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);
  50
  51         if(param_len < 0)
  52                 param_len = 0;
  53
  54         if(data_len < 0)
  55                 data_len = 0;
  56
  57         DEBUG(5,("copy_trans_params_and_data: params[%d..%d] data[%d..%d] (align %d)\n",
  58                         param_offset, param_offset + param_len,
  59                         data_offset , data_offset  + data_len,
  60                         align));
  61
  62         *copy_into = '\0';
  63
  64         copy_into += 1;
  65
  66         if (param_len)
  67                 memcpy(copy_into, &rparam[param_offset], param_len);
  68
  69         copy_into += param_len;
  70         if (align) {
  71                 memset(copy_into, '\0', align);
  72         }
  73
  74         copy_into += align;
  75
  76         if (data_len )
  77                 memcpy(copy_into, &rdata[data_offset], data_len);
  78 }
  79
  80 /****************************************************************************
  81  Send a trans reply.
  82  ****************************************************************************/
  83
  84 void send_trans_reply(struct smb_request *req,
  85                       char *rparam, int rparam_len,
  86                       char *rdata, int rdata_len,
  87                       bool buffer_too_large)
  88 {
  89         int this_ldata,this_lparam;
  90         int tot_data_sent = 0;
  91         int tot_param_sent = 0;
  92         int align;
  93
  94         int ldata  = rdata  ? rdata_len : 0;
  95         int lparam = rparam ? rparam_len : 0;
  96
  97         if (buffer_too_large)
  98                 DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
  99
 100         this_lparam = MIN(lparam,max_send - 500); /* hack */
 101         this_ldata  = MIN(ldata,max_send - (500+this_lparam));
 102
 103         align = ((this_lparam)%4);
 104
 105         reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
 106
 107         copy_trans_params_and_data((char *)req->outbuf, align,
 108                                 rparam, tot_param_sent, this_lparam,
 109                                 rdata, tot_data_sent, this_ldata);
 110
 111         SSVAL(req->outbuf,smb_vwv0,lparam);
 112         SSVAL(req->outbuf,smb_vwv1,ldata);
 113         SSVAL(req->outbuf,smb_vwv3,this_lparam);
 114         SSVAL(req->outbuf,smb_vwv4,smb_offset(smb_buf(req->outbuf)+1,
 115                                               req->outbuf));
 116         SSVAL(req->outbuf,smb_vwv5,0);
 117         SSVAL(req->outbuf,smb_vwv6,this_ldata);
 118         SSVAL(req->outbuf,smb_vwv7,smb_offset(smb_buf(req->outbuf)+1+
 119                                               this_lparam+align,
 120                                               req->outbuf));
 121         SSVAL(req->outbuf,smb_vwv8,0);
 122         SSVAL(req->outbuf,smb_vwv9,0);
 123
 124         if (buffer_too_large) {
 125                 error_packet_set((char *)req->outbuf,
 126                                  ERRDOS, ERRmoredata,
 127                                  STATUS_BUFFER_OVERFLOW,
 128                                  __LINE__, __FILE__);
 129         }
 130
 131         show_msg((char *)req->outbuf);
 132         if (!send_smb(smbd_server_fd(),(char *)req->outbuf))
 133                 exit_server_cleanly("send_trans_reply: send_smb failed.");
 134
 135         TALLOC_FREE(req->outbuf);
 136
 137         tot_data_sent = this_ldata;
 138         tot_param_sent = this_lparam;
 139
 140         while (tot_data_sent < ldata || tot_param_sent < lparam)
 141         {
 142                 this_lparam = MIN(lparam-tot_param_sent, max_send - 500); /* hack */
 143                 this_ldata  = MIN(ldata -tot_data_sent, max_send - (500+this_lparam));
 144
 145                 if(this_lparam < 0)
 146                         this_lparam = 0;
 147
 148                 if(this_ldata < 0)
 149                         this_ldata = 0;
 150
 151                 align = (this_lparam%4);
 152
 153                 reply_outbuf(req, 10, 1+this_ldata+this_lparam+align);
 154
 155                 copy_trans_params_and_data((char *)req->outbuf, align,
 156                                            rparam, tot_param_sent, this_lparam,
 157                                            rdata, tot_data_sent, this_ldata);
 158
 159                 SSVAL(req->outbuf,smb_vwv3,this_lparam);
 160                 SSVAL(req->outbuf,smb_vwv4,smb_offset(smb_buf(req->outbuf)+1,
 161                                                       req->outbuf));
 162                 SSVAL(req->outbuf,smb_vwv5,tot_param_sent);
 163                 SSVAL(req->outbuf,smb_vwv6,this_ldata);
 164                 SSVAL(req->outbuf,smb_vwv7,smb_offset(smb_buf(req->outbuf)+1+
 165                                                       this_lparam+align,
 166                                                       req->outbuf));
 167                 SSVAL(req->outbuf,smb_vwv8,tot_data_sent);
 168                 SSVAL(req->outbuf,smb_vwv9,0);
 169
 170                 if (buffer_too_large) {
 171                         error_packet_set((char *)req->outbuf,
 172                                          ERRDOS, ERRmoredata,
 173                                          STATUS_BUFFER_OVERFLOW,
 174                                          __LINE__, __FILE__);
 175                 }
 176
 177                 show_msg((char *)req->outbuf);
 178                 if (!send_smb(smbd_server_fd(), (char *)req->outbuf))
 179                         exit_server_cleanly("send_trans_reply: send_smb failed.");
 180
 181                 tot_data_sent  += this_ldata;
 182                 tot_param_sent += this_lparam;
 183                 TALLOC_FREE(req->outbuf);
 184         }
 185 }
 186
 187 /****************************************************************************
 188  Start the first part of an RPC reply which began with an SMBtrans request.
 189 ****************************************************************************/
 190
 191 static void api_rpc_trans_reply(struct smb_request *req, smb_np_struct *p)
 192 {
 193         bool is_data_outstanding;
 194         char *rdata = (char *)SMB_MALLOC(p->max_trans_reply);
 195         int data_len;
 196
 197         if(rdata == NULL) {
 198                 DEBUG(0,("api_rpc_trans_reply: malloc fail.\n"));
 199                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 200                 return;
 201         }
 202
 203         if((data_len = read_from_pipe( p, rdata, p->max_trans_reply,
 204                                         &is_data_outstanding)) < 0) {
 205                 SAFE_FREE(rdata);
 206                 api_no_reply(req);
 207                 return;
 208         }
 209
 210         send_trans_reply(req, NULL, 0, rdata, data_len, is_data_outstanding);
 211         SAFE_FREE(rdata);
 212         return;
 213 }
 214
 215 /****************************************************************************
 216  WaitNamedPipeHandleState
 217 ****************************************************************************/
 218
 219 static void api_WNPHS(struct smb_request *req, smb_np_struct *p,
 220                       char *param, int param_len)
 221 {
 222         uint16 priority;
 223
 224         if (!param || param_len < 2) {
 225                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 226                 return;
 227         }
 228
 229         priority = SVAL(param,0);
 230         DEBUG(4,("WaitNamedPipeHandleState priority %x\n", priority));
 231
 232         if (wait_rpc_pipe_hnd_state(p, priority)) {
 233                 /* now send the reply */
 234                 send_trans_reply(req, NULL, 0, NULL, 0, False);
 235                 return;
 236         }
 237         api_no_reply(req);
 238 }
 239
 240
 241 /****************************************************************************
 242  SetNamedPipeHandleState
 243 ****************************************************************************/
 244
 245 static void api_SNPHS(struct smb_request *req, smb_np_struct *p,
 246                       char *param, int param_len)
 247 {
 248         uint16 id;
 249
 250         if (!param || param_len < 2) {
 251                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 252                 return;
 253         }
 254
 255         id = SVAL(param,0);
 256         DEBUG(4,("SetNamedPipeHandleState to code %x\n", id));
 257
 258         if (set_rpc_pipe_hnd_state(p, id)) {
 259                 /* now send the reply */
 260                 send_trans_reply(req, NULL, 0, NULL, 0, False);
 261                 return;
 262         }
 263         api_no_reply(req);
 264 }
 265
 266
 267 /****************************************************************************
 268  When no reply is generated, indicate unsupported.
 269  ****************************************************************************/
 270
 271 static void api_no_reply(struct smb_request *req)
 272 {
 273         char rparam[4];
 274
 275         /* unsupported */
 276         SSVAL(rparam,0,NERR_notsupported);
 277         SSVAL(rparam,2,0); /* converter word */
 278
 279         DEBUG(3,("Unsupported API fd command\n"));
 280
 281         /* now send the reply */
 282         send_trans_reply(req, rparam, 4, NULL, 0, False);
 283
 284         return;
 285 }
 286
 287 /****************************************************************************
 288  Handle remote api calls delivered to a named pipe already opened.
 289  ****************************************************************************/
 290
 291 static void api_fd_reply(connection_struct *conn, uint16 vuid,
 292                          struct smb_request *req,
 293                          uint16 *setup, char *data, char *params,
 294                          int suwcnt, int tdscnt, int tpscnt,
 295                          int mdrcnt, int mprcnt)
 296 {
 297         bool reply = False;
 298         smb_np_struct *p = NULL;
 299         int pnum;
 300         int subcommand;
 301
 302         DEBUG(5,("api_fd_reply\n"));
 303
 304         /* First find out the name of this file. */
 305         if (suwcnt != 2) {
 306                 DEBUG(0,("Unexpected named pipe transaction.\n"));
 307                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 308                 return;
 309         }
 310
 311         /* Get the file handle and hence the file name. */
 312         /*
 313          * NB. The setup array has already been transformed
 314          * via SVAL and so is in gost byte order.
 315          */
 316         pnum = ((int)setup[1]) & 0xFFFF;
 317         subcommand = ((int)setup[0]) & 0xFFFF;
 318
 319         if(!(p = get_rpc_pipe(pnum))) {
 320                 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
 321                         /* Win9x does this call with a unicode pipe name, not a pnum. */
 322                         /* Just return success for now... */
 323                         DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
 324                         send_trans_reply(req, NULL, 0, NULL, 0, False);
 325                         return;
 326                 }
 327
 328                 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
 329                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 330                 return;
 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                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 337                 return;
 338         }
 339
 340         DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n", subcommand, p->name, pnum));
 341
 342         /* record maximum data length that can be transmitted in an SMBtrans */
 343         p->max_trans_reply = mdrcnt;
 344
 345         DEBUG(10,("api_fd_reply: p:%p max_trans_reply: %d\n", p, p->max_trans_reply));
 346
 347         switch (subcommand) {
 348         case TRANSACT_DCERPCCMD:
 349                 /* dce/rpc command */
 350                 reply = write_to_pipe(p, data, tdscnt);
 351                 if (!reply) {
 352                         api_no_reply(req);
 353                         return;
 354                 }
 355                 api_rpc_trans_reply(req, p);
 356                 break;
 357         case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
 358                 /* Wait Named Pipe Handle state */
 359                 api_WNPHS(req, p, params, tpscnt);
 360                 break;
 361         case TRANSACT_SETNAMEDPIPEHANDLESTATE:
 362                 /* Set Named Pipe Handle state */
 363                 api_SNPHS(req, p, params, tpscnt);
 364                 break;
 365         default:
 366                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 367                 return;
 368         }
 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         DEBUG(3,("named pipe command on <%s> name\n", name));
 383
 384         if (strequal(name,"LANMAN")) {
 385                 api_reply(conn, vuid, req,
 386                           data, params,
 387                           tdscnt, tpscnt,
 388                           mdrcnt, mprcnt);
 389                 return;
 390         }
 391
 392         if (strequal(name,"WKSSVC") ||
 393             strequal(name,"SRVSVC") ||
 394             strequal(name,"WINREG") ||
 395             strequal(name,"SAMR") ||
 396             strequal(name,"LSARPC")) {
 397
 398                 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
 399
 400                 api_fd_reply(conn, vuid, req,
 401                              setup, data, params,
 402                              suwcnt, tdscnt, tpscnt,
 403                              mdrcnt, mprcnt);
 404                 return;
 405         }
 406
 407         if (strlen(name) < 1) {
 408                 api_fd_reply(conn, vuid, req,
 409                              setup, data,
 410                              params, suwcnt, tdscnt,
 411                              tpscnt, mdrcnt, mprcnt);
 412                 return;
 413         }
 414
 415         if (setup)
 416                 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
 417                          (int)setup[0],(int)setup[1]));
 418
 419         reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 420         return;
 421 }
 422
 423 static void handle_trans(connection_struct *conn, struct smb_request *req,
 424                          struct trans_state *state)
 425 {
 426         char *local_machine_name;
 427         int name_offset = 0;
 428
 429         DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
 430                  state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
 431                  (unsigned int)state->setup_count));
 432
 433         /*
 434          * WinCE wierdness....
 435          */
 436
 437         local_machine_name = talloc_asprintf(state, "\\%s\\",
 438                                              get_local_machine_name());
 439
 440         if (local_machine_name == NULL) {
 441                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 442                 return;
 443         }
 444
 445         if (strnequal(state->name, local_machine_name,
 446                       strlen(local_machine_name))) {
 447                 name_offset = strlen(local_machine_name)-1;
 448         }
 449
 450         if (!strnequal(&state->name[name_offset], "\\PIPE",
 451                        strlen("\\PIPE"))) {
 452                 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 453                 return;
 454         }
 455
 456         name_offset += strlen("\\PIPE");
 457
 458         /* Win9x weirdness.  When talking to a unicode server Win9x
 459            only sends \PIPE instead of \PIPE\ */
 460
 461         if (state->name[name_offset] == '\\')
 462                 name_offset++;
 463
 464         DEBUG(5,("calling named_pipe\n"));
 465         named_pipe(conn, state->vuid, req,
 466                    state->name+name_offset,
 467                    state->setup,state->data,
 468                    state->param,
 469                    state->setup_count,state->total_data,
 470                    state->total_param,
 471                    state->max_setup_return,
 472                    state->max_data_return,
 473                    state->max_param_return);
 474
 475         if (state->close_on_completion)
 476                 close_cnum(conn,state->vuid);
 477
 478         return;
 479 }
 480
 481 /****************************************************************************
 482  Reply to a SMBtrans.
 483  ****************************************************************************/
 484
 485 void reply_trans(connection_struct *conn, struct smb_request *req)
 486 {
 487         unsigned int dsoff;
 488         unsigned int dscnt;
 489         unsigned int psoff;
 490         unsigned int pscnt;
 491         struct trans_state *state;
 492         NTSTATUS result;
 493         int size;
 494
 495         START_PROFILE(SMBtrans);
 496
 497         if (req->wct < 14) {
 498                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 499                 END_PROFILE(SMBtrans);
 500                 return;
 501         }
 502
 503         size = smb_len(req->inbuf) + 4;
 504         dsoff = SVAL(req->inbuf, smb_dsoff);
 505         dscnt = SVAL(req->inbuf, smb_dscnt);
 506         psoff = SVAL(req->inbuf, smb_psoff);
 507         pscnt = SVAL(req->inbuf, smb_pscnt);
 508
 509         result = allow_new_trans(conn->pending_trans, req->mid);
 510         if (!NT_STATUS_IS_OK(result)) {
 511                 DEBUG(2, ("Got invalid trans request: %s\n",
 512                           nt_errstr(result)));
 513                 reply_nterror(req, result);
 514                 END_PROFILE(SMBtrans);
 515                 return;
 516         }
 517
 518         if ((state = TALLOC_P(conn->mem_ctx, struct trans_state)) == NULL) {
 519                 DEBUG(0, ("talloc failed\n"));
 520                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 521                 END_PROFILE(SMBtrans);
 522                 return;
 523         }
 524
 525         state->cmd = SMBtrans;
 526
 527         state->mid = req->mid;
 528         state->vuid = req->vuid;
 529         state->setup_count = CVAL(req->inbuf, smb_suwcnt);
 530         state->setup = NULL;
 531         state->total_param = SVAL(req->inbuf, smb_tpscnt);
 532         state->param = NULL;
 533         state->total_data = SVAL(req->inbuf, smb_tdscnt);
 534         state->data = NULL;
 535         state->max_param_return = SVAL(req->inbuf, smb_mprcnt);
 536         state->max_data_return = SVAL(req->inbuf, smb_mdrcnt);
 537         state->max_setup_return = CVAL(req->inbuf, smb_msrcnt);
 538         state->close_on_completion = BITSETW(req->inbuf+smb_vwv5,0);
 539         state->one_way = BITSETW(req->inbuf+smb_vwv5,1);
 540
 541         memset(state->name, '\0',sizeof(state->name));
 542         srvstr_pull_buf(req->inbuf, req->flags2, state->name,
 543                         smb_buf(req->inbuf), sizeof(state->name),
 544                         STR_TERMINATE);
 545
 546         if ((dscnt > state->total_data) || (pscnt > state->total_param))
 547                 goto bad_param;
 548
 549         if (state->total_data)  {
 550                 /* Can't use talloc here, the core routines do realloc on the
 551                  * params and data. Out of paranoia, 100 bytes too many. */
 552                 state->data = (char *)SMB_MALLOC(state->total_data+100);
 553                 if (state->data == NULL) {
 554                         DEBUG(0,("reply_trans: data malloc fail for %u "
 555                                  "bytes !\n", (unsigned int)state->total_data));
 556                         TALLOC_FREE(state);
 557                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 558                         END_PROFILE(SMBtrans);
 559                         return;
 560                 }
 561                 /* null-terminate the slack space */
 562                 memset(&state->data[state->total_data], 0, 100);
 563                 if ((dsoff+dscnt < dsoff) || (dsoff+dscnt < dscnt))
 564                         goto bad_param;
 565                 if ((smb_base(req->inbuf)+dsoff+dscnt
 566                      > (char *)req->inbuf + size) ||
 567                     (smb_base(req->inbuf)+dsoff+dscnt < smb_base(req->inbuf)))
 568                         goto bad_param;
 569
 570                 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
 571         }
 572
 573         if (state->total_param) {
 574                 /* Can't use talloc here, the core routines do realloc on the
 575                  * params and data. Out of paranoia, 100 bytes too many */
 576                 state->param = (char *)SMB_MALLOC(state->total_param+100);
 577                 if (state->param == NULL) {
 578                         DEBUG(0,("reply_trans: param malloc fail for %u "
 579                                  "bytes !\n", (unsigned int)state->total_param));
 580                         SAFE_FREE(state->data);
 581                         TALLOC_FREE(state);
 582                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 583                         END_PROFILE(SMBtrans);
 584                         return;
 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(req->inbuf)+psoff+pscnt
 591                      > (char *)req->inbuf + size) ||
 592                     (smb_base(req->inbuf)+psoff+pscnt < smb_base(req->inbuf)))
 593                         goto bad_param;
 594
 595                 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
 596         }
 597
 598         state->received_data  = dscnt;
 599         state->received_param = pscnt;
 600
 601         if (state->setup_count) {
 602                 unsigned int i;
 603                 if((state->setup = TALLOC_ARRAY(
 604                             state, uint16, state->setup_count)) == NULL) {
 605                         DEBUG(0,("reply_trans: setup malloc fail for %u "
 606                                  "bytes !\n", (unsigned int)
 607                                  (state->setup_count * sizeof(uint16))));
 608                         SAFE_FREE(state->data);
 609                         SAFE_FREE(state->param);
 610                         TALLOC_FREE(state);
 611                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 612                         END_PROFILE(SMBtrans);
 613                         return;
 614                 }
 615                 if (req->inbuf+smb_vwv14+(state->setup_count*SIZEOFWORD) >
 616                     req->inbuf + size)
 617                         goto bad_param;
 618                 if ((smb_vwv14+(state->setup_count*SIZEOFWORD) < smb_vwv14) ||
 619                     (smb_vwv14+(state->setup_count*SIZEOFWORD) <
 620                      (state->setup_count*SIZEOFWORD)))
 621                         goto bad_param;
 622
 623                 for (i=0;i<state->setup_count;i++)
 624                         state->setup[i] = SVAL(req->inbuf,
 625                                                smb_vwv14+i*SIZEOFWORD);
 626         }
 627
 628         state->received_param = pscnt;
 629
 630         if ((state->received_param != state->total_param) ||
 631             (state->received_data != state->total_data)) {
 632                 DLIST_ADD(conn->pending_trans, state);
 633
 634                 /* We need to send an interim response then receive the rest
 635                    of the parameter/data bytes */
 636                 reply_outbuf(req, 0, 0);
 637                 show_msg((char *)req->outbuf);
 638                 END_PROFILE(SMBtrans);
 639                 return;
 640         }
 641
 642         handle_trans(conn, req, state);
 643
 644         SAFE_FREE(state->data);
 645         SAFE_FREE(state->param);
 646         TALLOC_FREE(state);
 647
 648         END_PROFILE(SMBtrans);
 649         return;
 650
 651   bad_param:
 652
 653         DEBUG(0,("reply_trans: invalid trans parameters\n"));
 654         SAFE_FREE(state->data);
 655         SAFE_FREE(state->param);
 656         TALLOC_FREE(state);
 657         END_PROFILE(SMBtrans);
 658         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 659         return;
 660 }
 661
 662 /****************************************************************************
 663  Reply to a secondary SMBtrans.
 664  ****************************************************************************/
 665
 666 void reply_transs(connection_struct *conn, struct smb_request *req)
 667 {
 668         unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
 669         struct trans_state *state;
 670         int size;
 671
 672         START_PROFILE(SMBtranss);
 673
 674         show_msg((char *)req->inbuf);
 675
 676         if (req->wct < 8) {
 677                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 678                 END_PROFILE(SMBtranss);
 679                 return;
 680         }
 681
 682         for (state = conn->pending_trans; state != NULL;
 683              state = state->next) {
 684                 if (state->mid == req->mid) {
 685                         break;
 686                 }
 687         }
 688
 689         if ((state == NULL) || (state->cmd != SMBtrans)) {
 690                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 691                 END_PROFILE(SMBtranss);
 692                 return;
 693         }
 694
 695         /* Revise total_params and total_data in case they have changed
 696          * downwards */
 697
 698         if (SVAL(req->inbuf, smb_vwv0) < state->total_param)
 699                 state->total_param = SVAL(req->inbuf,smb_vwv0);
 700         if (SVAL(req->inbuf, smb_vwv1) < state->total_data)
 701                 state->total_data = SVAL(req->inbuf,smb_vwv1);
 702
 703         size = smb_len(req->inbuf) + 4;
 704
 705         pcnt = SVAL(req->inbuf, smb_spscnt);
 706         poff = SVAL(req->inbuf, smb_spsoff);
 707         pdisp = SVAL(req->inbuf, smb_spsdisp);
 708
 709         dcnt = SVAL(req->inbuf, smb_sdscnt);
 710         doff = SVAL(req->inbuf, smb_sdsoff);
 711         ddisp = SVAL(req->inbuf, smb_sdsdisp);
 712
 713         state->received_param += pcnt;
 714         state->received_data += dcnt;
 715
 716         if ((state->received_data > state->total_data) ||
 717             (state->received_param > state->total_param))
 718                 goto bad_param;
 719
 720         if (pcnt) {
 721                 if (pdisp+pcnt > state->total_param)
 722                         goto bad_param;
 723                 if ((pdisp+pcnt < pdisp) || (pdisp+pcnt < pcnt))
 724                         goto bad_param;
 725                 if (pdisp > state->total_param)
 726                         goto bad_param;
 727                 if ((smb_base(req->inbuf) + poff + pcnt
 728                      > (char *)req->inbuf + size) ||
 729                     (smb_base(req->inbuf) + poff + pcnt
 730                      < smb_base(req->inbuf)))
 731                         goto bad_param;
 732                 if (state->param + pdisp < state->param)
 733                         goto bad_param;
 734
 735                 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,
 736                        pcnt);
 737         }
 738
 739         if (dcnt) {
 740                 if (ddisp+dcnt > state->total_data)
 741                         goto bad_param;
 742                 if ((ddisp+dcnt < ddisp) || (ddisp+dcnt < dcnt))
 743                         goto bad_param;
 744                 if (ddisp > state->total_data)
 745                         goto bad_param;
 746                 if ((smb_base(req->inbuf) + doff + dcnt
 747                      > (char *)req->inbuf + size) ||
 748                     (smb_base(req->inbuf) + doff + dcnt
 749                      < smb_base(req->inbuf)))
 750                         goto bad_param;
 751                 if (state->data + ddisp < state->data)
 752                         goto bad_param;
 753
 754                 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,
 755                        dcnt);
 756         }
 757
 758         if ((state->received_param < state->total_param) ||
 759             (state->received_data < state->total_data)) {
 760                 END_PROFILE(SMBtranss);
 761                 return;
 762         }
 763
 764         /*
 765          * construct_reply_common will copy smb_com from inbuf to
 766          * outbuf. SMBtranss is wrong here.
 767          */
 768         SCVAL(req->inbuf,smb_com,SMBtrans);
 769
 770         handle_trans(conn, req, state);
 771
 772         DLIST_REMOVE(conn->pending_trans, state);
 773         SAFE_FREE(state->data);
 774         SAFE_FREE(state->param);
 775         TALLOC_FREE(state);
 776
 777         END_PROFILE(SMBtranss);
 778         return;
 779
 780   bad_param:
 781
 782         DEBUG(0,("reply_transs: invalid trans parameters\n"));
 783         DLIST_REMOVE(conn->pending_trans, state);
 784         SAFE_FREE(state->data);
 785         SAFE_FREE(state->param);
 786         TALLOC_FREE(state);
 787         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 788         END_PROFILE(SMBtranss);
 789         return;
 790 }