source/smbd/ipc.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Inter-process communication and named pipe handling
   4    Copyright (C) Andrew Tridgell 1992-1998
   5
   6    SMB Version handling
   7    Copyright (C) John H Terpstra 1995-1998
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 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
  29 extern int max_send;
  30
  31 #define NERR_notsupported 50
  32
  33 static void api_no_reply(connection_struct *conn, struct smb_request *req);
  34
  35 /*******************************************************************
  36  copies parameters and data, as needed, into the smb buffer
  37
  38  *both* the data and params sections should be aligned.  this
  39  is fudged in the rpc pipes by
  40  at present, only the data section is.  this may be a possible
  41  cause of some of the ipc problems being experienced.  lkcl26dec97
  42
  43  ******************************************************************/
  44
  45 static void copy_trans_params_and_data(char *outbuf, int align,
  46                                 char *rparam, int param_offset, int param_len,
  47                                 char *rdata, int data_offset, int data_len)
  48 {
  49         char *copy_into = smb_buf(outbuf);
  50
  51         if(param_len < 0)
  52                 param_len = 0;
  53
  54         if(data_len < 0)
  55                 data_len = 0;
  56
  57         DEBUG(5,("copy_trans_params_and_data: params[%d..%d] data[%d..%d] (align %d)\n",
  58                         param_offset, param_offset + param_len,
  59                         data_offset , data_offset  + data_len,
  60                         align));
  61
  62         *copy_into = '\0';
  63
  64         copy_into += 1;
  65
  66         if (param_len)
  67                 memcpy(copy_into, &rparam[param_offset], param_len);
  68
  69         copy_into += param_len;
  70         if (align) {
  71                 memset(copy_into, '\0', align);
  72         }
  73
  74         copy_into += align;
  75
  76         if (data_len )
  77                 memcpy(copy_into, &rdata[data_offset], data_len);
  78 }
  79
  80 /****************************************************************************
  81  Send a trans reply.
  82  ****************************************************************************/
  83
  84 void send_trans_reply(connection_struct *conn,
  85                         struct smb_request *req,
  86                       char *rparam, int rparam_len,
  87                       char *rdata, int rdata_len,
  88                       bool buffer_too_large)
  89 {
  90         int this_ldata,this_lparam;
  91         int tot_data_sent = 0;
  92         int tot_param_sent = 0;
  93         int align;
  94
  95         int ldata  = rdata  ? rdata_len : 0;
  96         int lparam = rparam ? rparam_len : 0;
  97
  98         if (buffer_too_large)
  99                 DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
 100
 101         this_lparam = MIN(lparam,max_send - 500); /* hack */
 102         this_ldata  = MIN(ldata,max_send - (500+this_lparam));
 103
 104         align = ((this_lparam)%4);
 105
 106         reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
 107
 108         copy_trans_params_and_data((char *)req->outbuf, align,
 109                                 rparam, tot_param_sent, this_lparam,
 110                                 rdata, tot_data_sent, this_ldata);
 111
 112         SSVAL(req->outbuf,smb_vwv0,lparam);
 113         SSVAL(req->outbuf,smb_vwv1,ldata);
 114         SSVAL(req->outbuf,smb_vwv3,this_lparam);
 115         SSVAL(req->outbuf,smb_vwv4,smb_offset(smb_buf(req->outbuf)+1,
 116                                               req->outbuf));
 117         SSVAL(req->outbuf,smb_vwv5,0);
 118         SSVAL(req->outbuf,smb_vwv6,this_ldata);
 119         SSVAL(req->outbuf,smb_vwv7,smb_offset(smb_buf(req->outbuf)+1+
 120                                               this_lparam+align,
 121                                               req->outbuf));
 122         SSVAL(req->outbuf,smb_vwv8,0);
 123         SSVAL(req->outbuf,smb_vwv9,0);
 124
 125         if (buffer_too_large) {
 126                 error_packet_set((char *)req->outbuf,
 127                                  ERRDOS, ERRmoredata,
 128                                  STATUS_BUFFER_OVERFLOW,
 129                                  __LINE__, __FILE__);
 130         }
 131
 132         show_msg((char *)req->outbuf);
 133         if (!srv_send_smb(smbd_server_fd(),
 134                         (char *)req->outbuf,
 135                         IS_CONN_ENCRYPTED(conn)))
 136                 exit_server_cleanly("send_trans_reply: srv_send_smb failed.");
 137
 138         TALLOC_FREE(req->outbuf);
 139
 140         tot_data_sent = this_ldata;
 141         tot_param_sent = this_lparam;
 142
 143         while (tot_data_sent < ldata || tot_param_sent < lparam)
 144         {
 145                 this_lparam = MIN(lparam-tot_param_sent, max_send - 500); /* hack */
 146                 this_ldata  = MIN(ldata -tot_data_sent, max_send - (500+this_lparam));
 147
 148                 if(this_lparam < 0)
 149                         this_lparam = 0;
 150
 151                 if(this_ldata < 0)
 152                         this_ldata = 0;
 153
 154                 align = (this_lparam%4);
 155
 156                 reply_outbuf(req, 10, 1+this_ldata+this_lparam+align);
 157
 158                 copy_trans_params_and_data((char *)req->outbuf, align,
 159                                            rparam, tot_param_sent, this_lparam,
 160                                            rdata, tot_data_sent, this_ldata);
 161
 162                 SSVAL(req->outbuf,smb_vwv3,this_lparam);
 163                 SSVAL(req->outbuf,smb_vwv4,smb_offset(smb_buf(req->outbuf)+1,
 164                                                       req->outbuf));
 165                 SSVAL(req->outbuf,smb_vwv5,tot_param_sent);
 166                 SSVAL(req->outbuf,smb_vwv6,this_ldata);
 167                 SSVAL(req->outbuf,smb_vwv7,smb_offset(smb_buf(req->outbuf)+1+
 168                                                       this_lparam+align,
 169                                                       req->outbuf));
 170                 SSVAL(req->outbuf,smb_vwv8,tot_data_sent);
 171                 SSVAL(req->outbuf,smb_vwv9,0);
 172
 173                 if (buffer_too_large) {
 174                         error_packet_set((char *)req->outbuf,
 175                                          ERRDOS, ERRmoredata,
 176                                          STATUS_BUFFER_OVERFLOW,
 177                                          __LINE__, __FILE__);
 178                 }
 179
 180                 show_msg((char *)req->outbuf);
 181                 if (!srv_send_smb(smbd_server_fd(),
 182                                 (char *)req->outbuf,
 183                                 IS_CONN_ENCRYPTED(conn)))
 184                         exit_server_cleanly("send_trans_reply: srv_send_smb failed.");
 185
 186                 tot_data_sent  += this_ldata;
 187                 tot_param_sent += this_lparam;
 188                 TALLOC_FREE(req->outbuf);
 189         }
 190 }
 191
 192 /****************************************************************************
 193  Start the first part of an RPC reply which began with an SMBtrans request.
 194 ****************************************************************************/
 195
 196 static void api_rpc_trans_reply(connection_struct *conn, struct smb_request *req, smb_np_struct *p)
 197 {
 198         bool is_data_outstanding;
 199         char *rdata = (char *)SMB_MALLOC(p->max_trans_reply);
 200         int data_len;
 201
 202         if(rdata == NULL) {
 203                 DEBUG(0,("api_rpc_trans_reply: malloc fail.\n"));
 204                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 205                 return;
 206         }
 207
 208         if((data_len = read_from_pipe( p, rdata, p->max_trans_reply,
 209                                         &is_data_outstanding)) < 0) {
 210                 SAFE_FREE(rdata);
 211                 api_no_reply(conn,req);
 212                 return;
 213         }
 214
 215         send_trans_reply(conn, req, NULL, 0, rdata, data_len, is_data_outstanding);
 216         SAFE_FREE(rdata);
 217         return;
 218 }
 219
 220 /****************************************************************************
 221  WaitNamedPipeHandleState
 222 ****************************************************************************/
 223
 224 static void api_WNPHS(connection_struct *conn, struct smb_request *req, smb_np_struct *p,
 225                       char *param, int param_len)
 226 {
 227         uint16 priority;
 228
 229         if (!param || param_len < 2) {
 230                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 231                 return;
 232         }
 233
 234         priority = SVAL(param,0);
 235         DEBUG(4,("WaitNamedPipeHandleState priority %x\n", priority));
 236
 237         if (wait_rpc_pipe_hnd_state(p, priority)) {
 238                 /* now send the reply */
 239                 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 240                 return;
 241         }
 242         api_no_reply(conn,req);
 243 }
 244
 245
 246 /****************************************************************************
 247  SetNamedPipeHandleState
 248 ****************************************************************************/
 249
 250 static void api_SNPHS(connection_struct *conn, struct smb_request *req, smb_np_struct *p,
 251                       char *param, int param_len)
 252 {
 253         uint16 id;
 254
 255         if (!param || param_len < 2) {
 256                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 257                 return;
 258         }
 259
 260         id = SVAL(param,0);
 261         DEBUG(4,("SetNamedPipeHandleState to code %x\n", id));
 262
 263         if (set_rpc_pipe_hnd_state(p, id)) {
 264                 /* now send the reply */
 265                 send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 266                 return;
 267         }
 268         api_no_reply(conn,req);
 269 }
 270
 271
 272 /****************************************************************************
 273  When no reply is generated, indicate unsupported.
 274  ****************************************************************************/
 275
 276 static void api_no_reply(connection_struct *conn, struct smb_request *req)
 277 {
 278         char rparam[4];
 279
 280         /* unsupported */
 281         SSVAL(rparam,0,NERR_notsupported);
 282         SSVAL(rparam,2,0); /* converter word */
 283
 284         DEBUG(3,("Unsupported API fd command\n"));
 285
 286         /* now send the reply */
 287         send_trans_reply(conn, req, rparam, 4, NULL, 0, False);
 288
 289         return;
 290 }
 291
 292 /****************************************************************************
 293  Handle remote api calls delivered to a named pipe already opened.
 294  ****************************************************************************/
 295
 296 static void api_fd_reply(connection_struct *conn, uint16 vuid,
 297                          struct smb_request *req,
 298                          uint16 *setup, char *data, char *params,
 299                          int suwcnt, int tdscnt, int tpscnt,
 300                          int mdrcnt, int mprcnt)
 301 {
 302         bool reply = False;
 303         smb_np_struct *p = NULL;
 304         int pnum;
 305         int subcommand;
 306
 307         DEBUG(5,("api_fd_reply\n"));
 308
 309         /* First find out the name of this file. */
 310         if (suwcnt != 2) {
 311                 DEBUG(0,("Unexpected named pipe transaction.\n"));
 312                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 313                 return;
 314         }
 315
 316         /* Get the file handle and hence the file name. */
 317         /*
 318          * NB. The setup array has already been transformed
 319          * via SVAL and so is in gost byte order.
 320          */
 321         pnum = ((int)setup[1]) & 0xFFFF;
 322         subcommand = ((int)setup[0]) & 0xFFFF;
 323
 324         if(!(p = get_rpc_pipe(pnum))) {
 325                 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
 326                         /* Win9x does this call with a unicode pipe name, not a pnum. */
 327                         /* Just return success for now... */
 328                         DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
 329                         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 330                         return;
 331                 }
 332
 333                 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
 334                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 335                 return;
 336         }
 337
 338         if (vuid != p->vuid) {
 339                 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
 340                           "expected %d\n", pnum, vuid, p->vuid));
 341                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 342                 return;
 343         }
 344
 345         DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n", subcommand, p->name, pnum));
 346
 347         /* record maximum data length that can be transmitted in an SMBtrans */
 348         p->max_trans_reply = mdrcnt;
 349
 350         DEBUG(10,("api_fd_reply: p:%p max_trans_reply: %d\n", p, p->max_trans_reply));
 351
 352         switch (subcommand) {
 353         case TRANSACT_DCERPCCMD:
 354                 /* dce/rpc command */
 355                 reply = write_to_pipe(p, data, tdscnt);
 356                 if (!reply) {
 357                         api_no_reply(conn, req);
 358                         return;
 359                 }
 360                 api_rpc_trans_reply(conn, req, p);
 361                 break;
 362         case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
 363                 /* Wait Named Pipe Handle state */
 364                 api_WNPHS(conn, req, p, params, tpscnt);
 365                 break;
 366         case TRANSACT_SETNAMEDPIPEHANDLESTATE:
 367                 /* Set Named Pipe Handle state */
 368                 api_SNPHS(conn, req, p, params, tpscnt);
 369                 break;
 370         default:
 371                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 372                 return;
 373         }
 374 }
 375
 376 /****************************************************************************
 377  Handle named pipe commands.
 378 ****************************************************************************/
 379
 380 static void named_pipe(connection_struct *conn, uint16 vuid,
 381                        struct smb_request *req,
 382                        const char *name, uint16 *setup,
 383                        char *data, char *params,
 384                        int suwcnt, int tdscnt,int tpscnt,
 385                        int msrcnt, int mdrcnt, int mprcnt)
 386 {
 387         DEBUG(3,("named pipe command on <%s> name\n", name));
 388
 389         if (strequal(name,"LANMAN")) {
 390                 api_reply(conn, vuid, req,
 391                           data, params,
 392                           tdscnt, tpscnt,
 393                           mdrcnt, mprcnt);
 394                 return;
 395         }
 396
 397         if (strequal(name,"WKSSVC") ||
 398             strequal(name,"SRVSVC") ||
 399             strequal(name,"WINREG") ||
 400             strequal(name,"SAMR") ||
 401             strequal(name,"LSARPC")) {
 402
 403                 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
 404
 405                 api_fd_reply(conn, vuid, req,
 406                              setup, data, params,
 407                              suwcnt, tdscnt, tpscnt,
 408                              mdrcnt, mprcnt);
 409                 return;
 410         }
 411
 412         if (strlen(name) < 1) {
 413                 api_fd_reply(conn, vuid, req,
 414                              setup, data,
 415                              params, suwcnt, tdscnt,
 416                              tpscnt, mdrcnt, mprcnt);
 417                 return;
 418         }
 419
 420         if (setup)
 421                 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
 422                          (int)setup[0],(int)setup[1]));
 423
 424         reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 425         return;
 426 }
 427
 428 static void handle_trans(connection_struct *conn, struct smb_request *req,
 429                          struct trans_state *state)
 430 {
 431         char *local_machine_name;
 432         int name_offset = 0;
 433
 434         DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
 435                  state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
 436                  (unsigned int)state->setup_count));
 437
 438         /*
 439          * WinCE wierdness....
 440          */
 441
 442         local_machine_name = talloc_asprintf(state, "\\%s\\",
 443                                              get_local_machine_name());
 444
 445         if (local_machine_name == NULL) {
 446                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 447                 return;
 448         }
 449
 450         if (strnequal(state->name, local_machine_name,
 451                       strlen(local_machine_name))) {
 452                 name_offset = strlen(local_machine_name)-1;
 453         }
 454
 455         if (!strnequal(&state->name[name_offset], "\\PIPE",
 456                        strlen("\\PIPE"))) {
 457                 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 458                 return;
 459         }
 460
 461         name_offset += strlen("\\PIPE");
 462
 463         /* Win9x weirdness.  When talking to a unicode server Win9x
 464            only sends \PIPE instead of \PIPE\ */
 465
 466         if (state->name[name_offset] == '\\')
 467                 name_offset++;
 468
 469         DEBUG(5,("calling named_pipe\n"));
 470         named_pipe(conn, state->vuid, req,
 471                    state->name+name_offset,
 472                    state->setup,state->data,
 473                    state->param,
 474                    state->setup_count,state->total_data,
 475                    state->total_param,
 476                    state->max_setup_return,
 477                    state->max_data_return,
 478                    state->max_param_return);
 479
 480         if (state->close_on_completion) {
 481                 close_cnum(conn,state->vuid);
 482                 req->conn = NULL;
 483         }
 484
 485         return;
 486 }
 487
 488 /****************************************************************************
 489  Reply to a SMBtrans.
 490  ****************************************************************************/
 491
 492 void reply_trans(struct smb_request *req)
 493 {
 494         connection_struct *conn = req->conn;
 495         unsigned int dsoff;
 496         unsigned int dscnt;
 497         unsigned int psoff;
 498         unsigned int pscnt;
 499         struct trans_state *state;
 500         NTSTATUS result;
 501         unsigned int size;
 502         unsigned int av_size;
 503
 504         START_PROFILE(SMBtrans);
 505
 506         if (req->wct < 14) {
 507                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 508                 END_PROFILE(SMBtrans);
 509                 return;
 510         }
 511
 512         size = smb_len(req->inbuf) + 4;
 513         av_size = smb_len(req->inbuf);
 514         dsoff = SVAL(req->inbuf, smb_dsoff);
 515         dscnt = SVAL(req->inbuf, smb_dscnt);
 516         psoff = SVAL(req->inbuf, smb_psoff);
 517         pscnt = SVAL(req->inbuf, smb_pscnt);
 518
 519         result = allow_new_trans(conn->pending_trans, req->mid);
 520         if (!NT_STATUS_IS_OK(result)) {
 521                 DEBUG(2, ("Got invalid trans request: %s\n",
 522                           nt_errstr(result)));
 523                 reply_nterror(req, result);
 524                 END_PROFILE(SMBtrans);
 525                 return;
 526         }
 527
 528         if ((state = TALLOC_P(conn->mem_ctx, struct trans_state)) == NULL) {
 529                 DEBUG(0, ("talloc failed\n"));
 530                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 531                 END_PROFILE(SMBtrans);
 532                 return;
 533         }
 534
 535         state->cmd = SMBtrans;
 536
 537         state->mid = req->mid;
 538         state->vuid = req->vuid;
 539         state->setup_count = CVAL(req->inbuf, smb_suwcnt);
 540         state->setup = NULL;
 541         state->total_param = SVAL(req->inbuf, smb_tpscnt);
 542         state->param = NULL;
 543         state->total_data = SVAL(req->inbuf, smb_tdscnt);
 544         state->data = NULL;
 545         state->max_param_return = SVAL(req->inbuf, smb_mprcnt);
 546         state->max_data_return = SVAL(req->inbuf, smb_mdrcnt);
 547         state->max_setup_return = CVAL(req->inbuf, smb_msrcnt);
 548         state->close_on_completion = BITSETW(req->inbuf+smb_vwv5,0);
 549         state->one_way = BITSETW(req->inbuf+smb_vwv5,1);
 550
 551         srvstr_pull_buf_talloc(state, req->inbuf, req->flags2, &state->name,
 552                         smb_buf(req->inbuf), STR_TERMINATE);
 553
 554         if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
 555                         !state->name)
 556                 goto bad_param;
 557
 558         if (state->total_data)  {
 559                 /* Can't use talloc here, the core routines do realloc on the
 560                  * params and data. Out of paranoia, 100 bytes too many. */
 561                 state->data = (char *)SMB_MALLOC(state->total_data+100);
 562                 if (state->data == NULL) {
 563                         DEBUG(0,("reply_trans: data malloc fail for %u "
 564                                  "bytes !\n", (unsigned int)state->total_data));
 565                         TALLOC_FREE(state);
 566                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 567                         END_PROFILE(SMBtrans);
 568                         return;
 569                 }
 570                 /* null-terminate the slack space */
 571                 memset(&state->data[state->total_data], 0, 100);
 572
 573                 if (dscnt > state->total_data ||
 574                                 dsoff+dscnt < dsoff) {
 575                         goto bad_param;
 576                 }
 577
 578                 if (dsoff > av_size ||
 579                                 dscnt > av_size ||
 580                                 dsoff+dscnt > av_size) {
 581                         goto bad_param;
 582                 }
 583
 584                 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
 585         }
 586
 587         if (state->total_param) {
 588                 /* Can't use talloc here, the core routines do realloc on the
 589                  * params and data. Out of paranoia, 100 bytes too many */
 590                 state->param = (char *)SMB_MALLOC(state->total_param+100);
 591                 if (state->param == NULL) {
 592                         DEBUG(0,("reply_trans: param malloc fail for %u "
 593                                  "bytes !\n", (unsigned int)state->total_param));
 594                         SAFE_FREE(state->data);
 595                         TALLOC_FREE(state);
 596                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 597                         END_PROFILE(SMBtrans);
 598                         return;
 599                 }
 600                 /* null-terminate the slack space */
 601                 memset(&state->param[state->total_param], 0, 100);
 602
 603                 if (pscnt > state->total_param ||
 604                                 psoff+pscnt < psoff) {
 605                         goto bad_param;
 606                 }
 607
 608                 if (psoff > av_size ||
 609                                 pscnt > av_size ||
 610                                 psoff+pscnt > av_size) {
 611                         goto bad_param;
 612                 }
 613
 614                 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
 615         }
 616
 617         state->received_data  = dscnt;
 618         state->received_param = pscnt;
 619
 620         if (state->setup_count) {
 621                 unsigned int i;
 622                 if((state->setup = TALLOC_ARRAY(
 623                             state, uint16, state->setup_count)) == NULL) {
 624                         DEBUG(0,("reply_trans: setup malloc fail for %u "
 625                                  "bytes !\n", (unsigned int)
 626                                  (state->setup_count * sizeof(uint16))));
 627                         SAFE_FREE(state->data);
 628                         SAFE_FREE(state->param);
 629                         TALLOC_FREE(state);
 630                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 631                         END_PROFILE(SMBtrans);
 632                         return;
 633                 }
 634                 if (req->inbuf+smb_vwv14+(state->setup_count*SIZEOFWORD) >
 635                     req->inbuf + size)
 636                         goto bad_param;
 637                 if ((smb_vwv14+(state->setup_count*SIZEOFWORD) < smb_vwv14) ||
 638                     (smb_vwv14+(state->setup_count*SIZEOFWORD) <
 639                      (state->setup_count*SIZEOFWORD)))
 640                         goto bad_param;
 641
 642                 for (i=0;i<state->setup_count;i++)
 643                         state->setup[i] = SVAL(req->inbuf,
 644                                                smb_vwv14+i*SIZEOFWORD);
 645         }
 646
 647         state->received_param = pscnt;
 648
 649         if ((state->received_param != state->total_param) ||
 650             (state->received_data != state->total_data)) {
 651                 DLIST_ADD(conn->pending_trans, state);
 652
 653                 /* We need to send an interim response then receive the rest
 654                    of the parameter/data bytes */
 655                 reply_outbuf(req, 0, 0);
 656                 show_msg((char *)req->outbuf);
 657                 END_PROFILE(SMBtrans);
 658                 return;
 659         }
 660
 661         handle_trans(conn, req, state);
 662
 663         SAFE_FREE(state->data);
 664         SAFE_FREE(state->param);
 665         TALLOC_FREE(state);
 666
 667         END_PROFILE(SMBtrans);
 668         return;
 669
 670   bad_param:
 671
 672         DEBUG(0,("reply_trans: invalid trans parameters\n"));
 673         SAFE_FREE(state->data);
 674         SAFE_FREE(state->param);
 675         TALLOC_FREE(state);
 676         END_PROFILE(SMBtrans);
 677         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 678         return;
 679 }
 680
 681 /****************************************************************************
 682  Reply to a secondary SMBtrans.
 683  ****************************************************************************/
 684
 685 void reply_transs(struct smb_request *req)
 686 {
 687         connection_struct *conn = req->conn;
 688         unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
 689         struct trans_state *state;
 690         unsigned int av_size;
 691
 692         START_PROFILE(SMBtranss);
 693
 694         show_msg((char *)req->inbuf);
 695
 696         if (req->wct < 8) {
 697                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 698                 END_PROFILE(SMBtranss);
 699                 return;
 700         }
 701
 702         for (state = conn->pending_trans; state != NULL;
 703              state = state->next) {
 704                 if (state->mid == req->mid) {
 705                         break;
 706                 }
 707         }
 708
 709         if ((state == NULL) || (state->cmd != SMBtrans)) {
 710                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 711                 END_PROFILE(SMBtranss);
 712                 return;
 713         }
 714
 715         /* Revise total_params and total_data in case they have changed
 716          * downwards */
 717
 718         if (SVAL(req->inbuf, smb_vwv0) < state->total_param)
 719                 state->total_param = SVAL(req->inbuf,smb_vwv0);
 720         if (SVAL(req->inbuf, smb_vwv1) < state->total_data)
 721                 state->total_data = SVAL(req->inbuf,smb_vwv1);
 722
 723         av_size = smb_len(req->inbuf);
 724
 725         pcnt = SVAL(req->inbuf, smb_spscnt);
 726         poff = SVAL(req->inbuf, smb_spsoff);
 727         pdisp = SVAL(req->inbuf, smb_spsdisp);
 728
 729         dcnt = SVAL(req->inbuf, smb_sdscnt);
 730         doff = SVAL(req->inbuf, smb_sdsoff);
 731         ddisp = SVAL(req->inbuf, smb_sdsdisp);
 732
 733         state->received_param += pcnt;
 734         state->received_data += dcnt;
 735
 736         if ((state->received_data > state->total_data) ||
 737             (state->received_param > state->total_param))
 738                 goto bad_param;
 739
 740         if (pcnt) {
 741                 if (pdisp > state->total_param ||
 742                                 pcnt > state->total_param ||
 743                                 pdisp+pcnt > state->total_param ||
 744                                 pdisp+pcnt < pdisp) {
 745                         goto bad_param;
 746                 }
 747
 748                 if (poff > av_size ||
 749                                 pcnt > av_size ||
 750                                 poff+pcnt > av_size ||
 751                                 poff+pcnt < poff) {
 752                         goto bad_param;
 753                 }
 754
 755                 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,
 756                        pcnt);
 757         }
 758
 759         if (dcnt) {
 760                 if (ddisp > state->total_data ||
 761                                 dcnt > state->total_data ||
 762                                 ddisp+dcnt > state->total_data ||
 763                                 ddisp+dcnt < ddisp) {
 764                         goto bad_param;
 765                 }
 766
 767                 if (ddisp > av_size ||
 768                                 dcnt > av_size ||
 769                                 ddisp+dcnt > av_size ||
 770                                 ddisp+dcnt < ddisp) {
 771                         goto bad_param;
 772                 }
 773
 774                 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,
 775                        dcnt);
 776         }
 777
 778         if ((state->received_param < state->total_param) ||
 779             (state->received_data < state->total_data)) {
 780                 END_PROFILE(SMBtranss);
 781                 return;
 782         }
 783
 784         /*
 785          * construct_reply_common will copy smb_com from inbuf to
 786          * outbuf. SMBtranss is wrong here.
 787          */
 788         SCVAL(req->inbuf,smb_com,SMBtrans);
 789
 790         handle_trans(conn, req, state);
 791
 792         DLIST_REMOVE(conn->pending_trans, state);
 793         SAFE_FREE(state->data);
 794         SAFE_FREE(state->param);
 795         TALLOC_FREE(state);
 796
 797         END_PROFILE(SMBtranss);
 798         return;
 799
 800   bad_param:
 801
 802         DEBUG(0,("reply_transs: invalid trans parameters\n"));
 803         DLIST_REMOVE(conn->pending_trans, state);
 804         SAFE_FREE(state->data);
 805         SAFE_FREE(state->param);
 806         TALLOC_FREE(state);
 807         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 808         END_PROFILE(SMBtranss);
 809         return;
 810 }