source: branches/samba-3.2.x/source/smbd/ipc.c@ 204

Last change on this file since 204 was 133, checked in by Paul Smedley, 17 years ago

Update trunk to 3.2.0pre3
File size: 21.2 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 Inter-process communication and named pipe handling
4 Copyright (C) Andrew Tridgell 1992-1998
5
6 SMB Version handling
7 Copyright (C) John H Terpstra 1995-1998
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 */
22/*
23 This file handles the named pipe and mailslot calls
24 in the SMBtrans protocol
25 */
26
27#include "includes.h"
28
29extern int max_send;
30
31#define NERR_notsupported 50
32
33static void api_no_reply(connection_struct *conn, struct smb_request *req);
34
35/*******************************************************************
36 copies parameters and data, as needed, into the smb buffer
37
38 *both* the data and params sections should be aligned. this
39 is fudged in the rpc pipes by
40 at present, only the data section is. this may be a possible
41 cause of some of the ipc problems being experienced. lkcl26dec97
42
43 ******************************************************************/
44
45static void copy_trans_params_and_data(char *outbuf, int align,
46 char *rparam, int param_offset, int param_len,
47 char *rdata, int data_offset, int data_len)
48{
49 char *copy_into = smb_buf(outbuf);
50
51 if(param_len < 0)
52 param_len = 0;
53
54 if(data_len < 0)
55 data_len = 0;
56
57 DEBUG(5,("copy_trans_params_and_data: params[%d..%d] data[%d..%d] (align %d)\n",
58 param_offset, param_offset + param_len,
59 data_offset , data_offset + data_len,
60 align));
61
62 *copy_into = '\0';
63
64 copy_into += 1;
65
66 if (param_len)
67 memcpy(copy_into, &rparam[param_offset], param_len);
68
69 copy_into += param_len;
70 if (align) {
71 memset(copy_into, '\0', align);
72 }
73
74 copy_into += align;
75
76 if (data_len )
77 memcpy(copy_into, &rdata[data_offset], data_len);
78}
79
80/****************************************************************************
81 Send a trans reply.
82 ****************************************************************************/
83
84void send_trans_reply(connection_struct *conn,
85 struct smb_request *req,
86 char *rparam, int rparam_len,
87 char *rdata, int rdata_len,
88 bool buffer_too_large)
89{
90 int this_ldata,this_lparam;
91 int tot_data_sent = 0;
92 int tot_param_sent = 0;
93 int align;
94
95 int ldata = rdata ? rdata_len : 0;
96 int lparam = rparam ? rparam_len : 0;
97
98 if (buffer_too_large)
99 DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
100
101 this_lparam = MIN(lparam,max_send - 500); /* hack */
102 this_ldata = MIN(ldata,max_send - (500+this_lparam));
103
104 align = ((this_lparam)%4);
105
106 reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
107
108 copy_trans_params_and_data((char *)req->outbuf, align,
109 rparam, tot_param_sent, this_lparam,
110 rdata, tot_data_sent, this_ldata);
111
112 SSVAL(req->outbuf,smb_vwv0,lparam);
113 SSVAL(req->outbuf,smb_vwv1,ldata);
114 SSVAL(req->outbuf,smb_vwv3,this_lparam);
115 SSVAL(req->outbuf,smb_vwv4,smb_offset(smb_buf(req->outbuf)+1,
116 req->outbuf));
117 SSVAL(req->outbuf,smb_vwv5,0);
118 SSVAL(req->outbuf,smb_vwv6,this_ldata);
119 SSVAL(req->outbuf,smb_vwv7,smb_offset(smb_buf(req->outbuf)+1+
120 this_lparam+align,
121 req->outbuf));
122 SSVAL(req->outbuf,smb_vwv8,0);
123 SSVAL(req->outbuf,smb_vwv9,0);
124
125 if (buffer_too_large) {
126 error_packet_set((char *)req->outbuf,
127 ERRDOS, ERRmoredata,
128 STATUS_BUFFER_OVERFLOW,
129 __LINE__, __FILE__);
130 }
131
132 show_msg((char *)req->outbuf);
133 if (!srv_send_smb(smbd_server_fd(),
134 (char *)req->outbuf,
135 IS_CONN_ENCRYPTED(conn)))
136 exit_server_cleanly("send_trans_reply: srv_send_smb failed.");
137
138 TALLOC_FREE(req->outbuf);
139
140 tot_data_sent = this_ldata;
141 tot_param_sent = this_lparam;
142
143 while (tot_data_sent < ldata || tot_param_sent < lparam)
144 {
145 this_lparam = MIN(lparam-tot_param_sent, max_send - 500); /* hack */
146 this_ldata = MIN(ldata -tot_data_sent, max_send - (500+this_lparam));
147
148 if(this_lparam < 0)
149 this_lparam = 0;
150
151 if(this_ldata < 0)
152 this_ldata = 0;
153
154 align = (this_lparam%4);
155
156 reply_outbuf(req, 10, 1+this_ldata+this_lparam+align);
157
158 copy_trans_params_and_data((char *)req->outbuf, align,
159 rparam, tot_param_sent, this_lparam,
160 rdata, tot_data_sent, this_ldata);
161
162 SSVAL(req->outbuf,smb_vwv3,this_lparam);
163 SSVAL(req->outbuf,smb_vwv4,smb_offset(smb_buf(req->outbuf)+1,
164 req->outbuf));
165 SSVAL(req->outbuf,smb_vwv5,tot_param_sent);
166 SSVAL(req->outbuf,smb_vwv6,this_ldata);
167 SSVAL(req->outbuf,smb_vwv7,smb_offset(smb_buf(req->outbuf)+1+
168 this_lparam+align,
169 req->outbuf));
170 SSVAL(req->outbuf,smb_vwv8,tot_data_sent);
171 SSVAL(req->outbuf,smb_vwv9,0);
172
173 if (buffer_too_large) {
174 error_packet_set((char *)req->outbuf,
175 ERRDOS, ERRmoredata,
176 STATUS_BUFFER_OVERFLOW,
177 __LINE__, __FILE__);
178 }
179
180 show_msg((char *)req->outbuf);
181 if (!srv_send_smb(smbd_server_fd(),
182 (char *)req->outbuf,
183 IS_CONN_ENCRYPTED(conn)))
184 exit_server_cleanly("send_trans_reply: srv_send_smb failed.");
185
186 tot_data_sent += this_ldata;
187 tot_param_sent += this_lparam;
188 TALLOC_FREE(req->outbuf);
189 }
190}
191
192/****************************************************************************
193 Start the first part of an RPC reply which began with an SMBtrans request.
194****************************************************************************/
195
196static void api_rpc_trans_reply(connection_struct *conn, struct smb_request *req, smb_np_struct *p)
197{
198 bool is_data_outstanding;
199 char *rdata = (char *)SMB_MALLOC(p->max_trans_reply);
200 int data_len;
201
202 if(rdata == NULL) {
203 DEBUG(0,("api_rpc_trans_reply: malloc fail.\n"));
204 reply_nterror(req, NT_STATUS_NO_MEMORY);
205 return;
206 }
207
208 if((data_len = read_from_pipe( p, rdata, p->max_trans_reply,
209 &is_data_outstanding)) < 0) {
210 SAFE_FREE(rdata);
211 api_no_reply(conn,req);
212 return;
213 }
214
215 send_trans_reply(conn, req, NULL, 0, rdata, data_len, is_data_outstanding);
216 SAFE_FREE(rdata);
217 return;
218}
219
220/****************************************************************************
221 WaitNamedPipeHandleState
222****************************************************************************/
223
224static void api_WNPHS(connection_struct *conn, struct smb_request *req, smb_np_struct *p,
225 char *param, int param_len)
226{
227 uint16 priority;
228
229 if (!param || param_len < 2) {
230 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
231 return;
232 }
233
234 priority = SVAL(param,0);
235 DEBUG(4,("WaitNamedPipeHandleState priority %x\n", priority));
236
237 if (wait_rpc_pipe_hnd_state(p, priority)) {
238 /* now send the reply */
239 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
240 return;
241 }
242 api_no_reply(conn,req);
243}
244
245
246/****************************************************************************
247 SetNamedPipeHandleState
248****************************************************************************/
249
250static void api_SNPHS(connection_struct *conn, struct smb_request *req, smb_np_struct *p,
251 char *param, int param_len)
252{
253 uint16 id;
254
255 if (!param || param_len < 2) {
256 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
257 return;
258 }
259
260 id = SVAL(param,0);
261 DEBUG(4,("SetNamedPipeHandleState to code %x\n", id));
262
263 if (set_rpc_pipe_hnd_state(p, id)) {
264 /* now send the reply */
265 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
266 return;
267 }
268 api_no_reply(conn,req);
269}
270
271
272/****************************************************************************
273 When no reply is generated, indicate unsupported.
274 ****************************************************************************/
275
276static void api_no_reply(connection_struct *conn, struct smb_request *req)
277{
278 char rparam[4];
279
280 /* unsupported */
281 SSVAL(rparam,0,NERR_notsupported);
282 SSVAL(rparam,2,0); /* converter word */
283
284 DEBUG(3,("Unsupported API fd command\n"));
285
286 /* now send the reply */
287 send_trans_reply(conn, req, rparam, 4, NULL, 0, False);
288
289 return;
290}
291
292/****************************************************************************
293 Handle remote api calls delivered to a named pipe already opened.
294 ****************************************************************************/
295
296static void api_fd_reply(connection_struct *conn, uint16 vuid,
297 struct smb_request *req,
298 uint16 *setup, char *data, char *params,
299 int suwcnt, int tdscnt, int tpscnt,
300 int mdrcnt, int mprcnt)
301{
302 bool reply = False;
303 smb_np_struct *p = NULL;
304 int pnum;
305 int subcommand;
306
307 DEBUG(5,("api_fd_reply\n"));
308
309 /* First find out the name of this file. */
310 if (suwcnt != 2) {
311 DEBUG(0,("Unexpected named pipe transaction.\n"));
312 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
313 return;
314 }
315
316 /* Get the file handle and hence the file name. */
317 /*
318 * NB. The setup array has already been transformed
319 * via SVAL and so is in gost byte order.
320 */
321 pnum = ((int)setup[1]) & 0xFFFF;
322 subcommand = ((int)setup[0]) & 0xFFFF;
323
324 if(!(p = get_rpc_pipe(pnum))) {
325 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
326 /* Win9x does this call with a unicode pipe name, not a pnum. */
327 /* Just return success for now... */
328 DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
329 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
330 return;
331 }
332
333 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
334 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
335 return;
336 }
337
338 if (vuid != p->vuid) {
339 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
340 "expected %d\n", pnum, vuid, p->vuid));
341 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
342 return;
343 }
344
345 DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n", subcommand, p->name, pnum));
346
347 /* record maximum data length that can be transmitted in an SMBtrans */
348 p->max_trans_reply = mdrcnt;
349
350 DEBUG(10,("api_fd_reply: p:%p max_trans_reply: %d\n", p, p->max_trans_reply));
351
352 switch (subcommand) {
353 case TRANSACT_DCERPCCMD:
354 /* dce/rpc command */
355 reply = write_to_pipe(p, data, tdscnt);
356 if (!reply) {
357 api_no_reply(conn, req);
358 return;
359 }
360 api_rpc_trans_reply(conn, req, p);
361 break;
362 case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
363 /* Wait Named Pipe Handle state */
364 api_WNPHS(conn, req, p, params, tpscnt);
365 break;
366 case TRANSACT_SETNAMEDPIPEHANDLESTATE:
367 /* Set Named Pipe Handle state */
368 api_SNPHS(conn, req, p, params, tpscnt);
369 break;
370 default:
371 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
372 return;
373 }
374}
375
376/****************************************************************************
377 Handle named pipe commands.
378****************************************************************************/
379
380static void named_pipe(connection_struct *conn, uint16 vuid,
381 struct smb_request *req,
382 const char *name, uint16 *setup,
383 char *data, char *params,
384 int suwcnt, int tdscnt,int tpscnt,
385 int msrcnt, int mdrcnt, int mprcnt)
386{
387 DEBUG(3,("named pipe command on <%s> name\n", name));
388
389 if (strequal(name,"LANMAN")) {
390 api_reply(conn, vuid, req,
391 data, params,
392 tdscnt, tpscnt,
393 mdrcnt, mprcnt);
394 return;
395 }
396
397 if (strequal(name,"WKSSVC") ||
398 strequal(name,"SRVSVC") ||
399 strequal(name,"WINREG") ||
400 strequal(name,"SAMR") ||
401 strequal(name,"LSARPC")) {
402
403 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
404
405 api_fd_reply(conn, vuid, req,
406 setup, data, params,
407 suwcnt, tdscnt, tpscnt,
408 mdrcnt, mprcnt);
409 return;
410 }
411
412 if (strlen(name) < 1) {
413 api_fd_reply(conn, vuid, req,
414 setup, data,
415 params, suwcnt, tdscnt,
416 tpscnt, mdrcnt, mprcnt);
417 return;
418 }
419
420 if (setup)
421 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
422 (int)setup[0],(int)setup[1]));
423
424 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
425 return;
426}
427
428static void handle_trans(connection_struct *conn, struct smb_request *req,
429 struct trans_state *state)
430{
431 char *local_machine_name;
432 int name_offset = 0;
433
434 DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
435 state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
436 (unsigned int)state->setup_count));
437
438 /*
439 * WinCE wierdness....
440 */
441
442 local_machine_name = talloc_asprintf(state, "\\%s\\",
443 get_local_machine_name());
444
445 if (local_machine_name == NULL) {
446 reply_nterror(req, NT_STATUS_NO_MEMORY);
447 return;
448 }
449
450 if (strnequal(state->name, local_machine_name,
451 strlen(local_machine_name))) {
452 name_offset = strlen(local_machine_name)-1;
453 }
454
455 if (!strnequal(&state->name[name_offset], "\\PIPE",
456 strlen("\\PIPE"))) {
457 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
458 return;
459 }
460
461 name_offset += strlen("\\PIPE");
462
463 /* Win9x weirdness. When talking to a unicode server Win9x
464 only sends \PIPE instead of \PIPE\ */
465
466 if (state->name[name_offset] == '\\')
467 name_offset++;
468
469 DEBUG(5,("calling named_pipe\n"));
470 named_pipe(conn, state->vuid, req,
471 state->name+name_offset,
472 state->setup,state->data,
473 state->param,
474 state->setup_count,state->total_data,
475 state->total_param,
476 state->max_setup_return,
477 state->max_data_return,
478 state->max_param_return);
479
480 if (state->close_on_completion) {
481 close_cnum(conn,state->vuid);
482 req->conn = NULL;
483 }
484
485 return;
486}
487
488/****************************************************************************
489 Reply to a SMBtrans.
490 ****************************************************************************/
491
492void reply_trans(struct smb_request *req)
493{
494 connection_struct *conn = req->conn;
495 unsigned int dsoff;
496 unsigned int dscnt;
497 unsigned int psoff;
498 unsigned int pscnt;
499 struct trans_state *state;
500 NTSTATUS result;
501 unsigned int size;
502 unsigned int av_size;
503
504 START_PROFILE(SMBtrans);
505
506 if (req->wct < 14) {
507 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
508 END_PROFILE(SMBtrans);
509 return;
510 }
511
512 size = smb_len(req->inbuf) + 4;
513 av_size = smb_len(req->inbuf);
514 dsoff = SVAL(req->inbuf, smb_dsoff);
515 dscnt = SVAL(req->inbuf, smb_dscnt);
516 psoff = SVAL(req->inbuf, smb_psoff);
517 pscnt = SVAL(req->inbuf, smb_pscnt);
518
519 result = allow_new_trans(conn->pending_trans, req->mid);
520 if (!NT_STATUS_IS_OK(result)) {
521 DEBUG(2, ("Got invalid trans request: %s\n",
522 nt_errstr(result)));
523 reply_nterror(req, result);
524 END_PROFILE(SMBtrans);
525 return;
526 }
527
528 if ((state = TALLOC_P(conn->mem_ctx, struct trans_state)) == NULL) {
529 DEBUG(0, ("talloc failed\n"));
530 reply_nterror(req, NT_STATUS_NO_MEMORY);
531 END_PROFILE(SMBtrans);
532 return;
533 }
534
535 state->cmd = SMBtrans;
536
537 state->mid = req->mid;
538 state->vuid = req->vuid;
539 state->setup_count = CVAL(req->inbuf, smb_suwcnt);
540 state->setup = NULL;
541 state->total_param = SVAL(req->inbuf, smb_tpscnt);
542 state->param = NULL;
543 state->total_data = SVAL(req->inbuf, smb_tdscnt);
544 state->data = NULL;
545 state->max_param_return = SVAL(req->inbuf, smb_mprcnt);
546 state->max_data_return = SVAL(req->inbuf, smb_mdrcnt);
547 state->max_setup_return = CVAL(req->inbuf, smb_msrcnt);
548 state->close_on_completion = BITSETW(req->inbuf+smb_vwv5,0);
549 state->one_way = BITSETW(req->inbuf+smb_vwv5,1);
550
551 srvstr_pull_buf_talloc(state, req->inbuf, req->flags2, &state->name,
552 smb_buf(req->inbuf), STR_TERMINATE);
553
554 if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
555 !state->name)
556 goto bad_param;
557
558 if (state->total_data) {
559 /* Can't use talloc here, the core routines do realloc on the
560 * params and data. Out of paranoia, 100 bytes too many. */
561 state->data = (char *)SMB_MALLOC(state->total_data+100);
562 if (state->data == NULL) {
563 DEBUG(0,("reply_trans: data malloc fail for %u "
564 "bytes !\n", (unsigned int)state->total_data));
565 TALLOC_FREE(state);
566 reply_nterror(req, NT_STATUS_NO_MEMORY);
567 END_PROFILE(SMBtrans);
568 return;
569 }
570 /* null-terminate the slack space */
571 memset(&state->data[state->total_data], 0, 100);
572
573 if (dscnt > state->total_data ||
574 dsoff+dscnt < dsoff) {
575 goto bad_param;
576 }
577
578 if (dsoff > av_size ||
579 dscnt > av_size ||
580 dsoff+dscnt > av_size) {
581 goto bad_param;
582 }
583
584 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
585 }
586
587 if (state->total_param) {
588 /* Can't use talloc here, the core routines do realloc on the
589 * params and data. Out of paranoia, 100 bytes too many */
590 state->param = (char *)SMB_MALLOC(state->total_param+100);
591 if (state->param == NULL) {
592 DEBUG(0,("reply_trans: param malloc fail for %u "
593 "bytes !\n", (unsigned int)state->total_param));
594 SAFE_FREE(state->data);
595 TALLOC_FREE(state);
596 reply_nterror(req, NT_STATUS_NO_MEMORY);
597 END_PROFILE(SMBtrans);
598 return;
599 }
600 /* null-terminate the slack space */
601 memset(&state->param[state->total_param], 0, 100);
602
603 if (pscnt > state->total_param ||
604 psoff+pscnt < psoff) {
605 goto bad_param;
606 }
607
608 if (psoff > av_size ||
609 pscnt > av_size ||
610 psoff+pscnt > av_size) {
611 goto bad_param;
612 }
613
614 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
615 }
616
617 state->received_data = dscnt;
618 state->received_param = pscnt;
619
620 if (state->setup_count) {
621 unsigned int i;
622 if((state->setup = TALLOC_ARRAY(
623 state, uint16, state->setup_count)) == NULL) {
624 DEBUG(0,("reply_trans: setup malloc fail for %u "
625 "bytes !\n", (unsigned int)
626 (state->setup_count * sizeof(uint16))));
627 SAFE_FREE(state->data);
628 SAFE_FREE(state->param);
629 TALLOC_FREE(state);
630 reply_nterror(req, NT_STATUS_NO_MEMORY);
631 END_PROFILE(SMBtrans);
632 return;
633 }
634 if (req->inbuf+smb_vwv14+(state->setup_count*SIZEOFWORD) >
635 req->inbuf + size)
636 goto bad_param;
637 if ((smb_vwv14+(state->setup_count*SIZEOFWORD) < smb_vwv14) ||
638 (smb_vwv14+(state->setup_count*SIZEOFWORD) <
639 (state->setup_count*SIZEOFWORD)))
640 goto bad_param;
641
642 for (i=0;i<state->setup_count;i++)
643 state->setup[i] = SVAL(req->inbuf,
644 smb_vwv14+i*SIZEOFWORD);
645 }
646
647 state->received_param = pscnt;
648
649 if ((state->received_param != state->total_param) ||
650 (state->received_data != state->total_data)) {
651 DLIST_ADD(conn->pending_trans, state);
652
653 /* We need to send an interim response then receive the rest
654 of the parameter/data bytes */
655 reply_outbuf(req, 0, 0);
656 show_msg((char *)req->outbuf);
657 END_PROFILE(SMBtrans);
658 return;
659 }
660
661 handle_trans(conn, req, state);
662
663 SAFE_FREE(state->data);
664 SAFE_FREE(state->param);
665 TALLOC_FREE(state);
666
667 END_PROFILE(SMBtrans);
668 return;
669
670 bad_param:
671
672 DEBUG(0,("reply_trans: invalid trans parameters\n"));
673 SAFE_FREE(state->data);
674 SAFE_FREE(state->param);
675 TALLOC_FREE(state);
676 END_PROFILE(SMBtrans);
677 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
678 return;
679}
680
681/****************************************************************************
682 Reply to a secondary SMBtrans.
683 ****************************************************************************/
684
685void reply_transs(struct smb_request *req)
686{
687 connection_struct *conn = req->conn;
688 unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
689 struct trans_state *state;
690 unsigned int av_size;
691
692 START_PROFILE(SMBtranss);
693
694 show_msg((char *)req->inbuf);
695
696 if (req->wct < 8) {
697 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
698 END_PROFILE(SMBtranss);
699 return;
700 }
701
702 for (state = conn->pending_trans; state != NULL;
703 state = state->next) {
704 if (state->mid == req->mid) {
705 break;
706 }
707 }
708
709 if ((state == NULL) || (state->cmd != SMBtrans)) {
710 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
711 END_PROFILE(SMBtranss);
712 return;
713 }
714
715 /* Revise total_params and total_data in case they have changed
716 * downwards */
717
718 if (SVAL(req->inbuf, smb_vwv0) < state->total_param)
719 state->total_param = SVAL(req->inbuf,smb_vwv0);
720 if (SVAL(req->inbuf, smb_vwv1) < state->total_data)
721 state->total_data = SVAL(req->inbuf,smb_vwv1);
722
723 av_size = smb_len(req->inbuf);
724
725 pcnt = SVAL(req->inbuf, smb_spscnt);
726 poff = SVAL(req->inbuf, smb_spsoff);
727 pdisp = SVAL(req->inbuf, smb_spsdisp);
728
729 dcnt = SVAL(req->inbuf, smb_sdscnt);
730 doff = SVAL(req->inbuf, smb_sdsoff);
731 ddisp = SVAL(req->inbuf, smb_sdsdisp);
732
733 state->received_param += pcnt;
734 state->received_data += dcnt;
735
736 if ((state->received_data > state->total_data) ||
737 (state->received_param > state->total_param))
738 goto bad_param;
739
740 if (pcnt) {
741 if (pdisp > state->total_param ||
742 pcnt > state->total_param ||
743 pdisp+pcnt > state->total_param ||
744 pdisp+pcnt < pdisp) {
745 goto bad_param;
746 }
747
748 if (poff > av_size ||
749 pcnt > av_size ||
750 poff+pcnt > av_size ||
751 poff+pcnt < poff) {
752 goto bad_param;
753 }
754
755 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,
756 pcnt);
757 }
758
759 if (dcnt) {
760 if (ddisp > state->total_data ||
761 dcnt > state->total_data ||
762 ddisp+dcnt > state->total_data ||
763 ddisp+dcnt < ddisp) {
764 goto bad_param;
765 }
766
767 if (ddisp > av_size ||
768 dcnt > av_size ||
769 ddisp+dcnt > av_size ||
770 ddisp+dcnt < ddisp) {
771 goto bad_param;
772 }
773
774 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,
775 dcnt);
776 }
777
778 if ((state->received_param < state->total_param) ||
779 (state->received_data < state->total_data)) {
780 END_PROFILE(SMBtranss);
781 return;
782 }
783
784 /*
785 * construct_reply_common will copy smb_com from inbuf to
786 * outbuf. SMBtranss is wrong here.
787 */
788 SCVAL(req->inbuf,smb_com,SMBtrans);
789
790 handle_trans(conn, req, state);
791
792 DLIST_REMOVE(conn->pending_trans, state);
793 SAFE_FREE(state->data);
794 SAFE_FREE(state->param);
795 TALLOC_FREE(state);
796
797 END_PROFILE(SMBtranss);
798 return;
799
800 bad_param:
801
802 DEBUG(0,("reply_transs: invalid trans parameters\n"));
803 DLIST_REMOVE(conn->pending_trans, state);
804 SAFE_FREE(state->data);
805 SAFE_FREE(state->param);
806 TALLOC_FREE(state);
807 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
808 END_PROFILE(SMBtranss);
809 return;
810}
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