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Fix proxy module
[Samba.git] / source3 / smbd / ipc.c
blob7c150561b150fbb55b94115c395d44d9117cad69
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 #include "smbd/globals.h"
29
30 #define NERR_notsupported 50
31
32 static void api_no_reply(connection_struct *conn, struct smb_request *req);
33
34 /*******************************************************************
35 copies parameters and data, as needed, into the smb buffer
36
37 *both* the data and params sections should be aligned. this
38 is fudged in the rpc pipes by
39 at present, only the data section is. this may be a possible
40 cause of some of the ipc problems being experienced. lkcl26dec97
41
42 ******************************************************************/
43
44 static void copy_trans_params_and_data(char *outbuf, int align,
45 char *rparam, int param_offset, int param_len,
46 char *rdata, int data_offset, int data_len)
47 {
48 char *copy_into = smb_buf(outbuf);
49
50 if(param_len < 0)
51 param_len = 0;
52
53 if(data_len < 0)
54 data_len = 0;
55
56 DEBUG(5,("copy_trans_params_and_data: params[%d..%d] data[%d..%d] (align %d)\n",
57 param_offset, param_offset + param_len,
58 data_offset , data_offset + data_len,
59 align));
60
61 *copy_into = '\0';
62
63 copy_into += 1;
64
65 if (param_len)
66 memcpy(copy_into, &rparam[param_offset], param_len);
67
68 copy_into += param_len;
69 if (align) {
70 memset(copy_into, '\0', align);
71 }
72
73 copy_into += align;
74
75 if (data_len )
76 memcpy(copy_into, &rdata[data_offset], data_len);
77 }
78
79 /****************************************************************************
80 Send a trans reply.
81 ****************************************************************************/
82
83 void send_trans_reply(connection_struct *conn,
84 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 /*
108 * We might have SMBtranss in req which was transferred to the outbuf,
109 * fix that.
110 */
111 SCVAL(req->outbuf, smb_com, SMBtrans);
112
113 copy_trans_params_and_data((char *)req->outbuf, align,
114 rparam, tot_param_sent, this_lparam,
115 rdata, tot_data_sent, this_ldata);
116
117 SSVAL(req->outbuf,smb_vwv0,lparam);
118 SSVAL(req->outbuf,smb_vwv1,ldata);
119 SSVAL(req->outbuf,smb_vwv3,this_lparam);
120 SSVAL(req->outbuf,smb_vwv4,
121 smb_offset(smb_buf(req->outbuf)+1, req->outbuf));
122 SSVAL(req->outbuf,smb_vwv5,0);
123 SSVAL(req->outbuf,smb_vwv6,this_ldata);
124 SSVAL(req->outbuf,smb_vwv7,
125 smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
126 req->outbuf));
127 SSVAL(req->outbuf,smb_vwv8,0);
128 SSVAL(req->outbuf,smb_vwv9,0);
129
130 if (buffer_too_large) {
131 error_packet_set((char *)req->outbuf, ERRDOS, ERRmoredata,
132 STATUS_BUFFER_OVERFLOW, __LINE__, __FILE__);
133 }
134
135 show_msg((char *)req->outbuf);
136 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
137 IS_CONN_ENCRYPTED(conn))) {
138 exit_server_cleanly("send_trans_reply: srv_send_smb failed.");
139 }
140
141 TALLOC_FREE(req->outbuf);
142
143 tot_data_sent = this_ldata;
144 tot_param_sent = this_lparam;
145
146 while (tot_data_sent < ldata || tot_param_sent < lparam)
147 {
148 this_lparam = MIN(lparam-tot_param_sent,
149 max_send - 500); /* hack */
150 this_ldata = MIN(ldata -tot_data_sent,
151 max_send - (500+this_lparam));
152
153 if(this_lparam < 0)
154 this_lparam = 0;
155
156 if(this_ldata < 0)
157 this_ldata = 0;
158
159 align = (this_lparam%4);
160
161 reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
162
163 /*
164 * We might have SMBtranss in req which was transferred to the
165 * outbuf, fix that.
166 */
167 SCVAL(req->outbuf, smb_com, SMBtrans);
168
169 copy_trans_params_and_data((char *)req->outbuf, align,
170 rparam, tot_param_sent, this_lparam,
171 rdata, tot_data_sent, this_ldata);
172
173 SSVAL(req->outbuf,smb_vwv3,this_lparam);
174 SSVAL(req->outbuf,smb_vwv4,
175 smb_offset(smb_buf(req->outbuf)+1,req->outbuf));
176 SSVAL(req->outbuf,smb_vwv5,tot_param_sent);
177 SSVAL(req->outbuf,smb_vwv6,this_ldata);
178 SSVAL(req->outbuf,smb_vwv7,
179 smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
180 req->outbuf));
181 SSVAL(req->outbuf,smb_vwv8,tot_data_sent);
182 SSVAL(req->outbuf,smb_vwv9,0);
183
184 if (buffer_too_large) {
185 error_packet_set((char *)req->outbuf,
186 ERRDOS, ERRmoredata,
187 STATUS_BUFFER_OVERFLOW,
188 __LINE__, __FILE__);
189 }
190
191 show_msg((char *)req->outbuf);
192 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
193 IS_CONN_ENCRYPTED(conn)))
194 exit_server_cleanly("send_trans_reply: srv_send_smb "
195 "failed.");
196
197 tot_data_sent += this_ldata;
198 tot_param_sent += this_lparam;
199 TALLOC_FREE(req->outbuf);
200 }
201 }
202
203 /****************************************************************************
204 Start the first part of an RPC reply which began with an SMBtrans request.
205 ****************************************************************************/
206
207 static void api_rpc_trans_reply(connection_struct *conn,
208 struct smb_request *req,
209 files_struct *fsp,
210 int max_trans_reply)
211 {
212 bool is_data_outstanding;
213 uint8_t *rdata = SMB_MALLOC_ARRAY(uint8_t, max_trans_reply);
214 ssize_t data_len;
215 NTSTATUS status;
216
217 if(rdata == NULL) {
218 DEBUG(0,("api_rpc_trans_reply: malloc fail.\n"));
219 reply_nterror(req, NT_STATUS_NO_MEMORY);
220 return;
221 }
222
223 if (!fsp_is_np(fsp)) {
224 SAFE_FREE(rdata);
225 api_no_reply(conn,req);
226 return;
227 }
228
229 status = np_read(fsp->fake_file_handle, rdata, max_trans_reply,
230 &data_len, &is_data_outstanding);
231 if (!NT_STATUS_IS_OK(status)) {
232 SAFE_FREE(rdata);
233 api_no_reply(conn,req);
234 return;
235 }
236
237 send_trans_reply(conn, req, NULL, 0, (char *)rdata, data_len,
238 is_data_outstanding);
239 SAFE_FREE(rdata);
240 return;
241 }
242
243 /****************************************************************************
244 WaitNamedPipeHandleState
245 ****************************************************************************/
246
247 static void api_WNPHS(connection_struct *conn, struct smb_request *req,
248 struct files_struct *fsp, char *param, int param_len)
249 {
250 if (!param || param_len < 2) {
251 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
252 return;
253 }
254
255 DEBUG(4,("WaitNamedPipeHandleState priority %x\n",
256 (int)SVAL(param,0)));
257
258 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
259 }
260
261
262 /****************************************************************************
263 SetNamedPipeHandleState
264 ****************************************************************************/
265
266 static void api_SNPHS(connection_struct *conn, struct smb_request *req,
267 struct files_struct *fsp, char *param, int param_len)
268 {
269 if (!param || param_len < 2) {
270 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
271 return;
272 }
273
274 DEBUG(4,("SetNamedPipeHandleState to code %x\n", (int)SVAL(param,0)));
275
276 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
277 }
278
279
280 /****************************************************************************
281 When no reply is generated, indicate unsupported.
282 ****************************************************************************/
283
284 static void api_no_reply(connection_struct *conn, struct smb_request *req)
285 {
286 char rparam[4];
287
288 /* unsupported */
289 SSVAL(rparam,0,NERR_notsupported);
290 SSVAL(rparam,2,0); /* converter word */
291
292 DEBUG(3,("Unsupported API fd command\n"));
293
294 /* now send the reply */
295 send_trans_reply(conn, req, rparam, 4, NULL, 0, False);
296
297 return;
298 }
299
300 /****************************************************************************
301 Handle remote api calls delivered to a named pipe already opened.
302 ****************************************************************************/
303
304 static void api_fd_reply(connection_struct *conn, uint16 vuid,
305 struct smb_request *req,
306 uint16 *setup, uint8_t *data, char *params,
307 int suwcnt, int tdscnt, int tpscnt,
308 int mdrcnt, int mprcnt)
309 {
310 struct files_struct *fsp;
311 int pnum;
312 int subcommand;
313 NTSTATUS status;
314
315 DEBUG(5,("api_fd_reply\n"));
316
317 /* First find out the name of this file. */
318 if (suwcnt != 2) {
319 DEBUG(0,("Unexpected named pipe transaction.\n"));
320 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
321 return;
322 }
323
324 /* Get the file handle and hence the file name. */
325 /*
326 * NB. The setup array has already been transformed
327 * via SVAL and so is in host byte order.
328 */
329 pnum = ((int)setup[1]) & 0xFFFF;
330 subcommand = ((int)setup[0]) & 0xFFFF;
331
332 fsp = file_fsp(req, pnum);
333
334 if (!fsp_is_np(fsp)) {
335 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
336 /* Win9x does this call with a unicode pipe name, not a pnum. */
337 /* Just return success for now... */
338 DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
339 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
340 return;
341 }
342
343 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
344 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
345 return;
346 }
347
348 if (vuid != fsp->vuid) {
349 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
350 "expected %d\n", pnum, vuid, fsp->vuid));
351 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
352 return;
353 }
354
355 DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n",
356 subcommand, fsp->fsp_name, pnum));
357
358 DEBUG(10, ("api_fd_reply: p:%p max_trans_reply: %d\n", fsp, mdrcnt));
359
360 switch (subcommand) {
361 case TRANSACT_DCERPCCMD: {
362 /* dce/rpc command */
363 ssize_t nwritten;
364 status = np_write(fsp->fake_file_handle, data, tdscnt,
365 &nwritten);
366 if (!NT_STATUS_IS_OK(status)) {
367 api_no_reply(conn, req);
368 return;
369 }
370 api_rpc_trans_reply(conn, req, fsp, mdrcnt);
371 break;
372 }
373 case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
374 /* Wait Named Pipe Handle state */
375 api_WNPHS(conn, req, fsp, params, tpscnt);
376 break;
377 case TRANSACT_SETNAMEDPIPEHANDLESTATE:
378 /* Set Named Pipe Handle state */
379 api_SNPHS(conn, req, fsp, params, tpscnt);
380 break;
381 default:
382 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
383 return;
384 }
385 }
386
387 /****************************************************************************
388 Handle named pipe commands.
389 ****************************************************************************/
390
391 static void named_pipe(connection_struct *conn, uint16 vuid,
392 struct smb_request *req,
393 const char *name, uint16 *setup,
394 char *data, char *params,
395 int suwcnt, int tdscnt,int tpscnt,
396 int msrcnt, int mdrcnt, int mprcnt)
397 {
398 DEBUG(3,("named pipe command on <%s> name\n", name));
399
400 if (strequal(name,"LANMAN")) {
401 api_reply(conn, vuid, req,
402 data, params,
403 tdscnt, tpscnt,
404 mdrcnt, mprcnt);
405 return;
406 }
407
408 if (strequal(name,"WKSSVC") ||
409 strequal(name,"SRVSVC") ||
410 strequal(name,"WINREG") ||
411 strequal(name,"SAMR") ||
412 strequal(name,"LSARPC")) {
413
414 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
415
416 api_fd_reply(conn, vuid, req,
417 setup, (uint8_t *)data, params,
418 suwcnt, tdscnt, tpscnt,
419 mdrcnt, mprcnt);
420 return;
421 }
422
423 if (strlen(name) < 1) {
424 api_fd_reply(conn, vuid, req,
425 setup, (uint8_t *)data,
426 params, suwcnt, tdscnt,
427 tpscnt, mdrcnt, mprcnt);
428 return;
429 }
430
431 if (setup)
432 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
433 (int)setup[0],(int)setup[1]));
434
435 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
436 return;
437 }
438
439 static void handle_trans(connection_struct *conn, struct smb_request *req,
440 struct trans_state *state)
441 {
442 char *local_machine_name;
443 int name_offset = 0;
444
445 DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
446 state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
447 (unsigned int)state->setup_count));
448
449 /*
450 * WinCE wierdness....
451 */
452
453 local_machine_name = talloc_asprintf(state, "\\%s\\",
454 get_local_machine_name());
455
456 if (local_machine_name == NULL) {
457 reply_nterror(req, NT_STATUS_NO_MEMORY);
458 return;
459 }
460
461 if (strnequal(state->name, local_machine_name,
462 strlen(local_machine_name))) {
463 name_offset = strlen(local_machine_name)-1;
464 }
465
466 if (!strnequal(&state->name[name_offset], "\\PIPE",
467 strlen("\\PIPE"))) {
468 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
469 return;
470 }
471
472 name_offset += strlen("\\PIPE");
473
474 /* Win9x weirdness. When talking to a unicode server Win9x
475 only sends \PIPE instead of \PIPE\ */
476
477 if (state->name[name_offset] == '\\')
478 name_offset++;
479
480 DEBUG(5,("calling named_pipe\n"));
481 named_pipe(conn, state->vuid, req,
482 state->name+name_offset,
483 state->setup,state->data,
484 state->param,
485 state->setup_count,state->total_data,
486 state->total_param,
487 state->max_setup_return,
488 state->max_data_return,
489 state->max_param_return);
490
491 if (state->close_on_completion) {
492 close_cnum(conn,state->vuid);
493 req->conn = NULL;
494 }
495
496 return;
497 }
498
499 /****************************************************************************
500 Reply to a SMBtrans.
501 ****************************************************************************/
502
503 void reply_trans(struct smb_request *req)
504 {
505 connection_struct *conn = req->conn;
506 unsigned int dsoff;
507 unsigned int dscnt;
508 unsigned int psoff;
509 unsigned int pscnt;
510 struct trans_state *state;
511 NTSTATUS result;
512
513 START_PROFILE(SMBtrans);
514
515 if (req->wct < 14) {
516 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
517 END_PROFILE(SMBtrans);
518 return;
519 }
520
521 dsoff = SVAL(req->vwv+12, 0);
522 dscnt = SVAL(req->vwv+11, 0);
523 psoff = SVAL(req->vwv+10, 0);
524 pscnt = SVAL(req->vwv+9, 0);
525
526 result = allow_new_trans(conn->pending_trans, req->mid);
527 if (!NT_STATUS_IS_OK(result)) {
528 DEBUG(2, ("Got invalid trans request: %s\n",
529 nt_errstr(result)));
530 reply_nterror(req, result);
531 END_PROFILE(SMBtrans);
532 return;
533 }
534
535 if ((state = TALLOC_P(conn, struct trans_state)) == NULL) {
536 DEBUG(0, ("talloc failed\n"));
537 reply_nterror(req, NT_STATUS_NO_MEMORY);
538 END_PROFILE(SMBtrans);
539 return;
540 }
541
542 state->cmd = SMBtrans;
543
544 state->mid = req->mid;
545 state->vuid = req->vuid;
546 state->setup_count = CVAL(req->vwv+13, 0);
547 state->setup = NULL;
548 state->total_param = SVAL(req->vwv+0, 0);
549 state->param = NULL;
550 state->total_data = SVAL(req->vwv+1, 0);
551 state->data = NULL;
552 state->max_param_return = SVAL(req->vwv+2, 0);
553 state->max_data_return = SVAL(req->vwv+3, 0);
554 state->max_setup_return = CVAL(req->vwv+4, 0);
555 state->close_on_completion = BITSETW(req->vwv+5, 0);
556 state->one_way = BITSETW(req->vwv+5, 1);
557
558 srvstr_pull_req_talloc(state, req, &state->name, req->buf,
559 STR_TERMINATE);
560
561 if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
562 !state->name)
563 goto bad_param;
564
565 if (state->total_data) {
566
567 if (trans_oob(state->total_data, 0, dscnt)
568 || trans_oob(smb_len(req->inbuf), dsoff, dscnt)) {
569 goto bad_param;
570 }
571
572 /* Can't use talloc here, the core routines do realloc on the
573 * params and data. Out of paranoia, 100 bytes too many. */
574 state->data = (char *)SMB_MALLOC(state->total_data+100);
575 if (state->data == NULL) {
576 DEBUG(0,("reply_trans: data malloc fail for %u "
577 "bytes !\n", (unsigned int)state->total_data));
578 TALLOC_FREE(state);
579 reply_nterror(req, NT_STATUS_NO_MEMORY);
580 END_PROFILE(SMBtrans);
581 return;
582 }
583 /* null-terminate the slack space */
584 memset(&state->data[state->total_data], 0, 100);
585
586 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
587 }
588
589 if (state->total_param) {
590
591 if (trans_oob(state->total_param, 0, pscnt)
592 || trans_oob(smb_len(req->inbuf), psoff, pscnt)) {
593 goto bad_param;
594 }
595
596 /* Can't use talloc here, the core routines do realloc on the
597 * params and data. Out of paranoia, 100 bytes too many */
598 state->param = (char *)SMB_MALLOC(state->total_param+100);
599 if (state->param == NULL) {
600 DEBUG(0,("reply_trans: param malloc fail for %u "
601 "bytes !\n", (unsigned int)state->total_param));
602 SAFE_FREE(state->data);
603 TALLOC_FREE(state);
604 reply_nterror(req, NT_STATUS_NO_MEMORY);
605 END_PROFILE(SMBtrans);
606 return;
607 }
608 /* null-terminate the slack space */
609 memset(&state->param[state->total_param], 0, 100);
610
611 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
612 }
613
614 state->received_data = dscnt;
615 state->received_param = pscnt;
616
617 if (state->setup_count) {
618 unsigned int i;
619
620 /*
621 * No overflow possible here, state->setup_count is an
622 * unsigned int, being filled by a single byte from
623 * CVAL(req->vwv+13, 0) above. The cast in the comparison
624 * below is not necessary, it's here to clarify things. The
625 * validity of req->vwv and req->wct has been checked in
626 * init_smb_request already.
627 */
628 if (state->setup_count + 14 > (unsigned int)req->wct) {
629 goto bad_param;
630 }
631
632 if((state->setup = TALLOC_ARRAY(
633 state, uint16, state->setup_count)) == NULL) {
634 DEBUG(0,("reply_trans: setup malloc fail for %u "
635 "bytes !\n", (unsigned int)
636 (state->setup_count * sizeof(uint16))));
637 SAFE_FREE(state->data);
638 SAFE_FREE(state->param);
639 TALLOC_FREE(state);
640 reply_nterror(req, NT_STATUS_NO_MEMORY);
641 END_PROFILE(SMBtrans);
642 return;
643 }
644
645 for (i=0;i<state->setup_count;i++) {
646 state->setup[i] = SVAL(req->vwv + 14 + i, 0);
647 }
648 }
649
650 state->received_param = pscnt;
651
652 if ((state->received_param != state->total_param) ||
653 (state->received_data != state->total_data)) {
654 DLIST_ADD(conn->pending_trans, state);
655
656 /* We need to send an interim response then receive the rest
657 of the parameter/data bytes */
658 reply_outbuf(req, 0, 0);
659 show_msg((char *)req->outbuf);
660 END_PROFILE(SMBtrans);
661 return;
662 }
663
664 handle_trans(conn, req, state);
665
666 SAFE_FREE(state->data);
667 SAFE_FREE(state->param);
668 TALLOC_FREE(state);
669
670 END_PROFILE(SMBtrans);
671 return;
672
673 bad_param:
674
675 DEBUG(0,("reply_trans: invalid trans parameters\n"));
676 SAFE_FREE(state->data);
677 SAFE_FREE(state->param);
678 TALLOC_FREE(state);
679 END_PROFILE(SMBtrans);
680 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
681 return;
682 }
683
684 /****************************************************************************
685 Reply to a secondary SMBtrans.
686 ****************************************************************************/
687
688 void reply_transs(struct smb_request *req)
689 {
690 connection_struct *conn = req->conn;
691 unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
692 struct trans_state *state;
693
694 START_PROFILE(SMBtranss);
695
696 show_msg((char *)req->inbuf);
697
698 if (req->wct < 8) {
699 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
700 END_PROFILE(SMBtranss);
701 return;
702 }
703
704 for (state = conn->pending_trans; state != NULL;
705 state = state->next) {
706 if (state->mid == req->mid) {
707 break;
708 }
709 }
710
711 if ((state == NULL) || (state->cmd != SMBtrans)) {
712 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
713 END_PROFILE(SMBtranss);
714 return;
715 }
716
717 /* Revise total_params and total_data in case they have changed
718 * downwards */
719
720 if (SVAL(req->vwv+0, 0) < state->total_param)
721 state->total_param = SVAL(req->vwv+0, 0);
722 if (SVAL(req->vwv+1, 0) < state->total_data)
723 state->total_data = SVAL(req->vwv+1, 0);
724
725 pcnt = SVAL(req->vwv+2, 0);
726 poff = SVAL(req->vwv+3, 0);
727 pdisp = SVAL(req->vwv+4, 0);
728
729 dcnt = SVAL(req->vwv+5, 0);
730 doff = SVAL(req->vwv+6, 0);
731 ddisp = SVAL(req->vwv+7, 0);
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 (trans_oob(state->total_param, pdisp, pcnt)
742 || trans_oob(smb_len(req->inbuf), poff, pcnt)) {
743 goto bad_param;
744 }
745 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,pcnt);
746 }
747
748 if (dcnt) {
749 if (trans_oob(state->total_data, ddisp, dcnt)
750 || trans_oob(smb_len(req->inbuf), doff, dcnt)) {
751 goto bad_param;
752 }
753 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,dcnt);
754 }
755
756 if ((state->received_param < state->total_param) ||
757 (state->received_data < state->total_data)) {
758 END_PROFILE(SMBtranss);
759 return;
760 }
761
762 handle_trans(conn, req, state);
763
764 DLIST_REMOVE(conn->pending_trans, state);
765 SAFE_FREE(state->data);
766 SAFE_FREE(state->param);
767 TALLOC_FREE(state);
768
769 END_PROFILE(SMBtranss);
770 return;
771
772 bad_param:
773
774 DEBUG(0,("reply_transs: invalid trans parameters\n"));
775 DLIST_REMOVE(conn->pending_trans, state);
776 SAFE_FREE(state->data);
777 SAFE_FREE(state->param);
778 TALLOC_FREE(state);
779 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
780 END_PROFILE(SMBtranss);
781 return;
782 }
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