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[Samba.git] / source3 / smbd / ipc.c
blob2cf00389855e4838fef7e79671932eb1e4867666
1 /*
2 Unix SMB/CIFS implementation.
3 Inter-process communication and named pipe handling
4 Copyright (C) Andrew Tridgell 1992-1998
5
6 SMB Version handling
7 Copyright (C) John H Terpstra 1995-1998
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 */
22 /*
23 This file handles the named pipe and mailslot calls
24 in the SMBtrans protocol
25 */
26
27 #include "includes.h"
28 #include "smbd/globals.h"
29
30 #define NERR_notsupported 50
31
32 static void api_no_reply(connection_struct *conn, struct smb_request *req);
33
34 /*******************************************************************
35 copies parameters and data, as needed, into the smb buffer
36
37 *both* the data and params sections should be aligned. this
38 is fudged in the rpc pipes by
39 at present, only the data section is. this may be a possible
40 cause of some of the ipc problems being experienced. lkcl26dec97
41
42 ******************************************************************/
43
44 static void copy_trans_params_and_data(char *outbuf, int align,
45 char *rparam, int param_offset, int param_len,
46 char *rdata, int data_offset, int data_len)
47 {
48 char *copy_into = smb_buf(outbuf);
49
50 if(param_len < 0)
51 param_len = 0;
52
53 if(data_len < 0)
54 data_len = 0;
55
56 DEBUG(5,("copy_trans_params_and_data: params[%d..%d] data[%d..%d] (align %d)\n",
57 param_offset, param_offset + param_len,
58 data_offset , data_offset + data_len,
59 align));
60
61 *copy_into = '\0';
62
63 copy_into += 1;
64
65 if (param_len)
66 memcpy(copy_into, &rparam[param_offset], param_len);
67
68 copy_into += param_len;
69 if (align) {
70 memset(copy_into, '\0', align);
71 }
72
73 copy_into += align;
74
75 if (data_len )
76 memcpy(copy_into, &rdata[data_offset], data_len);
77 }
78
79 /****************************************************************************
80 Send a trans reply.
81 ****************************************************************************/
82
83 void send_trans_reply(connection_struct *conn,
84 struct smb_request *req,
85 char *rparam, int rparam_len,
86 char *rdata, int rdata_len,
87 bool buffer_too_large)
88 {
89 int this_ldata,this_lparam;
90 int tot_data_sent = 0;
91 int tot_param_sent = 0;
92 int align;
93
94 int ldata = rdata ? rdata_len : 0;
95 int lparam = rparam ? rparam_len : 0;
96
97 if (buffer_too_large)
98 DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
99
100 this_lparam = MIN(lparam,max_send - 500); /* hack */
101 this_ldata = MIN(ldata,max_send - (500+this_lparam));
102
103 align = ((this_lparam)%4);
104
105 reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
106
107 /*
108 * We might have SMBtranss in req which was transferred to the outbuf,
109 * fix that.
110 */
111 SCVAL(req->outbuf, smb_com, SMBtrans);
112
113 copy_trans_params_and_data((char *)req->outbuf, align,
114 rparam, tot_param_sent, this_lparam,
115 rdata, tot_data_sent, this_ldata);
116
117 SSVAL(req->outbuf,smb_vwv0,lparam);
118 SSVAL(req->outbuf,smb_vwv1,ldata);
119 SSVAL(req->outbuf,smb_vwv3,this_lparam);
120 SSVAL(req->outbuf,smb_vwv4,
121 smb_offset(smb_buf(req->outbuf)+1, req->outbuf));
122 SSVAL(req->outbuf,smb_vwv5,0);
123 SSVAL(req->outbuf,smb_vwv6,this_ldata);
124 SSVAL(req->outbuf,smb_vwv7,
125 smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
126 req->outbuf));
127 SSVAL(req->outbuf,smb_vwv8,0);
128 SSVAL(req->outbuf,smb_vwv9,0);
129
130 if (buffer_too_large) {
131 error_packet_set((char *)req->outbuf, ERRDOS, ERRmoredata,
132 STATUS_BUFFER_OVERFLOW, __LINE__, __FILE__);
133 }
134
135 show_msg((char *)req->outbuf);
136 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
137 IS_CONN_ENCRYPTED(conn), &req->pcd)) {
138 exit_server_cleanly("send_trans_reply: srv_send_smb failed.");
139 }
140
141 TALLOC_FREE(req->outbuf);
142
143 tot_data_sent = this_ldata;
144 tot_param_sent = this_lparam;
145
146 while (tot_data_sent < ldata || tot_param_sent < lparam)
147 {
148 this_lparam = MIN(lparam-tot_param_sent,
149 max_send - 500); /* hack */
150 this_ldata = MIN(ldata -tot_data_sent,
151 max_send - (500+this_lparam));
152
153 if(this_lparam < 0)
154 this_lparam = 0;
155
156 if(this_ldata < 0)
157 this_ldata = 0;
158
159 align = (this_lparam%4);
160
161 reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
162
163 /*
164 * We might have SMBtranss in req which was transferred to the
165 * outbuf, fix that.
166 */
167 SCVAL(req->outbuf, smb_com, SMBtrans);
168
169 copy_trans_params_and_data((char *)req->outbuf, align,
170 rparam, tot_param_sent, this_lparam,
171 rdata, tot_data_sent, this_ldata);
172
173 SSVAL(req->outbuf,smb_vwv0,lparam);
174 SSVAL(req->outbuf,smb_vwv1,ldata);
175
176 SSVAL(req->outbuf,smb_vwv3,this_lparam);
177 SSVAL(req->outbuf,smb_vwv4,
178 smb_offset(smb_buf(req->outbuf)+1,req->outbuf));
179 SSVAL(req->outbuf,smb_vwv5,tot_param_sent);
180 SSVAL(req->outbuf,smb_vwv6,this_ldata);
181 SSVAL(req->outbuf,smb_vwv7,
182 smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
183 req->outbuf));
184 SSVAL(req->outbuf,smb_vwv8,tot_data_sent);
185 SSVAL(req->outbuf,smb_vwv9,0);
186
187 if (buffer_too_large) {
188 error_packet_set((char *)req->outbuf,
189 ERRDOS, ERRmoredata,
190 STATUS_BUFFER_OVERFLOW,
191 __LINE__, __FILE__);
192 }
193
194 show_msg((char *)req->outbuf);
195 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
196 IS_CONN_ENCRYPTED(conn), &req->pcd))
197 exit_server_cleanly("send_trans_reply: srv_send_smb "
198 "failed.");
199
200 tot_data_sent += this_ldata;
201 tot_param_sent += this_lparam;
202 TALLOC_FREE(req->outbuf);
203 }
204 }
205
206 /****************************************************************************
207 Start the first part of an RPC reply which began with an SMBtrans request.
208 ****************************************************************************/
209
210 struct dcerpc_cmd_state {
211 struct fake_file_handle *handle;
212 uint8_t *data;
213 size_t num_data;
214 size_t max_read;
215 };
216
217 static void api_dcerpc_cmd_write_done(struct tevent_req *subreq);
218 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq);
219
220 static void api_dcerpc_cmd(connection_struct *conn, struct smb_request *req,
221 files_struct *fsp, uint8_t *data, size_t length,
222 size_t max_read)
223 {
224 struct tevent_req *subreq;
225 struct dcerpc_cmd_state *state;
226
227 if (!fsp_is_np(fsp)) {
228 api_no_reply(conn, req);
229 return;
230 }
231
232 state = talloc(req, struct dcerpc_cmd_state);
233 if (state == NULL) {
234 reply_nterror(req, NT_STATUS_NO_MEMORY);
235 return;
236 }
237 req->async_priv = state;
238
239 state->handle = fsp->fake_file_handle;
240
241 /*
242 * This memdup severely sucks. But doing it properly essentially means
243 * to rewrite lanman.c, something which I don't really want to do now.
244 */
245 state->data = (uint8_t *)talloc_memdup(state, data, length);
246 if (state->data == NULL) {
247 reply_nterror(req, NT_STATUS_NO_MEMORY);
248 return;
249 }
250 state->num_data = length;
251 state->max_read = max_read;
252
253 subreq = np_write_send(state, smbd_event_context(), state->handle,
254 state->data, length);
255 if (subreq == NULL) {
256 TALLOC_FREE(state);
257 reply_nterror(req, NT_STATUS_NO_MEMORY);
258 return;
259 }
260 tevent_req_set_callback(subreq, api_dcerpc_cmd_write_done,
261 talloc_move(conn, &req));
262 }
263
264 static void api_dcerpc_cmd_write_done(struct tevent_req *subreq)
265 {
266 struct smb_request *req = tevent_req_callback_data(
267 subreq, struct smb_request);
268 struct dcerpc_cmd_state *state = talloc_get_type_abort(
269 req->async_priv, struct dcerpc_cmd_state);
270 NTSTATUS status;
271 ssize_t nwritten = -1;
272
273 status = np_write_recv(subreq, &nwritten);
274 TALLOC_FREE(subreq);
275 if (!NT_STATUS_IS_OK(status) || (nwritten != state->num_data)) {
276 DEBUG(10, ("Could not write to pipe: %s (%d/%d)\n",
277 nt_errstr(status), (int)state->num_data,
278 (int)nwritten));
279 reply_nterror(req, NT_STATUS_PIPE_NOT_AVAILABLE);
280 goto send;
281 }
282
283 state->data = TALLOC_REALLOC_ARRAY(state, state->data, uint8_t,
284 state->max_read);
285 if (state->data == NULL) {
286 reply_nterror(req, NT_STATUS_NO_MEMORY);
287 goto send;
288 }
289
290 subreq = np_read_send(req->conn, smbd_event_context(),
291 state->handle, state->data, state->max_read);
292 if (subreq == NULL) {
293 reply_nterror(req, NT_STATUS_NO_MEMORY);
294 goto send;
295 }
296 tevent_req_set_callback(subreq, api_dcerpc_cmd_read_done, req);
297 return;
298
299 send:
300 if (!srv_send_smb(
301 smbd_server_fd(), (char *)req->outbuf,
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 IS_CONN_ENCRYPTED(req->conn)
329 ||req->encrypted, &req->pcd)) {
330 exit_server_cleanly("construct_reply: srv_send_smb "
331 "failed.");
332 }
333 TALLOC_FREE(req);
334 return;
335 }
336
337 send_trans_reply(req->conn, req, NULL, 0, (char *)state->data, nread,
338 is_data_outstanding);
339 TALLOC_FREE(req);
340 }
341
342 /****************************************************************************
343 WaitNamedPipeHandleState
344 ****************************************************************************/
345
346 static void api_WNPHS(connection_struct *conn, struct smb_request *req,
347 struct files_struct *fsp, char *param, int param_len)
348 {
349 if (!param || param_len < 2) {
350 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
351 return;
352 }
353
354 DEBUG(4,("WaitNamedPipeHandleState priority %x\n",
355 (int)SVAL(param,0)));
356
357 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
358 }
359
360
361 /****************************************************************************
362 SetNamedPipeHandleState
363 ****************************************************************************/
364
365 static void api_SNPHS(connection_struct *conn, struct smb_request *req,
366 struct files_struct *fsp, char *param, int param_len)
367 {
368 if (!param || param_len < 2) {
369 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
370 return;
371 }
372
373 DEBUG(4,("SetNamedPipeHandleState to code %x\n", (int)SVAL(param,0)));
374
375 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
376 }
377
378
379 /****************************************************************************
380 When no reply is generated, indicate unsupported.
381 ****************************************************************************/
382
383 static void api_no_reply(connection_struct *conn, struct smb_request *req)
384 {
385 char rparam[4];
386
387 /* unsupported */
388 SSVAL(rparam,0,NERR_notsupported);
389 SSVAL(rparam,2,0); /* converter word */
390
391 DEBUG(3,("Unsupported API fd command\n"));
392
393 /* now send the reply */
394 send_trans_reply(conn, req, rparam, 4, NULL, 0, False);
395
396 return;
397 }
398
399 /****************************************************************************
400 Handle remote api calls delivered to a named pipe already opened.
401 ****************************************************************************/
402
403 static void api_fd_reply(connection_struct *conn, uint16 vuid,
404 struct smb_request *req,
405 uint16 *setup, uint8_t *data, char *params,
406 int suwcnt, int tdscnt, int tpscnt,
407 int mdrcnt, int mprcnt)
408 {
409 struct files_struct *fsp;
410 int pnum;
411 int subcommand;
412
413 DEBUG(5,("api_fd_reply\n"));
414
415 /* First find out the name of this file. */
416 if (suwcnt != 2) {
417 DEBUG(0,("Unexpected named pipe transaction.\n"));
418 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
419 return;
420 }
421
422 /* Get the file handle and hence the file name. */
423 /*
424 * NB. The setup array has already been transformed
425 * via SVAL and so is in host byte order.
426 */
427 pnum = ((int)setup[1]) & 0xFFFF;
428 subcommand = ((int)setup[0]) & 0xFFFF;
429
430 fsp = file_fsp(req, pnum);
431
432 if (!fsp_is_np(fsp)) {
433 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
434 /* Win9x does this call with a unicode pipe name, not a pnum. */
435 /* Just return success for now... */
436 DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
437 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
438 return;
439 }
440
441 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
442 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
443 return;
444 }
445
446 if (vuid != fsp->vuid) {
447 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
448 "expected %d\n", pnum, vuid, fsp->vuid));
449 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
450 return;
451 }
452
453 DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n",
454 subcommand, fsp->fsp_name, pnum));
455
456 DEBUG(10, ("api_fd_reply: p:%p max_trans_reply: %d\n", fsp, mdrcnt));
457
458 switch (subcommand) {
459 case TRANSACT_DCERPCCMD: {
460 /* dce/rpc command */
461 api_dcerpc_cmd(conn, req, fsp, (uint8_t *)data, tdscnt,
462 mdrcnt);
463 break;
464 }
465 case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
466 /* Wait Named Pipe Handle state */
467 api_WNPHS(conn, req, fsp, params, tpscnt);
468 break;
469 case TRANSACT_SETNAMEDPIPEHANDLESTATE:
470 /* Set Named Pipe Handle state */
471 api_SNPHS(conn, req, fsp, params, tpscnt);
472 break;
473 default:
474 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
475 return;
476 }
477 }
478
479 /****************************************************************************
480 Handle named pipe commands.
481 ****************************************************************************/
482
483 static void named_pipe(connection_struct *conn, uint16 vuid,
484 struct smb_request *req,
485 const char *name, uint16 *setup,
486 char *data, char *params,
487 int suwcnt, int tdscnt,int tpscnt,
488 int msrcnt, int mdrcnt, int mprcnt)
489 {
490 DEBUG(3,("named pipe command on <%s> name\n", name));
491
492 if (strequal(name,"LANMAN")) {
493 api_reply(conn, vuid, req,
494 data, params,
495 tdscnt, tpscnt,
496 mdrcnt, mprcnt);
497 return;
498 }
499
500 if (strequal(name,"WKSSVC") ||
501 strequal(name,"SRVSVC") ||
502 strequal(name,"WINREG") ||
503 strequal(name,"SAMR") ||
504 strequal(name,"LSARPC")) {
505
506 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
507
508 api_fd_reply(conn, vuid, req,
509 setup, (uint8_t *)data, params,
510 suwcnt, tdscnt, tpscnt,
511 mdrcnt, mprcnt);
512 return;
513 }
514
515 if (strlen(name) < 1) {
516 api_fd_reply(conn, vuid, req,
517 setup, (uint8_t *)data,
518 params, suwcnt, tdscnt,
519 tpscnt, mdrcnt, mprcnt);
520 return;
521 }
522
523 if (setup)
524 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
525 (int)setup[0],(int)setup[1]));
526
527 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
528 return;
529 }
530
531 static void handle_trans(connection_struct *conn, struct smb_request *req,
532 struct trans_state *state)
533 {
534 char *local_machine_name;
535 int name_offset = 0;
536
537 DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
538 state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
539 (unsigned int)state->setup_count));
540
541 /*
542 * WinCE wierdness....
543 */
544
545 local_machine_name = talloc_asprintf(state, "\\%s\\",
546 get_local_machine_name());
547
548 if (local_machine_name == NULL) {
549 reply_nterror(req, NT_STATUS_NO_MEMORY);
550 return;
551 }
552
553 if (strnequal(state->name, local_machine_name,
554 strlen(local_machine_name))) {
555 name_offset = strlen(local_machine_name)-1;
556 }
557
558 if (!strnequal(&state->name[name_offset], "\\PIPE",
559 strlen("\\PIPE"))) {
560 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
561 return;
562 }
563
564 name_offset += strlen("\\PIPE");
565
566 /* Win9x weirdness. When talking to a unicode server Win9x
567 only sends \PIPE instead of \PIPE\ */
568
569 if (state->name[name_offset] == '\\')
570 name_offset++;
571
572 DEBUG(5,("calling named_pipe\n"));
573 named_pipe(conn, state->vuid, req,
574 state->name+name_offset,
575 state->setup,state->data,
576 state->param,
577 state->setup_count,state->total_data,
578 state->total_param,
579 state->max_setup_return,
580 state->max_data_return,
581 state->max_param_return);
582
583 if (state->close_on_completion) {
584 close_cnum(conn,state->vuid);
585 req->conn = NULL;
586 }
587
588 return;
589 }
590
591 /****************************************************************************
592 Reply to a SMBtrans.
593 ****************************************************************************/
594
595 void reply_trans(struct smb_request *req)
596 {
597 connection_struct *conn = req->conn;
598 unsigned int dsoff;
599 unsigned int dscnt;
600 unsigned int psoff;
601 unsigned int pscnt;
602 struct trans_state *state;
603 NTSTATUS result;
604
605 START_PROFILE(SMBtrans);
606
607 if (req->wct < 14) {
608 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
609 END_PROFILE(SMBtrans);
610 return;
611 }
612
613 dsoff = SVAL(req->vwv+12, 0);
614 dscnt = SVAL(req->vwv+11, 0);
615 psoff = SVAL(req->vwv+10, 0);
616 pscnt = SVAL(req->vwv+9, 0);
617
618 result = allow_new_trans(conn->pending_trans, req->mid);
619 if (!NT_STATUS_IS_OK(result)) {
620 DEBUG(2, ("Got invalid trans request: %s\n",
621 nt_errstr(result)));
622 reply_nterror(req, result);
623 END_PROFILE(SMBtrans);
624 return;
625 }
626
627 if ((state = TALLOC_P(conn, struct trans_state)) == NULL) {
628 DEBUG(0, ("talloc failed\n"));
629 reply_nterror(req, NT_STATUS_NO_MEMORY);
630 END_PROFILE(SMBtrans);
631 return;
632 }
633
634 state->cmd = SMBtrans;
635
636 state->mid = req->mid;
637 state->vuid = req->vuid;
638 state->setup_count = CVAL(req->vwv+13, 0);
639 state->setup = NULL;
640 state->total_param = SVAL(req->vwv+0, 0);
641 state->param = NULL;
642 state->total_data = SVAL(req->vwv+1, 0);
643 state->data = NULL;
644 state->max_param_return = SVAL(req->vwv+2, 0);
645 state->max_data_return = SVAL(req->vwv+3, 0);
646 state->max_setup_return = CVAL(req->vwv+4, 0);
647 state->close_on_completion = BITSETW(req->vwv+5, 0);
648 state->one_way = BITSETW(req->vwv+5, 1);
649
650 srvstr_pull_req_talloc(state, req, &state->name, req->buf,
651 STR_TERMINATE);
652
653 if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
654 !state->name)
655 goto bad_param;
656
657 if (state->total_data) {
658
659 if (trans_oob(state->total_data, 0, dscnt)
660 || trans_oob(smb_len(req->inbuf), dsoff, dscnt)) {
661 goto bad_param;
662 }
663
664 /* Can't use talloc here, the core routines do realloc on the
665 * params and data. Out of paranoia, 100 bytes too many. */
666 state->data = (char *)SMB_MALLOC(state->total_data+100);
667 if (state->data == NULL) {
668 DEBUG(0,("reply_trans: data malloc fail for %u "
669 "bytes !\n", (unsigned int)state->total_data));
670 TALLOC_FREE(state);
671 reply_nterror(req, NT_STATUS_NO_MEMORY);
672 END_PROFILE(SMBtrans);
673 return;
674 }
675 /* null-terminate the slack space */
676 memset(&state->data[state->total_data], 0, 100);
677
678 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
679 }
680
681 if (state->total_param) {
682
683 if (trans_oob(state->total_param, 0, pscnt)
684 || trans_oob(smb_len(req->inbuf), psoff, pscnt)) {
685 goto bad_param;
686 }
687
688 /* Can't use talloc here, the core routines do realloc on the
689 * params and data. Out of paranoia, 100 bytes too many */
690 state->param = (char *)SMB_MALLOC(state->total_param+100);
691 if (state->param == NULL) {
692 DEBUG(0,("reply_trans: param malloc fail for %u "
693 "bytes !\n", (unsigned int)state->total_param));
694 SAFE_FREE(state->data);
695 TALLOC_FREE(state);
696 reply_nterror(req, NT_STATUS_NO_MEMORY);
697 END_PROFILE(SMBtrans);
698 return;
699 }
700 /* null-terminate the slack space */
701 memset(&state->param[state->total_param], 0, 100);
702
703 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
704 }
705
706 state->received_data = dscnt;
707 state->received_param = pscnt;
708
709 if (state->setup_count) {
710 unsigned int i;
711
712 /*
713 * No overflow possible here, state->setup_count is an
714 * unsigned int, being filled by a single byte from
715 * CVAL(req->vwv+13, 0) above. The cast in the comparison
716 * below is not necessary, it's here to clarify things. The
717 * validity of req->vwv and req->wct has been checked in
718 * init_smb_request already.
719 */
720 if (state->setup_count + 14 > (unsigned int)req->wct) {
721 goto bad_param;
722 }
723
724 if((state->setup = TALLOC_ARRAY(
725 state, uint16, state->setup_count)) == NULL) {
726 DEBUG(0,("reply_trans: setup malloc fail for %u "
727 "bytes !\n", (unsigned int)
728 (state->setup_count * sizeof(uint16))));
729 SAFE_FREE(state->data);
730 SAFE_FREE(state->param);
731 TALLOC_FREE(state);
732 reply_nterror(req, NT_STATUS_NO_MEMORY);
733 END_PROFILE(SMBtrans);
734 return;
735 }
736
737 for (i=0;i<state->setup_count;i++) {
738 state->setup[i] = SVAL(req->vwv + 14 + i, 0);
739 }
740 }
741
742 state->received_param = pscnt;
743
744 if ((state->received_param != state->total_param) ||
745 (state->received_data != state->total_data)) {
746 DLIST_ADD(conn->pending_trans, state);
747
748 /* We need to send an interim response then receive the rest
749 of the parameter/data bytes */
750 reply_outbuf(req, 0, 0);
751 show_msg((char *)req->outbuf);
752 END_PROFILE(SMBtrans);
753 return;
754 }
755
756 talloc_steal(talloc_tos(), state);
757
758 handle_trans(conn, req, state);
759
760 SAFE_FREE(state->data);
761 SAFE_FREE(state->param);
762 TALLOC_FREE(state);
763
764 END_PROFILE(SMBtrans);
765 return;
766
767 bad_param:
768
769 DEBUG(0,("reply_trans: invalid trans parameters\n"));
770 SAFE_FREE(state->data);
771 SAFE_FREE(state->param);
772 TALLOC_FREE(state);
773 END_PROFILE(SMBtrans);
774 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
775 return;
776 }
777
778 /****************************************************************************
779 Reply to a secondary SMBtrans.
780 ****************************************************************************/
781
782 void reply_transs(struct smb_request *req)
783 {
784 connection_struct *conn = req->conn;
785 unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
786 struct trans_state *state;
787
788 START_PROFILE(SMBtranss);
789
790 show_msg((char *)req->inbuf);
791
792 if (req->wct < 8) {
793 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
794 END_PROFILE(SMBtranss);
795 return;
796 }
797
798 for (state = conn->pending_trans; state != NULL;
799 state = state->next) {
800 if (state->mid == req->mid) {
801 break;
802 }
803 }
804
805 if ((state == NULL) || (state->cmd != SMBtrans)) {
806 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
807 END_PROFILE(SMBtranss);
808 return;
809 }
810
811 /* Revise total_params and total_data in case they have changed
812 * downwards */
813
814 if (SVAL(req->vwv+0, 0) < state->total_param)
815 state->total_param = SVAL(req->vwv+0, 0);
816 if (SVAL(req->vwv+1, 0) < state->total_data)
817 state->total_data = SVAL(req->vwv+1, 0);
818
819 pcnt = SVAL(req->vwv+2, 0);
820 poff = SVAL(req->vwv+3, 0);
821 pdisp = SVAL(req->vwv+4, 0);
822
823 dcnt = SVAL(req->vwv+5, 0);
824 doff = SVAL(req->vwv+6, 0);
825 ddisp = SVAL(req->vwv+7, 0);
826
827 state->received_param += pcnt;
828 state->received_data += dcnt;
829
830 if ((state->received_data > state->total_data) ||
831 (state->received_param > state->total_param))
832 goto bad_param;
833
834 if (pcnt) {
835 if (trans_oob(state->total_param, pdisp, pcnt)
836 || trans_oob(smb_len(req->inbuf), poff, pcnt)) {
837 goto bad_param;
838 }
839 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,pcnt);
840 }
841
842 if (dcnt) {
843 if (trans_oob(state->total_data, ddisp, dcnt)
844 || trans_oob(smb_len(req->inbuf), doff, dcnt)) {
845 goto bad_param;
846 }
847 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,dcnt);
848 }
849
850 if ((state->received_param < state->total_param) ||
851 (state->received_data < state->total_data)) {
852 END_PROFILE(SMBtranss);
853 return;
854 }
855
856 talloc_steal(talloc_tos(), state);
857
858 handle_trans(conn, req, state);
859
860 DLIST_REMOVE(conn->pending_trans, state);
861 SAFE_FREE(state->data);
862 SAFE_FREE(state->param);
863 TALLOC_FREE(state);
864
865 END_PROFILE(SMBtranss);
866 return;
867
868 bad_param:
869
870 DEBUG(0,("reply_transs: invalid trans parameters\n"));
871 DLIST_REMOVE(conn->pending_trans, state);
872 SAFE_FREE(state->data);
873 SAFE_FREE(state->param);
874 TALLOC_FREE(state);
875 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
876 END_PROFILE(SMBtranss);
877 return;
878 }
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