s3: Fix some error messages
[amitay/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("api_dcerpc_cmd_write_done: "
321                                     "srv_send_smb failed.");
322         }
323         TALLOC_FREE(req);
324 }
325
326 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq)
327 {
328         struct smb_request *req = tevent_req_callback_data(
329                 subreq, struct smb_request);
330         struct dcerpc_cmd_state *state = talloc_get_type_abort(
331                 req->async_priv, struct dcerpc_cmd_state);
332         NTSTATUS status;
333         ssize_t nread;
334         bool is_data_outstanding;
335
336         status = np_read_recv(subreq, &nread, &is_data_outstanding);
337         TALLOC_FREE(subreq);
338
339         if (!NT_STATUS_IS_OK(status)) {
340                 DEBUG(10, ("Could not read from to pipe: %s\n",
341                            nt_errstr(status)));
342                 reply_nterror(req, status);
343
344                 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
345                                   true, req->seqnum+1,
346                                   IS_CONN_ENCRYPTED(req->conn)
347                                   ||req->encrypted, &req->pcd)) {
348                         exit_server_cleanly("api_dcerpc_cmd_read_done: "
349                                             "srv_send_smb failed.");
350                 }
351                 TALLOC_FREE(req);
352                 return;
353         }
354
355         send_trans_reply(req->conn, req, NULL, 0, (char *)state->data, nread,
356                          is_data_outstanding);
357         TALLOC_FREE(req);
358 }
359
360 /****************************************************************************
361  WaitNamedPipeHandleState 
362 ****************************************************************************/
363
364 static void api_WNPHS(connection_struct *conn, struct smb_request *req,
365                       struct files_struct *fsp, char *param, int param_len)
366 {
367         if (!param || param_len < 2) {
368                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
369                 return;
370         }
371
372         DEBUG(4,("WaitNamedPipeHandleState priority %x\n",
373                  (int)SVAL(param,0)));
374
375         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
376 }
377
378
379 /****************************************************************************
380  SetNamedPipeHandleState 
381 ****************************************************************************/
382
383 static void api_SNPHS(connection_struct *conn, struct smb_request *req,
384                       struct files_struct *fsp, char *param, int param_len)
385 {
386         if (!param || param_len < 2) {
387                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
388                 return;
389         }
390
391         DEBUG(4,("SetNamedPipeHandleState to code %x\n", (int)SVAL(param,0)));
392
393         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
394 }
395
396
397 /****************************************************************************
398  When no reply is generated, indicate unsupported.
399  ****************************************************************************/
400
401 static void api_no_reply(connection_struct *conn, struct smb_request *req)
402 {
403         char rparam[4];
404
405         /* unsupported */
406         SSVAL(rparam,0,NERR_notsupported);
407         SSVAL(rparam,2,0); /* converter word */
408
409         DEBUG(3,("Unsupported API fd command\n"));
410
411         /* now send the reply */
412         send_trans_reply(conn, req, rparam, 4, NULL, 0, False);
413
414         return;
415 }
416
417 /****************************************************************************
418  Handle remote api calls delivered to a named pipe already opened.
419  ****************************************************************************/
420
421 static void api_fd_reply(connection_struct *conn, uint16 vuid,
422                          struct smb_request *req,
423                          uint16 *setup, uint8_t *data, char *params,
424                          int suwcnt, int tdscnt, int tpscnt,
425                          int mdrcnt, int mprcnt)
426 {
427         struct files_struct *fsp;
428         int pnum;
429         int subcommand;
430
431         DEBUG(5,("api_fd_reply\n"));
432
433         /* First find out the name of this file. */
434         if (suwcnt != 2) {
435                 DEBUG(0,("Unexpected named pipe transaction.\n"));
436                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
437                 return;
438         }
439
440         /* Get the file handle and hence the file name. */
441         /* 
442          * NB. The setup array has already been transformed
443          * via SVAL and so is in host byte order.
444          */
445         pnum = ((int)setup[1]) & 0xFFFF;
446         subcommand = ((int)setup[0]) & 0xFFFF;
447
448         fsp = file_fsp(req, pnum);
449
450         if (!fsp_is_np(fsp)) {
451                 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
452                         /* Win9x does this call with a unicode pipe name, not a pnum. */
453                         /* Just return success for now... */
454                         DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
455                         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
456                         return;
457                 }
458
459                 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
460                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
461                 return;
462         }
463
464         if (vuid != fsp->vuid) {
465                 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
466                           "expected %d\n", pnum, vuid, fsp->vuid));
467                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
468                 return;
469         }
470
471         DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n",
472                  subcommand, fsp_str_dbg(fsp), pnum));
473
474         DEBUG(10, ("api_fd_reply: p:%p max_trans_reply: %d\n", fsp, mdrcnt));
475
476         switch (subcommand) {
477         case TRANSACT_DCERPCCMD: {
478                 /* dce/rpc command */
479                 api_dcerpc_cmd(conn, req, fsp, (uint8_t *)data, tdscnt,
480                                mdrcnt);
481                 break;
482         }
483         case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
484                 /* Wait Named Pipe Handle state */
485                 api_WNPHS(conn, req, fsp, params, tpscnt);
486                 break;
487         case TRANSACT_SETNAMEDPIPEHANDLESTATE:
488                 /* Set Named Pipe Handle state */
489                 api_SNPHS(conn, req, fsp, params, tpscnt);
490                 break;
491         default:
492                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
493                 return;
494         }
495 }
496
497 /****************************************************************************
498  Handle named pipe commands.
499 ****************************************************************************/
500
501 static void named_pipe(connection_struct *conn, uint16 vuid,
502                        struct smb_request *req,
503                        const char *name, uint16 *setup,
504                        char *data, char *params,
505                        int suwcnt, int tdscnt,int tpscnt,
506                        int msrcnt, int mdrcnt, int mprcnt)
507 {
508         DEBUG(3,("named pipe command on <%s> name\n", name));
509
510         if (strequal(name,"LANMAN")) {
511                 api_reply(conn, vuid, req,
512                           data, params,
513                           tdscnt, tpscnt,
514                           mdrcnt, mprcnt);
515                 return;
516         }
517
518         if (strequal(name,"WKSSVC") ||
519             strequal(name,"SRVSVC") ||
520             strequal(name,"WINREG") ||
521             strequal(name,"SAMR") ||
522             strequal(name,"LSARPC")) {
523
524                 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
525
526                 api_fd_reply(conn, vuid, req,
527                              setup, (uint8_t *)data, params,
528                              suwcnt, tdscnt, tpscnt,
529                              mdrcnt, mprcnt);
530                 return;
531         }
532
533         if (strlen(name) < 1) {
534                 api_fd_reply(conn, vuid, req,
535                              setup, (uint8_t *)data,
536                              params, suwcnt, tdscnt,
537                              tpscnt, mdrcnt, mprcnt);
538                 return;
539         }
540
541         if (setup)
542                 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
543                          (int)setup[0],(int)setup[1]));
544
545         reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
546         return;
547 }
548
549 static void handle_trans(connection_struct *conn, struct smb_request *req,
550                          struct trans_state *state)
551 {
552         char *local_machine_name;
553         int name_offset = 0;
554
555         DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
556                  state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
557                  (unsigned int)state->setup_count));
558
559         /*
560          * WinCE wierdness....
561          */
562
563         local_machine_name = talloc_asprintf(state, "\\%s\\",
564                                              get_local_machine_name());
565
566         if (local_machine_name == NULL) {
567                 reply_nterror(req, NT_STATUS_NO_MEMORY);
568                 return;
569         }
570
571         if (strnequal(state->name, local_machine_name,
572                       strlen(local_machine_name))) {
573                 name_offset = strlen(local_machine_name)-1;
574         }
575
576         if (!strnequal(&state->name[name_offset], "\\PIPE",
577                        strlen("\\PIPE"))) {
578                 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
579                 return;
580         }
581
582         name_offset += strlen("\\PIPE");
583
584         /* Win9x weirdness.  When talking to a unicode server Win9x
585            only sends \PIPE instead of \PIPE\ */
586
587         if (state->name[name_offset] == '\\')
588                 name_offset++;
589
590         DEBUG(5,("calling named_pipe\n"));
591         named_pipe(conn, state->vuid, req,
592                    state->name+name_offset,
593                    state->setup,state->data,
594                    state->param,
595                    state->setup_count,state->total_data,
596                    state->total_param,
597                    state->max_setup_return,
598                    state->max_data_return,
599                    state->max_param_return);
600
601         if (state->close_on_completion) {
602                 close_cnum(conn,state->vuid);
603                 req->conn = NULL;
604         }
605
606         return;
607 }
608
609 /****************************************************************************
610  Reply to a SMBtrans.
611  ****************************************************************************/
612
613 void reply_trans(struct smb_request *req)
614 {
615         connection_struct *conn = req->conn;
616         unsigned int dsoff;
617         unsigned int dscnt;
618         unsigned int psoff;
619         unsigned int pscnt;
620         struct trans_state *state;
621         NTSTATUS result;
622
623         START_PROFILE(SMBtrans);
624
625         if (req->wct < 14) {
626                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
627                 END_PROFILE(SMBtrans);
628                 return;
629         }
630
631         dsoff = SVAL(req->vwv+12, 0);
632         dscnt = SVAL(req->vwv+11, 0);
633         psoff = SVAL(req->vwv+10, 0);
634         pscnt = SVAL(req->vwv+9, 0);
635
636         result = allow_new_trans(conn->pending_trans, req->mid);
637         if (!NT_STATUS_IS_OK(result)) {
638                 DEBUG(2, ("Got invalid trans request: %s\n",
639                           nt_errstr(result)));
640                 reply_nterror(req, result);
641                 END_PROFILE(SMBtrans);
642                 return;
643         }
644
645         if ((state = TALLOC_P(conn, struct trans_state)) == NULL) {
646                 DEBUG(0, ("talloc failed\n"));
647                 reply_nterror(req, NT_STATUS_NO_MEMORY);
648                 END_PROFILE(SMBtrans);
649                 return;
650         }
651
652         state->cmd = SMBtrans;
653
654         state->mid = req->mid;
655         state->vuid = req->vuid;
656         state->setup_count = CVAL(req->vwv+13, 0);
657         state->setup = NULL;
658         state->total_param = SVAL(req->vwv+0, 0);
659         state->param = NULL;
660         state->total_data = SVAL(req->vwv+1, 0);
661         state->data = NULL;
662         state->max_param_return = SVAL(req->vwv+2, 0);
663         state->max_data_return = SVAL(req->vwv+3, 0);
664         state->max_setup_return = CVAL(req->vwv+4, 0);
665         state->close_on_completion = BITSETW(req->vwv+5, 0);
666         state->one_way = BITSETW(req->vwv+5, 1);
667
668         srvstr_pull_req_talloc(state, req, &state->name, req->buf,
669                                STR_TERMINATE);
670
671         if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
672                         !state->name)
673                 goto bad_param;
674
675         if (state->total_data)  {
676
677                 if (trans_oob(state->total_data, 0, dscnt)
678                     || trans_oob(smb_len(req->inbuf), dsoff, dscnt)) {
679                         goto bad_param;
680                 }
681
682                 /* Can't use talloc here, the core routines do realloc on the
683                  * params and data. Out of paranoia, 100 bytes too many. */
684                 state->data = (char *)SMB_MALLOC(state->total_data+100);
685                 if (state->data == NULL) {
686                         DEBUG(0,("reply_trans: data malloc fail for %u "
687                                  "bytes !\n", (unsigned int)state->total_data));
688                         TALLOC_FREE(state);
689                         reply_nterror(req, NT_STATUS_NO_MEMORY);
690                         END_PROFILE(SMBtrans);
691                         return;
692                 }
693                 /* null-terminate the slack space */
694                 memset(&state->data[state->total_data], 0, 100);
695
696                 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
697         }
698
699         if (state->total_param) {
700
701                 if (trans_oob(state->total_param, 0, pscnt)
702                     || trans_oob(smb_len(req->inbuf), psoff, pscnt)) {
703                         goto bad_param;
704                 }
705
706                 /* Can't use talloc here, the core routines do realloc on the
707                  * params and data. Out of paranoia, 100 bytes too many */
708                 state->param = (char *)SMB_MALLOC(state->total_param+100);
709                 if (state->param == NULL) {
710                         DEBUG(0,("reply_trans: param malloc fail for %u "
711                                  "bytes !\n", (unsigned int)state->total_param));
712                         SAFE_FREE(state->data);
713                         TALLOC_FREE(state);
714                         reply_nterror(req, NT_STATUS_NO_MEMORY);
715                         END_PROFILE(SMBtrans);
716                         return;
717                 } 
718                 /* null-terminate the slack space */
719                 memset(&state->param[state->total_param], 0, 100);
720
721                 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
722         }
723
724         state->received_data  = dscnt;
725         state->received_param = pscnt;
726
727         if (state->setup_count) {
728                 unsigned int i;
729
730                 /*
731                  * No overflow possible here, state->setup_count is an
732                  * unsigned int, being filled by a single byte from
733                  * CVAL(req->vwv+13, 0) above. The cast in the comparison
734                  * below is not necessary, it's here to clarify things. The
735                  * validity of req->vwv and req->wct has been checked in
736                  * init_smb_request already.
737                  */
738                 if (state->setup_count + 14 > (unsigned int)req->wct) {
739                         goto bad_param;
740                 }
741
742                 if((state->setup = TALLOC_ARRAY(
743                             state, uint16, state->setup_count)) == NULL) {
744                         DEBUG(0,("reply_trans: setup malloc fail for %u "
745                                  "bytes !\n", (unsigned int)
746                                  (state->setup_count * sizeof(uint16))));
747                         SAFE_FREE(state->data);
748                         SAFE_FREE(state->param);
749                         TALLOC_FREE(state);
750                         reply_nterror(req, NT_STATUS_NO_MEMORY);
751                         END_PROFILE(SMBtrans);
752                         return;
753                 } 
754
755                 for (i=0;i<state->setup_count;i++) {
756                         state->setup[i] = SVAL(req->vwv + 14 + i, 0);
757                 }
758         }
759
760         state->received_param = pscnt;
761
762         if ((state->received_param != state->total_param) ||
763             (state->received_data != state->total_data)) {
764                 DLIST_ADD(conn->pending_trans, state);
765
766                 /* We need to send an interim response then receive the rest
767                    of the parameter/data bytes */
768                 reply_outbuf(req, 0, 0);
769                 show_msg((char *)req->outbuf);
770                 END_PROFILE(SMBtrans);
771                 return;
772         }
773
774         talloc_steal(talloc_tos(), state);
775
776         handle_trans(conn, req, state);
777
778         SAFE_FREE(state->data);
779         SAFE_FREE(state->param);
780         TALLOC_FREE(state);
781
782         END_PROFILE(SMBtrans);
783         return;
784
785   bad_param:
786
787         DEBUG(0,("reply_trans: invalid trans parameters\n"));
788         SAFE_FREE(state->data);
789         SAFE_FREE(state->param);
790         TALLOC_FREE(state);
791         END_PROFILE(SMBtrans);
792         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
793         return;
794 }
795
796 /****************************************************************************
797  Reply to a secondary SMBtrans.
798  ****************************************************************************/
799
800 void reply_transs(struct smb_request *req)
801 {
802         connection_struct *conn = req->conn;
803         unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
804         struct trans_state *state;
805
806         START_PROFILE(SMBtranss);
807
808         show_msg((char *)req->inbuf);
809
810         if (req->wct < 8) {
811                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
812                 END_PROFILE(SMBtranss);
813                 return;
814         }
815
816         for (state = conn->pending_trans; state != NULL;
817              state = state->next) {
818                 if (state->mid == req->mid) {
819                         break;
820                 }
821         }
822
823         if ((state == NULL) || (state->cmd != SMBtrans)) {
824                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
825                 END_PROFILE(SMBtranss);
826                 return;
827         }
828
829         /* Revise total_params and total_data in case they have changed
830          * downwards */
831
832         if (SVAL(req->vwv+0, 0) < state->total_param)
833                 state->total_param = SVAL(req->vwv+0, 0);
834         if (SVAL(req->vwv+1, 0) < state->total_data)
835                 state->total_data = SVAL(req->vwv+1, 0);
836
837         pcnt = SVAL(req->vwv+2, 0);
838         poff = SVAL(req->vwv+3, 0);
839         pdisp = SVAL(req->vwv+4, 0);
840
841         dcnt = SVAL(req->vwv+5, 0);
842         doff = SVAL(req->vwv+6, 0);
843         ddisp = SVAL(req->vwv+7, 0);
844
845         state->received_param += pcnt;
846         state->received_data += dcnt;
847
848         if ((state->received_data > state->total_data) ||
849             (state->received_param > state->total_param))
850                 goto bad_param;
851
852         if (pcnt) {
853                 if (trans_oob(state->total_param, pdisp, pcnt)
854                     || trans_oob(smb_len(req->inbuf), poff, pcnt)) {
855                         goto bad_param;
856                 }
857                 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,pcnt);
858         }
859
860         if (dcnt) {
861                 if (trans_oob(state->total_data, ddisp, dcnt)
862                     || trans_oob(smb_len(req->inbuf), doff, dcnt)) {
863                         goto bad_param;
864                 }
865                 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,dcnt);
866         }
867
868         if ((state->received_param < state->total_param) ||
869             (state->received_data < state->total_data)) {
870                 END_PROFILE(SMBtranss);
871                 return;
872         }
873
874         talloc_steal(talloc_tos(), state);
875
876         handle_trans(conn, req, state);
877
878         DLIST_REMOVE(conn->pending_trans, state);
879         SAFE_FREE(state->data);
880         SAFE_FREE(state->param);
881         TALLOC_FREE(state);
882
883         END_PROFILE(SMBtranss);
884         return;
885
886   bad_param:
887
888         DEBUG(0,("reply_transs: invalid trans parameters\n"));
889         DLIST_REMOVE(conn->pending_trans, state);
890         SAFE_FREE(state->data);
891         SAFE_FREE(state->param);
892         TALLOC_FREE(state);
893         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
894         END_PROFILE(SMBtranss);
895         return;
896 }