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
  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, const uint8_t *inbuf,
  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         char *outbuf;
  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         if (!create_outbuf(talloc_tos(), (char *)inbuf, &outbuf,
 107                            10, 1+align+this_ldata+this_lparam)) {
 108                 smb_panic("could not allocate outbuf");
 109         }
 110
 111         copy_trans_params_and_data(outbuf, align,
 112                                 rparam, tot_param_sent, this_lparam,
 113                                 rdata, tot_data_sent, this_ldata);
 114
 115         SSVAL(outbuf,smb_vwv0,lparam);
 116         SSVAL(outbuf,smb_vwv1,ldata);
 117         SSVAL(outbuf,smb_vwv3,this_lparam);
 118         SSVAL(outbuf,smb_vwv4,smb_offset(smb_buf(outbuf)+1,outbuf));
 119         SSVAL(outbuf,smb_vwv5,0);
 120         SSVAL(outbuf,smb_vwv6,this_ldata);
 121         SSVAL(outbuf,smb_vwv7,smb_offset(smb_buf(outbuf)+1+this_lparam+align,
 122                                          outbuf));
 123         SSVAL(outbuf,smb_vwv8,0);
 124         SSVAL(outbuf,smb_vwv9,0);
 125
 126         if (buffer_too_large) {
 127                 error_packet_set((char *)outbuf, ERRDOS, ERRmoredata,
 128                                  STATUS_BUFFER_OVERFLOW, __LINE__, __FILE__);
 129         }
 130
 131         show_msg(outbuf);
 132         if (!srv_send_smb(smbd_server_fd(), (char *)outbuf,
 133                           IS_CONN_ENCRYPTED(conn))) {
 134                 exit_server_cleanly("send_trans_reply: srv_send_smb failed.");
 135         }
 136
 137         TALLOC_FREE(outbuf);
 138
 139         tot_data_sent = this_ldata;
 140         tot_param_sent = this_lparam;
 141
 142         while (tot_data_sent < ldata || tot_param_sent < lparam)
 143         {
 144                 this_lparam = MIN(lparam-tot_param_sent,
 145                                   max_send - 500); /* hack */
 146                 this_ldata  = MIN(ldata -tot_data_sent,
 147                                   max_send - (500+this_lparam));
 148
 149                 if(this_lparam < 0)
 150                         this_lparam = 0;
 151
 152                 if(this_ldata < 0)
 153                         this_ldata = 0;
 154
 155                 align = (this_lparam%4);
 156
 157                 if (!create_outbuf(talloc_tos(), (char *)inbuf, &outbuf,
 158                                    10, 1+align+this_ldata+this_lparam)) {
 159                         smb_panic("could not allocate outbuf");
 160                 }
 161
 162                 copy_trans_params_and_data(outbuf, align,
 163                                            rparam, tot_param_sent, this_lparam,
 164                                            rdata, tot_data_sent, this_ldata);
 165
 166                 SSVAL(outbuf,smb_vwv3,this_lparam);
 167                 SSVAL(outbuf,smb_vwv4,smb_offset(smb_buf(outbuf)+1,outbuf));
 168                 SSVAL(outbuf,smb_vwv5,tot_param_sent);
 169                 SSVAL(outbuf,smb_vwv6,this_ldata);
 170                 SSVAL(outbuf,smb_vwv7,
 171                       smb_offset(smb_buf(outbuf)+1+this_lparam+align, outbuf));
 172                 SSVAL(outbuf,smb_vwv8,tot_data_sent);
 173                 SSVAL(outbuf,smb_vwv9,0);
 174
 175                 if (buffer_too_large) {
 176                         error_packet_set(outbuf, ERRDOS, ERRmoredata,
 177                                          STATUS_BUFFER_OVERFLOW,
 178                                          __LINE__, __FILE__);
 179                 }
 180
 181                 show_msg(outbuf);
 182                 if (!srv_send_smb(smbd_server_fd(), outbuf,
 183                                   IS_CONN_ENCRYPTED(conn)))
 184                         exit_server_cleanly("send_trans_reply: srv_send_smb "
 185                                             "failed.");
 186
 187                 tot_data_sent  += this_ldata;
 188                 tot_param_sent += this_lparam;
 189                 TALLOC_FREE(outbuf);
 190         }
 191 }
 192
 193 /****************************************************************************
 194  Start the first part of an RPC reply which began with an SMBtrans request.
 195 ****************************************************************************/
 196
 197 static void api_rpc_trans_reply(connection_struct *conn, struct smb_request *req, smb_np_struct *p)
 198 {
 199         bool is_data_outstanding;
 200         char *rdata = (char *)SMB_MALLOC(p->max_trans_reply);
 201         int data_len;
 202
 203         if(rdata == NULL) {
 204                 DEBUG(0,("api_rpc_trans_reply: malloc fail.\n"));
 205                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 206                 return;
 207         }
 208
 209         if((data_len = read_from_pipe( p, rdata, p->max_trans_reply,
 210                                         &is_data_outstanding)) < 0) {
 211                 SAFE_FREE(rdata);
 212                 api_no_reply(conn,req);
 213                 return;
 214         }
 215
 216         send_trans_reply(conn, req->inbuf, NULL, 0, rdata, data_len,
 217                          is_data_outstanding);
 218         SAFE_FREE(rdata);
 219         return;
 220 }
 221
 222 /****************************************************************************
 223  WaitNamedPipeHandleState
 224 ****************************************************************************/
 225
 226 static void api_WNPHS(connection_struct *conn, struct smb_request *req, smb_np_struct *p,
 227                       char *param, int param_len)
 228 {
 229         uint16 priority;
 230
 231         if (!param || param_len < 2) {
 232                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 233                 return;
 234         }
 235
 236         priority = SVAL(param,0);
 237         DEBUG(4,("WaitNamedPipeHandleState priority %x\n", priority));
 238
 239         if (wait_rpc_pipe_hnd_state(p, priority)) {
 240                 /* now send the reply */
 241                 send_trans_reply(conn, req->inbuf, NULL, 0, NULL, 0, False);
 242                 return;
 243         }
 244         api_no_reply(conn,req);
 245 }
 246
 247
 248 /****************************************************************************
 249  SetNamedPipeHandleState
 250 ****************************************************************************/
 251
 252 static void api_SNPHS(connection_struct *conn, struct smb_request *req, smb_np_struct *p,
 253                       char *param, int param_len)
 254 {
 255         uint16 id;
 256
 257         if (!param || param_len < 2) {
 258                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 259                 return;
 260         }
 261
 262         id = SVAL(param,0);
 263         DEBUG(4,("SetNamedPipeHandleState to code %x\n", id));
 264
 265         if (set_rpc_pipe_hnd_state(p, id)) {
 266                 /* now send the reply */
 267                 send_trans_reply(conn, req->inbuf, NULL, 0, NULL, 0, False);
 268                 return;
 269         }
 270         api_no_reply(conn,req);
 271 }
 272
 273
 274 /****************************************************************************
 275  When no reply is generated, indicate unsupported.
 276  ****************************************************************************/
 277
 278 static void api_no_reply(connection_struct *conn, struct smb_request *req)
 279 {
 280         char rparam[4];
 281
 282         /* unsupported */
 283         SSVAL(rparam,0,NERR_notsupported);
 284         SSVAL(rparam,2,0); /* converter word */
 285
 286         DEBUG(3,("Unsupported API fd command\n"));
 287
 288         /* now send the reply */
 289         send_trans_reply(conn, req->inbuf, rparam, 4, NULL, 0, False);
 290
 291         return;
 292 }
 293
 294 /****************************************************************************
 295  Handle remote api calls delivered to a named pipe already opened.
 296  ****************************************************************************/
 297
 298 static void api_fd_reply(connection_struct *conn, uint16 vuid,
 299                          struct smb_request *req,
 300                          uint16 *setup, char *data, char *params,
 301                          int suwcnt, int tdscnt, int tpscnt,
 302                          int mdrcnt, int mprcnt)
 303 {
 304         bool reply = False;
 305         smb_np_struct *p = NULL;
 306         int pnum;
 307         int subcommand;
 308
 309         DEBUG(5,("api_fd_reply\n"));
 310
 311         /* First find out the name of this file. */
 312         if (suwcnt != 2) {
 313                 DEBUG(0,("Unexpected named pipe transaction.\n"));
 314                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 315                 return;
 316         }
 317
 318         /* Get the file handle and hence the file name. */
 319         /*
 320          * NB. The setup array has already been transformed
 321          * via SVAL and so is in host byte order.
 322          */
 323         pnum = ((int)setup[1]) & 0xFFFF;
 324         subcommand = ((int)setup[0]) & 0xFFFF;
 325
 326         if(!(p = get_rpc_pipe(pnum))) {
 327                 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
 328                         /* Win9x does this call with a unicode pipe name, not a pnum. */
 329                         /* Just return success for now... */
 330                         DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
 331                         send_trans_reply(conn, req->inbuf, NULL, 0, NULL, 0,
 332                                          False);
 333                         return;
 334                 }
 335
 336                 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
 337                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 338                 return;
 339         }
 340
 341         if (vuid != p->vuid) {
 342                 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
 343                           "expected %d\n", pnum, vuid, p->vuid));
 344                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 345                 return;
 346         }
 347
 348         DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n", subcommand, p->name, pnum));
 349
 350         /* record maximum data length that can be transmitted in an SMBtrans */
 351         p->max_trans_reply = mdrcnt;
 352
 353         DEBUG(10,("api_fd_reply: p:%p max_trans_reply: %d\n", p, p->max_trans_reply));
 354
 355         switch (subcommand) {
 356         case TRANSACT_DCERPCCMD:
 357                 /* dce/rpc command */
 358                 reply = write_to_pipe(p, data, tdscnt);
 359                 if (!reply) {
 360                         api_no_reply(conn, req);
 361                         return;
 362                 }
 363                 api_rpc_trans_reply(conn, req, p);
 364                 break;
 365         case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
 366                 /* Wait Named Pipe Handle state */
 367                 api_WNPHS(conn, req, p, params, tpscnt);
 368                 break;
 369         case TRANSACT_SETNAMEDPIPEHANDLESTATE:
 370                 /* Set Named Pipe Handle state */
 371                 api_SNPHS(conn, req, p, params, tpscnt);
 372                 break;
 373         default:
 374                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 375                 return;
 376         }
 377 }
 378
 379 /****************************************************************************
 380  Handle named pipe commands.
 381 ****************************************************************************/
 382
 383 static void named_pipe(connection_struct *conn, uint16 vuid,
 384                        struct smb_request *req,
 385                        const char *name, uint16 *setup,
 386                        char *data, char *params,
 387                        int suwcnt, int tdscnt,int tpscnt,
 388                        int msrcnt, int mdrcnt, int mprcnt)
 389 {
 390         DEBUG(3,("named pipe command on <%s> name\n", name));
 391
 392         if (strequal(name,"LANMAN")) {
 393                 api_reply(conn, vuid, req,
 394                           data, params,
 395                           tdscnt, tpscnt,
 396                           mdrcnt, mprcnt);
 397                 return;
 398         }
 399
 400         if (strequal(name,"WKSSVC") ||
 401             strequal(name,"SRVSVC") ||
 402             strequal(name,"WINREG") ||
 403             strequal(name,"SAMR") ||
 404             strequal(name,"LSARPC")) {
 405
 406                 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
 407
 408                 api_fd_reply(conn, vuid, req,
 409                              setup, data, params,
 410                              suwcnt, tdscnt, tpscnt,
 411                              mdrcnt, mprcnt);
 412                 return;
 413         }
 414
 415         if (strlen(name) < 1) {
 416                 api_fd_reply(conn, vuid, req,
 417                              setup, data,
 418                              params, suwcnt, tdscnt,
 419                              tpscnt, mdrcnt, mprcnt);
 420                 return;
 421         }
 422
 423         if (setup)
 424                 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
 425                          (int)setup[0],(int)setup[1]));
 426
 427         reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 428         return;
 429 }
 430
 431 static void handle_trans(connection_struct *conn, struct smb_request *req,
 432                          struct trans_state *state)
 433 {
 434         char *local_machine_name;
 435         int name_offset = 0;
 436
 437         DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
 438                  state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
 439                  (unsigned int)state->setup_count));
 440
 441         /*
 442          * WinCE wierdness....
 443          */
 444
 445         local_machine_name = talloc_asprintf(state, "\\%s\\",
 446                                              get_local_machine_name());
 447
 448         if (local_machine_name == NULL) {
 449                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 450                 return;
 451         }
 452
 453         if (strnequal(state->name, local_machine_name,
 454                       strlen(local_machine_name))) {
 455                 name_offset = strlen(local_machine_name)-1;
 456         }
 457
 458         if (!strnequal(&state->name[name_offset], "\\PIPE",
 459                        strlen("\\PIPE"))) {
 460                 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 461                 return;
 462         }
 463
 464         name_offset += strlen("\\PIPE");
 465
 466         /* Win9x weirdness.  When talking to a unicode server Win9x
 467            only sends \PIPE instead of \PIPE\ */
 468
 469         if (state->name[name_offset] == '\\')
 470                 name_offset++;
 471
 472         DEBUG(5,("calling named_pipe\n"));
 473         named_pipe(conn, state->vuid, req,
 474                    state->name+name_offset,
 475                    state->setup,state->data,
 476                    state->param,
 477                    state->setup_count,state->total_data,
 478                    state->total_param,
 479                    state->max_setup_return,
 480                    state->max_data_return,
 481                    state->max_param_return);
 482
 483         if (state->close_on_completion) {
 484                 close_cnum(conn,state->vuid);
 485                 req->conn = NULL;
 486         }
 487
 488         return;
 489 }
 490
 491 /****************************************************************************
 492  Reply to a SMBtrans.
 493  ****************************************************************************/
 494
 495 void reply_trans(struct smb_request *req)
 496 {
 497         connection_struct *conn = req->conn;
 498         unsigned int dsoff;
 499         unsigned int dscnt;
 500         unsigned int psoff;
 501         unsigned int pscnt;
 502         struct trans_state *state;
 503         NTSTATUS result;
 504         unsigned int size;
 505         unsigned int av_size;
 506
 507         START_PROFILE(SMBtrans);
 508
 509         if (req->wct < 14) {
 510                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 511                 END_PROFILE(SMBtrans);
 512                 return;
 513         }
 514
 515         size = smb_len(req->inbuf) + 4;
 516         av_size = smb_len(req->inbuf);
 517         dsoff = SVAL(req->inbuf, smb_dsoff);
 518         dscnt = SVAL(req->inbuf, smb_dscnt);
 519         psoff = SVAL(req->inbuf, smb_psoff);
 520         pscnt = SVAL(req->inbuf, smb_pscnt);
 521
 522         result = allow_new_trans(conn->pending_trans, req->mid);
 523         if (!NT_STATUS_IS_OK(result)) {
 524                 DEBUG(2, ("Got invalid trans request: %s\n",
 525                           nt_errstr(result)));
 526                 reply_nterror(req, result);
 527                 END_PROFILE(SMBtrans);
 528                 return;
 529         }
 530
 531         if ((state = TALLOC_P(conn, struct trans_state)) == NULL) {
 532                 DEBUG(0, ("talloc failed\n"));
 533                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 534                 END_PROFILE(SMBtrans);
 535                 return;
 536         }
 537
 538         state->cmd = SMBtrans;
 539
 540         state->mid = req->mid;
 541         state->vuid = req->vuid;
 542         state->setup_count = CVAL(req->inbuf, smb_suwcnt);
 543         state->setup = NULL;
 544         state->total_param = SVAL(req->inbuf, smb_tpscnt);
 545         state->param = NULL;
 546         state->total_data = SVAL(req->inbuf, smb_tdscnt);
 547         state->data = NULL;
 548         state->max_param_return = SVAL(req->inbuf, smb_mprcnt);
 549         state->max_data_return = SVAL(req->inbuf, smb_mdrcnt);
 550         state->max_setup_return = CVAL(req->inbuf, smb_msrcnt);
 551         state->close_on_completion = BITSETW(req->inbuf+smb_vwv5,0);
 552         state->one_way = BITSETW(req->inbuf+smb_vwv5,1);
 553
 554         srvstr_pull_buf_talloc(state, req->inbuf, req->flags2, &state->name,
 555                         smb_buf(req->inbuf), STR_TERMINATE);
 556
 557         if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
 558                         !state->name)
 559                 goto bad_param;
 560
 561         if (state->total_data)  {
 562                 /* Can't use talloc here, the core routines do realloc on the
 563                  * params and data. Out of paranoia, 100 bytes too many. */
 564                 state->data = (char *)SMB_MALLOC(state->total_data+100);
 565                 if (state->data == NULL) {
 566                         DEBUG(0,("reply_trans: data malloc fail for %u "
 567                                  "bytes !\n", (unsigned int)state->total_data));
 568                         TALLOC_FREE(state);
 569                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 570                         END_PROFILE(SMBtrans);
 571                         return;
 572                 }
 573                 /* null-terminate the slack space */
 574                 memset(&state->data[state->total_data], 0, 100);
 575
 576                 if (dscnt > state->total_data ||
 577                                 dsoff+dscnt < dsoff) {
 578                         goto bad_param;
 579                 }
 580
 581                 if (dsoff > av_size ||
 582                                 dscnt > av_size ||
 583                                 dsoff+dscnt > av_size) {
 584                         goto bad_param;
 585                 }
 586
 587                 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
 588         }
 589
 590         if (state->total_param) {
 591                 /* Can't use talloc here, the core routines do realloc on the
 592                  * params and data. Out of paranoia, 100 bytes too many */
 593                 state->param = (char *)SMB_MALLOC(state->total_param+100);
 594                 if (state->param == NULL) {
 595                         DEBUG(0,("reply_trans: param malloc fail for %u "
 596                                  "bytes !\n", (unsigned int)state->total_param));
 597                         SAFE_FREE(state->data);
 598                         TALLOC_FREE(state);
 599                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 600                         END_PROFILE(SMBtrans);
 601                         return;
 602                 }
 603                 /* null-terminate the slack space */
 604                 memset(&state->param[state->total_param], 0, 100);
 605
 606                 if (pscnt > state->total_param ||
 607                                 psoff+pscnt < psoff) {
 608                         goto bad_param;
 609                 }
 610
 611                 if (psoff > av_size ||
 612                                 pscnt > av_size ||
 613                                 psoff+pscnt > av_size) {
 614                         goto bad_param;
 615                 }
 616
 617                 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
 618         }
 619
 620         state->received_data  = dscnt;
 621         state->received_param = pscnt;
 622
 623         if (state->setup_count) {
 624                 unsigned int i;
 625                 if((state->setup = TALLOC_ARRAY(
 626                             state, uint16, state->setup_count)) == NULL) {
 627                         DEBUG(0,("reply_trans: setup malloc fail for %u "
 628                                  "bytes !\n", (unsigned int)
 629                                  (state->setup_count * sizeof(uint16))));
 630                         SAFE_FREE(state->data);
 631                         SAFE_FREE(state->param);
 632                         TALLOC_FREE(state);
 633                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 634                         END_PROFILE(SMBtrans);
 635                         return;
 636                 }
 637                 if (req->inbuf+smb_vwv14+(state->setup_count*SIZEOFWORD) >
 638                     req->inbuf + size)
 639                         goto bad_param;
 640                 if ((smb_vwv14+(state->setup_count*SIZEOFWORD) < smb_vwv14) ||
 641                     (smb_vwv14+(state->setup_count*SIZEOFWORD) <
 642                      (state->setup_count*SIZEOFWORD)))
 643                         goto bad_param;
 644
 645                 for (i=0;i<state->setup_count;i++)
 646                         state->setup[i] = SVAL(req->inbuf,
 647                                                smb_vwv14+i*SIZEOFWORD);
 648         }
 649
 650         state->received_param = pscnt;
 651
 652         if ((state->received_param != state->total_param) ||
 653             (state->received_data != state->total_data)) {
 654                 DLIST_ADD(conn->pending_trans, state);
 655
 656                 /* We need to send an interim response then receive the rest
 657                    of the parameter/data bytes */
 658                 reply_outbuf(req, 0, 0);
 659                 show_msg((char *)req->outbuf);
 660                 END_PROFILE(SMBtrans);
 661                 return;
 662         }
 663
 664         handle_trans(conn, req, state);
 665
 666         SAFE_FREE(state->data);
 667         SAFE_FREE(state->param);
 668         TALLOC_FREE(state);
 669
 670         END_PROFILE(SMBtrans);
 671         return;
 672
 673   bad_param:
 674
 675         DEBUG(0,("reply_trans: invalid trans parameters\n"));
 676         SAFE_FREE(state->data);
 677         SAFE_FREE(state->param);
 678         TALLOC_FREE(state);
 679         END_PROFILE(SMBtrans);
 680         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 681         return;
 682 }
 683
 684 /****************************************************************************
 685  Reply to a secondary SMBtrans.
 686  ****************************************************************************/
 687
 688 void reply_transs(struct smb_request *req)
 689 {
 690         connection_struct *conn = req->conn;
 691         unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
 692         struct trans_state *state;
 693         unsigned int av_size;
 694
 695         START_PROFILE(SMBtranss);
 696
 697         show_msg((char *)req->inbuf);
 698
 699         if (req->wct < 8) {
 700                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 701                 END_PROFILE(SMBtranss);
 702                 return;
 703         }
 704
 705         for (state = conn->pending_trans; state != NULL;
 706              state = state->next) {
 707                 if (state->mid == req->mid) {
 708                         break;
 709                 }
 710         }
 711
 712         if ((state == NULL) || (state->cmd != SMBtrans)) {
 713                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 714                 END_PROFILE(SMBtranss);
 715                 return;
 716         }
 717
 718         /* Revise total_params and total_data in case they have changed
 719          * downwards */
 720
 721         if (SVAL(req->inbuf, smb_vwv0) < state->total_param)
 722                 state->total_param = SVAL(req->inbuf,smb_vwv0);
 723         if (SVAL(req->inbuf, smb_vwv1) < state->total_data)
 724                 state->total_data = SVAL(req->inbuf,smb_vwv1);
 725
 726         av_size = smb_len(req->inbuf);
 727
 728         pcnt = SVAL(req->inbuf, smb_spscnt);
 729         poff = SVAL(req->inbuf, smb_spsoff);
 730         pdisp = SVAL(req->inbuf, smb_spsdisp);
 731
 732         dcnt = SVAL(req->inbuf, smb_sdscnt);
 733         doff = SVAL(req->inbuf, smb_sdsoff);
 734         ddisp = SVAL(req->inbuf, smb_sdsdisp);
 735
 736         state->received_param += pcnt;
 737         state->received_data += dcnt;
 738
 739         if ((state->received_data > state->total_data) ||
 740             (state->received_param > state->total_param))
 741                 goto bad_param;
 742
 743         if (pcnt) {
 744                 if (pdisp > state->total_param ||
 745                                 pcnt > state->total_param ||
 746                                 pdisp+pcnt > state->total_param ||
 747                                 pdisp+pcnt < pdisp) {
 748                         goto bad_param;
 749                 }
 750
 751                 if (poff > av_size ||
 752                                 pcnt > av_size ||
 753                                 poff+pcnt > av_size ||
 754                                 poff+pcnt < poff) {
 755                         goto bad_param;
 756                 }
 757
 758                 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,
 759                        pcnt);
 760         }
 761
 762         if (dcnt) {
 763                 if (ddisp > state->total_data ||
 764                                 dcnt > state->total_data ||
 765                                 ddisp+dcnt > state->total_data ||
 766                                 ddisp+dcnt < ddisp) {
 767                         goto bad_param;
 768                 }
 769
 770                 if (ddisp > av_size ||
 771                                 dcnt > av_size ||
 772                                 ddisp+dcnt > av_size ||
 773                                 ddisp+dcnt < ddisp) {
 774                         goto bad_param;
 775                 }
 776
 777                 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,
 778                        dcnt);
 779         }
 780
 781         if ((state->received_param < state->total_param) ||
 782             (state->received_data < state->total_data)) {
 783                 END_PROFILE(SMBtranss);
 784                 return;
 785         }
 786
 787         /*
 788          * construct_reply_common will copy smb_com from inbuf to
 789          * outbuf. SMBtranss is wrong here.
 790          */
 791         SCVAL(req->inbuf,smb_com,SMBtrans);
 792
 793         handle_trans(conn, req, state);
 794
 795         DLIST_REMOVE(conn->pending_trans, state);
 796         SAFE_FREE(state->data);
 797         SAFE_FREE(state->param);
 798         TALLOC_FREE(state);
 799
 800         END_PROFILE(SMBtranss);
 801         return;
 802
 803   bad_param:
 804
 805         DEBUG(0,("reply_transs: invalid trans parameters\n"));
 806         DLIST_REMOVE(conn->pending_trans, state);
 807         SAFE_FREE(state->data);
 808         SAFE_FREE(state->param);
 809         TALLOC_FREE(state);
 810         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 811         END_PROFILE(SMBtranss);
 812         return;
 813 }