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[Samba/gebeck_regimport.git] / source3 / smbd / ipc.c
blobbeb802859b13d4f229e6deef71220b6c773e1865
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 struct smbd_server_connection *sconn = req->sconn;
97 int max_send = sconn->smb1.sessions.max_send;
98
99 if (buffer_too_large)
100 DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
101
102 this_lparam = MIN(lparam,max_send - 500); /* hack */
103 this_ldata = MIN(ldata,max_send - (500+this_lparam));
104
105 align = ((this_lparam)%4);
106
107 reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
108
109 /*
110 * We might have SMBtranss in req which was transferred to the outbuf,
111 * fix that.
112 */
113 SCVAL(req->outbuf, smb_com, SMBtrans);
114
115 copy_trans_params_and_data((char *)req->outbuf, align,
116 rparam, tot_param_sent, this_lparam,
117 rdata, tot_data_sent, this_ldata);
118
119 SSVAL(req->outbuf,smb_vwv0,lparam);
120 SSVAL(req->outbuf,smb_vwv1,ldata);
121 SSVAL(req->outbuf,smb_vwv3,this_lparam);
122 SSVAL(req->outbuf,smb_vwv4,
123 smb_offset(smb_buf(req->outbuf)+1, req->outbuf));
124 SSVAL(req->outbuf,smb_vwv5,0);
125 SSVAL(req->outbuf,smb_vwv6,this_ldata);
126 SSVAL(req->outbuf,smb_vwv7,
127 smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
128 req->outbuf));
129 SSVAL(req->outbuf,smb_vwv8,0);
130 SSVAL(req->outbuf,smb_vwv9,0);
131
132 if (buffer_too_large) {
133 error_packet_set((char *)req->outbuf, ERRDOS, ERRmoredata,
134 STATUS_BUFFER_OVERFLOW, __LINE__, __FILE__);
135 }
136
137 show_msg((char *)req->outbuf);
138 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
139 true, req->seqnum+1,
140 IS_CONN_ENCRYPTED(conn), &req->pcd)) {
141 exit_server_cleanly("send_trans_reply: srv_send_smb failed.");
142 }
143
144 TALLOC_FREE(req->outbuf);
145
146 tot_data_sent = this_ldata;
147 tot_param_sent = this_lparam;
148
149 while (tot_data_sent < ldata || tot_param_sent < lparam)
150 {
151 this_lparam = MIN(lparam-tot_param_sent,
152 max_send - 500); /* hack */
153 this_ldata = MIN(ldata -tot_data_sent,
154 max_send - (500+this_lparam));
155
156 if(this_lparam < 0)
157 this_lparam = 0;
158
159 if(this_ldata < 0)
160 this_ldata = 0;
161
162 align = (this_lparam%4);
163
164 reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
165
166 /*
167 * We might have SMBtranss in req which was transferred to the
168 * outbuf, fix that.
169 */
170 SCVAL(req->outbuf, smb_com, SMBtrans);
171
172 copy_trans_params_and_data((char *)req->outbuf, align,
173 rparam, tot_param_sent, this_lparam,
174 rdata, tot_data_sent, this_ldata);
175
176 SSVAL(req->outbuf,smb_vwv0,lparam);
177 SSVAL(req->outbuf,smb_vwv1,ldata);
178
179 SSVAL(req->outbuf,smb_vwv3,this_lparam);
180 SSVAL(req->outbuf,smb_vwv4,
181 smb_offset(smb_buf(req->outbuf)+1,req->outbuf));
182 SSVAL(req->outbuf,smb_vwv5,tot_param_sent);
183 SSVAL(req->outbuf,smb_vwv6,this_ldata);
184 SSVAL(req->outbuf,smb_vwv7,
185 smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
186 req->outbuf));
187 SSVAL(req->outbuf,smb_vwv8,tot_data_sent);
188 SSVAL(req->outbuf,smb_vwv9,0);
189
190 if (buffer_too_large) {
191 error_packet_set((char *)req->outbuf,
192 ERRDOS, ERRmoredata,
193 STATUS_BUFFER_OVERFLOW,
194 __LINE__, __FILE__);
195 }
196
197 show_msg((char *)req->outbuf);
198 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
199 true, req->seqnum+1,
200 IS_CONN_ENCRYPTED(conn), &req->pcd))
201 exit_server_cleanly("send_trans_reply: srv_send_smb "
202 "failed.");
203
204 tot_data_sent += this_ldata;
205 tot_param_sent += this_lparam;
206 TALLOC_FREE(req->outbuf);
207 }
208 }
209
210 /****************************************************************************
211 Start the first part of an RPC reply which began with an SMBtrans request.
212 ****************************************************************************/
213
214 struct dcerpc_cmd_state {
215 struct fake_file_handle *handle;
216 uint8_t *data;
217 size_t num_data;
218 size_t max_read;
219 };
220
221 static void api_dcerpc_cmd_write_done(struct tevent_req *subreq);
222 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq);
223
224 static void api_dcerpc_cmd(connection_struct *conn, struct smb_request *req,
225 files_struct *fsp, uint8_t *data, size_t length,
226 size_t max_read)
227 {
228 struct tevent_req *subreq;
229 struct dcerpc_cmd_state *state;
230 bool busy;
231
232 if (!fsp_is_np(fsp)) {
233 api_no_reply(conn, req);
234 return;
235 }
236
237 /*
238 * Trans requests are only allowed
239 * if no other Trans or Read is active
240 */
241 busy = np_read_in_progress(fsp->fake_file_handle);
242 if (busy) {
243 reply_nterror(req, NT_STATUS_PIPE_BUSY);
244 return;
245 }
246
247 state = talloc(req, struct dcerpc_cmd_state);
248 if (state == NULL) {
249 reply_nterror(req, NT_STATUS_NO_MEMORY);
250 return;
251 }
252 req->async_priv = state;
253
254 state->handle = fsp->fake_file_handle;
255
256 /*
257 * This memdup severely sucks. But doing it properly essentially means
258 * to rewrite lanman.c, something which I don't really want to do now.
259 */
260 state->data = (uint8_t *)talloc_memdup(state, data, length);
261 if (state->data == NULL) {
262 reply_nterror(req, NT_STATUS_NO_MEMORY);
263 return;
264 }
265 state->num_data = length;
266 state->max_read = max_read;
267
268 subreq = np_write_send(state, smbd_event_context(), state->handle,
269 state->data, length);
270 if (subreq == NULL) {
271 TALLOC_FREE(state);
272 reply_nterror(req, NT_STATUS_NO_MEMORY);
273 return;
274 }
275 tevent_req_set_callback(subreq, api_dcerpc_cmd_write_done,
276 talloc_move(conn, &req));
277 }
278
279 static void api_dcerpc_cmd_write_done(struct tevent_req *subreq)
280 {
281 struct smb_request *req = tevent_req_callback_data(
282 subreq, struct smb_request);
283 struct dcerpc_cmd_state *state = talloc_get_type_abort(
284 req->async_priv, struct dcerpc_cmd_state);
285 NTSTATUS status;
286 ssize_t nwritten = -1;
287
288 status = np_write_recv(subreq, &nwritten);
289 TALLOC_FREE(subreq);
290 if (!NT_STATUS_IS_OK(status) || (nwritten != state->num_data)) {
291 DEBUG(10, ("Could not write to pipe: %s (%d/%d)\n",
292 nt_errstr(status), (int)state->num_data,
293 (int)nwritten));
294 reply_nterror(req, NT_STATUS_PIPE_NOT_AVAILABLE);
295 goto send;
296 }
297
298 state->data = TALLOC_REALLOC_ARRAY(state, state->data, uint8_t,
299 state->max_read);
300 if (state->data == NULL) {
301 reply_nterror(req, NT_STATUS_NO_MEMORY);
302 goto send;
303 }
304
305 subreq = np_read_send(req->conn, smbd_event_context(),
306 state->handle, state->data, state->max_read);
307 if (subreq == NULL) {
308 reply_nterror(req, NT_STATUS_NO_MEMORY);
309 goto send;
310 }
311 tevent_req_set_callback(subreq, api_dcerpc_cmd_read_done, req);
312 return;
313
314 send:
315 if (!srv_send_smb(
316 smbd_server_fd(), (char *)req->outbuf,
317 true, req->seqnum+1,
318 IS_CONN_ENCRYPTED(req->conn) || req->encrypted,
319 &req->pcd)) {
320 exit_server_cleanly("construct_reply: srv_send_smb failed.");
321 }
322 TALLOC_FREE(req);
323 }
324
325 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq)
326 {
327 struct smb_request *req = tevent_req_callback_data(
328 subreq, struct smb_request);
329 struct dcerpc_cmd_state *state = talloc_get_type_abort(
330 req->async_priv, struct dcerpc_cmd_state);
331 NTSTATUS status;
332 ssize_t nread;
333 bool is_data_outstanding;
334
335 status = np_read_recv(subreq, &nread, &is_data_outstanding);
336 TALLOC_FREE(subreq);
337
338 if (!NT_STATUS_IS_OK(status)) {
339 DEBUG(10, ("Could not read from to pipe: %s\n",
340 nt_errstr(status)));
341 reply_nterror(req, status);
342
343 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
344 true, req->seqnum+1,
345 IS_CONN_ENCRYPTED(req->conn)
346 ||req->encrypted, &req->pcd)) {
347 exit_server_cleanly("construct_reply: srv_send_smb "
348 "failed.");
349 }
350 TALLOC_FREE(req);
351 return;
352 }
353
354 send_trans_reply(req->conn, req, NULL, 0, (char *)state->data, nread,
355 is_data_outstanding);
356 TALLOC_FREE(req);
357 }
358
359 /****************************************************************************
360 WaitNamedPipeHandleState
361 ****************************************************************************/
362
363 static void api_WNPHS(connection_struct *conn, struct smb_request *req,
364 struct files_struct *fsp, char *param, int param_len)
365 {
366 if (!param || param_len < 2) {
367 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
368 return;
369 }
370
371 DEBUG(4,("WaitNamedPipeHandleState priority %x\n",
372 (int)SVAL(param,0)));
373
374 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
375 }
376
377
378 /****************************************************************************
379 SetNamedPipeHandleState
380 ****************************************************************************/
381
382 static void api_SNPHS(connection_struct *conn, struct smb_request *req,
383 struct files_struct *fsp, char *param, int param_len)
384 {
385 if (!param || param_len < 2) {
386 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
387 return;
388 }
389
390 DEBUG(4,("SetNamedPipeHandleState to code %x\n", (int)SVAL(param,0)));
391
392 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
393 }
394
395
396 /****************************************************************************
397 When no reply is generated, indicate unsupported.
398 ****************************************************************************/
399
400 static void api_no_reply(connection_struct *conn, struct smb_request *req)
401 {
402 char rparam[4];
403
404 /* unsupported */
405 SSVAL(rparam,0,NERR_notsupported);
406 SSVAL(rparam,2,0); /* converter word */
407
408 DEBUG(3,("Unsupported API fd command\n"));
409
410 /* now send the reply */
411 send_trans_reply(conn, req, rparam, 4, NULL, 0, False);
412
413 return;
414 }
415
416 /****************************************************************************
417 Handle remote api calls delivered to a named pipe already opened.
418 ****************************************************************************/
419
420 static void api_fd_reply(connection_struct *conn, uint16 vuid,
421 struct smb_request *req,
422 uint16 *setup, uint8_t *data, char *params,
423 int suwcnt, int tdscnt, int tpscnt,
424 int mdrcnt, int mprcnt)
425 {
426 struct files_struct *fsp;
427 int pnum;
428 int subcommand;
429
430 DEBUG(5,("api_fd_reply\n"));
431
432 /* First find out the name of this file. */
433 if (suwcnt != 2) {
434 DEBUG(0,("Unexpected named pipe transaction.\n"));
435 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
436 return;
437 }
438
439 /* Get the file handle and hence the file name. */
440 /*
441 * NB. The setup array has already been transformed
442 * via SVAL and so is in host byte order.
443 */
444 pnum = ((int)setup[1]) & 0xFFFF;
445 subcommand = ((int)setup[0]) & 0xFFFF;
446
447 fsp = file_fsp(req, pnum);
448
449 if (!fsp_is_np(fsp)) {
450 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
451 /* Win9x does this call with a unicode pipe name, not a pnum. */
452 /* Just return success for now... */
453 DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
454 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
455 return;
456 }
457
458 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
459 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
460 return;
461 }
462
463 if (vuid != fsp->vuid) {
464 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
465 "expected %d\n", pnum, vuid, fsp->vuid));
466 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
467 return;
468 }
469
470 DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n",
471 subcommand, fsp_str_dbg(fsp), pnum));
472
473 DEBUG(10, ("api_fd_reply: p:%p max_trans_reply: %d\n", fsp, mdrcnt));
474
475 switch (subcommand) {
476 case TRANSACT_DCERPCCMD: {
477 /* dce/rpc command */
478 api_dcerpc_cmd(conn, req, fsp, (uint8_t *)data, tdscnt,
479 mdrcnt);
480 break;
481 }
482 case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
483 /* Wait Named Pipe Handle state */
484 api_WNPHS(conn, req, fsp, params, tpscnt);
485 break;
486 case TRANSACT_SETNAMEDPIPEHANDLESTATE:
487 /* Set Named Pipe Handle state */
488 api_SNPHS(conn, req, fsp, params, tpscnt);
489 break;
490 default:
491 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
492 return;
493 }
494 }
495
496 /****************************************************************************
497 Handle named pipe commands.
498 ****************************************************************************/
499
500 static void named_pipe(connection_struct *conn, uint16 vuid,
501 struct smb_request *req,
502 const char *name, uint16 *setup,
503 char *data, char *params,
504 int suwcnt, int tdscnt,int tpscnt,
505 int msrcnt, int mdrcnt, int mprcnt)
506 {
507 DEBUG(3,("named pipe command on <%s> name\n", name));
508
509 if (strequal(name,"LANMAN")) {
510 api_reply(conn, vuid, req,
511 data, params,
512 tdscnt, tpscnt,
513 mdrcnt, mprcnt);
514 return;
515 }
516
517 if (strequal(name,"WKSSVC") ||
518 strequal(name,"SRVSVC") ||
519 strequal(name,"WINREG") ||
520 strequal(name,"SAMR") ||
521 strequal(name,"LSARPC")) {
522
523 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
524
525 api_fd_reply(conn, vuid, req,
526 setup, (uint8_t *)data, params,
527 suwcnt, tdscnt, tpscnt,
528 mdrcnt, mprcnt);
529 return;
530 }
531
532 if (strlen(name) < 1) {
533 api_fd_reply(conn, vuid, req,
534 setup, (uint8_t *)data,
535 params, suwcnt, tdscnt,
536 tpscnt, mdrcnt, mprcnt);
537 return;
538 }
539
540 if (setup)
541 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
542 (int)setup[0],(int)setup[1]));
543
544 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
545 return;
546 }
547
548 static void handle_trans(connection_struct *conn, struct smb_request *req,
549 struct trans_state *state)
550 {
551 char *local_machine_name;
552 int name_offset = 0;
553
554 DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
555 state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
556 (unsigned int)state->setup_count));
557
558 /*
559 * WinCE wierdness....
560 */
561
562 local_machine_name = talloc_asprintf(state, "\\%s\\",
563 get_local_machine_name());
564
565 if (local_machine_name == NULL) {
566 reply_nterror(req, NT_STATUS_NO_MEMORY);
567 return;
568 }
569
570 if (strnequal(state->name, local_machine_name,
571 strlen(local_machine_name))) {
572 name_offset = strlen(local_machine_name)-1;
573 }
574
575 if (!strnequal(&state->name[name_offset], "\\PIPE",
576 strlen("\\PIPE"))) {
577 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
578 return;
579 }
580
581 name_offset += strlen("\\PIPE");
582
583 /* Win9x weirdness. When talking to a unicode server Win9x
584 only sends \PIPE instead of \PIPE\ */
585
586 if (state->name[name_offset] == '\\')
587 name_offset++;
588
589 DEBUG(5,("calling named_pipe\n"));
590 named_pipe(conn, state->vuid, req,
591 state->name+name_offset,
592 state->setup,state->data,
593 state->param,
594 state->setup_count,state->total_data,
595 state->total_param,
596 state->max_setup_return,
597 state->max_data_return,
598 state->max_param_return);
599
600 if (state->close_on_completion) {
601 close_cnum(conn,state->vuid);
602 req->conn = NULL;
603 }
604
605 return;
606 }
607
608 /****************************************************************************
609 Reply to a SMBtrans.
610 ****************************************************************************/
611
612 void reply_trans(struct smb_request *req)
613 {
614 connection_struct *conn = req->conn;
615 unsigned int dsoff;
616 unsigned int dscnt;
617 unsigned int psoff;
618 unsigned int pscnt;
619 struct trans_state *state;
620 NTSTATUS result;
621
622 START_PROFILE(SMBtrans);
623
624 if (req->wct < 14) {
625 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
626 END_PROFILE(SMBtrans);
627 return;
628 }
629
630 dsoff = SVAL(req->vwv+12, 0);
631 dscnt = SVAL(req->vwv+11, 0);
632 psoff = SVAL(req->vwv+10, 0);
633 pscnt = SVAL(req->vwv+9, 0);
634
635 result = allow_new_trans(conn->pending_trans, req->mid);
636 if (!NT_STATUS_IS_OK(result)) {
637 DEBUG(2, ("Got invalid trans request: %s\n",
638 nt_errstr(result)));
639 reply_nterror(req, result);
640 END_PROFILE(SMBtrans);
641 return;
642 }
643
644 if ((state = TALLOC_P(conn, struct trans_state)) == NULL) {
645 DEBUG(0, ("talloc failed\n"));
646 reply_nterror(req, NT_STATUS_NO_MEMORY);
647 END_PROFILE(SMBtrans);
648 return;
649 }
650
651 state->cmd = SMBtrans;
652
653 state->mid = req->mid;
654 state->vuid = req->vuid;
655 state->setup_count = CVAL(req->vwv+13, 0);
656 state->setup = NULL;
657 state->total_param = SVAL(req->vwv+0, 0);
658 state->param = NULL;
659 state->total_data = SVAL(req->vwv+1, 0);
660 state->data = NULL;
661 state->max_param_return = SVAL(req->vwv+2, 0);
662 state->max_data_return = SVAL(req->vwv+3, 0);
663 state->max_setup_return = CVAL(req->vwv+4, 0);
664 state->close_on_completion = BITSETW(req->vwv+5, 0);
665 state->one_way = BITSETW(req->vwv+5, 1);
666
667 srvstr_pull_req_talloc(state, req, &state->name, req->buf,
668 STR_TERMINATE);
669
670 if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
671 !state->name)
672 goto bad_param;
673
674 if (state->total_data) {
675
676 if (trans_oob(state->total_data, 0, dscnt)
677 || trans_oob(smb_len(req->inbuf), dsoff, dscnt)) {
678 goto bad_param;
679 }
680
681 /* Can't use talloc here, the core routines do realloc on the
682 * params and data. Out of paranoia, 100 bytes too many. */
683 state->data = (char *)SMB_MALLOC(state->total_data+100);
684 if (state->data == NULL) {
685 DEBUG(0,("reply_trans: data malloc fail for %u "
686 "bytes !\n", (unsigned int)state->total_data));
687 TALLOC_FREE(state);
688 reply_nterror(req, NT_STATUS_NO_MEMORY);
689 END_PROFILE(SMBtrans);
690 return;
691 }
692 /* null-terminate the slack space */
693 memset(&state->data[state->total_data], 0, 100);
694
695 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
696 }
697
698 if (state->total_param) {
699
700 if (trans_oob(state->total_param, 0, pscnt)
701 || trans_oob(smb_len(req->inbuf), psoff, pscnt)) {
702 goto bad_param;
703 }
704
705 /* Can't use talloc here, the core routines do realloc on the
706 * params and data. Out of paranoia, 100 bytes too many */
707 state->param = (char *)SMB_MALLOC(state->total_param+100);
708 if (state->param == NULL) {
709 DEBUG(0,("reply_trans: param malloc fail for %u "
710 "bytes !\n", (unsigned int)state->total_param));
711 SAFE_FREE(state->data);
712 TALLOC_FREE(state);
713 reply_nterror(req, NT_STATUS_NO_MEMORY);
714 END_PROFILE(SMBtrans);
715 return;
716 }
717 /* null-terminate the slack space */
718 memset(&state->param[state->total_param], 0, 100);
719
720 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
721 }
722
723 state->received_data = dscnt;
724 state->received_param = pscnt;
725
726 if (state->setup_count) {
727 unsigned int i;
728
729 /*
730 * No overflow possible here, state->setup_count is an
731 * unsigned int, being filled by a single byte from
732 * CVAL(req->vwv+13, 0) above. The cast in the comparison
733 * below is not necessary, it's here to clarify things. The
734 * validity of req->vwv and req->wct has been checked in
735 * init_smb_request already.
736 */
737 if (state->setup_count + 14 > (unsigned int)req->wct) {
738 goto bad_param;
739 }
740
741 if((state->setup = TALLOC_ARRAY(
742 state, uint16, state->setup_count)) == NULL) {
743 DEBUG(0,("reply_trans: setup malloc fail for %u "
744 "bytes !\n", (unsigned int)
745 (state->setup_count * sizeof(uint16))));
746 SAFE_FREE(state->data);
747 SAFE_FREE(state->param);
748 TALLOC_FREE(state);
749 reply_nterror(req, NT_STATUS_NO_MEMORY);
750 END_PROFILE(SMBtrans);
751 return;
752 }
753
754 for (i=0;i<state->setup_count;i++) {
755 state->setup[i] = SVAL(req->vwv + 14 + i, 0);
756 }
757 }
758
759 state->received_param = pscnt;
760
761 if ((state->received_param != state->total_param) ||
762 (state->received_data != state->total_data)) {
763 DLIST_ADD(conn->pending_trans, state);
764
765 /* We need to send an interim response then receive the rest
766 of the parameter/data bytes */
767 reply_outbuf(req, 0, 0);
768 show_msg((char *)req->outbuf);
769 END_PROFILE(SMBtrans);
770 return;
771 }
772
773 talloc_steal(talloc_tos(), state);
774
775 handle_trans(conn, req, state);
776
777 SAFE_FREE(state->data);
778 SAFE_FREE(state->param);
779 TALLOC_FREE(state);
780
781 END_PROFILE(SMBtrans);
782 return;
783
784 bad_param:
785
786 DEBUG(0,("reply_trans: invalid trans parameters\n"));
787 SAFE_FREE(state->data);
788 SAFE_FREE(state->param);
789 TALLOC_FREE(state);
790 END_PROFILE(SMBtrans);
791 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
792 return;
793 }
794
795 /****************************************************************************
796 Reply to a secondary SMBtrans.
797 ****************************************************************************/
798
799 void reply_transs(struct smb_request *req)
800 {
801 connection_struct *conn = req->conn;
802 unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
803 struct trans_state *state;
804
805 START_PROFILE(SMBtranss);
806
807 show_msg((char *)req->inbuf);
808
809 if (req->wct < 8) {
810 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
811 END_PROFILE(SMBtranss);
812 return;
813 }
814
815 for (state = conn->pending_trans; state != NULL;
816 state = state->next) {
817 if (state->mid == req->mid) {
818 break;
819 }
820 }
821
822 if ((state == NULL) || (state->cmd != SMBtrans)) {
823 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
824 END_PROFILE(SMBtranss);
825 return;
826 }
827
828 /* Revise total_params and total_data in case they have changed
829 * downwards */
830
831 if (SVAL(req->vwv+0, 0) < state->total_param)
832 state->total_param = SVAL(req->vwv+0, 0);
833 if (SVAL(req->vwv+1, 0) < state->total_data)
834 state->total_data = SVAL(req->vwv+1, 0);
835
836 pcnt = SVAL(req->vwv+2, 0);
837 poff = SVAL(req->vwv+3, 0);
838 pdisp = SVAL(req->vwv+4, 0);
839
840 dcnt = SVAL(req->vwv+5, 0);
841 doff = SVAL(req->vwv+6, 0);
842 ddisp = SVAL(req->vwv+7, 0);
843
844 state->received_param += pcnt;
845 state->received_data += dcnt;
846
847 if ((state->received_data > state->total_data) ||
848 (state->received_param > state->total_param))
849 goto bad_param;
850
851 if (pcnt) {
852 if (trans_oob(state->total_param, pdisp, pcnt)
853 || trans_oob(smb_len(req->inbuf), poff, pcnt)) {
854 goto bad_param;
855 }
856 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,pcnt);
857 }
858
859 if (dcnt) {
860 if (trans_oob(state->total_data, ddisp, dcnt)
861 || trans_oob(smb_len(req->inbuf), doff, dcnt)) {
862 goto bad_param;
863 }
864 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,dcnt);
865 }
866
867 if ((state->received_param < state->total_param) ||
868 (state->received_data < state->total_data)) {
869 END_PROFILE(SMBtranss);
870 return;
871 }
872
873 talloc_steal(talloc_tos(), state);
874
875 handle_trans(conn, req, state);
876
877 DLIST_REMOVE(conn->pending_trans, state);
878 SAFE_FREE(state->data);
879 SAFE_FREE(state->param);
880 TALLOC_FREE(state);
881
882 END_PROFILE(SMBtranss);
883 return;
884
885 bad_param:
886
887 DEBUG(0,("reply_transs: invalid trans parameters\n"));
888 DLIST_REMOVE(conn->pending_trans, state);
889 SAFE_FREE(state->data);
890 SAFE_FREE(state->param);
891 TALLOC_FREE(state);
892 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
893 END_PROFILE(SMBtranss);
894 return;
895 }
reg import