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 = smbd_server_conn;
  97         int max_send = sconn->smb1.sessions.max_send;
  98
  99         if (buffer_too_large)
 100                 DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
 101
 102         this_lparam = MIN(lparam,max_send - 500); /* hack */
 103         this_ldata  = MIN(ldata,max_send - (500+this_lparam));
 104
 105         align = ((this_lparam)%4);
 106
 107         reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
 108
 109         /*
 110          * We might have SMBtranss in req which was transferred to the outbuf,
 111          * fix that.
 112          */
 113         SCVAL(req->outbuf, smb_com, SMBtrans);
 114
 115         copy_trans_params_and_data((char *)req->outbuf, align,
 116                                 rparam, tot_param_sent, this_lparam,
 117                                 rdata, tot_data_sent, this_ldata);
 118
 119         SSVAL(req->outbuf,smb_vwv0,lparam);
 120         SSVAL(req->outbuf,smb_vwv1,ldata);
 121         SSVAL(req->outbuf,smb_vwv3,this_lparam);
 122         SSVAL(req->outbuf,smb_vwv4,
 123               smb_offset(smb_buf(req->outbuf)+1, req->outbuf));
 124         SSVAL(req->outbuf,smb_vwv5,0);
 125         SSVAL(req->outbuf,smb_vwv6,this_ldata);
 126         SSVAL(req->outbuf,smb_vwv7,
 127               smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
 128                          req->outbuf));
 129         SSVAL(req->outbuf,smb_vwv8,0);
 130         SSVAL(req->outbuf,smb_vwv9,0);
 131
 132         if (buffer_too_large) {
 133                 error_packet_set((char *)req->outbuf, ERRDOS, ERRmoredata,
 134                                  STATUS_BUFFER_OVERFLOW, __LINE__, __FILE__);
 135         }
 136
 137         show_msg((char *)req->outbuf);
 138         if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
 139                           true, req->seqnum+1,
 140                           IS_CONN_ENCRYPTED(conn), &req->pcd)) {
 141                 exit_server_cleanly("send_trans_reply: srv_send_smb failed.");
 142         }
 143
 144         TALLOC_FREE(req->outbuf);
 145
 146         tot_data_sent = this_ldata;
 147         tot_param_sent = this_lparam;
 148
 149         while (tot_data_sent < ldata || tot_param_sent < lparam)
 150         {
 151                 this_lparam = MIN(lparam-tot_param_sent,
 152                                   max_send - 500); /* hack */
 153                 this_ldata  = MIN(ldata -tot_data_sent,
 154                                   max_send - (500+this_lparam));
 155
 156                 if(this_lparam < 0)
 157                         this_lparam = 0;
 158
 159                 if(this_ldata < 0)
 160                         this_ldata = 0;
 161
 162                 align = (this_lparam%4);
 163
 164                 reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
 165
 166                 /*
 167                  * We might have SMBtranss in req which was transferred to the
 168                  * outbuf, fix that.
 169                  */
 170                 SCVAL(req->outbuf, smb_com, SMBtrans);
 171
 172                 copy_trans_params_and_data((char *)req->outbuf, align,
 173                                            rparam, tot_param_sent, this_lparam,
 174                                            rdata, tot_data_sent, this_ldata);
 175
 176                 SSVAL(req->outbuf,smb_vwv0,lparam);
 177                 SSVAL(req->outbuf,smb_vwv1,ldata);
 178
 179                 SSVAL(req->outbuf,smb_vwv3,this_lparam);
 180                 SSVAL(req->outbuf,smb_vwv4,
 181                       smb_offset(smb_buf(req->outbuf)+1,req->outbuf));
 182                 SSVAL(req->outbuf,smb_vwv5,tot_param_sent);
 183                 SSVAL(req->outbuf,smb_vwv6,this_ldata);
 184                 SSVAL(req->outbuf,smb_vwv7,
 185                       smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
 186                                  req->outbuf));
 187                 SSVAL(req->outbuf,smb_vwv8,tot_data_sent);
 188                 SSVAL(req->outbuf,smb_vwv9,0);
 189
 190                 if (buffer_too_large) {
 191                         error_packet_set((char *)req->outbuf,
 192                                          ERRDOS, ERRmoredata,
 193                                          STATUS_BUFFER_OVERFLOW,
 194                                          __LINE__, __FILE__);
 195                 }
 196
 197                 show_msg((char *)req->outbuf);
 198                 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
 199                                   true, req->seqnum+1,
 200                                   IS_CONN_ENCRYPTED(conn), &req->pcd))
 201                         exit_server_cleanly("send_trans_reply: srv_send_smb "
 202                                             "failed.");
 203
 204                 tot_data_sent  += this_ldata;
 205                 tot_param_sent += this_lparam;
 206                 TALLOC_FREE(req->outbuf);
 207         }
 208 }
 209
 210 /****************************************************************************
 211  Start the first part of an RPC reply which began with an SMBtrans request.
 212 ****************************************************************************/
 213
 214 struct dcerpc_cmd_state {
 215         struct fake_file_handle *handle;
 216         uint8_t *data;
 217         size_t num_data;
 218         size_t max_read;
 219 };
 220
 221 static void api_dcerpc_cmd_write_done(struct tevent_req *subreq);
 222 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq);
 223
 224 static void api_dcerpc_cmd(connection_struct *conn, struct smb_request *req,
 225                            files_struct *fsp, uint8_t *data, size_t length,
 226                            size_t max_read)
 227 {
 228         struct tevent_req *subreq;
 229         struct dcerpc_cmd_state *state;
 230
 231         if (!fsp_is_np(fsp)) {
 232                 api_no_reply(conn, req);
 233                 return;
 234         }
 235
 236         state = talloc(req, struct dcerpc_cmd_state);
 237         if (state == NULL) {
 238                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 239                 return;
 240         }
 241         req->async_priv = state;
 242
 243         state->handle = fsp->fake_file_handle;
 244
 245         /*
 246          * This memdup severely sucks. But doing it properly essentially means
 247          * to rewrite lanman.c, something which I don't really want to do now.
 248          */
 249         state->data = (uint8_t *)talloc_memdup(state, data, length);
 250         if (state->data == NULL) {
 251                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 252                 return;
 253         }
 254         state->num_data = length;
 255         state->max_read = max_read;
 256
 257         subreq = np_write_send(state, smbd_event_context(), state->handle,
 258                                state->data, length);
 259         if (subreq == NULL) {
 260                 TALLOC_FREE(state);
 261                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 262                 return;
 263         }
 264         tevent_req_set_callback(subreq, api_dcerpc_cmd_write_done,
 265                                 talloc_move(conn, &req));
 266 }
 267
 268 static void api_dcerpc_cmd_write_done(struct tevent_req *subreq)
 269 {
 270         struct smb_request *req = tevent_req_callback_data(
 271                 subreq, struct smb_request);
 272         struct dcerpc_cmd_state *state = talloc_get_type_abort(
 273                 req->async_priv, struct dcerpc_cmd_state);
 274         NTSTATUS status;
 275         ssize_t nwritten = -1;
 276
 277         status = np_write_recv(subreq, &nwritten);
 278         TALLOC_FREE(subreq);
 279         if (!NT_STATUS_IS_OK(status) || (nwritten != state->num_data)) {
 280                 DEBUG(10, ("Could not write to pipe: %s (%d/%d)\n",
 281                            nt_errstr(status), (int)state->num_data,
 282                            (int)nwritten));
 283                 reply_nterror(req, NT_STATUS_PIPE_NOT_AVAILABLE);
 284                 goto send;
 285         }
 286
 287         state->data = TALLOC_REALLOC_ARRAY(state, state->data, uint8_t,
 288                                            state->max_read);
 289         if (state->data == NULL) {
 290                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 291                 goto send;
 292         }
 293
 294         subreq = np_read_send(req->conn, smbd_event_context(),
 295                               state->handle, state->data, state->max_read);
 296         if (subreq == NULL) {
 297                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 298                 goto send;
 299         }
 300         tevent_req_set_callback(subreq, api_dcerpc_cmd_read_done, req);
 301         return;
 302
 303  send:
 304         if (!srv_send_smb(
 305                     smbd_server_fd(), (char *)req->outbuf,
 306                     true, req->seqnum+1,
 307                     IS_CONN_ENCRYPTED(req->conn) || req->encrypted,
 308                     &req->pcd)) {
 309                 exit_server_cleanly("construct_reply: srv_send_smb failed.");
 310         }
 311         TALLOC_FREE(req);
 312 }
 313
 314 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq)
 315 {
 316         struct smb_request *req = tevent_req_callback_data(
 317                 subreq, struct smb_request);
 318         struct dcerpc_cmd_state *state = talloc_get_type_abort(
 319                 req->async_priv, struct dcerpc_cmd_state);
 320         NTSTATUS status;
 321         ssize_t nread;
 322         bool is_data_outstanding;
 323
 324         status = np_read_recv(subreq, &nread, &is_data_outstanding);
 325         TALLOC_FREE(subreq);
 326
 327         if (!NT_STATUS_IS_OK(status)) {
 328                 DEBUG(10, ("Could not read from to pipe: %s\n",
 329                            nt_errstr(status)));
 330                 reply_nterror(req, status);
 331
 332                 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
 333                                   true, req->seqnum+1,
 334                                   IS_CONN_ENCRYPTED(req->conn)
 335                                   ||req->encrypted, &req->pcd)) {
 336                         exit_server_cleanly("construct_reply: srv_send_smb "
 337                                             "failed.");
 338                 }
 339                 TALLOC_FREE(req);
 340                 return;
 341         }
 342
 343         send_trans_reply(req->conn, req, NULL, 0, (char *)state->data, nread,
 344                          is_data_outstanding);
 345         TALLOC_FREE(req);
 346 }
 347
 348 /****************************************************************************
 349  WaitNamedPipeHandleState
 350 ****************************************************************************/
 351
 352 static void api_WNPHS(connection_struct *conn, struct smb_request *req,
 353                       struct files_struct *fsp, char *param, int param_len)
 354 {
 355         if (!param || param_len < 2) {
 356                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 357                 return;
 358         }
 359
 360         DEBUG(4,("WaitNamedPipeHandleState priority %x\n",
 361                  (int)SVAL(param,0)));
 362
 363         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 364 }
 365
 366
 367 /****************************************************************************
 368  SetNamedPipeHandleState
 369 ****************************************************************************/
 370
 371 static void api_SNPHS(connection_struct *conn, struct smb_request *req,
 372                       struct files_struct *fsp, char *param, int param_len)
 373 {
 374         if (!param || param_len < 2) {
 375                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 376                 return;
 377         }
 378
 379         DEBUG(4,("SetNamedPipeHandleState to code %x\n", (int)SVAL(param,0)));
 380
 381         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 382 }
 383
 384
 385 /****************************************************************************
 386  When no reply is generated, indicate unsupported.
 387  ****************************************************************************/
 388
 389 static void api_no_reply(connection_struct *conn, struct smb_request *req)
 390 {
 391         char rparam[4];
 392
 393         /* unsupported */
 394         SSVAL(rparam,0,NERR_notsupported);
 395         SSVAL(rparam,2,0); /* converter word */
 396
 397         DEBUG(3,("Unsupported API fd command\n"));
 398
 399         /* now send the reply */
 400         send_trans_reply(conn, req, rparam, 4, NULL, 0, False);
 401
 402         return;
 403 }
 404
 405 /****************************************************************************
 406  Handle remote api calls delivered to a named pipe already opened.
 407  ****************************************************************************/
 408
 409 static void api_fd_reply(connection_struct *conn, uint16 vuid,
 410                          struct smb_request *req,
 411                          uint16 *setup, uint8_t *data, char *params,
 412                          int suwcnt, int tdscnt, int tpscnt,
 413                          int mdrcnt, int mprcnt)
 414 {
 415         struct files_struct *fsp;
 416         int pnum;
 417         int subcommand;
 418
 419         DEBUG(5,("api_fd_reply\n"));
 420
 421         /* First find out the name of this file. */
 422         if (suwcnt != 2) {
 423                 DEBUG(0,("Unexpected named pipe transaction.\n"));
 424                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 425                 return;
 426         }
 427
 428         /* Get the file handle and hence the file name. */
 429         /*
 430          * NB. The setup array has already been transformed
 431          * via SVAL and so is in host byte order.
 432          */
 433         pnum = ((int)setup[1]) & 0xFFFF;
 434         subcommand = ((int)setup[0]) & 0xFFFF;
 435
 436         fsp = file_fsp(req, pnum);
 437
 438         if (!fsp_is_np(fsp)) {
 439                 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
 440                         /* Win9x does this call with a unicode pipe name, not a pnum. */
 441                         /* Just return success for now... */
 442                         DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
 443                         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 444                         return;
 445                 }
 446
 447                 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
 448                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 449                 return;
 450         }
 451
 452         if (vuid != fsp->vuid) {
 453                 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
 454                           "expected %d\n", pnum, vuid, fsp->vuid));
 455                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 456                 return;
 457         }
 458
 459         DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n",
 460                  subcommand, fsp_str_dbg(fsp), pnum));
 461
 462         DEBUG(10, ("api_fd_reply: p:%p max_trans_reply: %d\n", fsp, mdrcnt));
 463
 464         switch (subcommand) {
 465         case TRANSACT_DCERPCCMD: {
 466                 /* dce/rpc command */
 467                 api_dcerpc_cmd(conn, req, fsp, (uint8_t *)data, tdscnt,
 468                                mdrcnt);
 469                 break;
 470         }
 471         case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
 472                 /* Wait Named Pipe Handle state */
 473                 api_WNPHS(conn, req, fsp, params, tpscnt);
 474                 break;
 475         case TRANSACT_SETNAMEDPIPEHANDLESTATE:
 476                 /* Set Named Pipe Handle state */
 477                 api_SNPHS(conn, req, fsp, params, tpscnt);
 478                 break;
 479         default:
 480                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 481                 return;
 482         }
 483 }
 484
 485 /****************************************************************************
 486  Handle named pipe commands.
 487 ****************************************************************************/
 488
 489 static void named_pipe(connection_struct *conn, uint16 vuid,
 490                        struct smb_request *req,
 491                        const char *name, uint16 *setup,
 492                        char *data, char *params,
 493                        int suwcnt, int tdscnt,int tpscnt,
 494                        int msrcnt, int mdrcnt, int mprcnt)
 495 {
 496         DEBUG(3,("named pipe command on <%s> name\n", name));
 497
 498         if (strequal(name,"LANMAN")) {
 499                 api_reply(conn, vuid, req,
 500                           data, params,
 501                           tdscnt, tpscnt,
 502                           mdrcnt, mprcnt);
 503                 return;
 504         }
 505
 506         if (strequal(name,"WKSSVC") ||
 507             strequal(name,"SRVSVC") ||
 508             strequal(name,"WINREG") ||
 509             strequal(name,"SAMR") ||
 510             strequal(name,"LSARPC")) {
 511
 512                 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
 513
 514                 api_fd_reply(conn, vuid, req,
 515                              setup, (uint8_t *)data, params,
 516                              suwcnt, tdscnt, tpscnt,
 517                              mdrcnt, mprcnt);
 518                 return;
 519         }
 520
 521         if (strlen(name) < 1) {
 522                 api_fd_reply(conn, vuid, req,
 523                              setup, (uint8_t *)data,
 524                              params, suwcnt, tdscnt,
 525                              tpscnt, mdrcnt, mprcnt);
 526                 return;
 527         }
 528
 529         if (setup)
 530                 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
 531                          (int)setup[0],(int)setup[1]));
 532
 533         reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 534         return;
 535 }
 536
 537 static void handle_trans(connection_struct *conn, struct smb_request *req,
 538                          struct trans_state *state)
 539 {
 540         char *local_machine_name;
 541         int name_offset = 0;
 542
 543         DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
 544                  state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
 545                  (unsigned int)state->setup_count));
 546
 547         /*
 548          * WinCE wierdness....
 549          */
 550
 551         local_machine_name = talloc_asprintf(state, "\\%s\\",
 552                                              get_local_machine_name());
 553
 554         if (local_machine_name == NULL) {
 555                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 556                 return;
 557         }
 558
 559         if (strnequal(state->name, local_machine_name,
 560                       strlen(local_machine_name))) {
 561                 name_offset = strlen(local_machine_name)-1;
 562         }
 563
 564         if (!strnequal(&state->name[name_offset], "\\PIPE",
 565                        strlen("\\PIPE"))) {
 566                 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 567                 return;
 568         }
 569
 570         name_offset += strlen("\\PIPE");
 571
 572         /* Win9x weirdness.  When talking to a unicode server Win9x
 573            only sends \PIPE instead of \PIPE\ */
 574
 575         if (state->name[name_offset] == '\\')
 576                 name_offset++;
 577
 578         DEBUG(5,("calling named_pipe\n"));
 579         named_pipe(conn, state->vuid, req,
 580                    state->name+name_offset,
 581                    state->setup,state->data,
 582                    state->param,
 583                    state->setup_count,state->total_data,
 584                    state->total_param,
 585                    state->max_setup_return,
 586                    state->max_data_return,
 587                    state->max_param_return);
 588
 589         if (state->close_on_completion) {
 590                 close_cnum(conn,state->vuid);
 591                 req->conn = NULL;
 592         }
 593
 594         return;
 595 }
 596
 597 /****************************************************************************
 598  Reply to a SMBtrans.
 599  ****************************************************************************/
 600
 601 void reply_trans(struct smb_request *req)
 602 {
 603         connection_struct *conn = req->conn;
 604         unsigned int dsoff;
 605         unsigned int dscnt;
 606         unsigned int psoff;
 607         unsigned int pscnt;
 608         struct trans_state *state;
 609         NTSTATUS result;
 610
 611         START_PROFILE(SMBtrans);
 612
 613         if (req->wct < 14) {
 614                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 615                 END_PROFILE(SMBtrans);
 616                 return;
 617         }
 618
 619         dsoff = SVAL(req->vwv+12, 0);
 620         dscnt = SVAL(req->vwv+11, 0);
 621         psoff = SVAL(req->vwv+10, 0);
 622         pscnt = SVAL(req->vwv+9, 0);
 623
 624         result = allow_new_trans(conn->pending_trans, req->mid);
 625         if (!NT_STATUS_IS_OK(result)) {
 626                 DEBUG(2, ("Got invalid trans request: %s\n",
 627                           nt_errstr(result)));
 628                 reply_nterror(req, result);
 629                 END_PROFILE(SMBtrans);
 630                 return;
 631         }
 632
 633         if ((state = TALLOC_P(conn, struct trans_state)) == NULL) {
 634                 DEBUG(0, ("talloc failed\n"));
 635                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 636                 END_PROFILE(SMBtrans);
 637                 return;
 638         }
 639
 640         state->cmd = SMBtrans;
 641
 642         state->mid = req->mid;
 643         state->vuid = req->vuid;
 644         state->setup_count = CVAL(req->vwv+13, 0);
 645         state->setup = NULL;
 646         state->total_param = SVAL(req->vwv+0, 0);
 647         state->param = NULL;
 648         state->total_data = SVAL(req->vwv+1, 0);
 649         state->data = NULL;
 650         state->max_param_return = SVAL(req->vwv+2, 0);
 651         state->max_data_return = SVAL(req->vwv+3, 0);
 652         state->max_setup_return = CVAL(req->vwv+4, 0);
 653         state->close_on_completion = BITSETW(req->vwv+5, 0);
 654         state->one_way = BITSETW(req->vwv+5, 1);
 655
 656         srvstr_pull_req_talloc(state, req, &state->name, req->buf,
 657                                STR_TERMINATE);
 658
 659         if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
 660                         !state->name)
 661                 goto bad_param;
 662
 663         if (state->total_data)  {
 664
 665                 if (trans_oob(state->total_data, 0, dscnt)
 666                     || trans_oob(smb_len(req->inbuf), dsoff, dscnt)) {
 667                         goto bad_param;
 668                 }
 669
 670                 /* Can't use talloc here, the core routines do realloc on the
 671                  * params and data. Out of paranoia, 100 bytes too many. */
 672                 state->data = (char *)SMB_MALLOC(state->total_data+100);
 673                 if (state->data == NULL) {
 674                         DEBUG(0,("reply_trans: data malloc fail for %u "
 675                                  "bytes !\n", (unsigned int)state->total_data));
 676                         TALLOC_FREE(state);
 677                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 678                         END_PROFILE(SMBtrans);
 679                         return;
 680                 }
 681                 /* null-terminate the slack space */
 682                 memset(&state->data[state->total_data], 0, 100);
 683
 684                 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
 685         }
 686
 687         if (state->total_param) {
 688
 689                 if (trans_oob(state->total_param, 0, pscnt)
 690                     || trans_oob(smb_len(req->inbuf), psoff, pscnt)) {
 691                         goto bad_param;
 692                 }
 693
 694                 /* Can't use talloc here, the core routines do realloc on the
 695                  * params and data. Out of paranoia, 100 bytes too many */
 696                 state->param = (char *)SMB_MALLOC(state->total_param+100);
 697                 if (state->param == NULL) {
 698                         DEBUG(0,("reply_trans: param malloc fail for %u "
 699                                  "bytes !\n", (unsigned int)state->total_param));
 700                         SAFE_FREE(state->data);
 701                         TALLOC_FREE(state);
 702                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 703                         END_PROFILE(SMBtrans);
 704                         return;
 705                 }
 706                 /* null-terminate the slack space */
 707                 memset(&state->param[state->total_param], 0, 100);
 708
 709                 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
 710         }
 711
 712         state->received_data  = dscnt;
 713         state->received_param = pscnt;
 714
 715         if (state->setup_count) {
 716                 unsigned int i;
 717
 718                 /*
 719                  * No overflow possible here, state->setup_count is an
 720                  * unsigned int, being filled by a single byte from
 721                  * CVAL(req->vwv+13, 0) above. The cast in the comparison
 722                  * below is not necessary, it's here to clarify things. The
 723                  * validity of req->vwv and req->wct has been checked in
 724                  * init_smb_request already.
 725                  */
 726                 if (state->setup_count + 14 > (unsigned int)req->wct) {
 727                         goto bad_param;
 728                 }
 729
 730                 if((state->setup = TALLOC_ARRAY(
 731                             state, uint16, state->setup_count)) == NULL) {
 732                         DEBUG(0,("reply_trans: setup malloc fail for %u "
 733                                  "bytes !\n", (unsigned int)
 734                                  (state->setup_count * sizeof(uint16))));
 735                         SAFE_FREE(state->data);
 736                         SAFE_FREE(state->param);
 737                         TALLOC_FREE(state);
 738                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 739                         END_PROFILE(SMBtrans);
 740                         return;
 741                 }
 742
 743                 for (i=0;i<state->setup_count;i++) {
 744                         state->setup[i] = SVAL(req->vwv + 14 + i, 0);
 745                 }
 746         }
 747
 748         state->received_param = pscnt;
 749
 750         if ((state->received_param != state->total_param) ||
 751             (state->received_data != state->total_data)) {
 752                 DLIST_ADD(conn->pending_trans, state);
 753
 754                 /* We need to send an interim response then receive the rest
 755                    of the parameter/data bytes */
 756                 reply_outbuf(req, 0, 0);
 757                 show_msg((char *)req->outbuf);
 758                 END_PROFILE(SMBtrans);
 759                 return;
 760         }
 761
 762         talloc_steal(talloc_tos(), state);
 763
 764         handle_trans(conn, req, state);
 765
 766         SAFE_FREE(state->data);
 767         SAFE_FREE(state->param);
 768         TALLOC_FREE(state);
 769
 770         END_PROFILE(SMBtrans);
 771         return;
 772
 773   bad_param:
 774
 775         DEBUG(0,("reply_trans: invalid trans parameters\n"));
 776         SAFE_FREE(state->data);
 777         SAFE_FREE(state->param);
 778         TALLOC_FREE(state);
 779         END_PROFILE(SMBtrans);
 780         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 781         return;
 782 }
 783
 784 /****************************************************************************
 785  Reply to a secondary SMBtrans.
 786  ****************************************************************************/
 787
 788 void reply_transs(struct smb_request *req)
 789 {
 790         connection_struct *conn = req->conn;
 791         unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
 792         struct trans_state *state;
 793
 794         START_PROFILE(SMBtranss);
 795
 796         show_msg((char *)req->inbuf);
 797
 798         if (req->wct < 8) {
 799                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 800                 END_PROFILE(SMBtranss);
 801                 return;
 802         }
 803
 804         for (state = conn->pending_trans; state != NULL;
 805              state = state->next) {
 806                 if (state->mid == req->mid) {
 807                         break;
 808                 }
 809         }
 810
 811         if ((state == NULL) || (state->cmd != SMBtrans)) {
 812                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 813                 END_PROFILE(SMBtranss);
 814                 return;
 815         }
 816
 817         /* Revise total_params and total_data in case they have changed
 818          * downwards */
 819
 820         if (SVAL(req->vwv+0, 0) < state->total_param)
 821                 state->total_param = SVAL(req->vwv+0, 0);
 822         if (SVAL(req->vwv+1, 0) < state->total_data)
 823                 state->total_data = SVAL(req->vwv+1, 0);
 824
 825         pcnt = SVAL(req->vwv+2, 0);
 826         poff = SVAL(req->vwv+3, 0);
 827         pdisp = SVAL(req->vwv+4, 0);
 828
 829         dcnt = SVAL(req->vwv+5, 0);
 830         doff = SVAL(req->vwv+6, 0);
 831         ddisp = SVAL(req->vwv+7, 0);
 832
 833         state->received_param += pcnt;
 834         state->received_data += dcnt;
 835
 836         if ((state->received_data > state->total_data) ||
 837             (state->received_param > state->total_param))
 838                 goto bad_param;
 839
 840         if (pcnt) {
 841                 if (trans_oob(state->total_param, pdisp, pcnt)
 842                     || trans_oob(smb_len(req->inbuf), poff, pcnt)) {
 843                         goto bad_param;
 844                 }
 845                 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,pcnt);
 846         }
 847
 848         if (dcnt) {
 849                 if (trans_oob(state->total_data, ddisp, dcnt)
 850                     || trans_oob(smb_len(req->inbuf), doff, dcnt)) {
 851                         goto bad_param;
 852                 }
 853                 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,dcnt);
 854         }
 855
 856         if ((state->received_param < state->total_param) ||
 857             (state->received_data < state->total_data)) {
 858                 END_PROFILE(SMBtranss);
 859                 return;
 860         }
 861
 862         talloc_steal(talloc_tos(), state);
 863
 864         handle_trans(conn, req, state);
 865
 866         DLIST_REMOVE(conn->pending_trans, state);
 867         SAFE_FREE(state->data);
 868         SAFE_FREE(state->param);
 869         TALLOC_FREE(state);
 870
 871         END_PROFILE(SMBtranss);
 872         return;
 873
 874   bad_param:
 875
 876         DEBUG(0,("reply_transs: invalid trans parameters\n"));
 877         DLIST_REMOVE(conn->pending_trans, state);
 878         SAFE_FREE(state->data);
 879         SAFE_FREE(state->param);
 880         TALLOC_FREE(state);
 881         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 882         END_PROFILE(SMBtranss);
 883         return;
 884 }