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