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tests: Check symlinks are readable as reparse points
[samba.git] / source3 / smbd / smb1_ipc.c
blob716b67b40ea8c2579d31929dfac356246acb3886
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 #include "source3/lib/substitute.h"
33
34 #define NERR_notsupported 50
35
36 static void api_no_reply(connection_struct *conn, struct smb_request *req);
37
38 /*******************************************************************
39 copies parameters and data, as needed, into the smb buffer
40
41 *both* the data and params sections should be aligned. this
42 is fudged in the rpc pipes by
43 at present, only the data section is. this may be a possible
44 cause of some of the ipc problems being experienced. lkcl26dec97
45
46 ******************************************************************/
47
48 static void copy_trans_params_and_data(char *outbuf, int align,
49 char *rparam, int param_offset, int param_len,
50 char *rdata, int data_offset, int data_len)
51 {
52 char *copy_into = smb_buf(outbuf);
53
54 if(param_len < 0)
55 param_len = 0;
56
57 if(data_len < 0)
58 data_len = 0;
59
60 DEBUG(5,("copy_trans_params_and_data: params[%d..%d] data[%d..%d] (align %d)\n",
61 param_offset, param_offset + param_len,
62 data_offset , data_offset + data_len,
63 align));
64
65 *copy_into = '\0';
66
67 copy_into += 1;
68
69 if (param_len)
70 memcpy(copy_into, &rparam[param_offset], param_len);
71
72 copy_into += param_len;
73 if (align) {
74 memset(copy_into, '\0', align);
75 }
76
77 copy_into += align;
78
79 if (data_len )
80 memcpy(copy_into, &rdata[data_offset], data_len);
81 }
82
83 /****************************************************************************
84 Send a trans reply.
85 ****************************************************************************/
86
87 void send_trans_reply(connection_struct *conn,
88 struct smb_request *req,
89 char *rparam, int rparam_len,
90 char *rdata, int rdata_len,
91 bool buffer_too_large)
92 {
93 int this_ldata,this_lparam;
94 int tot_data_sent = 0;
95 int tot_param_sent = 0;
96 int align;
97
98 int ldata = rdata ? rdata_len : 0;
99 int lparam = rparam ? rparam_len : 0;
100 struct smbXsrv_connection *xconn = req->xconn;
101 int max_send = xconn->smb1.sessions.max_send;
102 /* HACK: make sure we send at least 128 byte in one go */
103 int hdr_overhead = SMB_BUFFER_SIZE_MIN - 128;
104
105 if (buffer_too_large)
106 DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
107
108 this_lparam = MIN(lparam,max_send - hdr_overhead);
109 this_ldata = MIN(ldata,max_send - (hdr_overhead+this_lparam));
110
111 align = ((this_lparam)%4);
112
113 reply_smb1_outbuf(req, 10, 1+align+this_ldata+this_lparam);
114
115 /*
116 * We might have SMBtranss in req which was transferred to the outbuf,
117 * fix that.
118 */
119 SCVAL(req->outbuf, smb_com, SMBtrans);
120
121 copy_trans_params_and_data((char *)req->outbuf, align,
122 rparam, tot_param_sent, this_lparam,
123 rdata, tot_data_sent, this_ldata);
124
125 SSVAL(req->outbuf,smb_vwv0,lparam);
126 SSVAL(req->outbuf,smb_vwv1,ldata);
127 SSVAL(req->outbuf,smb_vwv3,this_lparam);
128 SSVAL(req->outbuf,smb_vwv4,
129 smb_offset(smb_buf(req->outbuf)+1, req->outbuf));
130 SSVAL(req->outbuf,smb_vwv5,0);
131 SSVAL(req->outbuf,smb_vwv6,this_ldata);
132 SSVAL(req->outbuf,smb_vwv7,
133 smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
134 req->outbuf));
135 SSVAL(req->outbuf,smb_vwv8,0);
136 SSVAL(req->outbuf,smb_vwv9,0);
137
138 if (buffer_too_large) {
139 error_packet_set((char *)req->outbuf, ERRDOS, ERRmoredata,
140 STATUS_BUFFER_OVERFLOW, __LINE__, __FILE__);
141 }
142
143 show_msg((char *)req->outbuf);
144 if (!smb1_srv_send(xconn,
145 (char *)req->outbuf,
146 true,
147 req->seqnum + 1,
148 IS_CONN_ENCRYPTED(conn))) {
149 exit_server_cleanly("send_trans_reply: smb1_srv_send failed.");
150 }
151
152 TALLOC_FREE(req->outbuf);
153
154 tot_data_sent = this_ldata;
155 tot_param_sent = this_lparam;
156
157 while (tot_data_sent < ldata || tot_param_sent < lparam)
158 {
159 this_lparam = MIN(lparam-tot_param_sent,
160 max_send - hdr_overhead);
161 this_ldata = MIN(ldata -tot_data_sent,
162 max_send - (hdr_overhead+this_lparam));
163
164 if(this_lparam < 0)
165 this_lparam = 0;
166
167 if(this_ldata < 0)
168 this_ldata = 0;
169
170 align = (this_lparam%4);
171
172 reply_smb1_outbuf(req, 10, 1+align+this_ldata+this_lparam);
173
174 /*
175 * We might have SMBtranss in req which was transferred to the
176 * outbuf, fix that.
177 */
178 SCVAL(req->outbuf, smb_com, SMBtrans);
179
180 copy_trans_params_and_data((char *)req->outbuf, align,
181 rparam, tot_param_sent, this_lparam,
182 rdata, tot_data_sent, this_ldata);
183
184 SSVAL(req->outbuf,smb_vwv0,lparam);
185 SSVAL(req->outbuf,smb_vwv1,ldata);
186
187 SSVAL(req->outbuf,smb_vwv3,this_lparam);
188 SSVAL(req->outbuf,smb_vwv4,
189 smb_offset(smb_buf(req->outbuf)+1,req->outbuf));
190 SSVAL(req->outbuf,smb_vwv5,tot_param_sent);
191 SSVAL(req->outbuf,smb_vwv6,this_ldata);
192 SSVAL(req->outbuf,smb_vwv7,
193 smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
194 req->outbuf));
195 SSVAL(req->outbuf,smb_vwv8,tot_data_sent);
196 SSVAL(req->outbuf,smb_vwv9,0);
197
198 if (buffer_too_large) {
199 error_packet_set((char *)req->outbuf,
200 ERRDOS, ERRmoredata,
201 STATUS_BUFFER_OVERFLOW,
202 __LINE__, __FILE__);
203 }
204
205 show_msg((char *)req->outbuf);
206 if (!smb1_srv_send(xconn,
207 (char *)req->outbuf,
208 true,
209 req->seqnum + 1,
210 IS_CONN_ENCRYPTED(conn))) {
211 exit_server_cleanly("send_trans_reply: smb1_srv_send "
212 "failed.");
213 }
214
215 tot_data_sent += this_ldata;
216 tot_param_sent += this_lparam;
217 TALLOC_FREE(req->outbuf);
218 }
219 }
220
221 /****************************************************************************
222 Start the first part of an RPC reply which began with an SMBtrans request.
223 ****************************************************************************/
224
225 struct dcerpc_cmd_state {
226 struct fake_file_handle *handle;
227 uint8_t *data;
228 size_t num_data;
229 size_t max_read;
230 };
231
232 static void api_dcerpc_cmd_write_done(struct tevent_req *subreq);
233 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq);
234
235 static void api_dcerpc_cmd(connection_struct *conn, struct smb_request *req,
236 files_struct *fsp, uint8_t *data, size_t length,
237 size_t max_read)
238 {
239 struct tevent_req *subreq;
240 struct dcerpc_cmd_state *state;
241 bool busy;
242
243 if (!fsp_is_np(fsp)) {
244 api_no_reply(conn, req);
245 return;
246 }
247
248 /*
249 * Trans requests are only allowed
250 * if no other Trans or Read is active
251 */
252 busy = np_read_in_progress(fsp->fake_file_handle);
253 if (busy) {
254 reply_nterror(req, NT_STATUS_PIPE_BUSY);
255 return;
256 }
257
258 state = talloc(req, struct dcerpc_cmd_state);
259 if (state == NULL) {
260 reply_nterror(req, NT_STATUS_NO_MEMORY);
261 return;
262 }
263 req->async_priv = state;
264
265 state->handle = fsp->fake_file_handle;
266
267 /*
268 * This memdup severely sucks. But doing it properly essentially means
269 * to rewrite lanman.c, something which I don't really want to do now.
270 */
271 state->data = (uint8_t *)talloc_memdup(state, data, length);
272 if (state->data == NULL) {
273 reply_nterror(req, NT_STATUS_NO_MEMORY);
274 return;
275 }
276 state->num_data = length;
277 state->max_read = max_read;
278
279 subreq = np_write_send(state, req->sconn->ev_ctx, state->handle,
280 state->data, length);
281 if (subreq == NULL) {
282 TALLOC_FREE(state);
283 reply_nterror(req, NT_STATUS_NO_MEMORY);
284 return;
285 }
286 tevent_req_set_callback(subreq, api_dcerpc_cmd_write_done,
287 talloc_move(conn, &req));
288 }
289
290 static void api_dcerpc_cmd_write_done(struct tevent_req *subreq)
291 {
292 struct smb_request *req = tevent_req_callback_data(
293 subreq, struct smb_request);
294 struct dcerpc_cmd_state *state = talloc_get_type_abort(
295 req->async_priv, struct dcerpc_cmd_state);
296 NTSTATUS status;
297 ssize_t nwritten = -1;
298
299 status = np_write_recv(subreq, &nwritten);
300 TALLOC_FREE(subreq);
301 if (!NT_STATUS_IS_OK(status)) {
302 NTSTATUS old = status;
303 status = nt_status_np_pipe(old);
304
305 DEBUG(10, ("Could not write to pipe: %s%s%s\n",
306 nt_errstr(old),
307 NT_STATUS_EQUAL(old, status)?"":" => ",
308 NT_STATUS_EQUAL(old, status)?"":nt_errstr(status)));
309 reply_nterror(req, status);
310 goto send;
311 }
312 if (nwritten != state->num_data) {
313 status = NT_STATUS_PIPE_NOT_AVAILABLE;
314 DEBUG(10, ("Could not write to pipe: (%d/%d) => %s\n",
315 (int)state->num_data,
316 (int)nwritten, nt_errstr(status)));
317 reply_nterror(req, status);
318 goto send;
319 }
320
321 state->data = talloc_realloc(state, state->data, uint8_t,
322 state->max_read);
323 if (state->data == NULL) {
324 reply_nterror(req, NT_STATUS_NO_MEMORY);
325 goto send;
326 }
327
328 subreq = np_read_send(state, req->sconn->ev_ctx,
329 state->handle, state->data, state->max_read);
330 if (subreq == NULL) {
331 reply_nterror(req, NT_STATUS_NO_MEMORY);
332 goto send;
333 }
334 tevent_req_set_callback(subreq, api_dcerpc_cmd_read_done, req);
335 return;
336
337 send:
338 if (!smb1_srv_send(req->xconn,
339 (char *)req->outbuf,
340 true,
341 req->seqnum + 1,
342 IS_CONN_ENCRYPTED(req->conn) || req->encrypted)) {
343 exit_server_cleanly("api_dcerpc_cmd_write_done: "
344 "smb1_srv_send failed.");
345 }
346 TALLOC_FREE(req);
347 }
348
349 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq)
350 {
351 struct smb_request *req = tevent_req_callback_data(
352 subreq, struct smb_request);
353 struct dcerpc_cmd_state *state = talloc_get_type_abort(
354 req->async_priv, struct dcerpc_cmd_state);
355 NTSTATUS status;
356 ssize_t nread;
357 bool is_data_outstanding;
358
359 status = np_read_recv(subreq, &nread, &is_data_outstanding);
360 TALLOC_FREE(subreq);
361
362 if (!NT_STATUS_IS_OK(status)) {
363 NTSTATUS old = status;
364 status = nt_status_np_pipe(old);
365
366 DEBUG(10, ("Could not read from to pipe: %s%s%s\n",
367 nt_errstr(old),
368 NT_STATUS_EQUAL(old, status)?"":" => ",
369 NT_STATUS_EQUAL(old, status)?"":nt_errstr(status)));
370 reply_nterror(req, status);
371
372 if (!smb1_srv_send(req->xconn,
373 (char *)req->outbuf,
374 true,
375 req->seqnum + 1,
376 IS_CONN_ENCRYPTED(req->conn) ||
377 req->encrypted)) {
378 exit_server_cleanly("api_dcerpc_cmd_read_done: "
379 "smb1_srv_send failed.");
380 }
381 TALLOC_FREE(req);
382 return;
383 }
384
385 send_trans_reply(req->conn, req, NULL, 0, (char *)state->data, nread,
386 is_data_outstanding);
387 TALLOC_FREE(req);
388 }
389
390 /****************************************************************************
391 WaitNamedPipeHandleState
392 ****************************************************************************/
393
394 static void api_WNPHS(connection_struct *conn, struct smb_request *req,
395 struct files_struct *fsp, char *param, int param_len)
396 {
397 if (!param || param_len < 2) {
398 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
399 return;
400 }
401
402 DEBUG(4,("WaitNamedPipeHandleState priority %x\n",
403 (int)SVAL(param,0)));
404
405 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
406 }
407
408
409 /****************************************************************************
410 SetNamedPipeHandleState
411 ****************************************************************************/
412
413 static void api_SNPHS(connection_struct *conn, struct smb_request *req,
414 struct files_struct *fsp, char *param, int param_len)
415 {
416 if (!param || param_len < 2) {
417 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
418 return;
419 }
420
421 DEBUG(4,("SetNamedPipeHandleState to code %x\n", (int)SVAL(param,0)));
422
423 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
424 }
425
426
427 /****************************************************************************
428 When no reply is generated, indicate unsupported.
429 ****************************************************************************/
430
431 static void api_no_reply(connection_struct *conn, struct smb_request *req)
432 {
433 char rparam[4];
434
435 /* unsupported */
436 SSVAL(rparam,0,NERR_notsupported);
437 SSVAL(rparam,2,0); /* converter word */
438
439 DEBUG(3,("Unsupported API fd command\n"));
440
441 /* now send the reply */
442 send_trans_reply(conn, req, rparam, 4, NULL, 0, False);
443
444 return;
445 }
446
447 /****************************************************************************
448 Handle remote api calls delivered to a named pipe already opened.
449 ****************************************************************************/
450
451 static void api_fd_reply(connection_struct *conn, uint64_t vuid,
452 struct smb_request *req,
453 uint16_t *setup, uint8_t *data, char *params,
454 int suwcnt, int tdscnt, int tpscnt,
455 int mdrcnt, int mprcnt)
456 {
457 struct files_struct *fsp;
458 int pnum;
459 int subcommand;
460
461 DEBUG(5,("api_fd_reply\n"));
462
463 /* First find out the name of this file. */
464 if (suwcnt != 2) {
465 DEBUG(0,("Unexpected named pipe transaction.\n"));
466 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
467 return;
468 }
469
470 /* Get the file handle and hence the file name. */
471 /*
472 * NB. The setup array has already been transformed
473 * via SVAL and so is in host byte order.
474 */
475 pnum = ((int)setup[1]) & 0xFFFF;
476 subcommand = ((int)setup[0]) & 0xFFFF;
477
478 fsp = file_fsp(req, pnum);
479
480 if (!fsp_is_np(fsp)) {
481 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
482 /* Win9x does this call with a unicode pipe name, not a pnum. */
483 /* Just return success for now... */
484 DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
485 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
486 return;
487 }
488
489 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
490 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
491 return;
492 }
493
494 if (vuid != fsp->vuid) {
495 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %llu, "
496 "expected %llu\n", pnum, (unsigned long long)vuid,
497 (unsigned long long)fsp->vuid));
498 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
499 return;
500 }
501
502 DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n",
503 subcommand, fsp_str_dbg(fsp), pnum));
504
505 DEBUG(10, ("api_fd_reply: p:%p max_trans_reply: %d\n", fsp, mdrcnt));
506
507 switch (subcommand) {
508 case TRANSACT_DCERPCCMD: {
509 /* dce/rpc command */
510 api_dcerpc_cmd(conn, req, fsp, (uint8_t *)data, tdscnt,
511 mdrcnt);
512 break;
513 }
514 case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
515 /* Wait Named Pipe Handle state */
516 api_WNPHS(conn, req, fsp, params, tpscnt);
517 break;
518 case TRANSACT_SETNAMEDPIPEHANDLESTATE:
519 /* Set Named Pipe Handle state */
520 api_SNPHS(conn, req, fsp, params, tpscnt);
521 break;
522 default:
523 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
524 return;
525 }
526 }
527
528 /****************************************************************************
529 Handle named pipe commands.
530 ****************************************************************************/
531
532 static void named_pipe(connection_struct *conn, uint64_t vuid,
533 struct smb_request *req,
534 const char *name, uint16_t *setup,
535 char *data, char *params,
536 int suwcnt, int tdscnt,int tpscnt,
537 int msrcnt, int mdrcnt, int mprcnt)
538 {
539 DEBUG(3,("named pipe command on <%s> name\n", name));
540
541 if (strequal(name,"LANMAN")) {
542 api_reply(conn, vuid, req,
543 data, params,
544 tdscnt, tpscnt,
545 mdrcnt, mprcnt);
546 return;
547 }
548
549 if (strequal(name,"WKSSVC") ||
550 strequal(name,"SRVSVC") ||
551 strequal(name,"WINREG") ||
552 strequal(name,"SAMR") ||
553 strequal(name,"LSARPC")) {
554
555 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
556
557 api_fd_reply(conn, vuid, req,
558 setup, (uint8_t *)data, params,
559 suwcnt, tdscnt, tpscnt,
560 mdrcnt, mprcnt);
561 return;
562 }
563
564 if (strlen(name) < 1) {
565 api_fd_reply(conn, vuid, req,
566 setup, (uint8_t *)data,
567 params, suwcnt, tdscnt,
568 tpscnt, mdrcnt, mprcnt);
569 return;
570 }
571
572 if (setup)
573 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
574 (int)setup[0],(int)setup[1]));
575
576 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
577 return;
578 }
579
580 static void handle_trans(connection_struct *conn, struct smb_request *req,
581 struct trans_state *state)
582 {
583 char *local_machine_name;
584 int name_offset = 0;
585
586 DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
587 state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
588 (unsigned int)state->setup_count));
589
590 /*
591 * WinCE weirdness....
592 */
593
594 local_machine_name = talloc_asprintf(state, "\\%s\\",
595 get_local_machine_name());
596
597 if (local_machine_name == NULL) {
598 reply_nterror(req, NT_STATUS_NO_MEMORY);
599 return;
600 }
601
602 if (strnequal(state->name, local_machine_name,
603 strlen(local_machine_name))) {
604 name_offset = strlen(local_machine_name)-1;
605 }
606
607 if (!strnequal(&state->name[name_offset], "\\PIPE",
608 strlen("\\PIPE"))) {
609 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
610 return;
611 }
612
613 name_offset += strlen("\\PIPE");
614
615 /* Win9x weirdness. When talking to a unicode server Win9x
616 only sends \PIPE instead of \PIPE\ */
617
618 if (state->name[name_offset] == '\\')
619 name_offset++;
620
621 DEBUG(5,("calling named_pipe\n"));
622 named_pipe(conn, state->vuid, req,
623 state->name+name_offset,
624 state->setup,state->data,
625 state->param,
626 state->setup_count,state->total_data,
627 state->total_param,
628 state->max_setup_return,
629 state->max_data_return,
630 state->max_param_return);
631
632 if (state->close_on_completion) {
633 struct smbXsrv_tcon *tcon;
634 NTSTATUS status;
635
636 tcon = conn->tcon;
637 req->conn = NULL;
638 conn = NULL;
639
640 /*
641 * TODO: cancel all outstanding requests on the tcon
642 */
643 status = smbXsrv_tcon_disconnect(tcon, state->vuid);
644 if (!NT_STATUS_IS_OK(status)) {
645 DEBUG(0, ("handle_trans: "
646 "smbXsrv_tcon_disconnect() failed: %s\n",
647 nt_errstr(status)));
648 /*
649 * If we hit this case, there is something completely
650 * wrong, so we better disconnect the transport connection.
651 */
652 exit_server(__location__ ": smbXsrv_tcon_disconnect failed");
653 return;
654 }
655
656 TALLOC_FREE(tcon);
657 }
658
659 return;
660 }
661
662 /****************************************************************************
663 Reply to a SMBtrans.
664 ****************************************************************************/
665
666 void reply_trans(struct smb_request *req)
667 {
668 connection_struct *conn = req->conn;
669 unsigned int dsoff;
670 unsigned int dscnt;
671 unsigned int psoff;
672 unsigned int pscnt;
673 struct trans_state *state;
674 NTSTATUS result;
675
676 START_PROFILE(SMBtrans);
677
678 if (req->wct < 14) {
679 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
680 END_PROFILE(SMBtrans);
681 return;
682 }
683
684 dsoff = SVAL(req->vwv+12, 0);
685 dscnt = SVAL(req->vwv+11, 0);
686 psoff = SVAL(req->vwv+10, 0);
687 pscnt = SVAL(req->vwv+9, 0);
688
689 result = allow_new_trans(conn->pending_trans, req->mid);
690 if (!NT_STATUS_IS_OK(result)) {
691 DEBUG(2, ("Got invalid trans request: %s\n",
692 nt_errstr(result)));
693 reply_nterror(req, result);
694 END_PROFILE(SMBtrans);
695 return;
696 }
697
698 if ((state = talloc_zero(conn, struct trans_state)) == NULL) {
699 DEBUG(0, ("talloc failed\n"));
700 reply_nterror(req, NT_STATUS_NO_MEMORY);
701 END_PROFILE(SMBtrans);
702 return;
703 }
704
705 state->cmd = SMBtrans;
706
707 state->mid = req->mid;
708 state->vuid = req->vuid;
709 state->setup_count = CVAL(req->vwv+13, 0);
710 state->setup = NULL;
711 state->total_param = SVAL(req->vwv+0, 0);
712 state->param = NULL;
713 state->total_data = SVAL(req->vwv+1, 0);
714 state->data = NULL;
715 state->max_param_return = SVAL(req->vwv+2, 0);
716 state->max_data_return = SVAL(req->vwv+3, 0);
717 state->max_setup_return = CVAL(req->vwv+4, 0);
718 state->close_on_completion = BITSETW(req->vwv+5, 0);
719 state->one_way = BITSETW(req->vwv+5, 1);
720
721 srvstr_pull_req_talloc(state, req, &state->name, req->buf,
722 STR_TERMINATE);
723
724 if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
725 !state->name)
726 goto bad_param;
727
728 if (state->total_data) {
729
730 if (smb_buffer_oob(state->total_data, 0, dscnt)
731 || smb_buffer_oob(smb_len(req->inbuf), dsoff, dscnt)) {
732 goto bad_param;
733 }
734
735 /* Can't use talloc here, the core routines do realloc on the
736 * params and data. Out of paranoia, 100 bytes too many. */
737 state->data = (char *)SMB_MALLOC(state->total_data+100);
738 if (state->data == NULL) {
739 DEBUG(0,("reply_trans: data malloc fail for %u "
740 "bytes !\n", (unsigned int)state->total_data));
741 TALLOC_FREE(state);
742 reply_nterror(req, NT_STATUS_NO_MEMORY);
743 END_PROFILE(SMBtrans);
744 return;
745 }
746 /* null-terminate the slack space */
747 memset(&state->data[state->total_data], 0, 100);
748
749 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
750 }
751
752 if (state->total_param) {
753
754 if (smb_buffer_oob(state->total_param, 0, pscnt)
755 || smb_buffer_oob(smb_len(req->inbuf), psoff, pscnt)) {
756 goto bad_param;
757 }
758
759 /* Can't use talloc here, the core routines do realloc on the
760 * params and data. Out of paranoia, 100 bytes too many */
761 state->param = (char *)SMB_MALLOC(state->total_param+100);
762 if (state->param == NULL) {
763 DEBUG(0,("reply_trans: param malloc fail for %u "
764 "bytes !\n", (unsigned int)state->total_param));
765 SAFE_FREE(state->data);
766 TALLOC_FREE(state);
767 reply_nterror(req, NT_STATUS_NO_MEMORY);
768 END_PROFILE(SMBtrans);
769 return;
770 }
771 /* null-terminate the slack space */
772 memset(&state->param[state->total_param], 0, 100);
773
774 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
775 }
776
777 state->received_data = dscnt;
778 state->received_param = pscnt;
779
780 if (state->setup_count) {
781 unsigned int i;
782
783 /*
784 * No overflow possible here, state->setup_count is an
785 * unsigned int, being filled by a single byte from
786 * CVAL(req->vwv+13, 0) above. The cast in the comparison
787 * below is not necessary, it's here to clarify things. The
788 * validity of req->vwv and req->wct has been checked in
789 * init_smb1_request already.
790 */
791 if (state->setup_count + 14 > (unsigned int)req->wct) {
792 goto bad_param;
793 }
794
795 if((state->setup = talloc_array(
796 state, uint16_t, state->setup_count)) == NULL) {
797 DEBUG(0,("reply_trans: setup malloc fail for %u "
798 "bytes !\n", (unsigned int)
799 (state->setup_count * sizeof(uint16_t))));
800 SAFE_FREE(state->data);
801 SAFE_FREE(state->param);
802 TALLOC_FREE(state);
803 reply_nterror(req, NT_STATUS_NO_MEMORY);
804 END_PROFILE(SMBtrans);
805 return;
806 }
807
808 for (i=0;i<state->setup_count;i++) {
809 state->setup[i] = SVAL(req->vwv + 14 + i, 0);
810 }
811 }
812
813 state->received_param = pscnt;
814
815 if ((state->received_param != state->total_param) ||
816 (state->received_data != state->total_data)) {
817 DLIST_ADD(conn->pending_trans, state);
818
819 /* We need to send an interim response then receive the rest
820 of the parameter/data bytes */
821 reply_smb1_outbuf(req, 0, 0);
822 show_msg((char *)req->outbuf);
823 END_PROFILE(SMBtrans);
824 return;
825 }
826
827 talloc_steal(talloc_tos(), state);
828
829 handle_trans(conn, req, state);
830
831 SAFE_FREE(state->data);
832 SAFE_FREE(state->param);
833 TALLOC_FREE(state);
834
835 END_PROFILE(SMBtrans);
836 return;
837
838 bad_param:
839
840 DEBUG(0,("reply_trans: invalid trans parameters\n"));
841 SAFE_FREE(state->data);
842 SAFE_FREE(state->param);
843 TALLOC_FREE(state);
844 END_PROFILE(SMBtrans);
845 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
846 return;
847 }
848
849 /****************************************************************************
850 Reply to a secondary SMBtrans.
851 ****************************************************************************/
852
853 void reply_transs(struct smb_request *req)
854 {
855 connection_struct *conn = req->conn;
856 unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
857 struct trans_state *state;
858
859 START_PROFILE(SMBtranss);
860
861 show_msg((const char *)req->inbuf);
862
863 if (req->wct < 8) {
864 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
865 END_PROFILE(SMBtranss);
866 return;
867 }
868
869 for (state = conn->pending_trans; state != NULL;
870 state = state->next) {
871 if (state->mid == req->mid) {
872 break;
873 }
874 }
875
876 if ((state == NULL) || (state->cmd != SMBtrans)) {
877 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
878 END_PROFILE(SMBtranss);
879 return;
880 }
881
882 /* Revise total_params and total_data in case they have changed
883 * downwards */
884
885 if (SVAL(req->vwv+0, 0) < state->total_param)
886 state->total_param = SVAL(req->vwv+0, 0);
887 if (SVAL(req->vwv+1, 0) < state->total_data)
888 state->total_data = SVAL(req->vwv+1, 0);
889
890 pcnt = SVAL(req->vwv+2, 0);
891 poff = SVAL(req->vwv+3, 0);
892 pdisp = SVAL(req->vwv+4, 0);
893
894 dcnt = SVAL(req->vwv+5, 0);
895 doff = SVAL(req->vwv+6, 0);
896 ddisp = SVAL(req->vwv+7, 0);
897
898 state->received_param += pcnt;
899 state->received_data += dcnt;
900
901 if ((state->received_data > state->total_data) ||
902 (state->received_param > state->total_param))
903 goto bad_param;
904
905 if (pcnt) {
906 if (smb_buffer_oob(state->total_param, pdisp, pcnt)
907 || smb_buffer_oob(smb_len(req->inbuf), poff, pcnt)) {
908 goto bad_param;
909 }
910 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,pcnt);
911 }
912
913 if (dcnt) {
914 if (smb_buffer_oob(state->total_data, ddisp, dcnt)
915 || smb_buffer_oob(smb_len(req->inbuf), doff, dcnt)) {
916 goto bad_param;
917 }
918 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,dcnt);
919 }
920
921 if ((state->received_param < state->total_param) ||
922 (state->received_data < state->total_data)) {
923 END_PROFILE(SMBtranss);
924 return;
925 }
926
927 talloc_steal(talloc_tos(), state);
928
929 handle_trans(conn, req, state);
930
931 DLIST_REMOVE(conn->pending_trans, state);
932 SAFE_FREE(state->data);
933 SAFE_FREE(state->param);
934 TALLOC_FREE(state);
935
936 END_PROFILE(SMBtranss);
937 return;
938
939 bad_param:
940
941 DEBUG(0,("reply_transs: invalid trans parameters\n"));
942 DLIST_REMOVE(conn->pending_trans, state);
943 SAFE_FREE(state->data);
944 SAFE_FREE(state->param);
945 TALLOC_FREE(state);
946 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
947 END_PROFILE(SMBtranss);
948 return;
949 }
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