source: branches/samba-3.2.x/source/libsmb/clitrans.c@ 226

Last change on this file since 226 was 136, checked in by Paul Smedley, 17 years ago

Update trunk to 3.2.0rc1
File size: 21.5 KB
Line 
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
22
23/****************************************************************************
24 Send a SMB trans or trans2 request.
25****************************************************************************/
26
27bool cli_send_trans(struct cli_state *cli, int trans,
28 const char *pipe_name,
29 int fid, int flags,
30 uint16 *setup, unsigned int lsetup, unsigned int msetup,
31 const char *param, unsigned int lparam, unsigned int mparam,
32 const char *data, unsigned int ldata, unsigned int mdata)
33{
34 unsigned int i;
35 unsigned int this_ldata,this_lparam;
36 unsigned int tot_data=0,tot_param=0;
37 char *outdata,*outparam;
38 char *p;
39 int pipe_name_len=0;
40 uint16 mid;
41
42 this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
43 this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
44
45 memset(cli->outbuf,'\0',smb_size);
46 cli_set_message(cli->outbuf,14+lsetup,0,True);
47 SCVAL(cli->outbuf,smb_com,trans);
48 SSVAL(cli->outbuf,smb_tid, cli->cnum);
49 cli_setup_packet(cli);
50
51 /*
52 * Save the mid we're using. We need this for finding
53 * signing replies.
54 */
55
56 mid = cli->mid;
57
58 if (pipe_name) {
59 pipe_name_len = clistr_push(cli, smb_buf(cli->outbuf), pipe_name, -1, STR_TERMINATE);
60 }
61
62 outparam = smb_buf(cli->outbuf)+(trans==SMBtrans ? pipe_name_len : 3);
63 outdata = outparam+this_lparam;
64
65 /* primary request */
66 SSVAL(cli->outbuf,smb_tpscnt,lparam); /* tpscnt */
67 SSVAL(cli->outbuf,smb_tdscnt,ldata); /* tdscnt */
68 SSVAL(cli->outbuf,smb_mprcnt,mparam); /* mprcnt */
69 SSVAL(cli->outbuf,smb_mdrcnt,mdata); /* mdrcnt */
70 SCVAL(cli->outbuf,smb_msrcnt,msetup); /* msrcnt */
71 SSVAL(cli->outbuf,smb_flags,flags); /* flags */
72 SIVAL(cli->outbuf,smb_timeout,0); /* timeout */
73 SSVAL(cli->outbuf,smb_pscnt,this_lparam); /* pscnt */
74 SSVAL(cli->outbuf,smb_psoff,smb_offset(outparam,cli->outbuf)); /* psoff */
75 SSVAL(cli->outbuf,smb_dscnt,this_ldata); /* dscnt */
76 SSVAL(cli->outbuf,smb_dsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
77 SCVAL(cli->outbuf,smb_suwcnt,lsetup); /* suwcnt */
78 for (i=0;i<lsetup;i++) /* setup[] */
79 SSVAL(cli->outbuf,smb_setup+i*2,setup[i]);
80 p = smb_buf(cli->outbuf);
81 if (trans != SMBtrans) {
82 *p++ = 0; /* put in a null smb_name */
83 *p++ = 'D'; *p++ = ' '; /* observed in OS/2 */
84 }
85 if (this_lparam) /* param[] */
86 memcpy(outparam,param,this_lparam);
87 if (this_ldata) /* data[] */
88 memcpy(outdata,data,this_ldata);
89 cli_setup_bcc(cli, outdata+this_ldata);
90
91 show_msg(cli->outbuf);
92
93 if (!cli_send_smb(cli)) {
94 return False;
95 }
96
97 /* Note we're in a trans state. Save the sequence
98 * numbers for replies. */
99 client_set_trans_sign_state_on(cli, mid);
100
101 if (this_ldata < ldata || this_lparam < lparam) {
102 /* receive interim response */
103 if (!cli_receive_smb(cli) || cli_is_error(cli)) {
104 client_set_trans_sign_state_off(cli, mid);
105 return(False);
106 }
107
108 tot_data = this_ldata;
109 tot_param = this_lparam;
110
111 while (tot_data < ldata || tot_param < lparam) {
112 this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
113 this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
114
115 client_set_trans_sign_state_off(cli, mid);
116 client_set_trans_sign_state_on(cli, mid);
117
118 cli_set_message(cli->outbuf,trans==SMBtrans?8:9,0,True);
119 SCVAL(cli->outbuf,smb_com,(trans==SMBtrans ? SMBtranss : SMBtranss2));
120
121 outparam = smb_buf(cli->outbuf);
122 outdata = outparam+this_lparam;
123
124 /* secondary request */
125 SSVAL(cli->outbuf,smb_tpscnt,lparam); /* tpscnt */
126 SSVAL(cli->outbuf,smb_tdscnt,ldata); /* tdscnt */
127 SSVAL(cli->outbuf,smb_spscnt,this_lparam); /* pscnt */
128 SSVAL(cli->outbuf,smb_spsoff,smb_offset(outparam,cli->outbuf)); /* psoff */
129 SSVAL(cli->outbuf,smb_spsdisp,tot_param); /* psdisp */
130 SSVAL(cli->outbuf,smb_sdscnt,this_ldata); /* dscnt */
131 SSVAL(cli->outbuf,smb_sdsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
132 SSVAL(cli->outbuf,smb_sdsdisp,tot_data); /* dsdisp */
133 if (trans==SMBtrans2)
134 SSVALS(cli->outbuf,smb_sfid,fid); /* fid */
135 if (this_lparam) /* param[] */
136 memcpy(outparam,param+tot_param,this_lparam);
137 if (this_ldata) /* data[] */
138 memcpy(outdata,data+tot_data,this_ldata);
139 cli_setup_bcc(cli, outdata+this_ldata);
140
141 /*
142 * Save the mid we're using. We need this for finding
143 * signing replies.
144 */
145 mid = cli->mid;
146
147 show_msg(cli->outbuf);
148 if (!cli_send_smb(cli)) {
149 client_set_trans_sign_state_off(cli, mid);
150 return False;
151 }
152
153 /* Ensure we use the same mid for the secondaries. */
154 cli->mid = mid;
155
156 tot_data += this_ldata;
157 tot_param += this_lparam;
158 }
159 }
160
161 return(True);
162}
163
164/****************************************************************************
165 Receive a SMB trans or trans2 response allocating the necessary memory.
166****************************************************************************/
167
168bool cli_receive_trans(struct cli_state *cli,int trans,
169 char **param, unsigned int *param_len,
170 char **data, unsigned int *data_len)
171{
172 unsigned int total_data=0;
173 unsigned int total_param=0;
174 unsigned int this_data,this_param;
175 NTSTATUS status;
176 bool ret = False;
177
178 *data_len = *param_len = 0;
179
180 if (!cli_receive_smb(cli)) {
181 return False;
182 }
183
184 show_msg(cli->inbuf);
185
186 /* sanity check */
187 if (CVAL(cli->inbuf,smb_com) != trans) {
188 DEBUG(0,("Expected %s response, got command 0x%02x\n",
189 trans==SMBtrans?"SMBtrans":"SMBtrans2",
190 CVAL(cli->inbuf,smb_com)));
191 return False;
192 }
193
194 /*
195 * An NT RPC pipe call can return ERRDOS, ERRmoredata
196 * to a trans call. This is not an error and should not
197 * be treated as such. Note that STATUS_NO_MORE_FILES is
198 * returned when a trans2 findfirst/next finishes.
199 * When setting up an encrypted transport we can also
200 * see NT_STATUS_MORE_PROCESSING_REQUIRED here.
201 *
202 * Vista returns NT_STATUS_INACCESSIBLE_SYSTEM_SHORTCUT if the folder
203 * "<share>/Users/All Users" is enumerated. This is a special pseudo
204 * folder, and the response does not have parameters (nor a parameter
205 * length).
206 */
207 status = cli_nt_error(cli);
208
209 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
210 if (NT_STATUS_IS_ERR(status) ||
211 NT_STATUS_EQUAL(status,STATUS_NO_MORE_FILES) ||
212 NT_STATUS_EQUAL(status,NT_STATUS_INACCESSIBLE_SYSTEM_SHORTCUT)) {
213 goto out;
214 }
215 }
216
217 /* parse out the lengths */
218 total_data = SVAL(cli->inbuf,smb_tdrcnt);
219 total_param = SVAL(cli->inbuf,smb_tprcnt);
220
221 /* allocate it */
222 if (total_data!=0) {
223 /* We know adding 2 is safe as total_data is an
224 * SVAL <= 0xFFFF. */
225 *data = (char *)SMB_REALLOC(*data,total_data+2);
226 if (!(*data)) {
227 DEBUG(0,("cli_receive_trans: failed to enlarge data buffer\n"));
228 goto out;
229 }
230 }
231
232 if (total_param!=0) {
233 /* We know adding 2 is safe as total_param is an
234 * SVAL <= 0xFFFF. */
235 *param = (char *)SMB_REALLOC(*param,total_param+2);
236 if (!(*param)) {
237 DEBUG(0,("cli_receive_trans: failed to enlarge param buffer\n"));
238 goto out;
239 }
240 }
241
242 for (;;) {
243 this_data = SVAL(cli->inbuf,smb_drcnt);
244 this_param = SVAL(cli->inbuf,smb_prcnt);
245
246 if (this_data + *data_len > total_data ||
247 this_param + *param_len > total_param) {
248 DEBUG(1,("Data overflow in cli_receive_trans\n"));
249 goto out;
250 }
251
252 if (this_data + *data_len < this_data ||
253 this_data + *data_len < *data_len ||
254 this_param + *param_len < this_param ||
255 this_param + *param_len < *param_len) {
256 DEBUG(1,("Data overflow in cli_receive_trans\n"));
257 goto out;
258 }
259
260 if (this_data) {
261 unsigned int data_offset_out = SVAL(cli->inbuf,smb_drdisp);
262 unsigned int data_offset_in = SVAL(cli->inbuf,smb_droff);
263
264 if (data_offset_out > total_data ||
265 data_offset_out + this_data > total_data ||
266 data_offset_out + this_data < data_offset_out ||
267 data_offset_out + this_data < this_data) {
268 DEBUG(1,("Data overflow in cli_receive_trans\n"));
269 goto out;
270 }
271 if (data_offset_in > cli->bufsize ||
272 data_offset_in + this_data > cli->bufsize ||
273 data_offset_in + this_data < data_offset_in ||
274 data_offset_in + this_data < this_data) {
275 DEBUG(1,("Data overflow in cli_receive_trans\n"));
276 goto out;
277 }
278
279 memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
280 }
281 if (this_param) {
282 unsigned int param_offset_out = SVAL(cli->inbuf,smb_prdisp);
283 unsigned int param_offset_in = SVAL(cli->inbuf,smb_proff);
284
285 if (param_offset_out > total_param ||
286 param_offset_out + this_param > total_param ||
287 param_offset_out + this_param < param_offset_out ||
288 param_offset_out + this_param < this_param) {
289 DEBUG(1,("Param overflow in cli_receive_trans\n"));
290 goto out;
291 }
292 if (param_offset_in > cli->bufsize ||
293 param_offset_in + this_param > cli->bufsize ||
294 param_offset_in + this_param < param_offset_in ||
295 param_offset_in + this_param < this_param) {
296 DEBUG(1,("Param overflow in cli_receive_trans\n"));
297 goto out;
298 }
299
300 memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
301 }
302 *data_len += this_data;
303 *param_len += this_param;
304
305 if (total_data <= *data_len && total_param <= *param_len) {
306 ret = True;
307 break;
308 }
309
310 if (!cli_receive_smb(cli)) {
311 goto out;
312 }
313
314 show_msg(cli->inbuf);
315
316 /* sanity check */
317 if (CVAL(cli->inbuf,smb_com) != trans) {
318 DEBUG(0,("Expected %s response, got command 0x%02x\n",
319 trans==SMBtrans?"SMBtrans":"SMBtrans2",
320 CVAL(cli->inbuf,smb_com)));
321 goto out;
322 }
323 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
324 if (NT_STATUS_IS_ERR(cli_nt_error(cli))) {
325 goto out;
326 }
327 }
328
329 /* parse out the total lengths again - they can shrink! */
330 if (SVAL(cli->inbuf,smb_tdrcnt) < total_data)
331 total_data = SVAL(cli->inbuf,smb_tdrcnt);
332 if (SVAL(cli->inbuf,smb_tprcnt) < total_param)
333 total_param = SVAL(cli->inbuf,smb_tprcnt);
334
335 if (total_data <= *data_len && total_param <= *param_len) {
336 ret = True;
337 break;
338 }
339 }
340
341 out:
342
343 if (ret) {
344 /* Ensure the last 2 bytes of param and data are 2 null
345 * bytes. These are malloc'ed, but not included in any
346 * length counts. This allows cli_XX string reading functions
347 * to safely null terminate. */
348 if (total_data) {
349 SSVAL(*data,total_data,0);
350 }
351 if (total_param) {
352 SSVAL(*param,total_param,0);
353 }
354 }
355
356 client_set_trans_sign_state_off(cli, SVAL(cli->inbuf,smb_mid));
357 return ret;
358}
359
360/****************************************************************************
361 Send a SMB nttrans request.
362****************************************************************************/
363
364bool cli_send_nt_trans(struct cli_state *cli,
365 int function,
366 int flags,
367 uint16 *setup, unsigned int lsetup, unsigned int msetup,
368 char *param, unsigned int lparam, unsigned int mparam,
369 char *data, unsigned int ldata, unsigned int mdata)
370{
371 unsigned int i;
372 unsigned int this_ldata,this_lparam;
373 unsigned int tot_data=0,tot_param=0;
374 uint16 mid;
375 char *outdata,*outparam;
376
377 this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
378 this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
379
380 memset(cli->outbuf,'\0',smb_size);
381 cli_set_message(cli->outbuf,19+lsetup,0,True);
382 SCVAL(cli->outbuf,smb_com,SMBnttrans);
383 SSVAL(cli->outbuf,smb_tid, cli->cnum);
384 cli_setup_packet(cli);
385
386 /*
387 * Save the mid we're using. We need this for finding
388 * signing replies.
389 */
390
391 mid = cli->mid;
392
393 outparam = smb_buf(cli->outbuf)+3;
394 outdata = outparam+this_lparam;
395
396 /* primary request */
397 SCVAL(cli->outbuf,smb_nt_MaxSetupCount,msetup);
398 SCVAL(cli->outbuf,smb_nt_Flags,flags);
399 SIVAL(cli->outbuf,smb_nt_TotalParameterCount, lparam);
400 SIVAL(cli->outbuf,smb_nt_TotalDataCount, ldata);
401 SIVAL(cli->outbuf,smb_nt_MaxParameterCount, mparam);
402 SIVAL(cli->outbuf,smb_nt_MaxDataCount, mdata);
403 SIVAL(cli->outbuf,smb_nt_ParameterCount, this_lparam);
404 SIVAL(cli->outbuf,smb_nt_ParameterOffset, smb_offset(outparam,cli->outbuf));
405 SIVAL(cli->outbuf,smb_nt_DataCount, this_ldata);
406 SIVAL(cli->outbuf,smb_nt_DataOffset, smb_offset(outdata,cli->outbuf));
407 SIVAL(cli->outbuf,smb_nt_SetupCount, lsetup);
408 SIVAL(cli->outbuf,smb_nt_Function, function);
409 for (i=0;i<lsetup;i++) /* setup[] */
410 SSVAL(cli->outbuf,smb_nt_SetupStart+i*2,setup[i]);
411
412 if (this_lparam) /* param[] */
413 memcpy(outparam,param,this_lparam);
414 if (this_ldata) /* data[] */
415 memcpy(outdata,data,this_ldata);
416
417 cli_setup_bcc(cli, outdata+this_ldata);
418
419 show_msg(cli->outbuf);
420 if (!cli_send_smb(cli)) {
421 return False;
422 }
423
424 /* Note we're in a trans state. Save the sequence
425 * numbers for replies. */
426 client_set_trans_sign_state_on(cli, mid);
427
428 if (this_ldata < ldata || this_lparam < lparam) {
429 /* receive interim response */
430 if (!cli_receive_smb(cli) || cli_is_error(cli)) {
431 client_set_trans_sign_state_off(cli, mid);
432 return(False);
433 }
434
435 tot_data = this_ldata;
436 tot_param = this_lparam;
437
438 while (tot_data < ldata || tot_param < lparam) {
439 this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
440 this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
441
442 cli_set_message(cli->outbuf,18,0,True);
443 SCVAL(cli->outbuf,smb_com,SMBnttranss);
444
445 /* XXX - these should probably be aligned */
446 outparam = smb_buf(cli->outbuf);
447 outdata = outparam+this_lparam;
448
449 /* secondary request */
450 SIVAL(cli->outbuf,smb_nts_TotalParameterCount,lparam);
451 SIVAL(cli->outbuf,smb_nts_TotalDataCount,ldata);
452 SIVAL(cli->outbuf,smb_nts_ParameterCount,this_lparam);
453 SIVAL(cli->outbuf,smb_nts_ParameterOffset,smb_offset(outparam,cli->outbuf));
454 SIVAL(cli->outbuf,smb_nts_ParameterDisplacement,tot_param);
455 SIVAL(cli->outbuf,smb_nts_DataCount,this_ldata);
456 SIVAL(cli->outbuf,smb_nts_DataOffset,smb_offset(outdata,cli->outbuf));
457 SIVAL(cli->outbuf,smb_nts_DataDisplacement,tot_data);
458 if (this_lparam) /* param[] */
459 memcpy(outparam,param+tot_param,this_lparam);
460 if (this_ldata) /* data[] */
461 memcpy(outdata,data+tot_data,this_ldata);
462 cli_setup_bcc(cli, outdata+this_ldata);
463
464 /*
465 * Save the mid we're using. We need this for finding
466 * signing replies.
467 */
468 mid = cli->mid;
469
470 show_msg(cli->outbuf);
471
472 if (!cli_send_smb(cli)) {
473 client_set_trans_sign_state_off(cli, mid);
474 return False;
475 }
476
477 /* Ensure we use the same mid for the secondaries. */
478 cli->mid = mid;
479
480 tot_data += this_ldata;
481 tot_param += this_lparam;
482 }
483 }
484
485 return(True);
486}
487
488/****************************************************************************
489 Receive a SMB nttrans response allocating the necessary memory.
490****************************************************************************/
491
492bool cli_receive_nt_trans(struct cli_state *cli,
493 char **param, unsigned int *param_len,
494 char **data, unsigned int *data_len)
495{
496 unsigned int total_data=0;
497 unsigned int total_param=0;
498 unsigned int this_data,this_param;
499 uint8 eclass;
500 uint32 ecode;
501 bool ret = False;
502
503 *data_len = *param_len = 0;
504
505 if (!cli_receive_smb(cli)) {
506 return False;
507 }
508
509 show_msg(cli->inbuf);
510
511 /* sanity check */
512 if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
513 DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
514 CVAL(cli->inbuf,smb_com)));
515 return(False);
516 }
517
518 /*
519 * An NT RPC pipe call can return ERRDOS, ERRmoredata
520 * to a trans call. This is not an error and should not
521 * be treated as such.
522 */
523 if (cli_is_dos_error(cli)) {
524 cli_dos_error(cli, &eclass, &ecode);
525 if (!(eclass == ERRDOS && ecode == ERRmoredata)) {
526 goto out;
527 }
528 }
529
530 /*
531 * Likewise for NT_STATUS_BUFFER_TOO_SMALL
532 */
533 if (cli_is_nt_error(cli)) {
534 if (!NT_STATUS_EQUAL(cli_nt_error(cli),
535 NT_STATUS_BUFFER_TOO_SMALL)) {
536 goto out;
537 }
538 }
539
540 /* parse out the lengths */
541 total_data = IVAL(cli->inbuf,smb_ntr_TotalDataCount);
542 total_param = IVAL(cli->inbuf,smb_ntr_TotalParameterCount);
543 /* Only allow 16 megs. */
544 if (total_param > 16*1024*1024) {
545 DEBUG(0,("cli_receive_nt_trans: param buffer too large %d\n",
546 total_param));
547 goto out;
548 }
549 if (total_data > 16*1024*1024) {
550 DEBUG(0,("cli_receive_nt_trans: data buffer too large %d\n",
551 total_data));
552 goto out;
553 }
554
555 /* allocate it */
556 if (total_data) {
557 /* We know adding 2 is safe as total_data is less
558 * than 16mb (above). */
559 *data = (char *)SMB_REALLOC(*data,total_data+2);
560 if (!(*data)) {
561 DEBUG(0,("cli_receive_nt_trans: failed to enlarge data buffer to %d\n",total_data));
562 goto out;
563 }
564 }
565
566 if (total_param) {
567 /* We know adding 2 is safe as total_param is less
568 * than 16mb (above). */
569 *param = (char *)SMB_REALLOC(*param,total_param+2);
570 if (!(*param)) {
571 DEBUG(0,("cli_receive_nt_trans: failed to enlarge param buffer to %d\n", total_param));
572 goto out;
573 }
574 }
575
576 while (1) {
577 this_data = SVAL(cli->inbuf,smb_ntr_DataCount);
578 this_param = SVAL(cli->inbuf,smb_ntr_ParameterCount);
579
580 if (this_data + *data_len > total_data ||
581 this_param + *param_len > total_param) {
582 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
583 goto out;
584 }
585
586 if (this_data + *data_len < this_data ||
587 this_data + *data_len < *data_len ||
588 this_param + *param_len < this_param ||
589 this_param + *param_len < *param_len) {
590 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
591 goto out;
592 }
593
594 if (this_data) {
595 unsigned int data_offset_out = SVAL(cli->inbuf,smb_ntr_DataDisplacement);
596 unsigned int data_offset_in = SVAL(cli->inbuf,smb_ntr_DataOffset);
597
598 if (data_offset_out > total_data ||
599 data_offset_out + this_data > total_data ||
600 data_offset_out + this_data < data_offset_out ||
601 data_offset_out + this_data < this_data) {
602 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
603 goto out;
604 }
605 if (data_offset_in > cli->bufsize ||
606 data_offset_in + this_data > cli->bufsize ||
607 data_offset_in + this_data < data_offset_in ||
608 data_offset_in + this_data < this_data) {
609 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
610 goto out;
611 }
612
613 memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
614 }
615
616 if (this_param) {
617 unsigned int param_offset_out = SVAL(cli->inbuf,smb_ntr_ParameterDisplacement);
618 unsigned int param_offset_in = SVAL(cli->inbuf,smb_ntr_ParameterOffset);
619
620 if (param_offset_out > total_param ||
621 param_offset_out + this_param > total_param ||
622 param_offset_out + this_param < param_offset_out ||
623 param_offset_out + this_param < this_param) {
624 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
625 goto out;
626 }
627 if (param_offset_in > cli->bufsize ||
628 param_offset_in + this_param > cli->bufsize ||
629 param_offset_in + this_param < param_offset_in ||
630 param_offset_in + this_param < this_param) {
631 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
632 goto out;
633 }
634
635 memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
636 }
637
638 *data_len += this_data;
639 *param_len += this_param;
640
641 if (total_data <= *data_len && total_param <= *param_len) {
642 ret = True;
643 break;
644 }
645
646 if (!cli_receive_smb(cli)) {
647 goto out;
648 }
649
650 show_msg(cli->inbuf);
651
652 /* sanity check */
653 if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
654 DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
655 CVAL(cli->inbuf,smb_com)));
656 goto out;
657 }
658 if (cli_is_dos_error(cli)) {
659 cli_dos_error(cli, &eclass, &ecode);
660 if(!(eclass == ERRDOS && ecode == ERRmoredata)) {
661 goto out;
662 }
663 }
664 /*
665 * Likewise for NT_STATUS_BUFFER_TOO_SMALL
666 */
667 if (cli_is_nt_error(cli)) {
668 if (!NT_STATUS_EQUAL(cli_nt_error(cli),
669 NT_STATUS_BUFFER_TOO_SMALL)) {
670 goto out;
671 }
672 }
673
674 /* parse out the total lengths again - they can shrink! */
675 if (IVAL(cli->inbuf,smb_ntr_TotalDataCount) < total_data)
676 total_data = IVAL(cli->inbuf,smb_ntr_TotalDataCount);
677 if (IVAL(cli->inbuf,smb_ntr_TotalParameterCount) < total_param)
678 total_param = IVAL(cli->inbuf,smb_ntr_TotalParameterCount);
679
680 if (total_data <= *data_len && total_param <= *param_len) {
681 ret = True;
682 break;
683 }
684 }
685
686 out:
687
688 if (ret) {
689 /* Ensure the last 2 bytes of param and data are 2 null
690 * bytes. These are malloc'ed, but not included in any
691 * length counts. This allows cli_XX string reading functions
692 * to safely null terminate. */
693 if (total_data) {
694 SSVAL(*data,total_data,0);
695 }
696 if (total_param) {
697 SSVAL(*param,total_param,0);
698 }
699 }
700
701 client_set_trans_sign_state_off(cli, SVAL(cli->inbuf,smb_mid));
702 return ret;
703}
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