req].req);
623
624 if (state->requested < state->size) {
625 struct tevent_req *new_req;
626 off_t size_left;
627 size_t request_thistime;
628
629 size_left = state->size - state->requested;
630 request_thistime = MIN(size_left, state->chunk_size);
631
632 DEBUG(10, ("cli_pull_read_done: Requesting %d bytes "
633 "at %d, position %d\n",
634 (int)request_thistime,
635 (int)(state->start_offset
636 + state->requested),
637 state->top_req));
638
639 new_req = cli_readall_send(
640 state->reqs, state->ev, state->cli,
641 state->fnum,
642 state->start_offset + state->requested,
643 request_thistime);
644
645 if (tevent_req_nomem(new_req, state->req)) {
646 return;
647 }
648 tevent_req_set_callback(new_req, cli_pull_read_done,
649 req);
650
651 state->reqs[state->top_req].req = new_req;
652 state->requested += request_thistime;
653 }
654
655 state->top_req = (state->top_req+1) % state->num_reqs;
656 }
657
658 tevent_req_done(req);
659 }
660
661 NTSTATUS cli_pull_recv(struct tevent_req *req, off_t *received)
662 {
663 struct cli_pull_state *state = tevent_req_data(
664 req, struct cli_pull_state);
665 NTSTATUS status;
666
667 if (tevent_req_is_nterror(req, &status)) {
668 return status;
669 }
670 *received = state->pushed;
671 return NT_STATUS_OK;
672 }
673
674 NTSTATUS cli_pull(struct cli_state *cli, uint16_t fnum,
675 off_t start_offset, off_t size, size_t window_size,
676 NTSTATUS (*sink)(char *buf, size_t n, void *priv),
677 void *priv, off_t *received)
678 {
679 TALLOC_CTX *frame = talloc_stackframe();
680 struct tevent_context *ev;
681 struct tevent_req *req;
682 NTSTATUS status = NT_STATUS_OK;
683
684 if (smbXcli_conn_has_async_calls(cli->conn)) {
685 /*
686 * Can't use sync call while an async call is in flight
687 */
688 status = NT_STATUS_INVALID_PARAMETER;
689 goto fail;
690 }
691
692 ev = samba_tevent_context_init(frame);
693 if (ev == NULL) {
694 status = NT_STATUS_NO_MEMORY;
695 goto fail;
696 }
697
698 req = cli_pull_send(frame, ev, cli, fnum, start_offset, size,
699 window_size, sink, priv);
700 if (req == NULL) {
701 status = NT_STATUS_NO_MEMORY;
702 goto fail;
703 }
704
705 if (!tevent_req_poll(req, ev)) {
706 status = map_nt_error_from_unix(errno);
707 goto fail;
708 }
709
710 status = cli_pull_recv(req, received);
711 fail:
712 TALLOC_FREE(frame);
713 return status;
714 }
715
716 static NTSTATUS cli_read_sink(char *buf, size_t n, void *priv)
717 {
718 char **pbuf = (char **)priv;
719 memcpy(*pbuf, buf, n);
720 *pbuf += n;
721 return NT_STATUS_OK;
722 }
723
724 NTSTATUS cli_read(struct cli_state *cli, uint16_t fnum,
725 char *buf, off_t offset, size_t size,
726 size_t *nread)
727 {
728 NTSTATUS status;
729 off_t ret;
730
731 status = cli_pull(cli, fnum, offset, size, size,
732 cli_read_sink, &buf, &ret);
733 if (!NT_STATUS_IS_OK(status)) {
734 return status;
735 }
736
737 if (nread) {
738 *nread = ret;
739 }
740
741 return NT_STATUS_OK;
742 }
743
744 /****************************************************************************
745 write to a file using a SMBwrite and not bypassing 0 byte writes
746 ****************************************************************************/
747
748 NTSTATUS cli_smbwrite(struct cli_state *cli, uint16_t fnum, char *buf,
749 off_t offset, size_t size1, size_t *ptotal)
750 {
751 uint8_t *bytes;
752 ssize_t total = 0;
753
754 /*
755 * 3 bytes prefix
756 */
757
758 bytes = talloc_array(talloc_tos(), uint8_t, 3);
759 if (bytes == NULL) {
760 return NT_STATUS_NO_MEMORY;
761 }
762 bytes[0] = 1;
763
764 do {
765 uint32_t usable_space = cli_state_available_size(cli, 48);
766 size_t size = MIN(size1, usable_space);
767 struct tevent_req *req;
768 uint16_t vwv[5];
769 uint16_t *ret_vwv;
770 NTSTATUS status;
771
772 SSVAL(vwv+0, 0, fnum);
773 SSVAL(vwv+1, 0, size);
774 SIVAL(vwv+2, 0, offset);
775 SSVAL(vwv+4, 0, 0);
776
777 bytes = talloc_realloc(talloc_tos(), bytes, uint8_t,
778 size+3);
779 if (bytes == NULL) {
780 return NT_STATUS_NO_MEMORY;
781 }
782 SSVAL(bytes, 1, size);
783 memcpy(bytes + 3, buf + total, size);
784
785 status = cli_smb(talloc_tos(), cli, SMBwrite, 0, 5, vwv,
786 size+3, bytes, &req, 1, NULL, &ret_vwv,
787 NULL, NULL);
788 if (!NT_STATUS_IS_OK(status)) {
789 TALLOC_FREE(bytes);
790 return status;
791 }
792
793 size = SVAL(ret_vwv+0, 0);
794 TALLOC_FREE(req);
795 if (size == 0) {
796 break;
797 }
798 size1 -= size;
799 total += size;
800 offset += size;
801
802 } while (size1);
803
804 TALLOC_FREE(bytes);
805
806 if (ptotal != NULL) {
807 *ptotal = total;
808 }
809 return NT_STATUS_OK;
810 }
811
812 /*
813 * Send a write&x request
814 */
815
816 struct cli_write_andx_state {
817 size_t size;
818 uint16_t vwv[14];
819 size_t written;
820 uint8_t pad;
821 struct iovec iov[2];
822 };
823
824 static void cli_write_andx_done(struct tevent_req *subreq);
825
826 struct tevent_req *cli_write_andx_create(TALLOC_CTX *mem_ctx,
827 struct tevent_context *ev,
828 struct cli_state *cli, uint16_t fnum,
829 uint16_t mode, const uint8_t *buf,
830 off_t offset, size_t size,
831 struct tevent_req **reqs_before,
832 int num_reqs_before,
833 struct tevent_req **psmbreq)
834 {
835 struct tevent_req *req, *subreq;
836 struct cli_write_andx_state *state;
837 bool bigoffset = ((smb1cli_conn_capabilities(cli->conn) & CAP_LARGE_FILES) != 0);
838 uint8_t wct = bigoffset ? 14 : 12;
839 size_t max_write = cli_write_max_bufsize(cli, mode, wct);
840 uint16_t *vwv;
841
842 req = tevent_req_create(mem_ctx, &state, struct cli_write_andx_state);
843 if (req == NULL) {
844 return NULL;
845 }
846
847 state->size = MIN(size, max_write);
848
849 vwv = state->vwv;
850
851 SCVAL(vwv+0, 0, 0xFF);
852 SCVAL(vwv+0, 1, 0);
853 SSVAL(vwv+1, 0, 0);
854 SSVAL(vwv+2, 0, fnum);
855 SIVAL(vwv+3, 0, offset);
856 SIVAL(vwv+5, 0, 0);
857 SSVAL(vwv+7, 0, mode);
858 SSVAL(vwv+8, 0, 0);
859 SSVAL(vwv+9, 0, (state->size>>16));
860 SSVAL(vwv+10, 0, state->size);
861
862 SSVAL(vwv+11, 0,
863 smb1cli_req_wct_ofs(reqs_before, num_reqs_before)
864 + 1 /* the wct field */
865 + wct * 2 /* vwv */
866 + 2 /* num_bytes field */
867 + 1 /* pad */);
868
869 if (bigoffset) {
870 SIVAL(vwv+12, 0, (((uint64_t)offset)>>32) & 0xffffffff);
871 }
872
873 state->pad = 0;
874 state->iov[0].iov_base = (void *)&state->pad;
875 state->iov[0].iov_len = 1;
876 state->iov[1].iov_base = discard_const_p(void, buf);
877 state->iov[1].iov_len = state->size;
878
879 subreq = cli_smb_req_create(state, ev, cli, SMBwriteX, 0, wct, vwv,
880 2, state->iov);
881 if (tevent_req_nomem(subreq, req)) {
882 return tevent_req_post(req, ev);
883 }
884 tevent_req_set_callback(subreq, cli_write_andx_done, req);
885 *psmbreq = subreq;
886 return req;
887 }
888
889 struct tevent_req *cli_write_andx_send(TALLOC_CTX *mem_ctx,
890 struct tevent_context *ev,
891 struct cli_state *cli, uint16_t fnum,
892 uint16_t mode, const uint8_t *buf,
893 off_t offset, size_t size)
894 {
895 struct tevent_req *req, *subreq;
896 NTSTATUS status;
897
898 req = cli_write_andx_create(mem_ctx, ev, cli, fnum, mode, buf, offset,
899 size, NULL, 0, &subreq);
900 if (req == NULL) {
901 return NULL;
902 }
903
904 status = smb1cli_req_chain_submit(&subreq, 1);
905 if (tevent_req_nterror(req, status)) {
906 return tevent_req_post(req, ev);
907 }
908 return req;
909 }
910
911 static void cli_write_andx_done(struct tevent_req *subreq)
912 {
913 struct tevent_req *req = tevent_req_callback_data(
914 subreq, struct tevent_req);
915 struct cli_write_andx_state *state = tevent_req_data(
916 req, struct cli_write_andx_state);
917 uint8_t wct;
918 uint16_t *vwv;
919 NTSTATUS status;
920
921 status = cli_smb_recv(subreq, state, NULL, 6, &wct, &vwv,
922 NULL, NULL);
923 TALLOC_FREE(subreq);
924 if (NT_STATUS_IS_ERR(status)) {
925 tevent_req_nterror(req, status);
926 return;
927 }
928 state->written = SVAL(vwv+2, 0);
929 if (state->size > UINT16_MAX) {
930 /*
931 * It is important that we only set the
932 * high bits only if we asked for a large write.
933 *
934 * OS/2 print shares get this wrong and may send
935 * invalid values.
936 *
937 * See bug #5326.
938 */
939 state->written |= SVAL(vwv+4, 0)<<16;
940 }
941 tevent_req_done(req);
942 }
943
944 NTSTATUS cli_write_andx_recv(struct tevent_req *req, size_t *pwritten)
945 {
946 struct cli_write_andx_state *state = tevent_req_data(
947 req, struct cli_write_andx_state);
948 NTSTATUS status;
949
950 if (tevent_req_is_nterror(req, &status)) {
951 return status;
952 }
953 if (pwritten != 0) {
954 *pwritten = state->written;
955 }
956 return NT_STATUS_OK;
957 }
958
959 struct cli_writeall_state {
960 struct tevent_context *ev;
961 struct cli_state *cli;
962 uint16_t fnum;
963 uint16_t mode;
964 const uint8_t *buf;
965 off_t offset;
966 size_t size;
967 size_t written;
968 };
969
970 static void cli_writeall_written(struct tevent_req *req);
971
972 static struct tevent_req *cli_writeall_send(TALLOC_CTX *mem_ctx,
973 struct tevent_context *ev,
974 struct cli_state *cli,
975 uint16_t fnum,
976 uint16_t mode,
977 const uint8_t *buf,
978 off_t offset, size_t size)
979 {
980 struct tevent_req *req, *subreq;
981 struct cli_writeall_state *state;
982
983 req = tevent_req_create(mem_ctx, &state, struct cli_writeall_state);
984 if (req == NULL) {
985 return NULL;
986 }
987 state->ev = ev;
988 state->cli = cli;
989 state->fnum = fnum;
990 state->mode = mode;
991 state->buf = buf;
992 state->offset = offset;
993 state->size = size;
994 state->written = 0;
995
996 subreq = cli_write_andx_send(state, state->ev, state->cli, state->fnum,
997 state->mode, state->buf, state->offset,
998 state->size);
999 if (tevent_req_nomem(subreq, req)) {
1000 return tevent_req_post(req, ev);
1001 }
1002 tevent_req_set_callback(subreq, cli_writeall_written, req);
1003 return req;
1004 }
1005
1006 static void cli_writeall_written(struct tevent_req *subreq)
1007 {
1008 struct tevent_req *req = tevent_req_callback_data(
1009 subreq, struct tevent_req);
1010 struct cli_writeall_state *state = tevent_req_data(
1011 req, struct cli_writeall_state);
1012 NTSTATUS status;
1013 size_t written, to_write;
1014
1015 status = cli_write_andx_recv(subreq, &written);
1016 TALLOC_FREE(subreq);
1017 if (tevent_req_nterror(req, status)) {
1018 return;
1019 }
1020
1021 state->written += written;
1022
1023 if (state->written > state->size) {
1024 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
1025 return;
1026 }
1027
1028 to_write = state->size - state->written;
1029
1030 if (to_write == 0) {
1031 tevent_req_done(req);
1032 return;
1033 }
1034
1035 subreq = cli_write_andx_send(state, state->ev, state->cli, state->fnum,
1036 state->mode,
1037 state->buf + state->written,
1038 state->offset + state->written, to_write);
1039 if (tevent_req_nomem(subreq, req)) {
1040 return;
1041 }
1042 tevent_req_set_callback(subreq, cli_writeall_written, req);
1043 }
1044
1045 static NTSTATUS cli_writeall_recv(struct tevent_req *req,
1046 size_t *pwritten)
1047 {
1048 struct cli_writeall_state *state = tevent_req_data(
1049 req, struct cli_writeall_state);
1050 NTSTATUS status;
1051
1052 if (tevent_req_is_nterror(req, &status)) {
1053 return status;
1054 }
1055 if (pwritten != NULL) {
1056 *pwritten = state->written;
1057 }
1058 return NT_STATUS_OK;
1059 }
1060
1061 NTSTATUS cli_writeall(struct cli_state *cli, uint16_t fnum, uint16_t mode,
1062 const uint8_t *buf, off_t offset, size_t size,
1063 size_t *pwritten)
1064 {
1065 TALLOC_CTX *frame = talloc_stackframe();
1066 struct tevent_context *ev;
1067 struct tevent_req *req;
1068 NTSTATUS status = NT_STATUS_NO_MEMORY;
1069
1070 if (smbXcli_conn_has_async_calls(cli->conn)) {
1071 /*
1072 * Can't use sync call while an async call is in flight
1073 */
1074 status = NT_STATUS_INVALID_PARAMETER;
1075 goto fail;
1076 }
1077 ev = samba_tevent_context_init(frame);
1078 if (ev == NULL) {
1079 goto fail;
1080 }
1081 req = cli_writeall_send(frame, ev, cli, fnum, mode, buf, offset, size);
1082 if (req == NULL) {
1083 goto fail;
1084 }
1085 if (!tevent_req_poll(req, ev)) {
1086 status = map_nt_error_from_unix(errno);
1087 goto fail;
1088 }
1089 status = cli_writeall_recv(req, pwritten);
1090 fail:
1091 TALLOC_FREE(frame);
1092 return status;
1093 }
1094
1095 struct cli_push_write_state {
1096 struct tevent_req *req;/* This is the main request! Not the subreq */
1097 uint32_t idx;
1098 off_t ofs;
1099 uint8_t *buf;
1100 size_t size;
1101 };
1102
1103 struct cli_push_state {
1104 struct tevent_context *ev;
1105 struct cli_state *cli;
1106 uint16_t fnum;
1107 uint16_t mode;
1108 off_t start_offset;
1109 size_t window_size;
1110
1111 size_t (*source)(uint8_t *buf, size_t n, void *priv);
1112 void *priv;
1113
1114 bool eof;
1115
1116 size_t chunk_size;
1117 off_t next_offset;
1118
1119 /*
1120 * Outstanding requests
1121 */
1122 uint32_t pending;
1123 uint16_t max_reqs;
1124 uint32_t num_reqs;
1125 struct cli_push_write_state **reqs;
1126 };
1127
1128 static void cli_push_written(struct tevent_req *req);
1129
1130 static bool cli_push_write_setup(struct tevent_req *req,
1131 struct cli_push_state *state,
1132 uint32_t idx)
1133 {
1134 struct cli_push_write_state *substate;
1135 struct tevent_req *subreq;
1136
1137 substate = talloc(state->reqs, struct cli_push_write_state);
1138 if (!substate) {
1139 return false;
1140 }
1141 substate->req = req;
1142 substate->idx = idx;
1143 substate->ofs = state->next_offset;
1144 substate->buf = talloc_array(substate, uint8_t, state->chunk_size);
1145 if (!substate->buf) {
1146 talloc_free(substate);
1147 return false;
1148 }
1149 substate->size = state->source(substate->buf,
1150 state->chunk_size,
1151 state->priv);
1152 if (substate->size == 0) {
1153 state->eof = true;
1154 /* nothing to send */
1155 talloc_free(substate);
1156 return true;
1157 }
1158
1159 subreq = cli_writeall_send(substate,
1160 state->ev, state->cli,
1161 state->fnum, state->mode,
1162 substate->buf,
1163 substate->ofs,
1164 substate->size);
1165 if (!subreq) {
1166 talloc_free(substate);
1167 return false;
1168 }
1169 tevent_req_set_callback(subreq, cli_push_written, substate);
1170
1171 state->reqs[idx] = substate;
1172 state->pending += 1;
1173 state->next_offset += substate->size;
1174
1175 return true;
1176 }
1177
1178 struct tevent_req *cli_push_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev,
1179 struct cli_state *cli,
1180 uint16_t fnum, uint16_t mode,
1181 off_t start_offset, size_t window_size,
1182 size_t (*source)(uint8_t *buf, size_t n,
1183 void *priv),
1184 void *priv)
1185 {
1186 struct tevent_req *req;
1187 struct cli_push_state *state;
1188 uint32_t i;
1189 size_t page_size = 1024;
1190
1191 req = tevent_req_create(mem_ctx, &state, struct cli_push_state);
1192 if (req == NULL) {
1193 return NULL;
1194 }
1195 state->cli = cli;
1196 state->ev = ev;
1197 state->fnum = fnum;
1198 state->start_offset = start_offset;
1199 state->mode = mode;
1200 state->source = source;
1201 state->priv = priv;
1202 state->eof = false;
1203 state->pending = 0;
1204 state->next_offset = start_offset;
1205
1206 state->chunk_size = cli_write_max_bufsize(cli, mode, 14);
1207 if (state->chunk_size > page_size) {
1208 state->chunk_size &= ~(page_size - 1);
1209 }
1210
1211 state->max_reqs = smbXcli_conn_max_requests(cli->conn);
1212
1213 if (window_size == 0) {
1214 window_size = state->max_reqs * state->chunk_size;
1215 }
1216 state->num_reqs = window_size/state->chunk_size;
1217 if ((window_size % state->chunk_size) > 0) {
1218 state->num_reqs += 1;
1219 }
1220 state->num_reqs = MIN(state->num_reqs, state->max_reqs);
1221 state->num_reqs = MAX(state->num_reqs, 1);
1222
1223 state->reqs = talloc_zero_array(state, struct cli_push_write_state *,
1224 state->num_reqs);
1225 if (state->reqs == NULL) {
1226 goto failed;
1227 }
1228
1229 for (i=0; i<state->num_reqs; i++) {
1230 if (!cli_push_write_setup(req, state, i)) {
1231 goto failed;
1232 }
1233
1234 if (state->eof) {
1235 break;
1236 }
1237 }
1238
1239 if (state->pending == 0) {
1240 tevent_req_done(req);
1241 return tevent_req_post(req, ev);
1242 }
1243
1244 return req;
1245
1246 failed:
1247 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1248 return tevent_req_post(req, ev);
1249 }
1250
1251 static void cli_push_written(struct tevent_req *subreq)
1252 {
1253 struct cli_push_write_state *substate = tevent_req_callback_data(
1254 subreq, struct cli_push_write_state);
1255 struct tevent_req *req = substate->req;
1256 struct cli_push_state *state = tevent_req_data(
1257 req, struct cli_push_state);
1258 NTSTATUS status;
1259 uint32_t idx = substate->idx;
1260
1261 state->reqs[idx] = NULL;
1262 state->pending -= 1;
1263
1264 status = cli_writeall_recv(subreq, NULL);
1265 TALLOC_FREE(subreq);
1266 TALLOC_FREE(substate);
1267 if (tevent_req_nterror(req, status)) {
1268 return;
1269 }
1270
1271 if (!state->eof) {
1272 if (!cli_push_write_setup(req, state, idx)) {
1273 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1274 return;
1275 }
1276 }
1277
1278 if (state->pending == 0) {
1279 tevent_req_done(req);
1280 return;
1281 }
1282 }
1283
1284 NTSTATUS cli_push_recv(struct tevent_req *req)
1285 {
1286 return tevent_req_simple_recv_ntstatus(req);
1287 }
1288
1289 NTSTATUS cli_push(struct cli_state *cli, uint16_t fnum, uint16_t mode,
1290 off_t start_offset, size_t window_size,
1291 size_t (*source)(uint8_t *buf, size_t n, void *priv),
1292 void *priv)
1293 {
1294 TALLOC_CTX *frame = talloc_stackframe();
1295 struct tevent_context *ev;
1296 struct tevent_req *req;
1297 NTSTATUS status = NT_STATUS_OK;
1298
1299 if (smbXcli_conn_has_async_calls(cli->conn)) {
1300 /*
1301 * Can't use sync call while an async call is in flight
1302 */
1303 status = NT_STATUS_INVALID_PARAMETER;
1304 goto fail;
1305 }
1306
1307 ev = samba_tevent_context_init(frame);
1308 if (ev == NULL) {
1309 status = NT_STATUS_NO_MEMORY;
1310 goto fail;
1311 }
1312
1313 req = cli_push_send(frame, ev, cli, fnum, mode, start_offset,
1314 window_size, source, priv);
1315 if (req == NULL) {
1316 status = NT_STATUS_NO_MEMORY;
1317 goto fail;
1318 }
1319
1320 if (!tevent_req_poll(req, ev)) {
1321 status = map_nt_error_from_unix(errno);
1322 goto fail;
1323 }
1324
1325 status = cli_push_recv(req);
1326 fail:
1327 TALLOC_FREE(frame);
1328 return status;
1329 }
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