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 extern int smb_read_error;
  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)+1;
  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]\n",
  58                         param_offset, param_offset + param_len,
  59                         data_offset , data_offset  + data_len));
  60
  61         if (param_len)
  62                 memcpy(copy_into, &rparam[param_offset], param_len);
  63
  64         copy_into += param_len + align;
  65
  66         if (data_len )
  67                 memcpy(copy_into, &rdata[data_offset], data_len);
  68 }
  69
  70 /****************************************************************************
  71  Send a trans reply.
  72  ****************************************************************************/
  73
  74 void send_trans_reply(const char *inbuf,
  75                         char *outbuf,
  76                         char *rparam,
  77                         int rparam_len,
  78                         char *rdata,
  79                         int rdata_len,
  80                         BOOL buffer_too_large)
  81 {
  82         int this_ldata,this_lparam;
  83         int tot_data_sent = 0;
  84         int tot_param_sent = 0;
  85         int align;
  86
  87         int ldata  = rdata  ? rdata_len : 0;
  88         int lparam = rparam ? rparam_len : 0;
  89
  90         if (buffer_too_large)
  91                 DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
  92
  93         this_lparam = MIN(lparam,max_send - 500); /* hack */
  94         this_ldata  = MIN(ldata,max_send - (500+this_lparam));
  95
  96         align = ((this_lparam)%4);
  97
  98         if (buffer_too_large) {
  99                 ERROR_BOTH(STATUS_BUFFER_OVERFLOW,ERRDOS,ERRmoredata);
 100         }
 101
 102         set_message(inbuf,outbuf,10,1+align+this_ldata+this_lparam,True);
 103
 104         copy_trans_params_and_data(outbuf, align,
 105                                 rparam, tot_param_sent, this_lparam,
 106                                 rdata, tot_data_sent, this_ldata);
 107
 108         SSVAL(outbuf,smb_vwv0,lparam);
 109         SSVAL(outbuf,smb_vwv1,ldata);
 110         SSVAL(outbuf,smb_vwv3,this_lparam);
 111         SSVAL(outbuf,smb_vwv4,smb_offset(smb_buf(outbuf)+1,outbuf));
 112         SSVAL(outbuf,smb_vwv5,0);
 113         SSVAL(outbuf,smb_vwv6,this_ldata);
 114         SSVAL(outbuf,smb_vwv7,smb_offset(smb_buf(outbuf)+1+this_lparam+align,outbuf));
 115         SSVAL(outbuf,smb_vwv8,0);
 116         SSVAL(outbuf,smb_vwv9,0);
 117
 118         show_msg(outbuf);
 119         if (!send_smb(smbd_server_fd(),outbuf))
 120                 exit_server_cleanly("send_trans_reply: send_smb failed.");
 121
 122         tot_data_sent = this_ldata;
 123         tot_param_sent = this_lparam;
 124
 125         while (tot_data_sent < ldata || tot_param_sent < lparam)
 126         {
 127                 this_lparam = MIN(lparam-tot_param_sent, max_send - 500); /* hack */
 128                 this_ldata  = MIN(ldata -tot_data_sent, max_send - (500+this_lparam));
 129
 130                 if(this_lparam < 0)
 131                         this_lparam = 0;
 132
 133                 if(this_ldata < 0)
 134                         this_ldata = 0;
 135
 136                 align = (this_lparam%4);
 137
 138                 set_message(inbuf,outbuf,10,1+this_ldata+this_lparam+align,False);
 139
 140                 copy_trans_params_and_data(outbuf, align,
 141                                            rparam, tot_param_sent, this_lparam,
 142                                            rdata, tot_data_sent, this_ldata);
 143
 144                 SSVAL(outbuf,smb_vwv3,this_lparam);
 145                 SSVAL(outbuf,smb_vwv4,smb_offset(smb_buf(outbuf)+1,outbuf));
 146                 SSVAL(outbuf,smb_vwv5,tot_param_sent);
 147                 SSVAL(outbuf,smb_vwv6,this_ldata);
 148                 SSVAL(outbuf,smb_vwv7,smb_offset(smb_buf(outbuf)+1+this_lparam+align,outbuf));
 149                 SSVAL(outbuf,smb_vwv8,tot_data_sent);
 150                 SSVAL(outbuf,smb_vwv9,0);
 151
 152                 show_msg(outbuf);
 153                 if (!send_smb(smbd_server_fd(),outbuf))
 154                         exit_server_cleanly("send_trans_reply: send_smb failed.");
 155
 156                 tot_data_sent  += this_ldata;
 157                 tot_param_sent += this_lparam;
 158         }
 159 }
 160
 161 /****************************************************************************
 162  Start the first part of an RPC reply which began with an SMBtrans request.
 163 ****************************************************************************/
 164
 165 static BOOL api_rpc_trans_reply(const char *inbuf,
 166                                 char *outbuf,
 167                                 smb_np_struct *p)
 168 {
 169         BOOL is_data_outstanding;
 170         char *rdata = (char *)SMB_MALLOC(p->max_trans_reply);
 171         int data_len;
 172
 173         if(rdata == NULL) {
 174                 DEBUG(0,("api_rpc_trans_reply: malloc fail.\n"));
 175                 return False;
 176         }
 177
 178         if((data_len = read_from_pipe( p, rdata, p->max_trans_reply,
 179                                         &is_data_outstanding)) < 0) {
 180                 SAFE_FREE(rdata);
 181                 return False;
 182         }
 183
 184         send_trans_reply(inbuf, outbuf, NULL, 0, rdata, data_len, is_data_outstanding);
 185
 186         SAFE_FREE(rdata);
 187         return True;
 188 }
 189
 190 /****************************************************************************
 191  WaitNamedPipeHandleState
 192 ****************************************************************************/
 193
 194 static BOOL api_WNPHS(const char *inbuf,
 195                         char *outbuf,
 196                         smb_np_struct *p,
 197                         char *param,
 198                         int param_len)
 199 {
 200         uint16 priority;
 201
 202         if (!param || param_len < 2)
 203                 return False;
 204
 205         priority = SVAL(param,0);
 206         DEBUG(4,("WaitNamedPipeHandleState priority %x\n", priority));
 207
 208         if (wait_rpc_pipe_hnd_state(p, priority)) {
 209                 /* now send the reply */
 210                 send_trans_reply(inbuf, outbuf, NULL, 0, NULL, 0, False);
 211                 return True;
 212         }
 213         return False;
 214 }
 215
 216
 217 /****************************************************************************
 218  SetNamedPipeHandleState
 219 ****************************************************************************/
 220
 221 static BOOL api_SNPHS(const char *inbuf,
 222                         char *outbuf,
 223                         smb_np_struct *p,
 224                         char *param,
 225                         int param_len)
 226 {
 227         uint16 id;
 228
 229         if (!param || param_len < 2)
 230                 return False;
 231
 232         id = SVAL(param,0);
 233         DEBUG(4,("SetNamedPipeHandleState to code %x\n", id));
 234
 235         if (set_rpc_pipe_hnd_state(p, id)) {
 236                 /* now send the reply */
 237                 send_trans_reply(inbuf, outbuf, NULL, 0, NULL, 0, False);
 238                 return True;
 239         }
 240         return False;
 241 }
 242
 243
 244 /****************************************************************************
 245  When no reply is generated, indicate unsupported.
 246  ****************************************************************************/
 247
 248 static BOOL api_no_reply(const char *inbuf, char *outbuf, int max_rdata_len)
 249 {
 250         char rparam[4];
 251
 252         /* unsupported */
 253         SSVAL(rparam,0,NERR_notsupported);
 254         SSVAL(rparam,2,0); /* converter word */
 255
 256         DEBUG(3,("Unsupported API fd command\n"));
 257
 258         /* now send the reply */
 259         send_trans_reply(inbuf, outbuf, rparam, 4, NULL, 0, False);
 260
 261         return -1;
 262 }
 263
 264 /****************************************************************************
 265  Handle remote api calls delivered to a named pipe already opened.
 266  ****************************************************************************/
 267
 268 static int api_fd_reply(connection_struct *conn,
 269                         uint16 vuid,
 270                         const char *inbuf,
 271                         char *outbuf,
 272                         uint16 *setup,
 273                         char *data,
 274                         char *params,
 275                         int suwcnt,
 276                         int tdscnt,
 277                         int tpscnt,
 278                         int mdrcnt,
 279                         int mprcnt)
 280 {
 281         BOOL reply = False;
 282         smb_np_struct *p = NULL;
 283         int pnum;
 284         int subcommand;
 285
 286         DEBUG(5,("api_fd_reply\n"));
 287
 288         /* First find out the name of this file. */
 289         if (suwcnt != 2) {
 290                 DEBUG(0,("Unexpected named pipe transaction.\n"));
 291                 return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
 292         }
 293
 294         /* Get the file handle and hence the file name. */
 295         /*
 296          * NB. The setup array has already been transformed
 297          * via SVAL and so is in gost byte order.
 298          */
 299         pnum = ((int)setup[1]) & 0xFFFF;
 300         subcommand = ((int)setup[0]) & 0xFFFF;
 301
 302         if(!(p = get_rpc_pipe(pnum))) {
 303                 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
 304                         /* Win9x does this call with a unicode pipe name, not a pnum. */
 305                         /* Just return success for now... */
 306                         DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
 307                         send_trans_reply(inbuf, outbuf, NULL, 0, NULL, 0, False);
 308                         return -1;
 309                 }
 310
 311                 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
 312                 return ERROR_NT(NT_STATUS_INVALID_HANDLE);
 313         }
 314
 315         if (vuid != p->vuid) {
 316                 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
 317                           "expected %d\n", pnum, vuid, p->vuid));
 318                 return ERROR_NT(NT_STATUS_INVALID_HANDLE);
 319         }
 320
 321         DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n", subcommand, p->name, pnum));
 322
 323         /* record maximum data length that can be transmitted in an SMBtrans */
 324         p->max_trans_reply = mdrcnt;
 325
 326         DEBUG(10,("api_fd_reply: p:%p max_trans_reply: %d\n", p, p->max_trans_reply));
 327
 328         switch (subcommand) {
 329         case TRANSACT_DCERPCCMD:
 330                 /* dce/rpc command */
 331                 reply = write_to_pipe(p, data, tdscnt);
 332                 if (reply)
 333                         reply = api_rpc_trans_reply(inbuf, outbuf, p);
 334                 break;
 335         case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
 336                 /* Wait Named Pipe Handle state */
 337                 reply = api_WNPHS(inbuf, outbuf, p, params, tpscnt);
 338                 break;
 339         case TRANSACT_SETNAMEDPIPEHANDLESTATE:
 340                 /* Set Named Pipe Handle state */
 341                 reply = api_SNPHS(inbuf, outbuf, p, params, tpscnt);
 342                 break;
 343         default:
 344                 return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
 345         }
 346
 347         if (!reply)
 348                 return api_no_reply(inbuf, outbuf, mdrcnt);
 349
 350         return -1;
 351 }
 352
 353 /****************************************************************************
 354  Handle named pipe commands.
 355 ****************************************************************************/
 356
 357 static int named_pipe(connection_struct *conn,
 358                         uint16 vuid,
 359                         const char *inbuf,
 360                         char *outbuf,
 361                         char *name,
 362                         uint16 *setup,
 363                         char *data,
 364                         char *params,
 365                         int suwcnt,
 366                         int tdscnt,
 367                         int tpscnt,
 368                         int msrcnt,
 369                         int mdrcnt,
 370                         int mprcnt)
 371 {
 372         DEBUG(3,("named pipe command on <%s> name\n", name));
 373
 374         if (strequal(name,"LANMAN")) {
 375                 return api_reply(conn,
 376                                 vuid,
 377                                 inbuf,
 378                                 outbuf,
 379                                 data,
 380                                 params,
 381                                 tdscnt,
 382                                 tpscnt,
 383                                 mdrcnt,
 384                                 mprcnt);
 385         }
 386
 387         if (strequal(name,"WKSSVC") ||
 388             strequal(name,"SRVSVC") ||
 389             strequal(name,"WINREG") ||
 390             strequal(name,"SAMR") ||
 391             strequal(name,"LSARPC")) {
 392                 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
 393                 return api_fd_reply(conn,
 394                                         vuid,
 395                                         inbuf,
 396                                         outbuf,
 397                                         setup,
 398                                         data,
 399                                         params,
 400                                         suwcnt,
 401                                         tdscnt,
 402                                         tpscnt,
 403                                         mdrcnt,
 404                                         mprcnt);
 405         }
 406
 407         if (strlen(name) < 1) {
 408                 return api_fd_reply(conn,
 409                                         vuid,
 410                                         inbuf,
 411                                         outbuf,
 412                                         setup,
 413                                         data,
 414                                         params,
 415                                         suwcnt,
 416                                         tdscnt,
 417                                         tpscnt,
 418                                         mdrcnt,
 419                                         mprcnt);
 420         }
 421
 422         if (setup)
 423                 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n", (int)setup[0],(int)setup[1]));
 424
 425         return 0;
 426 }
 427
 428 static NTSTATUS handle_trans(connection_struct *conn,
 429                                 struct trans_state *state,
 430                                 const char *inbuf,
 431                                 char *outbuf,
 432                                 int *outsize)
 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                 return NT_STATUS_NO_MEMORY;
 450         }
 451
 452         if (strnequal(state->name, local_machine_name,
 453                       strlen(local_machine_name))) {
 454                 name_offset = strlen(local_machine_name)-1;
 455         }
 456
 457         if (!strnequal(&state->name[name_offset], "\\PIPE",
 458                        strlen("\\PIPE"))) {
 459                 return NT_STATUS_NOT_SUPPORTED;
 460         }
 461
 462         name_offset += strlen("\\PIPE");
 463
 464         /* Win9x weirdness.  When talking to a unicode server Win9x
 465            only sends \PIPE instead of \PIPE\ */
 466
 467         if (state->name[name_offset] == '\\')
 468                 name_offset++;
 469
 470         DEBUG(5,("calling named_pipe\n"));
 471         *outsize = named_pipe(conn,
 472                                 state->vuid,
 473                                 inbuf,
 474                                 outbuf,
 475                                 state->name+name_offset,
 476                                 state->setup,state->data,
 477                                 state->param,
 478                                 state->setup_count,state->total_data,
 479                                 state->total_param,
 480                                 state->max_setup_return,
 481                                 state->max_data_return,
 482                                 state->max_param_return);
 483
 484         if (*outsize == 0) {
 485                 return NT_STATUS_NOT_SUPPORTED;
 486         }
 487
 488         if (state->close_on_completion)
 489                 close_cnum(conn,state->vuid);
 490
 491         return NT_STATUS_OK;
 492 }
 493
 494 /****************************************************************************
 495  Reply to a SMBtrans.
 496  ****************************************************************************/
 497
 498 int reply_trans(connection_struct *conn,
 499                 char *inbuf,
 500                 char *outbuf,
 501                 int size,
 502                 int bufsize)
 503 {
 504         int outsize = 0;
 505         unsigned int dsoff = SVAL(inbuf, smb_dsoff);
 506         unsigned int dscnt = SVAL(inbuf, smb_dscnt);
 507         unsigned int psoff = SVAL(inbuf, smb_psoff);
 508         unsigned int pscnt = SVAL(inbuf, smb_pscnt);
 509         struct trans_state *state;
 510         NTSTATUS result;
 511
 512         START_PROFILE(SMBtrans);
 513
 514         result = allow_new_trans(conn->pending_trans, SVAL(inbuf, smb_mid));
 515         if (!NT_STATUS_IS_OK(result)) {
 516                 DEBUG(2, ("Got invalid trans request: %s\n",
 517                           nt_errstr(result)));
 518                 END_PROFILE(SMBtrans);
 519                 return ERROR_NT(result);
 520         }
 521
 522         if ((state = TALLOC_P(conn->mem_ctx, struct trans_state)) == NULL) {
 523                 DEBUG(0, ("talloc failed\n"));
 524                 END_PROFILE(SMBtrans);
 525                 return ERROR_NT(NT_STATUS_NO_MEMORY);
 526         }
 527
 528         state->cmd = SMBtrans;
 529
 530         state->mid = SVAL(inbuf, smb_mid);
 531         state->vuid = SVAL(inbuf, smb_uid);
 532         state->setup_count = CVAL(inbuf, smb_suwcnt);
 533         state->setup = NULL;
 534         state->total_param = SVAL(inbuf, smb_tpscnt);
 535         state->param = NULL;
 536         state->total_data = SVAL(inbuf, smb_tdscnt);
 537         state->data = NULL;
 538         state->max_param_return = SVAL(inbuf, smb_mprcnt);
 539         state->max_data_return = SVAL(inbuf, smb_mdrcnt);
 540         state->max_setup_return = CVAL(inbuf, smb_msrcnt);
 541         state->close_on_completion = BITSETW(inbuf+smb_vwv5,0);
 542         state->one_way = BITSETW(inbuf+smb_vwv5,1);
 543
 544         memset(state->name, '\0',sizeof(state->name));
 545         srvstr_pull_buf(inbuf, SVAL(inbuf, smb_flg2), state->name,
 546                         smb_buf(inbuf), sizeof(state->name), STR_TERMINATE);
 547
 548         if ((dscnt > state->total_data) || (pscnt > state->total_param))
 549                 goto bad_param;
 550
 551         if (state->total_data)  {
 552                 /* Can't use talloc here, the core routines do realloc on the
 553                  * params and data. Out of paranoia, 100 bytes too many. */
 554                 state->data = (char *)SMB_MALLOC(state->total_data+100);
 555                 if (state->data == NULL) {
 556                         DEBUG(0,("reply_trans: data malloc fail for %u "
 557                                  "bytes !\n", (unsigned int)state->total_data));
 558                         TALLOC_FREE(state);
 559                         END_PROFILE(SMBtrans);
 560                         return(ERROR_DOS(ERRDOS,ERRnomem));
 561                 }
 562                 /* null-terminate the slack space */
 563                 memset(&state->data[state->total_data], 0, 100);
 564                 if ((dsoff+dscnt < dsoff) || (dsoff+dscnt < dscnt))
 565                         goto bad_param;
 566                 if ((smb_base(inbuf)+dsoff+dscnt > inbuf + size) ||
 567                     (smb_base(inbuf)+dsoff+dscnt < smb_base(inbuf)))
 568                         goto bad_param;
 569
 570                 memcpy(state->data,smb_base(inbuf)+dsoff,dscnt);
 571         }
 572
 573         if (state->total_param) {
 574                 /* Can't use talloc here, the core routines do realloc on the
 575                  * params and data. Out of paranoia, 100 bytes too many */
 576                 state->param = (char *)SMB_MALLOC(state->total_param+100);
 577                 if (state->param == NULL) {
 578                         DEBUG(0,("reply_trans: param malloc fail for %u "
 579                                  "bytes !\n", (unsigned int)state->total_param));
 580                         SAFE_FREE(state->data);
 581                         TALLOC_FREE(state);
 582                         END_PROFILE(SMBtrans);
 583                         return(ERROR_DOS(ERRDOS,ERRnomem));
 584                 }
 585                 /* null-terminate the slack space */
 586                 memset(&state->param[state->total_param], 0, 100);
 587                 if ((psoff+pscnt < psoff) || (psoff+pscnt < pscnt))
 588                         goto bad_param;
 589                 if ((smb_base(inbuf)+psoff+pscnt > inbuf + size) ||
 590                     (smb_base(inbuf)+psoff+pscnt < smb_base(inbuf)))
 591                         goto bad_param;
 592
 593                 memcpy(state->param,smb_base(inbuf)+psoff,pscnt);
 594         }
 595
 596         state->received_data  = dscnt;
 597         state->received_param = pscnt;
 598
 599         if (state->setup_count) {
 600                 unsigned int i;
 601                 if((state->setup = TALLOC_ARRAY(
 602                             state, uint16, state->setup_count)) == NULL) {
 603                         DEBUG(0,("reply_trans: setup malloc fail for %u "
 604                                  "bytes !\n", (unsigned int)
 605                                  (state->setup_count * sizeof(uint16))));
 606                         TALLOC_FREE(state);
 607                         END_PROFILE(SMBtrans);
 608                         return(ERROR_DOS(ERRDOS,ERRnomem));
 609                 }
 610                 if (inbuf+smb_vwv14+(state->setup_count*SIZEOFWORD) >
 611                     inbuf + size)
 612                         goto bad_param;
 613                 if ((smb_vwv14+(state->setup_count*SIZEOFWORD) < smb_vwv14) ||
 614                     (smb_vwv14+(state->setup_count*SIZEOFWORD) <
 615                      (state->setup_count*SIZEOFWORD)))
 616                         goto bad_param;
 617
 618                 for (i=0;i<state->setup_count;i++)
 619                         state->setup[i] = SVAL(inbuf,smb_vwv14+i*SIZEOFWORD);
 620         }
 621
 622         state->received_param = pscnt;
 623
 624         if ((state->received_param == state->total_param) &&
 625             (state->received_data == state->total_data)) {
 626
 627                 result = handle_trans(conn, state, inbuf, outbuf, &outsize);
 628
 629                 SAFE_FREE(state->data);
 630                 SAFE_FREE(state->param);
 631                 TALLOC_FREE(state);
 632
 633                 if (!NT_STATUS_IS_OK(result)) {
 634                         END_PROFILE(SMBtrans);
 635                         return ERROR_NT(result);
 636                 }
 637
 638                 if (outsize == 0) {
 639                         END_PROFILE(SMBtrans);
 640                         return ERROR_NT(NT_STATUS_INTERNAL_ERROR);
 641                 }
 642
 643                 END_PROFILE(SMBtrans);
 644                 return outsize;
 645         }
 646
 647         DLIST_ADD(conn->pending_trans, state);
 648
 649         /* We need to send an interim response then receive the rest
 650            of the parameter/data bytes */
 651         outsize = set_message(inbuf,outbuf,0,0,True);
 652         show_msg(outbuf);
 653         END_PROFILE(SMBtrans);
 654         return outsize;
 655
 656   bad_param:
 657
 658         DEBUG(0,("reply_trans: invalid trans parameters\n"));
 659         SAFE_FREE(state->data);
 660         SAFE_FREE(state->param);
 661         TALLOC_FREE(state);
 662         END_PROFILE(SMBtrans);
 663         return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
 664 }
 665
 666 /****************************************************************************
 667  Reply to a secondary SMBtrans.
 668  ****************************************************************************/
 669
 670 int reply_transs(connection_struct *conn, char *inbuf,char *outbuf,
 671                  int size, int bufsize)
 672 {
 673         int outsize = 0;
 674         unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
 675         struct trans_state *state;
 676         NTSTATUS result;
 677
 678         START_PROFILE(SMBtranss);
 679
 680         show_msg(inbuf);
 681
 682         for (state = conn->pending_trans; state != NULL;
 683              state = state->next) {
 684                 if (state->mid == SVAL(inbuf,smb_mid)) {
 685                         break;
 686                 }
 687         }
 688
 689         if ((state == NULL) || (state->cmd != SMBtrans)) {
 690                 END_PROFILE(SMBtranss);
 691                 return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
 692         }
 693
 694         /* Revise total_params and total_data in case they have changed
 695          * downwards */
 696
 697         if (SVAL(inbuf, smb_vwv0) < state->total_param)
 698                 state->total_param = SVAL(inbuf,smb_vwv0);
 699         if (SVAL(inbuf, smb_vwv1) < state->total_data)
 700                 state->total_data = SVAL(inbuf,smb_vwv1);
 701
 702         pcnt = SVAL(inbuf, smb_spscnt);
 703         poff = SVAL(inbuf, smb_spsoff);
 704         pdisp = SVAL(inbuf, smb_spsdisp);
 705
 706         dcnt = SVAL(inbuf, smb_sdscnt);
 707         doff = SVAL(inbuf, smb_sdsoff);
 708         ddisp = SVAL(inbuf, smb_sdsdisp);
 709
 710         state->received_param += pcnt;
 711         state->received_data += dcnt;
 712
 713         if ((state->received_data > state->total_data) ||
 714             (state->received_param > state->total_param))
 715                 goto bad_param;
 716
 717         if (pcnt) {
 718                 if (pdisp+pcnt > state->total_param)
 719                         goto bad_param;
 720                 if ((pdisp+pcnt < pdisp) || (pdisp+pcnt < pcnt))
 721                         goto bad_param;
 722                 if (pdisp > state->total_param)
 723                         goto bad_param;
 724                 if ((smb_base(inbuf) + poff + pcnt > inbuf + size) ||
 725                     (smb_base(inbuf) + poff + pcnt < smb_base(inbuf)))
 726                         goto bad_param;
 727                 if (state->param + pdisp < state->param)
 728                         goto bad_param;
 729
 730                 memcpy(state->param+pdisp,smb_base(inbuf)+poff,
 731                        pcnt);
 732         }
 733
 734         if (dcnt) {
 735                 if (ddisp+dcnt > state->total_data)
 736                         goto bad_param;
 737                 if ((ddisp+dcnt < ddisp) || (ddisp+dcnt < dcnt))
 738                         goto bad_param;
 739                 if (ddisp > state->total_data)
 740                         goto bad_param;
 741                 if ((smb_base(inbuf) + doff + dcnt > inbuf + size) ||
 742                     (smb_base(inbuf) + doff + dcnt < smb_base(inbuf)))
 743                         goto bad_param;
 744                 if (state->data + ddisp < state->data)
 745                         goto bad_param;
 746
 747                 memcpy(state->data+ddisp, smb_base(inbuf)+doff,
 748                        dcnt);
 749         }
 750
 751         if ((state->received_param < state->total_param) ||
 752             (state->received_data < state->total_data)) {
 753                 END_PROFILE(SMBtranss);
 754                 return -1;
 755         }
 756
 757         /* construct_reply_common has done us the favor to pre-fill the
 758          * command field with SMBtranss which is wrong :-)
 759          */
 760         SCVAL(outbuf,smb_com,SMBtrans);
 761
 762         result = handle_trans(conn, state, inbuf, outbuf, &outsize);
 763
 764         DLIST_REMOVE(conn->pending_trans, state);
 765         SAFE_FREE(state->data);
 766         SAFE_FREE(state->param);
 767         TALLOC_FREE(state);
 768
 769         if ((outsize == 0) || !NT_STATUS_IS_OK(result)) {
 770                 END_PROFILE(SMBtranss);
 771                 return(ERROR_DOS(ERRSRV,ERRnosupport));
 772         }
 773
 774         END_PROFILE(SMBtranss);
 775         return(outsize);
 776
 777   bad_param:
 778
 779         DEBUG(0,("reply_transs: invalid trans parameters\n"));
 780         DLIST_REMOVE(conn->pending_trans, state);
 781         SAFE_FREE(state->data);
 782         SAFE_FREE(state->param);
 783         TALLOC_FREE(state);
 784         END_PROFILE(SMBtranss);
 785         return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
 786 }