Remove some smb fsp knowledge from rpc_server/
[samba.git] / source3 / smbd / ipc.c
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))) {
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_vwv3,this_lparam);
174                 SSVAL(req->outbuf,smb_vwv4,
175                       smb_offset(smb_buf(req->outbuf)+1,req->outbuf));
176                 SSVAL(req->outbuf,smb_vwv5,tot_param_sent);
177                 SSVAL(req->outbuf,smb_vwv6,this_ldata);
178                 SSVAL(req->outbuf,smb_vwv7,
179                       smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
180                                  req->outbuf));
181                 SSVAL(req->outbuf,smb_vwv8,tot_data_sent);
182                 SSVAL(req->outbuf,smb_vwv9,0);
183
184                 if (buffer_too_large) {
185                         error_packet_set((char *)req->outbuf,
186                                          ERRDOS, ERRmoredata,
187                                          STATUS_BUFFER_OVERFLOW,
188                                          __LINE__, __FILE__);
189                 }
190
191                 show_msg((char *)req->outbuf);
192                 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
193                                   IS_CONN_ENCRYPTED(conn)))
194                         exit_server_cleanly("send_trans_reply: srv_send_smb "
195                                             "failed.");
196
197                 tot_data_sent  += this_ldata;
198                 tot_param_sent += this_lparam;
199                 TALLOC_FREE(req->outbuf);
200         }
201 }
202
203 /****************************************************************************
204  Start the first part of an RPC reply which began with an SMBtrans request.
205 ****************************************************************************/
206
207 static void api_rpc_trans_reply(connection_struct *conn,
208                                 struct smb_request *req,
209                                 files_struct *fsp,
210                                 int max_trans_reply)
211 {
212         bool is_data_outstanding;
213         uint8_t *rdata = SMB_MALLOC_ARRAY(uint8_t, max_trans_reply);
214         ssize_t data_len;
215         NTSTATUS status;
216
217         if(rdata == NULL) {
218                 DEBUG(0,("api_rpc_trans_reply: malloc fail.\n"));
219                 reply_nterror(req, NT_STATUS_NO_MEMORY);
220                 return;
221         }
222
223         if (!fsp_is_np(fsp)) {
224                 SAFE_FREE(rdata);
225                 api_no_reply(conn,req);
226                 return;
227         }
228
229         status = np_read(fsp->fake_file_handle, rdata, max_trans_reply,
230                          &data_len, &is_data_outstanding);
231         if (!NT_STATUS_IS_OK(status)) {
232                 SAFE_FREE(rdata);
233                 api_no_reply(conn,req);
234                 return;
235         }
236
237         send_trans_reply(conn, req, NULL, 0, (char *)rdata, data_len,
238                          is_data_outstanding);
239         SAFE_FREE(rdata);
240         return;
241 }
242
243 /****************************************************************************
244  WaitNamedPipeHandleState 
245 ****************************************************************************/
246
247 static void api_WNPHS(connection_struct *conn, struct smb_request *req,
248                       struct files_struct *fsp, char *param, int param_len)
249 {
250         if (!param || param_len < 2) {
251                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
252                 return;
253         }
254
255         DEBUG(4,("WaitNamedPipeHandleState priority %x\n",
256                  (int)SVAL(param,0)));
257
258         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
259 }
260
261
262 /****************************************************************************
263  SetNamedPipeHandleState 
264 ****************************************************************************/
265
266 static void api_SNPHS(connection_struct *conn, struct smb_request *req,
267                       struct files_struct *fsp, char *param, int param_len)
268 {
269         if (!param || param_len < 2) {
270                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
271                 return;
272         }
273
274         DEBUG(4,("SetNamedPipeHandleState to code %x\n", (int)SVAL(param,0)));
275
276         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
277 }
278
279
280 /****************************************************************************
281  When no reply is generated, indicate unsupported.
282  ****************************************************************************/
283
284 static void api_no_reply(connection_struct *conn, struct smb_request *req)
285 {
286         char rparam[4];
287
288         /* unsupported */
289         SSVAL(rparam,0,NERR_notsupported);
290         SSVAL(rparam,2,0); /* converter word */
291
292         DEBUG(3,("Unsupported API fd command\n"));
293
294         /* now send the reply */
295         send_trans_reply(conn, req, rparam, 4, NULL, 0, False);
296
297         return;
298 }
299
300 /****************************************************************************
301  Handle remote api calls delivered to a named pipe already opened.
302  ****************************************************************************/
303
304 static void api_fd_reply(connection_struct *conn, uint16 vuid,
305                          struct smb_request *req,
306                          uint16 *setup, uint8_t *data, char *params,
307                          int suwcnt, int tdscnt, int tpscnt,
308                          int mdrcnt, int mprcnt)
309 {
310         struct files_struct *fsp;
311         int pnum;
312         int subcommand;
313         NTSTATUS status;
314
315         DEBUG(5,("api_fd_reply\n"));
316
317         /* First find out the name of this file. */
318         if (suwcnt != 2) {
319                 DEBUG(0,("Unexpected named pipe transaction.\n"));
320                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
321                 return;
322         }
323
324         /* Get the file handle and hence the file name. */
325         /* 
326          * NB. The setup array has already been transformed
327          * via SVAL and so is in host byte order.
328          */
329         pnum = ((int)setup[1]) & 0xFFFF;
330         subcommand = ((int)setup[0]) & 0xFFFF;
331
332         fsp = file_fsp(req, pnum);
333
334         if (!fsp_is_np(fsp)) {
335                 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
336                         /* Win9x does this call with a unicode pipe name, not a pnum. */
337                         /* Just return success for now... */
338                         DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
339                         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
340                         return;
341                 }
342
343                 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
344                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
345                 return;
346         }
347
348         if (vuid != fsp->vuid) {
349                 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
350                           "expected %d\n", pnum, vuid, fsp->vuid));
351                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
352                 return;
353         }
354
355         DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n",
356                  subcommand, fsp->fsp_name, pnum));
357
358         DEBUG(10, ("api_fd_reply: p:%p max_trans_reply: %d\n", fsp, mdrcnt));
359
360         switch (subcommand) {
361         case TRANSACT_DCERPCCMD: {
362                 /* dce/rpc command */
363                 ssize_t nwritten;
364                 status = np_write(fsp->fake_file_handle, data, tdscnt,
365                                   &nwritten);
366                 if (!NT_STATUS_IS_OK(status)) {
367                         api_no_reply(conn, req);
368                         return;
369                 }
370                 api_rpc_trans_reply(conn, req, fsp, mdrcnt);
371                 break;
372         }
373         case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
374                 /* Wait Named Pipe Handle state */
375                 api_WNPHS(conn, req, fsp, params, tpscnt);
376                 break;
377         case TRANSACT_SETNAMEDPIPEHANDLESTATE:
378                 /* Set Named Pipe Handle state */
379                 api_SNPHS(conn, req, fsp, params, tpscnt);
380                 break;
381         default:
382                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
383                 return;
384         }
385 }
386
387 /****************************************************************************
388  Handle named pipe commands.
389 ****************************************************************************/
390
391 static void named_pipe(connection_struct *conn, uint16 vuid,
392                        struct smb_request *req,
393                        const char *name, uint16 *setup,
394                        char *data, char *params,
395                        int suwcnt, int tdscnt,int tpscnt,
396                        int msrcnt, int mdrcnt, int mprcnt)
397 {
398         DEBUG(3,("named pipe command on <%s> name\n", name));
399
400         if (strequal(name,"LANMAN")) {
401                 api_reply(conn, vuid, req,
402                           data, params,
403                           tdscnt, tpscnt,
404                           mdrcnt, mprcnt);
405                 return;
406         }
407
408         if (strequal(name,"WKSSVC") ||
409             strequal(name,"SRVSVC") ||
410             strequal(name,"WINREG") ||
411             strequal(name,"SAMR") ||
412             strequal(name,"LSARPC")) {
413
414                 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
415
416                 api_fd_reply(conn, vuid, req,
417                              setup, (uint8_t *)data, params,
418                              suwcnt, tdscnt, tpscnt,
419                              mdrcnt, mprcnt);
420                 return;
421         }
422
423         if (strlen(name) < 1) {
424                 api_fd_reply(conn, vuid, req,
425                              setup, (uint8_t *)data,
426                              params, suwcnt, tdscnt,
427                              tpscnt, mdrcnt, mprcnt);
428                 return;
429         }
430
431         if (setup)
432                 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
433                          (int)setup[0],(int)setup[1]));
434
435         reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
436         return;
437 }
438
439 static void handle_trans(connection_struct *conn, struct smb_request *req,
440                          struct trans_state *state)
441 {
442         char *local_machine_name;
443         int name_offset = 0;
444
445         DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
446                  state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
447                  (unsigned int)state->setup_count));
448
449         /*
450          * WinCE wierdness....
451          */
452
453         local_machine_name = talloc_asprintf(state, "\\%s\\",
454                                              get_local_machine_name());
455
456         if (local_machine_name == NULL) {
457                 reply_nterror(req, NT_STATUS_NO_MEMORY);
458                 return;
459         }
460
461         if (strnequal(state->name, local_machine_name,
462                       strlen(local_machine_name))) {
463                 name_offset = strlen(local_machine_name)-1;
464         }
465
466         if (!strnequal(&state->name[name_offset], "\\PIPE",
467                        strlen("\\PIPE"))) {
468                 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
469                 return;
470         }
471
472         name_offset += strlen("\\PIPE");
473
474         /* Win9x weirdness.  When talking to a unicode server Win9x
475            only sends \PIPE instead of \PIPE\ */
476
477         if (state->name[name_offset] == '\\')
478                 name_offset++;
479
480         DEBUG(5,("calling named_pipe\n"));
481         named_pipe(conn, state->vuid, req,
482                    state->name+name_offset,
483                    state->setup,state->data,
484                    state->param,
485                    state->setup_count,state->total_data,
486                    state->total_param,
487                    state->max_setup_return,
488                    state->max_data_return,
489                    state->max_param_return);
490
491         if (state->close_on_completion) {
492                 close_cnum(conn,state->vuid);
493                 req->conn = NULL;
494         }
495
496         return;
497 }
498
499 /****************************************************************************
500  Reply to a SMBtrans.
501  ****************************************************************************/
502
503 void reply_trans(struct smb_request *req)
504 {
505         connection_struct *conn = req->conn;
506         unsigned int dsoff;
507         unsigned int dscnt;
508         unsigned int psoff;
509         unsigned int pscnt;
510         struct trans_state *state;
511         NTSTATUS result;
512
513         START_PROFILE(SMBtrans);
514
515         if (req->wct < 14) {
516                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
517                 END_PROFILE(SMBtrans);
518                 return;
519         }
520
521         dsoff = SVAL(req->vwv+12, 0);
522         dscnt = SVAL(req->vwv+11, 0);
523         psoff = SVAL(req->vwv+10, 0);
524         pscnt = SVAL(req->vwv+9, 0);
525
526         result = allow_new_trans(conn->pending_trans, req->mid);
527         if (!NT_STATUS_IS_OK(result)) {
528                 DEBUG(2, ("Got invalid trans request: %s\n",
529                           nt_errstr(result)));
530                 reply_nterror(req, result);
531                 END_PROFILE(SMBtrans);
532                 return;
533         }
534
535         if ((state = TALLOC_P(conn, struct trans_state)) == NULL) {
536                 DEBUG(0, ("talloc failed\n"));
537                 reply_nterror(req, NT_STATUS_NO_MEMORY);
538                 END_PROFILE(SMBtrans);
539                 return;
540         }
541
542         state->cmd = SMBtrans;
543
544         state->mid = req->mid;
545         state->vuid = req->vuid;
546         state->setup_count = CVAL(req->vwv+13, 0);
547         state->setup = NULL;
548         state->total_param = SVAL(req->vwv+0, 0);
549         state->param = NULL;
550         state->total_data = SVAL(req->vwv+1, 0);
551         state->data = NULL;
552         state->max_param_return = SVAL(req->vwv+2, 0);
553         state->max_data_return = SVAL(req->vwv+3, 0);
554         state->max_setup_return = CVAL(req->vwv+4, 0);
555         state->close_on_completion = BITSETW(req->vwv+5, 0);
556         state->one_way = BITSETW(req->vwv+5, 1);
557
558         srvstr_pull_req_talloc(state, req, &state->name, req->buf,
559                                STR_TERMINATE);
560
561         if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
562                         !state->name)
563                 goto bad_param;
564
565         if (state->total_data)  {
566
567                 if (trans_oob(state->total_data, 0, dscnt)
568                     || trans_oob(smb_len(req->inbuf), dsoff, dscnt)) {
569                         goto bad_param;
570                 }
571
572                 /* Can't use talloc here, the core routines do realloc on the
573                  * params and data. Out of paranoia, 100 bytes too many. */
574                 state->data = (char *)SMB_MALLOC(state->total_data+100);
575                 if (state->data == NULL) {
576                         DEBUG(0,("reply_trans: data malloc fail for %u "
577                                  "bytes !\n", (unsigned int)state->total_data));
578                         TALLOC_FREE(state);
579                         reply_nterror(req, NT_STATUS_NO_MEMORY);
580                         END_PROFILE(SMBtrans);
581                         return;
582                 }
583                 /* null-terminate the slack space */
584                 memset(&state->data[state->total_data], 0, 100);
585
586                 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
587         }
588
589         if (state->total_param) {
590
591                 if (trans_oob(state->total_param, 0, pscnt)
592                     || trans_oob(smb_len(req->inbuf), psoff, pscnt)) {
593                         goto bad_param;
594                 }
595
596                 /* Can't use talloc here, the core routines do realloc on the
597                  * params and data. Out of paranoia, 100 bytes too many */
598                 state->param = (char *)SMB_MALLOC(state->total_param+100);
599                 if (state->param == NULL) {
600                         DEBUG(0,("reply_trans: param malloc fail for %u "
601                                  "bytes !\n", (unsigned int)state->total_param));
602                         SAFE_FREE(state->data);
603                         TALLOC_FREE(state);
604                         reply_nterror(req, NT_STATUS_NO_MEMORY);
605                         END_PROFILE(SMBtrans);
606                         return;
607                 } 
608                 /* null-terminate the slack space */
609                 memset(&state->param[state->total_param], 0, 100);
610
611                 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
612         }
613
614         state->received_data  = dscnt;
615         state->received_param = pscnt;
616
617         if (state->setup_count) {
618                 unsigned int i;
619
620                 /*
621                  * No overflow possible here, state->setup_count is an
622                  * unsigned int, being filled by a single byte from
623                  * CVAL(req->vwv+13, 0) above. The cast in the comparison
624                  * below is not necessary, it's here to clarify things. The
625                  * validity of req->vwv and req->wct has been checked in
626                  * init_smb_request already.
627                  */
628                 if (state->setup_count + 14 > (unsigned int)req->wct) {
629                         goto bad_param;
630                 }
631
632                 if((state->setup = TALLOC_ARRAY(
633                             state, uint16, state->setup_count)) == NULL) {
634                         DEBUG(0,("reply_trans: setup malloc fail for %u "
635                                  "bytes !\n", (unsigned int)
636                                  (state->setup_count * sizeof(uint16))));
637                         SAFE_FREE(state->data);
638                         SAFE_FREE(state->param);
639                         TALLOC_FREE(state);
640                         reply_nterror(req, NT_STATUS_NO_MEMORY);
641                         END_PROFILE(SMBtrans);
642                         return;
643                 } 
644
645                 for (i=0;i<state->setup_count;i++) {
646                         state->setup[i] = SVAL(req->vwv + 14 + i, 0);
647                 }
648         }
649
650         state->received_param = pscnt;
651
652         if ((state->received_param != state->total_param) ||
653             (state->received_data != state->total_data)) {
654                 DLIST_ADD(conn->pending_trans, state);
655
656                 /* We need to send an interim response then receive the rest
657                    of the parameter/data bytes */
658                 reply_outbuf(req, 0, 0);
659                 show_msg((char *)req->outbuf);
660                 END_PROFILE(SMBtrans);
661                 return;
662         }
663
664         handle_trans(conn, req, state);
665
666         SAFE_FREE(state->data);
667         SAFE_FREE(state->param);
668         TALLOC_FREE(state);
669
670         END_PROFILE(SMBtrans);
671         return;
672
673   bad_param:
674
675         DEBUG(0,("reply_trans: invalid trans parameters\n"));
676         SAFE_FREE(state->data);
677         SAFE_FREE(state->param);
678         TALLOC_FREE(state);
679         END_PROFILE(SMBtrans);
680         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
681         return;
682 }
683
684 /****************************************************************************
685  Reply to a secondary SMBtrans.
686  ****************************************************************************/
687
688 void reply_transs(struct smb_request *req)
689 {
690         connection_struct *conn = req->conn;
691         unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
692         struct trans_state *state;
693
694         START_PROFILE(SMBtranss);
695
696         show_msg((char *)req->inbuf);
697
698         if (req->wct < 8) {
699                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
700                 END_PROFILE(SMBtranss);
701                 return;
702         }
703
704         for (state = conn->pending_trans; state != NULL;
705              state = state->next) {
706                 if (state->mid == req->mid) {
707                         break;
708                 }
709         }
710
711         if ((state == NULL) || (state->cmd != SMBtrans)) {
712                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
713                 END_PROFILE(SMBtranss);
714                 return;
715         }
716
717         /* Revise total_params and total_data in case they have changed
718          * downwards */
719
720         if (SVAL(req->vwv+0, 0) < state->total_param)
721                 state->total_param = SVAL(req->vwv+0, 0);
722         if (SVAL(req->vwv+1, 0) < state->total_data)
723                 state->total_data = SVAL(req->vwv+1, 0);
724
725         pcnt = SVAL(req->vwv+2, 0);
726         poff = SVAL(req->vwv+3, 0);
727         pdisp = SVAL(req->vwv+4, 0);
728
729         dcnt = SVAL(req->vwv+5, 0);
730         doff = SVAL(req->vwv+6, 0);
731         ddisp = SVAL(req->vwv+7, 0);
732
733         state->received_param += pcnt;
734         state->received_data += dcnt;
735
736         if ((state->received_data > state->total_data) ||
737             (state->received_param > state->total_param))
738                 goto bad_param;
739
740         if (pcnt) {
741                 if (trans_oob(state->total_param, pdisp, pcnt)
742                     || trans_oob(smb_len(req->inbuf), poff, pcnt)) {
743                         goto bad_param;
744                 }
745                 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,pcnt);
746         }
747
748         if (dcnt) {
749                 if (trans_oob(state->total_data, ddisp, dcnt)
750                     || trans_oob(smb_len(req->inbuf), doff, dcnt)) {
751                         goto bad_param;
752                 }
753                 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,dcnt);
754         }
755
756         if ((state->received_param < state->total_param) ||
757             (state->received_data < state->total_data)) {
758                 END_PROFILE(SMBtranss);
759                 return;
760         }
761
762         handle_trans(conn, req, state);
763
764         DLIST_REMOVE(conn->pending_trans, state);
765         SAFE_FREE(state->data);
766         SAFE_FREE(state->param);
767         TALLOC_FREE(state);
768
769         END_PROFILE(SMBtranss);
770         return;
771
772   bad_param:
773
774         DEBUG(0,("reply_transs: invalid trans parameters\n"));
775         DLIST_REMOVE(conn->pending_trans, state);
776         SAFE_FREE(state->data);
777         SAFE_FREE(state->param);
778         TALLOC_FREE(state);
779         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
780         END_PROFILE(SMBtranss);
781         return;
782 }