6b647fc72b665d383bc8cd3e1a335d1506716fa2
[tprouty/samba.git] / source / 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 2 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, write to the Free Software
21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22    */
23 /*
24    This file handles the named pipe and mailslot calls
25    in the SMBtrans protocol
26    */
27
28 #include "includes.h"
29
30 extern int max_send;
31
32 #define NERR_notsupported 50
33
34 extern int smb_read_error;
35
36 /*******************************************************************
37  copies parameters and data, as needed, into the smb buffer
38
39  *both* the data and params sections should be aligned.  this
40  is fudged in the rpc pipes by 
41  at present, only the data section is.  this may be a possible
42  cause of some of the ipc problems being experienced.  lkcl26dec97
43
44  ******************************************************************/
45
46 static void copy_trans_params_and_data(char *outbuf, int align,
47                                 char *rparam, int param_offset, int param_len,
48                                 char *rdata, int data_offset, int data_len)
49 {
50         char *copy_into = smb_buf(outbuf)+1;
51
52         if(param_len < 0)
53                 param_len = 0;
54
55         if(data_len < 0)
56                 data_len = 0;
57
58         DEBUG(5,("copy_trans_params_and_data: params[%d..%d] data[%d..%d]\n",
59                         param_offset, param_offset + param_len,
60                         data_offset , data_offset  + data_len));
61
62         if (param_len)
63                 memcpy(copy_into, &rparam[param_offset], param_len);
64
65         copy_into += param_len + align;
66
67         if (data_len )
68                 memcpy(copy_into, &rdata[data_offset], data_len);
69 }
70
71 /****************************************************************************
72  Send a trans reply.
73  ****************************************************************************/
74
75 void send_trans_reply(const char *inbuf,
76                         char *outbuf,
77                         char *rparam,
78                         int rparam_len,
79                         char *rdata,
80                         int rdata_len,
81                         BOOL buffer_too_large)
82 {
83         int this_ldata,this_lparam;
84         int tot_data_sent = 0;
85         int tot_param_sent = 0;
86         int align;
87
88         int ldata  = rdata  ? rdata_len : 0;
89         int lparam = rparam ? rparam_len : 0;
90
91         if (buffer_too_large)
92                 DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
93
94         this_lparam = MIN(lparam,max_send - 500); /* hack */
95         this_ldata  = MIN(ldata,max_send - (500+this_lparam));
96
97         align = ((this_lparam)%4);
98
99         if (buffer_too_large) {
100                 ERROR_BOTH(STATUS_BUFFER_OVERFLOW,ERRDOS,ERRmoredata);
101         }
102
103         set_message(inbuf,outbuf,10,1+align+this_ldata+this_lparam,True);
104
105         copy_trans_params_and_data(outbuf, align,
106                                 rparam, tot_param_sent, this_lparam,
107                                 rdata, tot_data_sent, this_ldata);
108
109         SSVAL(outbuf,smb_vwv0,lparam);
110         SSVAL(outbuf,smb_vwv1,ldata);
111         SSVAL(outbuf,smb_vwv3,this_lparam);
112         SSVAL(outbuf,smb_vwv4,smb_offset(smb_buf(outbuf)+1,outbuf));
113         SSVAL(outbuf,smb_vwv5,0);
114         SSVAL(outbuf,smb_vwv6,this_ldata);
115         SSVAL(outbuf,smb_vwv7,smb_offset(smb_buf(outbuf)+1+this_lparam+align,outbuf));
116         SSVAL(outbuf,smb_vwv8,0);
117         SSVAL(outbuf,smb_vwv9,0);
118
119         show_msg(outbuf);
120         if (!send_smb(smbd_server_fd(),outbuf))
121                 exit_server_cleanly("send_trans_reply: send_smb failed.");
122
123         tot_data_sent = this_ldata;
124         tot_param_sent = this_lparam;
125
126         while (tot_data_sent < ldata || tot_param_sent < lparam)
127         {
128                 this_lparam = MIN(lparam-tot_param_sent, max_send - 500); /* hack */
129                 this_ldata  = MIN(ldata -tot_data_sent, max_send - (500+this_lparam));
130
131                 if(this_lparam < 0)
132                         this_lparam = 0;
133
134                 if(this_ldata < 0)
135                         this_ldata = 0;
136
137                 align = (this_lparam%4);
138
139                 set_message(inbuf,outbuf,10,1+this_ldata+this_lparam+align,False);
140
141                 copy_trans_params_and_data(outbuf, align,
142                                            rparam, tot_param_sent, this_lparam,
143                                            rdata, tot_data_sent, this_ldata);
144                 
145                 SSVAL(outbuf,smb_vwv3,this_lparam);
146                 SSVAL(outbuf,smb_vwv4,smb_offset(smb_buf(outbuf)+1,outbuf));
147                 SSVAL(outbuf,smb_vwv5,tot_param_sent);
148                 SSVAL(outbuf,smb_vwv6,this_ldata);
149                 SSVAL(outbuf,smb_vwv7,smb_offset(smb_buf(outbuf)+1+this_lparam+align,outbuf));
150                 SSVAL(outbuf,smb_vwv8,tot_data_sent);
151                 SSVAL(outbuf,smb_vwv9,0);
152
153                 show_msg(outbuf);
154                 if (!send_smb(smbd_server_fd(),outbuf))
155                         exit_server_cleanly("send_trans_reply: send_smb failed.");
156
157                 tot_data_sent  += this_ldata;
158                 tot_param_sent += this_lparam;
159         }
160 }
161
162 /****************************************************************************
163  Start the first part of an RPC reply which began with an SMBtrans request.
164 ****************************************************************************/
165
166 static BOOL api_rpc_trans_reply(const char *inbuf,
167                                 char *outbuf,
168                                 smb_np_struct *p)
169 {
170         BOOL is_data_outstanding;
171         char *rdata = (char *)SMB_MALLOC(p->max_trans_reply);
172         int data_len;
173
174         if(rdata == NULL) {
175                 DEBUG(0,("api_rpc_trans_reply: malloc fail.\n"));
176                 return False;
177         }
178
179         if((data_len = read_from_pipe( p, rdata, p->max_trans_reply,
180                                         &is_data_outstanding)) < 0) {
181                 SAFE_FREE(rdata);
182                 return False;
183         }
184
185         send_trans_reply(inbuf, outbuf, NULL, 0, rdata, data_len, is_data_outstanding);
186
187         SAFE_FREE(rdata);
188         return True;
189 }
190
191 /****************************************************************************
192  WaitNamedPipeHandleState 
193 ****************************************************************************/
194
195 static BOOL api_WNPHS(const char *inbuf,
196                         char *outbuf,
197                         smb_np_struct *p,
198                         char *param,
199                         int param_len)
200 {
201         uint16 priority;
202
203         if (!param || param_len < 2)
204                 return False;
205
206         priority = SVAL(param,0);
207         DEBUG(4,("WaitNamedPipeHandleState priority %x\n", priority));
208
209         if (wait_rpc_pipe_hnd_state(p, priority)) {
210                 /* now send the reply */
211                 send_trans_reply(inbuf, outbuf, NULL, 0, NULL, 0, False);
212                 return True;
213         }
214         return False;
215 }
216
217
218 /****************************************************************************
219  SetNamedPipeHandleState 
220 ****************************************************************************/
221
222 static BOOL api_SNPHS(const char *inbuf,
223                         char *outbuf,
224                         smb_np_struct *p,
225                         char *param,
226                         int param_len)
227 {
228         uint16 id;
229
230         if (!param || param_len < 2)
231                 return False;
232
233         id = SVAL(param,0);
234         DEBUG(4,("SetNamedPipeHandleState to code %x\n", id));
235
236         if (set_rpc_pipe_hnd_state(p, id)) {
237                 /* now send the reply */
238                 send_trans_reply(inbuf, outbuf, NULL, 0, NULL, 0, False);
239                 return True;
240         }
241         return False;
242 }
243
244
245 /****************************************************************************
246  When no reply is generated, indicate unsupported.
247  ****************************************************************************/
248
249 static BOOL api_no_reply(const char *inbuf, char *outbuf, int max_rdata_len)
250 {
251         char rparam[4];
252
253         /* unsupported */
254         SSVAL(rparam,0,NERR_notsupported);
255         SSVAL(rparam,2,0); /* converter word */
256
257         DEBUG(3,("Unsupported API fd command\n"));
258
259         /* now send the reply */
260         send_trans_reply(inbuf, outbuf, rparam, 4, NULL, 0, False);
261
262         return -1;
263 }
264
265 /****************************************************************************
266  Handle remote api calls delivered to a named pipe already opened.
267  ****************************************************************************/
268
269 static int api_fd_reply(connection_struct *conn,
270                         uint16 vuid,
271                         const char *inbuf,
272                         char *outbuf,
273                         uint16 *setup,
274                         char *data,
275                         char *params,
276                         int suwcnt,
277                         int tdscnt,
278                         int tpscnt,
279                         int mdrcnt,
280                         int mprcnt)
281 {
282         BOOL reply = False;
283         smb_np_struct *p = NULL;
284         int pnum;
285         int subcommand;
286
287         DEBUG(5,("api_fd_reply\n"));
288
289         /* First find out the name of this file. */
290         if (suwcnt != 2) {
291                 DEBUG(0,("Unexpected named pipe transaction.\n"));
292                 return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
293         }
294
295         /* Get the file handle and hence the file name. */
296         /* 
297          * NB. The setup array has already been transformed
298          * via SVAL and so is in gost byte order.
299          */
300         pnum = ((int)setup[1]) & 0xFFFF;
301         subcommand = ((int)setup[0]) & 0xFFFF;
302
303         if(!(p = get_rpc_pipe(pnum))) {
304                 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
305                         /* Win9x does this call with a unicode pipe name, not a pnum. */
306                         /* Just return success for now... */
307                         DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
308                         send_trans_reply(inbuf, outbuf, NULL, 0, NULL, 0, False);
309                         return -1;
310                 }
311
312                 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
313                 return ERROR_NT(NT_STATUS_INVALID_HANDLE);
314         }
315
316         if (vuid != p->vuid) {
317                 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
318                           "expected %d\n", pnum, vuid, p->vuid));
319                 return ERROR_NT(NT_STATUS_INVALID_HANDLE);
320         }
321
322         DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n", subcommand, p->name, pnum));
323
324         /* record maximum data length that can be transmitted in an SMBtrans */
325         p->max_trans_reply = mdrcnt;
326
327         DEBUG(10,("api_fd_reply: p:%p max_trans_reply: %d\n", p, p->max_trans_reply));
328
329         switch (subcommand) {
330         case TRANSACT_DCERPCCMD:
331                 /* dce/rpc command */
332                 reply = write_to_pipe(p, data, tdscnt);
333                 if (reply)
334                         reply = api_rpc_trans_reply(inbuf, outbuf, p);
335                 break;
336         case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
337                 /* Wait Named Pipe Handle state */
338                 reply = api_WNPHS(inbuf, outbuf, p, params, tpscnt);
339                 break;
340         case TRANSACT_SETNAMEDPIPEHANDLESTATE:
341                 /* Set Named Pipe Handle state */
342                 reply = api_SNPHS(inbuf, outbuf, p, params, tpscnt);
343                 break;
344         default:
345                 return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
346         }
347
348         if (!reply)
349                 return api_no_reply(inbuf, outbuf, mdrcnt);
350
351         return -1;
352 }
353
354 /****************************************************************************
355  Handle named pipe commands.
356 ****************************************************************************/
357
358 static int named_pipe(connection_struct *conn,
359                         uint16 vuid,
360                         const char *inbuf,
361                         char *outbuf,
362                         char *name,
363                         uint16 *setup,
364                         char *data,
365                         char *params,
366                         int suwcnt,
367                         int tdscnt,
368                         int tpscnt,
369                         int msrcnt,
370                         int mdrcnt,
371                         int mprcnt)
372 {
373         DEBUG(3,("named pipe command on <%s> name\n", name));
374
375         if (strequal(name,"LANMAN")) {
376                 return api_reply(conn,
377                                 vuid,
378                                 inbuf,
379                                 outbuf,
380                                 data,
381                                 params,
382                                 tdscnt,
383                                 tpscnt,
384                                 mdrcnt,
385                                 mprcnt);
386         }
387
388         if (strequal(name,"WKSSVC") ||
389             strequal(name,"SRVSVC") ||
390             strequal(name,"WINREG") ||
391             strequal(name,"SAMR") ||
392             strequal(name,"LSARPC")) {
393                 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
394                 return api_fd_reply(conn,
395                                         vuid,
396                                         inbuf,
397                                         outbuf,
398                                         setup,
399                                         data,
400                                         params,
401                                         suwcnt,
402                                         tdscnt,
403                                         tpscnt,
404                                         mdrcnt,
405                                         mprcnt);
406         }
407
408         if (strlen(name) < 1) {
409                 return api_fd_reply(conn,
410                                         vuid,
411                                         inbuf,
412                                         outbuf,
413                                         setup,
414                                         data,
415                                         params,
416                                         suwcnt,
417                                         tdscnt,
418                                         tpscnt,
419                                         mdrcnt,
420                                         mprcnt);
421         }
422
423         if (setup)
424                 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n", (int)setup[0],(int)setup[1]));
425
426         return 0;
427 }
428
429 static NTSTATUS handle_trans(connection_struct *conn,
430                                 struct trans_state *state,
431                                 const char *inbuf,
432                                 char *outbuf,
433                                 int *outsize)
434 {
435         char *local_machine_name;
436         int name_offset = 0;
437
438         DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
439                  state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
440                  (unsigned int)state->setup_count));
441
442         /*
443          * WinCE wierdness....
444          */
445
446         local_machine_name = talloc_asprintf(state, "\\%s\\",
447                                              get_local_machine_name());
448
449         if (local_machine_name == NULL) {
450                 return NT_STATUS_NO_MEMORY;
451         }
452
453         if (strnequal(state->name, local_machine_name,
454                       strlen(local_machine_name))) {
455                 name_offset = strlen(local_machine_name)-1;
456         }
457
458         if (!strnequal(&state->name[name_offset], "\\PIPE",
459                        strlen("\\PIPE"))) {
460                 return NT_STATUS_NOT_SUPPORTED;
461         }
462         
463         name_offset += strlen("\\PIPE");
464
465         /* Win9x weirdness.  When talking to a unicode server Win9x
466            only sends \PIPE instead of \PIPE\ */
467
468         if (state->name[name_offset] == '\\')
469                 name_offset++;
470
471         DEBUG(5,("calling named_pipe\n"));
472         *outsize = named_pipe(conn,
473                                 state->vuid,
474                                 inbuf,
475                                 outbuf,
476                                 state->name+name_offset,
477                                 state->setup,state->data,
478                                 state->param,
479                                 state->setup_count,state->total_data,
480                                 state->total_param,
481                                 state->max_setup_return,
482                                 state->max_data_return,
483                                 state->max_param_return);
484
485         if (*outsize == 0) {
486                 return NT_STATUS_NOT_SUPPORTED;
487         }
488
489         if (state->close_on_completion)
490                 close_cnum(conn,state->vuid);
491
492         return NT_STATUS_OK;
493 }
494
495 /****************************************************************************
496  Reply to a SMBtrans.
497  ****************************************************************************/
498
499 int reply_trans(connection_struct *conn,
500                 char *inbuf,
501                 char *outbuf,
502                 int size,
503                 int bufsize)
504 {
505         int outsize = 0;
506         unsigned int dsoff = SVAL(inbuf, smb_dsoff);
507         unsigned int dscnt = SVAL(inbuf, smb_dscnt);
508         unsigned int psoff = SVAL(inbuf, smb_psoff);
509         unsigned int pscnt = SVAL(inbuf, smb_pscnt);
510         struct trans_state *state;
511         NTSTATUS result;
512
513         START_PROFILE(SMBtrans);
514
515         result = allow_new_trans(conn->pending_trans, SVAL(inbuf, smb_mid));
516         if (!NT_STATUS_IS_OK(result)) {
517                 DEBUG(2, ("Got invalid trans request: %s\n",
518                           nt_errstr(result)));
519                 END_PROFILE(SMBtrans);
520                 return ERROR_NT(result);
521         }
522
523         if ((state = TALLOC_P(conn->mem_ctx, struct trans_state)) == NULL) {
524                 DEBUG(0, ("talloc failed\n"));
525                 END_PROFILE(SMBtrans);
526                 return ERROR_NT(NT_STATUS_NO_MEMORY);
527         }
528
529         state->cmd = SMBtrans;
530
531         state->mid = SVAL(inbuf, smb_mid);
532         state->vuid = SVAL(inbuf, smb_uid);
533         state->setup_count = CVAL(inbuf, smb_suwcnt);
534         state->setup = NULL;
535         state->total_param = SVAL(inbuf, smb_tpscnt);
536         state->param = NULL;
537         state->total_data = SVAL(inbuf, smb_tdscnt);
538         state->data = NULL;
539         state->max_param_return = SVAL(inbuf, smb_mprcnt);
540         state->max_data_return = SVAL(inbuf, smb_mdrcnt);
541         state->max_setup_return = CVAL(inbuf, smb_msrcnt);
542         state->close_on_completion = BITSETW(inbuf+smb_vwv5,0);
543         state->one_way = BITSETW(inbuf+smb_vwv5,1);
544
545         memset(state->name, '\0',sizeof(state->name));
546         srvstr_pull_buf(inbuf, state->name, smb_buf(inbuf),
547                         sizeof(state->name), STR_TERMINATE);
548         
549         if ((dscnt > state->total_data) || (pscnt > state->total_param))
550                 goto bad_param;
551
552         if (state->total_data)  {
553                 /* Can't use talloc here, the core routines do realloc on the
554                  * params and data. Out of paranoia, 100 bytes too many. */
555                 state->data = (char *)SMB_MALLOC(state->total_data+100);
556                 if (state->data == NULL) {
557                         DEBUG(0,("reply_trans: data malloc fail for %u "
558                                  "bytes !\n", (unsigned int)state->total_data));
559                         TALLOC_FREE(state);
560                         END_PROFILE(SMBtrans);
561                         return(ERROR_DOS(ERRDOS,ERRnomem));
562                 } 
563                 /* null-terminate the slack space */
564                 memset(&state->data[state->total_data], 0, 100);
565                 if ((dsoff+dscnt < dsoff) || (dsoff+dscnt < dscnt))
566                         goto bad_param;
567                 if ((smb_base(inbuf)+dsoff+dscnt > inbuf + size) ||
568                     (smb_base(inbuf)+dsoff+dscnt < smb_base(inbuf)))
569                         goto bad_param;
570
571                 memcpy(state->data,smb_base(inbuf)+dsoff,dscnt);
572         }
573
574         if (state->total_param) {
575                 /* Can't use talloc here, the core routines do realloc on the
576                  * params and data. Out of paranoia, 100 bytes too many */
577                 state->param = (char *)SMB_MALLOC(state->total_param+100);
578                 if (state->param == NULL) {
579                         DEBUG(0,("reply_trans: param malloc fail for %u "
580                                  "bytes !\n", (unsigned int)state->total_param));
581                         SAFE_FREE(state->data);
582                         TALLOC_FREE(state);
583                         END_PROFILE(SMBtrans);
584                         return(ERROR_DOS(ERRDOS,ERRnomem));
585                 } 
586                 /* null-terminate the slack space */
587                 memset(&state->param[state->total_param], 0, 100);
588                 if ((psoff+pscnt < psoff) || (psoff+pscnt < pscnt))
589                         goto bad_param;
590                 if ((smb_base(inbuf)+psoff+pscnt > inbuf + size) ||
591                     (smb_base(inbuf)+psoff+pscnt < smb_base(inbuf)))
592                         goto bad_param;
593
594                 memcpy(state->param,smb_base(inbuf)+psoff,pscnt);
595         }
596
597         state->received_data  = dscnt;
598         state->received_param = pscnt;
599
600         if (state->setup_count) {
601                 unsigned int i;
602                 if((state->setup = TALLOC_ARRAY(
603                             state, uint16, state->setup_count)) == NULL) {
604                         DEBUG(0,("reply_trans: setup malloc fail for %u "
605                                  "bytes !\n", (unsigned int)
606                                  (state->setup_count * sizeof(uint16))));
607                         TALLOC_FREE(state);
608                         END_PROFILE(SMBtrans);
609                         return(ERROR_DOS(ERRDOS,ERRnomem));
610                 } 
611                 if (inbuf+smb_vwv14+(state->setup_count*SIZEOFWORD) >
612                     inbuf + size)
613                         goto bad_param;
614                 if ((smb_vwv14+(state->setup_count*SIZEOFWORD) < smb_vwv14) ||
615                     (smb_vwv14+(state->setup_count*SIZEOFWORD) <
616                      (state->setup_count*SIZEOFWORD)))
617                         goto bad_param;
618
619                 for (i=0;i<state->setup_count;i++)
620                         state->setup[i] = SVAL(inbuf,smb_vwv14+i*SIZEOFWORD);
621         }
622
623         state->received_param = pscnt;
624
625         if ((state->received_param == state->total_param) &&
626             (state->received_data == state->total_data)) {
627
628                 result = handle_trans(conn, state, inbuf, outbuf, &outsize);
629
630                 SAFE_FREE(state->data);
631                 SAFE_FREE(state->param);
632                 TALLOC_FREE(state);
633
634                 if (!NT_STATUS_IS_OK(result)) {
635                         END_PROFILE(SMBtrans);
636                         return ERROR_NT(result);
637                 }
638
639                 if (outsize == 0) {
640                         END_PROFILE(SMBtrans);
641                         return ERROR_NT(NT_STATUS_INTERNAL_ERROR);
642                 }
643
644                 END_PROFILE(SMBtrans);
645                 return outsize;
646         }
647
648         DLIST_ADD(conn->pending_trans, state);
649
650         /* We need to send an interim response then receive the rest
651            of the parameter/data bytes */
652         outsize = set_message(inbuf,outbuf,0,0,True);
653         show_msg(outbuf);
654         END_PROFILE(SMBtrans);
655         return outsize;
656
657   bad_param:
658
659         DEBUG(0,("reply_trans: invalid trans parameters\n"));
660         SAFE_FREE(state->data);
661         SAFE_FREE(state->param);
662         TALLOC_FREE(state);
663         END_PROFILE(SMBtrans);
664         return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
665 }
666
667 /****************************************************************************
668  Reply to a secondary SMBtrans.
669  ****************************************************************************/
670
671 int reply_transs(connection_struct *conn, char *inbuf,char *outbuf,
672                  int size, int bufsize)
673 {
674         int outsize = 0;
675         unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
676         struct trans_state *state;
677         NTSTATUS result;
678
679         START_PROFILE(SMBtranss);
680
681         show_msg(inbuf);
682
683         for (state = conn->pending_trans; state != NULL;
684              state = state->next) {
685                 if (state->mid == SVAL(inbuf,smb_mid)) {
686                         break;
687                 }
688         }
689
690         if ((state == NULL) || (state->cmd != SMBtrans)) {
691                 END_PROFILE(SMBtranss);
692                 return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
693         }
694
695         /* Revise total_params and total_data in case they have changed
696          * downwards */
697
698         if (SVAL(inbuf, smb_vwv0) < state->total_param)
699                 state->total_param = SVAL(inbuf,smb_vwv0);
700         if (SVAL(inbuf, smb_vwv1) < state->total_data)
701                 state->total_data = SVAL(inbuf,smb_vwv1);
702
703         pcnt = SVAL(inbuf, smb_spscnt);
704         poff = SVAL(inbuf, smb_spsoff);
705         pdisp = SVAL(inbuf, smb_spsdisp);
706
707         dcnt = SVAL(inbuf, smb_sdscnt);
708         doff = SVAL(inbuf, smb_sdsoff);
709         ddisp = SVAL(inbuf, smb_sdsdisp);
710
711         state->received_param += pcnt;
712         state->received_data += dcnt;
713                 
714         if ((state->received_data > state->total_data) ||
715             (state->received_param > state->total_param))
716                 goto bad_param;
717                 
718         if (pcnt) {
719                 if (pdisp+pcnt > state->total_param)
720                         goto bad_param;
721                 if ((pdisp+pcnt < pdisp) || (pdisp+pcnt < pcnt))
722                         goto bad_param;
723                 if (pdisp > state->total_param)
724                         goto bad_param;
725                 if ((smb_base(inbuf) + poff + pcnt > inbuf + size) ||
726                     (smb_base(inbuf) + poff + pcnt < smb_base(inbuf)))
727                         goto bad_param;
728                 if (state->param + pdisp < state->param)
729                         goto bad_param;
730
731                 memcpy(state->param+pdisp,smb_base(inbuf)+poff,
732                        pcnt);
733         }
734
735         if (dcnt) {
736                 if (ddisp+dcnt > state->total_data)
737                         goto bad_param;
738                 if ((ddisp+dcnt < ddisp) || (ddisp+dcnt < dcnt))
739                         goto bad_param;
740                 if (ddisp > state->total_data)
741                         goto bad_param;
742                 if ((smb_base(inbuf) + doff + dcnt > inbuf + size) ||
743                     (smb_base(inbuf) + doff + dcnt < smb_base(inbuf)))
744                         goto bad_param;
745                 if (state->data + ddisp < state->data)
746                         goto bad_param;
747
748                 memcpy(state->data+ddisp, smb_base(inbuf)+doff,
749                        dcnt);      
750         }
751
752         if ((state->received_param < state->total_param) ||
753             (state->received_data < state->total_data)) {
754                 END_PROFILE(SMBtranss);
755                 return -1;
756         }
757
758         /* construct_reply_common has done us the favor to pre-fill the
759          * command field with SMBtranss which is wrong :-)
760          */
761         SCVAL(outbuf,smb_com,SMBtrans);
762
763         result = handle_trans(conn, state, inbuf, outbuf, &outsize);
764
765         DLIST_REMOVE(conn->pending_trans, state);
766         SAFE_FREE(state->data);
767         SAFE_FREE(state->param);
768         TALLOC_FREE(state);
769
770         if ((outsize == 0) || !NT_STATUS_IS_OK(result)) {
771                 END_PROFILE(SMBtranss);
772                 return(ERROR_DOS(ERRSRV,ERRnosupport));
773         }
774         
775         END_PROFILE(SMBtranss);
776         return(outsize);
777
778   bad_param:
779
780         DEBUG(0,("reply_transs: invalid trans parameters\n"));
781         DLIST_REMOVE(conn->pending_trans, state);
782         SAFE_FREE(state->data);
783         SAFE_FREE(state->param);
784         TALLOC_FREE(state);
785         END_PROFILE(SMBtranss);
786         return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
787 }