s3: Remove smbd_server_conn from send_trans_reply
[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         struct smbd_server_connection *sconn = req->sconn;
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         bool busy;
231
232         if (!fsp_is_np(fsp)) {
233                 api_no_reply(conn, req);
234                 return;
235         }
236
237         /*
238          * Trans requests are only allowed
239          * if no other Trans or Read is active
240          */
241         busy = np_read_in_progress(fsp->fake_file_handle);
242         if (busy) {
243                 reply_nterror(req, NT_STATUS_PIPE_BUSY);
244                 return;
245         }
246
247         state = talloc(req, struct dcerpc_cmd_state);
248         if (state == NULL) {
249                 reply_nterror(req, NT_STATUS_NO_MEMORY);
250                 return;
251         }
252         req->async_priv = state;
253
254         state->handle = fsp->fake_file_handle;
255
256         /*
257          * This memdup severely sucks. But doing it properly essentially means
258          * to rewrite lanman.c, something which I don't really want to do now.
259          */
260         state->data = (uint8_t *)talloc_memdup(state, data, length);
261         if (state->data == NULL) {
262                 reply_nterror(req, NT_STATUS_NO_MEMORY);
263                 return;
264         }
265         state->num_data = length;
266         state->max_read = max_read;
267
268         subreq = np_write_send(state, smbd_event_context(), state->handle,
269                                state->data, length);
270         if (subreq == NULL) {
271                 TALLOC_FREE(state);
272                 reply_nterror(req, NT_STATUS_NO_MEMORY);
273                 return;
274         }
275         tevent_req_set_callback(subreq, api_dcerpc_cmd_write_done,
276                                 talloc_move(conn, &req));
277 }
278
279 static void api_dcerpc_cmd_write_done(struct tevent_req *subreq)
280 {
281         struct smb_request *req = tevent_req_callback_data(
282                 subreq, struct smb_request);
283         struct dcerpc_cmd_state *state = talloc_get_type_abort(
284                 req->async_priv, struct dcerpc_cmd_state);
285         NTSTATUS status;
286         ssize_t nwritten = -1;
287
288         status = np_write_recv(subreq, &nwritten);
289         TALLOC_FREE(subreq);
290         if (!NT_STATUS_IS_OK(status) || (nwritten != state->num_data)) {
291                 DEBUG(10, ("Could not write to pipe: %s (%d/%d)\n",
292                            nt_errstr(status), (int)state->num_data,
293                            (int)nwritten));
294                 reply_nterror(req, NT_STATUS_PIPE_NOT_AVAILABLE);
295                 goto send;
296         }
297
298         state->data = TALLOC_REALLOC_ARRAY(state, state->data, uint8_t,
299                                            state->max_read);
300         if (state->data == NULL) {
301                 reply_nterror(req, NT_STATUS_NO_MEMORY);
302                 goto send;
303         }
304
305         subreq = np_read_send(req->conn, smbd_event_context(),
306                               state->handle, state->data, state->max_read);
307         if (subreq == NULL) {
308                 reply_nterror(req, NT_STATUS_NO_MEMORY);
309                 goto send;
310         }
311         tevent_req_set_callback(subreq, api_dcerpc_cmd_read_done, req);
312         return;
313
314  send:
315         if (!srv_send_smb(
316                     smbd_server_fd(), (char *)req->outbuf,
317                     true, req->seqnum+1,
318                     IS_CONN_ENCRYPTED(req->conn) || req->encrypted,
319                     &req->pcd)) {
320                 exit_server_cleanly("construct_reply: srv_send_smb failed.");
321         }
322         TALLOC_FREE(req);
323 }
324
325 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq)
326 {
327         struct smb_request *req = tevent_req_callback_data(
328                 subreq, struct smb_request);
329         struct dcerpc_cmd_state *state = talloc_get_type_abort(
330                 req->async_priv, struct dcerpc_cmd_state);
331         NTSTATUS status;
332         ssize_t nread;
333         bool is_data_outstanding;
334
335         status = np_read_recv(subreq, &nread, &is_data_outstanding);
336         TALLOC_FREE(subreq);
337
338         if (!NT_STATUS_IS_OK(status)) {
339                 DEBUG(10, ("Could not read from to pipe: %s\n",
340                            nt_errstr(status)));
341                 reply_nterror(req, status);
342
343                 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
344                                   true, req->seqnum+1,
345                                   IS_CONN_ENCRYPTED(req->conn)
346                                   ||req->encrypted, &req->pcd)) {
347                         exit_server_cleanly("construct_reply: srv_send_smb "
348                                             "failed.");
349                 }
350                 TALLOC_FREE(req);
351                 return;
352         }
353
354         send_trans_reply(req->conn, req, NULL, 0, (char *)state->data, nread,
355                          is_data_outstanding);
356         TALLOC_FREE(req);
357 }
358
359 /****************************************************************************
360  WaitNamedPipeHandleState 
361 ****************************************************************************/
362
363 static void api_WNPHS(connection_struct *conn, struct smb_request *req,
364                       struct files_struct *fsp, char *param, int param_len)
365 {
366         if (!param || param_len < 2) {
367                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
368                 return;
369         }
370
371         DEBUG(4,("WaitNamedPipeHandleState priority %x\n",
372                  (int)SVAL(param,0)));
373
374         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
375 }
376
377
378 /****************************************************************************
379  SetNamedPipeHandleState 
380 ****************************************************************************/
381
382 static void api_SNPHS(connection_struct *conn, struct smb_request *req,
383                       struct files_struct *fsp, char *param, int param_len)
384 {
385         if (!param || param_len < 2) {
386                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
387                 return;
388         }
389
390         DEBUG(4,("SetNamedPipeHandleState to code %x\n", (int)SVAL(param,0)));
391
392         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
393 }
394
395
396 /****************************************************************************
397  When no reply is generated, indicate unsupported.
398  ****************************************************************************/
399
400 static void api_no_reply(connection_struct *conn, struct smb_request *req)
401 {
402         char rparam[4];
403
404         /* unsupported */
405         SSVAL(rparam,0,NERR_notsupported);
406         SSVAL(rparam,2,0); /* converter word */
407
408         DEBUG(3,("Unsupported API fd command\n"));
409
410         /* now send the reply */
411         send_trans_reply(conn, req, rparam, 4, NULL, 0, False);
412
413         return;
414 }
415
416 /****************************************************************************
417  Handle remote api calls delivered to a named pipe already opened.
418  ****************************************************************************/
419
420 static void api_fd_reply(connection_struct *conn, uint16 vuid,
421                          struct smb_request *req,
422                          uint16 *setup, uint8_t *data, char *params,
423                          int suwcnt, int tdscnt, int tpscnt,
424                          int mdrcnt, int mprcnt)
425 {
426         struct files_struct *fsp;
427         int pnum;
428         int subcommand;
429
430         DEBUG(5,("api_fd_reply\n"));
431
432         /* First find out the name of this file. */
433         if (suwcnt != 2) {
434                 DEBUG(0,("Unexpected named pipe transaction.\n"));
435                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
436                 return;
437         }
438
439         /* Get the file handle and hence the file name. */
440         /* 
441          * NB. The setup array has already been transformed
442          * via SVAL and so is in host byte order.
443          */
444         pnum = ((int)setup[1]) & 0xFFFF;
445         subcommand = ((int)setup[0]) & 0xFFFF;
446
447         fsp = file_fsp(req, pnum);
448
449         if (!fsp_is_np(fsp)) {
450                 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
451                         /* Win9x does this call with a unicode pipe name, not a pnum. */
452                         /* Just return success for now... */
453                         DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
454                         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
455                         return;
456                 }
457
458                 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
459                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
460                 return;
461         }
462
463         if (vuid != fsp->vuid) {
464                 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
465                           "expected %d\n", pnum, vuid, fsp->vuid));
466                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
467                 return;
468         }
469
470         DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n",
471                  subcommand, fsp_str_dbg(fsp), pnum));
472
473         DEBUG(10, ("api_fd_reply: p:%p max_trans_reply: %d\n", fsp, mdrcnt));
474
475         switch (subcommand) {
476         case TRANSACT_DCERPCCMD: {
477                 /* dce/rpc command */
478                 api_dcerpc_cmd(conn, req, fsp, (uint8_t *)data, tdscnt,
479                                mdrcnt);
480                 break;
481         }
482         case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
483                 /* Wait Named Pipe Handle state */
484                 api_WNPHS(conn, req, fsp, params, tpscnt);
485                 break;
486         case TRANSACT_SETNAMEDPIPEHANDLESTATE:
487                 /* Set Named Pipe Handle state */
488                 api_SNPHS(conn, req, fsp, params, tpscnt);
489                 break;
490         default:
491                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
492                 return;
493         }
494 }
495
496 /****************************************************************************
497  Handle named pipe commands.
498 ****************************************************************************/
499
500 static void named_pipe(connection_struct *conn, uint16 vuid,
501                        struct smb_request *req,
502                        const char *name, uint16 *setup,
503                        char *data, char *params,
504                        int suwcnt, int tdscnt,int tpscnt,
505                        int msrcnt, int mdrcnt, int mprcnt)
506 {
507         DEBUG(3,("named pipe command on <%s> name\n", name));
508
509         if (strequal(name,"LANMAN")) {
510                 api_reply(conn, vuid, req,
511                           data, params,
512                           tdscnt, tpscnt,
513                           mdrcnt, mprcnt);
514                 return;
515         }
516
517         if (strequal(name,"WKSSVC") ||
518             strequal(name,"SRVSVC") ||
519             strequal(name,"WINREG") ||
520             strequal(name,"SAMR") ||
521             strequal(name,"LSARPC")) {
522
523                 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
524
525                 api_fd_reply(conn, vuid, req,
526                              setup, (uint8_t *)data, params,
527                              suwcnt, tdscnt, tpscnt,
528                              mdrcnt, mprcnt);
529                 return;
530         }
531
532         if (strlen(name) < 1) {
533                 api_fd_reply(conn, vuid, req,
534                              setup, (uint8_t *)data,
535                              params, suwcnt, tdscnt,
536                              tpscnt, mdrcnt, mprcnt);
537                 return;
538         }
539
540         if (setup)
541                 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
542                          (int)setup[0],(int)setup[1]));
543
544         reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
545         return;
546 }
547
548 static void handle_trans(connection_struct *conn, struct smb_request *req,
549                          struct trans_state *state)
550 {
551         char *local_machine_name;
552         int name_offset = 0;
553
554         DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
555                  state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
556                  (unsigned int)state->setup_count));
557
558         /*
559          * WinCE wierdness....
560          */
561
562         local_machine_name = talloc_asprintf(state, "\\%s\\",
563                                              get_local_machine_name());
564
565         if (local_machine_name == NULL) {
566                 reply_nterror(req, NT_STATUS_NO_MEMORY);
567                 return;
568         }
569
570         if (strnequal(state->name, local_machine_name,
571                       strlen(local_machine_name))) {
572                 name_offset = strlen(local_machine_name)-1;
573         }
574
575         if (!strnequal(&state->name[name_offset], "\\PIPE",
576                        strlen("\\PIPE"))) {
577                 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
578                 return;
579         }
580
581         name_offset += strlen("\\PIPE");
582
583         /* Win9x weirdness.  When talking to a unicode server Win9x
584            only sends \PIPE instead of \PIPE\ */
585
586         if (state->name[name_offset] == '\\')
587                 name_offset++;
588
589         DEBUG(5,("calling named_pipe\n"));
590         named_pipe(conn, state->vuid, req,
591                    state->name+name_offset,
592                    state->setup,state->data,
593                    state->param,
594                    state->setup_count,state->total_data,
595                    state->total_param,
596                    state->max_setup_return,
597                    state->max_data_return,
598                    state->max_param_return);
599
600         if (state->close_on_completion) {
601                 close_cnum(conn,state->vuid);
602                 req->conn = NULL;
603         }
604
605         return;
606 }
607
608 /****************************************************************************
609  Reply to a SMBtrans.
610  ****************************************************************************/
611
612 void reply_trans(struct smb_request *req)
613 {
614         connection_struct *conn = req->conn;
615         unsigned int dsoff;
616         unsigned int dscnt;
617         unsigned int psoff;
618         unsigned int pscnt;
619         struct trans_state *state;
620         NTSTATUS result;
621
622         START_PROFILE(SMBtrans);
623
624         if (req->wct < 14) {
625                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
626                 END_PROFILE(SMBtrans);
627                 return;
628         }
629
630         dsoff = SVAL(req->vwv+12, 0);
631         dscnt = SVAL(req->vwv+11, 0);
632         psoff = SVAL(req->vwv+10, 0);
633         pscnt = SVAL(req->vwv+9, 0);
634
635         result = allow_new_trans(conn->pending_trans, req->mid);
636         if (!NT_STATUS_IS_OK(result)) {
637                 DEBUG(2, ("Got invalid trans request: %s\n",
638                           nt_errstr(result)));
639                 reply_nterror(req, result);
640                 END_PROFILE(SMBtrans);
641                 return;
642         }
643
644         if ((state = TALLOC_P(conn, struct trans_state)) == NULL) {
645                 DEBUG(0, ("talloc failed\n"));
646                 reply_nterror(req, NT_STATUS_NO_MEMORY);
647                 END_PROFILE(SMBtrans);
648                 return;
649         }
650
651         state->cmd = SMBtrans;
652
653         state->mid = req->mid;
654         state->vuid = req->vuid;
655         state->setup_count = CVAL(req->vwv+13, 0);
656         state->setup = NULL;
657         state->total_param = SVAL(req->vwv+0, 0);
658         state->param = NULL;
659         state->total_data = SVAL(req->vwv+1, 0);
660         state->data = NULL;
661         state->max_param_return = SVAL(req->vwv+2, 0);
662         state->max_data_return = SVAL(req->vwv+3, 0);
663         state->max_setup_return = CVAL(req->vwv+4, 0);
664         state->close_on_completion = BITSETW(req->vwv+5, 0);
665         state->one_way = BITSETW(req->vwv+5, 1);
666
667         srvstr_pull_req_talloc(state, req, &state->name, req->buf,
668                                STR_TERMINATE);
669
670         if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
671                         !state->name)
672                 goto bad_param;
673
674         if (state->total_data)  {
675
676                 if (trans_oob(state->total_data, 0, dscnt)
677                     || trans_oob(smb_len(req->inbuf), dsoff, dscnt)) {
678                         goto bad_param;
679                 }
680
681                 /* Can't use talloc here, the core routines do realloc on the
682                  * params and data. Out of paranoia, 100 bytes too many. */
683                 state->data = (char *)SMB_MALLOC(state->total_data+100);
684                 if (state->data == NULL) {
685                         DEBUG(0,("reply_trans: data malloc fail for %u "
686                                  "bytes !\n", (unsigned int)state->total_data));
687                         TALLOC_FREE(state);
688                         reply_nterror(req, NT_STATUS_NO_MEMORY);
689                         END_PROFILE(SMBtrans);
690                         return;
691                 }
692                 /* null-terminate the slack space */
693                 memset(&state->data[state->total_data], 0, 100);
694
695                 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
696         }
697
698         if (state->total_param) {
699
700                 if (trans_oob(state->total_param, 0, pscnt)
701                     || trans_oob(smb_len(req->inbuf), psoff, pscnt)) {
702                         goto bad_param;
703                 }
704
705                 /* Can't use talloc here, the core routines do realloc on the
706                  * params and data. Out of paranoia, 100 bytes too many */
707                 state->param = (char *)SMB_MALLOC(state->total_param+100);
708                 if (state->param == NULL) {
709                         DEBUG(0,("reply_trans: param malloc fail for %u "
710                                  "bytes !\n", (unsigned int)state->total_param));
711                         SAFE_FREE(state->data);
712                         TALLOC_FREE(state);
713                         reply_nterror(req, NT_STATUS_NO_MEMORY);
714                         END_PROFILE(SMBtrans);
715                         return;
716                 } 
717                 /* null-terminate the slack space */
718                 memset(&state->param[state->total_param], 0, 100);
719
720                 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
721         }
722
723         state->received_data  = dscnt;
724         state->received_param = pscnt;
725
726         if (state->setup_count) {
727                 unsigned int i;
728
729                 /*
730                  * No overflow possible here, state->setup_count is an
731                  * unsigned int, being filled by a single byte from
732                  * CVAL(req->vwv+13, 0) above. The cast in the comparison
733                  * below is not necessary, it's here to clarify things. The
734                  * validity of req->vwv and req->wct has been checked in
735                  * init_smb_request already.
736                  */
737                 if (state->setup_count + 14 > (unsigned int)req->wct) {
738                         goto bad_param;
739                 }
740
741                 if((state->setup = TALLOC_ARRAY(
742                             state, uint16, state->setup_count)) == NULL) {
743                         DEBUG(0,("reply_trans: setup malloc fail for %u "
744                                  "bytes !\n", (unsigned int)
745                                  (state->setup_count * sizeof(uint16))));
746                         SAFE_FREE(state->data);
747                         SAFE_FREE(state->param);
748                         TALLOC_FREE(state);
749                         reply_nterror(req, NT_STATUS_NO_MEMORY);
750                         END_PROFILE(SMBtrans);
751                         return;
752                 } 
753
754                 for (i=0;i<state->setup_count;i++) {
755                         state->setup[i] = SVAL(req->vwv + 14 + i, 0);
756                 }
757         }
758
759         state->received_param = pscnt;
760
761         if ((state->received_param != state->total_param) ||
762             (state->received_data != state->total_data)) {
763                 DLIST_ADD(conn->pending_trans, state);
764
765                 /* We need to send an interim response then receive the rest
766                    of the parameter/data bytes */
767                 reply_outbuf(req, 0, 0);
768                 show_msg((char *)req->outbuf);
769                 END_PROFILE(SMBtrans);
770                 return;
771         }
772
773         talloc_steal(talloc_tos(), state);
774
775         handle_trans(conn, req, state);
776
777         SAFE_FREE(state->data);
778         SAFE_FREE(state->param);
779         TALLOC_FREE(state);
780
781         END_PROFILE(SMBtrans);
782         return;
783
784   bad_param:
785
786         DEBUG(0,("reply_trans: invalid trans parameters\n"));
787         SAFE_FREE(state->data);
788         SAFE_FREE(state->param);
789         TALLOC_FREE(state);
790         END_PROFILE(SMBtrans);
791         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
792         return;
793 }
794
795 /****************************************************************************
796  Reply to a secondary SMBtrans.
797  ****************************************************************************/
798
799 void reply_transs(struct smb_request *req)
800 {
801         connection_struct *conn = req->conn;
802         unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
803         struct trans_state *state;
804
805         START_PROFILE(SMBtranss);
806
807         show_msg((char *)req->inbuf);
808
809         if (req->wct < 8) {
810                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
811                 END_PROFILE(SMBtranss);
812                 return;
813         }
814
815         for (state = conn->pending_trans; state != NULL;
816              state = state->next) {
817                 if (state->mid == req->mid) {
818                         break;
819                 }
820         }
821
822         if ((state == NULL) || (state->cmd != SMBtrans)) {
823                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
824                 END_PROFILE(SMBtranss);
825                 return;
826         }
827
828         /* Revise total_params and total_data in case they have changed
829          * downwards */
830
831         if (SVAL(req->vwv+0, 0) < state->total_param)
832                 state->total_param = SVAL(req->vwv+0, 0);
833         if (SVAL(req->vwv+1, 0) < state->total_data)
834                 state->total_data = SVAL(req->vwv+1, 0);
835
836         pcnt = SVAL(req->vwv+2, 0);
837         poff = SVAL(req->vwv+3, 0);
838         pdisp = SVAL(req->vwv+4, 0);
839
840         dcnt = SVAL(req->vwv+5, 0);
841         doff = SVAL(req->vwv+6, 0);
842         ddisp = SVAL(req->vwv+7, 0);
843
844         state->received_param += pcnt;
845         state->received_data += dcnt;
846
847         if ((state->received_data > state->total_data) ||
848             (state->received_param > state->total_param))
849                 goto bad_param;
850
851         if (pcnt) {
852                 if (trans_oob(state->total_param, pdisp, pcnt)
853                     || trans_oob(smb_len(req->inbuf), poff, pcnt)) {
854                         goto bad_param;
855                 }
856                 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,pcnt);
857         }
858
859         if (dcnt) {
860                 if (trans_oob(state->total_data, ddisp, dcnt)
861                     || trans_oob(smb_len(req->inbuf), doff, dcnt)) {
862                         goto bad_param;
863                 }
864                 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,dcnt);
865         }
866
867         if ((state->received_param < state->total_param) ||
868             (state->received_data < state->total_data)) {
869                 END_PROFILE(SMBtranss);
870                 return;
871         }
872
873         talloc_steal(talloc_tos(), state);
874
875         handle_trans(conn, req, state);
876
877         DLIST_REMOVE(conn->pending_trans, state);
878         SAFE_FREE(state->data);
879         SAFE_FREE(state->param);
880         TALLOC_FREE(state);
881
882         END_PROFILE(SMBtranss);
883         return;
884
885   bad_param:
886
887         DEBUG(0,("reply_transs: invalid trans parameters\n"));
888         DLIST_REMOVE(conn->pending_trans, state);
889         SAFE_FREE(state->data);
890         SAFE_FREE(state->param);
891         TALLOC_FREE(state);
892         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
893         END_PROFILE(SMBtranss);
894         return;
895 }