source: trunk/samba/source/smbd/ipc.c@ 77

Last change on this file since 77 was 77, checked in by Paul Smedley, 18 years ago

Update trunk to 3.2.0pre1
File size: 22.0 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(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(struct smb_request *req,
85 char *rparam, int rparam_len,
86 char *rdata, int rdata_len,
87 BOOL buffer_too_large)
88{
89 int this_ldata,this_lparam;
90 int tot_data_sent = 0;
91 int tot_param_sent = 0;
92 int align;
93
94 int ldata = rdata ? rdata_len : 0;
95 int lparam = rparam ? rparam_len : 0;
96
97 if (buffer_too_large)
98 DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
99
100 this_lparam = MIN(lparam,max_send - 500); /* hack */
101 this_ldata = MIN(ldata,max_send - (500+this_lparam));
102
103 align = ((this_lparam)%4);
104
105 reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
106
107 copy_trans_params_and_data((char *)req->outbuf, align,
108 rparam, tot_param_sent, this_lparam,
109 rdata, tot_data_sent, this_ldata);
110
111 SSVAL(req->outbuf,smb_vwv0,lparam);
112 SSVAL(req->outbuf,smb_vwv1,ldata);
113 SSVAL(req->outbuf,smb_vwv3,this_lparam);
114 SSVAL(req->outbuf,smb_vwv4,smb_offset(smb_buf(req->outbuf)+1,
115 req->outbuf));
116 SSVAL(req->outbuf,smb_vwv5,0);
117 SSVAL(req->outbuf,smb_vwv6,this_ldata);
118 SSVAL(req->outbuf,smb_vwv7,smb_offset(smb_buf(req->outbuf)+1+
119 this_lparam+align,
120 req->outbuf));
121 SSVAL(req->outbuf,smb_vwv8,0);
122 SSVAL(req->outbuf,smb_vwv9,0);
123
124 if (buffer_too_large) {
125 error_packet_set((char *)req->outbuf,
126 ERRDOS, ERRmoredata,
127 STATUS_BUFFER_OVERFLOW,
128 __LINE__, __FILE__);
129 }
130
131 show_msg((char *)req->outbuf);
132 if (!send_smb(smbd_server_fd(),(char *)req->outbuf))
133 exit_server_cleanly("send_trans_reply: send_smb failed.");
134
135 TALLOC_FREE(req->outbuf);
136
137 tot_data_sent = this_ldata;
138 tot_param_sent = this_lparam;
139
140 while (tot_data_sent < ldata || tot_param_sent < lparam)
141 {
142 this_lparam = MIN(lparam-tot_param_sent, max_send - 500); /* hack */
143 this_ldata = MIN(ldata -tot_data_sent, max_send - (500+this_lparam));
144
145 if(this_lparam < 0)
146 this_lparam = 0;
147
148 if(this_ldata < 0)
149 this_ldata = 0;
150
151 align = (this_lparam%4);
152
153 reply_outbuf(req, 10, 1+this_ldata+this_lparam+align);
154
155 copy_trans_params_and_data((char *)req->outbuf, align,
156 rparam, tot_param_sent, this_lparam,
157 rdata, tot_data_sent, this_ldata);
158
159 SSVAL(req->outbuf,smb_vwv3,this_lparam);
160 SSVAL(req->outbuf,smb_vwv4,smb_offset(smb_buf(req->outbuf)+1,
161 req->outbuf));
162 SSVAL(req->outbuf,smb_vwv5,tot_param_sent);
163 SSVAL(req->outbuf,smb_vwv6,this_ldata);
164 SSVAL(req->outbuf,smb_vwv7,smb_offset(smb_buf(req->outbuf)+1+
165 this_lparam+align,
166 req->outbuf));
167 SSVAL(req->outbuf,smb_vwv8,tot_data_sent);
168 SSVAL(req->outbuf,smb_vwv9,0);
169
170 if (buffer_too_large) {
171 error_packet_set((char *)req->outbuf,
172 ERRDOS, ERRmoredata,
173 STATUS_BUFFER_OVERFLOW,
174 __LINE__, __FILE__);
175 }
176
177 show_msg((char *)req->outbuf);
178 if (!send_smb(smbd_server_fd(), (char *)req->outbuf))
179 exit_server_cleanly("send_trans_reply: send_smb failed.");
180
181 tot_data_sent += this_ldata;
182 tot_param_sent += this_lparam;
183 TALLOC_FREE(req->outbuf);
184 }
185}
186
187/****************************************************************************
188 Start the first part of an RPC reply which began with an SMBtrans request.
189****************************************************************************/
190
191static void api_rpc_trans_reply(struct smb_request *req, smb_np_struct *p)
192{
193 BOOL is_data_outstanding;
194 char *rdata = (char *)SMB_MALLOC(p->max_trans_reply);
195 int data_len;
196
197 if(rdata == NULL) {
198 DEBUG(0,("api_rpc_trans_reply: malloc fail.\n"));
199 reply_nterror(req, NT_STATUS_NO_MEMORY);
200 return;
201 }
202
203 if((data_len = read_from_pipe( p, rdata, p->max_trans_reply,
204 &is_data_outstanding)) < 0) {
205 SAFE_FREE(rdata);
206 api_no_reply(req);
207 return;
208 }
209
210 send_trans_reply(req, NULL, 0, rdata, data_len, is_data_outstanding);
211 SAFE_FREE(rdata);
212 return;
213}
214
215/****************************************************************************
216 WaitNamedPipeHandleState
217****************************************************************************/
218
219static void api_WNPHS(struct smb_request *req, smb_np_struct *p,
220 char *param, int param_len)
221{
222 uint16 priority;
223
224 if (!param || param_len < 2) {
225 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
226 return;
227 }
228
229 priority = SVAL(param,0);
230 DEBUG(4,("WaitNamedPipeHandleState priority %x\n", priority));
231
232 if (wait_rpc_pipe_hnd_state(p, priority)) {
233 /* now send the reply */
234 send_trans_reply(req, NULL, 0, NULL, 0, False);
235 return;
236 }
237 api_no_reply(req);
238}
239
240
241/****************************************************************************
242 SetNamedPipeHandleState
243****************************************************************************/
244
245static void api_SNPHS(struct smb_request *req, smb_np_struct *p,
246 char *param, int param_len)
247{
248 uint16 id;
249
250 if (!param || param_len < 2) {
251 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
252 return;
253 }
254
255 id = SVAL(param,0);
256 DEBUG(4,("SetNamedPipeHandleState to code %x\n", id));
257
258 if (set_rpc_pipe_hnd_state(p, id)) {
259 /* now send the reply */
260 send_trans_reply(req, NULL, 0, NULL, 0, False);
261 return;
262 }
263 api_no_reply(req);
264}
265
266
267/****************************************************************************
268 When no reply is generated, indicate unsupported.
269 ****************************************************************************/
270
271static void api_no_reply(struct smb_request *req)
272{
273 char rparam[4];
274
275 /* unsupported */
276 SSVAL(rparam,0,NERR_notsupported);
277 SSVAL(rparam,2,0); /* converter word */
278
279 DEBUG(3,("Unsupported API fd command\n"));
280
281 /* now send the reply */
282 send_trans_reply(req, rparam, 4, NULL, 0, False);
283
284 return;
285}
286
287/****************************************************************************
288 Handle remote api calls delivered to a named pipe already opened.
289 ****************************************************************************/
290
291static void api_fd_reply(connection_struct *conn, uint16 vuid,
292 struct smb_request *req,
293 uint16 *setup, char *data, char *params,
294 int suwcnt, int tdscnt, int tpscnt,
295 int mdrcnt, int mprcnt)
296{
297 BOOL reply = False;
298 smb_np_struct *p = NULL;
299 int pnum;
300 int subcommand;
301
302 DEBUG(5,("api_fd_reply\n"));
303
304 /* First find out the name of this file. */
305 if (suwcnt != 2) {
306 DEBUG(0,("Unexpected named pipe transaction.\n"));
307 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
308 return;
309 }
310
311 /* Get the file handle and hence the file name. */
312 /*
313 * NB. The setup array has already been transformed
314 * via SVAL and so is in gost byte order.
315 */
316 pnum = ((int)setup[1]) & 0xFFFF;
317 subcommand = ((int)setup[0]) & 0xFFFF;
318
319 if(!(p = get_rpc_pipe(pnum))) {
320 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
321 /* Win9x does this call with a unicode pipe name, not a pnum. */
322 /* Just return success for now... */
323 DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
324 send_trans_reply(req, NULL, 0, NULL, 0, False);
325 return;
326 }
327
328 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
329 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
330 return;
331 }
332
333 if (vuid != p->vuid) {
334 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
335 "expected %d\n", pnum, vuid, p->vuid));
336 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
337 return;
338 }
339
340 DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n", subcommand, p->name, pnum));
341
342 /* record maximum data length that can be transmitted in an SMBtrans */
343 p->max_trans_reply = mdrcnt;
344
345 DEBUG(10,("api_fd_reply: p:%p max_trans_reply: %d\n", p, p->max_trans_reply));
346
347 switch (subcommand) {
348 case TRANSACT_DCERPCCMD:
349 /* dce/rpc command */
350 reply = write_to_pipe(p, data, tdscnt);
351 if (!reply) {
352 api_no_reply(req);
353 return;
354 }
355 api_rpc_trans_reply(req, p);
356 break;
357 case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
358 /* Wait Named Pipe Handle state */
359 api_WNPHS(req, p, params, tpscnt);
360 break;
361 case TRANSACT_SETNAMEDPIPEHANDLESTATE:
362 /* Set Named Pipe Handle state */
363 api_SNPHS(req, p, params, tpscnt);
364 break;
365 default:
366 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
367 return;
368 }
369}
370
371/****************************************************************************
372 Handle named pipe commands.
373****************************************************************************/
374
375static void named_pipe(connection_struct *conn, uint16 vuid,
376 struct smb_request *req,
377 char *name, uint16 *setup,
378 char *data, char *params,
379 int suwcnt, int tdscnt,int tpscnt,
380 int msrcnt, int mdrcnt, int mprcnt)
381{
382 DEBUG(3,("named pipe command on <%s> name\n", name));
383
384 if (strequal(name,"LANMAN")) {
385 api_reply(conn, vuid, req,
386 data, params,
387 tdscnt, tpscnt,
388 mdrcnt, mprcnt);
389 return;
390 }
391
392 if (strequal(name,"WKSSVC") ||
393 strequal(name,"SRVSVC") ||
394 strequal(name,"WINREG") ||
395 strequal(name,"SAMR") ||
396 strequal(name,"LSARPC")) {
397
398 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
399
400 api_fd_reply(conn, vuid, req,
401 setup, data, params,
402 suwcnt, tdscnt, tpscnt,
403 mdrcnt, mprcnt);
404 return;
405 }
406
407 if (strlen(name) < 1) {
408 api_fd_reply(conn, vuid, req,
409 setup, data,
410 params, suwcnt, tdscnt,
411 tpscnt, mdrcnt, mprcnt);
412 return;
413 }
414
415 if (setup)
416 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
417 (int)setup[0],(int)setup[1]));
418
419 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
420 return;
421}
422
423static void handle_trans(connection_struct *conn, struct smb_request *req,
424 struct trans_state *state)
425{
426 char *local_machine_name;
427 int name_offset = 0;
428
429 DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
430 state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
431 (unsigned int)state->setup_count));
432
433 /*
434 * WinCE wierdness....
435 */
436
437 local_machine_name = talloc_asprintf(state, "\\%s\\",
438 get_local_machine_name());
439
440 if (local_machine_name == NULL) {
441 reply_nterror(req, NT_STATUS_NO_MEMORY);
442 return;
443 }
444
445 if (strnequal(state->name, local_machine_name,
446 strlen(local_machine_name))) {
447 name_offset = strlen(local_machine_name)-1;
448 }
449
450 if (!strnequal(&state->name[name_offset], "\\PIPE",
451 strlen("\\PIPE"))) {
452 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
453 return;
454 }
455
456 name_offset += strlen("\\PIPE");
457
458 /* Win9x weirdness. When talking to a unicode server Win9x
459 only sends \PIPE instead of \PIPE\ */
460
461 if (state->name[name_offset] == '\\')
462 name_offset++;
463
464 DEBUG(5,("calling named_pipe\n"));
465 named_pipe(conn, state->vuid, req,
466 state->name+name_offset,
467 state->setup,state->data,
468 state->param,
469 state->setup_count,state->total_data,
470 state->total_param,
471 state->max_setup_return,
472 state->max_data_return,
473 state->max_param_return);
474
475 if (state->close_on_completion)
476 close_cnum(conn,state->vuid);
477
478 return;
479}
480
481/****************************************************************************
482 Reply to a SMBtrans.
483 ****************************************************************************/
484
485void reply_trans(connection_struct *conn, struct smb_request *req)
486{
487 unsigned int dsoff;
488 unsigned int dscnt;
489 unsigned int psoff;
490 unsigned int pscnt;
491 struct trans_state *state;
492 NTSTATUS result;
493 int size;
494
495 START_PROFILE(SMBtrans);
496
497 if (req->wct < 14) {
498 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
499 END_PROFILE(SMBtrans);
500 return;
501 }
502
503 size = smb_len(req->inbuf) + 4;
504 dsoff = SVAL(req->inbuf, smb_dsoff);
505 dscnt = SVAL(req->inbuf, smb_dscnt);
506 psoff = SVAL(req->inbuf, smb_psoff);
507 pscnt = SVAL(req->inbuf, smb_pscnt);
508
509 result = allow_new_trans(conn->pending_trans, req->mid);
510 if (!NT_STATUS_IS_OK(result)) {
511 DEBUG(2, ("Got invalid trans request: %s\n",
512 nt_errstr(result)));
513 reply_nterror(req, result);
514 END_PROFILE(SMBtrans);
515 return;
516 }
517
518 if ((state = TALLOC_P(conn->mem_ctx, struct trans_state)) == NULL) {
519 DEBUG(0, ("talloc failed\n"));
520 reply_nterror(req, NT_STATUS_NO_MEMORY);
521 END_PROFILE(SMBtrans);
522 return;
523 }
524
525 state->cmd = SMBtrans;
526
527 state->mid = req->mid;
528 state->vuid = req->vuid;
529 state->setup_count = CVAL(req->inbuf, smb_suwcnt);
530 state->setup = NULL;
531 state->total_param = SVAL(req->inbuf, smb_tpscnt);
532 state->param = NULL;
533 state->total_data = SVAL(req->inbuf, smb_tdscnt);
534 state->data = NULL;
535 state->max_param_return = SVAL(req->inbuf, smb_mprcnt);
536 state->max_data_return = SVAL(req->inbuf, smb_mdrcnt);
537 state->max_setup_return = CVAL(req->inbuf, smb_msrcnt);
538 state->close_on_completion = BITSETW(req->inbuf+smb_vwv5,0);
539 state->one_way = BITSETW(req->inbuf+smb_vwv5,1);
540
541 memset(state->name, '\0',sizeof(state->name));
542 srvstr_pull_buf(req->inbuf, req->flags2, state->name,
543 smb_buf(req->inbuf), sizeof(state->name),
544 STR_TERMINATE);
545
546 if ((dscnt > state->total_data) || (pscnt > state->total_param))
547 goto bad_param;
548
549 if (state->total_data) {
550 /* Can't use talloc here, the core routines do realloc on the
551 * params and data. Out of paranoia, 100 bytes too many. */
552 state->data = (char *)SMB_MALLOC(state->total_data+100);
553 if (state->data == NULL) {
554 DEBUG(0,("reply_trans: data malloc fail for %u "
555 "bytes !\n", (unsigned int)state->total_data));
556 TALLOC_FREE(state);
557 reply_nterror(req, NT_STATUS_NO_MEMORY);
558 END_PROFILE(SMBtrans);
559 return;
560 }
561 /* null-terminate the slack space */
562 memset(&state->data[state->total_data], 0, 100);
563 if ((dsoff+dscnt < dsoff) || (dsoff+dscnt < dscnt))
564 goto bad_param;
565 if ((smb_base(req->inbuf)+dsoff+dscnt
566 > (char *)req->inbuf + size) ||
567 (smb_base(req->inbuf)+dsoff+dscnt < smb_base(req->inbuf)))
568 goto bad_param;
569
570 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
571 }
572
573 if (state->total_param) {
574 /* Can't use talloc here, the core routines do realloc on the
575 * params and data. Out of paranoia, 100 bytes too many */
576 state->param = (char *)SMB_MALLOC(state->total_param+100);
577 if (state->param == NULL) {
578 DEBUG(0,("reply_trans: param malloc fail for %u "
579 "bytes !\n", (unsigned int)state->total_param));
580 SAFE_FREE(state->data);
581 TALLOC_FREE(state);
582 reply_nterror(req, NT_STATUS_NO_MEMORY);
583 END_PROFILE(SMBtrans);
584 return;
585 }
586 /* null-terminate the slack space */
587 memset(&state->param[state->total_param], 0, 100);
588 if ((psoff+pscnt < psoff) || (psoff+pscnt < pscnt))
589 goto bad_param;
590 if ((smb_base(req->inbuf)+psoff+pscnt
591 > (char *)req->inbuf + size) ||
592 (smb_base(req->inbuf)+psoff+pscnt < smb_base(req->inbuf)))
593 goto bad_param;
594
595 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
596 }
597
598 state->received_data = dscnt;
599 state->received_param = pscnt;
600
601 if (state->setup_count) {
602 unsigned int i;
603 if((state->setup = TALLOC_ARRAY(
604 state, uint16, state->setup_count)) == NULL) {
605 DEBUG(0,("reply_trans: setup malloc fail for %u "
606 "bytes !\n", (unsigned int)
607 (state->setup_count * sizeof(uint16))));
608 SAFE_FREE(state->data);
609 SAFE_FREE(state->param);
610 TALLOC_FREE(state);
611 reply_nterror(req, NT_STATUS_NO_MEMORY);
612 END_PROFILE(SMBtrans);
613 return;
614 }
615 if (req->inbuf+smb_vwv14+(state->setup_count*SIZEOFWORD) >
616 req->inbuf + size)
617 goto bad_param;
618 if ((smb_vwv14+(state->setup_count*SIZEOFWORD) < smb_vwv14) ||
619 (smb_vwv14+(state->setup_count*SIZEOFWORD) <
620 (state->setup_count*SIZEOFWORD)))
621 goto bad_param;
622
623 for (i=0;i<state->setup_count;i++)
624 state->setup[i] = SVAL(req->inbuf,
625 smb_vwv14+i*SIZEOFWORD);
626 }
627
628 state->received_param = pscnt;
629
630 if ((state->received_param != state->total_param) ||
631 (state->received_data != state->total_data)) {
632 DLIST_ADD(conn->pending_trans, state);
633
634 /* We need to send an interim response then receive the rest
635 of the parameter/data bytes */
636 reply_outbuf(req, 0, 0);
637 show_msg((char *)req->outbuf);
638 END_PROFILE(SMBtrans);
639 return;
640 }
641
642 handle_trans(conn, req, state);
643
644 SAFE_FREE(state->data);
645 SAFE_FREE(state->param);
646 TALLOC_FREE(state);
647
648 END_PROFILE(SMBtrans);
649 return;
650
651 bad_param:
652
653 DEBUG(0,("reply_trans: invalid trans parameters\n"));
654 SAFE_FREE(state->data);
655 SAFE_FREE(state->param);
656 TALLOC_FREE(state);
657 END_PROFILE(SMBtrans);
658 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
659 return;
660}
661
662/****************************************************************************
663 Reply to a secondary SMBtrans.
664 ****************************************************************************/
665
666void reply_transs(connection_struct *conn, struct smb_request *req)
667{
668 unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
669 struct trans_state *state;
670 int size;
671
672 START_PROFILE(SMBtranss);
673
674 show_msg((char *)req->inbuf);
675
676 if (req->wct < 8) {
677 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
678 END_PROFILE(SMBtranss);
679 return;
680 }
681
682 for (state = conn->pending_trans; state != NULL;
683 state = state->next) {
684 if (state->mid == req->mid) {
685 break;
686 }
687 }
688
689 if ((state == NULL) || (state->cmd != SMBtrans)) {
690 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
691 END_PROFILE(SMBtranss);
692 return;
693 }
694
695 /* Revise total_params and total_data in case they have changed
696 * downwards */
697
698 if (SVAL(req->inbuf, smb_vwv0) < state->total_param)
699 state->total_param = SVAL(req->inbuf,smb_vwv0);
700 if (SVAL(req->inbuf, smb_vwv1) < state->total_data)
701 state->total_data = SVAL(req->inbuf,smb_vwv1);
702
703 size = smb_len(req->inbuf) + 4;
704
705 pcnt = SVAL(req->inbuf, smb_spscnt);
706 poff = SVAL(req->inbuf, smb_spsoff);
707 pdisp = SVAL(req->inbuf, smb_spsdisp);
708
709 dcnt = SVAL(req->inbuf, smb_sdscnt);
710 doff = SVAL(req->inbuf, smb_sdsoff);
711 ddisp = SVAL(req->inbuf, smb_sdsdisp);
712
713 state->received_param += pcnt;
714 state->received_data += dcnt;
715
716 if ((state->received_data > state->total_data) ||
717 (state->received_param > state->total_param))
718 goto bad_param;
719
720 if (pcnt) {
721 if (pdisp+pcnt > state->total_param)
722 goto bad_param;
723 if ((pdisp+pcnt < pdisp) || (pdisp+pcnt < pcnt))
724 goto bad_param;
725 if (pdisp > state->total_param)
726 goto bad_param;
727 if ((smb_base(req->inbuf) + poff + pcnt
728 > (char *)req->inbuf + size) ||
729 (smb_base(req->inbuf) + poff + pcnt
730 < smb_base(req->inbuf)))
731 goto bad_param;
732 if (state->param + pdisp < state->param)
733 goto bad_param;
734
735 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,
736 pcnt);
737 }
738
739 if (dcnt) {
740 if (ddisp+dcnt > state->total_data)
741 goto bad_param;
742 if ((ddisp+dcnt < ddisp) || (ddisp+dcnt < dcnt))
743 goto bad_param;
744 if (ddisp > state->total_data)
745 goto bad_param;
746 if ((smb_base(req->inbuf) + doff + dcnt
747 > (char *)req->inbuf + size) ||
748 (smb_base(req->inbuf) + doff + dcnt
749 < smb_base(req->inbuf)))
750 goto bad_param;
751 if (state->data + ddisp < state->data)
752 goto bad_param;
753
754 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,
755 dcnt);
756 }
757
758 if ((state->received_param < state->total_param) ||
759 (state->received_data < state->total_data)) {
760 END_PROFILE(SMBtranss);
761 return;
762 }
763
764 /* construct_reply_common has done us the favor to pre-fill the
765 * command field with SMBtranss which is wrong :-)
766 */
767 SCVAL(req->outbuf,smb_com,SMBtrans);
768
769 handle_trans(conn, req, state);
770
771 DLIST_REMOVE(conn->pending_trans, state);
772 SAFE_FREE(state->data);
773 SAFE_FREE(state->param);
774 TALLOC_FREE(state);
775
776 END_PROFILE(SMBtranss);
777 return;
778
779 bad_param:
780
781 DEBUG(0,("reply_transs: invalid trans parameters\n"));
782 DLIST_REMOVE(conn->pending_trans, state);
783 SAFE_FREE(state->data);
784 SAFE_FREE(state->param);
785 TALLOC_FREE(state);
786 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
787 END_PROFILE(SMBtranss);
788 return;
789}
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