?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
s3:libsmb: fix smb signing for fragmented trans/trans2/nttrans requests
[Samba.git] / source3 / libsmb / clitrans.c
blobf5794ea04e65457e627f691b8d51b6a4b6643859
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
27 bool 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
159 bool 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
355 bool 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
476 bool 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 }
688
689 struct trans_recvblob {
690 uint8_t *data;
691 uint32_t max, total, received;
692 };
693
694 struct cli_trans_state {
695 struct cli_state *cli;
696 struct event_context *ev;
697 uint8_t cmd;
698 uint16_t mid;
699 const char *pipe_name;
700 uint16_t fid;
701 uint16_t function;
702 int flags;
703 uint16_t *setup;
704 uint8_t num_setup, max_setup;
705 uint8_t *param;
706 uint32_t num_param, param_sent;
707 uint8_t *data;
708 uint32_t num_data, data_sent;
709
710 uint8_t num_rsetup;
711 uint16_t *rsetup;
712 struct trans_recvblob rparam;
713 struct trans_recvblob rdata;
714
715 TALLOC_CTX *secondary_request_ctx;
716 };
717
718 static void cli_trans_recv_helper(struct async_req *req);
719
720 static struct async_req *cli_ship_trans(TALLOC_CTX *mem_ctx,
721 struct cli_trans_state *state)
722 {
723 TALLOC_CTX *frame;
724 struct async_req *result = NULL;
725 struct cli_request *cli_req;
726 uint8_t wct;
727 uint16_t *vwv;
728 uint8_t *bytes = NULL;
729 uint16_t param_offset;
730 uint16_t this_param = 0;
731 uint16_t this_data = 0;
732 uint32_t useable_space;
733 uint8_t cmd;
734
735 frame = talloc_stackframe();
736
737 cmd = state->cmd;
738
739 if ((state->param_sent != 0) || (state->data_sent != 0)) {
740 /* The secondary commands are one after the primary ones */
741 cmd += 1;
742 }
743
744 param_offset = smb_size - 4;
745
746 switch (cmd) {
747 case SMBtrans:
748 bytes = TALLOC_ZERO_P(talloc_tos(), uint8_t); /* padding */
749 if (bytes == NULL) {
750 goto fail;
751 }
752 bytes = smb_bytes_push_str(bytes, cli_ucs2(state->cli),
753 state->pipe_name,
754 strlen(state->pipe_name)+1, NULL);
755 if (bytes == NULL) {
756 goto fail;
757 }
758 wct = 14 + state->num_setup;
759 param_offset += talloc_get_size(bytes);
760 break;
761 case SMBtrans2:
762 bytes = TALLOC_ARRAY(talloc_tos(), uint8_t, 3); /* padding */
763 if (bytes == NULL) {
764 goto fail;
765 }
766 bytes[0] = 0;
767 bytes[1] = 'D'; /* Copy this from "old" 3.0 behaviour */
768 bytes[2] = ' ';
769 wct = 14 + state->num_setup;
770 param_offset += talloc_get_size(bytes);
771 break;
772 case SMBtranss:
773 wct = 8;
774 break;
775 case SMBtranss2:
776 wct = 9;
777 break;
778 case SMBnttrans:
779 wct = 19 + state->num_setup;
780 break;
781 case SMBnttranss:
782 wct = 18;
783 break;
784 default:
785 goto fail;
786 }
787
788 useable_space = state->cli->max_xmit - smb_size - sizeof(uint16_t)*wct;
789
790 if (state->param_sent < state->num_param) {
791 this_param = MIN(state->num_param - state->param_sent,
792 useable_space);
793 }
794
795 if (state->data_sent < state->num_data) {
796 this_data = MIN(state->num_data - state->data_sent,
797 useable_space - this_param);
798 }
799
800 vwv = TALLOC_ARRAY(talloc_tos(), uint16_t, wct);
801 if (vwv == NULL) {
802 goto fail;
803 }
804 param_offset += wct * sizeof(uint16_t);
805
806 DEBUG(10, ("num_setup=%u, max_setup=%u, "
807 "param_total=%u, this_param=%u, max_param=%u, "
808 "data_total=%u, this_data=%u, max_data=%u, "
809 "param_offset=%u, param_disp=%u, data_disp=%u\n",
810 (unsigned)state->num_setup, (unsigned)state->max_setup,
811 (unsigned)state->num_param, (unsigned)this_param,
812 (unsigned)state->rparam.max,
813 (unsigned)state->num_data, (unsigned)this_data,
814 (unsigned)state->rdata.max,
815 (unsigned)param_offset,
816 (unsigned)state->param_sent, (unsigned)state->data_sent));
817
818 switch (cmd) {
819 case SMBtrans:
820 case SMBtrans2:
821 SSVAL(vwv + 0, 0, state->num_param);
822 SSVAL(vwv + 1, 0, state->num_data);
823 SSVAL(vwv + 2, 0, state->rparam.max);
824 SSVAL(vwv + 3, 0, state->rdata.max);
825 SCVAL(vwv + 4, 0, state->max_setup);
826 SCVAL(vwv + 4, 1, 0); /* reserved */
827 SSVAL(vwv + 5, 0, state->flags);
828 SIVAL(vwv + 6, 0, 0); /* timeout */
829 SSVAL(vwv + 8, 0, 0); /* reserved */
830 SSVAL(vwv + 9, 0, this_param);
831 SSVAL(vwv +10, 0, param_offset);
832 SSVAL(vwv +11, 0, this_data);
833 SSVAL(vwv +12, 0, param_offset + this_param);
834 SCVAL(vwv +13, 0, state->num_setup);
835 SCVAL(vwv +13, 1, 0); /* reserved */
836 memcpy(vwv + 14, state->setup,
837 sizeof(uint16_t) * state->num_setup);
838 break;
839 case SMBtranss:
840 case SMBtranss2:
841 SSVAL(vwv + 0, 0, state->num_param);
842 SSVAL(vwv + 1, 0, state->num_data);
843 SSVAL(vwv + 2, 0, this_param);
844 SSVAL(vwv + 3, 0, param_offset);
845 SSVAL(vwv + 4, 0, state->param_sent);
846 SSVAL(vwv + 5, 0, this_data);
847 SSVAL(vwv + 6, 0, param_offset + this_param);
848 SSVAL(vwv + 7, 0, state->data_sent);
849 if (cmd == SMBtranss2) {
850 SSVAL(vwv + 8, 0, state->fid);
851 }
852 break;
853 case SMBnttrans:
854 SCVAL(vwv, 0, state->max_setup);
855 SSVAL(vwv, 1, 0); /* reserved */
856 SIVAL(vwv, 3, state->num_param);
857 SIVAL(vwv, 7, state->num_data);
858 SIVAL(vwv, 11, state->rparam.max);
859 SIVAL(vwv, 15, state->rdata.max);
860 SIVAL(vwv, 19, this_param);
861 SIVAL(vwv, 23, param_offset);
862 SIVAL(vwv, 27, this_data);
863 SIVAL(vwv, 31, param_offset + this_param);
864 SCVAL(vwv, 35, state->num_setup);
865 SSVAL(vwv, 36, state->function);
866 memcpy(vwv + 19, state->setup,
867 sizeof(uint16_t) * state->num_setup);
868 break;
869 case SMBnttranss:
870 SSVAL(vwv, 0, 0); /* reserved */
871 SCVAL(vwv, 2, 0); /* reserved */
872 SIVAL(vwv, 3, state->num_param);
873 SIVAL(vwv, 7, state->num_data);
874 SIVAL(vwv, 11, this_param);
875 SIVAL(vwv, 15, param_offset);
876 SIVAL(vwv, 19, state->param_sent);
877 SIVAL(vwv, 23, this_data);
878 SIVAL(vwv, 27, param_offset + this_param);
879 SIVAL(vwv, 31, state->data_sent);
880 SCVAL(vwv, 35, 0); /* reserved */
881 break;
882 }
883
884 bytes = (uint8_t *)talloc_append_blob(
885 talloc_tos(), bytes,
886 data_blob_const(state->param + state->param_sent, this_param));
887 if (bytes == NULL) {
888 goto fail;
889 }
890 state->param_sent += this_param;
891
892 bytes = (uint8_t *)talloc_append_blob(
893 talloc_tos(), bytes,
894 data_blob_const(state->data + state->data_sent, this_data));
895 if (bytes == NULL) {
896 goto fail;
897 }
898 state->data_sent += this_data;
899
900 if ((cmd == SMBtrans) || (cmd == SMBtrans2) || (cmd == SMBnttrans)) {
901 /*
902 * Primary request, retrieve our mid
903 */
904 result = cli_request_send(mem_ctx, state->ev, state->cli,
905 cmd, 0, wct, vwv, 0,
906 talloc_get_size(bytes), bytes);
907 if (result == NULL) {
908 goto fail;
909 }
910 cli_req = talloc_get_type_abort(result->private_data,
911 struct cli_request);
912 state->mid = cli_req->mid;
913 } else {
914 uint16_t num_bytes = talloc_get_size(bytes);
915 /*
916 * Secondary request, we have to fix up the mid. Thus we do
917 * the chain_cork/chain/uncork ourselves.
918 */
919 if (!cli_chain_cork(state->cli, state->ev,
920 wct * sizeof(uint16_t) + num_bytes + 3)) {
921 goto fail;
922 }
923 result = cli_request_send(mem_ctx, state->ev, state->cli, cmd,
924 0, wct, vwv, 0, num_bytes, bytes);
925 if (result == NULL) {
926 goto fail;
927 }
928 cli_req = talloc_get_type_abort(result->private_data,
929 struct cli_request);
930 cli_req->recv_helper.fn = cli_trans_recv_helper;
931 cli_req->recv_helper.priv = state;
932 cli_req->mid = state->mid;
933 client_set_trans_sign_state_off(state->cli, state->mid);
934 cli_chain_uncork(state->cli);
935 }
936
937 client_set_trans_sign_state_on(state->cli, state->mid);
938
939 fail:
940 TALLOC_FREE(frame);
941 return result;
942 }
943
944 static void cli_trans_ship_rest(struct async_req *req,
945 struct cli_trans_state *state)
946 {
947 state->secondary_request_ctx = talloc_new(state);
948 if (state->secondary_request_ctx == NULL) {
949 async_req_nterror(req, NT_STATUS_NO_MEMORY);
950 return;
951 }
952
953 while ((state->param_sent < state->num_param)
954 || (state->data_sent < state->num_data)) {
955 struct async_req *cli_req;
956
957 cli_req = cli_ship_trans(state->secondary_request_ctx, state);
958 if (cli_req == NULL) {
959 async_req_nterror(req, NT_STATUS_NO_MEMORY);
960 return;
961 }
962 }
963 }
964
965 static NTSTATUS cli_pull_trans(struct async_req *req,
966 struct cli_request *cli_req,
967 uint8_t smb_cmd, bool expect_first_reply,
968 uint8_t *pnum_setup, uint16_t **psetup,
969 uint32_t *ptotal_param, uint32_t *pnum_param,
970 uint32_t *pparam_disp, uint8_t **pparam,
971 uint32_t *ptotal_data, uint32_t *pnum_data,
972 uint32_t *pdata_disp, uint8_t **pdata)
973 {
974 uint32_t param_ofs, data_ofs;
975 uint8_t wct;
976 uint16_t *vwv;
977 uint16_t num_bytes;
978 uint8_t *bytes;
979 NTSTATUS status;
980
981 status = cli_pull_reply(req, &wct, &vwv, &num_bytes, &bytes);
982
983 /*
984 * We can receive something like STATUS_MORE_ENTRIES, so don't use
985 * !NT_STATUS_IS_OK(status) here.
986 */
987
988 if (NT_STATUS_IS_ERR(status)) {
989 return status;
990 }
991
992 if (expect_first_reply) {
993 if ((wct != 0) || (num_bytes != 0)) {
994 return NT_STATUS_INVALID_NETWORK_RESPONSE;
995 }
996 return NT_STATUS_OK;
997 }
998
999 switch (smb_cmd) {
1000 case SMBtrans:
1001 case SMBtrans2:
1002 if (wct < 10) {
1003 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1004 }
1005 *ptotal_param = SVAL(vwv + 0, 0);
1006 *ptotal_data = SVAL(vwv + 1, 0);
1007 *pnum_param = SVAL(vwv + 3, 0);
1008 param_ofs = SVAL(vwv + 4, 0);
1009 *pparam_disp = SVAL(vwv + 5, 0);
1010 *pnum_data = SVAL(vwv + 6, 0);
1011 data_ofs = SVAL(vwv + 7, 0);
1012 *pdata_disp = SVAL(vwv + 8, 0);
1013 *pnum_setup = CVAL(vwv + 9, 0);
1014 if (wct < 10 + (*pnum_setup)) {
1015 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1016 }
1017 *psetup = vwv + 10;
1018
1019 break;
1020 case SMBnttrans:
1021 if (wct < 18) {
1022 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1023 }
1024 *ptotal_param = IVAL(vwv, 3);
1025 *ptotal_data = IVAL(vwv, 7);
1026 *pnum_param = IVAL(vwv, 11);
1027 param_ofs = IVAL(vwv, 15);
1028 *pparam_disp = IVAL(vwv, 19);
1029 *pnum_data = IVAL(vwv, 23);
1030 data_ofs = IVAL(vwv, 27);
1031 *pdata_disp = IVAL(vwv, 31);
1032 *pnum_setup = CVAL(vwv, 35);
1033 *psetup = vwv + 18;
1034 break;
1035
1036 default:
1037 return NT_STATUS_INTERNAL_ERROR;
1038 }
1039
1040 /*
1041 * Check for buffer overflows. data_ofs needs to be checked against
1042 * the incoming buffer length, data_disp against the total
1043 * length. Likewise for param_ofs/param_disp.
1044 */
1045
1046 if (trans_oob(smb_len(cli_req->inbuf), param_ofs, *pnum_param)
1047 || trans_oob(*ptotal_param, *pparam_disp, *pnum_param)
1048 || trans_oob(smb_len(cli_req->inbuf), data_ofs, *pnum_data)
1049 || trans_oob(*ptotal_data, *pdata_disp, *pnum_data)) {
1050 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1051 }
1052
1053 *pparam = (uint8_t *)cli_req->inbuf + 4 + param_ofs;
1054 *pdata = (uint8_t *)cli_req->inbuf + 4 + data_ofs;
1055
1056 return NT_STATUS_OK;
1057 }
1058
1059 static NTSTATUS cli_trans_pull_blob(TALLOC_CTX *mem_ctx,
1060 struct trans_recvblob *blob,
1061 uint32_t total, uint32_t thistime,
1062 uint8_t *buf, uint32_t displacement)
1063 {
1064 if (blob->data == NULL) {
1065 if (total > blob->max) {
1066 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1067 }
1068 blob->total = total;
1069 blob->data = TALLOC_ARRAY(mem_ctx, uint8_t, total);
1070 if (blob->data == NULL) {
1071 return NT_STATUS_NO_MEMORY;
1072 }
1073 }
1074
1075 if (total > blob->total) {
1076 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1077 }
1078
1079 if (thistime) {
1080 memcpy(blob->data + displacement, buf, thistime);
1081 blob->received += thistime;
1082 }
1083
1084 return NT_STATUS_OK;
1085 }
1086
1087 static void cli_trans_recv_helper(struct async_req *req)
1088 {
1089 struct cli_request *cli_req = talloc_get_type_abort(
1090 req->private_data, struct cli_request);
1091 struct cli_trans_state *state = talloc_get_type_abort(
1092 cli_req->recv_helper.priv, struct cli_trans_state);
1093 uint8_t num_setup = 0;
1094 uint16_t *setup = NULL;
1095 uint32_t total_param = 0;
1096 uint32_t num_param = 0;
1097 uint32_t param_disp = 0;
1098 uint32_t total_data = 0;
1099 uint32_t num_data = 0;
1100 uint32_t data_disp = 0;
1101 uint8_t *param = NULL;
1102 uint8_t *data = NULL;
1103 bool sent_all;
1104 NTSTATUS status;
1105
1106 sent_all = (state->param_sent == state->num_param)
1107 && (state->data_sent == state->num_data);
1108
1109 status = cli_pull_trans(
1110 req, cli_req, state->cmd, !sent_all, &num_setup, &setup,
1111 &total_param, &num_param, &param_disp, &param,
1112 &total_data, &num_data, &data_disp, &data);
1113
1114 /*
1115 * We can receive something like STATUS_MORE_ENTRIES, so don't use
1116 * !NT_STATUS_IS_OK(status) here.
1117 */
1118
1119 if (NT_STATUS_IS_ERR(status)) {
1120 async_req_nterror(req, status);
1121 return;
1122 }
1123
1124 if (!sent_all) {
1125 cli_trans_ship_rest(req, state);
1126 return;
1127 }
1128
1129 /*
1130 * We've just received a real response. This means that we don't need
1131 * the secondary cli_request structures anymore, they have all been
1132 * shipped to the server.
1133 */
1134 TALLOC_FREE(state->secondary_request_ctx);
1135
1136 if (num_setup != 0) {
1137 TALLOC_FREE(state->rsetup);
1138 state->rsetup = (uint16_t *)TALLOC_MEMDUP(
1139 state, setup, sizeof(uint16_t) * num_setup);
1140 if (state->rsetup == NULL) {
1141 async_req_nterror(req, NT_STATUS_NO_MEMORY);
1142 return;
1143 }
1144 }
1145
1146 status = cli_trans_pull_blob(
1147 state, &state->rparam, total_param, num_param, param,
1148 param_disp);
1149
1150 if (!NT_STATUS_IS_OK(status)) {
1151 DEBUG(10, ("Pulling params failed: %s\n", nt_errstr(status)));
1152 async_req_nterror(req, status);
1153 return;
1154 }
1155
1156 status = cli_trans_pull_blob(
1157 state, &state->rdata, total_data, num_data, data,
1158 data_disp);
1159
1160 if (!NT_STATUS_IS_OK(status)) {
1161 DEBUG(10, ("Pulling data failed: %s\n", nt_errstr(status)));
1162 async_req_nterror(req, status);
1163 return;
1164 }
1165
1166 if ((state->rparam.total == state->rparam.received)
1167 && (state->rdata.total == state->rdata.received)) {
1168 client_set_trans_sign_state_off(state->cli, state->mid);
1169 async_req_done(req);
1170 }
1171 }
1172
1173 struct async_req *cli_trans_send(
1174 TALLOC_CTX *mem_ctx, struct event_context *ev,
1175 struct cli_state *cli, uint8_t trans_cmd,
1176 const char *pipe_name, uint16_t fid, uint16_t function, int flags,
1177 uint16_t *setup, uint8_t num_setup, uint8_t max_setup,
1178 uint8_t *param, uint32_t num_param, uint32_t max_param,
1179 uint8_t *data, uint32_t num_data, uint32_t max_data)
1180 {
1181 struct async_req *req;
1182 struct cli_request *cli_req;
1183 struct cli_trans_state *state;
1184
1185 /*
1186 * We can't use it in a chained request chain, we'd get the offset
1187 * calculations wrong.
1188 */
1189
1190 if (cli_in_chain(cli)) {
1191 return NULL;
1192 }
1193
1194 if ((trans_cmd == SMBtrans) || (trans_cmd == SMBtrans2)) {
1195 if ((num_param > 0xffff) || (max_param > 0xffff)
1196 || (num_data > 0xffff) || (max_data > 0xffff)) {
1197 DEBUG(3, ("Attempt to send invalid trans2 request "
1198 "(setup %u, params %u/%u, data %u/%u)\n",
1199 (unsigned)num_setup,
1200 (unsigned)num_param, (unsigned)max_param,
1201 (unsigned)num_data, (unsigned)max_data));
1202 return NULL;
1203 }
1204 }
1205
1206 state = talloc(mem_ctx, struct cli_trans_state);
1207 if (state == NULL) {
1208 goto nomem;
1209 }
1210
1211 state->cli = cli;
1212 state->ev = ev;
1213 state->cmd = trans_cmd;
1214 state->num_rsetup = 0;
1215 state->rsetup = NULL;
1216 ZERO_STRUCT(state->rparam);
1217 ZERO_STRUCT(state->rdata);
1218 state->secondary_request_ctx = NULL;
1219
1220 if (trans_cmd == SMBtrans) {
1221 state->pipe_name = talloc_strdup(state, pipe_name);
1222 if (state->pipe_name == NULL) {
1223 goto nomem;
1224 }
1225 }
1226 if (trans_cmd == SMBtrans2) {
1227 state->fid = fid;
1228 }
1229 if (trans_cmd == SMBnttrans) {
1230 state->function = function;
1231 }
1232
1233 state->flags = flags;
1234
1235 if (setup != NULL) {
1236 state->setup = (uint16_t *)TALLOC_MEMDUP(
1237 state, setup, sizeof(*setup) * num_setup);
1238 if (state->setup == NULL) {
1239 goto nomem;
1240 }
1241 state->num_setup = num_setup;
1242 } else {
1243 state->setup = NULL;
1244 state->num_setup = 0;
1245 }
1246
1247 state->max_setup = max_setup;
1248
1249 if (param != NULL) {
1250 state->param = (uint8_t *)TALLOC_MEMDUP(state, param,
1251 num_param);
1252 if (state->param == NULL) {
1253 goto nomem;
1254 }
1255 state->num_param = num_param;
1256 } else {
1257 state->param = NULL;
1258 state->num_param = 0;
1259 }
1260
1261 state->param_sent = 0;
1262 state->rparam.max = max_param;
1263
1264 if (data != NULL) {
1265 state->data = (uint8_t *)TALLOC_MEMDUP(state, data, num_data);
1266 if (state->data == NULL) {
1267 goto nomem;
1268 }
1269 state->num_data = num_data;
1270 } else {
1271 state->data = NULL;
1272 state->num_data = 0;
1273 }
1274
1275 state->data_sent = 0;
1276 state->rdata.max = max_data;
1277
1278 req = cli_ship_trans(state, state);
1279 if (req == NULL) {
1280 goto nomem;
1281 }
1282
1283 cli_req = talloc_get_type_abort(req->private_data, struct cli_request);
1284 cli_req->recv_helper.fn = cli_trans_recv_helper;
1285 cli_req->recv_helper.priv = state;
1286
1287 return req;
1288
1289 nomem:
1290 TALLOC_FREE(state);
1291 return NULL;
1292 }
1293
1294 NTSTATUS cli_trans_recv(struct async_req *req, TALLOC_CTX *mem_ctx,
1295 uint16_t **setup, uint8_t *num_setup,
1296 uint8_t **param, uint32_t *num_param,
1297 uint8_t **data, uint32_t *num_data)
1298 {
1299 struct cli_request *cli_req = talloc_get_type_abort(
1300 req->private_data, struct cli_request);
1301 struct cli_trans_state *state = talloc_get_type_abort(
1302 cli_req->recv_helper.priv, struct cli_trans_state);
1303 NTSTATUS status;
1304
1305 if (async_req_is_nterror(req, &status)) {
1306 return status;
1307 }
1308
1309 if (setup != NULL) {
1310 *setup = talloc_move(mem_ctx, &state->rsetup);
1311 *num_setup = state->num_rsetup;
1312 } else {
1313 TALLOC_FREE(state->rsetup);
1314 }
1315
1316 if (param != NULL) {
1317 *param = talloc_move(mem_ctx, &state->rparam.data);
1318 *num_param = state->rparam.total;
1319 } else {
1320 TALLOC_FREE(state->rparam.data);
1321 }
1322
1323 if (data != NULL) {
1324 *data = talloc_move(mem_ctx, &state->rdata.data);
1325 *num_data = state->rdata.total;
1326 } else {
1327 TALLOC_FREE(state->rdata.data);
1328 }
1329
1330 return NT_STATUS_OK;
1331 }
1332
1333 NTSTATUS cli_trans(TALLOC_CTX *mem_ctx, struct cli_state *cli,
1334 uint8_t trans_cmd,
1335 const char *pipe_name, uint16_t fid, uint16_t function,
1336 int flags,
1337 uint16_t *setup, uint8_t num_setup, uint8_t max_setup,
1338 uint8_t *param, uint32_t num_param, uint32_t max_param,
1339 uint8_t *data, uint32_t num_data, uint32_t max_data,
1340 uint16_t **rsetup, uint8_t *num_rsetup,
1341 uint8_t **rparam, uint32_t *num_rparam,
1342 uint8_t **rdata, uint32_t *num_rdata)
1343 {
1344 TALLOC_CTX *frame = talloc_stackframe();
1345 struct event_context *ev;
1346 struct async_req *req;
1347 NTSTATUS status = NT_STATUS_NO_MEMORY;
1348
1349 if (cli->fd_event != NULL) {
1350 /*
1351 * Can't use sync call while an async call is in flight
1352 */
1353 cli_set_error(cli, NT_STATUS_INVALID_PARAMETER);
1354 goto fail;
1355 }
1356
1357 ev = event_context_init(frame);
1358 if (ev == NULL) {
1359 goto fail;
1360 }
1361
1362 req = cli_trans_send(frame, ev, cli, trans_cmd,
1363 pipe_name, fid, function, flags,
1364 setup, num_setup, max_setup,
1365 param, num_param, max_param,
1366 data, num_data, max_data);
1367 if (req == NULL) {
1368 goto fail;
1369 }
1370
1371 while (req->state < ASYNC_REQ_DONE) {
1372 event_loop_once(ev);
1373 }
1374
1375 status = cli_trans_recv(req, mem_ctx, rsetup, num_rsetup,
1376 rparam, num_rparam, rdata, num_rdata);
1377 fail:
1378 TALLOC_FREE(frame);
1379 return status;
1380 }
Samba GIT mirror