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ECLIPSE + PyDev Project
[Samba/kamenim.git] / source3 / smbd / ipc.c
blob97b338a536e757a1af0ffb4b1aca2307b38d9fea
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 = smbd_server_conn;
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
231 if (!fsp_is_np(fsp)) {
232 api_no_reply(conn, req);
233 return;
234 }
235
236 state = talloc(req, struct dcerpc_cmd_state);
237 if (state == NULL) {
238 reply_nterror(req, NT_STATUS_NO_MEMORY);
239 return;
240 }
241 req->async_priv = state;
242
243 state->handle = fsp->fake_file_handle;
244
245 /*
246 * This memdup severely sucks. But doing it properly essentially means
247 * to rewrite lanman.c, something which I don't really want to do now.
248 */
249 state->data = (uint8_t *)talloc_memdup(state, data, length);
250 if (state->data == NULL) {
251 reply_nterror(req, NT_STATUS_NO_MEMORY);
252 return;
253 }
254 state->num_data = length;
255 state->max_read = max_read;
256
257 subreq = np_write_send(state, smbd_event_context(), state->handle,
258 state->data, length);
259 if (subreq == NULL) {
260 TALLOC_FREE(state);
261 reply_nterror(req, NT_STATUS_NO_MEMORY);
262 return;
263 }
264 tevent_req_set_callback(subreq, api_dcerpc_cmd_write_done,
265 talloc_move(conn, &req));
266 }
267
268 static void api_dcerpc_cmd_write_done(struct tevent_req *subreq)
269 {
270 struct smb_request *req = tevent_req_callback_data(
271 subreq, struct smb_request);
272 struct dcerpc_cmd_state *state = talloc_get_type_abort(
273 req->async_priv, struct dcerpc_cmd_state);
274 NTSTATUS status;
275 ssize_t nwritten = -1;
276
277 status = np_write_recv(subreq, &nwritten);
278 TALLOC_FREE(subreq);
279 if (!NT_STATUS_IS_OK(status) || (nwritten != state->num_data)) {
280 DEBUG(10, ("Could not write to pipe: %s (%d/%d)\n",
281 nt_errstr(status), (int)state->num_data,
282 (int)nwritten));
283 reply_nterror(req, NT_STATUS_PIPE_NOT_AVAILABLE);
284 goto send;
285 }
286
287 state->data = TALLOC_REALLOC_ARRAY(state, state->data, uint8_t,
288 state->max_read);
289 if (state->data == NULL) {
290 reply_nterror(req, NT_STATUS_NO_MEMORY);
291 goto send;
292 }
293
294 subreq = np_read_send(req->conn, smbd_event_context(),
295 state->handle, state->data, state->max_read);
296 if (subreq == NULL) {
297 reply_nterror(req, NT_STATUS_NO_MEMORY);
298 goto send;
299 }
300 tevent_req_set_callback(subreq, api_dcerpc_cmd_read_done, req);
301 return;
302
303 send:
304 if (!srv_send_smb(
305 smbd_server_fd(), (char *)req->outbuf,
306 true, req->seqnum+1,
307 IS_CONN_ENCRYPTED(req->conn) || req->encrypted,
308 &req->pcd)) {
309 exit_server_cleanly("construct_reply: srv_send_smb failed.");
310 }
311 TALLOC_FREE(req);
312 }
313
314 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq)
315 {
316 struct smb_request *req = tevent_req_callback_data(
317 subreq, struct smb_request);
318 struct dcerpc_cmd_state *state = talloc_get_type_abort(
319 req->async_priv, struct dcerpc_cmd_state);
320 NTSTATUS status;
321 ssize_t nread;
322 bool is_data_outstanding;
323
324 status = np_read_recv(subreq, &nread, &is_data_outstanding);
325 TALLOC_FREE(subreq);
326
327 if (!NT_STATUS_IS_OK(status)) {
328 DEBUG(10, ("Could not read from to pipe: %s\n",
329 nt_errstr(status)));
330 reply_nterror(req, status);
331
332 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
333 true, req->seqnum+1,
334 IS_CONN_ENCRYPTED(req->conn)
335 ||req->encrypted, &req->pcd)) {
336 exit_server_cleanly("construct_reply: srv_send_smb "
337 "failed.");
338 }
339 TALLOC_FREE(req);
340 return;
341 }
342
343 send_trans_reply(req->conn, req, NULL, 0, (char *)state->data, nread,
344 is_data_outstanding);
345 TALLOC_FREE(req);
346 }
347
348 /****************************************************************************
349 WaitNamedPipeHandleState
350 ****************************************************************************/
351
352 static void api_WNPHS(connection_struct *conn, struct smb_request *req,
353 struct files_struct *fsp, char *param, int param_len)
354 {
355 if (!param || param_len < 2) {
356 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
357 return;
358 }
359
360 DEBUG(4,("WaitNamedPipeHandleState priority %x\n",
361 (int)SVAL(param,0)));
362
363 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
364 }
365
366
367 /****************************************************************************
368 SetNamedPipeHandleState
369 ****************************************************************************/
370
371 static void api_SNPHS(connection_struct *conn, struct smb_request *req,
372 struct files_struct *fsp, char *param, int param_len)
373 {
374 if (!param || param_len < 2) {
375 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
376 return;
377 }
378
379 DEBUG(4,("SetNamedPipeHandleState to code %x\n", (int)SVAL(param,0)));
380
381 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
382 }
383
384
385 /****************************************************************************
386 When no reply is generated, indicate unsupported.
387 ****************************************************************************/
388
389 static void api_no_reply(connection_struct *conn, struct smb_request *req)
390 {
391 char rparam[4];
392
393 /* unsupported */
394 SSVAL(rparam,0,NERR_notsupported);
395 SSVAL(rparam,2,0); /* converter word */
396
397 DEBUG(3,("Unsupported API fd command\n"));
398
399 /* now send the reply */
400 send_trans_reply(conn, req, rparam, 4, NULL, 0, False);
401
402 return;
403 }
404
405 /****************************************************************************
406 Handle remote api calls delivered to a named pipe already opened.
407 ****************************************************************************/
408
409 static void api_fd_reply(connection_struct *conn, uint16 vuid,
410 struct smb_request *req,
411 uint16 *setup, uint8_t *data, char *params,
412 int suwcnt, int tdscnt, int tpscnt,
413 int mdrcnt, int mprcnt)
414 {
415 struct files_struct *fsp;
416 int pnum;
417 int subcommand;
418
419 DEBUG(5,("api_fd_reply\n"));
420
421 /* First find out the name of this file. */
422 if (suwcnt != 2) {
423 DEBUG(0,("Unexpected named pipe transaction.\n"));
424 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
425 return;
426 }
427
428 /* Get the file handle and hence the file name. */
429 /*
430 * NB. The setup array has already been transformed
431 * via SVAL and so is in host byte order.
432 */
433 pnum = ((int)setup[1]) & 0xFFFF;
434 subcommand = ((int)setup[0]) & 0xFFFF;
435
436 fsp = file_fsp(req, pnum);
437
438 if (!fsp_is_np(fsp)) {
439 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
440 /* Win9x does this call with a unicode pipe name, not a pnum. */
441 /* Just return success for now... */
442 DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
443 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
444 return;
445 }
446
447 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
448 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
449 return;
450 }
451
452 if (vuid != fsp->vuid) {
453 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
454 "expected %d\n", pnum, vuid, fsp->vuid));
455 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
456 return;
457 }
458
459 DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n",
460 subcommand, fsp_str_dbg(fsp), pnum));
461
462 DEBUG(10, ("api_fd_reply: p:%p max_trans_reply: %d\n", fsp, mdrcnt));
463
464 switch (subcommand) {
465 case TRANSACT_DCERPCCMD: {
466 /* dce/rpc command */
467 api_dcerpc_cmd(conn, req, fsp, (uint8_t *)data, tdscnt,
468 mdrcnt);
469 break;
470 }
471 case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
472 /* Wait Named Pipe Handle state */
473 api_WNPHS(conn, req, fsp, params, tpscnt);
474 break;
475 case TRANSACT_SETNAMEDPIPEHANDLESTATE:
476 /* Set Named Pipe Handle state */
477 api_SNPHS(conn, req, fsp, params, tpscnt);
478 break;
479 default:
480 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
481 return;
482 }
483 }
484
485 /****************************************************************************
486 Handle named pipe commands.
487 ****************************************************************************/
488
489 static void named_pipe(connection_struct *conn, uint16 vuid,
490 struct smb_request *req,
491 const char *name, uint16 *setup,
492 char *data, char *params,
493 int suwcnt, int tdscnt,int tpscnt,
494 int msrcnt, int mdrcnt, int mprcnt)
495 {
496 DEBUG(3,("named pipe command on <%s> name\n", name));
497
498 if (strequal(name,"LANMAN")) {
499 api_reply(conn, vuid, req,
500 data, params,
501 tdscnt, tpscnt,
502 mdrcnt, mprcnt);
503 return;
504 }
505
506 if (strequal(name,"WKSSVC") ||
507 strequal(name,"SRVSVC") ||
508 strequal(name,"WINREG") ||
509 strequal(name,"SAMR") ||
510 strequal(name,"LSARPC")) {
511
512 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
513
514 api_fd_reply(conn, vuid, req,
515 setup, (uint8_t *)data, params,
516 suwcnt, tdscnt, tpscnt,
517 mdrcnt, mprcnt);
518 return;
519 }
520
521 if (strlen(name) < 1) {
522 api_fd_reply(conn, vuid, req,
523 setup, (uint8_t *)data,
524 params, suwcnt, tdscnt,
525 tpscnt, mdrcnt, mprcnt);
526 return;
527 }
528
529 if (setup)
530 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
531 (int)setup[0],(int)setup[1]));
532
533 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
534 return;
535 }
536
537 static void handle_trans(connection_struct *conn, struct smb_request *req,
538 struct trans_state *state)
539 {
540 char *local_machine_name;
541 int name_offset = 0;
542
543 DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
544 state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
545 (unsigned int)state->setup_count));
546
547 /*
548 * WinCE wierdness....
549 */
550
551 local_machine_name = talloc_asprintf(state, "\\%s\\",
552 get_local_machine_name());
553
554 if (local_machine_name == NULL) {
555 reply_nterror(req, NT_STATUS_NO_MEMORY);
556 return;
557 }
558
559 if (strnequal(state->name, local_machine_name,
560 strlen(local_machine_name))) {
561 name_offset = strlen(local_machine_name)-1;
562 }
563
564 if (!strnequal(&state->name[name_offset], "\\PIPE",
565 strlen("\\PIPE"))) {
566 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
567 return;
568 }
569
570 name_offset += strlen("\\PIPE");
571
572 /* Win9x weirdness. When talking to a unicode server Win9x
573 only sends \PIPE instead of \PIPE\ */
574
575 if (state->name[name_offset] == '\\')
576 name_offset++;
577
578 DEBUG(5,("calling named_pipe\n"));
579 named_pipe(conn, state->vuid, req,
580 state->name+name_offset,
581 state->setup,state->data,
582 state->param,
583 state->setup_count,state->total_data,
584 state->total_param,
585 state->max_setup_return,
586 state->max_data_return,
587 state->max_param_return);
588
589 if (state->close_on_completion) {
590 close_cnum(conn,state->vuid);
591 req->conn = NULL;
592 }
593
594 return;
595 }
596
597 /****************************************************************************
598 Reply to a SMBtrans.
599 ****************************************************************************/
600
601 void reply_trans(struct smb_request *req)
602 {
603 connection_struct *conn = req->conn;
604 unsigned int dsoff;
605 unsigned int dscnt;
606 unsigned int psoff;
607 unsigned int pscnt;
608 struct trans_state *state;
609 NTSTATUS result;
610
611 START_PROFILE(SMBtrans);
612
613 if (req->wct < 14) {
614 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
615 END_PROFILE(SMBtrans);
616 return;
617 }
618
619 dsoff = SVAL(req->vwv+12, 0);
620 dscnt = SVAL(req->vwv+11, 0);
621 psoff = SVAL(req->vwv+10, 0);
622 pscnt = SVAL(req->vwv+9, 0);
623
624 result = allow_new_trans(conn->pending_trans, req->mid);
625 if (!NT_STATUS_IS_OK(result)) {
626 DEBUG(2, ("Got invalid trans request: %s\n",
627 nt_errstr(result)));
628 reply_nterror(req, result);
629 END_PROFILE(SMBtrans);
630 return;
631 }
632
633 if ((state = TALLOC_P(conn, struct trans_state)) == NULL) {
634 DEBUG(0, ("talloc failed\n"));
635 reply_nterror(req, NT_STATUS_NO_MEMORY);
636 END_PROFILE(SMBtrans);
637 return;
638 }
639
640 state->cmd = SMBtrans;
641
642 state->mid = req->mid;
643 state->vuid = req->vuid;
644 state->setup_count = CVAL(req->vwv+13, 0);
645 state->setup = NULL;
646 state->total_param = SVAL(req->vwv+0, 0);
647 state->param = NULL;
648 state->total_data = SVAL(req->vwv+1, 0);
649 state->data = NULL;
650 state->max_param_return = SVAL(req->vwv+2, 0);
651 state->max_data_return = SVAL(req->vwv+3, 0);
652 state->max_setup_return = CVAL(req->vwv+4, 0);
653 state->close_on_completion = BITSETW(req->vwv+5, 0);
654 state->one_way = BITSETW(req->vwv+5, 1);
655
656 srvstr_pull_req_talloc(state, req, &state->name, req->buf,
657 STR_TERMINATE);
658
659 if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
660 !state->name)
661 goto bad_param;
662
663 if (state->total_data) {
664
665 if (trans_oob(state->total_data, 0, dscnt)
666 || trans_oob(smb_len(req->inbuf), dsoff, dscnt)) {
667 goto bad_param;
668 }
669
670 /* Can't use talloc here, the core routines do realloc on the
671 * params and data. Out of paranoia, 100 bytes too many. */
672 state->data = (char *)SMB_MALLOC(state->total_data+100);
673 if (state->data == NULL) {
674 DEBUG(0,("reply_trans: data malloc fail for %u "
675 "bytes !\n", (unsigned int)state->total_data));
676 TALLOC_FREE(state);
677 reply_nterror(req, NT_STATUS_NO_MEMORY);
678 END_PROFILE(SMBtrans);
679 return;
680 }
681 /* null-terminate the slack space */
682 memset(&state->data[state->total_data], 0, 100);
683
684 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
685 }
686
687 if (state->total_param) {
688
689 if (trans_oob(state->total_param, 0, pscnt)
690 || trans_oob(smb_len(req->inbuf), psoff, pscnt)) {
691 goto bad_param;
692 }
693
694 /* Can't use talloc here, the core routines do realloc on the
695 * params and data. Out of paranoia, 100 bytes too many */
696 state->param = (char *)SMB_MALLOC(state->total_param+100);
697 if (state->param == NULL) {
698 DEBUG(0,("reply_trans: param malloc fail for %u "
699 "bytes !\n", (unsigned int)state->total_param));
700 SAFE_FREE(state->data);
701 TALLOC_FREE(state);
702 reply_nterror(req, NT_STATUS_NO_MEMORY);
703 END_PROFILE(SMBtrans);
704 return;
705 }
706 /* null-terminate the slack space */
707 memset(&state->param[state->total_param], 0, 100);
708
709 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
710 }
711
712 state->received_data = dscnt;
713 state->received_param = pscnt;
714
715 if (state->setup_count) {
716 unsigned int i;
717
718 /*
719 * No overflow possible here, state->setup_count is an
720 * unsigned int, being filled by a single byte from
721 * CVAL(req->vwv+13, 0) above. The cast in the comparison
722 * below is not necessary, it's here to clarify things. The
723 * validity of req->vwv and req->wct has been checked in
724 * init_smb_request already.
725 */
726 if (state->setup_count + 14 > (unsigned int)req->wct) {
727 goto bad_param;
728 }
729
730 if((state->setup = TALLOC_ARRAY(
731 state, uint16, state->setup_count)) == NULL) {
732 DEBUG(0,("reply_trans: setup malloc fail for %u "
733 "bytes !\n", (unsigned int)
734 (state->setup_count * sizeof(uint16))));
735 SAFE_FREE(state->data);
736 SAFE_FREE(state->param);
737 TALLOC_FREE(state);
738 reply_nterror(req, NT_STATUS_NO_MEMORY);
739 END_PROFILE(SMBtrans);
740 return;
741 }
742
743 for (i=0;i<state->setup_count;i++) {
744 state->setup[i] = SVAL(req->vwv + 14 + i, 0);
745 }
746 }
747
748 state->received_param = pscnt;
749
750 if ((state->received_param != state->total_param) ||
751 (state->received_data != state->total_data)) {
752 DLIST_ADD(conn->pending_trans, state);
753
754 /* We need to send an interim response then receive the rest
755 of the parameter/data bytes */
756 reply_outbuf(req, 0, 0);
757 show_msg((char *)req->outbuf);
758 END_PROFILE(SMBtrans);
759 return;
760 }
761
762 talloc_steal(talloc_tos(), state);
763
764 handle_trans(conn, req, state);
765
766 SAFE_FREE(state->data);
767 SAFE_FREE(state->param);
768 TALLOC_FREE(state);
769
770 END_PROFILE(SMBtrans);
771 return;
772
773 bad_param:
774
775 DEBUG(0,("reply_trans: invalid trans parameters\n"));
776 SAFE_FREE(state->data);
777 SAFE_FREE(state->param);
778 TALLOC_FREE(state);
779 END_PROFILE(SMBtrans);
780 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
781 return;
782 }
783
784 /****************************************************************************
785 Reply to a secondary SMBtrans.
786 ****************************************************************************/
787
788 void reply_transs(struct smb_request *req)
789 {
790 connection_struct *conn = req->conn;
791 unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
792 struct trans_state *state;
793
794 START_PROFILE(SMBtranss);
795
796 show_msg((char *)req->inbuf);
797
798 if (req->wct < 8) {
799 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
800 END_PROFILE(SMBtranss);
801 return;
802 }
803
804 for (state = conn->pending_trans; state != NULL;
805 state = state->next) {
806 if (state->mid == req->mid) {
807 break;
808 }
809 }
810
811 if ((state == NULL) || (state->cmd != SMBtrans)) {
812 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
813 END_PROFILE(SMBtranss);
814 return;
815 }
816
817 /* Revise total_params and total_data in case they have changed
818 * downwards */
819
820 if (SVAL(req->vwv+0, 0) < state->total_param)
821 state->total_param = SVAL(req->vwv+0, 0);
822 if (SVAL(req->vwv+1, 0) < state->total_data)
823 state->total_data = SVAL(req->vwv+1, 0);
824
825 pcnt = SVAL(req->vwv+2, 0);
826 poff = SVAL(req->vwv+3, 0);
827 pdisp = SVAL(req->vwv+4, 0);
828
829 dcnt = SVAL(req->vwv+5, 0);
830 doff = SVAL(req->vwv+6, 0);
831 ddisp = SVAL(req->vwv+7, 0);
832
833 state->received_param += pcnt;
834 state->received_data += dcnt;
835
836 if ((state->received_data > state->total_data) ||
837 (state->received_param > state->total_param))
838 goto bad_param;
839
840 if (pcnt) {
841 if (trans_oob(state->total_param, pdisp, pcnt)
842 || trans_oob(smb_len(req->inbuf), poff, pcnt)) {
843 goto bad_param;
844 }
845 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,pcnt);
846 }
847
848 if (dcnt) {
849 if (trans_oob(state->total_data, ddisp, dcnt)
850 || trans_oob(smb_len(req->inbuf), doff, dcnt)) {
851 goto bad_param;
852 }
853 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,dcnt);
854 }
855
856 if ((state->received_param < state->total_param) ||
857 (state->received_data < state->total_data)) {
858 END_PROFILE(SMBtranss);
859 return;
860 }
861
862 talloc_steal(talloc_tos(), state);
863
864 handle_trans(conn, req, state);
865
866 DLIST_REMOVE(conn->pending_trans, state);
867 SAFE_FREE(state->data);
868 SAFE_FREE(state->param);
869 TALLOC_FREE(state);
870
871 END_PROFILE(SMBtranss);
872 return;
873
874 bad_param:
875
876 DEBUG(0,("reply_transs: invalid trans parameters\n"));
877 DLIST_REMOVE(conn->pending_trans, state);
878 SAFE_FREE(state->data);
879 SAFE_FREE(state->param);
880 TALLOC_FREE(state);
881 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
882 END_PROFILE(SMBtranss);
883 return;
884 }
kamenim's samba4 branches