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r24234: Reformatting -- SCNR
[Samba/gebeck_regimport.git] / source3 / smbd / ipc.c
blobc56d16780611a488db102d2e36ffb9ec103cbd89
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
29 extern int max_send;
30
31 #define NERR_notsupported 50
32
33 extern int smb_read_error;
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
45 static 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)+1;
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]\n",
58 param_offset, param_offset + param_len,
59 data_offset , data_offset + data_len));
60
61 if (param_len)
62 memcpy(copy_into, &rparam[param_offset], param_len);
63
64 copy_into += param_len + align;
65
66 if (data_len )
67 memcpy(copy_into, &rdata[data_offset], data_len);
68 }
69
70 /****************************************************************************
71 Send a trans reply.
72 ****************************************************************************/
73
74 void send_trans_reply(const char *inbuf,
75 char *outbuf,
76 char *rparam,
77 int rparam_len,
78 char *rdata,
79 int rdata_len,
80 BOOL buffer_too_large)
81 {
82 int this_ldata,this_lparam;
83 int tot_data_sent = 0;
84 int tot_param_sent = 0;
85 int align;
86
87 int ldata = rdata ? rdata_len : 0;
88 int lparam = rparam ? rparam_len : 0;
89
90 if (buffer_too_large)
91 DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
92
93 this_lparam = MIN(lparam,max_send - 500); /* hack */
94 this_ldata = MIN(ldata,max_send - (500+this_lparam));
95
96 align = ((this_lparam)%4);
97
98 if (buffer_too_large) {
99 ERROR_BOTH(STATUS_BUFFER_OVERFLOW,ERRDOS,ERRmoredata);
100 }
101
102 set_message(inbuf,outbuf,10,1+align+this_ldata+this_lparam,True);
103
104 copy_trans_params_and_data(outbuf, align,
105 rparam, tot_param_sent, this_lparam,
106 rdata, tot_data_sent, this_ldata);
107
108 SSVAL(outbuf,smb_vwv0,lparam);
109 SSVAL(outbuf,smb_vwv1,ldata);
110 SSVAL(outbuf,smb_vwv3,this_lparam);
111 SSVAL(outbuf,smb_vwv4,smb_offset(smb_buf(outbuf)+1,outbuf));
112 SSVAL(outbuf,smb_vwv5,0);
113 SSVAL(outbuf,smb_vwv6,this_ldata);
114 SSVAL(outbuf,smb_vwv7,smb_offset(smb_buf(outbuf)+1+this_lparam+align,outbuf));
115 SSVAL(outbuf,smb_vwv8,0);
116 SSVAL(outbuf,smb_vwv9,0);
117
118 show_msg(outbuf);
119 if (!send_smb(smbd_server_fd(),outbuf))
120 exit_server_cleanly("send_trans_reply: send_smb failed.");
121
122 tot_data_sent = this_ldata;
123 tot_param_sent = this_lparam;
124
125 while (tot_data_sent < ldata || tot_param_sent < lparam)
126 {
127 this_lparam = MIN(lparam-tot_param_sent, max_send - 500); /* hack */
128 this_ldata = MIN(ldata -tot_data_sent, max_send - (500+this_lparam));
129
130 if(this_lparam < 0)
131 this_lparam = 0;
132
133 if(this_ldata < 0)
134 this_ldata = 0;
135
136 align = (this_lparam%4);
137
138 set_message(inbuf,outbuf,10,1+this_ldata+this_lparam+align,False);
139
140 copy_trans_params_and_data(outbuf, align,
141 rparam, tot_param_sent, this_lparam,
142 rdata, tot_data_sent, this_ldata);
143
144 SSVAL(outbuf,smb_vwv3,this_lparam);
145 SSVAL(outbuf,smb_vwv4,smb_offset(smb_buf(outbuf)+1,outbuf));
146 SSVAL(outbuf,smb_vwv5,tot_param_sent);
147 SSVAL(outbuf,smb_vwv6,this_ldata);
148 SSVAL(outbuf,smb_vwv7,smb_offset(smb_buf(outbuf)+1+this_lparam+align,outbuf));
149 SSVAL(outbuf,smb_vwv8,tot_data_sent);
150 SSVAL(outbuf,smb_vwv9,0);
151
152 show_msg(outbuf);
153 if (!send_smb(smbd_server_fd(),outbuf))
154 exit_server_cleanly("send_trans_reply: send_smb failed.");
155
156 tot_data_sent += this_ldata;
157 tot_param_sent += this_lparam;
158 }
159 }
160
161 /****************************************************************************
162 Start the first part of an RPC reply which began with an SMBtrans request.
163 ****************************************************************************/
164
165 static BOOL api_rpc_trans_reply(const char *inbuf,
166 char *outbuf,
167 smb_np_struct *p)
168 {
169 BOOL is_data_outstanding;
170 char *rdata = (char *)SMB_MALLOC(p->max_trans_reply);
171 int data_len;
172
173 if(rdata == NULL) {
174 DEBUG(0,("api_rpc_trans_reply: malloc fail.\n"));
175 return False;
176 }
177
178 if((data_len = read_from_pipe( p, rdata, p->max_trans_reply,
179 &is_data_outstanding)) < 0) {
180 SAFE_FREE(rdata);
181 return False;
182 }
183
184 send_trans_reply(inbuf, outbuf, NULL, 0, rdata, data_len, is_data_outstanding);
185
186 SAFE_FREE(rdata);
187 return True;
188 }
189
190 /****************************************************************************
191 WaitNamedPipeHandleState
192 ****************************************************************************/
193
194 static BOOL api_WNPHS(const char *inbuf,
195 char *outbuf,
196 smb_np_struct *p,
197 char *param,
198 int param_len)
199 {
200 uint16 priority;
201
202 if (!param || param_len < 2)
203 return False;
204
205 priority = SVAL(param,0);
206 DEBUG(4,("WaitNamedPipeHandleState priority %x\n", priority));
207
208 if (wait_rpc_pipe_hnd_state(p, priority)) {
209 /* now send the reply */
210 send_trans_reply(inbuf, outbuf, NULL, 0, NULL, 0, False);
211 return True;
212 }
213 return False;
214 }
215
216
217 /****************************************************************************
218 SetNamedPipeHandleState
219 ****************************************************************************/
220
221 static BOOL api_SNPHS(const char *inbuf,
222 char *outbuf,
223 smb_np_struct *p,
224 char *param,
225 int param_len)
226 {
227 uint16 id;
228
229 if (!param || param_len < 2)
230 return False;
231
232 id = SVAL(param,0);
233 DEBUG(4,("SetNamedPipeHandleState to code %x\n", id));
234
235 if (set_rpc_pipe_hnd_state(p, id)) {
236 /* now send the reply */
237 send_trans_reply(inbuf, outbuf, NULL, 0, NULL, 0, False);
238 return True;
239 }
240 return False;
241 }
242
243
244 /****************************************************************************
245 When no reply is generated, indicate unsupported.
246 ****************************************************************************/
247
248 static BOOL api_no_reply(const char *inbuf, char *outbuf, int max_rdata_len)
249 {
250 char rparam[4];
251
252 /* unsupported */
253 SSVAL(rparam,0,NERR_notsupported);
254 SSVAL(rparam,2,0); /* converter word */
255
256 DEBUG(3,("Unsupported API fd command\n"));
257
258 /* now send the reply */
259 send_trans_reply(inbuf, outbuf, rparam, 4, NULL, 0, False);
260
261 return -1;
262 }
263
264 /****************************************************************************
265 Handle remote api calls delivered to a named pipe already opened.
266 ****************************************************************************/
267
268 static int api_fd_reply(connection_struct *conn,
269 uint16 vuid,
270 const char *inbuf,
271 char *outbuf,
272 uint16 *setup,
273 char *data,
274 char *params,
275 int suwcnt,
276 int tdscnt,
277 int tpscnt,
278 int mdrcnt,
279 int mprcnt)
280 {
281 BOOL reply = False;
282 smb_np_struct *p = NULL;
283 int pnum;
284 int subcommand;
285
286 DEBUG(5,("api_fd_reply\n"));
287
288 /* First find out the name of this file. */
289 if (suwcnt != 2) {
290 DEBUG(0,("Unexpected named pipe transaction.\n"));
291 return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
292 }
293
294 /* Get the file handle and hence the file name. */
295 /*
296 * NB. The setup array has already been transformed
297 * via SVAL and so is in gost byte order.
298 */
299 pnum = ((int)setup[1]) & 0xFFFF;
300 subcommand = ((int)setup[0]) & 0xFFFF;
301
302 if(!(p = get_rpc_pipe(pnum))) {
303 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
304 /* Win9x does this call with a unicode pipe name, not a pnum. */
305 /* Just return success for now... */
306 DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
307 send_trans_reply(inbuf, outbuf, NULL, 0, NULL, 0, False);
308 return -1;
309 }
310
311 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
312 return ERROR_NT(NT_STATUS_INVALID_HANDLE);
313 }
314
315 if (vuid != p->vuid) {
316 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
317 "expected %d\n", pnum, vuid, p->vuid));
318 return ERROR_NT(NT_STATUS_INVALID_HANDLE);
319 }
320
321 DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n", subcommand, p->name, pnum));
322
323 /* record maximum data length that can be transmitted in an SMBtrans */
324 p->max_trans_reply = mdrcnt;
325
326 DEBUG(10,("api_fd_reply: p:%p max_trans_reply: %d\n", p, p->max_trans_reply));
327
328 switch (subcommand) {
329 case TRANSACT_DCERPCCMD:
330 /* dce/rpc command */
331 reply = write_to_pipe(p, data, tdscnt);
332 if (reply)
333 reply = api_rpc_trans_reply(inbuf, outbuf, p);
334 break;
335 case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
336 /* Wait Named Pipe Handle state */
337 reply = api_WNPHS(inbuf, outbuf, p, params, tpscnt);
338 break;
339 case TRANSACT_SETNAMEDPIPEHANDLESTATE:
340 /* Set Named Pipe Handle state */
341 reply = api_SNPHS(inbuf, outbuf, p, params, tpscnt);
342 break;
343 default:
344 return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
345 }
346
347 if (!reply)
348 return api_no_reply(inbuf, outbuf, mdrcnt);
349
350 return -1;
351 }
352
353 /****************************************************************************
354 Handle named pipe commands.
355 ****************************************************************************/
356
357 static int named_pipe(connection_struct *conn, uint16 vuid,
358 const char *inbuf, char *outbuf,
359 char *name, uint16 *setup,
360 char *data, char *params,
361 int suwcnt, int tdscnt,int tpscnt,
362 int msrcnt, int mdrcnt, int mprcnt)
363 {
364 DEBUG(3,("named pipe command on <%s> name\n", name));
365
366 if (strequal(name,"LANMAN")) {
367 return api_reply(conn, vuid, inbuf, outbuf,
368 data, params,
369 tdscnt, tpscnt,
370 mdrcnt, mprcnt);
371 }
372
373 if (strequal(name,"WKSSVC") ||
374 strequal(name,"SRVSVC") ||
375 strequal(name,"WINREG") ||
376 strequal(name,"SAMR") ||
377 strequal(name,"LSARPC")) {
378 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
379 return api_fd_reply(conn, vuid, inbuf, outbuf,
380 setup, data, params,
381 suwcnt, tdscnt, tpscnt,
382 mdrcnt, mprcnt);
383 }
384
385 if (strlen(name) < 1) {
386 return api_fd_reply(conn, vuid, inbuf, outbuf,
387 setup, data,
388 params, suwcnt, tdscnt,
389 tpscnt, mdrcnt, mprcnt);
390 }
391
392 if (setup)
393 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
394 (int)setup[0],(int)setup[1]));
395
396 return 0;
397 }
398
399 static NTSTATUS handle_trans(connection_struct *conn,
400 struct smb_request *req,
401 struct trans_state *state,
402 int *outsize)
403 {
404 char *local_machine_name;
405 int name_offset = 0;
406 char *inbuf, *outbuf;
407 int size, bufsize;
408
409 DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
410 state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
411 (unsigned int)state->setup_count));
412
413 if (!reply_prep_legacy(req, &inbuf, &outbuf, &size, &bufsize)) {
414 return NT_STATUS_NO_MEMORY;
415 }
416
417 /*
418 * WinCE wierdness....
419 */
420
421 local_machine_name = talloc_asprintf(state, "\\%s\\",
422 get_local_machine_name());
423
424 if (local_machine_name == NULL) {
425 return NT_STATUS_NO_MEMORY;
426 }
427
428 if (strnequal(state->name, local_machine_name,
429 strlen(local_machine_name))) {
430 name_offset = strlen(local_machine_name)-1;
431 }
432
433 if (!strnequal(&state->name[name_offset], "\\PIPE",
434 strlen("\\PIPE"))) {
435 return NT_STATUS_NOT_SUPPORTED;
436 }
437
438 name_offset += strlen("\\PIPE");
439
440 /* Win9x weirdness. When talking to a unicode server Win9x
441 only sends \PIPE instead of \PIPE\ */
442
443 if (state->name[name_offset] == '\\')
444 name_offset++;
445
446 DEBUG(5,("calling named_pipe\n"));
447 *outsize = named_pipe(conn,
448 state->vuid,
449 inbuf,
450 outbuf,
451 state->name+name_offset,
452 state->setup,state->data,
453 state->param,
454 state->setup_count,state->total_data,
455 state->total_param,
456 state->max_setup_return,
457 state->max_data_return,
458 state->max_param_return);
459
460 if (*outsize == 0) {
461 return NT_STATUS_NOT_SUPPORTED;
462 }
463
464 if (state->close_on_completion)
465 close_cnum(conn,state->vuid);
466
467 reply_post_legacy(req, *outsize);
468
469 return NT_STATUS_OK;
470 }
471
472 /****************************************************************************
473 Reply to a SMBtrans.
474 ****************************************************************************/
475
476 void reply_trans(connection_struct *conn, struct smb_request *req)
477 {
478 int outsize = 0;
479 unsigned int dsoff;
480 unsigned int dscnt;
481 unsigned int psoff;
482 unsigned int pscnt;
483 struct trans_state *state;
484 NTSTATUS result;
485 int size;
486
487 START_PROFILE(SMBtrans);
488
489 if (SVAL(req->inbuf, smb_wct) < 10) {
490 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
491 END_PROFILE(SMBtrans);
492 return;
493 }
494
495 size = smb_len(req->inbuf) + 4;
496 dsoff = SVAL(req->inbuf, smb_dsoff);
497 dscnt = SVAL(req->inbuf, smb_dscnt);
498 psoff = SVAL(req->inbuf, smb_psoff);
499 pscnt = SVAL(req->inbuf, smb_pscnt);
500
501 result = allow_new_trans(conn->pending_trans, req->mid);
502 if (!NT_STATUS_IS_OK(result)) {
503 DEBUG(2, ("Got invalid trans request: %s\n",
504 nt_errstr(result)));
505 reply_nterror(req, result);
506 END_PROFILE(SMBtrans);
507 return;
508 }
509
510 if ((state = TALLOC_P(conn->mem_ctx, struct trans_state)) == NULL) {
511 DEBUG(0, ("talloc failed\n"));
512 reply_nterror(req, NT_STATUS_NO_MEMORY);
513 END_PROFILE(SMBtrans);
514 return;
515 }
516
517 state->cmd = SMBtrans;
518
519 state->mid = req->mid;
520 state->vuid = req->vuid;
521 state->setup_count = CVAL(req->inbuf, smb_suwcnt);
522 state->setup = NULL;
523 state->total_param = SVAL(req->inbuf, smb_tpscnt);
524 state->param = NULL;
525 state->total_data = SVAL(req->inbuf, smb_tdscnt);
526 state->data = NULL;
527 state->max_param_return = SVAL(req->inbuf, smb_mprcnt);
528 state->max_data_return = SVAL(req->inbuf, smb_mdrcnt);
529 state->max_setup_return = CVAL(req->inbuf, smb_msrcnt);
530 state->close_on_completion = BITSETW(req->inbuf+smb_vwv5,0);
531 state->one_way = BITSETW(req->inbuf+smb_vwv5,1);
532
533 memset(state->name, '\0',sizeof(state->name));
534 srvstr_pull_buf(req->inbuf, req->flags2, state->name,
535 smb_buf(req->inbuf), sizeof(state->name),
536 STR_TERMINATE);
537
538 if ((dscnt > state->total_data) || (pscnt > state->total_param))
539 goto bad_param;
540
541 if (state->total_data) {
542 /* Can't use talloc here, the core routines do realloc on the
543 * params and data. Out of paranoia, 100 bytes too many. */
544 state->data = (char *)SMB_MALLOC(state->total_data+100);
545 if (state->data == NULL) {
546 DEBUG(0,("reply_trans: data malloc fail for %u "
547 "bytes !\n", (unsigned int)state->total_data));
548 TALLOC_FREE(state);
549 reply_nterror(req, NT_STATUS_NO_MEMORY);
550 END_PROFILE(SMBtrans);
551 return;
552 }
553 /* null-terminate the slack space */
554 memset(&state->data[state->total_data], 0, 100);
555 if ((dsoff+dscnt < dsoff) || (dsoff+dscnt < dscnt))
556 goto bad_param;
557 if ((smb_base(req->inbuf)+dsoff+dscnt
558 > (char *)req->inbuf + size) ||
559 (smb_base(req->inbuf)+dsoff+dscnt < smb_base(req->inbuf)))
560 goto bad_param;
561
562 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
563 }
564
565 if (state->total_param) {
566 /* Can't use talloc here, the core routines do realloc on the
567 * params and data. Out of paranoia, 100 bytes too many */
568 state->param = (char *)SMB_MALLOC(state->total_param+100);
569 if (state->param == NULL) {
570 DEBUG(0,("reply_trans: param malloc fail for %u "
571 "bytes !\n", (unsigned int)state->total_param));
572 SAFE_FREE(state->data);
573 TALLOC_FREE(state);
574 reply_nterror(req, NT_STATUS_NO_MEMORY);
575 END_PROFILE(SMBtrans);
576 return;
577 }
578 /* null-terminate the slack space */
579 memset(&state->param[state->total_param], 0, 100);
580 if ((psoff+pscnt < psoff) || (psoff+pscnt < pscnt))
581 goto bad_param;
582 if ((smb_base(req->inbuf)+psoff+pscnt
583 > (char *)req->inbuf + size) ||
584 (smb_base(req->inbuf)+psoff+pscnt < smb_base(req->inbuf)))
585 goto bad_param;
586
587 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
588 }
589
590 state->received_data = dscnt;
591 state->received_param = pscnt;
592
593 if (state->setup_count) {
594 unsigned int i;
595 if((state->setup = TALLOC_ARRAY(
596 state, uint16, state->setup_count)) == NULL) {
597 DEBUG(0,("reply_trans: setup malloc fail for %u "
598 "bytes !\n", (unsigned int)
599 (state->setup_count * sizeof(uint16))));
600 SAFE_FREE(state->data);
601 SAFE_FREE(state->param);
602 TALLOC_FREE(state);
603 reply_nterror(req, NT_STATUS_NO_MEMORY);
604 END_PROFILE(SMBtrans);
605 return;
606 }
607 if (req->inbuf+smb_vwv14+(state->setup_count*SIZEOFWORD) >
608 req->inbuf + size)
609 goto bad_param;
610 if ((smb_vwv14+(state->setup_count*SIZEOFWORD) < smb_vwv14) ||
611 (smb_vwv14+(state->setup_count*SIZEOFWORD) <
612 (state->setup_count*SIZEOFWORD)))
613 goto bad_param;
614
615 for (i=0;i<state->setup_count;i++)
616 state->setup[i] = SVAL(req->inbuf,
617 smb_vwv14+i*SIZEOFWORD);
618 }
619
620 state->received_param = pscnt;
621
622 if ((state->received_param != state->total_param) ||
623 (state->received_data != state->total_data)) {
624 DLIST_ADD(conn->pending_trans, state);
625
626 /* We need to send an interim response then receive the rest
627 of the parameter/data bytes */
628 reply_outbuf(req, 0, 0);
629 show_msg((char *)req->outbuf);
630 END_PROFILE(SMBtrans);
631 return;
632 }
633
634 result = handle_trans(conn, req, state, &outsize);
635
636 SAFE_FREE(state->data);
637 SAFE_FREE(state->param);
638 TALLOC_FREE(state);
639
640 if (!NT_STATUS_IS_OK(result)) {
641 reply_nterror(req, result);
642 END_PROFILE(SMBtrans);
643 return;
644 }
645
646 if (outsize == 0) {
647 reply_nterror(req, NT_STATUS_INTERNAL_ERROR);
648 END_PROFILE(SMBtrans);
649 return;
650 }
651
652 END_PROFILE(SMBtrans);
653 return;
654
655 bad_param:
656
657 DEBUG(0,("reply_trans: invalid trans parameters\n"));
658 SAFE_FREE(state->data);
659 SAFE_FREE(state->param);
660 TALLOC_FREE(state);
661 END_PROFILE(SMBtrans);
662 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
663 return;
664 }
665
666 /****************************************************************************
667 Reply to a secondary SMBtrans.
668 ****************************************************************************/
669
670 void reply_transs(connection_struct *conn, struct smb_request *req)
671 {
672 int outsize = 0;
673 unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
674 struct trans_state *state;
675 NTSTATUS result;
676 int size;
677
678 START_PROFILE(SMBtranss);
679
680 show_msg((char *)req->inbuf);
681
682 if (req->wct < 10) {
683 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
684 END_PROFILE(SMBtranss);
685 return;
686 }
687
688 for (state = conn->pending_trans; state != NULL;
689 state = state->next) {
690 if (state->mid == req->mid) {
691 break;
692 }
693 }
694
695 if ((state == NULL) || (state->cmd != SMBtrans)) {
696 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
697 END_PROFILE(SMBtranss);
698 return;
699 }
700
701 /* Revise total_params and total_data in case they have changed
702 * downwards */
703
704 if (SVAL(req->inbuf, smb_vwv0) < state->total_param)
705 state->total_param = SVAL(req->inbuf,smb_vwv0);
706 if (SVAL(req->inbuf, smb_vwv1) < state->total_data)
707 state->total_data = SVAL(req->inbuf,smb_vwv1);
708
709 size = smb_len(req->inbuf) + 4;
710
711 pcnt = SVAL(req->inbuf, smb_spscnt);
712 poff = SVAL(req->inbuf, smb_spsoff);
713 pdisp = SVAL(req->inbuf, smb_spsdisp);
714
715 dcnt = SVAL(req->inbuf, smb_sdscnt);
716 doff = SVAL(req->inbuf, smb_sdsoff);
717 ddisp = SVAL(req->inbuf, smb_sdsdisp);
718
719 state->received_param += pcnt;
720 state->received_data += dcnt;
721
722 if ((state->received_data > state->total_data) ||
723 (state->received_param > state->total_param))
724 goto bad_param;
725
726 if (pcnt) {
727 if (pdisp+pcnt > state->total_param)
728 goto bad_param;
729 if ((pdisp+pcnt < pdisp) || (pdisp+pcnt < pcnt))
730 goto bad_param;
731 if (pdisp > state->total_param)
732 goto bad_param;
733 if ((smb_base(req->inbuf) + poff + pcnt
734 > (char *)req->inbuf + size) ||
735 (smb_base(req->inbuf) + poff + pcnt
736 < smb_base(req->inbuf)))
737 goto bad_param;
738 if (state->param + pdisp < state->param)
739 goto bad_param;
740
741 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,
742 pcnt);
743 }
744
745 if (dcnt) {
746 if (ddisp+dcnt > state->total_data)
747 goto bad_param;
748 if ((ddisp+dcnt < ddisp) || (ddisp+dcnt < dcnt))
749 goto bad_param;
750 if (ddisp > state->total_data)
751 goto bad_param;
752 if ((smb_base(req->inbuf) + doff + dcnt
753 > (char *)req->inbuf + size) ||
754 (smb_base(req->inbuf) + doff + dcnt
755 < smb_base(req->inbuf)))
756 goto bad_param;
757 if (state->data + ddisp < state->data)
758 goto bad_param;
759
760 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,
761 dcnt);
762 }
763
764 if ((state->received_param < state->total_param) ||
765 (state->received_data < state->total_data)) {
766 END_PROFILE(SMBtranss);
767 return;
768 }
769
770 /* construct_reply_common has done us the favor to pre-fill the
771 * command field with SMBtranss which is wrong :-)
772 */
773 SCVAL(req->outbuf,smb_com,SMBtrans);
774
775 result = handle_trans(conn, req, state, &outsize);
776
777 DLIST_REMOVE(conn->pending_trans, state);
778 SAFE_FREE(state->data);
779 SAFE_FREE(state->param);
780 TALLOC_FREE(state);
781
782 if ((outsize == 0) || !NT_STATUS_IS_OK(result)) {
783 reply_doserror(req, ERRSRV, ERRnosupport);
784 END_PROFILE(SMBtranss);
785 return;
786 }
787
788 END_PROFILE(SMBtranss);
789 return;
790
791 bad_param:
792
793 DEBUG(0,("reply_transs: invalid trans parameters\n"));
794 DLIST_REMOVE(conn->pending_trans, state);
795 SAFE_FREE(state->data);
796 SAFE_FREE(state->param);
797 TALLOC_FREE(state);
798 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
799 END_PROFILE(SMBtranss);
800 return;
801 }
reg import