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smbd: Simplify dropbox special case in unix_convert
[Samba.git] / source3 / smbd / ipc.c
blobf303e8f17136616751d498469b76d0f9c138a556
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/smbd.h"
29 #include "smbd/globals.h"
30 #include "smbprofile.h"
31 #include "rpc_server/srv_pipe_hnd.h"
32
33 #define NERR_notsupported 50
34
35 static void api_no_reply(connection_struct *conn, struct smb_request *req);
36
37 /*******************************************************************
38 copies parameters and data, as needed, into the smb buffer
39
40 *both* the data and params sections should be aligned. this
41 is fudged in the rpc pipes by
42 at present, only the data section is. this may be a possible
43 cause of some of the ipc problems being experienced. lkcl26dec97
44
45 ******************************************************************/
46
47 static void copy_trans_params_and_data(char *outbuf, int align,
48 char *rparam, int param_offset, int param_len,
49 char *rdata, int data_offset, int data_len)
50 {
51 char *copy_into = smb_buf(outbuf);
52
53 if(param_len < 0)
54 param_len = 0;
55
56 if(data_len < 0)
57 data_len = 0;
58
59 DEBUG(5,("copy_trans_params_and_data: params[%d..%d] data[%d..%d] (align %d)\n",
60 param_offset, param_offset + param_len,
61 data_offset , data_offset + data_len,
62 align));
63
64 *copy_into = '\0';
65
66 copy_into += 1;
67
68 if (param_len)
69 memcpy(copy_into, &rparam[param_offset], param_len);
70
71 copy_into += param_len;
72 if (align) {
73 memset(copy_into, '\0', align);
74 }
75
76 copy_into += align;
77
78 if (data_len )
79 memcpy(copy_into, &rdata[data_offset], data_len);
80 }
81
82 /****************************************************************************
83 Send a trans reply.
84 ****************************************************************************/
85
86 void send_trans_reply(connection_struct *conn,
87 struct smb_request *req,
88 char *rparam, int rparam_len,
89 char *rdata, int rdata_len,
90 bool buffer_too_large)
91 {
92 int this_ldata,this_lparam;
93 int tot_data_sent = 0;
94 int tot_param_sent = 0;
95 int align;
96
97 int ldata = rdata ? rdata_len : 0;
98 int lparam = rparam ? rparam_len : 0;
99 struct smbd_server_connection *sconn = req->sconn;
100 int max_send = sconn->smb1.sessions.max_send;
101
102 if (buffer_too_large)
103 DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
104
105 this_lparam = MIN(lparam,max_send - 500); /* hack */
106 this_ldata = MIN(ldata,max_send - (500+this_lparam));
107
108 align = ((this_lparam)%4);
109
110 reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
111
112 /*
113 * We might have SMBtranss in req which was transferred to the outbuf,
114 * fix that.
115 */
116 SCVAL(req->outbuf, smb_com, SMBtrans);
117
118 copy_trans_params_and_data((char *)req->outbuf, align,
119 rparam, tot_param_sent, this_lparam,
120 rdata, tot_data_sent, this_ldata);
121
122 SSVAL(req->outbuf,smb_vwv0,lparam);
123 SSVAL(req->outbuf,smb_vwv1,ldata);
124 SSVAL(req->outbuf,smb_vwv3,this_lparam);
125 SSVAL(req->outbuf,smb_vwv4,
126 smb_offset(smb_buf(req->outbuf)+1, req->outbuf));
127 SSVAL(req->outbuf,smb_vwv5,0);
128 SSVAL(req->outbuf,smb_vwv6,this_ldata);
129 SSVAL(req->outbuf,smb_vwv7,
130 smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
131 req->outbuf));
132 SSVAL(req->outbuf,smb_vwv8,0);
133 SSVAL(req->outbuf,smb_vwv9,0);
134
135 if (buffer_too_large) {
136 error_packet_set((char *)req->outbuf, ERRDOS, ERRmoredata,
137 STATUS_BUFFER_OVERFLOW, __LINE__, __FILE__);
138 }
139
140 show_msg((char *)req->outbuf);
141 if (!srv_send_smb(sconn, (char *)req->outbuf,
142 true, req->seqnum+1,
143 IS_CONN_ENCRYPTED(conn), &req->pcd)) {
144 exit_server_cleanly("send_trans_reply: srv_send_smb failed.");
145 }
146
147 TALLOC_FREE(req->outbuf);
148
149 tot_data_sent = this_ldata;
150 tot_param_sent = this_lparam;
151
152 while (tot_data_sent < ldata || tot_param_sent < lparam)
153 {
154 this_lparam = MIN(lparam-tot_param_sent,
155 max_send - 500); /* hack */
156 this_ldata = MIN(ldata -tot_data_sent,
157 max_send - (500+this_lparam));
158
159 if(this_lparam < 0)
160 this_lparam = 0;
161
162 if(this_ldata < 0)
163 this_ldata = 0;
164
165 align = (this_lparam%4);
166
167 reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
168
169 /*
170 * We might have SMBtranss in req which was transferred to the
171 * outbuf, fix that.
172 */
173 SCVAL(req->outbuf, smb_com, SMBtrans);
174
175 copy_trans_params_and_data((char *)req->outbuf, align,
176 rparam, tot_param_sent, this_lparam,
177 rdata, tot_data_sent, this_ldata);
178
179 SSVAL(req->outbuf,smb_vwv0,lparam);
180 SSVAL(req->outbuf,smb_vwv1,ldata);
181
182 SSVAL(req->outbuf,smb_vwv3,this_lparam);
183 SSVAL(req->outbuf,smb_vwv4,
184 smb_offset(smb_buf(req->outbuf)+1,req->outbuf));
185 SSVAL(req->outbuf,smb_vwv5,tot_param_sent);
186 SSVAL(req->outbuf,smb_vwv6,this_ldata);
187 SSVAL(req->outbuf,smb_vwv7,
188 smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
189 req->outbuf));
190 SSVAL(req->outbuf,smb_vwv8,tot_data_sent);
191 SSVAL(req->outbuf,smb_vwv9,0);
192
193 if (buffer_too_large) {
194 error_packet_set((char *)req->outbuf,
195 ERRDOS, ERRmoredata,
196 STATUS_BUFFER_OVERFLOW,
197 __LINE__, __FILE__);
198 }
199
200 show_msg((char *)req->outbuf);
201 if (!srv_send_smb(sconn, (char *)req->outbuf,
202 true, req->seqnum+1,
203 IS_CONN_ENCRYPTED(conn), &req->pcd))
204 exit_server_cleanly("send_trans_reply: srv_send_smb "
205 "failed.");
206
207 tot_data_sent += this_ldata;
208 tot_param_sent += this_lparam;
209 TALLOC_FREE(req->outbuf);
210 }
211 }
212
213 /****************************************************************************
214 Start the first part of an RPC reply which began with an SMBtrans request.
215 ****************************************************************************/
216
217 struct dcerpc_cmd_state {
218 struct fake_file_handle *handle;
219 uint8_t *data;
220 size_t num_data;
221 size_t max_read;
222 };
223
224 static void api_dcerpc_cmd_write_done(struct tevent_req *subreq);
225 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq);
226
227 static void api_dcerpc_cmd(connection_struct *conn, struct smb_request *req,
228 files_struct *fsp, uint8_t *data, size_t length,
229 size_t max_read)
230 {
231 struct tevent_req *subreq;
232 struct dcerpc_cmd_state *state;
233 bool busy;
234
235 if (!fsp_is_np(fsp)) {
236 api_no_reply(conn, req);
237 return;
238 }
239
240 /*
241 * Trans requests are only allowed
242 * if no other Trans or Read is active
243 */
244 busy = np_read_in_progress(fsp->fake_file_handle);
245 if (busy) {
246 reply_nterror(req, NT_STATUS_PIPE_BUSY);
247 return;
248 }
249
250 state = talloc(req, struct dcerpc_cmd_state);
251 if (state == NULL) {
252 reply_nterror(req, NT_STATUS_NO_MEMORY);
253 return;
254 }
255 req->async_priv = state;
256
257 state->handle = fsp->fake_file_handle;
258
259 /*
260 * This memdup severely sucks. But doing it properly essentially means
261 * to rewrite lanman.c, something which I don't really want to do now.
262 */
263 state->data = (uint8_t *)talloc_memdup(state, data, length);
264 if (state->data == NULL) {
265 reply_nterror(req, NT_STATUS_NO_MEMORY);
266 return;
267 }
268 state->num_data = length;
269 state->max_read = max_read;
270
271 subreq = np_write_send(state, smbd_event_context(), state->handle,
272 state->data, length);
273 if (subreq == NULL) {
274 TALLOC_FREE(state);
275 reply_nterror(req, NT_STATUS_NO_MEMORY);
276 return;
277 }
278 tevent_req_set_callback(subreq, api_dcerpc_cmd_write_done,
279 talloc_move(conn, &req));
280 }
281
282 static void api_dcerpc_cmd_write_done(struct tevent_req *subreq)
283 {
284 struct smb_request *req = tevent_req_callback_data(
285 subreq, struct smb_request);
286 struct dcerpc_cmd_state *state = talloc_get_type_abort(
287 req->async_priv, struct dcerpc_cmd_state);
288 NTSTATUS status;
289 ssize_t nwritten = -1;
290
291 status = np_write_recv(subreq, &nwritten);
292 TALLOC_FREE(subreq);
293 if (!NT_STATUS_IS_OK(status) || (nwritten != state->num_data)) {
294 DEBUG(10, ("Could not write to pipe: %s (%d/%d)\n",
295 nt_errstr(status), (int)state->num_data,
296 (int)nwritten));
297 reply_nterror(req, NT_STATUS_PIPE_NOT_AVAILABLE);
298 goto send;
299 }
300
301 state->data = TALLOC_REALLOC_ARRAY(state, state->data, uint8_t,
302 state->max_read);
303 if (state->data == NULL) {
304 reply_nterror(req, NT_STATUS_NO_MEMORY);
305 goto send;
306 }
307
308 subreq = np_read_send(req->conn, smbd_event_context(),
309 state->handle, state->data, state->max_read);
310 if (subreq == NULL) {
311 reply_nterror(req, NT_STATUS_NO_MEMORY);
312 goto send;
313 }
314 tevent_req_set_callback(subreq, api_dcerpc_cmd_read_done, req);
315 return;
316
317 send:
318 if (!srv_send_smb(
319 req->sconn, (char *)req->outbuf,
320 true, req->seqnum+1,
321 IS_CONN_ENCRYPTED(req->conn) || req->encrypted,
322 &req->pcd)) {
323 exit_server_cleanly("api_dcerpc_cmd_write_done: "
324 "srv_send_smb failed.");
325 }
326 TALLOC_FREE(req);
327 }
328
329 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq)
330 {
331 struct smb_request *req = tevent_req_callback_data(
332 subreq, struct smb_request);
333 struct dcerpc_cmd_state *state = talloc_get_type_abort(
334 req->async_priv, struct dcerpc_cmd_state);
335 NTSTATUS status;
336 ssize_t nread;
337 bool is_data_outstanding;
338
339 status = np_read_recv(subreq, &nread, &is_data_outstanding);
340 TALLOC_FREE(subreq);
341
342 if (!NT_STATUS_IS_OK(status)) {
343 DEBUG(10, ("Could not read from to pipe: %s\n",
344 nt_errstr(status)));
345 reply_nterror(req, status);
346
347 if (!srv_send_smb(req->sconn, (char *)req->outbuf,
348 true, req->seqnum+1,
349 IS_CONN_ENCRYPTED(req->conn)
350 ||req->encrypted, &req->pcd)) {
351 exit_server_cleanly("api_dcerpc_cmd_read_done: "
352 "srv_send_smb failed.");
353 }
354 TALLOC_FREE(req);
355 return;
356 }
357
358 send_trans_reply(req->conn, req, NULL, 0, (char *)state->data, nread,
359 is_data_outstanding);
360 TALLOC_FREE(req);
361 }
362
363 /****************************************************************************
364 WaitNamedPipeHandleState
365 ****************************************************************************/
366
367 static void api_WNPHS(connection_struct *conn, struct smb_request *req,
368 struct files_struct *fsp, char *param, int param_len)
369 {
370 if (!param || param_len < 2) {
371 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
372 return;
373 }
374
375 DEBUG(4,("WaitNamedPipeHandleState priority %x\n",
376 (int)SVAL(param,0)));
377
378 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
379 }
380
381
382 /****************************************************************************
383 SetNamedPipeHandleState
384 ****************************************************************************/
385
386 static void api_SNPHS(connection_struct *conn, struct smb_request *req,
387 struct files_struct *fsp, char *param, int param_len)
388 {
389 if (!param || param_len < 2) {
390 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
391 return;
392 }
393
394 DEBUG(4,("SetNamedPipeHandleState to code %x\n", (int)SVAL(param,0)));
395
396 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
397 }
398
399
400 /****************************************************************************
401 When no reply is generated, indicate unsupported.
402 ****************************************************************************/
403
404 static void api_no_reply(connection_struct *conn, struct smb_request *req)
405 {
406 char rparam[4];
407
408 /* unsupported */
409 SSVAL(rparam,0,NERR_notsupported);
410 SSVAL(rparam,2,0); /* converter word */
411
412 DEBUG(3,("Unsupported API fd command\n"));
413
414 /* now send the reply */
415 send_trans_reply(conn, req, rparam, 4, NULL, 0, False);
416
417 return;
418 }
419
420 /****************************************************************************
421 Handle remote api calls delivered to a named pipe already opened.
422 ****************************************************************************/
423
424 static void api_fd_reply(connection_struct *conn, uint16 vuid,
425 struct smb_request *req,
426 uint16 *setup, uint8_t *data, char *params,
427 int suwcnt, int tdscnt, int tpscnt,
428 int mdrcnt, int mprcnt)
429 {
430 struct files_struct *fsp;
431 int pnum;
432 int subcommand;
433
434 DEBUG(5,("api_fd_reply\n"));
435
436 /* First find out the name of this file. */
437 if (suwcnt != 2) {
438 DEBUG(0,("Unexpected named pipe transaction.\n"));
439 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
440 return;
441 }
442
443 /* Get the file handle and hence the file name. */
444 /*
445 * NB. The setup array has already been transformed
446 * via SVAL and so is in host byte order.
447 */
448 pnum = ((int)setup[1]) & 0xFFFF;
449 subcommand = ((int)setup[0]) & 0xFFFF;
450
451 fsp = file_fsp(req, pnum);
452
453 if (!fsp_is_np(fsp)) {
454 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
455 /* Win9x does this call with a unicode pipe name, not a pnum. */
456 /* Just return success for now... */
457 DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
458 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
459 return;
460 }
461
462 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
463 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
464 return;
465 }
466
467 if (vuid != fsp->vuid) {
468 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
469 "expected %d\n", pnum, vuid, fsp->vuid));
470 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
471 return;
472 }
473
474 DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n",
475 subcommand, fsp_str_dbg(fsp), pnum));
476
477 DEBUG(10, ("api_fd_reply: p:%p max_trans_reply: %d\n", fsp, mdrcnt));
478
479 switch (subcommand) {
480 case TRANSACT_DCERPCCMD: {
481 /* dce/rpc command */
482 api_dcerpc_cmd(conn, req, fsp, (uint8_t *)data, tdscnt,
483 mdrcnt);
484 break;
485 }
486 case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
487 /* Wait Named Pipe Handle state */
488 api_WNPHS(conn, req, fsp, params, tpscnt);
489 break;
490 case TRANSACT_SETNAMEDPIPEHANDLESTATE:
491 /* Set Named Pipe Handle state */
492 api_SNPHS(conn, req, fsp, params, tpscnt);
493 break;
494 default:
495 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
496 return;
497 }
498 }
499
500 /****************************************************************************
501 Handle named pipe commands.
502 ****************************************************************************/
503
504 static void named_pipe(connection_struct *conn, uint16 vuid,
505 struct smb_request *req,
506 const char *name, uint16 *setup,
507 char *data, char *params,
508 int suwcnt, int tdscnt,int tpscnt,
509 int msrcnt, int mdrcnt, int mprcnt)
510 {
511 DEBUG(3,("named pipe command on <%s> name\n", name));
512
513 if (strequal(name,"LANMAN")) {
514 api_reply(conn, vuid, req,
515 data, params,
516 tdscnt, tpscnt,
517 mdrcnt, mprcnt);
518 return;
519 }
520
521 if (strequal(name,"WKSSVC") ||
522 strequal(name,"SRVSVC") ||
523 strequal(name,"WINREG") ||
524 strequal(name,"SAMR") ||
525 strequal(name,"LSARPC")) {
526
527 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
528
529 api_fd_reply(conn, vuid, req,
530 setup, (uint8_t *)data, params,
531 suwcnt, tdscnt, tpscnt,
532 mdrcnt, mprcnt);
533 return;
534 }
535
536 if (strlen(name) < 1) {
537 api_fd_reply(conn, vuid, req,
538 setup, (uint8_t *)data,
539 params, suwcnt, tdscnt,
540 tpscnt, mdrcnt, mprcnt);
541 return;
542 }
543
544 if (setup)
545 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
546 (int)setup[0],(int)setup[1]));
547
548 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
549 return;
550 }
551
552 static void handle_trans(connection_struct *conn, struct smb_request *req,
553 struct trans_state *state)
554 {
555 char *local_machine_name;
556 int name_offset = 0;
557
558 DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
559 state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
560 (unsigned int)state->setup_count));
561
562 /*
563 * WinCE wierdness....
564 */
565
566 local_machine_name = talloc_asprintf(state, "\\%s\\",
567 get_local_machine_name());
568
569 if (local_machine_name == NULL) {
570 reply_nterror(req, NT_STATUS_NO_MEMORY);
571 return;
572 }
573
574 if (strnequal(state->name, local_machine_name,
575 strlen(local_machine_name))) {
576 name_offset = strlen(local_machine_name)-1;
577 }
578
579 if (!strnequal(&state->name[name_offset], "\\PIPE",
580 strlen("\\PIPE"))) {
581 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
582 return;
583 }
584
585 name_offset += strlen("\\PIPE");
586
587 /* Win9x weirdness. When talking to a unicode server Win9x
588 only sends \PIPE instead of \PIPE\ */
589
590 if (state->name[name_offset] == '\\')
591 name_offset++;
592
593 DEBUG(5,("calling named_pipe\n"));
594 named_pipe(conn, state->vuid, req,
595 state->name+name_offset,
596 state->setup,state->data,
597 state->param,
598 state->setup_count,state->total_data,
599 state->total_param,
600 state->max_setup_return,
601 state->max_data_return,
602 state->max_param_return);
603
604 if (state->close_on_completion) {
605 close_cnum(conn,state->vuid);
606 req->conn = NULL;
607 }
608
609 return;
610 }
611
612 /****************************************************************************
613 Reply to a SMBtrans.
614 ****************************************************************************/
615
616 void reply_trans(struct smb_request *req)
617 {
618 connection_struct *conn = req->conn;
619 unsigned int dsoff;
620 unsigned int dscnt;
621 unsigned int psoff;
622 unsigned int pscnt;
623 struct trans_state *state;
624 NTSTATUS result;
625
626 START_PROFILE(SMBtrans);
627
628 if (req->wct < 14) {
629 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
630 END_PROFILE(SMBtrans);
631 return;
632 }
633
634 dsoff = SVAL(req->vwv+12, 0);
635 dscnt = SVAL(req->vwv+11, 0);
636 psoff = SVAL(req->vwv+10, 0);
637 pscnt = SVAL(req->vwv+9, 0);
638
639 result = allow_new_trans(conn->pending_trans, req->mid);
640 if (!NT_STATUS_IS_OK(result)) {
641 DEBUG(2, ("Got invalid trans request: %s\n",
642 nt_errstr(result)));
643 reply_nterror(req, result);
644 END_PROFILE(SMBtrans);
645 return;
646 }
647
648 if ((state = TALLOC_P(conn, struct trans_state)) == NULL) {
649 DEBUG(0, ("talloc failed\n"));
650 reply_nterror(req, NT_STATUS_NO_MEMORY);
651 END_PROFILE(SMBtrans);
652 return;
653 }
654
655 state->cmd = SMBtrans;
656
657 state->mid = req->mid;
658 state->vuid = req->vuid;
659 state->setup_count = CVAL(req->vwv+13, 0);
660 state->setup = NULL;
661 state->total_param = SVAL(req->vwv+0, 0);
662 state->param = NULL;
663 state->total_data = SVAL(req->vwv+1, 0);
664 state->data = NULL;
665 state->max_param_return = SVAL(req->vwv+2, 0);
666 state->max_data_return = SVAL(req->vwv+3, 0);
667 state->max_setup_return = CVAL(req->vwv+4, 0);
668 state->close_on_completion = BITSETW(req->vwv+5, 0);
669 state->one_way = BITSETW(req->vwv+5, 1);
670
671 srvstr_pull_req_talloc(state, req, &state->name, req->buf,
672 STR_TERMINATE);
673
674 if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
675 !state->name)
676 goto bad_param;
677
678 if (state->total_data) {
679
680 if (trans_oob(state->total_data, 0, dscnt)
681 || trans_oob(smb_len(req->inbuf), dsoff, dscnt)) {
682 goto bad_param;
683 }
684
685 /* Can't use talloc here, the core routines do realloc on the
686 * params and data. Out of paranoia, 100 bytes too many. */
687 state->data = (char *)SMB_MALLOC(state->total_data+100);
688 if (state->data == NULL) {
689 DEBUG(0,("reply_trans: data malloc fail for %u "
690 "bytes !\n", (unsigned int)state->total_data));
691 TALLOC_FREE(state);
692 reply_nterror(req, NT_STATUS_NO_MEMORY);
693 END_PROFILE(SMBtrans);
694 return;
695 }
696 /* null-terminate the slack space */
697 memset(&state->data[state->total_data], 0, 100);
698
699 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
700 }
701
702 if (state->total_param) {
703
704 if (trans_oob(state->total_param, 0, pscnt)
705 || trans_oob(smb_len(req->inbuf), psoff, pscnt)) {
706 goto bad_param;
707 }
708
709 /* Can't use talloc here, the core routines do realloc on the
710 * params and data. Out of paranoia, 100 bytes too many */
711 state->param = (char *)SMB_MALLOC(state->total_param+100);
712 if (state->param == NULL) {
713 DEBUG(0,("reply_trans: param malloc fail for %u "
714 "bytes !\n", (unsigned int)state->total_param));
715 SAFE_FREE(state->data);
716 TALLOC_FREE(state);
717 reply_nterror(req, NT_STATUS_NO_MEMORY);
718 END_PROFILE(SMBtrans);
719 return;
720 }
721 /* null-terminate the slack space */
722 memset(&state->param[state->total_param], 0, 100);
723
724 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
725 }
726
727 state->received_data = dscnt;
728 state->received_param = pscnt;
729
730 if (state->setup_count) {
731 unsigned int i;
732
733 /*
734 * No overflow possible here, state->setup_count is an
735 * unsigned int, being filled by a single byte from
736 * CVAL(req->vwv+13, 0) above. The cast in the comparison
737 * below is not necessary, it's here to clarify things. The
738 * validity of req->vwv and req->wct has been checked in
739 * init_smb_request already.
740 */
741 if (state->setup_count + 14 > (unsigned int)req->wct) {
742 goto bad_param;
743 }
744
745 if((state->setup = TALLOC_ARRAY(
746 state, uint16, state->setup_count)) == NULL) {
747 DEBUG(0,("reply_trans: setup malloc fail for %u "
748 "bytes !\n", (unsigned int)
749 (state->setup_count * sizeof(uint16))));
750 SAFE_FREE(state->data);
751 SAFE_FREE(state->param);
752 TALLOC_FREE(state);
753 reply_nterror(req, NT_STATUS_NO_MEMORY);
754 END_PROFILE(SMBtrans);
755 return;
756 }
757
758 for (i=0;i<state->setup_count;i++) {
759 state->setup[i] = SVAL(req->vwv + 14 + i, 0);
760 }
761 }
762
763 state->received_param = pscnt;
764
765 if ((state->received_param != state->total_param) ||
766 (state->received_data != state->total_data)) {
767 DLIST_ADD(conn->pending_trans, state);
768
769 /* We need to send an interim response then receive the rest
770 of the parameter/data bytes */
771 reply_outbuf(req, 0, 0);
772 show_msg((char *)req->outbuf);
773 END_PROFILE(SMBtrans);
774 return;
775 }
776
777 talloc_steal(talloc_tos(), state);
778
779 handle_trans(conn, req, state);
780
781 SAFE_FREE(state->data);
782 SAFE_FREE(state->param);
783 TALLOC_FREE(state);
784
785 END_PROFILE(SMBtrans);
786 return;
787
788 bad_param:
789
790 DEBUG(0,("reply_trans: invalid trans parameters\n"));
791 SAFE_FREE(state->data);
792 SAFE_FREE(state->param);
793 TALLOC_FREE(state);
794 END_PROFILE(SMBtrans);
795 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
796 return;
797 }
798
799 /****************************************************************************
800 Reply to a secondary SMBtrans.
801 ****************************************************************************/
802
803 void reply_transs(struct smb_request *req)
804 {
805 connection_struct *conn = req->conn;
806 unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
807 struct trans_state *state;
808
809 START_PROFILE(SMBtranss);
810
811 show_msg((char *)req->inbuf);
812
813 if (req->wct < 8) {
814 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
815 END_PROFILE(SMBtranss);
816 return;
817 }
818
819 for (state = conn->pending_trans; state != NULL;
820 state = state->next) {
821 if (state->mid == req->mid) {
822 break;
823 }
824 }
825
826 if ((state == NULL) || (state->cmd != SMBtrans)) {
827 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
828 END_PROFILE(SMBtranss);
829 return;
830 }
831
832 /* Revise total_params and total_data in case they have changed
833 * downwards */
834
835 if (SVAL(req->vwv+0, 0) < state->total_param)
836 state->total_param = SVAL(req->vwv+0, 0);
837 if (SVAL(req->vwv+1, 0) < state->total_data)
838 state->total_data = SVAL(req->vwv+1, 0);
839
840 pcnt = SVAL(req->vwv+2, 0);
841 poff = SVAL(req->vwv+3, 0);
842 pdisp = SVAL(req->vwv+4, 0);
843
844 dcnt = SVAL(req->vwv+5, 0);
845 doff = SVAL(req->vwv+6, 0);
846 ddisp = SVAL(req->vwv+7, 0);
847
848 state->received_param += pcnt;
849 state->received_data += dcnt;
850
851 if ((state->received_data > state->total_data) ||
852 (state->received_param > state->total_param))
853 goto bad_param;
854
855 if (pcnt) {
856 if (trans_oob(state->total_param, pdisp, pcnt)
857 || trans_oob(smb_len(req->inbuf), poff, pcnt)) {
858 goto bad_param;
859 }
860 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,pcnt);
861 }
862
863 if (dcnt) {
864 if (trans_oob(state->total_data, ddisp, dcnt)
865 || trans_oob(smb_len(req->inbuf), doff, dcnt)) {
866 goto bad_param;
867 }
868 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,dcnt);
869 }
870
871 if ((state->received_param < state->total_param) ||
872 (state->received_data < state->total_data)) {
873 END_PROFILE(SMBtranss);
874 return;
875 }
876
877 talloc_steal(talloc_tos(), state);
878
879 handle_trans(conn, req, state);
880
881 DLIST_REMOVE(conn->pending_trans, state);
882 SAFE_FREE(state->data);
883 SAFE_FREE(state->param);
884 TALLOC_FREE(state);
885
886 END_PROFILE(SMBtranss);
887 return;
888
889 bad_param:
890
891 DEBUG(0,("reply_transs: invalid trans parameters\n"));
892 DLIST_REMOVE(conn->pending_trans, state);
893 SAFE_FREE(state->data);
894 SAFE_FREE(state->param);
895 TALLOC_FREE(state);
896 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
897 END_PROFILE(SMBtranss);
898 return;
899 }
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