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 #include "smbd/globals.h"
  29
  30 #define NERR_notsupported 50
  31
  32 static void api_no_reply(connection_struct *conn, struct smb_request *req);
  33
  34 /*******************************************************************
  35  copies parameters and data, as needed, into the smb buffer
  36
  37  *both* the data and params sections should be aligned.  this
  38  is fudged in the rpc pipes by
  39  at present, only the data section is.  this may be a possible
  40  cause of some of the ipc problems being experienced.  lkcl26dec97
  41
  42  ******************************************************************/
  43
  44 static void copy_trans_params_and_data(char *outbuf, int align,
  45                                 char *rparam, int param_offset, int param_len,
  46                                 char *rdata, int data_offset, int data_len)
  47 {
  48         char *copy_into = smb_buf(outbuf);
  49
  50         if(param_len < 0)
  51                 param_len = 0;
  52
  53         if(data_len < 0)
  54                 data_len = 0;
  55
  56         DEBUG(5,("copy_trans_params_and_data: params[%d..%d] data[%d..%d] (align %d)\n",
  57                         param_offset, param_offset + param_len,
  58                         data_offset , data_offset  + data_len,
  59                         align));
  60
  61         *copy_into = '\0';
  62
  63         copy_into += 1;
  64
  65         if (param_len)
  66                 memcpy(copy_into, &rparam[param_offset], param_len);
  67
  68         copy_into += param_len;
  69         if (align) {
  70                 memset(copy_into, '\0', align);
  71         }
  72
  73         copy_into += align;
  74
  75         if (data_len )
  76                 memcpy(copy_into, &rdata[data_offset], data_len);
  77 }
  78
  79 /****************************************************************************
  80  Send a trans reply.
  81  ****************************************************************************/
  82
  83 void send_trans_reply(connection_struct *conn,
  84                       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         /*
 108          * We might have SMBtranss in req which was transferred to the outbuf,
 109          * fix that.
 110          */
 111         SCVAL(req->outbuf, smb_com, SMBtrans);
 112
 113         copy_trans_params_and_data((char *)req->outbuf, align,
 114                                 rparam, tot_param_sent, this_lparam,
 115                                 rdata, tot_data_sent, this_ldata);
 116
 117         SSVAL(req->outbuf,smb_vwv0,lparam);
 118         SSVAL(req->outbuf,smb_vwv1,ldata);
 119         SSVAL(req->outbuf,smb_vwv3,this_lparam);
 120         SSVAL(req->outbuf,smb_vwv4,
 121               smb_offset(smb_buf(req->outbuf)+1, req->outbuf));
 122         SSVAL(req->outbuf,smb_vwv5,0);
 123         SSVAL(req->outbuf,smb_vwv6,this_ldata);
 124         SSVAL(req->outbuf,smb_vwv7,
 125               smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
 126                          req->outbuf));
 127         SSVAL(req->outbuf,smb_vwv8,0);
 128         SSVAL(req->outbuf,smb_vwv9,0);
 129
 130         if (buffer_too_large) {
 131                 error_packet_set((char *)req->outbuf, ERRDOS, ERRmoredata,
 132                                  STATUS_BUFFER_OVERFLOW, __LINE__, __FILE__);
 133         }
 134
 135         show_msg((char *)req->outbuf);
 136         if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
 137                           IS_CONN_ENCRYPTED(conn))) {
 138                 exit_server_cleanly("send_trans_reply: srv_send_smb failed.");
 139         }
 140
 141         TALLOC_FREE(req->outbuf);
 142
 143         tot_data_sent = this_ldata;
 144         tot_param_sent = this_lparam;
 145
 146         while (tot_data_sent < ldata || tot_param_sent < lparam)
 147         {
 148                 this_lparam = MIN(lparam-tot_param_sent,
 149                                   max_send - 500); /* hack */
 150                 this_ldata  = MIN(ldata -tot_data_sent,
 151                                   max_send - (500+this_lparam));
 152
 153                 if(this_lparam < 0)
 154                         this_lparam = 0;
 155
 156                 if(this_ldata < 0)
 157                         this_ldata = 0;
 158
 159                 align = (this_lparam%4);
 160
 161                 reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
 162
 163                 /*
 164                  * We might have SMBtranss in req which was transferred to the
 165                  * outbuf, fix that.
 166                  */
 167                 SCVAL(req->outbuf, smb_com, SMBtrans);
 168
 169                 copy_trans_params_and_data((char *)req->outbuf, align,
 170                                            rparam, tot_param_sent, this_lparam,
 171                                            rdata, tot_data_sent, this_ldata);
 172
 173                 SSVAL(req->outbuf,smb_vwv3,this_lparam);
 174                 SSVAL(req->outbuf,smb_vwv4,
 175                       smb_offset(smb_buf(req->outbuf)+1,req->outbuf));
 176                 SSVAL(req->outbuf,smb_vwv5,tot_param_sent);
 177                 SSVAL(req->outbuf,smb_vwv6,this_ldata);
 178                 SSVAL(req->outbuf,smb_vwv7,
 179                       smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
 180                                  req->outbuf));
 181                 SSVAL(req->outbuf,smb_vwv8,tot_data_sent);
 182                 SSVAL(req->outbuf,smb_vwv9,0);
 183
 184                 if (buffer_too_large) {
 185                         error_packet_set((char *)req->outbuf,
 186                                          ERRDOS, ERRmoredata,
 187                                          STATUS_BUFFER_OVERFLOW,
 188                                          __LINE__, __FILE__);
 189                 }
 190
 191                 show_msg((char *)req->outbuf);
 192                 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
 193                                   IS_CONN_ENCRYPTED(conn)))
 194                         exit_server_cleanly("send_trans_reply: srv_send_smb "
 195                                             "failed.");
 196
 197                 tot_data_sent  += this_ldata;
 198                 tot_param_sent += this_lparam;
 199                 TALLOC_FREE(req->outbuf);
 200         }
 201 }
 202
 203 /****************************************************************************
 204  Start the first part of an RPC reply which began with an SMBtrans request.
 205 ****************************************************************************/
 206
 207 static void api_rpc_trans_reply(connection_struct *conn,
 208                                 struct smb_request *req,
 209                                 files_struct *fsp,
 210                                 int max_trans_reply)
 211 {
 212         bool is_data_outstanding;
 213         uint8_t *rdata = SMB_MALLOC_ARRAY(uint8_t, max_trans_reply);
 214         ssize_t data_len;
 215         NTSTATUS status;
 216
 217         if(rdata == NULL) {
 218                 DEBUG(0,("api_rpc_trans_reply: malloc fail.\n"));
 219                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 220                 return;
 221         }
 222
 223         status = np_read(fsp, rdata, max_trans_reply, &data_len,
 224                          &is_data_outstanding);
 225         if (!NT_STATUS_IS_OK(status)) {
 226                 SAFE_FREE(rdata);
 227                 api_no_reply(conn,req);
 228                 return;
 229         }
 230
 231         send_trans_reply(conn, req, NULL, 0, (char *)rdata, data_len,
 232                          is_data_outstanding);
 233         SAFE_FREE(rdata);
 234         return;
 235 }
 236
 237 /****************************************************************************
 238  WaitNamedPipeHandleState
 239 ****************************************************************************/
 240
 241 static void api_WNPHS(connection_struct *conn, struct smb_request *req,
 242                       struct files_struct *fsp, char *param, int param_len)
 243 {
 244         if (!param || param_len < 2) {
 245                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 246                 return;
 247         }
 248
 249         DEBUG(4,("WaitNamedPipeHandleState priority %x\n",
 250                  (int)SVAL(param,0)));
 251
 252         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 253 }
 254
 255
 256 /****************************************************************************
 257  SetNamedPipeHandleState
 258 ****************************************************************************/
 259
 260 static void api_SNPHS(connection_struct *conn, struct smb_request *req,
 261                       struct files_struct *fsp, char *param, int param_len)
 262 {
 263         if (!param || param_len < 2) {
 264                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 265                 return;
 266         }
 267
 268         DEBUG(4,("SetNamedPipeHandleState to code %x\n", (int)SVAL(param,0)));
 269
 270         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 271 }
 272
 273
 274 /****************************************************************************
 275  When no reply is generated, indicate unsupported.
 276  ****************************************************************************/
 277
 278 static void api_no_reply(connection_struct *conn, struct smb_request *req)
 279 {
 280         char rparam[4];
 281
 282         /* unsupported */
 283         SSVAL(rparam,0,NERR_notsupported);
 284         SSVAL(rparam,2,0); /* converter word */
 285
 286         DEBUG(3,("Unsupported API fd command\n"));
 287
 288         /* now send the reply */
 289         send_trans_reply(conn, req, rparam, 4, NULL, 0, False);
 290
 291         return;
 292 }
 293
 294 /****************************************************************************
 295  Handle remote api calls delivered to a named pipe already opened.
 296  ****************************************************************************/
 297
 298 static void api_fd_reply(connection_struct *conn, uint16 vuid,
 299                          struct smb_request *req,
 300                          uint16 *setup, uint8_t *data, char *params,
 301                          int suwcnt, int tdscnt, int tpscnt,
 302                          int mdrcnt, int mprcnt)
 303 {
 304         struct files_struct *fsp;
 305         int pnum;
 306         int subcommand;
 307         NTSTATUS status;
 308
 309         DEBUG(5,("api_fd_reply\n"));
 310
 311         /* First find out the name of this file. */
 312         if (suwcnt != 2) {
 313                 DEBUG(0,("Unexpected named pipe transaction.\n"));
 314                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 315                 return;
 316         }
 317
 318         /* Get the file handle and hence the file name. */
 319         /*
 320          * NB. The setup array has already been transformed
 321          * via SVAL and so is in host byte order.
 322          */
 323         pnum = ((int)setup[1]) & 0xFFFF;
 324         subcommand = ((int)setup[0]) & 0xFFFF;
 325
 326         fsp = file_fsp(req, pnum);
 327
 328         if (!fsp_is_np(fsp)) {
 329                 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
 330                         /* Win9x does this call with a unicode pipe name, not a pnum. */
 331                         /* Just return success for now... */
 332                         DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
 333                         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 334                         return;
 335                 }
 336
 337                 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
 338                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 339                 return;
 340         }
 341
 342         if (vuid != fsp->vuid) {
 343                 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
 344                           "expected %d\n", pnum, vuid, fsp->vuid));
 345                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 346                 return;
 347         }
 348
 349         DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n",
 350                  subcommand, fsp->fsp_name, pnum));
 351
 352         DEBUG(10, ("api_fd_reply: p:%p max_trans_reply: %d\n", fsp, mdrcnt));
 353
 354         switch (subcommand) {
 355         case TRANSACT_DCERPCCMD: {
 356                 /* dce/rpc command */
 357                 ssize_t nwritten;
 358                 status = np_write(fsp, data, tdscnt, &nwritten);
 359                 if (!NT_STATUS_IS_OK(status)) {
 360                         api_no_reply(conn, req);
 361                         return;
 362                 }
 363                 api_rpc_trans_reply(conn, req, fsp, mdrcnt);
 364                 break;
 365         }
 366         case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
 367                 /* Wait Named Pipe Handle state */
 368                 api_WNPHS(conn, req, fsp, params, tpscnt);
 369                 break;
 370         case TRANSACT_SETNAMEDPIPEHANDLESTATE:
 371                 /* Set Named Pipe Handle state */
 372                 api_SNPHS(conn, req, fsp, params, tpscnt);
 373                 break;
 374         default:
 375                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 376                 return;
 377         }
 378 }
 379
 380 /****************************************************************************
 381  Handle named pipe commands.
 382 ****************************************************************************/
 383
 384 static void named_pipe(connection_struct *conn, uint16 vuid,
 385                        struct smb_request *req,
 386                        const char *name, uint16 *setup,
 387                        char *data, char *params,
 388                        int suwcnt, int tdscnt,int tpscnt,
 389                        int msrcnt, int mdrcnt, int mprcnt)
 390 {
 391         DEBUG(3,("named pipe command on <%s> name\n", name));
 392
 393         if (strequal(name,"LANMAN")) {
 394                 api_reply(conn, vuid, req,
 395                           data, params,
 396                           tdscnt, tpscnt,
 397                           mdrcnt, mprcnt);
 398                 return;
 399         }
 400
 401         if (strequal(name,"WKSSVC") ||
 402             strequal(name,"SRVSVC") ||
 403             strequal(name,"WINREG") ||
 404             strequal(name,"SAMR") ||
 405             strequal(name,"LSARPC")) {
 406
 407                 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
 408
 409                 api_fd_reply(conn, vuid, req,
 410                              setup, (uint8_t *)data, params,
 411                              suwcnt, tdscnt, tpscnt,
 412                              mdrcnt, mprcnt);
 413                 return;
 414         }
 415
 416         if (strlen(name) < 1) {
 417                 api_fd_reply(conn, vuid, req,
 418                              setup, (uint8_t *)data,
 419                              params, suwcnt, tdscnt,
 420                              tpscnt, mdrcnt, mprcnt);
 421                 return;
 422         }
 423
 424         if (setup)
 425                 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
 426                          (int)setup[0],(int)setup[1]));
 427
 428         reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 429         return;
 430 }
 431
 432 static void handle_trans(connection_struct *conn, struct smb_request *req,
 433                          struct trans_state *state)
 434 {
 435         char *local_machine_name;
 436         int name_offset = 0;
 437
 438         DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
 439                  state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
 440                  (unsigned int)state->setup_count));
 441
 442         /*
 443          * WinCE wierdness....
 444          */
 445
 446         local_machine_name = talloc_asprintf(state, "\\%s\\",
 447                                              get_local_machine_name());
 448
 449         if (local_machine_name == NULL) {
 450                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 451                 return;
 452         }
 453
 454         if (strnequal(state->name, local_machine_name,
 455                       strlen(local_machine_name))) {
 456                 name_offset = strlen(local_machine_name)-1;
 457         }
 458
 459         if (!strnequal(&state->name[name_offset], "\\PIPE",
 460                        strlen("\\PIPE"))) {
 461                 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 462                 return;
 463         }
 464
 465         name_offset += strlen("\\PIPE");
 466
 467         /* Win9x weirdness.  When talking to a unicode server Win9x
 468            only sends \PIPE instead of \PIPE\ */
 469
 470         if (state->name[name_offset] == '\\')
 471                 name_offset++;
 472
 473         DEBUG(5,("calling named_pipe\n"));
 474         named_pipe(conn, state->vuid, req,
 475                    state->name+name_offset,
 476                    state->setup,state->data,
 477                    state->param,
 478                    state->setup_count,state->total_data,
 479                    state->total_param,
 480                    state->max_setup_return,
 481                    state->max_data_return,
 482                    state->max_param_return);
 483
 484         if (state->close_on_completion) {
 485                 close_cnum(conn,state->vuid);
 486                 req->conn = NULL;
 487         }
 488
 489         return;
 490 }
 491
 492 /****************************************************************************
 493  Reply to a SMBtrans.
 494  ****************************************************************************/
 495
 496 void reply_trans(struct smb_request *req)
 497 {
 498         connection_struct *conn = req->conn;
 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
 506         START_PROFILE(SMBtrans);
 507
 508         if (req->wct < 14) {
 509                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 510                 END_PROFILE(SMBtrans);
 511                 return;
 512         }
 513
 514         dsoff = SVAL(req->vwv+12, 0);
 515         dscnt = SVAL(req->vwv+11, 0);
 516         psoff = SVAL(req->vwv+10, 0);
 517         pscnt = SVAL(req->vwv+9, 0);
 518
 519         result = allow_new_trans(conn->pending_trans, req->mid);
 520         if (!NT_STATUS_IS_OK(result)) {
 521                 DEBUG(2, ("Got invalid trans request: %s\n",
 522                           nt_errstr(result)));
 523                 reply_nterror(req, result);
 524                 END_PROFILE(SMBtrans);
 525                 return;
 526         }
 527
 528         if ((state = TALLOC_P(conn, struct trans_state)) == NULL) {
 529                 DEBUG(0, ("talloc failed\n"));
 530                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 531                 END_PROFILE(SMBtrans);
 532                 return;
 533         }
 534
 535         state->cmd = SMBtrans;
 536
 537         state->mid = req->mid;
 538         state->vuid = req->vuid;
 539         state->setup_count = CVAL(req->vwv+13, 0);
 540         state->setup = NULL;
 541         state->total_param = SVAL(req->vwv+0, 0);
 542         state->param = NULL;
 543         state->total_data = SVAL(req->vwv+1, 0);
 544         state->data = NULL;
 545         state->max_param_return = SVAL(req->vwv+2, 0);
 546         state->max_data_return = SVAL(req->vwv+3, 0);
 547         state->max_setup_return = CVAL(req->vwv+4, 0);
 548         state->close_on_completion = BITSETW(req->vwv+5, 0);
 549         state->one_way = BITSETW(req->vwv+5, 1);
 550
 551         srvstr_pull_req_talloc(state, req, &state->name, req->buf,
 552                                STR_TERMINATE);
 553
 554         if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
 555                         !state->name)
 556                 goto bad_param;
 557
 558         if (state->total_data)  {
 559
 560                 if (trans_oob(state->total_data, 0, dscnt)
 561                     || trans_oob(smb_len(req->inbuf), dsoff, dscnt)) {
 562                         goto bad_param;
 563                 }
 564
 565                 /* Can't use talloc here, the core routines do realloc on the
 566                  * params and data. Out of paranoia, 100 bytes too many. */
 567                 state->data = (char *)SMB_MALLOC(state->total_data+100);
 568                 if (state->data == NULL) {
 569                         DEBUG(0,("reply_trans: data malloc fail for %u "
 570                                  "bytes !\n", (unsigned int)state->total_data));
 571                         TALLOC_FREE(state);
 572                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 573                         END_PROFILE(SMBtrans);
 574                         return;
 575                 }
 576                 /* null-terminate the slack space */
 577                 memset(&state->data[state->total_data], 0, 100);
 578
 579                 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
 580         }
 581
 582         if (state->total_param) {
 583
 584                 if (trans_oob(state->total_param, 0, pscnt)
 585                     || trans_oob(smb_len(req->inbuf), psoff, pscnt)) {
 586                         goto bad_param;
 587                 }
 588
 589                 /* Can't use talloc here, the core routines do realloc on the
 590                  * params and data. Out of paranoia, 100 bytes too many */
 591                 state->param = (char *)SMB_MALLOC(state->total_param+100);
 592                 if (state->param == NULL) {
 593                         DEBUG(0,("reply_trans: param malloc fail for %u "
 594                                  "bytes !\n", (unsigned int)state->total_param));
 595                         SAFE_FREE(state->data);
 596                         TALLOC_FREE(state);
 597                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 598                         END_PROFILE(SMBtrans);
 599                         return;
 600                 }
 601                 /* null-terminate the slack space */
 602                 memset(&state->param[state->total_param], 0, 100);
 603
 604                 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
 605         }
 606
 607         state->received_data  = dscnt;
 608         state->received_param = pscnt;
 609
 610         if (state->setup_count) {
 611                 unsigned int i;
 612
 613                 /*
 614                  * No overflow possible here, state->setup_count is an
 615                  * unsigned int, being filled by a single byte from
 616                  * CVAL(req->vwv+13, 0) above. The cast in the comparison
 617                  * below is not necessary, it's here to clarify things. The
 618                  * validity of req->vwv and req->wct has been checked in
 619                  * init_smb_request already.
 620                  */
 621                 if (state->setup_count + 14 > (unsigned int)req->wct) {
 622                         goto bad_param;
 623                 }
 624
 625                 if((state->setup = TALLOC_ARRAY(
 626                             state, uint16, state->setup_count)) == NULL) {
 627                         DEBUG(0,("reply_trans: setup malloc fail for %u "
 628                                  "bytes !\n", (unsigned int)
 629                                  (state->setup_count * sizeof(uint16))));
 630                         SAFE_FREE(state->data);
 631                         SAFE_FREE(state->param);
 632                         TALLOC_FREE(state);
 633                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 634                         END_PROFILE(SMBtrans);
 635                         return;
 636                 }
 637
 638                 for (i=0;i<state->setup_count;i++) {
 639                         state->setup[i] = SVAL(req->vwv + 14 + i, 0);
 640                 }
 641         }
 642
 643         state->received_param = pscnt;
 644
 645         if ((state->received_param != state->total_param) ||
 646             (state->received_data != state->total_data)) {
 647                 DLIST_ADD(conn->pending_trans, state);
 648
 649                 /* We need to send an interim response then receive the rest
 650                    of the parameter/data bytes */
 651                 reply_outbuf(req, 0, 0);
 652                 show_msg((char *)req->outbuf);
 653                 END_PROFILE(SMBtrans);
 654                 return;
 655         }
 656
 657         handle_trans(conn, req, state);
 658
 659         SAFE_FREE(state->data);
 660         SAFE_FREE(state->param);
 661         TALLOC_FREE(state);
 662
 663         END_PROFILE(SMBtrans);
 664         return;
 665
 666   bad_param:
 667
 668         DEBUG(0,("reply_trans: invalid trans parameters\n"));
 669         SAFE_FREE(state->data);
 670         SAFE_FREE(state->param);
 671         TALLOC_FREE(state);
 672         END_PROFILE(SMBtrans);
 673         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 674         return;
 675 }
 676
 677 /****************************************************************************
 678  Reply to a secondary SMBtrans.
 679  ****************************************************************************/
 680
 681 void reply_transs(struct smb_request *req)
 682 {
 683         connection_struct *conn = req->conn;
 684         unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
 685         struct trans_state *state;
 686
 687         START_PROFILE(SMBtranss);
 688
 689         show_msg((char *)req->inbuf);
 690
 691         if (req->wct < 8) {
 692                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 693                 END_PROFILE(SMBtranss);
 694                 return;
 695         }
 696
 697         for (state = conn->pending_trans; state != NULL;
 698              state = state->next) {
 699                 if (state->mid == req->mid) {
 700                         break;
 701                 }
 702         }
 703
 704         if ((state == NULL) || (state->cmd != SMBtrans)) {
 705                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 706                 END_PROFILE(SMBtranss);
 707                 return;
 708         }
 709
 710         /* Revise total_params and total_data in case they have changed
 711          * downwards */
 712
 713         if (SVAL(req->vwv+0, 0) < state->total_param)
 714                 state->total_param = SVAL(req->vwv+0, 0);
 715         if (SVAL(req->vwv+1, 0) < state->total_data)
 716                 state->total_data = SVAL(req->vwv+1, 0);
 717
 718         pcnt = SVAL(req->vwv+2, 0);
 719         poff = SVAL(req->vwv+3, 0);
 720         pdisp = SVAL(req->vwv+4, 0);
 721
 722         dcnt = SVAL(req->vwv+5, 0);
 723         doff = SVAL(req->vwv+6, 0);
 724         ddisp = SVAL(req->vwv+7, 0);
 725
 726         state->received_param += pcnt;
 727         state->received_data += dcnt;
 728
 729         if ((state->received_data > state->total_data) ||
 730             (state->received_param > state->total_param))
 731                 goto bad_param;
 732
 733         if (pcnt) {
 734                 if (trans_oob(state->total_param, pdisp, pcnt)
 735                     || trans_oob(smb_len(req->inbuf), poff, pcnt)) {
 736                         goto bad_param;
 737                 }
 738                 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,pcnt);
 739         }
 740
 741         if (dcnt) {
 742                 if (trans_oob(state->total_data, ddisp, dcnt)
 743                     || trans_oob(smb_len(req->inbuf), doff, dcnt)) {
 744                         goto bad_param;
 745                 }
 746                 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,dcnt);
 747         }
 748
 749         if ((state->received_param < state->total_param) ||
 750             (state->received_data < state->total_data)) {
 751                 END_PROFILE(SMBtranss);
 752                 return;
 753         }
 754
 755         handle_trans(conn, req, state);
 756
 757         DLIST_REMOVE(conn->pending_trans, state);
 758         SAFE_FREE(state->data);
 759         SAFE_FREE(state->param);
 760         TALLOC_FREE(state);
 761
 762         END_PROFILE(SMBtranss);
 763         return;
 764
 765   bad_param:
 766
 767         DEBUG(0,("reply_transs: invalid trans parameters\n"));
 768         DLIST_REMOVE(conn->pending_trans, state);
 769         SAFE_FREE(state->data);
 770         SAFE_FREE(state->param);
 771         TALLOC_FREE(state);
 772         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 773         END_PROFILE(SMBtranss);
 774         return;
 775 }