summaryrefslogtreecommitdiff
path: root/source3/smbd/ipc.c
blob: d11c8c7cd51fecdf1779ed518865f825b4d779b0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
/* 
   Unix SMB/CIFS implementation.
   Inter-process communication and named pipe handling
   Copyright (C) Andrew Tridgell 1992-1998

   SMB Version handling
   Copyright (C) John H Terpstra 1995-1998

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
   */
/*
   This file handles the named pipe and mailslot calls
   in the SMBtrans protocol
   */

#include "includes.h"

extern int max_send;

#define NERR_notsupported 50

static void api_no_reply(connection_struct *conn, struct smb_request *req);

/*******************************************************************
 copies parameters and data, as needed, into the smb buffer

 *both* the data and params sections should be aligned.  this
 is fudged in the rpc pipes by 
 at present, only the data section is.  this may be a possible
 cause of some of the ipc problems being experienced.  lkcl26dec97

 ******************************************************************/

static void copy_trans_params_and_data(char *outbuf, int align,
				char *rparam, int param_offset, int param_len,
				char *rdata, int data_offset, int data_len)
{
	char *copy_into = smb_buf(outbuf);

	if(param_len < 0)
		param_len = 0;

	if(data_len < 0)
		data_len = 0;

	DEBUG(5,("copy_trans_params_and_data: params[%d..%d] data[%d..%d] (align %d)\n",
			param_offset, param_offset + param_len,
			data_offset , data_offset  + data_len,
			align));

	*copy_into = '\0';

	copy_into += 1;

	if (param_len)
		memcpy(copy_into, &rparam[param_offset], param_len);

	copy_into += param_len;
	if (align) {
		memset(copy_into, '\0', align);
	}

	copy_into += align;

	if (data_len )
		memcpy(copy_into, &rdata[data_offset], data_len);
}

/****************************************************************************
 Send a trans reply.
 ****************************************************************************/

void send_trans_reply(connection_struct *conn, const uint8_t *inbuf,
		      char *rparam, int rparam_len,
		      char *rdata, int rdata_len,
		      bool buffer_too_large)
{
	int this_ldata,this_lparam;
	int tot_data_sent = 0;
	int tot_param_sent = 0;
	int align;
	char *outbuf;

	int ldata  = rdata  ? rdata_len : 0;
	int lparam = rparam ? rparam_len : 0;

	if (buffer_too_large)
		DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));

	this_lparam = MIN(lparam,max_send - 500); /* hack */
	this_ldata  = MIN(ldata,max_send - (500+this_lparam));

	align = ((this_lparam)%4);

	if (!create_outbuf(talloc_tos(), (char *)inbuf, &outbuf,
			   10, 1+align+this_ldata+this_lparam)) {
		smb_panic("could not allocate outbuf");
	}

	copy_trans_params_and_data(outbuf, align,
				rparam, tot_param_sent, this_lparam,
				rdata, tot_data_sent, this_ldata);

	SSVAL(outbuf,smb_vwv0,lparam);
	SSVAL(outbuf,smb_vwv1,ldata);
	SSVAL(outbuf,smb_vwv3,this_lparam);
	SSVAL(outbuf,smb_vwv4,smb_offset(smb_buf(outbuf)+1,outbuf));
	SSVAL(outbuf,smb_vwv5,0);
	SSVAL(outbuf,smb_vwv6,this_ldata);
	SSVAL(outbuf,smb_vwv7,smb_offset(smb_buf(outbuf)+1+this_lparam+align,
					 outbuf));
	SSVAL(outbuf,smb_vwv8,0);
	SSVAL(outbuf,smb_vwv9,0);

	if (buffer_too_large) {
		error_packet_set((char *)outbuf, ERRDOS, ERRmoredata,
				 STATUS_BUFFER_OVERFLOW, __LINE__, __FILE__);
	}

	show_msg(outbuf);
	if (!srv_send_smb(smbd_server_fd(), (char *)outbuf,
			  IS_CONN_ENCRYPTED(conn))) {
		exit_server_cleanly("send_trans_reply: srv_send_smb failed.");
	}

	TALLOC_FREE(outbuf);

	tot_data_sent = this_ldata;
	tot_param_sent = this_lparam;

	while (tot_data_sent < ldata || tot_param_sent < lparam)
	{
		this_lparam = MIN(lparam-tot_param_sent,
				  max_send - 500); /* hack */
		this_ldata  = MIN(ldata -tot_data_sent,
				  max_send - (500+this_lparam));

		if(this_lparam < 0)
			this_lparam = 0;

		if(this_ldata < 0)
			this_ldata = 0;

		align = (this_lparam%4);

		if (!create_outbuf(talloc_tos(), (char *)inbuf, &outbuf,
				   10, 1+align+this_ldata+this_lparam)) {
			smb_panic("could not allocate outbuf");
		}

		copy_trans_params_and_data(outbuf, align,
					   rparam, tot_param_sent, this_lparam,
					   rdata, tot_data_sent, this_ldata);

		SSVAL(outbuf,smb_vwv3,this_lparam);
		SSVAL(outbuf,smb_vwv4,smb_offset(smb_buf(outbuf)+1,outbuf));
		SSVAL(outbuf,smb_vwv5,tot_param_sent);
		SSVAL(outbuf,smb_vwv6,this_ldata);
		SSVAL(outbuf,smb_vwv7,
		      smb_offset(smb_buf(outbuf)+1+this_lparam+align, outbuf));
		SSVAL(outbuf,smb_vwv8,tot_data_sent);
		SSVAL(outbuf,smb_vwv9,0);

		if (buffer_too_large) {
			error_packet_set(outbuf, ERRDOS, ERRmoredata,
					 STATUS_BUFFER_OVERFLOW,
					 __LINE__, __FILE__);
		}

		show_msg(outbuf);
		if (!srv_send_smb(smbd_server_fd(), outbuf,
				  IS_CONN_ENCRYPTED(conn)))
			exit_server_cleanly("send_trans_reply: srv_send_smb "
					    "failed.");

		tot_data_sent  += this_ldata;
		tot_param_sent += this_lparam;
		TALLOC_FREE(outbuf);
	}
}

/****************************************************************************
 Start the first part of an RPC reply which began with an SMBtrans request.
****************************************************************************/

static void api_rpc_trans_reply(connection_struct *conn,
				struct smb_request *req,
				files_struct *fsp,
				int max_trans_reply)
{
	bool is_data_outstanding;
	uint8_t *rdata = SMB_MALLOC_ARRAY(uint8_t, max_trans_reply);
	ssize_t data_len;
	NTSTATUS status;

	if(rdata == NULL) {
		DEBUG(0,("api_rpc_trans_reply: malloc fail.\n"));
		reply_nterror(req, NT_STATUS_NO_MEMORY);
		return;
	}

	status = np_read(fsp, rdata, max_trans_reply, &data_len,
			 &is_data_outstanding);
	if (!NT_STATUS_IS_OK(status)) {
		SAFE_FREE(rdata);
		api_no_reply(conn,req);
		return;
	}

	send_trans_reply(conn, req->inbuf, NULL, 0, (char *)rdata, data_len,
			 is_data_outstanding);
	SAFE_FREE(rdata);
	return;
}

/****************************************************************************
 WaitNamedPipeHandleState 
****************************************************************************/

static void api_WNPHS(connection_struct *conn, struct smb_request *req,
		      struct files_struct *fsp, char *param, int param_len)
{
	if (!param || param_len < 2) {
		reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
		return;
	}

	DEBUG(4,("WaitNamedPipeHandleState priority %x\n",
		 (int)SVAL(param,0)));

	send_trans_reply(conn, req->inbuf, NULL, 0, NULL, 0, False);
}


/****************************************************************************
 SetNamedPipeHandleState 
****************************************************************************/

static void api_SNPHS(connection_struct *conn, struct smb_request *req,
		      struct files_struct *fsp, char *param, int param_len)
{
	if (!param || param_len < 2) {
		reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
		return;
	}

	DEBUG(4,("SetNamedPipeHandleState to code %x\n", (int)SVAL(param,0)));

	send_trans_reply(conn, req->inbuf, NULL, 0, NULL, 0, False);
}


/****************************************************************************
 When no reply is generated, indicate unsupported.
 ****************************************************************************/

static void api_no_reply(connection_struct *conn, struct smb_request *req)
{
	char rparam[4];

	/* unsupported */
	SSVAL(rparam,0,NERR_notsupported);
	SSVAL(rparam,2,0); /* converter word */

	DEBUG(3,("Unsupported API fd command\n"));

	/* now send the reply */
	send_trans_reply(conn, req->inbuf, rparam, 4, NULL, 0, False);

	return;
}

/****************************************************************************
 Handle remote api calls delivered to a named pipe already opened.
 ****************************************************************************/

static void api_fd_reply(connection_struct *conn, uint16 vuid,
			 struct smb_request *req,
			 uint16 *setup, uint8_t *data, char *params,
			 int suwcnt, int tdscnt, int tpscnt,
			 int mdrcnt, int mprcnt)
{
	struct files_struct *fsp;
	int pnum;
	int subcommand;
	NTSTATUS status;

	DEBUG(5,("api_fd_reply\n"));

	/* First find out the name of this file. */
	if (suwcnt != 2) {
		DEBUG(0,("Unexpected named pipe transaction.\n"));
		reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
		return;
	}

	/* Get the file handle and hence the file name. */
	/* 
	 * NB. The setup array has already been transformed
	 * via SVAL and so is in host byte order.
	 */
	pnum = ((int)setup[1]) & 0xFFFF;
	subcommand = ((int)setup[0]) & 0xFFFF;

	fsp = file_fsp(req, pnum);

	if (!fsp_is_np(fsp)) {
		if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
			/* Win9x does this call with a unicode pipe name, not a pnum. */
			/* Just return success for now... */
			DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
			send_trans_reply(conn, req->inbuf, NULL, 0, NULL, 0,
					 False);
			return;
		}

		DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
		reply_nterror(req, NT_STATUS_INVALID_HANDLE);
		return;
	}

	if (vuid != fsp->vuid) {
		DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
			  "expected %d\n", pnum, vuid, fsp->vuid));
		reply_nterror(req, NT_STATUS_INVALID_HANDLE);
		return;
	}

	DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n",
		 subcommand, fsp->fsp_name, pnum));

	DEBUG(10, ("api_fd_reply: p:%p max_trans_reply: %d\n", fsp, mdrcnt));

	switch (subcommand) {
	case TRANSACT_DCERPCCMD: {
		/* dce/rpc command */
		ssize_t nwritten;
		status = np_write(fsp, data, tdscnt, &nwritten);
		if (!NT_STATUS_IS_OK(status)) {
			api_no_reply(conn, req);
			return;
		}
		api_rpc_trans_reply(conn, req, fsp, mdrcnt);
		break;
	}
	case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
		/* Wait Named Pipe Handle state */
		api_WNPHS(conn, req, fsp, params, tpscnt);
		break;
	case TRANSACT_SETNAMEDPIPEHANDLESTATE:
		/* Set Named Pipe Handle state */
		api_SNPHS(conn, req, fsp, params, tpscnt);
		break;
	default:
		reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
		return;
	}
}

/****************************************************************************
 Handle named pipe commands.
****************************************************************************/

static void named_pipe(connection_struct *conn, uint16 vuid,
		       struct smb_request *req,
		       const char *name, uint16 *setup,
		       char *data, char *params,
		       int suwcnt, int tdscnt,int tpscnt,
		       int msrcnt, int mdrcnt, int mprcnt)
{
	DEBUG(3,("named pipe command on <%s> name\n", name));

	if (strequal(name,"LANMAN")) {
		api_reply(conn, vuid, req,
			  data, params,
			  tdscnt, tpscnt,
			  mdrcnt, mprcnt);
		return;
	}

	if (strequal(name,"WKSSVC") ||
	    strequal(name,"SRVSVC") ||
	    strequal(name,"WINREG") ||
	    strequal(name,"SAMR") ||
	    strequal(name,"LSARPC")) {

		DEBUG(4,("named pipe command from Win95 (wow!)\n"));

		api_fd_reply(conn, vuid, req,
			     setup, (uint8_t *)data, params,
			     suwcnt, tdscnt, tpscnt,
			     mdrcnt, mprcnt);
		return;
	}

	if (strlen(name) < 1) {
		api_fd_reply(conn, vuid, req,
			     setup, (uint8_t *)data,
			     params, suwcnt, tdscnt,
			     tpscnt, mdrcnt, mprcnt);
		return;
	}

	if (setup)
		DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
			 (int)setup[0],(int)setup[1]));

	reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
	return;
}

static void handle_trans(connection_struct *conn, struct smb_request *req,
			 struct trans_state *state)
{
	char *local_machine_name;
	int name_offset = 0;

	DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
		 state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
		 (unsigned int)state->setup_count));

	/*
	 * WinCE wierdness....
	 */

	local_machine_name = talloc_asprintf(state, "\\%s\\",
					     get_local_machine_name());

	if (local_machine_name == NULL) {
		reply_nterror(req, NT_STATUS_NO_MEMORY);
		return;
	}

	if (strnequal(state->name, local_machine_name,
		      strlen(local_machine_name))) {
		name_offset = strlen(local_machine_name)-1;
	}

	if (!strnequal(&state->name[name_offset], "\\PIPE",
		       strlen("\\PIPE"))) {
		reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
		return;
	}

	name_offset += strlen("\\PIPE");

	/* Win9x weirdness.  When talking to a unicode server Win9x
	   only sends \PIPE instead of \PIPE\ */

	if (state->name[name_offset] == '\\')
		name_offset++;

	DEBUG(5,("calling named_pipe\n"));
	named_pipe(conn, state->vuid, req,
		   state->name+name_offset,
		   state->setup,state->data,
		   state->param,
		   state->setup_count,state->total_data,
		   state->total_param,
		   state->max_setup_return,
		   state->max_data_return,
		   state->max_param_return);

	if (state->close_on_completion) {
		close_cnum(conn,state->vuid);
		req->conn = NULL;
	}

	return;
}

/****************************************************************************
 Reply to a SMBtrans.
 ****************************************************************************/

void reply_trans(struct smb_request *req)
{
	connection_struct *conn = req->conn;
	unsigned int dsoff;
	unsigned int dscnt;
	unsigned int psoff;
	unsigned int pscnt;
	struct trans_state *state;
	NTSTATUS result;
	unsigned int size;
	unsigned int av_size;

	START_PROFILE(SMBtrans);

	if (req->wct < 14) {
		reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
		END_PROFILE(SMBtrans);
		return;
	}

	size = smb_len(req->inbuf) + 4;
	av_size = smb_len(req->inbuf);
	dsoff = SVAL(req->inbuf, smb_dsoff);
	dscnt = SVAL(req->inbuf, smb_dscnt);
	psoff = SVAL(req->inbuf, smb_psoff);
	pscnt = SVAL(req->inbuf, smb_pscnt);

	result = allow_new_trans(conn->pending_trans, req->mid);
	if (!NT_STATUS_IS_OK(result)) {
		DEBUG(2, ("Got invalid trans request: %s\n",
			  nt_errstr(result)));
		reply_nterror(req, result);
		END_PROFILE(SMBtrans);
		return;
	}

	if ((state = TALLOC_P(conn, struct trans_state)) == NULL) {
		DEBUG(0, ("talloc failed\n"));
		reply_nterror(req, NT_STATUS_NO_MEMORY);
		END_PROFILE(SMBtrans);
		return;
	}

	state->cmd = SMBtrans;

	state->mid = req->mid;
	state->vuid = req->vuid;
	state->setup_count = CVAL(req->inbuf, smb_suwcnt);
	state->setup = NULL;
	state->total_param = SVAL(req->inbuf, smb_tpscnt);
	state->param = NULL;
	state->total_data = SVAL(req->inbuf, smb_tdscnt);
	state->data = NULL;
	state->max_param_return = SVAL(req->inbuf, smb_mprcnt);
	state->max_data_return = SVAL(req->inbuf, smb_mdrcnt);
	state->max_setup_return = CVAL(req->inbuf, smb_msrcnt);
	state->close_on_completion = BITSETW(req->inbuf+smb_vwv5,0);
	state->one_way = BITSETW(req->inbuf+smb_vwv5,1);

	srvstr_pull_buf_talloc(state, req->inbuf, req->flags2, &state->name,
			       req->buf, STR_TERMINATE);

	if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
			!state->name)
		goto bad_param;

	if (state->total_data)  {
		/* Can't use talloc here, the core routines do realloc on the
		 * params and data. Out of paranoia, 100 bytes too many. */
		state->data = (char *)SMB_MALLOC(state->total_data+100);
		if (state->data == NULL) {
			DEBUG(0,("reply_trans: data malloc fail for %u "
				 "bytes !\n", (unsigned int)state->total_data));
			TALLOC_FREE(state);
			reply_nterror(req, NT_STATUS_NO_MEMORY);
			END_PROFILE(SMBtrans);
			return;
		}
		/* null-terminate the slack space */
		memset(&state->data[state->total_data], 0, 100);

		if (dscnt > state->total_data ||
				dsoff+dscnt < dsoff) {
			goto bad_param;
		}

		if (dsoff > av_size ||
				dscnt > av_size ||
				dsoff+dscnt > av_size) {
			goto bad_param;
		}

		memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
	}

	if (state->total_param) {
		/* Can't use talloc here, the core routines do realloc on the
		 * params and data. Out of paranoia, 100 bytes too many */
		state->param = (char *)SMB_MALLOC(state->total_param+100);
		if (state->param == NULL) {
			DEBUG(0,("reply_trans: param malloc fail for %u "
				 "bytes !\n", (unsigned int)state->total_param));
			SAFE_FREE(state->data);
			TALLOC_FREE(state);
			reply_nterror(req, NT_STATUS_NO_MEMORY);
			END_PROFILE(SMBtrans);
			return;
		} 
		/* null-terminate the slack space */
		memset(&state->param[state->total_param], 0, 100);

		if (pscnt > state->total_param ||
				psoff+pscnt < psoff) {
			goto bad_param;
		}

		if (psoff > av_size ||
				pscnt > av_size ||
				psoff+pscnt > av_size) {
			goto bad_param;
		}

		memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
	}

	state->received_data  = dscnt;
	state->received_param = pscnt;

	if (state->setup_count) {
		unsigned int i;
		if((state->setup = TALLOC_ARRAY(
			    state, uint16, state->setup_count)) == NULL) {
			DEBUG(0,("reply_trans: setup malloc fail for %u "
				 "bytes !\n", (unsigned int)
				 (state->setup_count * sizeof(uint16))));
			SAFE_FREE(state->data);
			SAFE_FREE(state->param);
			TALLOC_FREE(state);
			reply_nterror(req, NT_STATUS_NO_MEMORY);
			END_PROFILE(SMBtrans);
			return;
		} 
		if (req->inbuf+smb_vwv14+(state->setup_count*SIZEOFWORD) >
		    req->inbuf + size)
			goto bad_param;
		if ((smb_vwv14+(state->setup_count*SIZEOFWORD) < smb_vwv14) ||
		    (smb_vwv14+(state->setup_count*SIZEOFWORD) <
		     (state->setup_count*SIZEOFWORD)))
			goto bad_param;

		for (i=0;i<state->setup_count;i++)
			state->setup[i] = SVAL(req->inbuf,
					       smb_vwv14+i*SIZEOFWORD);
	}

	state->received_param = pscnt;

	if ((state->received_param != state->total_param) ||
	    (state->received_data != state->total_data)) {
		DLIST_ADD(conn->pending_trans, state);

		/* We need to send an interim response then receive the rest
		   of the parameter/data bytes */
		reply_outbuf(req, 0, 0);
		show_msg((char *)req->outbuf);
		END_PROFILE(SMBtrans);
		return;
	}

	handle_trans(conn, req, state);

	SAFE_FREE(state->data);
	SAFE_FREE(state->param);
	TALLOC_FREE(state);

	END_PROFILE(SMBtrans);
	return;

  bad_param:

	DEBUG(0,("reply_trans: invalid trans parameters\n"));
	SAFE_FREE(state->data);
	SAFE_FREE(state->param);
	TALLOC_FREE(state);
	END_PROFILE(SMBtrans);
	reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
	return;
}

/****************************************************************************
 Reply to a secondary SMBtrans.
 ****************************************************************************/

void reply_transs(struct smb_request *req)
{
	connection_struct *conn = req->conn;
	unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
	struct trans_state *state;
	unsigned int av_size;

	START_PROFILE(SMBtranss);

	show_msg((char *)req->inbuf);

	if (req->wct < 8) {
		reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
		END_PROFILE(SMBtranss);
		return;
	}

	for (state = conn->pending_trans; state != NULL;
	     state = state->next) {
		if (state->mid == req->mid) {
			break;
		}
	}

	if ((state == NULL) || (state->cmd != SMBtrans)) {
		reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
		END_PROFILE(SMBtranss);
		return;
	}

	/* Revise total_params and total_data in case they have changed
	 * downwards */

	if (SVAL(req->inbuf, smb_vwv0) < state->total_param)
		state->total_param = SVAL(req->inbuf,smb_vwv0);
	if (SVAL(req->inbuf, smb_vwv1) < state->total_data)
		state->total_data = SVAL(req->inbuf,smb_vwv1);

	av_size = smb_len(req->inbuf);

	pcnt = SVAL(req->inbuf, smb_spscnt);
	poff = SVAL(req->inbuf, smb_spsoff);
	pdisp = SVAL(req->inbuf, smb_spsdisp);

	dcnt = SVAL(req->inbuf, smb_sdscnt);
	doff = SVAL(req->inbuf, smb_sdsoff);
	ddisp = SVAL(req->inbuf, smb_sdsdisp);

	state->received_param += pcnt;
	state->received_data += dcnt;

	if ((state->received_data > state->total_data) ||
	    (state->received_param > state->total_param))
		goto bad_param;

	if (pcnt) {
		if (pdisp > state->total_param ||
				pcnt > state->total_param ||
				pdisp+pcnt > state->total_param ||
				pdisp+pcnt < pdisp) {
			goto bad_param;
		}

		if (poff > av_size ||
				pcnt > av_size ||
				poff+pcnt > av_size ||
				poff+pcnt < poff) {
			goto bad_param;
		}

		memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,
		       pcnt);
	}

	if (dcnt) {
		if (ddisp > state->total_data ||
				dcnt > state->total_data ||
				ddisp+dcnt > state->total_data ||
				ddisp+dcnt < ddisp) {
			goto bad_param;
		}

		if (ddisp > av_size ||
				dcnt > av_size ||
				ddisp+dcnt > av_size ||
				ddisp+dcnt < ddisp) {
			goto bad_param;
		}

		memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,
		       dcnt);
	}

	if ((state->received_param < state->total_param) ||
	    (state->received_data < state->total_data)) {
		END_PROFILE(SMBtranss);
		return;
	}

        /*
	 * construct_reply_common will copy smb_com from inbuf to
	 * outbuf. SMBtranss is wrong here.
         */
        SCVAL(req->inbuf,smb_com,SMBtrans);

	handle_trans(conn, req, state);

	DLIST_REMOVE(conn->pending_trans, state);
	SAFE_FREE(state->data);
	SAFE_FREE(state->param);
	TALLOC_FREE(state);

	END_PROFILE(SMBtranss);
	return;

  bad_param:

	DEBUG(0,("reply_transs: invalid trans parameters\n"));
	DLIST_REMOVE(conn->pending_trans, state);
	SAFE_FREE(state->data);
	SAFE_FREE(state->param);
	TALLOC_FREE(state);
	reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
	END_PROFILE(SMBtranss);
	return;
}