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Updated with sepcifics of how we determine sendfile.
[Samba.git] / source / smbd / ipc.c
blobf7b7c3132bdd3329631fe59c6f7f568f71fe389c
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 2 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, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23 /*
24 This file handles the named pipe and mailslot calls
25 in the SMBtrans protocol
26 */
27
28 #include "includes.h"
29
30 extern int max_send;
31
32 #define NERR_notsupported 50
33
34 extern int smb_read_error;
35
36 /*******************************************************************
37 copies parameters and data, as needed, into the smb buffer
38
39 *both* the data and params sections should be aligned. this
40 is fudged in the rpc pipes by
41 at present, only the data section is. this may be a possible
42 cause of some of the ipc problems being experienced. lkcl26dec97
43
44 ******************************************************************/
45
46 static void copy_trans_params_and_data(char *outbuf, int align,
47 char *rparam, int param_offset, int param_len,
48 char *rdata, int data_offset, int data_len)
49 {
50 char *copy_into = smb_buf(outbuf)+1;
51
52 if(param_len < 0)
53 param_len = 0;
54
55 if(data_len < 0)
56 data_len = 0;
57
58 DEBUG(5,("copy_trans_params_and_data: params[%d..%d] data[%d..%d]\n",
59 param_offset, param_offset + param_len,
60 data_offset , data_offset + data_len));
61
62 if (param_len)
63 memcpy(copy_into, &rparam[param_offset], param_len);
64
65 copy_into += param_len + align;
66
67 if (data_len )
68 memcpy(copy_into, &rdata[data_offset], data_len);
69 }
70
71 /****************************************************************************
72 Send a trans reply.
73 ****************************************************************************/
74
75 void send_trans_reply(char *outbuf,
76 char *rparam, int rparam_len,
77 char *rdata, int rdata_len,
78 BOOL buffer_too_large)
79 {
80 int this_ldata,this_lparam;
81 int tot_data_sent = 0;
82 int tot_param_sent = 0;
83 int align;
84
85 int ldata = rdata ? rdata_len : 0;
86 int lparam = rparam ? rparam_len : 0;
87
88 if (buffer_too_large)
89 DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
90
91 this_lparam = MIN(lparam,max_send - 500); /* hack */
92 this_ldata = MIN(ldata,max_send - (500+this_lparam));
93
94 align = ((this_lparam)%4);
95
96 if (buffer_too_large) {
97 ERROR_BOTH(STATUS_BUFFER_OVERFLOW,ERRDOS,ERRmoredata);
98 }
99
100 set_message(outbuf,10,1+align+this_ldata+this_lparam,True);
101
102 copy_trans_params_and_data(outbuf, align,
103 rparam, tot_param_sent, this_lparam,
104 rdata, tot_data_sent, this_ldata);
105
106 SSVAL(outbuf,smb_vwv0,lparam);
107 SSVAL(outbuf,smb_vwv1,ldata);
108 SSVAL(outbuf,smb_vwv3,this_lparam);
109 SSVAL(outbuf,smb_vwv4,smb_offset(smb_buf(outbuf)+1,outbuf));
110 SSVAL(outbuf,smb_vwv5,0);
111 SSVAL(outbuf,smb_vwv6,this_ldata);
112 SSVAL(outbuf,smb_vwv7,smb_offset(smb_buf(outbuf)+1+this_lparam+align,outbuf));
113 SSVAL(outbuf,smb_vwv8,0);
114 SSVAL(outbuf,smb_vwv9,0);
115
116 show_msg(outbuf);
117 if (!send_smb(smbd_server_fd(),outbuf))
118 exit_server_cleanly("send_trans_reply: send_smb failed.");
119
120 tot_data_sent = this_ldata;
121 tot_param_sent = this_lparam;
122
123 while (tot_data_sent < ldata || tot_param_sent < lparam)
124 {
125 this_lparam = MIN(lparam-tot_param_sent, max_send - 500); /* hack */
126 this_ldata = MIN(ldata -tot_data_sent, max_send - (500+this_lparam));
127
128 if(this_lparam < 0)
129 this_lparam = 0;
130
131 if(this_ldata < 0)
132 this_ldata = 0;
133
134 align = (this_lparam%4);
135
136 set_message(outbuf,10,1+this_ldata+this_lparam+align,False);
137
138 copy_trans_params_and_data(outbuf, align,
139 rparam, tot_param_sent, this_lparam,
140 rdata, tot_data_sent, this_ldata);
141
142 SSVAL(outbuf,smb_vwv3,this_lparam);
143 SSVAL(outbuf,smb_vwv4,smb_offset(smb_buf(outbuf)+1,outbuf));
144 SSVAL(outbuf,smb_vwv5,tot_param_sent);
145 SSVAL(outbuf,smb_vwv6,this_ldata);
146 SSVAL(outbuf,smb_vwv7,smb_offset(smb_buf(outbuf)+1+this_lparam+align,outbuf));
147 SSVAL(outbuf,smb_vwv8,tot_data_sent);
148 SSVAL(outbuf,smb_vwv9,0);
149
150 show_msg(outbuf);
151 if (!send_smb(smbd_server_fd(),outbuf))
152 exit_server_cleanly("send_trans_reply: send_smb failed.");
153
154 tot_data_sent += this_ldata;
155 tot_param_sent += this_lparam;
156 }
157 }
158
159 /****************************************************************************
160 Start the first part of an RPC reply which began with an SMBtrans request.
161 ****************************************************************************/
162
163 static BOOL api_rpc_trans_reply(char *outbuf, smb_np_struct *p)
164 {
165 BOOL is_data_outstanding;
166 char *rdata = (char *)SMB_MALLOC(p->max_trans_reply);
167 int data_len;
168
169 if(rdata == NULL) {
170 DEBUG(0,("api_rpc_trans_reply: malloc fail.\n"));
171 return False;
172 }
173
174 if((data_len = read_from_pipe( p, rdata, p->max_trans_reply,
175 &is_data_outstanding)) < 0) {
176 SAFE_FREE(rdata);
177 return False;
178 }
179
180 send_trans_reply(outbuf, NULL, 0, rdata, data_len, is_data_outstanding);
181
182 SAFE_FREE(rdata);
183 return True;
184 }
185
186 /****************************************************************************
187 WaitNamedPipeHandleState
188 ****************************************************************************/
189
190 static BOOL api_WNPHS(char *outbuf, smb_np_struct *p, char *param, int param_len)
191 {
192 uint16 priority;
193
194 if (!param || param_len < 2)
195 return False;
196
197 priority = SVAL(param,0);
198 DEBUG(4,("WaitNamedPipeHandleState priority %x\n", priority));
199
200 if (wait_rpc_pipe_hnd_state(p, priority)) {
201 /* now send the reply */
202 send_trans_reply(outbuf, NULL, 0, NULL, 0, False);
203 return True;
204 }
205 return False;
206 }
207
208
209 /****************************************************************************
210 SetNamedPipeHandleState
211 ****************************************************************************/
212
213 static BOOL api_SNPHS(char *outbuf, smb_np_struct *p, char *param, int param_len)
214 {
215 uint16 id;
216
217 if (!param || param_len < 2)
218 return False;
219
220 id = SVAL(param,0);
221 DEBUG(4,("SetNamedPipeHandleState to code %x\n", id));
222
223 if (set_rpc_pipe_hnd_state(p, id)) {
224 /* now send the reply */
225 send_trans_reply(outbuf, NULL, 0, NULL, 0, False);
226 return True;
227 }
228 return False;
229 }
230
231
232 /****************************************************************************
233 When no reply is generated, indicate unsupported.
234 ****************************************************************************/
235
236 static BOOL api_no_reply(char *outbuf, int max_rdata_len)
237 {
238 char rparam[4];
239
240 /* unsupported */
241 SSVAL(rparam,0,NERR_notsupported);
242 SSVAL(rparam,2,0); /* converter word */
243
244 DEBUG(3,("Unsupported API fd command\n"));
245
246 /* now send the reply */
247 send_trans_reply(outbuf, rparam, 4, NULL, 0, False);
248
249 return -1;
250 }
251
252 /****************************************************************************
253 Handle remote api calls delivered to a named pipe already opened.
254 ****************************************************************************/
255
256 static int api_fd_reply(connection_struct *conn,uint16 vuid,char *outbuf,
257 uint16 *setup,char *data,char *params,
258 int suwcnt,int tdscnt,int tpscnt,int mdrcnt,int mprcnt)
259 {
260 BOOL reply = False;
261 smb_np_struct *p = NULL;
262 int pnum;
263 int subcommand;
264
265 DEBUG(5,("api_fd_reply\n"));
266
267 /* First find out the name of this file. */
268 if (suwcnt != 2) {
269 DEBUG(0,("Unexpected named pipe transaction.\n"));
270 return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
271 }
272
273 /* Get the file handle and hence the file name. */
274 /*
275 * NB. The setup array has already been transformed
276 * via SVAL and so is in gost byte order.
277 */
278 pnum = ((int)setup[1]) & 0xFFFF;
279 subcommand = ((int)setup[0]) & 0xFFFF;
280
281 if(!(p = get_rpc_pipe(pnum))) {
282 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
283 /* Win9x does this call with a unicode pipe name, not a pnum. */
284 /* Just return success for now... */
285 DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
286 send_trans_reply(outbuf, NULL, 0, NULL, 0, False);
287 return -1;
288 }
289
290 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
291 return ERROR_NT(NT_STATUS_INVALID_HANDLE);
292 }
293
294 if (vuid != p->vuid) {
295 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
296 "expected %d\n", pnum, vuid, p->vuid));
297 return ERROR_NT(NT_STATUS_INVALID_HANDLE);
298 }
299
300 DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n", subcommand, p->name, pnum));
301
302 /* record maximum data length that can be transmitted in an SMBtrans */
303 p->max_trans_reply = mdrcnt;
304
305 DEBUG(10,("api_fd_reply: p:%p max_trans_reply: %d\n", p, p->max_trans_reply));
306
307 switch (subcommand) {
308 case TRANSACT_DCERPCCMD:
309 /* dce/rpc command */
310 reply = write_to_pipe(p, data, tdscnt);
311 if (reply)
312 reply = api_rpc_trans_reply(outbuf, p);
313 break;
314 case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
315 /* Wait Named Pipe Handle state */
316 reply = api_WNPHS(outbuf, p, params, tpscnt);
317 break;
318 case TRANSACT_SETNAMEDPIPEHANDLESTATE:
319 /* Set Named Pipe Handle state */
320 reply = api_SNPHS(outbuf, p, params, tpscnt);
321 break;
322 default:
323 return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
324 }
325
326 if (!reply)
327 return api_no_reply(outbuf, mdrcnt);
328
329 return -1;
330 }
331
332 /****************************************************************************
333 handle named pipe commands
334 ****************************************************************************/
335 static int named_pipe(connection_struct *conn,uint16 vuid, char *outbuf,char *name,
336 uint16 *setup,char *data,char *params,
337 int suwcnt,int tdscnt,int tpscnt,
338 int msrcnt,int mdrcnt,int mprcnt)
339 {
340 DEBUG(3,("named pipe command on <%s> name\n", name));
341
342 if (strequal(name,"LANMAN"))
343 return api_reply(conn,vuid,outbuf,data,params,tdscnt,tpscnt,mdrcnt,mprcnt);
344
345 if (strequal(name,"WKSSVC") ||
346 strequal(name,"SRVSVC") ||
347 strequal(name,"WINREG") ||
348 strequal(name,"SAMR") ||
349 strequal(name,"LSARPC"))
350 {
351 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
352 return api_fd_reply(conn,vuid,outbuf,setup,data,params,suwcnt,tdscnt,tpscnt,mdrcnt,mprcnt);
353 }
354
355 if (strlen(name) < 1)
356 return api_fd_reply(conn,vuid,outbuf,setup,data,params,suwcnt,tdscnt,tpscnt,mdrcnt,mprcnt);
357
358 if (setup)
359 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n", (int)setup[0],(int)setup[1]));
360
361 return 0;
362 }
363
364 static NTSTATUS handle_trans(connection_struct *conn,
365 struct trans_state *state,
366 char *outbuf, int *outsize)
367 {
368 char *local_machine_name;
369 int name_offset = 0;
370
371 DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
372 state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
373 (unsigned int)state->setup_count));
374
375 /*
376 * WinCE wierdness....
377 */
378
379 local_machine_name = talloc_asprintf(state, "\\%s\\",
380 get_local_machine_name());
381
382 if (local_machine_name == NULL) {
383 return NT_STATUS_NO_MEMORY;
384 }
385
386 if (strnequal(state->name, local_machine_name,
387 strlen(local_machine_name))) {
388 name_offset = strlen(local_machine_name)-1;
389 }
390
391 if (!strnequal(&state->name[name_offset], "\\PIPE",
392 strlen("\\PIPE"))) {
393 return NT_STATUS_NOT_SUPPORTED;
394 }
395
396 name_offset += strlen("\\PIPE");
397
398 /* Win9x weirdness. When talking to a unicode server Win9x
399 only sends \PIPE instead of \PIPE\ */
400
401 if (state->name[name_offset] == '\\')
402 name_offset++;
403
404 DEBUG(5,("calling named_pipe\n"));
405 *outsize = named_pipe(conn, state->vuid, outbuf,
406 state->name+name_offset,
407 state->setup,state->data,
408 state->param,
409 state->setup_count,state->total_data,
410 state->total_param,
411 state->max_setup_return,
412 state->max_data_return,
413 state->max_param_return);
414
415 if (*outsize == 0) {
416 return NT_STATUS_NOT_SUPPORTED;
417 }
418
419 if (state->close_on_completion)
420 close_cnum(conn,state->vuid);
421
422 return NT_STATUS_OK;
423 }
424
425 /****************************************************************************
426 Reply to a SMBtrans.
427 ****************************************************************************/
428
429 int reply_trans(connection_struct *conn, char *inbuf,char *outbuf,
430 int size, int bufsize)
431 {
432 int outsize = 0;
433 unsigned int dsoff = SVAL(inbuf, smb_dsoff);
434 unsigned int dscnt = SVAL(inbuf, smb_dscnt);
435 unsigned int psoff = SVAL(inbuf, smb_psoff);
436 unsigned int pscnt = SVAL(inbuf, smb_pscnt);
437 unsigned int av_size = size-4;
438 struct trans_state *state;
439 NTSTATUS result;
440
441 START_PROFILE(SMBtrans);
442
443 result = allow_new_trans(conn->pending_trans, SVAL(inbuf, smb_mid));
444 if (!NT_STATUS_IS_OK(result)) {
445 DEBUG(2, ("Got invalid trans request: %s\n",
446 nt_errstr(result)));
447 END_PROFILE(SMBtrans);
448 return ERROR_NT(result);
449 }
450
451 if ((state = TALLOC_P(conn->mem_ctx, struct trans_state)) == NULL) {
452 DEBUG(0, ("talloc failed\n"));
453 END_PROFILE(SMBtrans);
454 return ERROR_NT(NT_STATUS_NO_MEMORY);
455 }
456
457 state->cmd = SMBtrans;
458
459 state->mid = SVAL(inbuf, smb_mid);
460 state->vuid = SVAL(inbuf, smb_uid);
461 state->setup_count = CVAL(inbuf, smb_suwcnt);
462 state->setup = NULL;
463 state->total_param = SVAL(inbuf, smb_tpscnt);
464 state->param = NULL;
465 state->total_data = SVAL(inbuf, smb_tdscnt);
466 state->data = NULL;
467 state->max_param_return = SVAL(inbuf, smb_mprcnt);
468 state->max_data_return = SVAL(inbuf, smb_mdrcnt);
469 state->max_setup_return = CVAL(inbuf, smb_msrcnt);
470 state->close_on_completion = BITSETW(inbuf+smb_vwv5,0);
471 state->one_way = BITSETW(inbuf+smb_vwv5,1);
472
473 memset(state->name, '\0',sizeof(state->name));
474 srvstr_pull_buf(inbuf, state->name, smb_buf(inbuf),
475 sizeof(state->name), STR_TERMINATE);
476
477 if ((dscnt > state->total_data) || (pscnt > state->total_param))
478 goto bad_param;
479
480 if (state->total_data) {
481 /* Can't use talloc here, the core routines do realloc on the
482 * params and data. Out of paranoia, 100 bytes too many. */
483 state->data = (char *)SMB_MALLOC(state->total_data+100);
484 if (state->data == NULL) {
485 DEBUG(0,("reply_trans: data malloc fail for %u "
486 "bytes !\n", (unsigned int)state->total_data));
487 TALLOC_FREE(state);
488 END_PROFILE(SMBtrans);
489 return(ERROR_DOS(ERRDOS,ERRnomem));
490 }
491 /* null-terminate the slack space */
492 memset(&state->data[state->total_data], 0, 100);
493
494 if (dscnt > state->total_data ||
495 dsoff+dscnt < dsoff) {
496 goto bad_param;
497 }
498
499 if (dsoff > av_size ||
500 dscnt > av_size ||
501 dsoff+dscnt > av_size) {
502 goto bad_param;
503 }
504
505 memcpy(state->data,smb_base(inbuf)+dsoff,dscnt);
506 }
507
508 if (state->total_param) {
509 /* Can't use talloc here, the core routines do realloc on the
510 * params and data. Out of paranoia, 100 bytes too many */
511 state->param = (char *)SMB_MALLOC(state->total_param+100);
512 if (state->param == NULL) {
513 DEBUG(0,("reply_trans: param malloc fail for %u "
514 "bytes !\n", (unsigned int)state->total_param));
515 SAFE_FREE(state->data);
516 TALLOC_FREE(state);
517 END_PROFILE(SMBtrans);
518 return(ERROR_DOS(ERRDOS,ERRnomem));
519 }
520 /* null-terminate the slack space */
521 memset(&state->param[state->total_param], 0, 100);
522
523 if (pscnt > state->total_param ||
524 psoff+pscnt < psoff) {
525 goto bad_param;
526 }
527
528 if (psoff > av_size ||
529 pscnt > av_size ||
530 psoff+pscnt > av_size) {
531 goto bad_param;
532 }
533
534 memcpy(state->param,smb_base(inbuf)+psoff,pscnt);
535 }
536
537 state->received_data = dscnt;
538 state->received_param = pscnt;
539
540 if (state->setup_count) {
541 unsigned int i;
542 if((state->setup = TALLOC_ARRAY(
543 state, uint16, state->setup_count)) == NULL) {
544 DEBUG(0,("reply_trans: setup malloc fail for %u "
545 "bytes !\n", (unsigned int)
546 (state->setup_count * sizeof(uint16))));
547 TALLOC_FREE(state);
548 END_PROFILE(SMBtrans);
549 return(ERROR_DOS(ERRDOS,ERRnomem));
550 }
551 if (inbuf+smb_vwv14+(state->setup_count*SIZEOFWORD) >
552 inbuf + size)
553 goto bad_param;
554 if ((smb_vwv14+(state->setup_count*SIZEOFWORD) < smb_vwv14) ||
555 (smb_vwv14+(state->setup_count*SIZEOFWORD) <
556 (state->setup_count*SIZEOFWORD)))
557 goto bad_param;
558
559 for (i=0;i<state->setup_count;i++)
560 state->setup[i] = SVAL(inbuf,smb_vwv14+i*SIZEOFWORD);
561 }
562
563 state->received_param = pscnt;
564
565 if ((state->received_param == state->total_param) &&
566 (state->received_data == state->total_data)) {
567
568 result = handle_trans(conn, state, outbuf, &outsize);
569
570 SAFE_FREE(state->data);
571 SAFE_FREE(state->param);
572 TALLOC_FREE(state);
573
574 if (!NT_STATUS_IS_OK(result)) {
575 END_PROFILE(SMBtrans);
576 return ERROR_NT(result);
577 }
578
579 if (outsize == 0) {
580 END_PROFILE(SMBtrans);
581 return ERROR_NT(NT_STATUS_INTERNAL_ERROR);
582 }
583
584 END_PROFILE(SMBtrans);
585 return outsize;
586 }
587
588 DLIST_ADD(conn->pending_trans, state);
589
590 /* We need to send an interim response then receive the rest
591 of the parameter/data bytes */
592 outsize = set_message(outbuf,0,0,True);
593 show_msg(outbuf);
594 END_PROFILE(SMBtrans);
595 return outsize;
596
597 bad_param:
598
599 DEBUG(0,("reply_trans: invalid trans parameters\n"));
600 SAFE_FREE(state->data);
601 SAFE_FREE(state->param);
602 TALLOC_FREE(state);
603 END_PROFILE(SMBtrans);
604 return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
605 }
606
607 /****************************************************************************
608 Reply to a secondary SMBtrans.
609 ****************************************************************************/
610
611 int reply_transs(connection_struct *conn, char *inbuf,char *outbuf,
612 int size, int bufsize)
613 {
614 int outsize = 0;
615 unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
616 unsigned int av_size = size-4;
617 struct trans_state *state;
618 NTSTATUS result;
619
620 START_PROFILE(SMBtranss);
621
622 show_msg(inbuf);
623
624 for (state = conn->pending_trans; state != NULL;
625 state = state->next) {
626 if (state->mid == SVAL(inbuf,smb_mid)) {
627 break;
628 }
629 }
630
631 if ((state == NULL) || (state->cmd != SMBtrans)) {
632 END_PROFILE(SMBtranss);
633 return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
634 }
635
636 /* Revise total_params and total_data in case they have changed
637 * downwards */
638
639 if (SVAL(inbuf, smb_vwv0) < state->total_param)
640 state->total_param = SVAL(inbuf,smb_vwv0);
641 if (SVAL(inbuf, smb_vwv1) < state->total_data)
642 state->total_data = SVAL(inbuf,smb_vwv1);
643
644 pcnt = SVAL(inbuf, smb_spscnt);
645 poff = SVAL(inbuf, smb_spsoff);
646 pdisp = SVAL(inbuf, smb_spsdisp);
647
648 dcnt = SVAL(inbuf, smb_sdscnt);
649 doff = SVAL(inbuf, smb_sdsoff);
650 ddisp = SVAL(inbuf, smb_sdsdisp);
651
652 state->received_param += pcnt;
653 state->received_data += dcnt;
654
655 if ((state->received_data > state->total_data) ||
656 (state->received_param > state->total_param))
657 goto bad_param;
658
659 if (pcnt) {
660 if (pdisp > state->total_param ||
661 pcnt > state->total_param ||
662 pdisp+pcnt > state->total_param ||
663 pdisp+pcnt < pdisp) {
664 goto bad_param;
665 }
666
667 if (poff > av_size ||
668 pcnt > av_size ||
669 poff+pcnt > av_size ||
670 poff+pcnt < poff) {
671 goto bad_param;
672 }
673
674 memcpy(state->param+pdisp,smb_base(inbuf)+poff,
675 pcnt);
676 }
677
678 if (dcnt) {
679 if (ddisp > state->total_data ||
680 dcnt > state->total_data ||
681 ddisp+dcnt > state->total_data ||
682 ddisp+dcnt < ddisp) {
683 goto bad_param;
684 }
685
686 if (ddisp > av_size ||
687 dcnt > av_size ||
688 ddisp+dcnt > av_size ||
689 ddisp+dcnt < ddisp) {
690 goto bad_param;
691 }
692
693 memcpy(state->data+ddisp, smb_base(inbuf)+doff,
694 dcnt);
695 }
696
697 if ((state->received_param < state->total_param) ||
698 (state->received_data < state->total_data)) {
699 END_PROFILE(SMBtranss);
700 return -1;
701 }
702
703 /* construct_reply_common has done us the favor to pre-fill the
704 * command field with SMBtranss which is wrong :-)
705 */
706 SCVAL(outbuf,smb_com,SMBtrans);
707
708 result = handle_trans(conn, state, outbuf, &outsize);
709
710 DLIST_REMOVE(conn->pending_trans, state);
711 SAFE_FREE(state->data);
712 SAFE_FREE(state->param);
713 TALLOC_FREE(state);
714
715 if ((outsize == 0) || !NT_STATUS_IS_OK(result)) {
716 END_PROFILE(SMBtranss);
717 return(ERROR_DOS(ERRSRV,ERRnosupport));
718 }
719
720 END_PROFILE(SMBtranss);
721 return(outsize);
722
723 bad_param:
724
725 DEBUG(0,("reply_transs: invalid trans parameters\n"));
726 DLIST_REMOVE(conn->pending_trans, state);
727 SAFE_FREE(state->data);
728 SAFE_FREE(state->param);
729 TALLOC_FREE(state);
730 END_PROFILE(SMBtranss);
731 return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
732 }
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