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(connection_struct *conn, 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(connection_struct *conn,
  85                       struct smb_request *req,
  86                       char *rparam, int rparam_len,
  87                       char *rdata, int rdata_len,
  88                       bool buffer_too_large)
  89 {
  90         int this_ldata,this_lparam;
  91         int tot_data_sent = 0;
  92         int tot_param_sent = 0;
  93         int align;
  94
  95         int ldata  = rdata  ? rdata_len : 0;
  96         int lparam = rparam ? rparam_len : 0;
  97
  98         if (buffer_too_large)
  99                 DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
 100
 101         this_lparam = MIN(lparam,max_send - 500); /* hack */
 102         this_ldata  = MIN(ldata,max_send - (500+this_lparam));
 103
 104         align = ((this_lparam)%4);
 105
 106         reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
 107
 108         /*
 109          * We might have SMBtranss in req which was transferred to the outbuf,
 110          * fix that.
 111          */
 112         SCVAL(req->outbuf, smb_com, SMBtrans);
 113
 114         copy_trans_params_and_data((char *)req->outbuf, align,
 115                                 rparam, tot_param_sent, this_lparam,
 116                                 rdata, tot_data_sent, this_ldata);
 117
 118         SSVAL(req->outbuf,smb_vwv0,lparam);
 119         SSVAL(req->outbuf,smb_vwv1,ldata);
 120         SSVAL(req->outbuf,smb_vwv3,this_lparam);
 121         SSVAL(req->outbuf,smb_vwv4,
 122               smb_offset(smb_buf(req->outbuf)+1, req->outbuf));
 123         SSVAL(req->outbuf,smb_vwv5,0);
 124         SSVAL(req->outbuf,smb_vwv6,this_ldata);
 125         SSVAL(req->outbuf,smb_vwv7,
 126               smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
 127                          req->outbuf));
 128         SSVAL(req->outbuf,smb_vwv8,0);
 129         SSVAL(req->outbuf,smb_vwv9,0);
 130
 131         if (buffer_too_large) {
 132                 error_packet_set((char *)req->outbuf, ERRDOS, ERRmoredata,
 133                                  STATUS_BUFFER_OVERFLOW, __LINE__, __FILE__);
 134         }
 135
 136         show_msg((char *)req->outbuf);
 137         if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
 138                           IS_CONN_ENCRYPTED(conn))) {
 139                 exit_server_cleanly("send_trans_reply: srv_send_smb failed.");
 140         }
 141
 142         TALLOC_FREE(req->outbuf);
 143
 144         tot_data_sent = this_ldata;
 145         tot_param_sent = this_lparam;
 146
 147         while (tot_data_sent < ldata || tot_param_sent < lparam)
 148         {
 149                 this_lparam = MIN(lparam-tot_param_sent,
 150                                   max_send - 500); /* hack */
 151                 this_ldata  = MIN(ldata -tot_data_sent,
 152                                   max_send - (500+this_lparam));
 153
 154                 if(this_lparam < 0)
 155                         this_lparam = 0;
 156
 157                 if(this_ldata < 0)
 158                         this_ldata = 0;
 159
 160                 align = (this_lparam%4);
 161
 162                 reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
 163
 164                 /*
 165                  * We might have SMBtranss in req which was transferred to the
 166                  * outbuf, fix that.
 167                  */
 168                 SCVAL(req->outbuf, smb_com, SMBtrans);
 169
 170                 copy_trans_params_and_data((char *)req->outbuf, align,
 171                                            rparam, tot_param_sent, this_lparam,
 172                                            rdata, tot_data_sent, this_ldata);
 173
 174                 SSVAL(req->outbuf,smb_vwv3,this_lparam);
 175                 SSVAL(req->outbuf,smb_vwv4,
 176                       smb_offset(smb_buf(req->outbuf)+1,req->outbuf));
 177                 SSVAL(req->outbuf,smb_vwv5,tot_param_sent);
 178                 SSVAL(req->outbuf,smb_vwv6,this_ldata);
 179                 SSVAL(req->outbuf,smb_vwv7,
 180                       smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
 181                                  req->outbuf));
 182                 SSVAL(req->outbuf,smb_vwv8,tot_data_sent);
 183                 SSVAL(req->outbuf,smb_vwv9,0);
 184
 185                 if (buffer_too_large) {
 186                         error_packet_set((char *)req->outbuf,
 187                                          ERRDOS, ERRmoredata,
 188                                          STATUS_BUFFER_OVERFLOW,
 189                                          __LINE__, __FILE__);
 190                 }
 191
 192                 show_msg((char *)req->outbuf);
 193                 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
 194                                   IS_CONN_ENCRYPTED(conn)))
 195                         exit_server_cleanly("send_trans_reply: srv_send_smb "
 196                                             "failed.");
 197
 198                 tot_data_sent  += this_ldata;
 199                 tot_param_sent += this_lparam;
 200                 TALLOC_FREE(req->outbuf);
 201         }
 202 }
 203
 204 /****************************************************************************
 205  Start the first part of an RPC reply which began with an SMBtrans request.
 206 ****************************************************************************/
 207
 208 static void api_rpc_trans_reply(connection_struct *conn,
 209                                 struct smb_request *req,
 210                                 files_struct *fsp,
 211                                 int max_trans_reply)
 212 {
 213         bool is_data_outstanding;
 214         uint8_t *rdata = SMB_MALLOC_ARRAY(uint8_t, max_trans_reply);
 215         ssize_t data_len;
 216         NTSTATUS status;
 217
 218         if(rdata == NULL) {
 219                 DEBUG(0,("api_rpc_trans_reply: malloc fail.\n"));
 220                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 221                 return;
 222         }
 223
 224         status = np_read(fsp, rdata, max_trans_reply, &data_len,
 225                          &is_data_outstanding);
 226         if (!NT_STATUS_IS_OK(status)) {
 227                 SAFE_FREE(rdata);
 228                 api_no_reply(conn,req);
 229                 return;
 230         }
 231
 232         send_trans_reply(conn, req, NULL, 0, (char *)rdata, data_len,
 233                          is_data_outstanding);
 234         SAFE_FREE(rdata);
 235         return;
 236 }
 237
 238 /****************************************************************************
 239  WaitNamedPipeHandleState
 240 ****************************************************************************/
 241
 242 static void api_WNPHS(connection_struct *conn, struct smb_request *req,
 243                       struct files_struct *fsp, char *param, int param_len)
 244 {
 245         if (!param || param_len < 2) {
 246                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 247                 return;
 248         }
 249
 250         DEBUG(4,("WaitNamedPipeHandleState priority %x\n",
 251                  (int)SVAL(param,0)));
 252
 253         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 254 }
 255
 256
 257 /****************************************************************************
 258  SetNamedPipeHandleState
 259 ****************************************************************************/
 260
 261 static void api_SNPHS(connection_struct *conn, struct smb_request *req,
 262                       struct files_struct *fsp, char *param, int param_len)
 263 {
 264         if (!param || param_len < 2) {
 265                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 266                 return;
 267         }
 268
 269         DEBUG(4,("SetNamedPipeHandleState to code %x\n", (int)SVAL(param,0)));
 270
 271         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 272 }
 273
 274
 275 /****************************************************************************
 276  When no reply is generated, indicate unsupported.
 277  ****************************************************************************/
 278
 279 static void api_no_reply(connection_struct *conn, struct smb_request *req)
 280 {
 281         char rparam[4];
 282
 283         /* unsupported */
 284         SSVAL(rparam,0,NERR_notsupported);
 285         SSVAL(rparam,2,0); /* converter word */
 286
 287         DEBUG(3,("Unsupported API fd command\n"));
 288
 289         /* now send the reply */
 290         send_trans_reply(conn, req, rparam, 4, NULL, 0, False);
 291
 292         return;
 293 }
 294
 295 /****************************************************************************
 296  Handle remote api calls delivered to a named pipe already opened.
 297  ****************************************************************************/
 298
 299 static void api_fd_reply(connection_struct *conn, uint16 vuid,
 300                          struct smb_request *req,
 301                          uint16 *setup, uint8_t *data, char *params,
 302                          int suwcnt, int tdscnt, int tpscnt,
 303                          int mdrcnt, int mprcnt)
 304 {
 305         struct files_struct *fsp;
 306         int pnum;
 307         int subcommand;
 308         NTSTATUS status;
 309
 310         DEBUG(5,("api_fd_reply\n"));
 311
 312         /* First find out the name of this file. */
 313         if (suwcnt != 2) {
 314                 DEBUG(0,("Unexpected named pipe transaction.\n"));
 315                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 316                 return;
 317         }
 318
 319         /* Get the file handle and hence the file name. */
 320         /*
 321          * NB. The setup array has already been transformed
 322          * via SVAL and so is in host byte order.
 323          */
 324         pnum = ((int)setup[1]) & 0xFFFF;
 325         subcommand = ((int)setup[0]) & 0xFFFF;
 326
 327         fsp = file_fsp(req, pnum);
 328
 329         if (!fsp_is_np(fsp)) {
 330                 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
 331                         /* Win9x does this call with a unicode pipe name, not a pnum. */
 332                         /* Just return success for now... */
 333                         DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
 334                         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 335                         return;
 336                 }
 337
 338                 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
 339                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 340                 return;
 341         }
 342
 343         if (vuid != fsp->vuid) {
 344                 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
 345                           "expected %d\n", pnum, vuid, fsp->vuid));
 346                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 347                 return;
 348         }
 349
 350         DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n",
 351                  subcommand, fsp->fsp_name, pnum));
 352
 353         DEBUG(10, ("api_fd_reply: p:%p max_trans_reply: %d\n", fsp, mdrcnt));
 354
 355         switch (subcommand) {
 356         case TRANSACT_DCERPCCMD: {
 357                 /* dce/rpc command */
 358                 ssize_t nwritten;
 359                 status = np_write(fsp, data, tdscnt, &nwritten);
 360                 if (!NT_STATUS_IS_OK(status)) {
 361                         api_no_reply(conn, req);
 362                         return;
 363                 }
 364                 api_rpc_trans_reply(conn, req, fsp, mdrcnt);
 365                 break;
 366         }
 367         case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
 368                 /* Wait Named Pipe Handle state */
 369                 api_WNPHS(conn, req, fsp, params, tpscnt);
 370                 break;
 371         case TRANSACT_SETNAMEDPIPEHANDLESTATE:
 372                 /* Set Named Pipe Handle state */
 373                 api_SNPHS(conn, req, fsp, params, tpscnt);
 374                 break;
 375         default:
 376                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 377                 return;
 378         }
 379 }
 380
 381 /****************************************************************************
 382  Handle named pipe commands.
 383 ****************************************************************************/
 384
 385 static void named_pipe(connection_struct *conn, uint16 vuid,
 386                        struct smb_request *req,
 387                        const char *name, uint16 *setup,
 388                        char *data, char *params,
 389                        int suwcnt, int tdscnt,int tpscnt,
 390                        int msrcnt, int mdrcnt, int mprcnt)
 391 {
 392         DEBUG(3,("named pipe command on <%s> name\n", name));
 393
 394         if (strequal(name,"LANMAN")) {
 395                 api_reply(conn, vuid, req,
 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
 408                 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
 409
 410                 api_fd_reply(conn, vuid, req,
 411                              setup, (uint8_t *)data, params,
 412                              suwcnt, tdscnt, tpscnt,
 413                              mdrcnt, mprcnt);
 414                 return;
 415         }
 416
 417         if (strlen(name) < 1) {
 418                 api_fd_reply(conn, vuid, req,
 419                              setup, (uint8_t *)data,
 420                              params, suwcnt, tdscnt,
 421                              tpscnt, mdrcnt, mprcnt);
 422                 return;
 423         }
 424
 425         if (setup)
 426                 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
 427                          (int)setup[0],(int)setup[1]));
 428
 429         reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 430         return;
 431 }
 432
 433 static void handle_trans(connection_struct *conn, struct smb_request *req,
 434                          struct trans_state *state)
 435 {
 436         char *local_machine_name;
 437         int name_offset = 0;
 438
 439         DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
 440                  state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
 441                  (unsigned int)state->setup_count));
 442
 443         /*
 444          * WinCE wierdness....
 445          */
 446
 447         local_machine_name = talloc_asprintf(state, "\\%s\\",
 448                                              get_local_machine_name());
 449
 450         if (local_machine_name == NULL) {
 451                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 452                 return;
 453         }
 454
 455         if (strnequal(state->name, local_machine_name,
 456                       strlen(local_machine_name))) {
 457                 name_offset = strlen(local_machine_name)-1;
 458         }
 459
 460         if (!strnequal(&state->name[name_offset], "\\PIPE",
 461                        strlen("\\PIPE"))) {
 462                 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 463                 return;
 464         }
 465
 466         name_offset += strlen("\\PIPE");
 467
 468         /* Win9x weirdness.  When talking to a unicode server Win9x
 469            only sends \PIPE instead of \PIPE\ */
 470
 471         if (state->name[name_offset] == '\\')
 472                 name_offset++;
 473
 474         DEBUG(5,("calling named_pipe\n"));
 475         named_pipe(conn, state->vuid, req,
 476                    state->name+name_offset,
 477                    state->setup,state->data,
 478                    state->param,
 479                    state->setup_count,state->total_data,
 480                    state->total_param,
 481                    state->max_setup_return,
 482                    state->max_data_return,
 483                    state->max_param_return);
 484
 485         if (state->close_on_completion) {
 486                 close_cnum(conn,state->vuid);
 487                 req->conn = NULL;
 488         }
 489
 490         return;
 491 }
 492
 493 /****************************************************************************
 494  Reply to a SMBtrans.
 495  ****************************************************************************/
 496
 497 void reply_trans(struct smb_request *req)
 498 {
 499         connection_struct *conn = req->conn;
 500         unsigned int dsoff;
 501         unsigned int dscnt;
 502         unsigned int psoff;
 503         unsigned int pscnt;
 504         struct trans_state *state;
 505         NTSTATUS result;
 506
 507         START_PROFILE(SMBtrans);
 508
 509         if (req->wct < 14) {
 510                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 511                 END_PROFILE(SMBtrans);
 512                 return;
 513         }
 514
 515         dsoff = SVAL(req->vwv+12, 0);
 516         dscnt = SVAL(req->vwv+11, 0);
 517         psoff = SVAL(req->vwv+10, 0);
 518         pscnt = SVAL(req->vwv+9, 0);
 519
 520         result = allow_new_trans(conn->pending_trans, req->mid);
 521         if (!NT_STATUS_IS_OK(result)) {
 522                 DEBUG(2, ("Got invalid trans request: %s\n",
 523                           nt_errstr(result)));
 524                 reply_nterror(req, result);
 525                 END_PROFILE(SMBtrans);
 526                 return;
 527         }
 528
 529         if ((state = TALLOC_P(conn, struct trans_state)) == NULL) {
 530                 DEBUG(0, ("talloc failed\n"));
 531                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 532                 END_PROFILE(SMBtrans);
 533                 return;
 534         }
 535
 536         state->cmd = SMBtrans;
 537
 538         state->mid = req->mid;
 539         state->vuid = req->vuid;
 540         state->setup_count = CVAL(req->vwv+13, 0);
 541         state->setup = NULL;
 542         state->total_param = SVAL(req->vwv+0, 0);
 543         state->param = NULL;
 544         state->total_data = SVAL(req->vwv+1, 0);
 545         state->data = NULL;
 546         state->max_param_return = SVAL(req->vwv+2, 0);
 547         state->max_data_return = SVAL(req->vwv+3, 0);
 548         state->max_setup_return = CVAL(req->vwv+4, 0);
 549         state->close_on_completion = BITSETW(req->vwv+5, 0);
 550         state->one_way = BITSETW(req->vwv+5, 1);
 551
 552         srvstr_pull_req_talloc(state, req, &state->name, req->buf,
 553                                STR_TERMINATE);
 554
 555         if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
 556                         !state->name)
 557                 goto bad_param;
 558
 559         if (state->total_data)  {
 560
 561                 if (trans_oob(state->total_data, 0, dscnt)
 562                     || trans_oob(smb_len(req->inbuf), dsoff, dscnt)) {
 563                         goto bad_param;
 564                 }
 565
 566                 /* Can't use talloc here, the core routines do realloc on the
 567                  * params and data. Out of paranoia, 100 bytes too many. */
 568                 state->data = (char *)SMB_MALLOC(state->total_data+100);
 569                 if (state->data == NULL) {
 570                         DEBUG(0,("reply_trans: data malloc fail for %u "
 571                                  "bytes !\n", (unsigned int)state->total_data));
 572                         TALLOC_FREE(state);
 573                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 574                         END_PROFILE(SMBtrans);
 575                         return;
 576                 }
 577                 /* null-terminate the slack space */
 578                 memset(&state->data[state->total_data], 0, 100);
 579
 580                 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
 581         }
 582
 583         if (state->total_param) {
 584
 585                 if (trans_oob(state->total_param, 0, pscnt)
 586                     || trans_oob(smb_len(req->inbuf), psoff, pscnt)) {
 587                         goto bad_param;
 588                 }
 589
 590                 /* Can't use talloc here, the core routines do realloc on the
 591                  * params and data. Out of paranoia, 100 bytes too many */
 592                 state->param = (char *)SMB_MALLOC(state->total_param+100);
 593                 if (state->param == NULL) {
 594                         DEBUG(0,("reply_trans: param malloc fail for %u "
 595                                  "bytes !\n", (unsigned int)state->total_param));
 596                         SAFE_FREE(state->data);
 597                         TALLOC_FREE(state);
 598                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 599                         END_PROFILE(SMBtrans);
 600                         return;
 601                 }
 602                 /* null-terminate the slack space */
 603                 memset(&state->param[state->total_param], 0, 100);
 604
 605                 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
 606         }
 607
 608         state->received_data  = dscnt;
 609         state->received_param = pscnt;
 610
 611         if (state->setup_count) {
 612                 unsigned int i;
 613
 614                 /*
 615                  * No overflow possible here, state->setup_count is an
 616                  * unsigned int, being filled by a single byte from
 617                  * CVAL(req->vwv+13, 0) above. The cast in the comparison
 618                  * below is not necessary, it's here to clarify things. The
 619                  * validity of req->vwv and req->wct has been checked in
 620                  * init_smb_request already.
 621                  */
 622                 if (state->setup_count + 14 > (unsigned int)req->wct) {
 623                         goto bad_param;
 624                 }
 625
 626                 if((state->setup = TALLOC_ARRAY(
 627                             state, uint16, state->setup_count)) == NULL) {
 628                         DEBUG(0,("reply_trans: setup malloc fail for %u "
 629                                  "bytes !\n", (unsigned int)
 630                                  (state->setup_count * sizeof(uint16))));
 631                         SAFE_FREE(state->data);
 632                         SAFE_FREE(state->param);
 633                         TALLOC_FREE(state);
 634                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 635                         END_PROFILE(SMBtrans);
 636                         return;
 637                 }
 638
 639                 for (i=0;i<state->setup_count;i++) {
 640                         state->setup[i] = SVAL(req->vwv + 14 + i, 0);
 641                 }
 642         }
 643
 644         state->received_param = pscnt;
 645
 646         if ((state->received_param != state->total_param) ||
 647             (state->received_data != state->total_data)) {
 648                 DLIST_ADD(conn->pending_trans, state);
 649
 650                 /* We need to send an interim response then receive the rest
 651                    of the parameter/data bytes */
 652                 reply_outbuf(req, 0, 0);
 653                 show_msg((char *)req->outbuf);
 654                 END_PROFILE(SMBtrans);
 655                 return;
 656         }
 657
 658         handle_trans(conn, req, state);
 659
 660         SAFE_FREE(state->data);
 661         SAFE_FREE(state->param);
 662         TALLOC_FREE(state);
 663
 664         END_PROFILE(SMBtrans);
 665         return;
 666
 667   bad_param:
 668
 669         DEBUG(0,("reply_trans: invalid trans parameters\n"));
 670         SAFE_FREE(state->data);
 671         SAFE_FREE(state->param);
 672         TALLOC_FREE(state);
 673         END_PROFILE(SMBtrans);
 674         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 675         return;
 676 }
 677
 678 /****************************************************************************
 679  Reply to a secondary SMBtrans.
 680  ****************************************************************************/
 681
 682 void reply_transs(struct smb_request *req)
 683 {
 684         connection_struct *conn = req->conn;
 685         unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
 686         struct trans_state *state;
 687
 688         START_PROFILE(SMBtranss);
 689
 690         show_msg((char *)req->inbuf);
 691
 692         if (req->wct < 8) {
 693                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 694                 END_PROFILE(SMBtranss);
 695                 return;
 696         }
 697
 698         for (state = conn->pending_trans; state != NULL;
 699              state = state->next) {
 700                 if (state->mid == req->mid) {
 701                         break;
 702                 }
 703         }
 704
 705         if ((state == NULL) || (state->cmd != SMBtrans)) {
 706                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 707                 END_PROFILE(SMBtranss);
 708                 return;
 709         }
 710
 711         /* Revise total_params and total_data in case they have changed
 712          * downwards */
 713
 714         if (SVAL(req->vwv+0, 0) < state->total_param)
 715                 state->total_param = SVAL(req->vwv+0, 0);
 716         if (SVAL(req->vwv+1, 0) < state->total_data)
 717                 state->total_data = SVAL(req->vwv+1, 0);
 718
 719         pcnt = SVAL(req->vwv+2, 0);
 720         poff = SVAL(req->vwv+3, 0);
 721         pdisp = SVAL(req->vwv+4, 0);
 722
 723         dcnt = SVAL(req->vwv+5, 0);
 724         doff = SVAL(req->vwv+6, 0);
 725         ddisp = SVAL(req->vwv+7, 0);
 726
 727         state->received_param += pcnt;
 728         state->received_data += dcnt;
 729
 730         if ((state->received_data > state->total_data) ||
 731             (state->received_param > state->total_param))
 732                 goto bad_param;
 733
 734         if (pcnt) {
 735                 if (trans_oob(state->total_param, pdisp, pcnt)
 736                     || trans_oob(smb_len(req->inbuf), poff, pcnt)) {
 737                         goto bad_param;
 738                 }
 739                 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,pcnt);
 740         }
 741
 742         if (dcnt) {
 743                 if (trans_oob(state->total_data, ddisp, dcnt)
 744                     || trans_oob(smb_len(req->inbuf), doff, dcnt)) {
 745                         goto bad_param;
 746                 }
 747                 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,dcnt);
 748         }
 749
 750         if ((state->received_param < state->total_param) ||
 751             (state->received_data < state->total_data)) {
 752                 END_PROFILE(SMBtranss);
 753                 return;
 754         }
 755
 756         handle_trans(conn, req, state);
 757
 758         DLIST_REMOVE(conn->pending_trans, state);
 759         SAFE_FREE(state->data);
 760         SAFE_FREE(state->param);
 761         TALLOC_FREE(state);
 762
 763         END_PROFILE(SMBtranss);
 764         return;
 765
 766   bad_param:
 767
 768         DEBUG(0,("reply_transs: invalid trans parameters\n"));
 769         DLIST_REMOVE(conn->pending_trans, state);
 770         SAFE_FREE(state->data);
 771         SAFE_FREE(state->param);
 772         TALLOC_FREE(state);
 773         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 774         END_PROFILE(SMBtranss);
 775         return;
 776 }