source: branches/samba-3.3.x/source/libsmb/clitrans.c

Last change on this file was 223, checked in by Herwig Bauernfeind, 16 years ago

Update Samba 3.3 branch to 3.3.3
File size: 21.1 KB
RevLine 
[223]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 cli_set_message(cli->outbuf,trans==SMBtrans?8:9,0,True);
116 SCVAL(cli->outbuf,smb_com,(trans==SMBtrans ? SMBtranss : SMBtranss2));
117
118 outparam = smb_buf(cli->outbuf);
119 outdata = outparam+this_lparam;
120
121 /* secondary request */
122 SSVAL(cli->outbuf,smb_tpscnt,lparam); /* tpscnt */
123 SSVAL(cli->outbuf,smb_tdscnt,ldata); /* tdscnt */
124 SSVAL(cli->outbuf,smb_spscnt,this_lparam); /* pscnt */
125 SSVAL(cli->outbuf,smb_spsoff,smb_offset(outparam,cli->outbuf)); /* psoff */
126 SSVAL(cli->outbuf,smb_spsdisp,tot_param); /* psdisp */
127 SSVAL(cli->outbuf,smb_sdscnt,this_ldata); /* dscnt */
128 SSVAL(cli->outbuf,smb_sdsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
129 SSVAL(cli->outbuf,smb_sdsdisp,tot_data); /* dsdisp */
130 if (trans==SMBtrans2)
131 SSVALS(cli->outbuf,smb_sfid,fid); /* fid */
132 if (this_lparam) /* param[] */
133 memcpy(outparam,param+tot_param,this_lparam);
134 if (this_ldata) /* data[] */
135 memcpy(outdata,data+tot_data,this_ldata);
136 cli_setup_bcc(cli, outdata+this_ldata);
137
138 show_msg(cli->outbuf);
139
140 client_set_trans_sign_state_off(cli, mid);
141 cli->mid = mid;
142 if (!cli_send_smb(cli)) {
143 return False;
144 }
145 client_set_trans_sign_state_on(cli, mid);
146
147 tot_data += this_ldata;
148 tot_param += this_lparam;
149 }
150 }
151
152 return(True);
153}
154
155/****************************************************************************
156 Receive a SMB trans or trans2 response allocating the necessary memory.
157****************************************************************************/
158
159bool cli_receive_trans(struct cli_state *cli,int trans,
160 char **param, unsigned int *param_len,
161 char **data, unsigned int *data_len)
162{
163 unsigned int total_data=0;
164 unsigned int total_param=0;
165 unsigned int this_data,this_param;
166 NTSTATUS status;
167 bool ret = False;
168
169 *data_len = *param_len = 0;
170
171 if (!cli_receive_smb(cli)) {
172 return False;
173 }
174
175 show_msg(cli->inbuf);
176
177 /* sanity check */
178 if (CVAL(cli->inbuf,smb_com) != trans) {
179 DEBUG(0,("Expected %s response, got command 0x%02x\n",
180 trans==SMBtrans?"SMBtrans":"SMBtrans2",
181 CVAL(cli->inbuf,smb_com)));
182 return False;
183 }
184
185 /*
186 * An NT RPC pipe call can return ERRDOS, ERRmoredata
187 * to a trans call. This is not an error and should not
188 * be treated as such. Note that STATUS_NO_MORE_FILES is
189 * returned when a trans2 findfirst/next finishes.
190 * When setting up an encrypted transport we can also
191 * see NT_STATUS_MORE_PROCESSING_REQUIRED here.
192 *
193 * Vista returns NT_STATUS_INACCESSIBLE_SYSTEM_SHORTCUT if the folder
194 * "<share>/Users/All Users" is enumerated. This is a special pseudo
195 * folder, and the response does not have parameters (nor a parameter
196 * length).
197 */
198 status = cli_nt_error(cli);
199
200 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
201 if (NT_STATUS_IS_ERR(status) ||
202 NT_STATUS_EQUAL(status,STATUS_NO_MORE_FILES) ||
203 NT_STATUS_EQUAL(status,NT_STATUS_INACCESSIBLE_SYSTEM_SHORTCUT)) {
204 goto out;
205 }
206 }
207
208 /* parse out the lengths */
209 total_data = SVAL(cli->inbuf,smb_tdrcnt);
210 total_param = SVAL(cli->inbuf,smb_tprcnt);
211
212 /* allocate it */
213 if (total_data!=0) {
214 /* We know adding 2 is safe as total_data is an
215 * SVAL <= 0xFFFF. */
216 *data = (char *)SMB_REALLOC(*data,total_data+2);
217 if (!(*data)) {
218 DEBUG(0,("cli_receive_trans: failed to enlarge data buffer\n"));
219 goto out;
220 }
221 }
222
223 if (total_param!=0) {
224 /* We know adding 2 is safe as total_param is an
225 * SVAL <= 0xFFFF. */
226 *param = (char *)SMB_REALLOC(*param,total_param+2);
227 if (!(*param)) {
228 DEBUG(0,("cli_receive_trans: failed to enlarge param buffer\n"));
229 goto out;
230 }
231 }
232
233 for (;;) {
234 this_data = SVAL(cli->inbuf,smb_drcnt);
235 this_param = SVAL(cli->inbuf,smb_prcnt);
236
237 if (this_data + *data_len > total_data ||
238 this_param + *param_len > total_param) {
239 DEBUG(1,("Data overflow in cli_receive_trans\n"));
240 goto out;
241 }
242
243 if (this_data + *data_len < this_data ||
244 this_data + *data_len < *data_len ||
245 this_param + *param_len < this_param ||
246 this_param + *param_len < *param_len) {
247 DEBUG(1,("Data overflow in cli_receive_trans\n"));
248 goto out;
249 }
250
251 if (this_data) {
252 unsigned int data_offset_out = SVAL(cli->inbuf,smb_drdisp);
253 unsigned int data_offset_in = SVAL(cli->inbuf,smb_droff);
254
255 if (data_offset_out > total_data ||
256 data_offset_out + this_data > total_data ||
257 data_offset_out + this_data < data_offset_out ||
258 data_offset_out + this_data < this_data) {
259 DEBUG(1,("Data overflow in cli_receive_trans\n"));
260 goto out;
261 }
262 if (data_offset_in > cli->bufsize ||
263 data_offset_in + this_data > cli->bufsize ||
264 data_offset_in + this_data < data_offset_in ||
265 data_offset_in + this_data < this_data) {
266 DEBUG(1,("Data overflow in cli_receive_trans\n"));
267 goto out;
268 }
269
270 memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
271 }
272 if (this_param) {
273 unsigned int param_offset_out = SVAL(cli->inbuf,smb_prdisp);
274 unsigned int param_offset_in = SVAL(cli->inbuf,smb_proff);
275
276 if (param_offset_out > total_param ||
277 param_offset_out + this_param > total_param ||
278 param_offset_out + this_param < param_offset_out ||
279 param_offset_out + this_param < this_param) {
280 DEBUG(1,("Param overflow in cli_receive_trans\n"));
281 goto out;
282 }
283 if (param_offset_in > cli->bufsize ||
284 param_offset_in + this_param > cli->bufsize ||
285 param_offset_in + this_param < param_offset_in ||
286 param_offset_in + this_param < this_param) {
287 DEBUG(1,("Param overflow in cli_receive_trans\n"));
288 goto out;
289 }
290
291 memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
292 }
293 *data_len += this_data;
294 *param_len += this_param;
295
296 if (total_data <= *data_len && total_param <= *param_len) {
297 ret = True;
298 break;
299 }
300
301 if (!cli_receive_smb(cli)) {
302 goto out;
303 }
304
305 show_msg(cli->inbuf);
306
307 /* sanity check */
308 if (CVAL(cli->inbuf,smb_com) != trans) {
309 DEBUG(0,("Expected %s response, got command 0x%02x\n",
310 trans==SMBtrans?"SMBtrans":"SMBtrans2",
311 CVAL(cli->inbuf,smb_com)));
312 goto out;
313 }
314 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
315 if (NT_STATUS_IS_ERR(cli_nt_error(cli))) {
316 goto out;
317 }
318 }
319
320 /* parse out the total lengths again - they can shrink! */
321 if (SVAL(cli->inbuf,smb_tdrcnt) < total_data)
322 total_data = SVAL(cli->inbuf,smb_tdrcnt);
323 if (SVAL(cli->inbuf,smb_tprcnt) < total_param)
324 total_param = SVAL(cli->inbuf,smb_tprcnt);
325
326 if (total_data <= *data_len && total_param <= *param_len) {
327 ret = True;
328 break;
329 }
330 }
331
332 out:
333
334 if (ret) {
335 /* Ensure the last 2 bytes of param and data are 2 null
336 * bytes. These are malloc'ed, but not included in any
337 * length counts. This allows cli_XX string reading functions
338 * to safely null terminate. */
339 if (total_data) {
340 SSVAL(*data,total_data,0);
341 }
342 if (total_param) {
343 SSVAL(*param,total_param,0);
344 }
345 }
346
347 client_set_trans_sign_state_off(cli, SVAL(cli->inbuf,smb_mid));
348 return ret;
349}
350
351/****************************************************************************
352 Send a SMB nttrans request.
353****************************************************************************/
354
355bool cli_send_nt_trans(struct cli_state *cli,
356 int function,
357 int flags,
358 uint16 *setup, unsigned int lsetup, unsigned int msetup,
359 char *param, unsigned int lparam, unsigned int mparam,
360 char *data, unsigned int ldata, unsigned int mdata)
361{
362 unsigned int i;
363 unsigned int this_ldata,this_lparam;
364 unsigned int tot_data=0,tot_param=0;
365 uint16 mid;
366 char *outdata,*outparam;
367
368 this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
369 this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
370
371 memset(cli->outbuf,'\0',smb_size);
372 cli_set_message(cli->outbuf,19+lsetup,0,True);
373 SCVAL(cli->outbuf,smb_com,SMBnttrans);
374 SSVAL(cli->outbuf,smb_tid, cli->cnum);
375 cli_setup_packet(cli);
376
377 /*
378 * Save the mid we're using. We need this for finding
379 * signing replies.
380 */
381
382 mid = cli->mid;
383
384 outparam = smb_buf(cli->outbuf)+3;
385 outdata = outparam+this_lparam;
386
387 /* primary request */
388 SCVAL(cli->outbuf,smb_nt_MaxSetupCount,msetup);
389 SCVAL(cli->outbuf,smb_nt_Flags,flags);
390 SIVAL(cli->outbuf,smb_nt_TotalParameterCount, lparam);
391 SIVAL(cli->outbuf,smb_nt_TotalDataCount, ldata);
392 SIVAL(cli->outbuf,smb_nt_MaxParameterCount, mparam);
393 SIVAL(cli->outbuf,smb_nt_MaxDataCount, mdata);
394 SIVAL(cli->outbuf,smb_nt_ParameterCount, this_lparam);
395 SIVAL(cli->outbuf,smb_nt_ParameterOffset, smb_offset(outparam,cli->outbuf));
396 SIVAL(cli->outbuf,smb_nt_DataCount, this_ldata);
397 SIVAL(cli->outbuf,smb_nt_DataOffset, smb_offset(outdata,cli->outbuf));
398 SIVAL(cli->outbuf,smb_nt_SetupCount, lsetup);
399 SIVAL(cli->outbuf,smb_nt_Function, function);
400 for (i=0;i<lsetup;i++) /* setup[] */
401 SSVAL(cli->outbuf,smb_nt_SetupStart+i*2,setup[i]);
402
403 if (this_lparam) /* param[] */
404 memcpy(outparam,param,this_lparam);
405 if (this_ldata) /* data[] */
406 memcpy(outdata,data,this_ldata);
407
408 cli_setup_bcc(cli, outdata+this_ldata);
409
410 show_msg(cli->outbuf);
411 if (!cli_send_smb(cli)) {
412 return False;
413 }
414
415 /* Note we're in a trans state. Save the sequence
416 * numbers for replies. */
417 client_set_trans_sign_state_on(cli, mid);
418
419 if (this_ldata < ldata || this_lparam < lparam) {
420 /* receive interim response */
421 if (!cli_receive_smb(cli) || cli_is_error(cli)) {
422 client_set_trans_sign_state_off(cli, mid);
423 return(False);
424 }
425
426 tot_data = this_ldata;
427 tot_param = this_lparam;
428
429 while (tot_data < ldata || tot_param < lparam) {
430 this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
431 this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
432
433 cli_set_message(cli->outbuf,18,0,True);
434 SCVAL(cli->outbuf,smb_com,SMBnttranss);
435
436 /* XXX - these should probably be aligned */
437 outparam = smb_buf(cli->outbuf);
438 outdata = outparam+this_lparam;
439
440 /* secondary request */
441 SIVAL(cli->outbuf,smb_nts_TotalParameterCount,lparam);
442 SIVAL(cli->outbuf,smb_nts_TotalDataCount,ldata);
443 SIVAL(cli->outbuf,smb_nts_ParameterCount,this_lparam);
444 SIVAL(cli->outbuf,smb_nts_ParameterOffset,smb_offset(outparam,cli->outbuf));
445 SIVAL(cli->outbuf,smb_nts_ParameterDisplacement,tot_param);
446 SIVAL(cli->outbuf,smb_nts_DataCount,this_ldata);
447 SIVAL(cli->outbuf,smb_nts_DataOffset,smb_offset(outdata,cli->outbuf));
448 SIVAL(cli->outbuf,smb_nts_DataDisplacement,tot_data);
449 if (this_lparam) /* param[] */
450 memcpy(outparam,param+tot_param,this_lparam);
451 if (this_ldata) /* data[] */
452 memcpy(outdata,data+tot_data,this_ldata);
453 cli_setup_bcc(cli, outdata+this_ldata);
454
455 show_msg(cli->outbuf);
456
457 client_set_trans_sign_state_off(cli, mid);
458 cli->mid = mid;
459 if (!cli_send_smb(cli)) {
460 return False;
461 }
462 client_set_trans_sign_state_on(cli, mid);
463
464 tot_data += this_ldata;
465 tot_param += this_lparam;
466 }
467 }
468
469 return(True);
470}
471
472/****************************************************************************
473 Receive a SMB nttrans response allocating the necessary memory.
474****************************************************************************/
475
476bool cli_receive_nt_trans(struct cli_state *cli,
477 char **param, unsigned int *param_len,
478 char **data, unsigned int *data_len)
479{
480 unsigned int total_data=0;
481 unsigned int total_param=0;
482 unsigned int this_data,this_param;
483 uint8 eclass;
484 uint32 ecode;
485 bool ret = False;
486
487 *data_len = *param_len = 0;
488
489 if (!cli_receive_smb(cli)) {
490 return False;
491 }
492
493 show_msg(cli->inbuf);
494
495 /* sanity check */
496 if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
497 DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
498 CVAL(cli->inbuf,smb_com)));
499 return(False);
500 }
501
502 /*
503 * An NT RPC pipe call can return ERRDOS, ERRmoredata
504 * to a trans call. This is not an error and should not
505 * be treated as such.
506 */
507 if (cli_is_dos_error(cli)) {
508 cli_dos_error(cli, &eclass, &ecode);
509 if (!(eclass == ERRDOS && ecode == ERRmoredata)) {
510 goto out;
511 }
512 }
513
514 /*
515 * Likewise for NT_STATUS_BUFFER_TOO_SMALL
516 */
517 if (cli_is_nt_error(cli)) {
518 if (!NT_STATUS_EQUAL(cli_nt_error(cli),
519 NT_STATUS_BUFFER_TOO_SMALL)) {
520 goto out;
521 }
522 }
523
524 /* parse out the lengths */
525 total_data = IVAL(cli->inbuf,smb_ntr_TotalDataCount);
526 total_param = IVAL(cli->inbuf,smb_ntr_TotalParameterCount);
527 /* Only allow 16 megs. */
528 if (total_param > 16*1024*1024) {
529 DEBUG(0,("cli_receive_nt_trans: param buffer too large %d\n",
530 total_param));
531 goto out;
532 }
533 if (total_data > 16*1024*1024) {
534 DEBUG(0,("cli_receive_nt_trans: data buffer too large %d\n",
535 total_data));
536 goto out;
537 }
538
539 /* allocate it */
540 if (total_data) {
541 /* We know adding 2 is safe as total_data is less
542 * than 16mb (above). */
543 *data = (char *)SMB_REALLOC(*data,total_data+2);
544 if (!(*data)) {
545 DEBUG(0,("cli_receive_nt_trans: failed to enlarge data buffer to %d\n",total_data));
546 goto out;
547 }
548 }
549
550 if (total_param) {
551 /* We know adding 2 is safe as total_param is less
552 * than 16mb (above). */
553 *param = (char *)SMB_REALLOC(*param,total_param+2);
554 if (!(*param)) {
555 DEBUG(0,("cli_receive_nt_trans: failed to enlarge param buffer to %d\n", total_param));
556 goto out;
557 }
558 }
559
560 while (1) {
561 this_data = SVAL(cli->inbuf,smb_ntr_DataCount);
562 this_param = SVAL(cli->inbuf,smb_ntr_ParameterCount);
563
564 if (this_data + *data_len > total_data ||
565 this_param + *param_len > total_param) {
566 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
567 goto out;
568 }
569
570 if (this_data + *data_len < this_data ||
571 this_data + *data_len < *data_len ||
572 this_param + *param_len < this_param ||
573 this_param + *param_len < *param_len) {
574 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
575 goto out;
576 }
577
578 if (this_data) {
579 unsigned int data_offset_out = SVAL(cli->inbuf,smb_ntr_DataDisplacement);
580 unsigned int data_offset_in = SVAL(cli->inbuf,smb_ntr_DataOffset);
581
582 if (data_offset_out > total_data ||
583 data_offset_out + this_data > total_data ||
584 data_offset_out + this_data < data_offset_out ||
585 data_offset_out + this_data < this_data) {
586 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
587 goto out;
588 }
589 if (data_offset_in > cli->bufsize ||
590 data_offset_in + this_data > cli->bufsize ||
591 data_offset_in + this_data < data_offset_in ||
592 data_offset_in + this_data < this_data) {
593 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
594 goto out;
595 }
596
597 memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
598 }
599
600 if (this_param) {
601 unsigned int param_offset_out = SVAL(cli->inbuf,smb_ntr_ParameterDisplacement);
602 unsigned int param_offset_in = SVAL(cli->inbuf,smb_ntr_ParameterOffset);
603
604 if (param_offset_out > total_param ||
605 param_offset_out + this_param > total_param ||
606 param_offset_out + this_param < param_offset_out ||
607 param_offset_out + this_param < this_param) {
608 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
609 goto out;
610 }
611 if (param_offset_in > cli->bufsize ||
612 param_offset_in + this_param > cli->bufsize ||
613 param_offset_in + this_param < param_offset_in ||
614 param_offset_in + this_param < this_param) {
615 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
616 goto out;
617 }
618
619 memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
620 }
621
622 *data_len += this_data;
623 *param_len += this_param;
624
625 if (total_data <= *data_len && total_param <= *param_len) {
626 ret = True;
627 break;
628 }
629
630 if (!cli_receive_smb(cli)) {
631 goto out;
632 }
633
634 show_msg(cli->inbuf);
635
636 /* sanity check */
637 if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
638 DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
639 CVAL(cli->inbuf,smb_com)));
640 goto out;
641 }
642 if (cli_is_dos_error(cli)) {
643 cli_dos_error(cli, &eclass, &ecode);
644 if(!(eclass == ERRDOS && ecode == ERRmoredata)) {
645 goto out;
646 }
647 }
648 /*
649 * Likewise for NT_STATUS_BUFFER_TOO_SMALL
650 */
651 if (cli_is_nt_error(cli)) {
652 if (!NT_STATUS_EQUAL(cli_nt_error(cli),
653 NT_STATUS_BUFFER_TOO_SMALL)) {
654 goto out;
655 }
656 }
657
658 /* parse out the total lengths again - they can shrink! */
659 if (IVAL(cli->inbuf,smb_ntr_TotalDataCount) < total_data)
660 total_data = IVAL(cli->inbuf,smb_ntr_TotalDataCount);
661 if (IVAL(cli->inbuf,smb_ntr_TotalParameterCount) < total_param)
662 total_param = IVAL(cli->inbuf,smb_ntr_TotalParameterCount);
663
664 if (total_data <= *data_len && total_param <= *param_len) {
665 ret = True;
666 break;
667 }
668 }
669
670 out:
671
672 if (ret) {
673 /* Ensure the last 2 bytes of param and data are 2 null
674 * bytes. These are malloc'ed, but not included in any
675 * length counts. This allows cli_XX string reading functions
676 * to safely null terminate. */
677 if (total_data) {
678 SSVAL(*data,total_data,0);
679 }
680 if (total_param) {
681 SSVAL(*param,total_param,0);
682 }
683 }
684
685 client_set_trans_sign_state_off(cli, SVAL(cli->inbuf,smb_mid));
686 return ret;
687}
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