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Get medieval on our ass about SMB1 file descriptors being 16 bits, not an int.
[Samba/gebeck_regimport.git] / source3 / libsmb / clireadwrite.c
blob07d438fd258491caf0b10097ddfc406415c4bc21
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 bool bigoffset = False;
92 uint8_t wct = 10;
93
94 if (size > cli_read_max_bufsize(cli)) {
95 DEBUG(0, ("cli_read_andx_send got size=%d, can only handle "
96 "size=%d\n", (int)size,
97 (int)cli_read_max_bufsize(cli)));
98 return NULL;
99 }
100
101 req = tevent_req_create(mem_ctx, &state, struct cli_read_andx_state);
102 if (req == NULL) {
103 return NULL;
104 }
105 state->size = size;
106
107 SCVAL(state->vwv + 0, 0, 0xFF);
108 SCVAL(state->vwv + 0, 1, 0);
109 SSVAL(state->vwv + 1, 0, 0);
110 SSVAL(state->vwv + 2, 0, fnum);
111 SIVAL(state->vwv + 3, 0, offset);
112 SSVAL(state->vwv + 5, 0, size);
113 SSVAL(state->vwv + 6, 0, size);
114 SSVAL(state->vwv + 7, 0, (size >> 16));
115 SSVAL(state->vwv + 8, 0, 0);
116 SSVAL(state->vwv + 9, 0, 0);
117
118 if ((uint64_t)offset >> 32) {
119 bigoffset = true;
120 SIVAL(state->vwv + 10, 0,
121 (((uint64_t)offset)>>32) & 0xffffffff);
122 wct += 2;
123 }
124
125 subreq = cli_smb_req_create(state, ev, cli, SMBreadX, 0, wct,
126 state->vwv, 0, NULL);
127 if (subreq == NULL) {
128 TALLOC_FREE(req);
129 return NULL;
130 }
131 tevent_req_set_callback(subreq, cli_read_andx_done, req);
132 *psmbreq = subreq;
133 return req;
134 }
135
136 struct tevent_req *cli_read_andx_send(TALLOC_CTX *mem_ctx,
137 struct event_context *ev,
138 struct cli_state *cli, uint16_t fnum,
139 off_t offset, size_t size)
140 {
141 struct tevent_req *req, *subreq;
142
143 req = cli_read_andx_create(mem_ctx, ev, cli, fnum, offset, size,
144 &subreq);
145 if ((req == NULL) || !cli_smb_req_send(subreq)) {
146 TALLOC_FREE(req);
147 return NULL;
148 }
149 return req;
150 }
151
152 static void cli_read_andx_done(struct tevent_req *subreq)
153 {
154 struct tevent_req *req = tevent_req_callback_data(
155 subreq, struct tevent_req);
156 struct cli_read_andx_state *state = tevent_req_data(
157 req, struct cli_read_andx_state);
158 uint8_t *inbuf;
159 uint8_t wct;
160 uint16_t *vwv;
161 uint32_t num_bytes;
162 uint8_t *bytes;
163
164 state->status = cli_smb_recv(subreq, 12, &wct, &vwv, &num_bytes,
165 &bytes);
166 if (NT_STATUS_IS_ERR(state->status)) {
167 tevent_req_nterror(req, state->status);
168 return;
169 }
170
171 /* size is the number of bytes the server returned.
172 * Might be zero. */
173 state->received = SVAL(vwv + 5, 0);
174 state->received |= (((unsigned int)SVAL(vwv + 7, 0)) << 16);
175
176 if (state->received > state->size) {
177 DEBUG(5,("server returned more than we wanted!\n"));
178 tevent_req_nterror(req, NT_STATUS_UNEXPECTED_IO_ERROR);
179 return;
180 }
181
182 /*
183 * bcc field must be valid for small reads, for large reads the 16-bit
184 * bcc field can't be correct.
185 */
186
187 if ((state->received < 0xffff) && (state->received > num_bytes)) {
188 DEBUG(5, ("server announced more bytes than sent\n"));
189 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
190 return;
191 }
192
193 inbuf = cli_smb_inbuf(subreq);
194 state->buf = (uint8_t *)smb_base(inbuf) + SVAL(vwv+6, 0);
195
196 if (trans_oob(smb_len(inbuf), SVAL(vwv+6, 0), state->received)
197 || (state->buf < bytes)) {
198 DEBUG(5, ("server returned invalid read&x data offset\n"));
199 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
200 return;
201 }
202 tevent_req_done(req);
203 }
204
205 /*
206 * Pull the data out of a finished async read_and_x request. rcvbuf is
207 * talloced from the request, so better make sure that you copy it away before
208 * you talloc_free(req). "rcvbuf" is NOT a talloc_ctx of its own, so do not
209 * talloc_move it!
210 */
211
212 NTSTATUS cli_read_andx_recv(struct tevent_req *req, ssize_t *received,
213 uint8_t **rcvbuf)
214 {
215 struct cli_read_andx_state *state = tevent_req_data(
216 req, struct cli_read_andx_state);
217 NTSTATUS status;
218
219 if (tevent_req_is_nterror(req, &status)) {
220 return status;
221 }
222 *received = state->received;
223 *rcvbuf = state->buf;
224 return NT_STATUS_OK;
225 }
226
227 struct cli_pull_subreq {
228 struct tevent_req *req;
229 ssize_t received;
230 uint8_t *buf;
231 };
232
233 /*
234 * Parallel read support.
235 *
236 * cli_pull sends as many read&x requests as the server would allow via
237 * max_mux at a time. When replies flow back in, the data is written into
238 * the callback function "sink" in the right order.
239 */
240
241 struct cli_pull_state {
242 struct tevent_req *req;
243
244 struct event_context *ev;
245 struct cli_state *cli;
246 uint16_t fnum;
247 off_t start_offset;
248 SMB_OFF_T size;
249
250 NTSTATUS (*sink)(char *buf, size_t n, void *priv);
251 void *priv;
252
253 size_t chunk_size;
254
255 /*
256 * Outstanding requests
257 */
258 int num_reqs;
259 struct cli_pull_subreq *reqs;
260
261 /*
262 * For how many bytes did we send requests already?
263 */
264 SMB_OFF_T requested;
265
266 /*
267 * Next request index to push into "sink". This walks around the "req"
268 * array, taking care that the requests are pushed to "sink" in the
269 * right order. If necessary (i.e. replies don't come in in the right
270 * order), replies are held back in "reqs".
271 */
272 int top_req;
273
274 /*
275 * How many bytes did we push into "sink"?
276 */
277
278 SMB_OFF_T pushed;
279 };
280
281 static char *cli_pull_print(struct tevent_req *req, TALLOC_CTX *mem_ctx)
282 {
283 struct cli_pull_state *state = tevent_req_data(
284 req, struct cli_pull_state);
285 char *result;
286
287 result = tevent_req_print(mem_ctx, req);
288 if (result == NULL) {
289 return NULL;
290 }
291
292 return talloc_asprintf_append_buffer(
293 result, "num_reqs=%d, top_req=%d",
294 state->num_reqs, state->top_req);
295 }
296
297 static void cli_pull_read_done(struct tevent_req *read_req);
298
299 /*
300 * Prepare an async pull request
301 */
302
303 struct tevent_req *cli_pull_send(TALLOC_CTX *mem_ctx,
304 struct event_context *ev,
305 struct cli_state *cli,
306 uint16_t fnum, off_t start_offset,
307 SMB_OFF_T size, size_t window_size,
308 NTSTATUS (*sink)(char *buf, size_t n,
309 void *priv),
310 void *priv)
311 {
312 struct tevent_req *req;
313 struct cli_pull_state *state;
314 int i;
315
316 req = tevent_req_create(mem_ctx, &state, struct cli_pull_state);
317 if (req == NULL) {
318 return NULL;
319 }
320 tevent_req_set_print_fn(req, cli_pull_print);
321 state->req = req;
322
323 state->cli = cli;
324 state->ev = ev;
325 state->fnum = fnum;
326 state->start_offset = start_offset;
327 state->size = size;
328 state->sink = sink;
329 state->priv = priv;
330
331 state->pushed = 0;
332 state->top_req = 0;
333
334 if (size == 0) {
335 tevent_req_done(req);
336 return tevent_req_post(req, ev);
337 }
338
339 state->chunk_size = cli_read_max_bufsize(cli);
340
341 state->num_reqs = MAX(window_size/state->chunk_size, 1);
342 state->num_reqs = MIN(state->num_reqs, cli->max_mux);
343
344 state->reqs = TALLOC_ZERO_ARRAY(state, struct cli_pull_subreq,
345 state->num_reqs);
346 if (state->reqs == NULL) {
347 goto failed;
348 }
349
350 state->requested = 0;
351
352 for (i=0; i<state->num_reqs; i++) {
353 struct cli_pull_subreq *subreq = &state->reqs[i];
354 SMB_OFF_T size_left;
355 size_t request_thistime;
356
357 if (state->requested >= size) {
358 state->num_reqs = i;
359 break;
360 }
361
362 size_left = size - state->requested;
363 request_thistime = MIN(size_left, state->chunk_size);
364
365 subreq->req = cli_read_andx_send(
366 state->reqs, ev, cli, fnum,
367 state->start_offset + state->requested,
368 request_thistime);
369
370 if (subreq->req == NULL) {
371 goto failed;
372 }
373 tevent_req_set_callback(subreq->req, cli_pull_read_done, req);
374 state->requested += request_thistime;
375 }
376 return req;
377
378 failed:
379 TALLOC_FREE(req);
380 return NULL;
381 }
382
383 /*
384 * Handle incoming read replies, push the data into sink and send out new
385 * requests if necessary.
386 */
387
388 static void cli_pull_read_done(struct tevent_req *subreq)
389 {
390 struct tevent_req *req = tevent_req_callback_data(
391 subreq, struct tevent_req);
392 struct cli_pull_state *state = tevent_req_data(
393 req, struct cli_pull_state);
394 struct cli_pull_subreq *pull_subreq = NULL;
395 NTSTATUS status;
396 int i;
397
398 for (i = 0; i < state->num_reqs; i++) {
399 pull_subreq = &state->reqs[i];
400 if (subreq == pull_subreq->req) {
401 break;
402 }
403 }
404 if (i == state->num_reqs) {
405 /* Huh -- received something we did not send?? */
406 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
407 return;
408 }
409
410 status = cli_read_andx_recv(subreq, &pull_subreq->received,
411 &pull_subreq->buf);
412 if (!NT_STATUS_IS_OK(status)) {
413 tevent_req_nterror(state->req, status);
414 return;
415 }
416
417 /*
418 * This loop is the one to take care of out-of-order replies. All
419 * pending requests are in state->reqs, state->reqs[top_req] is the
420 * one that is to be pushed next. If however a request later than
421 * top_req is replied to, then we can't push yet. If top_req is
422 * replied to at a later point then, we need to push all the finished
423 * requests.
424 */
425
426 while (state->reqs[state->top_req].req != NULL) {
427 struct cli_pull_subreq *top_subreq;
428
429 DEBUG(11, ("cli_pull_read_done: top_req = %d\n",
430 state->top_req));
431
432 top_subreq = &state->reqs[state->top_req];
433
434 if (tevent_req_is_in_progress(top_subreq->req)) {
435 DEBUG(11, ("cli_pull_read_done: top request not yet "
436 "done\n"));
437 return;
438 }
439
440 DEBUG(10, ("cli_pull_read_done: Pushing %d bytes, %d already "
441 "pushed\n", (int)top_subreq->received,
442 (int)state->pushed));
443
444 status = state->sink((char *)top_subreq->buf,
445 top_subreq->received, state->priv);
446 if (!NT_STATUS_IS_OK(status)) {
447 tevent_req_nterror(state->req, status);
448 return;
449 }
450 state->pushed += top_subreq->received;
451
452 TALLOC_FREE(state->reqs[state->top_req].req);
453
454 if (state->requested < state->size) {
455 struct tevent_req *new_req;
456 SMB_OFF_T size_left;
457 size_t request_thistime;
458
459 size_left = state->size - state->requested;
460 request_thistime = MIN(size_left, state->chunk_size);
461
462 DEBUG(10, ("cli_pull_read_done: Requesting %d bytes "
463 "at %d, position %d\n",
464 (int)request_thistime,
465 (int)(state->start_offset
466 + state->requested),
467 state->top_req));
468
469 new_req = cli_read_andx_send(
470 state->reqs, state->ev, state->cli,
471 state->fnum,
472 state->start_offset + state->requested,
473 request_thistime);
474
475 if (tevent_req_nomem(new_req, state->req)) {
476 return;
477 }
478 tevent_req_set_callback(new_req, cli_pull_read_done,
479 req);
480
481 state->reqs[state->top_req].req = new_req;
482 state->requested += request_thistime;
483 }
484
485 state->top_req = (state->top_req+1) % state->num_reqs;
486 }
487
488 tevent_req_done(req);
489 }
490
491 NTSTATUS cli_pull_recv(struct tevent_req *req, SMB_OFF_T *received)
492 {
493 struct cli_pull_state *state = tevent_req_data(
494 req, struct cli_pull_state);
495 NTSTATUS status;
496
497 if (tevent_req_is_nterror(req, &status)) {
498 return status;
499 }
500 *received = state->pushed;
501 return NT_STATUS_OK;
502 }
503
504 NTSTATUS cli_pull(struct cli_state *cli, uint16_t fnum,
505 off_t start_offset, SMB_OFF_T size, size_t window_size,
506 NTSTATUS (*sink)(char *buf, size_t n, void *priv),
507 void *priv, SMB_OFF_T *received)
508 {
509 TALLOC_CTX *frame = talloc_stackframe();
510 struct event_context *ev;
511 struct tevent_req *req;
512 NTSTATUS status = NT_STATUS_OK;
513
514 if (cli_has_async_calls(cli)) {
515 /*
516 * Can't use sync call while an async call is in flight
517 */
518 status = NT_STATUS_INVALID_PARAMETER;
519 goto fail;
520 }
521
522 ev = event_context_init(frame);
523 if (ev == NULL) {
524 status = NT_STATUS_NO_MEMORY;
525 goto fail;
526 }
527
528 req = cli_pull_send(frame, ev, cli, fnum, start_offset, size,
529 window_size, sink, priv);
530 if (req == NULL) {
531 status = NT_STATUS_NO_MEMORY;
532 goto fail;
533 }
534
535 if (!tevent_req_poll(req, ev)) {
536 status = map_nt_error_from_unix(errno);
537 goto fail;
538 }
539
540 status = cli_pull_recv(req, received);
541 fail:
542 TALLOC_FREE(frame);
543 if (!NT_STATUS_IS_OK(status)) {
544 cli_set_error(cli, status);
545 }
546 return status;
547 }
548
549 static NTSTATUS cli_read_sink(char *buf, size_t n, void *priv)
550 {
551 char **pbuf = (char **)priv;
552 memcpy(*pbuf, buf, n);
553 *pbuf += n;
554 return NT_STATUS_OK;
555 }
556
557 ssize_t cli_read(struct cli_state *cli, uint16_t fnum, char *buf,
558 off_t offset, size_t size)
559 {
560 NTSTATUS status;
561 SMB_OFF_T ret;
562
563 status = cli_pull(cli, fnum, offset, size, size,
564 cli_read_sink, &buf, &ret);
565 if (!NT_STATUS_IS_OK(status)) {
566 cli_set_error(cli, status);
567 return -1;
568 }
569 return ret;
570 }
571
572 /****************************************************************************
573 Issue a single SMBwrite and don't wait for a reply.
574 ****************************************************************************/
575
576 static bool cli_issue_write(struct cli_state *cli,
577 uint16_t fnum,
578 off_t offset,
579 uint16 mode,
580 const char *buf,
581 size_t size,
582 int i)
583 {
584 char *p;
585 bool large_writex = false;
586 /* We can only do direct writes if not signing and not encrypting. */
587 bool direct_writes = !client_is_signing_on(cli) && !cli_encryption_on(cli);
588
589 if (!direct_writes && size + 1 > cli->bufsize) {
590 cli->outbuf = (char *)SMB_REALLOC(cli->outbuf, size + 1024);
591 if (!cli->outbuf) {
592 return False;
593 }
594 cli->inbuf = (char *)SMB_REALLOC(cli->inbuf, size + 1024);
595 if (cli->inbuf == NULL) {
596 SAFE_FREE(cli->outbuf);
597 return False;
598 }
599 cli->bufsize = size + 1024;
600 }
601
602 memset(cli->outbuf,'\0',smb_size);
603 memset(cli->inbuf,'\0',smb_size);
604
605 if (cli->capabilities & CAP_LARGE_FILES) {
606 large_writex = True;
607 }
608
609 if (large_writex) {
610 cli_set_message(cli->outbuf,14,0,True);
611 } else {
612 cli_set_message(cli->outbuf,12,0,True);
613 }
614
615 SCVAL(cli->outbuf,smb_com,SMBwriteX);
616 SSVAL(cli->outbuf,smb_tid,cli->cnum);
617 cli_setup_packet(cli);
618
619 SCVAL(cli->outbuf,smb_vwv0,0xFF);
620 SSVAL(cli->outbuf,smb_vwv2,fnum);
621
622 SIVAL(cli->outbuf,smb_vwv3,offset);
623 SIVAL(cli->outbuf,smb_vwv5,0);
624 SSVAL(cli->outbuf,smb_vwv7,mode);
625
626 SSVAL(cli->outbuf,smb_vwv8,(mode & 0x0008) ? size : 0);
627 /*
628 * According to CIFS-TR-1p00, this following field should only
629 * be set if CAP_LARGE_WRITEX is set. We should check this
630 * locally. However, this check might already have been
631 * done by our callers.
632 */
633 SSVAL(cli->outbuf,smb_vwv9,(size>>16));
634 SSVAL(cli->outbuf,smb_vwv10,size);
635 /* +1 is pad byte. */
636 SSVAL(cli->outbuf,smb_vwv11,
637 smb_buf(cli->outbuf) - smb_base(cli->outbuf) + 1);
638
639 if (large_writex) {
640 SIVAL(cli->outbuf,smb_vwv12,(((uint64_t)offset)>>32) & 0xffffffff);
641 }
642
643 p = smb_base(cli->outbuf) + SVAL(cli->outbuf,smb_vwv11) -1;
644 *p++ = '\0'; /* pad byte. */
645 if (!direct_writes) {
646 memcpy(p, buf, size);
647 }
648 if (size > 0x1FFFF) {
649 /* This is a POSIX 14 word large write. */
650 set_message_bcc(cli->outbuf, 0); /* Set bcc to zero. */
651 _smb_setlen_large(cli->outbuf,smb_size + 28 + 1 /* pad */ + size - 4);
652 } else {
653 cli_setup_bcc(cli, p+size);
654 }
655
656 SSVAL(cli->outbuf,smb_mid,cli->mid + i);
657
658 show_msg(cli->outbuf);
659 if (direct_writes) {
660 /* For direct writes we now need to write the data
661 * directly out of buf. */
662 return cli_send_smb_direct_writeX(cli, buf, size);
663 } else {
664 return cli_send_smb(cli);
665 }
666 }
667
668 /****************************************************************************
669 write to a file
670 write_mode: 0x0001 disallow write cacheing
671 0x0002 return bytes remaining
672 0x0004 use raw named pipe protocol
673 0x0008 start of message mode named pipe protocol
674 ****************************************************************************/
675
676 ssize_t cli_write(struct cli_state *cli,
677 uint16_t fnum, uint16 write_mode,
678 const char *buf, off_t offset, size_t size)
679 {
680 ssize_t bwritten = 0;
681 unsigned int issued = 0;
682 unsigned int received = 0;
683 int mpx = 1;
684 size_t writesize;
685 int blocks;
686
687 if(cli->max_mux > 1) {
688 mpx = cli->max_mux-1;
689 } else {
690 mpx = 1;
691 }
692
693 writesize = cli_write_max_bufsize(cli, write_mode);
694
695 blocks = (size + (writesize-1)) / writesize;
696
697 while (received < blocks) {
698
699 while ((issued - received < mpx) && (issued < blocks)) {
700 ssize_t bsent = issued * writesize;
701 ssize_t size1 = MIN(writesize, size - bsent);
702
703 if (!cli_issue_write(cli, fnum, offset + bsent,
704 write_mode,
705 buf + bsent,
706 size1, issued))
707 return -1;
708 issued++;
709 }
710
711 if (!cli_receive_smb(cli)) {
712 return bwritten;
713 }
714
715 received++;
716
717 if (cli_is_error(cli))
718 break;
719
720 bwritten += SVAL(cli->inbuf, smb_vwv2);
721 if (writesize > 0xFFFF) {
722 bwritten += (((int)(SVAL(cli->inbuf, smb_vwv4)))<<16);
723 }
724 }
725
726 while (received < issued && cli_receive_smb(cli)) {
727 received++;
728 }
729
730 return bwritten;
731 }
732
733 /****************************************************************************
734 write to a file using a SMBwrite and not bypassing 0 byte writes
735 ****************************************************************************/
736
737 ssize_t cli_smbwrite(struct cli_state *cli,
738 uint16_t fnum, char *buf, off_t offset, size_t size1)
739 {
740 char *p;
741 ssize_t total = 0;
742
743 do {
744 size_t size = MIN(size1, cli->max_xmit - 48);
745
746 memset(cli->outbuf,'\0',smb_size);
747 memset(cli->inbuf,'\0',smb_size);
748
749 cli_set_message(cli->outbuf,5, 0,True);
750
751 SCVAL(cli->outbuf,smb_com,SMBwrite);
752 SSVAL(cli->outbuf,smb_tid,cli->cnum);
753 cli_setup_packet(cli);
754
755 SSVAL(cli->outbuf,smb_vwv0,fnum);
756 SSVAL(cli->outbuf,smb_vwv1,size);
757 SIVAL(cli->outbuf,smb_vwv2,offset);
758 SSVAL(cli->outbuf,smb_vwv4,0);
759
760 p = smb_buf(cli->outbuf);
761 *p++ = 1;
762 SSVAL(p, 0, size); p += 2;
763 memcpy(p, buf + total, size); p += size;
764
765 cli_setup_bcc(cli, p);
766
767 if (!cli_send_smb(cli))
768 return -1;
769
770 if (!cli_receive_smb(cli))
771 return -1;
772
773 if (cli_is_error(cli))
774 return -1;
775
776 size = SVAL(cli->inbuf,smb_vwv0);
777 if (size == 0)
778 break;
779
780 size1 -= size;
781 total += size;
782 offset += size;
783
784 } while (size1);
785
786 return total;
787 }
788
789 /*
790 * Send a write&x request
791 */
792
793 struct cli_write_andx_state {
794 size_t size;
795 uint16_t vwv[14];
796 size_t written;
797 uint8_t pad;
798 struct iovec iov[2];
799 };
800
801 static void cli_write_andx_done(struct tevent_req *subreq);
802
803 struct tevent_req *cli_write_andx_create(TALLOC_CTX *mem_ctx,
804 struct event_context *ev,
805 struct cli_state *cli, uint16_t fnum,
806 uint16_t mode, const uint8_t *buf,
807 off_t offset, size_t size,
808 struct tevent_req **reqs_before,
809 int num_reqs_before,
810 struct tevent_req **psmbreq)
811 {
812 struct tevent_req *req, *subreq;
813 struct cli_write_andx_state *state;
814 bool bigoffset = ((cli->capabilities & CAP_LARGE_FILES) != 0);
815 uint8_t wct = bigoffset ? 14 : 12;
816 size_t max_write = cli_write_max_bufsize(cli, mode);
817 uint16_t *vwv;
818
819 req = tevent_req_create(mem_ctx, &state, struct cli_write_andx_state);
820 if (req == NULL) {
821 return NULL;
822 }
823
824 size = MIN(size, max_write);
825
826 vwv = state->vwv;
827
828 SCVAL(vwv+0, 0, 0xFF);
829 SCVAL(vwv+0, 1, 0);
830 SSVAL(vwv+1, 0, 0);
831 SSVAL(vwv+2, 0, fnum);
832 SIVAL(vwv+3, 0, offset);
833 SIVAL(vwv+5, 0, 0);
834 SSVAL(vwv+7, 0, mode);
835 SSVAL(vwv+8, 0, 0);
836 SSVAL(vwv+9, 0, (size>>16));
837 SSVAL(vwv+10, 0, size);
838
839 SSVAL(vwv+11, 0,
840 cli_smb_wct_ofs(reqs_before, num_reqs_before)
841 + 1 /* the wct field */
842 + wct * 2 /* vwv */
843 + 2 /* num_bytes field */
844 + 1 /* pad */);
845
846 if (bigoffset) {
847 SIVAL(vwv+12, 0, (((uint64_t)offset)>>32) & 0xffffffff);
848 }
849
850 state->pad = 0;
851 state->iov[0].iov_base = &state->pad;
852 state->iov[0].iov_len = 1;
853 state->iov[1].iov_base = CONST_DISCARD(uint8_t *, buf);
854 state->iov[1].iov_len = size;
855
856 subreq = cli_smb_req_create(state, ev, cli, SMBwriteX, 0, wct, vwv,
857 2, state->iov);
858 if (tevent_req_nomem(subreq, req)) {
859 return tevent_req_post(req, ev);
860 }
861 tevent_req_set_callback(subreq, cli_write_andx_done, req);
862 *psmbreq = subreq;
863 return req;
864 }
865
866 struct tevent_req *cli_write_andx_send(TALLOC_CTX *mem_ctx,
867 struct event_context *ev,
868 struct cli_state *cli, uint16_t fnum,
869 uint16_t mode, const uint8_t *buf,
870 off_t offset, size_t size)
871 {
872 struct tevent_req *req, *subreq;
873
874 req = cli_write_andx_create(mem_ctx, ev, cli, fnum, mode, buf, offset,
875 size, NULL, 0, &subreq);
876 if ((req == NULL) || !cli_smb_req_send(subreq)) {
877 TALLOC_FREE(req);
878 return NULL;
879 }
880 return req;
881 }
882
883 static void cli_write_andx_done(struct tevent_req *subreq)
884 {
885 struct tevent_req *req = tevent_req_callback_data(
886 subreq, struct tevent_req);
887 struct cli_write_andx_state *state = tevent_req_data(
888 req, struct cli_write_andx_state);
889 uint8_t wct;
890 uint16_t *vwv;
891 NTSTATUS status;
892
893 status = cli_smb_recv(subreq, 6, &wct, &vwv, NULL, NULL);
894 if (NT_STATUS_IS_ERR(status)) {
895 TALLOC_FREE(subreq);
896 tevent_req_nterror(req, status);
897 return;
898 }
899 state->written = SVAL(vwv+2, 0);
900 state->written |= SVAL(vwv+4, 0)<<16;
901 tevent_req_done(req);
902 }
903
904 NTSTATUS cli_write_andx_recv(struct tevent_req *req, size_t *pwritten)
905 {
906 struct cli_write_andx_state *state = tevent_req_data(
907 req, struct cli_write_andx_state);
908 NTSTATUS status;
909
910 if (tevent_req_is_nterror(req, &status)) {
911 return status;
912 }
913 *pwritten = state->written;
914 return NT_STATUS_OK;
915 }
916
917 struct cli_writeall_state {
918 struct event_context *ev;
919 struct cli_state *cli;
920 uint16_t fnum;
921 uint16_t mode;
922 const uint8_t *buf;
923 off_t offset;
924 size_t size;
925 size_t written;
926 };
927
928 static void cli_writeall_written(struct tevent_req *req);
929
930 static struct tevent_req *cli_writeall_send(TALLOC_CTX *mem_ctx,
931 struct event_context *ev,
932 struct cli_state *cli,
933 uint16_t fnum,
934 uint16_t mode,
935 const uint8_t *buf,
936 off_t offset, size_t size)
937 {
938 struct tevent_req *req, *subreq;
939 struct cli_writeall_state *state;
940
941 req = tevent_req_create(mem_ctx, &state, struct cli_writeall_state);
942 if (req == NULL) {
943 return NULL;
944 }
945 state->ev = ev;
946 state->cli = cli;
947 state->fnum = fnum;
948 state->mode = mode;
949 state->buf = buf;
950 state->offset = offset;
951 state->size = size;
952 state->written = 0;
953
954 subreq = cli_write_andx_send(state, state->ev, state->cli, state->fnum,
955 state->mode, state->buf, state->offset,
956 state->size);
957 if (tevent_req_nomem(subreq, req)) {
958 return tevent_req_post(req, ev);
959 }
960 tevent_req_set_callback(subreq, cli_writeall_written, req);
961 return req;
962 }
963
964 static void cli_writeall_written(struct tevent_req *subreq)
965 {
966 struct tevent_req *req = tevent_req_callback_data(
967 subreq, struct tevent_req);
968 struct cli_writeall_state *state = tevent_req_data(
969 req, struct cli_writeall_state);
970 NTSTATUS status;
971 size_t written, to_write;
972
973 status = cli_write_andx_recv(subreq, &written);
974 TALLOC_FREE(subreq);
975 if (!NT_STATUS_IS_OK(status)) {
976 tevent_req_nterror(req, status);
977 return;
978 }
979
980 state->written += written;
981
982 if (state->written > state->size) {
983 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
984 return;
985 }
986
987 to_write = state->size - state->written;
988
989 if (to_write == 0) {
990 tevent_req_done(req);
991 return;
992 }
993
994 subreq = cli_write_andx_send(state, state->ev, state->cli, state->fnum,
995 state->mode,
996 state->buf + state->written,
997 state->offset + state->written, to_write);
998 if (tevent_req_nomem(subreq, req)) {
999 return;
1000 }
1001 tevent_req_set_callback(subreq, cli_writeall_written, req);
1002 }
1003
1004 static NTSTATUS cli_writeall_recv(struct tevent_req *req)
1005 {
1006 return tevent_req_simple_recv_ntstatus(req);
1007 }
1008
1009 struct cli_push_write_state {
1010 struct tevent_req *req;/* This is the main request! Not the subreq */
1011 uint32_t idx;
1012 off_t ofs;
1013 uint8_t *buf;
1014 size_t size;
1015 };
1016
1017 struct cli_push_state {
1018 struct event_context *ev;
1019 struct cli_state *cli;
1020 uint16_t fnum;
1021 uint16_t mode;
1022 off_t start_offset;
1023 size_t window_size;
1024
1025 size_t (*source)(uint8_t *buf, size_t n, void *priv);
1026 void *priv;
1027
1028 bool eof;
1029
1030 size_t chunk_size;
1031 off_t next_offset;
1032
1033 /*
1034 * Outstanding requests
1035 */
1036 uint32_t pending;
1037 uint32_t num_reqs;
1038 struct cli_push_write_state **reqs;
1039 };
1040
1041 static void cli_push_written(struct tevent_req *req);
1042
1043 static bool cli_push_write_setup(struct tevent_req *req,
1044 struct cli_push_state *state,
1045 uint32_t idx)
1046 {
1047 struct cli_push_write_state *substate;
1048 struct tevent_req *subreq;
1049
1050 substate = talloc(state->reqs, struct cli_push_write_state);
1051 if (!substate) {
1052 return false;
1053 }
1054 substate->req = req;
1055 substate->idx = idx;
1056 substate->ofs = state->next_offset;
1057 substate->buf = talloc_array(substate, uint8_t, state->chunk_size);
1058 if (!substate->buf) {
1059 talloc_free(substate);
1060 return false;
1061 }
1062 substate->size = state->source(substate->buf,
1063 state->chunk_size,
1064 state->priv);
1065 if (substate->size == 0) {
1066 state->eof = true;
1067 /* nothing to send */
1068 talloc_free(substate);
1069 return true;
1070 }
1071
1072 subreq = cli_writeall_send(substate,
1073 state->ev, state->cli,
1074 state->fnum, state->mode,
1075 substate->buf,
1076 substate->ofs,
1077 substate->size);
1078 if (!subreq) {
1079 talloc_free(substate);
1080 return false;
1081 }
1082 tevent_req_set_callback(subreq, cli_push_written, substate);
1083
1084 state->reqs[idx] = substate;
1085 state->pending += 1;
1086 state->next_offset += substate->size;
1087
1088 return true;
1089 }
1090
1091 struct tevent_req *cli_push_send(TALLOC_CTX *mem_ctx, struct event_context *ev,
1092 struct cli_state *cli,
1093 uint16_t fnum, uint16_t mode,
1094 off_t start_offset, size_t window_size,
1095 size_t (*source)(uint8_t *buf, size_t n,
1096 void *priv),
1097 void *priv)
1098 {
1099 struct tevent_req *req;
1100 struct cli_push_state *state;
1101 uint32_t i;
1102
1103 req = tevent_req_create(mem_ctx, &state, struct cli_push_state);
1104 if (req == NULL) {
1105 return NULL;
1106 }
1107 state->cli = cli;
1108 state->ev = ev;
1109 state->fnum = fnum;
1110 state->start_offset = start_offset;
1111 state->mode = mode;
1112 state->source = source;
1113 state->priv = priv;
1114 state->eof = false;
1115 state->pending = 0;
1116 state->next_offset = start_offset;
1117
1118 state->chunk_size = cli_write_max_bufsize(cli, mode);
1119
1120 if (window_size == 0) {
1121 window_size = cli->max_mux * state->chunk_size;
1122 }
1123 state->num_reqs = window_size/state->chunk_size;
1124 if ((window_size % state->chunk_size) > 0) {
1125 state->num_reqs += 1;
1126 }
1127 state->num_reqs = MIN(state->num_reqs, cli->max_mux);
1128 state->num_reqs = MAX(state->num_reqs, 1);
1129
1130 state->reqs = TALLOC_ZERO_ARRAY(state, struct cli_push_write_state *,
1131 state->num_reqs);
1132 if (state->reqs == NULL) {
1133 goto failed;
1134 }
1135
1136 for (i=0; i<state->num_reqs; i++) {
1137 if (!cli_push_write_setup(req, state, i)) {
1138 goto failed;
1139 }
1140
1141 if (state->eof) {
1142 break;
1143 }
1144 }
1145
1146 if (state->pending == 0) {
1147 tevent_req_done(req);
1148 return tevent_req_post(req, ev);
1149 }
1150
1151 return req;
1152
1153 failed:
1154 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1155 return tevent_req_post(req, ev);
1156 }
1157
1158 static void cli_push_written(struct tevent_req *subreq)
1159 {
1160 struct cli_push_write_state *substate = tevent_req_callback_data(
1161 subreq, struct cli_push_write_state);
1162 struct tevent_req *req = substate->req;
1163 struct cli_push_state *state = tevent_req_data(
1164 req, struct cli_push_state);
1165 NTSTATUS status;
1166 uint32_t idx = substate->idx;
1167
1168 state->reqs[idx] = NULL;
1169 state->pending -= 1;
1170
1171 status = cli_writeall_recv(subreq);
1172 TALLOC_FREE(subreq);
1173 TALLOC_FREE(substate);
1174 if (!NT_STATUS_IS_OK(status)) {
1175 tevent_req_nterror(req, status);
1176 return;
1177 }
1178
1179 if (!state->eof) {
1180 if (!cli_push_write_setup(req, state, idx)) {
1181 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1182 return;
1183 }
1184 }
1185
1186 if (state->pending == 0) {
1187 tevent_req_done(req);
1188 return;
1189 }
1190 }
1191
1192 NTSTATUS cli_push_recv(struct tevent_req *req)
1193 {
1194 return tevent_req_simple_recv_ntstatus(req);
1195 }
1196
1197 NTSTATUS cli_push(struct cli_state *cli, uint16_t fnum, uint16_t mode,
1198 off_t start_offset, size_t window_size,
1199 size_t (*source)(uint8_t *buf, size_t n, void *priv),
1200 void *priv)
1201 {
1202 TALLOC_CTX *frame = talloc_stackframe();
1203 struct event_context *ev;
1204 struct tevent_req *req;
1205 NTSTATUS status = NT_STATUS_OK;
1206
1207 if (cli_has_async_calls(cli)) {
1208 /*
1209 * Can't use sync call while an async call is in flight
1210 */
1211 status = NT_STATUS_INVALID_PARAMETER;
1212 goto fail;
1213 }
1214
1215 ev = event_context_init(frame);
1216 if (ev == NULL) {
1217 status = NT_STATUS_NO_MEMORY;
1218 goto fail;
1219 }
1220
1221 req = cli_push_send(frame, ev, cli, fnum, mode, start_offset,
1222 window_size, source, priv);
1223 if (req == NULL) {
1224 status = NT_STATUS_NO_MEMORY;
1225 goto fail;
1226 }
1227
1228 if (!tevent_req_poll(req, ev)) {
1229 status = map_nt_error_from_unix(errno);
1230 goto fail;
1231 }
1232
1233 status = cli_push_recv(req);
1234 fail:
1235 TALLOC_FREE(frame);
1236 if (!NT_STATUS_IS_OK(status)) {
1237 cli_set_error(cli, status);
1238 }
1239 return status;
1240 }
reg import