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