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Move down the become_root()/unbecome_root() calls into the VFS modules
[Samba.git] / source3 / smbd / ipc.c
blob2d5713590d8ca493d6277bd54620ebcd7695e1bf
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 true, req->seqnum+1,
138 IS_CONN_ENCRYPTED(conn), &req->pcd)) {
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 true, req->seqnum+1,
195 IS_CONN_ENCRYPTED(conn), &req->pcd))
196 exit_server_cleanly("send_trans_reply: srv_send_smb "
197 "failed.");
198
199 tot_data_sent += this_ldata;
200 tot_param_sent += this_lparam;
201 TALLOC_FREE(req->outbuf);
202 }
203 }
204
205 /****************************************************************************
206 Start the first part of an RPC reply which began with an SMBtrans request.
207 ****************************************************************************/
208
209 struct dcerpc_cmd_state {
210 struct fake_file_handle *handle;
211 uint8_t *data;
212 size_t num_data;
213 size_t max_read;
214 };
215
216 static void api_dcerpc_cmd_write_done(struct tevent_req *subreq);
217 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq);
218
219 static void api_dcerpc_cmd(connection_struct *conn, struct smb_request *req,
220 files_struct *fsp, uint8_t *data, size_t length,
221 size_t max_read)
222 {
223 struct tevent_req *subreq;
224 struct dcerpc_cmd_state *state;
225
226 if (!fsp_is_np(fsp)) {
227 api_no_reply(conn, req);
228 return;
229 }
230
231 state = talloc(req, struct dcerpc_cmd_state);
232 if (state == NULL) {
233 reply_nterror(req, NT_STATUS_NO_MEMORY);
234 return;
235 }
236 req->async_priv = state;
237
238 state->handle = fsp->fake_file_handle;
239
240 /*
241 * This memdup severely sucks. But doing it properly essentially means
242 * to rewrite lanman.c, something which I don't really want to do now.
243 */
244 state->data = (uint8_t *)talloc_memdup(state, data, length);
245 if (state->data == NULL) {
246 reply_nterror(req, NT_STATUS_NO_MEMORY);
247 return;
248 }
249 state->num_data = length;
250 state->max_read = max_read;
251
252 subreq = np_write_send(state, smbd_event_context(), state->handle,
253 state->data, length);
254 if (subreq == NULL) {
255 TALLOC_FREE(state);
256 reply_nterror(req, NT_STATUS_NO_MEMORY);
257 return;
258 }
259 tevent_req_set_callback(subreq, api_dcerpc_cmd_write_done,
260 talloc_move(conn, &req));
261 }
262
263 static void api_dcerpc_cmd_write_done(struct tevent_req *subreq)
264 {
265 struct smb_request *req = tevent_req_callback_data(
266 subreq, struct smb_request);
267 struct dcerpc_cmd_state *state = talloc_get_type_abort(
268 req->async_priv, struct dcerpc_cmd_state);
269 NTSTATUS status;
270 ssize_t nwritten = -1;
271
272 status = np_write_recv(subreq, &nwritten);
273 TALLOC_FREE(subreq);
274 if (!NT_STATUS_IS_OK(status) || (nwritten != state->num_data)) {
275 DEBUG(10, ("Could not write to pipe: %s (%d/%d)\n",
276 nt_errstr(status), (int)state->num_data,
277 (int)nwritten));
278 reply_nterror(req, NT_STATUS_PIPE_NOT_AVAILABLE);
279 goto send;
280 }
281
282 state->data = TALLOC_REALLOC_ARRAY(state, state->data, uint8_t,
283 state->max_read);
284 if (state->data == NULL) {
285 reply_nterror(req, NT_STATUS_NO_MEMORY);
286 goto send;
287 }
288
289 subreq = np_read_send(req->conn, smbd_event_context(),
290 state->handle, state->data, state->max_read);
291 if (subreq == NULL) {
292 reply_nterror(req, NT_STATUS_NO_MEMORY);
293 goto send;
294 }
295 tevent_req_set_callback(subreq, api_dcerpc_cmd_read_done, req);
296 return;
297
298 send:
299 if (!srv_send_smb(
300 smbd_server_fd(), (char *)req->outbuf,
301 true, req->seqnum+1,
302 IS_CONN_ENCRYPTED(req->conn) || req->encrypted,
303 &req->pcd)) {
304 exit_server_cleanly("construct_reply: srv_send_smb failed.");
305 }
306 TALLOC_FREE(req);
307 }
308
309 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq)
310 {
311 struct smb_request *req = tevent_req_callback_data(
312 subreq, struct smb_request);
313 struct dcerpc_cmd_state *state = talloc_get_type_abort(
314 req->async_priv, struct dcerpc_cmd_state);
315 NTSTATUS status;
316 ssize_t nread;
317 bool is_data_outstanding;
318
319 status = np_read_recv(subreq, &nread, &is_data_outstanding);
320 TALLOC_FREE(subreq);
321
322 if (!NT_STATUS_IS_OK(status)) {
323 DEBUG(10, ("Could not read from to pipe: %s\n",
324 nt_errstr(status)));
325 reply_nterror(req, status);
326
327 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
328 true, req->seqnum+1,
329 IS_CONN_ENCRYPTED(req->conn)
330 ||req->encrypted, &req->pcd)) {
331 exit_server_cleanly("construct_reply: srv_send_smb "
332 "failed.");
333 }
334 TALLOC_FREE(req);
335 return;
336 }
337
338 send_trans_reply(req->conn, req, NULL, 0, (char *)state->data, nread,
339 is_data_outstanding);
340 TALLOC_FREE(req);
341 }
342
343 /****************************************************************************
344 WaitNamedPipeHandleState
345 ****************************************************************************/
346
347 static void api_WNPHS(connection_struct *conn, struct smb_request *req,
348 struct files_struct *fsp, char *param, int param_len)
349 {
350 if (!param || param_len < 2) {
351 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
352 return;
353 }
354
355 DEBUG(4,("WaitNamedPipeHandleState priority %x\n",
356 (int)SVAL(param,0)));
357
358 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
359 }
360
361
362 /****************************************************************************
363 SetNamedPipeHandleState
364 ****************************************************************************/
365
366 static void api_SNPHS(connection_struct *conn, struct smb_request *req,
367 struct files_struct *fsp, char *param, int param_len)
368 {
369 if (!param || param_len < 2) {
370 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
371 return;
372 }
373
374 DEBUG(4,("SetNamedPipeHandleState to code %x\n", (int)SVAL(param,0)));
375
376 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
377 }
378
379
380 /****************************************************************************
381 When no reply is generated, indicate unsupported.
382 ****************************************************************************/
383
384 static void api_no_reply(connection_struct *conn, struct smb_request *req)
385 {
386 char rparam[4];
387
388 /* unsupported */
389 SSVAL(rparam,0,NERR_notsupported);
390 SSVAL(rparam,2,0); /* converter word */
391
392 DEBUG(3,("Unsupported API fd command\n"));
393
394 /* now send the reply */
395 send_trans_reply(conn, req, rparam, 4, NULL, 0, False);
396
397 return;
398 }
399
400 /****************************************************************************
401 Handle remote api calls delivered to a named pipe already opened.
402 ****************************************************************************/
403
404 static void api_fd_reply(connection_struct *conn, uint16 vuid,
405 struct smb_request *req,
406 uint16 *setup, uint8_t *data, char *params,
407 int suwcnt, int tdscnt, int tpscnt,
408 int mdrcnt, int mprcnt)
409 {
410 struct files_struct *fsp;
411 int pnum;
412 int subcommand;
413
414 DEBUG(5,("api_fd_reply\n"));
415
416 /* First find out the name of this file. */
417 if (suwcnt != 2) {
418 DEBUG(0,("Unexpected named pipe transaction.\n"));
419 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
420 return;
421 }
422
423 /* Get the file handle and hence the file name. */
424 /*
425 * NB. The setup array has already been transformed
426 * via SVAL and so is in host byte order.
427 */
428 pnum = ((int)setup[1]) & 0xFFFF;
429 subcommand = ((int)setup[0]) & 0xFFFF;
430
431 fsp = file_fsp(req, pnum);
432
433 if (!fsp_is_np(fsp)) {
434 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
435 /* Win9x does this call with a unicode pipe name, not a pnum. */
436 /* Just return success for now... */
437 DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
438 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
439 return;
440 }
441
442 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
443 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
444 return;
445 }
446
447 if (vuid != fsp->vuid) {
448 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
449 "expected %d\n", pnum, vuid, fsp->vuid));
450 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
451 return;
452 }
453
454 DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n",
455 subcommand, fsp->fsp_name, pnum));
456
457 DEBUG(10, ("api_fd_reply: p:%p max_trans_reply: %d\n", fsp, mdrcnt));
458
459 switch (subcommand) {
460 case TRANSACT_DCERPCCMD: {
461 /* dce/rpc command */
462 api_dcerpc_cmd(conn, req, fsp, (uint8_t *)data, tdscnt,
463 mdrcnt);
464 break;
465 }
466 case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
467 /* Wait Named Pipe Handle state */
468 api_WNPHS(conn, req, fsp, params, tpscnt);
469 break;
470 case TRANSACT_SETNAMEDPIPEHANDLESTATE:
471 /* Set Named Pipe Handle state */
472 api_SNPHS(conn, req, fsp, params, tpscnt);
473 break;
474 default:
475 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
476 return;
477 }
478 }
479
480 /****************************************************************************
481 Handle named pipe commands.
482 ****************************************************************************/
483
484 static void named_pipe(connection_struct *conn, uint16 vuid,
485 struct smb_request *req,
486 const char *name, uint16 *setup,
487 char *data, char *params,
488 int suwcnt, int tdscnt,int tpscnt,
489 int msrcnt, int mdrcnt, int mprcnt)
490 {
491 DEBUG(3,("named pipe command on <%s> name\n", name));
492
493 if (strequal(name,"LANMAN")) {
494 api_reply(conn, vuid, req,
495 data, params,
496 tdscnt, tpscnt,
497 mdrcnt, mprcnt);
498 return;
499 }
500
501 if (strequal(name,"WKSSVC") ||
502 strequal(name,"SRVSVC") ||
503 strequal(name,"WINREG") ||
504 strequal(name,"SAMR") ||
505 strequal(name,"LSARPC")) {
506
507 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
508
509 api_fd_reply(conn, vuid, req,
510 setup, (uint8_t *)data, params,
511 suwcnt, tdscnt, tpscnt,
512 mdrcnt, mprcnt);
513 return;
514 }
515
516 if (strlen(name) < 1) {
517 api_fd_reply(conn, vuid, req,
518 setup, (uint8_t *)data,
519 params, suwcnt, tdscnt,
520 tpscnt, mdrcnt, mprcnt);
521 return;
522 }
523
524 if (setup)
525 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
526 (int)setup[0],(int)setup[1]));
527
528 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
529 return;
530 }
531
532 static void handle_trans(connection_struct *conn, struct smb_request *req,
533 struct trans_state *state)
534 {
535 char *local_machine_name;
536 int name_offset = 0;
537
538 DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
539 state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
540 (unsigned int)state->setup_count));
541
542 /*
543 * WinCE wierdness....
544 */
545
546 local_machine_name = talloc_asprintf(state, "\\%s\\",
547 get_local_machine_name());
548
549 if (local_machine_name == NULL) {
550 reply_nterror(req, NT_STATUS_NO_MEMORY);
551 return;
552 }
553
554 if (strnequal(state->name, local_machine_name,
555 strlen(local_machine_name))) {
556 name_offset = strlen(local_machine_name)-1;
557 }
558
559 if (!strnequal(&state->name[name_offset], "\\PIPE",
560 strlen("\\PIPE"))) {
561 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
562 return;
563 }
564
565 name_offset += strlen("\\PIPE");
566
567 /* Win9x weirdness. When talking to a unicode server Win9x
568 only sends \PIPE instead of \PIPE\ */
569
570 if (state->name[name_offset] == '\\')
571 name_offset++;
572
573 DEBUG(5,("calling named_pipe\n"));
574 named_pipe(conn, state->vuid, req,
575 state->name+name_offset,
576 state->setup,state->data,
577 state->param,
578 state->setup_count,state->total_data,
579 state->total_param,
580 state->max_setup_return,
581 state->max_data_return,
582 state->max_param_return);
583
584 if (state->close_on_completion) {
585 close_cnum(conn,state->vuid);
586 req->conn = NULL;
587 }
588
589 return;
590 }
591
592 /****************************************************************************
593 Reply to a SMBtrans.
594 ****************************************************************************/
595
596 void reply_trans(struct smb_request *req)
597 {
598 connection_struct *conn = req->conn;
599 unsigned int dsoff;
600 unsigned int dscnt;
601 unsigned int psoff;
602 unsigned int pscnt;
603 struct trans_state *state;
604 NTSTATUS result;
605
606 START_PROFILE(SMBtrans);
607
608 if (req->wct < 14) {
609 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
610 END_PROFILE(SMBtrans);
611 return;
612 }
613
614 dsoff = SVAL(req->vwv+12, 0);
615 dscnt = SVAL(req->vwv+11, 0);
616 psoff = SVAL(req->vwv+10, 0);
617 pscnt = SVAL(req->vwv+9, 0);
618
619 result = allow_new_trans(conn->pending_trans, req->mid);
620 if (!NT_STATUS_IS_OK(result)) {
621 DEBUG(2, ("Got invalid trans request: %s\n",
622 nt_errstr(result)));
623 reply_nterror(req, result);
624 END_PROFILE(SMBtrans);
625 return;
626 }
627
628 if ((state = TALLOC_P(conn, struct trans_state)) == NULL) {
629 DEBUG(0, ("talloc failed\n"));
630 reply_nterror(req, NT_STATUS_NO_MEMORY);
631 END_PROFILE(SMBtrans);
632 return;
633 }
634
635 state->cmd = SMBtrans;
636
637 state->mid = req->mid;
638 state->vuid = req->vuid;
639 state->setup_count = CVAL(req->vwv+13, 0);
640 state->setup = NULL;
641 state->total_param = SVAL(req->vwv+0, 0);
642 state->param = NULL;
643 state->total_data = SVAL(req->vwv+1, 0);
644 state->data = NULL;
645 state->max_param_return = SVAL(req->vwv+2, 0);
646 state->max_data_return = SVAL(req->vwv+3, 0);
647 state->max_setup_return = CVAL(req->vwv+4, 0);
648 state->close_on_completion = BITSETW(req->vwv+5, 0);
649 state->one_way = BITSETW(req->vwv+5, 1);
650
651 srvstr_pull_req_talloc(state, req, &state->name, req->buf,
652 STR_TERMINATE);
653
654 if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
655 !state->name)
656 goto bad_param;
657
658 if (state->total_data) {
659
660 if (trans_oob(state->total_data, 0, dscnt)
661 || trans_oob(smb_len(req->inbuf), dsoff, dscnt)) {
662 goto bad_param;
663 }
664
665 /* Can't use talloc here, the core routines do realloc on the
666 * params and data. Out of paranoia, 100 bytes too many. */
667 state->data = (char *)SMB_MALLOC(state->total_data+100);
668 if (state->data == NULL) {
669 DEBUG(0,("reply_trans: data malloc fail for %u "
670 "bytes !\n", (unsigned int)state->total_data));
671 TALLOC_FREE(state);
672 reply_nterror(req, NT_STATUS_NO_MEMORY);
673 END_PROFILE(SMBtrans);
674 return;
675 }
676 /* null-terminate the slack space */
677 memset(&state->data[state->total_data], 0, 100);
678
679 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
680 }
681
682 if (state->total_param) {
683
684 if (trans_oob(state->total_param, 0, pscnt)
685 || trans_oob(smb_len(req->inbuf), psoff, pscnt)) {
686 goto bad_param;
687 }
688
689 /* Can't use talloc here, the core routines do realloc on the
690 * params and data. Out of paranoia, 100 bytes too many */
691 state->param = (char *)SMB_MALLOC(state->total_param+100);
692 if (state->param == NULL) {
693 DEBUG(0,("reply_trans: param malloc fail for %u "
694 "bytes !\n", (unsigned int)state->total_param));
695 SAFE_FREE(state->data);
696 TALLOC_FREE(state);
697 reply_nterror(req, NT_STATUS_NO_MEMORY);
698 END_PROFILE(SMBtrans);
699 return;
700 }
701 /* null-terminate the slack space */
702 memset(&state->param[state->total_param], 0, 100);
703
704 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
705 }
706
707 state->received_data = dscnt;
708 state->received_param = pscnt;
709
710 if (state->setup_count) {
711 unsigned int i;
712
713 /*
714 * No overflow possible here, state->setup_count is an
715 * unsigned int, being filled by a single byte from
716 * CVAL(req->vwv+13, 0) above. The cast in the comparison
717 * below is not necessary, it's here to clarify things. The
718 * validity of req->vwv and req->wct has been checked in
719 * init_smb_request already.
720 */
721 if (state->setup_count + 14 > (unsigned int)req->wct) {
722 goto bad_param;
723 }
724
725 if((state->setup = TALLOC_ARRAY(
726 state, uint16, state->setup_count)) == NULL) {
727 DEBUG(0,("reply_trans: setup malloc fail for %u "
728 "bytes !\n", (unsigned int)
729 (state->setup_count * sizeof(uint16))));
730 SAFE_FREE(state->data);
731 SAFE_FREE(state->param);
732 TALLOC_FREE(state);
733 reply_nterror(req, NT_STATUS_NO_MEMORY);
734 END_PROFILE(SMBtrans);
735 return;
736 }
737
738 for (i=0;i<state->setup_count;i++) {
739 state->setup[i] = SVAL(req->vwv + 14 + i, 0);
740 }
741 }
742
743 state->received_param = pscnt;
744
745 if ((state->received_param != state->total_param) ||
746 (state->received_data != state->total_data)) {
747 DLIST_ADD(conn->pending_trans, state);
748
749 /* We need to send an interim response then receive the rest
750 of the parameter/data bytes */
751 reply_outbuf(req, 0, 0);
752 show_msg((char *)req->outbuf);
753 END_PROFILE(SMBtrans);
754 return;
755 }
756
757 talloc_steal(talloc_tos(), state);
758
759 handle_trans(conn, req, state);
760
761 SAFE_FREE(state->data);
762 SAFE_FREE(state->param);
763 TALLOC_FREE(state);
764
765 END_PROFILE(SMBtrans);
766 return;
767
768 bad_param:
769
770 DEBUG(0,("reply_trans: invalid trans parameters\n"));
771 SAFE_FREE(state->data);
772 SAFE_FREE(state->param);
773 TALLOC_FREE(state);
774 END_PROFILE(SMBtrans);
775 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
776 return;
777 }
778
779 /****************************************************************************
780 Reply to a secondary SMBtrans.
781 ****************************************************************************/
782
783 void reply_transs(struct smb_request *req)
784 {
785 connection_struct *conn = req->conn;
786 unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
787 struct trans_state *state;
788
789 START_PROFILE(SMBtranss);
790
791 show_msg((char *)req->inbuf);
792
793 if (req->wct < 8) {
794 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
795 END_PROFILE(SMBtranss);
796 return;
797 }
798
799 for (state = conn->pending_trans; state != NULL;
800 state = state->next) {
801 if (state->mid == req->mid) {
802 break;
803 }
804 }
805
806 if ((state == NULL) || (state->cmd != SMBtrans)) {
807 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
808 END_PROFILE(SMBtranss);
809 return;
810 }
811
812 /* Revise total_params and total_data in case they have changed
813 * downwards */
814
815 if (SVAL(req->vwv+0, 0) < state->total_param)
816 state->total_param = SVAL(req->vwv+0, 0);
817 if (SVAL(req->vwv+1, 0) < state->total_data)
818 state->total_data = SVAL(req->vwv+1, 0);
819
820 pcnt = SVAL(req->vwv+2, 0);
821 poff = SVAL(req->vwv+3, 0);
822 pdisp = SVAL(req->vwv+4, 0);
823
824 dcnt = SVAL(req->vwv+5, 0);
825 doff = SVAL(req->vwv+6, 0);
826 ddisp = SVAL(req->vwv+7, 0);
827
828 state->received_param += pcnt;
829 state->received_data += dcnt;
830
831 if ((state->received_data > state->total_data) ||
832 (state->received_param > state->total_param))
833 goto bad_param;
834
835 if (pcnt) {
836 if (trans_oob(state->total_param, pdisp, pcnt)
837 || trans_oob(smb_len(req->inbuf), poff, pcnt)) {
838 goto bad_param;
839 }
840 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,pcnt);
841 }
842
843 if (dcnt) {
844 if (trans_oob(state->total_data, ddisp, dcnt)
845 || trans_oob(smb_len(req->inbuf), doff, dcnt)) {
846 goto bad_param;
847 }
848 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,dcnt);
849 }
850
851 if ((state->received_param < state->total_param) ||
852 (state->received_data < state->total_data)) {
853 END_PROFILE(SMBtranss);
854 return;
855 }
856
857 talloc_steal(talloc_tos(), state);
858
859 handle_trans(conn, req, state);
860
861 DLIST_REMOVE(conn->pending_trans, state);
862 SAFE_FREE(state->data);
863 SAFE_FREE(state->param);
864 TALLOC_FREE(state);
865
866 END_PROFILE(SMBtranss);
867 return;
868
869 bad_param:
870
871 DEBUG(0,("reply_transs: invalid trans parameters\n"));
872 DLIST_REMOVE(conn->pending_trans, state);
873 SAFE_FREE(state->data);
874 SAFE_FREE(state->param);
875 TALLOC_FREE(state);
876 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
877 END_PROFILE(SMBtranss);
878 return;
879 }
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