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 2 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, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22    */
  23 /*
  24    This file handles the named pipe and mailslot calls
  25    in the SMBtrans protocol
  26    */
  27
  28 #include "includes.h"
  29
  30 extern int max_send;
  31
  32 #define NERR_notsupported 50
  33
  34 extern int smb_read_error;
  35
  36 /*******************************************************************
  37  copies parameters and data, as needed, into the smb buffer
  38
  39  *both* the data and params sections should be aligned.  this
  40  is fudged in the rpc pipes by
  41  at present, only the data section is.  this may be a possible
  42  cause of some of the ipc problems being experienced.  lkcl26dec97
  43
  44  ******************************************************************/
  45
  46 static void copy_trans_params_and_data(char *outbuf, int align,
  47                                 char *rparam, int param_offset, int param_len,
  48                                 char *rdata, int data_offset, int data_len)
  49 {
  50         char *copy_into = smb_buf(outbuf)+1;
  51
  52         if(param_len < 0)
  53                 param_len = 0;
  54
  55         if(data_len < 0)
  56                 data_len = 0;
  57
  58         DEBUG(5,("copy_trans_params_and_data: params[%d..%d] data[%d..%d]\n",
  59                         param_offset, param_offset + param_len,
  60                         data_offset , data_offset  + data_len));
  61
  62         if (param_len)
  63                 memcpy(copy_into, &rparam[param_offset], param_len);
  64
  65         copy_into += param_len + align;
  66
  67         if (data_len )
  68                 memcpy(copy_into, &rdata[data_offset], data_len);
  69 }
  70
  71 /****************************************************************************
  72  Send a trans reply.
  73  ****************************************************************************/
  74
  75 void send_trans_reply(const char *inbuf,
  76                         char *outbuf,
  77                         char *rparam,
  78                         int rparam_len,
  79                         char *rdata,
  80                         int rdata_len,
  81                         BOOL buffer_too_large)
  82 {
  83         int this_ldata,this_lparam;
  84         int tot_data_sent = 0;
  85         int tot_param_sent = 0;
  86         int align;
  87
  88         int ldata  = rdata  ? rdata_len : 0;
  89         int lparam = rparam ? rparam_len : 0;
  90
  91         if (buffer_too_large)
  92                 DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
  93
  94         this_lparam = MIN(lparam,max_send - 500); /* hack */
  95         this_ldata  = MIN(ldata,max_send - (500+this_lparam));
  96
  97         align = ((this_lparam)%4);
  98
  99         if (buffer_too_large) {
 100                 ERROR_BOTH(STATUS_BUFFER_OVERFLOW,ERRDOS,ERRmoredata);
 101         }
 102
 103         set_message(inbuf,outbuf,10,1+align+this_ldata+this_lparam,True);
 104
 105         copy_trans_params_and_data(outbuf, align,
 106                                 rparam, tot_param_sent, this_lparam,
 107                                 rdata, tot_data_sent, this_ldata);
 108
 109         SSVAL(outbuf,smb_vwv0,lparam);
 110         SSVAL(outbuf,smb_vwv1,ldata);
 111         SSVAL(outbuf,smb_vwv3,this_lparam);
 112         SSVAL(outbuf,smb_vwv4,smb_offset(smb_buf(outbuf)+1,outbuf));
 113         SSVAL(outbuf,smb_vwv5,0);
 114         SSVAL(outbuf,smb_vwv6,this_ldata);
 115         SSVAL(outbuf,smb_vwv7,smb_offset(smb_buf(outbuf)+1+this_lparam+align,outbuf));
 116         SSVAL(outbuf,smb_vwv8,0);
 117         SSVAL(outbuf,smb_vwv9,0);
 118
 119         show_msg(outbuf);
 120         if (!send_smb(smbd_server_fd(),outbuf))
 121                 exit_server_cleanly("send_trans_reply: send_smb failed.");
 122
 123         tot_data_sent = this_ldata;
 124         tot_param_sent = this_lparam;
 125
 126         while (tot_data_sent < ldata || tot_param_sent < lparam)
 127         {
 128                 this_lparam = MIN(lparam-tot_param_sent, max_send - 500); /* hack */
 129                 this_ldata  = MIN(ldata -tot_data_sent, max_send - (500+this_lparam));
 130
 131                 if(this_lparam < 0)
 132                         this_lparam = 0;
 133
 134                 if(this_ldata < 0)
 135                         this_ldata = 0;
 136
 137                 align = (this_lparam%4);
 138
 139                 set_message(inbuf,outbuf,10,1+this_ldata+this_lparam+align,False);
 140
 141                 copy_trans_params_and_data(outbuf, align,
 142                                            rparam, tot_param_sent, this_lparam,
 143                                            rdata, tot_data_sent, this_ldata);
 144
 145                 SSVAL(outbuf,smb_vwv3,this_lparam);
 146                 SSVAL(outbuf,smb_vwv4,smb_offset(smb_buf(outbuf)+1,outbuf));
 147                 SSVAL(outbuf,smb_vwv5,tot_param_sent);
 148                 SSVAL(outbuf,smb_vwv6,this_ldata);
 149                 SSVAL(outbuf,smb_vwv7,smb_offset(smb_buf(outbuf)+1+this_lparam+align,outbuf));
 150                 SSVAL(outbuf,smb_vwv8,tot_data_sent);
 151                 SSVAL(outbuf,smb_vwv9,0);
 152
 153                 show_msg(outbuf);
 154                 if (!send_smb(smbd_server_fd(),outbuf))
 155                         exit_server_cleanly("send_trans_reply: send_smb failed.");
 156
 157                 tot_data_sent  += this_ldata;
 158                 tot_param_sent += this_lparam;
 159         }
 160 }
 161
 162 /****************************************************************************
 163  Start the first part of an RPC reply which began with an SMBtrans request.
 164 ****************************************************************************/
 165
 166 static BOOL api_rpc_trans_reply(const char *inbuf,
 167                                 char *outbuf,
 168                                 smb_np_struct *p)
 169 {
 170         BOOL is_data_outstanding;
 171         char *rdata = (char *)SMB_MALLOC(p->max_trans_reply);
 172         int data_len;
 173
 174         if(rdata == NULL) {
 175                 DEBUG(0,("api_rpc_trans_reply: malloc fail.\n"));
 176                 return False;
 177         }
 178
 179         if((data_len = read_from_pipe( p, rdata, p->max_trans_reply,
 180                                         &is_data_outstanding)) < 0) {
 181                 SAFE_FREE(rdata);
 182                 return False;
 183         }
 184
 185         send_trans_reply(inbuf, outbuf, NULL, 0, rdata, data_len, is_data_outstanding);
 186
 187         SAFE_FREE(rdata);
 188         return True;
 189 }
 190
 191 /****************************************************************************
 192  WaitNamedPipeHandleState
 193 ****************************************************************************/
 194
 195 static BOOL api_WNPHS(const char *inbuf,
 196                         char *outbuf,
 197                         smb_np_struct *p,
 198                         char *param,
 199                         int param_len)
 200 {
 201         uint16 priority;
 202
 203         if (!param || param_len < 2)
 204                 return False;
 205
 206         priority = SVAL(param,0);
 207         DEBUG(4,("WaitNamedPipeHandleState priority %x\n", priority));
 208
 209         if (wait_rpc_pipe_hnd_state(p, priority)) {
 210                 /* now send the reply */
 211                 send_trans_reply(inbuf, outbuf, NULL, 0, NULL, 0, False);
 212                 return True;
 213         }
 214         return False;
 215 }
 216
 217
 218 /****************************************************************************
 219  SetNamedPipeHandleState
 220 ****************************************************************************/
 221
 222 static BOOL api_SNPHS(const char *inbuf,
 223                         char *outbuf,
 224                         smb_np_struct *p,
 225                         char *param,
 226                         int param_len)
 227 {
 228         uint16 id;
 229
 230         if (!param || param_len < 2)
 231                 return False;
 232
 233         id = SVAL(param,0);
 234         DEBUG(4,("SetNamedPipeHandleState to code %x\n", id));
 235
 236         if (set_rpc_pipe_hnd_state(p, id)) {
 237                 /* now send the reply */
 238                 send_trans_reply(inbuf, outbuf, NULL, 0, NULL, 0, False);
 239                 return True;
 240         }
 241         return False;
 242 }
 243
 244
 245 /****************************************************************************
 246  When no reply is generated, indicate unsupported.
 247  ****************************************************************************/
 248
 249 static BOOL api_no_reply(const char *inbuf, char *outbuf, int max_rdata_len)
 250 {
 251         char rparam[4];
 252
 253         /* unsupported */
 254         SSVAL(rparam,0,NERR_notsupported);
 255         SSVAL(rparam,2,0); /* converter word */
 256
 257         DEBUG(3,("Unsupported API fd command\n"));
 258
 259         /* now send the reply */
 260         send_trans_reply(inbuf, outbuf, rparam, 4, NULL, 0, False);
 261
 262         return -1;
 263 }
 264
 265 /****************************************************************************
 266  Handle remote api calls delivered to a named pipe already opened.
 267  ****************************************************************************/
 268
 269 static int api_fd_reply(connection_struct *conn,
 270                         uint16 vuid,
 271                         const char *inbuf,
 272                         char *outbuf,
 273                         uint16 *setup,
 274                         char *data,
 275                         char *params,
 276                         int suwcnt,
 277                         int tdscnt,
 278                         int tpscnt,
 279                         int mdrcnt,
 280                         int mprcnt)
 281 {
 282         BOOL reply = False;
 283         smb_np_struct *p = NULL;
 284         int pnum;
 285         int subcommand;
 286
 287         DEBUG(5,("api_fd_reply\n"));
 288
 289         /* First find out the name of this file. */
 290         if (suwcnt != 2) {
 291                 DEBUG(0,("Unexpected named pipe transaction.\n"));
 292                 return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
 293         }
 294
 295         /* Get the file handle and hence the file name. */
 296         /*
 297          * NB. The setup array has already been transformed
 298          * via SVAL and so is in gost byte order.
 299          */
 300         pnum = ((int)setup[1]) & 0xFFFF;
 301         subcommand = ((int)setup[0]) & 0xFFFF;
 302
 303         if(!(p = get_rpc_pipe(pnum))) {
 304                 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
 305                         /* Win9x does this call with a unicode pipe name, not a pnum. */
 306                         /* Just return success for now... */
 307                         DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
 308                         send_trans_reply(inbuf, outbuf, NULL, 0, NULL, 0, False);
 309                         return -1;
 310                 }
 311
 312                 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
 313                 return ERROR_NT(NT_STATUS_INVALID_HANDLE);
 314         }
 315
 316         if (vuid != p->vuid) {
 317                 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
 318                           "expected %d\n", pnum, vuid, p->vuid));
 319                 return ERROR_NT(NT_STATUS_INVALID_HANDLE);
 320         }
 321
 322         DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n", subcommand, p->name, pnum));
 323
 324         /* record maximum data length that can be transmitted in an SMBtrans */
 325         p->max_trans_reply = mdrcnt;
 326
 327         DEBUG(10,("api_fd_reply: p:%p max_trans_reply: %d\n", p, p->max_trans_reply));
 328
 329         switch (subcommand) {
 330         case TRANSACT_DCERPCCMD:
 331                 /* dce/rpc command */
 332                 reply = write_to_pipe(p, data, tdscnt);
 333                 if (reply)
 334                         reply = api_rpc_trans_reply(inbuf, outbuf, p);
 335                 break;
 336         case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
 337                 /* Wait Named Pipe Handle state */
 338                 reply = api_WNPHS(inbuf, outbuf, p, params, tpscnt);
 339                 break;
 340         case TRANSACT_SETNAMEDPIPEHANDLESTATE:
 341                 /* Set Named Pipe Handle state */
 342                 reply = api_SNPHS(inbuf, outbuf, p, params, tpscnt);
 343                 break;
 344         default:
 345                 return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
 346         }
 347
 348         if (!reply)
 349                 return api_no_reply(inbuf, outbuf, mdrcnt);
 350
 351         return -1;
 352 }
 353
 354 /****************************************************************************
 355  Handle named pipe commands.
 356 ****************************************************************************/
 357
 358 static int named_pipe(connection_struct *conn,
 359                         uint16 vuid,
 360                         const char *inbuf,
 361                         char *outbuf,
 362                         char *name,
 363                         uint16 *setup,
 364                         char *data,
 365                         char *params,
 366                         int suwcnt,
 367                         int tdscnt,
 368                         int tpscnt,
 369                         int msrcnt,
 370                         int mdrcnt,
 371                         int mprcnt)
 372 {
 373         DEBUG(3,("named pipe command on <%s> name\n", name));
 374
 375         if (strequal(name,"LANMAN")) {
 376                 return api_reply(conn,
 377                                 vuid,
 378                                 inbuf,
 379                                 outbuf,
 380                                 data,
 381                                 params,
 382                                 tdscnt,
 383                                 tpscnt,
 384                                 mdrcnt,
 385                                 mprcnt);
 386         }
 387
 388         if (strequal(name,"WKSSVC") ||
 389             strequal(name,"SRVSVC") ||
 390             strequal(name,"WINREG") ||
 391             strequal(name,"SAMR") ||
 392             strequal(name,"LSARPC")) {
 393                 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
 394                 return api_fd_reply(conn,
 395                                         vuid,
 396                                         inbuf,
 397                                         outbuf,
 398                                         setup,
 399                                         data,
 400                                         params,
 401                                         suwcnt,
 402                                         tdscnt,
 403                                         tpscnt,
 404                                         mdrcnt,
 405                                         mprcnt);
 406         }
 407
 408         if (strlen(name) < 1) {
 409                 return api_fd_reply(conn,
 410                                         vuid,
 411                                         inbuf,
 412                                         outbuf,
 413                                         setup,
 414                                         data,
 415                                         params,
 416                                         suwcnt,
 417                                         tdscnt,
 418                                         tpscnt,
 419                                         mdrcnt,
 420                                         mprcnt);
 421         }
 422
 423         if (setup)
 424                 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n", (int)setup[0],(int)setup[1]));
 425
 426         return 0;
 427 }
 428
 429 static NTSTATUS handle_trans(connection_struct *conn,
 430                                 struct trans_state *state,
 431                                 const char *inbuf,
 432                                 char *outbuf,
 433                                 int *outsize)
 434 {
 435         char *local_machine_name;
 436         int name_offset = 0;
 437
 438         DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
 439                  state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
 440                  (unsigned int)state->setup_count));
 441
 442         /*
 443          * WinCE wierdness....
 444          */
 445
 446         local_machine_name = talloc_asprintf(state, "\\%s\\",
 447                                              get_local_machine_name());
 448
 449         if (local_machine_name == NULL) {
 450                 return NT_STATUS_NO_MEMORY;
 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                 return NT_STATUS_NOT_SUPPORTED;
 461         }
 462
 463         name_offset += strlen("\\PIPE");
 464
 465         /* Win9x weirdness.  When talking to a unicode server Win9x
 466            only sends \PIPE instead of \PIPE\ */
 467
 468         if (state->name[name_offset] == '\\')
 469                 name_offset++;
 470
 471         DEBUG(5,("calling named_pipe\n"));
 472         *outsize = named_pipe(conn,
 473                                 state->vuid,
 474                                 inbuf,
 475                                 outbuf,
 476                                 state->name+name_offset,
 477                                 state->setup,state->data,
 478                                 state->param,
 479                                 state->setup_count,state->total_data,
 480                                 state->total_param,
 481                                 state->max_setup_return,
 482                                 state->max_data_return,
 483                                 state->max_param_return);
 484
 485         if (*outsize == 0) {
 486                 return NT_STATUS_NOT_SUPPORTED;
 487         }
 488
 489         if (state->close_on_completion)
 490                 close_cnum(conn,state->vuid);
 491
 492         return NT_STATUS_OK;
 493 }
 494
 495 /****************************************************************************
 496  Reply to a SMBtrans.
 497  ****************************************************************************/
 498
 499 int reply_trans(connection_struct *conn,
 500                 char *inbuf,
 501                 char *outbuf,
 502                 int size,
 503                 int bufsize)
 504 {
 505         int outsize = 0;
 506         unsigned int dsoff = SVAL(inbuf, smb_dsoff);
 507         unsigned int dscnt = SVAL(inbuf, smb_dscnt);
 508         unsigned int psoff = SVAL(inbuf, smb_psoff);
 509         unsigned int pscnt = SVAL(inbuf, smb_pscnt);
 510         struct trans_state *state;
 511         NTSTATUS result;
 512
 513         START_PROFILE(SMBtrans);
 514
 515         result = allow_new_trans(conn->pending_trans, SVAL(inbuf, smb_mid));
 516         if (!NT_STATUS_IS_OK(result)) {
 517                 DEBUG(2, ("Got invalid trans request: %s\n",
 518                           nt_errstr(result)));
 519                 END_PROFILE(SMBtrans);
 520                 return ERROR_NT(result);
 521         }
 522
 523         if ((state = TALLOC_P(conn->mem_ctx, struct trans_state)) == NULL) {
 524                 DEBUG(0, ("talloc failed\n"));
 525                 END_PROFILE(SMBtrans);
 526                 return ERROR_NT(NT_STATUS_NO_MEMORY);
 527         }
 528
 529         state->cmd = SMBtrans;
 530
 531         state->mid = SVAL(inbuf, smb_mid);
 532         state->vuid = SVAL(inbuf, smb_uid);
 533         state->setup_count = CVAL(inbuf, smb_suwcnt);
 534         state->setup = NULL;
 535         state->total_param = SVAL(inbuf, smb_tpscnt);
 536         state->param = NULL;
 537         state->total_data = SVAL(inbuf, smb_tdscnt);
 538         state->data = NULL;
 539         state->max_param_return = SVAL(inbuf, smb_mprcnt);
 540         state->max_data_return = SVAL(inbuf, smb_mdrcnt);
 541         state->max_setup_return = CVAL(inbuf, smb_msrcnt);
 542         state->close_on_completion = BITSETW(inbuf+smb_vwv5,0);
 543         state->one_way = BITSETW(inbuf+smb_vwv5,1);
 544
 545         memset(state->name, '\0',sizeof(state->name));
 546         srvstr_pull_buf(inbuf, state->name, smb_buf(inbuf),
 547                         sizeof(state->name), STR_TERMINATE);
 548
 549         if ((dscnt > state->total_data) || (pscnt > state->total_param))
 550                 goto bad_param;
 551
 552         if (state->total_data)  {
 553                 /* Can't use talloc here, the core routines do realloc on the
 554                  * params and data. Out of paranoia, 100 bytes too many. */
 555                 state->data = (char *)SMB_MALLOC(state->total_data+100);
 556                 if (state->data == NULL) {
 557                         DEBUG(0,("reply_trans: data malloc fail for %u "
 558                                  "bytes !\n", (unsigned int)state->total_data));
 559                         TALLOC_FREE(state);
 560                         END_PROFILE(SMBtrans);
 561                         return(ERROR_DOS(ERRDOS,ERRnomem));
 562                 }
 563                 /* null-terminate the slack space */
 564                 memset(&state->data[state->total_data], 0, 100);
 565                 if ((dsoff+dscnt < dsoff) || (dsoff+dscnt < dscnt))
 566                         goto bad_param;
 567                 if ((smb_base(inbuf)+dsoff+dscnt > inbuf + size) ||
 568                     (smb_base(inbuf)+dsoff+dscnt < smb_base(inbuf)))
 569                         goto bad_param;
 570
 571                 memcpy(state->data,smb_base(inbuf)+dsoff,dscnt);
 572         }
 573
 574         if (state->total_param) {
 575                 /* Can't use talloc here, the core routines do realloc on the
 576                  * params and data. Out of paranoia, 100 bytes too many */
 577                 state->param = (char *)SMB_MALLOC(state->total_param+100);
 578                 if (state->param == NULL) {
 579                         DEBUG(0,("reply_trans: param malloc fail for %u "
 580                                  "bytes !\n", (unsigned int)state->total_param));
 581                         SAFE_FREE(state->data);
 582                         TALLOC_FREE(state);
 583                         END_PROFILE(SMBtrans);
 584                         return(ERROR_DOS(ERRDOS,ERRnomem));
 585                 }
 586                 /* null-terminate the slack space */
 587                 memset(&state->param[state->total_param], 0, 100);
 588                 if ((psoff+pscnt < psoff) || (psoff+pscnt < pscnt))
 589                         goto bad_param;
 590                 if ((smb_base(inbuf)+psoff+pscnt > inbuf + size) ||
 591                     (smb_base(inbuf)+psoff+pscnt < smb_base(inbuf)))
 592                         goto bad_param;
 593
 594                 memcpy(state->param,smb_base(inbuf)+psoff,pscnt);
 595         }
 596
 597         state->received_data  = dscnt;
 598         state->received_param = pscnt;
 599
 600         if (state->setup_count) {
 601                 unsigned int i;
 602                 if((state->setup = TALLOC_ARRAY(
 603                             state, uint16, state->setup_count)) == NULL) {
 604                         DEBUG(0,("reply_trans: setup malloc fail for %u "
 605                                  "bytes !\n", (unsigned int)
 606                                  (state->setup_count * sizeof(uint16))));
 607                         TALLOC_FREE(state);
 608                         END_PROFILE(SMBtrans);
 609                         return(ERROR_DOS(ERRDOS,ERRnomem));
 610                 }
 611                 if (inbuf+smb_vwv14+(state->setup_count*SIZEOFWORD) >
 612                     inbuf + size)
 613                         goto bad_param;
 614                 if ((smb_vwv14+(state->setup_count*SIZEOFWORD) < smb_vwv14) ||
 615                     (smb_vwv14+(state->setup_count*SIZEOFWORD) <
 616                      (state->setup_count*SIZEOFWORD)))
 617                         goto bad_param;
 618
 619                 for (i=0;i<state->setup_count;i++)
 620                         state->setup[i] = SVAL(inbuf,smb_vwv14+i*SIZEOFWORD);
 621         }
 622
 623         state->received_param = pscnt;
 624
 625         if ((state->received_param == state->total_param) &&
 626             (state->received_data == state->total_data)) {
 627
 628                 result = handle_trans(conn, state, inbuf, outbuf, &outsize);
 629
 630                 SAFE_FREE(state->data);
 631                 SAFE_FREE(state->param);
 632                 TALLOC_FREE(state);
 633
 634                 if (!NT_STATUS_IS_OK(result)) {
 635                         END_PROFILE(SMBtrans);
 636                         return ERROR_NT(result);
 637                 }
 638
 639                 if (outsize == 0) {
 640                         END_PROFILE(SMBtrans);
 641                         return ERROR_NT(NT_STATUS_INTERNAL_ERROR);
 642                 }
 643
 644                 END_PROFILE(SMBtrans);
 645                 return outsize;
 646         }
 647
 648         DLIST_ADD(conn->pending_trans, state);
 649
 650         /* We need to send an interim response then receive the rest
 651            of the parameter/data bytes */
 652         outsize = set_message(inbuf,outbuf,0,0,True);
 653         show_msg(outbuf);
 654         END_PROFILE(SMBtrans);
 655         return outsize;
 656
 657   bad_param:
 658
 659         DEBUG(0,("reply_trans: invalid trans parameters\n"));
 660         SAFE_FREE(state->data);
 661         SAFE_FREE(state->param);
 662         TALLOC_FREE(state);
 663         END_PROFILE(SMBtrans);
 664         return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
 665 }
 666
 667 /****************************************************************************
 668  Reply to a secondary SMBtrans.
 669  ****************************************************************************/
 670
 671 int reply_transs(connection_struct *conn, char *inbuf,char *outbuf,
 672                  int size, int bufsize)
 673 {
 674         int outsize = 0;
 675         unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
 676         struct trans_state *state;
 677         NTSTATUS result;
 678
 679         START_PROFILE(SMBtranss);
 680
 681         show_msg(inbuf);
 682
 683         for (state = conn->pending_trans; state != NULL;
 684              state = state->next) {
 685                 if (state->mid == SVAL(inbuf,smb_mid)) {
 686                         break;
 687                 }
 688         }
 689
 690         if ((state == NULL) || (state->cmd != SMBtrans)) {
 691                 END_PROFILE(SMBtranss);
 692                 return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
 693         }
 694
 695         /* Revise total_params and total_data in case they have changed
 696          * downwards */
 697
 698         if (SVAL(inbuf, smb_vwv0) < state->total_param)
 699                 state->total_param = SVAL(inbuf,smb_vwv0);
 700         if (SVAL(inbuf, smb_vwv1) < state->total_data)
 701                 state->total_data = SVAL(inbuf,smb_vwv1);
 702
 703         pcnt = SVAL(inbuf, smb_spscnt);
 704         poff = SVAL(inbuf, smb_spsoff);
 705         pdisp = SVAL(inbuf, smb_spsdisp);
 706
 707         dcnt = SVAL(inbuf, smb_sdscnt);
 708         doff = SVAL(inbuf, smb_sdsoff);
 709         ddisp = SVAL(inbuf, smb_sdsdisp);
 710
 711         state->received_param += pcnt;
 712         state->received_data += dcnt;
 713
 714         if ((state->received_data > state->total_data) ||
 715             (state->received_param > state->total_param))
 716                 goto bad_param;
 717
 718         if (pcnt) {
 719                 if (pdisp+pcnt > state->total_param)
 720                         goto bad_param;
 721                 if ((pdisp+pcnt < pdisp) || (pdisp+pcnt < pcnt))
 722                         goto bad_param;
 723                 if (pdisp > state->total_param)
 724                         goto bad_param;
 725                 if ((smb_base(inbuf) + poff + pcnt > inbuf + size) ||
 726                     (smb_base(inbuf) + poff + pcnt < smb_base(inbuf)))
 727                         goto bad_param;
 728                 if (state->param + pdisp < state->param)
 729                         goto bad_param;
 730
 731                 memcpy(state->param+pdisp,smb_base(inbuf)+poff,
 732                        pcnt);
 733         }
 734
 735         if (dcnt) {
 736                 if (ddisp+dcnt > state->total_data)
 737                         goto bad_param;
 738                 if ((ddisp+dcnt < ddisp) || (ddisp+dcnt < dcnt))
 739                         goto bad_param;
 740                 if (ddisp > state->total_data)
 741                         goto bad_param;
 742                 if ((smb_base(inbuf) + doff + dcnt > inbuf + size) ||
 743                     (smb_base(inbuf) + doff + dcnt < smb_base(inbuf)))
 744                         goto bad_param;
 745                 if (state->data + ddisp < state->data)
 746                         goto bad_param;
 747
 748                 memcpy(state->data+ddisp, smb_base(inbuf)+doff,
 749                        dcnt);
 750         }
 751
 752         if ((state->received_param < state->total_param) ||
 753             (state->received_data < state->total_data)) {
 754                 END_PROFILE(SMBtranss);
 755                 return -1;
 756         }
 757
 758         /* construct_reply_common has done us the favor to pre-fill the
 759          * command field with SMBtranss which is wrong :-)
 760          */
 761         SCVAL(outbuf,smb_com,SMBtrans);
 762
 763         result = handle_trans(conn, state, inbuf, outbuf, &outsize);
 764
 765         DLIST_REMOVE(conn->pending_trans, state);
 766         SAFE_FREE(state->data);
 767         SAFE_FREE(state->param);
 768         TALLOC_FREE(state);
 769
 770         if ((outsize == 0) || !NT_STATUS_IS_OK(result)) {
 771                 END_PROFILE(SMBtranss);
 772                 return(ERROR_DOS(ERRSRV,ERRnosupport));
 773         }
 774
 775         END_PROFILE(SMBtranss);
 776         return(outsize);
 777
 778   bad_param:
 779
 780         DEBUG(0,("reply_transs: invalid trans parameters\n"));
 781         DLIST_REMOVE(conn->pending_trans, state);
 782         SAFE_FREE(state->data);
 783         SAFE_FREE(state->param);
 784         TALLOC_FREE(state);
 785         END_PROFILE(SMBtranss);
 786         return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
 787 }