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                           true, req->seqnum+1,
 138                           IS_CONN_ENCRYPTED(conn), &req->pcd)) {
 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                                   true, req->seqnum+1,
 195                                   IS_CONN_ENCRYPTED(conn), &req->pcd))
 196                         exit_server_cleanly("send_trans_reply: srv_send_smb "
 197                                             "failed.");
 198
 199                 tot_data_sent  += this_ldata;
 200                 tot_param_sent += this_lparam;
 201                 TALLOC_FREE(req->outbuf);
 202         }
 203 }
 204
 205 /****************************************************************************
 206  Start the first part of an RPC reply which began with an SMBtrans request.
 207 ****************************************************************************/
 208
 209 struct dcerpc_cmd_state {
 210         struct fake_file_handle *handle;
 211         uint8_t *data;
 212         size_t num_data;
 213         size_t max_read;
 214 };
 215
 216 static void api_dcerpc_cmd_write_done(struct tevent_req *subreq);
 217 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq);
 218
 219 static void api_dcerpc_cmd(connection_struct *conn, struct smb_request *req,
 220                            files_struct *fsp, uint8_t *data, size_t length,
 221                            size_t max_read)
 222 {
 223         struct tevent_req *subreq;
 224         struct dcerpc_cmd_state *state;
 225
 226         if (!fsp_is_np(fsp)) {
 227                 api_no_reply(conn, req);
 228                 return;
 229         }
 230
 231         state = talloc(req, struct dcerpc_cmd_state);
 232         if (state == NULL) {
 233                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 234                 return;
 235         }
 236         req->async_priv = state;
 237
 238         state->handle = fsp->fake_file_handle;
 239
 240         /*
 241          * This memdup severely sucks. But doing it properly essentially means
 242          * to rewrite lanman.c, something which I don't really want to do now.
 243          */
 244         state->data = (uint8_t *)talloc_memdup(state, data, length);
 245         if (state->data == NULL) {
 246                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 247                 return;
 248         }
 249         state->num_data = length;
 250         state->max_read = max_read;
 251
 252         subreq = np_write_send(state, smbd_event_context(), state->handle,
 253                                state->data, length);
 254         if (subreq == NULL) {
 255                 TALLOC_FREE(state);
 256                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 257                 return;
 258         }
 259         tevent_req_set_callback(subreq, api_dcerpc_cmd_write_done,
 260                                 talloc_move(conn, &req));
 261 }
 262
 263 static void api_dcerpc_cmd_write_done(struct tevent_req *subreq)
 264 {
 265         struct smb_request *req = tevent_req_callback_data(
 266                 subreq, struct smb_request);
 267         struct dcerpc_cmd_state *state = talloc_get_type_abort(
 268                 req->async_priv, struct dcerpc_cmd_state);
 269         NTSTATUS status;
 270         ssize_t nwritten = -1;
 271
 272         status = np_write_recv(subreq, &nwritten);
 273         TALLOC_FREE(subreq);
 274         if (!NT_STATUS_IS_OK(status) || (nwritten != state->num_data)) {
 275                 DEBUG(10, ("Could not write to pipe: %s (%d/%d)\n",
 276                            nt_errstr(status), (int)state->num_data,
 277                            (int)nwritten));
 278                 reply_nterror(req, NT_STATUS_PIPE_NOT_AVAILABLE);
 279                 goto send;
 280         }
 281
 282         state->data = TALLOC_REALLOC_ARRAY(state, state->data, uint8_t,
 283                                            state->max_read);
 284         if (state->data == NULL) {
 285                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 286                 goto send;
 287         }
 288
 289         subreq = np_read_send(req->conn, smbd_event_context(),
 290                               state->handle, state->data, state->max_read);
 291         if (subreq == NULL) {
 292                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 293                 goto send;
 294         }
 295         tevent_req_set_callback(subreq, api_dcerpc_cmd_read_done, req);
 296         return;
 297
 298  send:
 299         if (!srv_send_smb(
 300                     smbd_server_fd(), (char *)req->outbuf,
 301                     true, req->seqnum+1,
 302                     IS_CONN_ENCRYPTED(req->conn) || req->encrypted,
 303                     &req->pcd)) {
 304                 exit_server_cleanly("construct_reply: srv_send_smb failed.");
 305         }
 306         TALLOC_FREE(req);
 307 }
 308
 309 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq)
 310 {
 311         struct smb_request *req = tevent_req_callback_data(
 312                 subreq, struct smb_request);
 313         struct dcerpc_cmd_state *state = talloc_get_type_abort(
 314                 req->async_priv, struct dcerpc_cmd_state);
 315         NTSTATUS status;
 316         ssize_t nread;
 317         bool is_data_outstanding;
 318
 319         status = np_read_recv(subreq, &nread, &is_data_outstanding);
 320         TALLOC_FREE(subreq);
 321
 322         if (!NT_STATUS_IS_OK(status)) {
 323                 DEBUG(10, ("Could not read from to pipe: %s\n",
 324                            nt_errstr(status)));
 325                 reply_nterror(req, status);
 326
 327                 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
 328                                   true, req->seqnum+1,
 329                                   IS_CONN_ENCRYPTED(req->conn)
 330                                   ||req->encrypted, &req->pcd)) {
 331                         exit_server_cleanly("construct_reply: srv_send_smb "
 332                                             "failed.");
 333                 }
 334                 TALLOC_FREE(req);
 335                 return;
 336         }
 337
 338         send_trans_reply(req->conn, req, NULL, 0, (char *)state->data, nread,
 339                          is_data_outstanding);
 340         TALLOC_FREE(req);
 341 }
 342
 343 /****************************************************************************
 344  WaitNamedPipeHandleState
 345 ****************************************************************************/
 346
 347 static void api_WNPHS(connection_struct *conn, struct smb_request *req,
 348                       struct files_struct *fsp, char *param, int param_len)
 349 {
 350         if (!param || param_len < 2) {
 351                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 352                 return;
 353         }
 354
 355         DEBUG(4,("WaitNamedPipeHandleState priority %x\n",
 356                  (int)SVAL(param,0)));
 357
 358         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 359 }
 360
 361
 362 /****************************************************************************
 363  SetNamedPipeHandleState
 364 ****************************************************************************/
 365
 366 static void api_SNPHS(connection_struct *conn, struct smb_request *req,
 367                       struct files_struct *fsp, char *param, int param_len)
 368 {
 369         if (!param || param_len < 2) {
 370                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 371                 return;
 372         }
 373
 374         DEBUG(4,("SetNamedPipeHandleState to code %x\n", (int)SVAL(param,0)));
 375
 376         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 377 }
 378
 379
 380 /****************************************************************************
 381  When no reply is generated, indicate unsupported.
 382  ****************************************************************************/
 383
 384 static void api_no_reply(connection_struct *conn, struct smb_request *req)
 385 {
 386         char rparam[4];
 387
 388         /* unsupported */
 389         SSVAL(rparam,0,NERR_notsupported);
 390         SSVAL(rparam,2,0); /* converter word */
 391
 392         DEBUG(3,("Unsupported API fd command\n"));
 393
 394         /* now send the reply */
 395         send_trans_reply(conn, req, rparam, 4, NULL, 0, False);
 396
 397         return;
 398 }
 399
 400 /****************************************************************************
 401  Handle remote api calls delivered to a named pipe already opened.
 402  ****************************************************************************/
 403
 404 static void api_fd_reply(connection_struct *conn, uint16 vuid,
 405                          struct smb_request *req,
 406                          uint16 *setup, uint8_t *data, char *params,
 407                          int suwcnt, int tdscnt, int tpscnt,
 408                          int mdrcnt, int mprcnt)
 409 {
 410         struct files_struct *fsp;
 411         int pnum;
 412         int subcommand;
 413
 414         DEBUG(5,("api_fd_reply\n"));
 415
 416         /* First find out the name of this file. */
 417         if (suwcnt != 2) {
 418                 DEBUG(0,("Unexpected named pipe transaction.\n"));
 419                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 420                 return;
 421         }
 422
 423         /* Get the file handle and hence the file name. */
 424         /*
 425          * NB. The setup array has already been transformed
 426          * via SVAL and so is in host byte order.
 427          */
 428         pnum = ((int)setup[1]) & 0xFFFF;
 429         subcommand = ((int)setup[0]) & 0xFFFF;
 430
 431         fsp = file_fsp(req, pnum);
 432
 433         if (!fsp_is_np(fsp)) {
 434                 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
 435                         /* Win9x does this call with a unicode pipe name, not a pnum. */
 436                         /* Just return success for now... */
 437                         DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
 438                         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 439                         return;
 440                 }
 441
 442                 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
 443                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 444                 return;
 445         }
 446
 447         if (vuid != fsp->vuid) {
 448                 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
 449                           "expected %d\n", pnum, vuid, fsp->vuid));
 450                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 451                 return;
 452         }
 453
 454         DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n",
 455                  subcommand, fsp->fsp_name, pnum));
 456
 457         DEBUG(10, ("api_fd_reply: p:%p max_trans_reply: %d\n", fsp, mdrcnt));
 458
 459         switch (subcommand) {
 460         case TRANSACT_DCERPCCMD: {
 461                 /* dce/rpc command */
 462                 api_dcerpc_cmd(conn, req, fsp, (uint8_t *)data, tdscnt,
 463                                mdrcnt);
 464                 break;
 465         }
 466         case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
 467                 /* Wait Named Pipe Handle state */
 468                 api_WNPHS(conn, req, fsp, params, tpscnt);
 469                 break;
 470         case TRANSACT_SETNAMEDPIPEHANDLESTATE:
 471                 /* Set Named Pipe Handle state */
 472                 api_SNPHS(conn, req, fsp, params, tpscnt);
 473                 break;
 474         default:
 475                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 476                 return;
 477         }
 478 }
 479
 480 /****************************************************************************
 481  Handle named pipe commands.
 482 ****************************************************************************/
 483
 484 static void named_pipe(connection_struct *conn, uint16 vuid,
 485                        struct smb_request *req,
 486                        const char *name, uint16 *setup,
 487                        char *data, char *params,
 488                        int suwcnt, int tdscnt,int tpscnt,
 489                        int msrcnt, int mdrcnt, int mprcnt)
 490 {
 491         DEBUG(3,("named pipe command on <%s> name\n", name));
 492
 493         if (strequal(name,"LANMAN")) {
 494                 api_reply(conn, vuid, req,
 495                           data, params,
 496                           tdscnt, tpscnt,
 497                           mdrcnt, mprcnt);
 498                 return;
 499         }
 500
 501         if (strequal(name,"WKSSVC") ||
 502             strequal(name,"SRVSVC") ||
 503             strequal(name,"WINREG") ||
 504             strequal(name,"SAMR") ||
 505             strequal(name,"LSARPC")) {
 506
 507                 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
 508
 509                 api_fd_reply(conn, vuid, req,
 510                              setup, (uint8_t *)data, params,
 511                              suwcnt, tdscnt, tpscnt,
 512                              mdrcnt, mprcnt);
 513                 return;
 514         }
 515
 516         if (strlen(name) < 1) {
 517                 api_fd_reply(conn, vuid, req,
 518                              setup, (uint8_t *)data,
 519                              params, suwcnt, tdscnt,
 520                              tpscnt, mdrcnt, mprcnt);
 521                 return;
 522         }
 523
 524         if (setup)
 525                 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
 526                          (int)setup[0],(int)setup[1]));
 527
 528         reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 529         return;
 530 }
 531
 532 static void handle_trans(connection_struct *conn, struct smb_request *req,
 533                          struct trans_state *state)
 534 {
 535         char *local_machine_name;
 536         int name_offset = 0;
 537
 538         DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
 539                  state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
 540                  (unsigned int)state->setup_count));
 541
 542         /*
 543          * WinCE wierdness....
 544          */
 545
 546         local_machine_name = talloc_asprintf(state, "\\%s\\",
 547                                              get_local_machine_name());
 548
 549         if (local_machine_name == NULL) {
 550                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 551                 return;
 552         }
 553
 554         if (strnequal(state->name, local_machine_name,
 555                       strlen(local_machine_name))) {
 556                 name_offset = strlen(local_machine_name)-1;
 557         }
 558
 559         if (!strnequal(&state->name[name_offset], "\\PIPE",
 560                        strlen("\\PIPE"))) {
 561                 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 562                 return;
 563         }
 564
 565         name_offset += strlen("\\PIPE");
 566
 567         /* Win9x weirdness.  When talking to a unicode server Win9x
 568            only sends \PIPE instead of \PIPE\ */
 569
 570         if (state->name[name_offset] == '\\')
 571                 name_offset++;
 572
 573         DEBUG(5,("calling named_pipe\n"));
 574         named_pipe(conn, state->vuid, req,
 575                    state->name+name_offset,
 576                    state->setup,state->data,
 577                    state->param,
 578                    state->setup_count,state->total_data,
 579                    state->total_param,
 580                    state->max_setup_return,
 581                    state->max_data_return,
 582                    state->max_param_return);
 583
 584         if (state->close_on_completion) {
 585                 close_cnum(conn,state->vuid);
 586                 req->conn = NULL;
 587         }
 588
 589         return;
 590 }
 591
 592 /****************************************************************************
 593  Reply to a SMBtrans.
 594  ****************************************************************************/
 595
 596 void reply_trans(struct smb_request *req)
 597 {
 598         connection_struct *conn = req->conn;
 599         unsigned int dsoff;
 600         unsigned int dscnt;
 601         unsigned int psoff;
 602         unsigned int pscnt;
 603         struct trans_state *state;
 604         NTSTATUS result;
 605
 606         START_PROFILE(SMBtrans);
 607
 608         if (req->wct < 14) {
 609                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 610                 END_PROFILE(SMBtrans);
 611                 return;
 612         }
 613
 614         dsoff = SVAL(req->vwv+12, 0);
 615         dscnt = SVAL(req->vwv+11, 0);
 616         psoff = SVAL(req->vwv+10, 0);
 617         pscnt = SVAL(req->vwv+9, 0);
 618
 619         result = allow_new_trans(conn->pending_trans, req->mid);
 620         if (!NT_STATUS_IS_OK(result)) {
 621                 DEBUG(2, ("Got invalid trans request: %s\n",
 622                           nt_errstr(result)));
 623                 reply_nterror(req, result);
 624                 END_PROFILE(SMBtrans);
 625                 return;
 626         }
 627
 628         if ((state = TALLOC_P(conn, struct trans_state)) == NULL) {
 629                 DEBUG(0, ("talloc failed\n"));
 630                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 631                 END_PROFILE(SMBtrans);
 632                 return;
 633         }
 634
 635         state->cmd = SMBtrans;
 636
 637         state->mid = req->mid;
 638         state->vuid = req->vuid;
 639         state->setup_count = CVAL(req->vwv+13, 0);
 640         state->setup = NULL;
 641         state->total_param = SVAL(req->vwv+0, 0);
 642         state->param = NULL;
 643         state->total_data = SVAL(req->vwv+1, 0);
 644         state->data = NULL;
 645         state->max_param_return = SVAL(req->vwv+2, 0);
 646         state->max_data_return = SVAL(req->vwv+3, 0);
 647         state->max_setup_return = CVAL(req->vwv+4, 0);
 648         state->close_on_completion = BITSETW(req->vwv+5, 0);
 649         state->one_way = BITSETW(req->vwv+5, 1);
 650
 651         srvstr_pull_req_talloc(state, req, &state->name, req->buf,
 652                                STR_TERMINATE);
 653
 654         if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
 655                         !state->name)
 656                 goto bad_param;
 657
 658         if (state->total_data)  {
 659
 660                 if (trans_oob(state->total_data, 0, dscnt)
 661                     || trans_oob(smb_len(req->inbuf), dsoff, dscnt)) {
 662                         goto bad_param;
 663                 }
 664
 665                 /* Can't use talloc here, the core routines do realloc on the
 666                  * params and data. Out of paranoia, 100 bytes too many. */
 667                 state->data = (char *)SMB_MALLOC(state->total_data+100);
 668                 if (state->data == NULL) {
 669                         DEBUG(0,("reply_trans: data malloc fail for %u "
 670                                  "bytes !\n", (unsigned int)state->total_data));
 671                         TALLOC_FREE(state);
 672                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 673                         END_PROFILE(SMBtrans);
 674                         return;
 675                 }
 676                 /* null-terminate the slack space */
 677                 memset(&state->data[state->total_data], 0, 100);
 678
 679                 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
 680         }
 681
 682         if (state->total_param) {
 683
 684                 if (trans_oob(state->total_param, 0, pscnt)
 685                     || trans_oob(smb_len(req->inbuf), psoff, pscnt)) {
 686                         goto bad_param;
 687                 }
 688
 689                 /* Can't use talloc here, the core routines do realloc on the
 690                  * params and data. Out of paranoia, 100 bytes too many */
 691                 state->param = (char *)SMB_MALLOC(state->total_param+100);
 692                 if (state->param == NULL) {
 693                         DEBUG(0,("reply_trans: param malloc fail for %u "
 694                                  "bytes !\n", (unsigned int)state->total_param));
 695                         SAFE_FREE(state->data);
 696                         TALLOC_FREE(state);
 697                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 698                         END_PROFILE(SMBtrans);
 699                         return;
 700                 }
 701                 /* null-terminate the slack space */
 702                 memset(&state->param[state->total_param], 0, 100);
 703
 704                 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
 705         }
 706
 707         state->received_data  = dscnt;
 708         state->received_param = pscnt;
 709
 710         if (state->setup_count) {
 711                 unsigned int i;
 712
 713                 /*
 714                  * No overflow possible here, state->setup_count is an
 715                  * unsigned int, being filled by a single byte from
 716                  * CVAL(req->vwv+13, 0) above. The cast in the comparison
 717                  * below is not necessary, it's here to clarify things. The
 718                  * validity of req->vwv and req->wct has been checked in
 719                  * init_smb_request already.
 720                  */
 721                 if (state->setup_count + 14 > (unsigned int)req->wct) {
 722                         goto bad_param;
 723                 }
 724
 725                 if((state->setup = TALLOC_ARRAY(
 726                             state, uint16, state->setup_count)) == NULL) {
 727                         DEBUG(0,("reply_trans: setup malloc fail for %u "
 728                                  "bytes !\n", (unsigned int)
 729                                  (state->setup_count * sizeof(uint16))));
 730                         SAFE_FREE(state->data);
 731                         SAFE_FREE(state->param);
 732                         TALLOC_FREE(state);
 733                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 734                         END_PROFILE(SMBtrans);
 735                         return;
 736                 }
 737
 738                 for (i=0;i<state->setup_count;i++) {
 739                         state->setup[i] = SVAL(req->vwv + 14 + i, 0);
 740                 }
 741         }
 742
 743         state->received_param = pscnt;
 744
 745         if ((state->received_param != state->total_param) ||
 746             (state->received_data != state->total_data)) {
 747                 DLIST_ADD(conn->pending_trans, state);
 748
 749                 /* We need to send an interim response then receive the rest
 750                    of the parameter/data bytes */
 751                 reply_outbuf(req, 0, 0);
 752                 show_msg((char *)req->outbuf);
 753                 END_PROFILE(SMBtrans);
 754                 return;
 755         }
 756
 757         talloc_steal(talloc_tos(), state);
 758
 759         handle_trans(conn, req, state);
 760
 761         SAFE_FREE(state->data);
 762         SAFE_FREE(state->param);
 763         TALLOC_FREE(state);
 764
 765         END_PROFILE(SMBtrans);
 766         return;
 767
 768   bad_param:
 769
 770         DEBUG(0,("reply_trans: invalid trans parameters\n"));
 771         SAFE_FREE(state->data);
 772         SAFE_FREE(state->param);
 773         TALLOC_FREE(state);
 774         END_PROFILE(SMBtrans);
 775         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 776         return;
 777 }
 778
 779 /****************************************************************************
 780  Reply to a secondary SMBtrans.
 781  ****************************************************************************/
 782
 783 void reply_transs(struct smb_request *req)
 784 {
 785         connection_struct *conn = req->conn;
 786         unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
 787         struct trans_state *state;
 788
 789         START_PROFILE(SMBtranss);
 790
 791         show_msg((char *)req->inbuf);
 792
 793         if (req->wct < 8) {
 794                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 795                 END_PROFILE(SMBtranss);
 796                 return;
 797         }
 798
 799         for (state = conn->pending_trans; state != NULL;
 800              state = state->next) {
 801                 if (state->mid == req->mid) {
 802                         break;
 803                 }
 804         }
 805
 806         if ((state == NULL) || (state->cmd != SMBtrans)) {
 807                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 808                 END_PROFILE(SMBtranss);
 809                 return;
 810         }
 811
 812         /* Revise total_params and total_data in case they have changed
 813          * downwards */
 814
 815         if (SVAL(req->vwv+0, 0) < state->total_param)
 816                 state->total_param = SVAL(req->vwv+0, 0);
 817         if (SVAL(req->vwv+1, 0) < state->total_data)
 818                 state->total_data = SVAL(req->vwv+1, 0);
 819
 820         pcnt = SVAL(req->vwv+2, 0);
 821         poff = SVAL(req->vwv+3, 0);
 822         pdisp = SVAL(req->vwv+4, 0);
 823
 824         dcnt = SVAL(req->vwv+5, 0);
 825         doff = SVAL(req->vwv+6, 0);
 826         ddisp = SVAL(req->vwv+7, 0);
 827
 828         state->received_param += pcnt;
 829         state->received_data += dcnt;
 830
 831         if ((state->received_data > state->total_data) ||
 832             (state->received_param > state->total_param))
 833                 goto bad_param;
 834
 835         if (pcnt) {
 836                 if (trans_oob(state->total_param, pdisp, pcnt)
 837                     || trans_oob(smb_len(req->inbuf), poff, pcnt)) {
 838                         goto bad_param;
 839                 }
 840                 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,pcnt);
 841         }
 842
 843         if (dcnt) {
 844                 if (trans_oob(state->total_data, ddisp, dcnt)
 845                     || trans_oob(smb_len(req->inbuf), doff, dcnt)) {
 846                         goto bad_param;
 847                 }
 848                 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,dcnt);
 849         }
 850
 851         if ((state->received_param < state->total_param) ||
 852             (state->received_data < state->total_data)) {
 853                 END_PROFILE(SMBtranss);
 854                 return;
 855         }
 856
 857         talloc_steal(talloc_tos(), state);
 858
 859         handle_trans(conn, req, state);
 860
 861         DLIST_REMOVE(conn->pending_trans, state);
 862         SAFE_FREE(state->data);
 863         SAFE_FREE(state->param);
 864         TALLOC_FREE(state);
 865
 866         END_PROFILE(SMBtranss);
 867         return;
 868
 869   bad_param:
 870
 871         DEBUG(0,("reply_transs: invalid trans parameters\n"));
 872         DLIST_REMOVE(conn->pending_trans, state);
 873         SAFE_FREE(state->data);
 874         SAFE_FREE(state->param);
 875         TALLOC_FREE(state);
 876         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 877         END_PROFILE(SMBtranss);
 878         return;
 879 }