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Do not write into inbuf for the transs request
[Samba/gebeck_regimport.git] / source3 / smbd / ipc.c
blob26a4212ec91f9fda3402be6c4626e67e18198000
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 static void api_no_reply(connection_struct *conn, struct smb_request *req);
34
35 /*******************************************************************
36 copies parameters and data, as needed, into the smb buffer
37
38 *both* the data and params sections should be aligned. this
39 is fudged in the rpc pipes by
40 at present, only the data section is. this may be a possible
41 cause of some of the ipc problems being experienced. lkcl26dec97
42
43 ******************************************************************/
44
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);
50
51 if(param_len < 0)
52 param_len = 0;
53
54 if(data_len < 0)
55 data_len = 0;
56
57 DEBUG(5,("copy_trans_params_and_data: params[%d..%d] data[%d..%d] (align %d)\n",
58 param_offset, param_offset + param_len,
59 data_offset , data_offset + data_len,
60 align));
61
62 *copy_into = '\0';
63
64 copy_into += 1;
65
66 if (param_len)
67 memcpy(copy_into, &rparam[param_offset], param_len);
68
69 copy_into += param_len;
70 if (align) {
71 memset(copy_into, '\0', align);
72 }
73
74 copy_into += align;
75
76 if (data_len )
77 memcpy(copy_into, &rdata[data_offset], data_len);
78 }
79
80 /****************************************************************************
81 Send a trans reply.
82 ****************************************************************************/
83
84 void send_trans_reply(connection_struct *conn,
85 struct smb_request *req,
86 char *rparam, int rparam_len,
87 char *rdata, int rdata_len,
88 bool buffer_too_large)
89 {
90 int this_ldata,this_lparam;
91 int tot_data_sent = 0;
92 int tot_param_sent = 0;
93 int align;
94
95 int ldata = rdata ? rdata_len : 0;
96 int lparam = rparam ? rparam_len : 0;
97
98 if (buffer_too_large)
99 DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
100
101 this_lparam = MIN(lparam,max_send - 500); /* hack */
102 this_ldata = MIN(ldata,max_send - (500+this_lparam));
103
104 align = ((this_lparam)%4);
105
106 reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
107
108 /*
109 * We might have SMBtranss in req which was transferred to the outbuf,
110 * fix that.
111 */
112 SCVAL(req->outbuf, smb_com, SMBtrans);
113
114 copy_trans_params_and_data((char *)req->outbuf, align,
115 rparam, tot_param_sent, this_lparam,
116 rdata, tot_data_sent, this_ldata);
117
118 SSVAL(req->outbuf,smb_vwv0,lparam);
119 SSVAL(req->outbuf,smb_vwv1,ldata);
120 SSVAL(req->outbuf,smb_vwv3,this_lparam);
121 SSVAL(req->outbuf,smb_vwv4,
122 smb_offset(smb_buf(req->outbuf)+1, req->outbuf));
123 SSVAL(req->outbuf,smb_vwv5,0);
124 SSVAL(req->outbuf,smb_vwv6,this_ldata);
125 SSVAL(req->outbuf,smb_vwv7,
126 smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
127 req->outbuf));
128 SSVAL(req->outbuf,smb_vwv8,0);
129 SSVAL(req->outbuf,smb_vwv9,0);
130
131 if (buffer_too_large) {
132 error_packet_set((char *)req->outbuf, ERRDOS, ERRmoredata,
133 STATUS_BUFFER_OVERFLOW, __LINE__, __FILE__);
134 }
135
136 show_msg((char *)req->outbuf);
137 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
138 IS_CONN_ENCRYPTED(conn))) {
139 exit_server_cleanly("send_trans_reply: srv_send_smb failed.");
140 }
141
142 TALLOC_FREE(req->outbuf);
143
144 tot_data_sent = this_ldata;
145 tot_param_sent = this_lparam;
146
147 while (tot_data_sent < ldata || tot_param_sent < lparam)
148 {
149 this_lparam = MIN(lparam-tot_param_sent,
150 max_send - 500); /* hack */
151 this_ldata = MIN(ldata -tot_data_sent,
152 max_send - (500+this_lparam));
153
154 if(this_lparam < 0)
155 this_lparam = 0;
156
157 if(this_ldata < 0)
158 this_ldata = 0;
159
160 align = (this_lparam%4);
161
162 reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
163
164 /*
165 * We might have SMBtranss in req which was transferred to the
166 * outbuf, fix that.
167 */
168 SCVAL(req->outbuf, smb_com, SMBtrans);
169
170 copy_trans_params_and_data((char *)req->outbuf, align,
171 rparam, tot_param_sent, this_lparam,
172 rdata, tot_data_sent, this_ldata);
173
174 SSVAL(req->outbuf,smb_vwv3,this_lparam);
175 SSVAL(req->outbuf,smb_vwv4,
176 smb_offset(smb_buf(req->outbuf)+1,req->outbuf));
177 SSVAL(req->outbuf,smb_vwv5,tot_param_sent);
178 SSVAL(req->outbuf,smb_vwv6,this_ldata);
179 SSVAL(req->outbuf,smb_vwv7,
180 smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
181 req->outbuf));
182 SSVAL(req->outbuf,smb_vwv8,tot_data_sent);
183 SSVAL(req->outbuf,smb_vwv9,0);
184
185 if (buffer_too_large) {
186 error_packet_set((char *)req->outbuf,
187 ERRDOS, ERRmoredata,
188 STATUS_BUFFER_OVERFLOW,
189 __LINE__, __FILE__);
190 }
191
192 show_msg((char *)req->outbuf);
193 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
194 IS_CONN_ENCRYPTED(conn)))
195 exit_server_cleanly("send_trans_reply: srv_send_smb "
196 "failed.");
197
198 tot_data_sent += this_ldata;
199 tot_param_sent += this_lparam;
200 TALLOC_FREE(req->outbuf);
201 }
202 }
203
204 /****************************************************************************
205 Start the first part of an RPC reply which began with an SMBtrans request.
206 ****************************************************************************/
207
208 static void api_rpc_trans_reply(connection_struct *conn,
209 struct smb_request *req,
210 files_struct *fsp,
211 int max_trans_reply)
212 {
213 bool is_data_outstanding;
214 uint8_t *rdata = SMB_MALLOC_ARRAY(uint8_t, max_trans_reply);
215 ssize_t data_len;
216 NTSTATUS status;
217
218 if(rdata == NULL) {
219 DEBUG(0,("api_rpc_trans_reply: malloc fail.\n"));
220 reply_nterror(req, NT_STATUS_NO_MEMORY);
221 return;
222 }
223
224 status = np_read(fsp, rdata, max_trans_reply, &data_len,
225 &is_data_outstanding);
226 if (!NT_STATUS_IS_OK(status)) {
227 SAFE_FREE(rdata);
228 api_no_reply(conn,req);
229 return;
230 }
231
232 send_trans_reply(conn, req, NULL, 0, (char *)rdata, data_len,
233 is_data_outstanding);
234 SAFE_FREE(rdata);
235 return;
236 }
237
238 /****************************************************************************
239 WaitNamedPipeHandleState
240 ****************************************************************************/
241
242 static void api_WNPHS(connection_struct *conn, struct smb_request *req,
243 struct files_struct *fsp, char *param, int param_len)
244 {
245 if (!param || param_len < 2) {
246 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
247 return;
248 }
249
250 DEBUG(4,("WaitNamedPipeHandleState priority %x\n",
251 (int)SVAL(param,0)));
252
253 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
254 }
255
256
257 /****************************************************************************
258 SetNamedPipeHandleState
259 ****************************************************************************/
260
261 static void api_SNPHS(connection_struct *conn, struct smb_request *req,
262 struct files_struct *fsp, char *param, int param_len)
263 {
264 if (!param || param_len < 2) {
265 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
266 return;
267 }
268
269 DEBUG(4,("SetNamedPipeHandleState to code %x\n", (int)SVAL(param,0)));
270
271 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
272 }
273
274
275 /****************************************************************************
276 When no reply is generated, indicate unsupported.
277 ****************************************************************************/
278
279 static void api_no_reply(connection_struct *conn, struct smb_request *req)
280 {
281 char rparam[4];
282
283 /* unsupported */
284 SSVAL(rparam,0,NERR_notsupported);
285 SSVAL(rparam,2,0); /* converter word */
286
287 DEBUG(3,("Unsupported API fd command\n"));
288
289 /* now send the reply */
290 send_trans_reply(conn, req, rparam, 4, NULL, 0, False);
291
292 return;
293 }
294
295 /****************************************************************************
296 Handle remote api calls delivered to a named pipe already opened.
297 ****************************************************************************/
298
299 static void api_fd_reply(connection_struct *conn, uint16 vuid,
300 struct smb_request *req,
301 uint16 *setup, uint8_t *data, char *params,
302 int suwcnt, int tdscnt, int tpscnt,
303 int mdrcnt, int mprcnt)
304 {
305 struct files_struct *fsp;
306 int pnum;
307 int subcommand;
308 NTSTATUS status;
309
310 DEBUG(5,("api_fd_reply\n"));
311
312 /* First find out the name of this file. */
313 if (suwcnt != 2) {
314 DEBUG(0,("Unexpected named pipe transaction.\n"));
315 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
316 return;
317 }
318
319 /* Get the file handle and hence the file name. */
320 /*
321 * NB. The setup array has already been transformed
322 * via SVAL and so is in host byte order.
323 */
324 pnum = ((int)setup[1]) & 0xFFFF;
325 subcommand = ((int)setup[0]) & 0xFFFF;
326
327 fsp = file_fsp(req, pnum);
328
329 if (!fsp_is_np(fsp)) {
330 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
331 /* Win9x does this call with a unicode pipe name, not a pnum. */
332 /* Just return success for now... */
333 DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
334 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
335 return;
336 }
337
338 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
339 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
340 return;
341 }
342
343 if (vuid != fsp->vuid) {
344 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
345 "expected %d\n", pnum, vuid, fsp->vuid));
346 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
347 return;
348 }
349
350 DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n",
351 subcommand, fsp->fsp_name, pnum));
352
353 DEBUG(10, ("api_fd_reply: p:%p max_trans_reply: %d\n", fsp, mdrcnt));
354
355 switch (subcommand) {
356 case TRANSACT_DCERPCCMD: {
357 /* dce/rpc command */
358 ssize_t nwritten;
359 status = np_write(fsp, data, tdscnt, &nwritten);
360 if (!NT_STATUS_IS_OK(status)) {
361 api_no_reply(conn, req);
362 return;
363 }
364 api_rpc_trans_reply(conn, req, fsp, mdrcnt);
365 break;
366 }
367 case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
368 /* Wait Named Pipe Handle state */
369 api_WNPHS(conn, req, fsp, params, tpscnt);
370 break;
371 case TRANSACT_SETNAMEDPIPEHANDLESTATE:
372 /* Set Named Pipe Handle state */
373 api_SNPHS(conn, req, fsp, params, tpscnt);
374 break;
375 default:
376 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
377 return;
378 }
379 }
380
381 /****************************************************************************
382 Handle named pipe commands.
383 ****************************************************************************/
384
385 static void named_pipe(connection_struct *conn, uint16 vuid,
386 struct smb_request *req,
387 const char *name, uint16 *setup,
388 char *data, char *params,
389 int suwcnt, int tdscnt,int tpscnt,
390 int msrcnt, int mdrcnt, int mprcnt)
391 {
392 DEBUG(3,("named pipe command on <%s> name\n", name));
393
394 if (strequal(name,"LANMAN")) {
395 api_reply(conn, vuid, req,
396 data, params,
397 tdscnt, tpscnt,
398 mdrcnt, mprcnt);
399 return;
400 }
401
402 if (strequal(name,"WKSSVC") ||
403 strequal(name,"SRVSVC") ||
404 strequal(name,"WINREG") ||
405 strequal(name,"SAMR") ||
406 strequal(name,"LSARPC")) {
407
408 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
409
410 api_fd_reply(conn, vuid, req,
411 setup, (uint8_t *)data, params,
412 suwcnt, tdscnt, tpscnt,
413 mdrcnt, mprcnt);
414 return;
415 }
416
417 if (strlen(name) < 1) {
418 api_fd_reply(conn, vuid, req,
419 setup, (uint8_t *)data,
420 params, suwcnt, tdscnt,
421 tpscnt, mdrcnt, mprcnt);
422 return;
423 }
424
425 if (setup)
426 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
427 (int)setup[0],(int)setup[1]));
428
429 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
430 return;
431 }
432
433 static void handle_trans(connection_struct *conn, struct smb_request *req,
434 struct trans_state *state)
435 {
436 char *local_machine_name;
437 int name_offset = 0;
438
439 DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
440 state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
441 (unsigned int)state->setup_count));
442
443 /*
444 * WinCE wierdness....
445 */
446
447 local_machine_name = talloc_asprintf(state, "\\%s\\",
448 get_local_machine_name());
449
450 if (local_machine_name == NULL) {
451 reply_nterror(req, NT_STATUS_NO_MEMORY);
452 return;
453 }
454
455 if (strnequal(state->name, local_machine_name,
456 strlen(local_machine_name))) {
457 name_offset = strlen(local_machine_name)-1;
458 }
459
460 if (!strnequal(&state->name[name_offset], "\\PIPE",
461 strlen("\\PIPE"))) {
462 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
463 return;
464 }
465
466 name_offset += strlen("\\PIPE");
467
468 /* Win9x weirdness. When talking to a unicode server Win9x
469 only sends \PIPE instead of \PIPE\ */
470
471 if (state->name[name_offset] == '\\')
472 name_offset++;
473
474 DEBUG(5,("calling named_pipe\n"));
475 named_pipe(conn, state->vuid, req,
476 state->name+name_offset,
477 state->setup,state->data,
478 state->param,
479 state->setup_count,state->total_data,
480 state->total_param,
481 state->max_setup_return,
482 state->max_data_return,
483 state->max_param_return);
484
485 if (state->close_on_completion) {
486 close_cnum(conn,state->vuid);
487 req->conn = NULL;
488 }
489
490 return;
491 }
492
493 /****************************************************************************
494 Reply to a SMBtrans.
495 ****************************************************************************/
496
497 void reply_trans(struct smb_request *req)
498 {
499 connection_struct *conn = req->conn;
500 unsigned int dsoff;
501 unsigned int dscnt;
502 unsigned int psoff;
503 unsigned int pscnt;
504 struct trans_state *state;
505 NTSTATUS result;
506 unsigned int size;
507 unsigned int av_size;
508
509 START_PROFILE(SMBtrans);
510
511 if (req->wct < 14) {
512 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
513 END_PROFILE(SMBtrans);
514 return;
515 }
516
517 size = smb_len(req->inbuf) + 4;
518 av_size = smb_len(req->inbuf);
519 dsoff = SVAL(req->vwv+12, 0);
520 dscnt = SVAL(req->vwv+11, 0);
521 psoff = SVAL(req->vwv+10, 0);
522 pscnt = SVAL(req->vwv+9, 0);
523
524 result = allow_new_trans(conn->pending_trans, req->mid);
525 if (!NT_STATUS_IS_OK(result)) {
526 DEBUG(2, ("Got invalid trans request: %s\n",
527 nt_errstr(result)));
528 reply_nterror(req, result);
529 END_PROFILE(SMBtrans);
530 return;
531 }
532
533 if ((state = TALLOC_P(conn, struct trans_state)) == NULL) {
534 DEBUG(0, ("talloc failed\n"));
535 reply_nterror(req, NT_STATUS_NO_MEMORY);
536 END_PROFILE(SMBtrans);
537 return;
538 }
539
540 state->cmd = SMBtrans;
541
542 state->mid = req->mid;
543 state->vuid = req->vuid;
544 state->setup_count = CVAL(req->vwv+13, 0);
545 state->setup = NULL;
546 state->total_param = SVAL(req->vwv+0, 0);
547 state->param = NULL;
548 state->total_data = SVAL(req->vwv+1, 0);
549 state->data = NULL;
550 state->max_param_return = SVAL(req->vwv+2, 0);
551 state->max_data_return = SVAL(req->vwv+3, 0);
552 state->max_setup_return = CVAL(req->vwv+4, 0);
553 state->close_on_completion = BITSETW(req->vwv+5, 0);
554 state->one_way = BITSETW(req->vwv+5, 1);
555
556 srvstr_pull_req_talloc(state, req, &state->name, req->buf,
557 STR_TERMINATE);
558
559 if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
560 !state->name)
561 goto bad_param;
562
563 if (state->total_data) {
564 /* Can't use talloc here, the core routines do realloc on the
565 * params and data. Out of paranoia, 100 bytes too many. */
566 state->data = (char *)SMB_MALLOC(state->total_data+100);
567 if (state->data == NULL) {
568 DEBUG(0,("reply_trans: data malloc fail for %u "
569 "bytes !\n", (unsigned int)state->total_data));
570 TALLOC_FREE(state);
571 reply_nterror(req, NT_STATUS_NO_MEMORY);
572 END_PROFILE(SMBtrans);
573 return;
574 }
575 /* null-terminate the slack space */
576 memset(&state->data[state->total_data], 0, 100);
577
578 if (dscnt > state->total_data ||
579 dsoff+dscnt < dsoff) {
580 goto bad_param;
581 }
582
583 if (dsoff > av_size ||
584 dscnt > av_size ||
585 dsoff+dscnt > av_size) {
586 goto bad_param;
587 }
588
589 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
590 }
591
592 if (state->total_param) {
593 /* Can't use talloc here, the core routines do realloc on the
594 * params and data. Out of paranoia, 100 bytes too many */
595 state->param = (char *)SMB_MALLOC(state->total_param+100);
596 if (state->param == NULL) {
597 DEBUG(0,("reply_trans: param malloc fail for %u "
598 "bytes !\n", (unsigned int)state->total_param));
599 SAFE_FREE(state->data);
600 TALLOC_FREE(state);
601 reply_nterror(req, NT_STATUS_NO_MEMORY);
602 END_PROFILE(SMBtrans);
603 return;
604 }
605 /* null-terminate the slack space */
606 memset(&state->param[state->total_param], 0, 100);
607
608 if (pscnt > state->total_param ||
609 psoff+pscnt < psoff) {
610 goto bad_param;
611 }
612
613 if (psoff > av_size ||
614 pscnt > av_size ||
615 psoff+pscnt > av_size) {
616 goto bad_param;
617 }
618
619 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
620 }
621
622 state->received_data = dscnt;
623 state->received_param = pscnt;
624
625 if (state->setup_count) {
626 unsigned int i;
627 if((state->setup = TALLOC_ARRAY(
628 state, uint16, state->setup_count)) == NULL) {
629 DEBUG(0,("reply_trans: setup malloc fail for %u "
630 "bytes !\n", (unsigned int)
631 (state->setup_count * sizeof(uint16))));
632 SAFE_FREE(state->data);
633 SAFE_FREE(state->param);
634 TALLOC_FREE(state);
635 reply_nterror(req, NT_STATUS_NO_MEMORY);
636 END_PROFILE(SMBtrans);
637 return;
638 }
639 if (req->inbuf+smb_vwv14+(state->setup_count*SIZEOFWORD) >
640 req->inbuf + size)
641 goto bad_param;
642 if ((smb_vwv14+(state->setup_count*SIZEOFWORD) < smb_vwv14) ||
643 (smb_vwv14+(state->setup_count*SIZEOFWORD) <
644 (state->setup_count*SIZEOFWORD)))
645 goto bad_param;
646
647 for (i=0;i<state->setup_count;i++)
648 state->setup[i] = SVAL(req->inbuf,
649 smb_vwv14+i*SIZEOFWORD);
650 }
651
652 state->received_param = pscnt;
653
654 if ((state->received_param != state->total_param) ||
655 (state->received_data != state->total_data)) {
656 DLIST_ADD(conn->pending_trans, state);
657
658 /* We need to send an interim response then receive the rest
659 of the parameter/data bytes */
660 reply_outbuf(req, 0, 0);
661 show_msg((char *)req->outbuf);
662 END_PROFILE(SMBtrans);
663 return;
664 }
665
666 handle_trans(conn, req, state);
667
668 SAFE_FREE(state->data);
669 SAFE_FREE(state->param);
670 TALLOC_FREE(state);
671
672 END_PROFILE(SMBtrans);
673 return;
674
675 bad_param:
676
677 DEBUG(0,("reply_trans: invalid trans parameters\n"));
678 SAFE_FREE(state->data);
679 SAFE_FREE(state->param);
680 TALLOC_FREE(state);
681 END_PROFILE(SMBtrans);
682 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
683 return;
684 }
685
686 /****************************************************************************
687 Reply to a secondary SMBtrans.
688 ****************************************************************************/
689
690 void reply_transs(struct smb_request *req)
691 {
692 connection_struct *conn = req->conn;
693 unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
694 struct trans_state *state;
695 unsigned int av_size;
696
697 START_PROFILE(SMBtranss);
698
699 show_msg((char *)req->inbuf);
700
701 if (req->wct < 8) {
702 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
703 END_PROFILE(SMBtranss);
704 return;
705 }
706
707 for (state = conn->pending_trans; state != NULL;
708 state = state->next) {
709 if (state->mid == req->mid) {
710 break;
711 }
712 }
713
714 if ((state == NULL) || (state->cmd != SMBtrans)) {
715 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
716 END_PROFILE(SMBtranss);
717 return;
718 }
719
720 /* Revise total_params and total_data in case they have changed
721 * downwards */
722
723 if (SVAL(req->vwv+0, 0) < state->total_param)
724 state->total_param = SVAL(req->vwv+0, 0);
725 if (SVAL(req->vwv+1, 0) < state->total_data)
726 state->total_data = SVAL(req->vwv+1, 0);
727
728 av_size = smb_len(req->inbuf);
729
730 pcnt = SVAL(req->vwv+2, 0);
731 poff = SVAL(req->vwv+3, 0);
732 pdisp = SVAL(req->vwv+4, 0);
733
734 dcnt = SVAL(req->vwv+5, 0);
735 doff = SVAL(req->vwv+6, 0);
736 ddisp = SVAL(req->vwv+7, 0);
737
738 state->received_param += pcnt;
739 state->received_data += dcnt;
740
741 if ((state->received_data > state->total_data) ||
742 (state->received_param > state->total_param))
743 goto bad_param;
744
745 if (pcnt) {
746 if (pdisp > state->total_param ||
747 pcnt > state->total_param ||
748 pdisp+pcnt > state->total_param ||
749 pdisp+pcnt < pdisp) {
750 goto bad_param;
751 }
752
753 if (poff > av_size ||
754 pcnt > av_size ||
755 poff+pcnt > av_size ||
756 poff+pcnt < poff) {
757 goto bad_param;
758 }
759
760 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,
761 pcnt);
762 }
763
764 if (dcnt) {
765 if (ddisp > state->total_data ||
766 dcnt > state->total_data ||
767 ddisp+dcnt > state->total_data ||
768 ddisp+dcnt < ddisp) {
769 goto bad_param;
770 }
771
772 if (ddisp > av_size ||
773 dcnt > av_size ||
774 ddisp+dcnt > av_size ||
775 ddisp+dcnt < ddisp) {
776 goto bad_param;
777 }
778
779 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,
780 dcnt);
781 }
782
783 if ((state->received_param < state->total_param) ||
784 (state->received_data < state->total_data)) {
785 END_PROFILE(SMBtranss);
786 return;
787 }
788
789 handle_trans(conn, req, state);
790
791 DLIST_REMOVE(conn->pending_trans, state);
792 SAFE_FREE(state->data);
793 SAFE_FREE(state->param);
794 TALLOC_FREE(state);
795
796 END_PROFILE(SMBtranss);
797 return;
798
799 bad_param:
800
801 DEBUG(0,("reply_transs: invalid trans parameters\n"));
802 DLIST_REMOVE(conn->pending_trans, state);
803 SAFE_FREE(state->data);
804 SAFE_FREE(state->param);
805 TALLOC_FREE(state);
806 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
807 END_PROFILE(SMBtranss);
808 return;
809 }
reg import