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s3:libsmb/clitrans: use uint32_t for param and data variables
[Samba/gebeck_regimport.git] / source3 / libsmb / clitrans.c
blob801794856a42fa2b2037f929f2a127b9c2f683ed
1 /*
2 Unix SMB/CIFS implementation.
3 client transaction calls
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
25 struct trans_recvblob {
26 uint8_t *data;
27 uint32_t max, total, received;
28 };
29
30 struct cli_trans_state {
31 struct cli_state *cli;
32 struct event_context *ev;
33 uint8_t cmd;
34 uint16_t mid;
35 uint32_t seqnum;
36 const char *pipe_name;
37 uint8_t *pipe_name_conv;
38 size_t pipe_name_conv_len;
39 uint16_t fid;
40 uint16_t function;
41 int flags;
42 uint16_t *setup;
43 uint8_t num_setup, max_setup;
44 uint8_t *param;
45 uint32_t num_param, param_sent;
46 uint8_t *data;
47 uint32_t num_data, data_sent;
48
49 uint8_t num_rsetup;
50 uint16_t *rsetup;
51 struct trans_recvblob rparam;
52 struct trans_recvblob rdata;
53 uint16_t recv_flags2;
54
55 struct iovec iov[4];
56 uint8_t pad[4];
57 uint16_t vwv[32];
58 };
59
60 static NTSTATUS cli_pull_trans(uint8_t *inbuf,
61 uint8_t wct, uint16_t *vwv,
62 uint16_t num_bytes, uint8_t *bytes,
63 uint8_t smb_cmd, bool expect_first_reply,
64 uint8_t *pnum_setup, uint16_t **psetup,
65 uint32_t *ptotal_param, uint32_t *pnum_param,
66 uint32_t *pparam_disp, uint8_t **pparam,
67 uint32_t *ptotal_data, uint32_t *pnum_data,
68 uint32_t *pdata_disp, uint8_t **pdata)
69 {
70 uint32_t param_ofs, data_ofs;
71
72 if (expect_first_reply) {
73 if ((wct != 0) || (num_bytes != 0)) {
74 return NT_STATUS_INVALID_NETWORK_RESPONSE;
75 }
76 return NT_STATUS_OK;
77 }
78
79 switch (smb_cmd) {
80 case SMBtrans:
81 case SMBtrans2:
82 if (wct < 10) {
83 return NT_STATUS_INVALID_NETWORK_RESPONSE;
84 }
85 *ptotal_param = SVAL(vwv + 0, 0);
86 *ptotal_data = SVAL(vwv + 1, 0);
87 *pnum_param = SVAL(vwv + 3, 0);
88 param_ofs = SVAL(vwv + 4, 0);
89 *pparam_disp = SVAL(vwv + 5, 0);
90 *pnum_data = SVAL(vwv + 6, 0);
91 data_ofs = SVAL(vwv + 7, 0);
92 *pdata_disp = SVAL(vwv + 8, 0);
93 *pnum_setup = CVAL(vwv + 9, 0);
94 if (wct < 10 + (*pnum_setup)) {
95 return NT_STATUS_INVALID_NETWORK_RESPONSE;
96 }
97 *psetup = vwv + 10;
98
99 break;
100 case SMBnttrans:
101 if (wct < 18) {
102 return NT_STATUS_INVALID_NETWORK_RESPONSE;
103 }
104 *ptotal_param = IVAL(vwv, 3);
105 *ptotal_data = IVAL(vwv, 7);
106 *pnum_param = IVAL(vwv, 11);
107 param_ofs = IVAL(vwv, 15);
108 *pparam_disp = IVAL(vwv, 19);
109 *pnum_data = IVAL(vwv, 23);
110 data_ofs = IVAL(vwv, 27);
111 *pdata_disp = IVAL(vwv, 31);
112 *pnum_setup = CVAL(vwv, 35);
113 *psetup = vwv + 18;
114 break;
115
116 default:
117 return NT_STATUS_INTERNAL_ERROR;
118 }
119
120 /*
121 * Check for buffer overflows. data_ofs needs to be checked against
122 * the incoming buffer length, data_disp against the total
123 * length. Likewise for param_ofs/param_disp.
124 */
125
126 if (trans_oob(smb_len(inbuf), param_ofs, *pnum_param)
127 || trans_oob(*ptotal_param, *pparam_disp, *pnum_param)
128 || trans_oob(smb_len(inbuf), data_ofs, *pnum_data)
129 || trans_oob(*ptotal_data, *pdata_disp, *pnum_data)) {
130 return NT_STATUS_INVALID_NETWORK_RESPONSE;
131 }
132
133 *pparam = (uint8_t *)inbuf + 4 + param_ofs;
134 *pdata = (uint8_t *)inbuf + 4 + data_ofs;
135
136 return NT_STATUS_OK;
137 }
138
139 static NTSTATUS cli_trans_pull_blob(TALLOC_CTX *mem_ctx,
140 struct trans_recvblob *blob,
141 uint32_t total, uint32_t thistime,
142 uint8_t *buf, uint32_t displacement)
143 {
144 if (blob->data == NULL) {
145 if (total > blob->max) {
146 return NT_STATUS_INVALID_NETWORK_RESPONSE;
147 }
148 blob->total = total;
149 blob->data = talloc_array(mem_ctx, uint8_t, total);
150 if (blob->data == NULL) {
151 return NT_STATUS_NO_MEMORY;
152 }
153 }
154
155 if (total > blob->total) {
156 return NT_STATUS_INVALID_NETWORK_RESPONSE;
157 }
158
159 if (thistime) {
160 memcpy(blob->data + displacement, buf, thistime);
161 blob->received += thistime;
162 }
163
164 return NT_STATUS_OK;
165 }
166
167 static void cli_trans_format(struct cli_trans_state *state, uint8_t *pwct,
168 int *piov_count)
169 {
170 uint8_t wct = 0;
171 struct iovec *iov = state->iov;
172 uint8_t *pad = state->pad;
173 uint16_t *vwv = state->vwv;
174 uint32_t param_offset;
175 uint32_t this_param = 0;
176 uint32_t this_data = 0;
177 uint32_t useable_space;
178 uint8_t cmd;
179
180 cmd = state->cmd;
181
182 if ((state->param_sent != 0) || (state->data_sent != 0)) {
183 /* The secondary commands are one after the primary ones */
184 cmd += 1;
185 }
186
187 param_offset = smb_size - 4;
188
189 switch (cmd) {
190 case SMBtrans:
191 pad[0] = 0;
192 iov[0].iov_base = (void *)pad;
193 iov[0].iov_len = 1;
194 iov[1].iov_base = (void *)state->pipe_name_conv;
195 iov[1].iov_len = state->pipe_name_conv_len;
196 wct = 14 + state->num_setup;
197 param_offset += iov[0].iov_len + iov[1].iov_len;
198 iov += 2;
199 break;
200 case SMBtrans2:
201 pad[0] = 0;
202 pad[1] = 'D'; /* Copy this from "old" 3.0 behaviour */
203 pad[2] = ' ';
204 iov[0].iov_base = (void *)pad;
205 iov[0].iov_len = 3;
206 wct = 14 + state->num_setup;
207 param_offset += 3;
208 iov += 1;
209 break;
210 case SMBtranss:
211 wct = 8;
212 break;
213 case SMBtranss2:
214 wct = 9;
215 break;
216 case SMBnttrans:
217 wct = 19 + state->num_setup;
218 break;
219 case SMBnttranss:
220 wct = 18;
221 break;
222 }
223
224 useable_space = state->cli->max_xmit - smb_size - sizeof(uint16_t)*wct;
225
226 if (state->param_sent < state->num_param) {
227 this_param = MIN(state->num_param - state->param_sent,
228 useable_space);
229 iov[0].iov_base = (void *)(state->param + state->param_sent);
230 iov[0].iov_len = this_param;
231 iov += 1;
232 }
233
234 if (state->data_sent < state->num_data) {
235 this_data = MIN(state->num_data - state->data_sent,
236 useable_space - this_param);
237 iov[0].iov_base = (void *)(state->data + state->data_sent);
238 iov[0].iov_len = this_data;
239 iov += 1;
240 }
241
242 param_offset += wct * sizeof(uint16_t);
243
244 DEBUG(10, ("num_setup=%u, max_setup=%u, "
245 "param_total=%u, this_param=%u, max_param=%u, "
246 "data_total=%u, this_data=%u, max_data=%u, "
247 "param_offset=%u, param_disp=%u, data_disp=%u\n",
248 (unsigned)state->num_setup, (unsigned)state->max_setup,
249 (unsigned)state->num_param, (unsigned)this_param,
250 (unsigned)state->rparam.max,
251 (unsigned)state->num_data, (unsigned)this_data,
252 (unsigned)state->rdata.max,
253 (unsigned)param_offset,
254 (unsigned)state->param_sent, (unsigned)state->data_sent));
255
256 switch (cmd) {
257 case SMBtrans:
258 case SMBtrans2:
259 SSVAL(vwv + 0, 0, state->num_param);
260 SSVAL(vwv + 1, 0, state->num_data);
261 SSVAL(vwv + 2, 0, state->rparam.max);
262 SSVAL(vwv + 3, 0, state->rdata.max);
263 SCVAL(vwv + 4, 0, state->max_setup);
264 SCVAL(vwv + 4, 1, 0); /* reserved */
265 SSVAL(vwv + 5, 0, state->flags);
266 SIVAL(vwv + 6, 0, 0); /* timeout */
267 SSVAL(vwv + 8, 0, 0); /* reserved */
268 SSVAL(vwv + 9, 0, this_param);
269 SSVAL(vwv +10, 0, param_offset);
270 SSVAL(vwv +11, 0, this_data);
271 SSVAL(vwv +12, 0, param_offset + this_param);
272 SCVAL(vwv +13, 0, state->num_setup);
273 SCVAL(vwv +13, 1, 0); /* reserved */
274 memcpy(vwv + 14, state->setup,
275 sizeof(uint16_t) * state->num_setup);
276 break;
277 case SMBtranss:
278 case SMBtranss2:
279 SSVAL(vwv + 0, 0, state->num_param);
280 SSVAL(vwv + 1, 0, state->num_data);
281 SSVAL(vwv + 2, 0, this_param);
282 SSVAL(vwv + 3, 0, param_offset);
283 SSVAL(vwv + 4, 0, state->param_sent);
284 SSVAL(vwv + 5, 0, this_data);
285 SSVAL(vwv + 6, 0, param_offset + this_param);
286 SSVAL(vwv + 7, 0, state->data_sent);
287 if (cmd == SMBtranss2) {
288 SSVAL(vwv + 8, 0, state->fid);
289 }
290 break;
291 case SMBnttrans:
292 SCVAL(vwv, 0, state->max_setup);
293 SSVAL(vwv, 1, 0); /* reserved */
294 SIVAL(vwv, 3, state->num_param);
295 SIVAL(vwv, 7, state->num_data);
296 SIVAL(vwv, 11, state->rparam.max);
297 SIVAL(vwv, 15, state->rdata.max);
298 SIVAL(vwv, 19, this_param);
299 SIVAL(vwv, 23, param_offset);
300 SIVAL(vwv, 27, this_data);
301 SIVAL(vwv, 31, param_offset + this_param);
302 SCVAL(vwv, 35, state->num_setup);
303 SSVAL(vwv, 36, state->function);
304 memcpy(vwv + 19, state->setup,
305 sizeof(uint16_t) * state->num_setup);
306 break;
307 case SMBnttranss:
308 SSVAL(vwv, 0, 0); /* reserved */
309 SCVAL(vwv, 2, 0); /* reserved */
310 SIVAL(vwv, 3, state->num_param);
311 SIVAL(vwv, 7, state->num_data);
312 SIVAL(vwv, 11, this_param);
313 SIVAL(vwv, 15, param_offset);
314 SIVAL(vwv, 19, state->param_sent);
315 SIVAL(vwv, 23, this_data);
316 SIVAL(vwv, 27, param_offset + this_param);
317 SIVAL(vwv, 31, state->data_sent);
318 SCVAL(vwv, 35, 0); /* reserved */
319 break;
320 }
321
322 state->param_sent += this_param;
323 state->data_sent += this_data;
324
325 *pwct = wct;
326 *piov_count = iov - state->iov;
327 }
328
329 static void cli_trans_done(struct tevent_req *subreq);
330
331 struct tevent_req *cli_trans_send(
332 TALLOC_CTX *mem_ctx, struct event_context *ev,
333 struct cli_state *cli, uint8_t cmd,
334 const char *pipe_name, uint16_t fid, uint16_t function, int flags,
335 uint16_t *setup, uint8_t num_setup, uint8_t max_setup,
336 uint8_t *param, uint32_t num_param, uint32_t max_param,
337 uint8_t *data, uint32_t num_data, uint32_t max_data)
338 {
339 struct tevent_req *req, *subreq;
340 struct cli_trans_state *state;
341 int iov_count;
342 uint8_t wct;
343 NTSTATUS status;
344
345 req = tevent_req_create(mem_ctx, &state, struct cli_trans_state);
346 if (req == NULL) {
347 return NULL;
348 }
349
350 if ((cmd == SMBtrans) || (cmd == SMBtrans2)) {
351 if ((num_param > 0xffff) || (max_param > 0xffff)
352 || (num_data > 0xffff) || (max_data > 0xffff)) {
353 DEBUG(3, ("Attempt to send invalid trans2 request "
354 "(setup %u, params %u/%u, data %u/%u)\n",
355 (unsigned)num_setup,
356 (unsigned)num_param, (unsigned)max_param,
357 (unsigned)num_data, (unsigned)max_data));
358 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
359 return tevent_req_post(req, ev);
360 }
361 }
362
363 /*
364 * The largest wct will be for nttrans (19+num_setup). Make sure we
365 * don't overflow state->vwv in cli_trans_format.
366 */
367
368 if ((num_setup + 19) > ARRAY_SIZE(state->vwv)) {
369 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
370 return tevent_req_post(req, ev);
371 }
372
373 state->cli = cli;
374 state->ev = ev;
375 state->cmd = cmd;
376 state->flags = flags;
377 state->num_rsetup = 0;
378 state->rsetup = NULL;
379 ZERO_STRUCT(state->rparam);
380 ZERO_STRUCT(state->rdata);
381
382 if ((pipe_name != NULL)
383 && (!convert_string_talloc(state, CH_UNIX,
384 cli_ucs2(cli) ? CH_UTF16LE : CH_DOS,
385 pipe_name, strlen(pipe_name) + 1,
386 &state->pipe_name_conv,
387 &state->pipe_name_conv_len))) {
388 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
389 return tevent_req_post(req, ev);
390 }
391 state->fid = fid; /* trans2 */
392 state->function = function; /* nttrans */
393
394 state->setup = setup;
395 state->num_setup = num_setup;
396 state->max_setup = max_setup;
397
398 state->param = param;
399 state->num_param = num_param;
400 state->param_sent = 0;
401 state->rparam.max = max_param;
402
403 state->data = data;
404 state->num_data = num_data;
405 state->data_sent = 0;
406 state->rdata.max = max_data;
407
408 cli_trans_format(state, &wct, &iov_count);
409
410 subreq = cli_smb_req_create(state, ev, cli, cmd, 0, wct, state->vwv,
411 iov_count, state->iov);
412 if (tevent_req_nomem(subreq, req)) {
413 return tevent_req_post(req, ev);
414 }
415 state->mid = cli_smb_req_mid(subreq);
416 status = cli_smb_req_send(subreq);
417 if (!NT_STATUS_IS_OK(status)) {
418 tevent_req_nterror(req, status);
419 return tevent_req_post(req, state->ev);
420 }
421 cli_state_seqnum_persistent(cli, state->mid);
422 tevent_req_set_callback(subreq, cli_trans_done, req);
423 return req;
424 }
425
426 static void cli_trans_done(struct tevent_req *subreq)
427 {
428 struct tevent_req *req = tevent_req_callback_data(
429 subreq, struct tevent_req);
430 struct cli_trans_state *state = tevent_req_data(
431 req, struct cli_trans_state);
432 NTSTATUS status;
433 bool sent_all;
434 uint8_t wct;
435 uint16_t *vwv;
436 uint32_t num_bytes;
437 uint8_t *bytes;
438 uint8_t *inbuf;
439 uint8_t num_setup = 0;
440 uint16_t *setup = NULL;
441 uint32_t total_param = 0;
442 uint32_t num_param = 0;
443 uint32_t param_disp = 0;
444 uint32_t total_data = 0;
445 uint32_t num_data = 0;
446 uint32_t data_disp = 0;
447 uint8_t *param = NULL;
448 uint8_t *data = NULL;
449
450 status = cli_smb_recv(subreq, state, &inbuf, 0, &wct, &vwv,
451 &num_bytes, &bytes);
452 /*
453 * Do not TALLOC_FREE(subreq) here, we might receive more than
454 * one response for the same mid.
455 */
456
457 /*
458 * We can receive something like STATUS_MORE_ENTRIES, so don't use
459 * !NT_STATUS_IS_OK(status) here.
460 */
461
462 if (NT_STATUS_IS_ERR(status)) {
463 goto fail;
464 }
465
466 sent_all = ((state->param_sent == state->num_param)
467 && (state->data_sent == state->num_data));
468
469 status = cli_pull_trans(
470 inbuf, wct, vwv, num_bytes, bytes,
471 state->cmd, !sent_all, &num_setup, &setup,
472 &total_param, &num_param, &param_disp, &param,
473 &total_data, &num_data, &data_disp, &data);
474
475 if (!NT_STATUS_IS_OK(status)) {
476 goto fail;
477 }
478
479 if (!sent_all) {
480 int iov_count;
481
482 TALLOC_FREE(subreq);
483
484 cli_trans_format(state, &wct, &iov_count);
485
486 subreq = cli_smb_req_create(state, state->ev, state->cli,
487 state->cmd + 1, 0, wct, state->vwv,
488 iov_count, state->iov);
489 if (tevent_req_nomem(subreq, req)) {
490 return;
491 }
492 cli_smb_req_set_mid(subreq, state->mid);
493
494 status = cli_smb_req_send(subreq);
495
496 if (!NT_STATUS_IS_OK(status)) {
497 goto fail;
498 }
499 tevent_req_set_callback(subreq, cli_trans_done, req);
500 return;
501 }
502
503 status = cli_trans_pull_blob(
504 state, &state->rparam, total_param, num_param, param,
505 param_disp);
506
507 if (!NT_STATUS_IS_OK(status)) {
508 DEBUG(10, ("Pulling params failed: %s\n", nt_errstr(status)));
509 goto fail;
510 }
511
512 status = cli_trans_pull_blob(
513 state, &state->rdata, total_data, num_data, data,
514 data_disp);
515
516 if (!NT_STATUS_IS_OK(status)) {
517 DEBUG(10, ("Pulling data failed: %s\n", nt_errstr(status)));
518 goto fail;
519 }
520
521 if ((state->rparam.total == state->rparam.received)
522 && (state->rdata.total == state->rdata.received)) {
523 state->recv_flags2 = SVAL(inbuf, smb_flg2);
524 TALLOC_FREE(subreq);
525 cli_state_seqnum_remove(state->cli, state->mid);
526 tevent_req_done(req);
527 return;
528 }
529
530 TALLOC_FREE(inbuf);
531
532 if (!cli_smb_req_set_pending(subreq)) {
533 status = NT_STATUS_NO_MEMORY;
534 goto fail;
535 }
536 return;
537
538 fail:
539 cli_state_seqnum_remove(state->cli, state->mid);
540 TALLOC_FREE(subreq);
541 tevent_req_nterror(req, status);
542 }
543
544 NTSTATUS cli_trans_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
545 uint16_t *recv_flags2,
546 uint16_t **setup, uint8_t min_setup,
547 uint8_t *num_setup,
548 uint8_t **param, uint32_t min_param,
549 uint32_t *num_param,
550 uint8_t **data, uint32_t min_data,
551 uint32_t *num_data)
552 {
553 struct cli_trans_state *state = tevent_req_data(
554 req, struct cli_trans_state);
555 NTSTATUS status;
556
557 if (tevent_req_is_nterror(req, &status)) {
558 return status;
559 }
560
561 if ((state->num_rsetup < min_setup)
562 || (state->rparam.total < min_param)
563 || (state->rdata.total < min_data)) {
564 return NT_STATUS_INVALID_NETWORK_RESPONSE;
565 }
566
567 if (recv_flags2 != NULL) {
568 *recv_flags2 = state->recv_flags2;
569 }
570
571 if (setup != NULL) {
572 *setup = talloc_move(mem_ctx, &state->rsetup);
573 *num_setup = state->num_rsetup;
574 } else {
575 TALLOC_FREE(state->rsetup);
576 }
577
578 if (param != NULL) {
579 *param = talloc_move(mem_ctx, &state->rparam.data);
580 *num_param = state->rparam.total;
581 } else {
582 TALLOC_FREE(state->rparam.data);
583 }
584
585 if (data != NULL) {
586 *data = talloc_move(mem_ctx, &state->rdata.data);
587 *num_data = state->rdata.total;
588 } else {
589 TALLOC_FREE(state->rdata.data);
590 }
591
592 return NT_STATUS_OK;
593 }
594
595 NTSTATUS cli_trans(TALLOC_CTX *mem_ctx, struct cli_state *cli,
596 uint8_t trans_cmd,
597 const char *pipe_name, uint16_t fid, uint16_t function,
598 int flags,
599 uint16_t *setup, uint8_t num_setup, uint8_t max_setup,
600 uint8_t *param, uint32_t num_param, uint32_t max_param,
601 uint8_t *data, uint32_t num_data, uint32_t max_data,
602 uint16_t *recv_flags2,
603 uint16_t **rsetup, uint8_t min_rsetup, uint8_t *num_rsetup,
604 uint8_t **rparam, uint32_t min_rparam, uint32_t *num_rparam,
605 uint8_t **rdata, uint32_t min_rdata, uint32_t *num_rdata)
606 {
607 TALLOC_CTX *frame = talloc_stackframe();
608 struct event_context *ev;
609 struct tevent_req *req;
610 NTSTATUS status = NT_STATUS_OK;
611
612 if (cli_has_async_calls(cli)) {
613 /*
614 * Can't use sync call while an async call is in flight
615 */
616 status = NT_STATUS_INVALID_PARAMETER;
617 goto fail;
618 }
619
620 ev = event_context_init(frame);
621 if (ev == NULL) {
622 status = NT_STATUS_NO_MEMORY;
623 goto fail;
624 }
625
626 req = cli_trans_send(frame, ev, cli, trans_cmd,
627 pipe_name, fid, function, flags,
628 setup, num_setup, max_setup,
629 param, num_param, max_param,
630 data, num_data, max_data);
631 if (req == NULL) {
632 status = NT_STATUS_NO_MEMORY;
633 goto fail;
634 }
635
636 if (!tevent_req_poll(req, ev)) {
637 status = map_nt_error_from_unix(errno);
638 goto fail;
639 }
640
641 status = cli_trans_recv(req, mem_ctx, recv_flags2,
642 rsetup, min_rsetup, num_rsetup,
643 rparam, min_rparam, num_rparam,
644 rdata, min_rdata, num_rdata);
645 fail:
646 TALLOC_FREE(frame);
647 return status;
648 }
reg import