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         struct smbd_server_connection *sconn = smbd_server_conn;
  97         int max_send = sconn->smb1.sessions.max_send;
  98
  99         if (buffer_too_large)
 100                 DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
 101
 102         this_lparam = MIN(lparam,max_send - 500); /* hack */
 103         this_ldata  = MIN(ldata,max_send - (500+this_lparam));
 104
 105         align = ((this_lparam)%4);
 106
 107         reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
 108
 109         /*
 110          * We might have SMBtranss in req which was transferred to the outbuf,
 111          * fix that.
 112          */
 113         SCVAL(req->outbuf, smb_com, SMBtrans);
 114
 115         copy_trans_params_and_data((char *)req->outbuf, align,
 116                                 rparam, tot_param_sent, this_lparam,
 117                                 rdata, tot_data_sent, this_ldata);
 118
 119         SSVAL(req->outbuf,smb_vwv0,lparam);
 120         SSVAL(req->outbuf,smb_vwv1,ldata);
 121         SSVAL(req->outbuf,smb_vwv3,this_lparam);
 122         SSVAL(req->outbuf,smb_vwv4,
 123               smb_offset(smb_buf(req->outbuf)+1, req->outbuf));
 124         SSVAL(req->outbuf,smb_vwv5,0);
 125         SSVAL(req->outbuf,smb_vwv6,this_ldata);
 126         SSVAL(req->outbuf,smb_vwv7,
 127               smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
 128                          req->outbuf));
 129         SSVAL(req->outbuf,smb_vwv8,0);
 130         SSVAL(req->outbuf,smb_vwv9,0);
 131
 132         if (buffer_too_large) {
 133                 error_packet_set((char *)req->outbuf, ERRDOS, ERRmoredata,
 134                                  STATUS_BUFFER_OVERFLOW, __LINE__, __FILE__);
 135         }
 136
 137         show_msg((char *)req->outbuf);
 138         if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
 139                           true, req->seqnum+1,
 140                           IS_CONN_ENCRYPTED(conn), &req->pcd)) {
 141                 exit_server_cleanly("send_trans_reply: srv_send_smb failed.");
 142         }
 143
 144         TALLOC_FREE(req->outbuf);
 145
 146         tot_data_sent = this_ldata;
 147         tot_param_sent = this_lparam;
 148
 149         while (tot_data_sent < ldata || tot_param_sent < lparam)
 150         {
 151                 this_lparam = MIN(lparam-tot_param_sent,
 152                                   max_send - 500); /* hack */
 153                 this_ldata  = MIN(ldata -tot_data_sent,
 154                                   max_send - (500+this_lparam));
 155
 156                 if(this_lparam < 0)
 157                         this_lparam = 0;
 158
 159                 if(this_ldata < 0)
 160                         this_ldata = 0;
 161
 162                 align = (this_lparam%4);
 163
 164                 reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
 165
 166                 /*
 167                  * We might have SMBtranss in req which was transferred to the
 168                  * outbuf, fix that.
 169                  */
 170                 SCVAL(req->outbuf, smb_com, SMBtrans);
 171
 172                 copy_trans_params_and_data((char *)req->outbuf, align,
 173                                            rparam, tot_param_sent, this_lparam,
 174                                            rdata, tot_data_sent, this_ldata);
 175
 176                 SSVAL(req->outbuf,smb_vwv3,this_lparam);
 177                 SSVAL(req->outbuf,smb_vwv4,
 178                       smb_offset(smb_buf(req->outbuf)+1,req->outbuf));
 179                 SSVAL(req->outbuf,smb_vwv5,tot_param_sent);
 180                 SSVAL(req->outbuf,smb_vwv6,this_ldata);
 181                 SSVAL(req->outbuf,smb_vwv7,
 182                       smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
 183                                  req->outbuf));
 184                 SSVAL(req->outbuf,smb_vwv8,tot_data_sent);
 185                 SSVAL(req->outbuf,smb_vwv9,0);
 186
 187                 if (buffer_too_large) {
 188                         error_packet_set((char *)req->outbuf,
 189                                          ERRDOS, ERRmoredata,
 190                                          STATUS_BUFFER_OVERFLOW,
 191                                          __LINE__, __FILE__);
 192                 }
 193
 194                 show_msg((char *)req->outbuf);
 195                 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
 196                                   true, req->seqnum+1,
 197                                   IS_CONN_ENCRYPTED(conn), &req->pcd))
 198                         exit_server_cleanly("send_trans_reply: srv_send_smb "
 199                                             "failed.");
 200
 201                 tot_data_sent  += this_ldata;
 202                 tot_param_sent += this_lparam;
 203                 TALLOC_FREE(req->outbuf);
 204         }
 205 }
 206
 207 /****************************************************************************
 208  Start the first part of an RPC reply which began with an SMBtrans request.
 209 ****************************************************************************/
 210
 211 struct dcerpc_cmd_state {
 212         struct fake_file_handle *handle;
 213         uint8_t *data;
 214         size_t num_data;
 215         size_t max_read;
 216 };
 217
 218 static void api_dcerpc_cmd_write_done(struct tevent_req *subreq);
 219 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq);
 220
 221 static void api_dcerpc_cmd(connection_struct *conn, struct smb_request *req,
 222                            files_struct *fsp, uint8_t *data, size_t length,
 223                            size_t max_read)
 224 {
 225         struct tevent_req *subreq;
 226         struct dcerpc_cmd_state *state;
 227
 228         if (!fsp_is_np(fsp)) {
 229                 api_no_reply(conn, req);
 230                 return;
 231         }
 232
 233         state = talloc(req, struct dcerpc_cmd_state);
 234         if (state == NULL) {
 235                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 236                 return;
 237         }
 238         req->async_priv = state;
 239
 240         state->handle = fsp->fake_file_handle;
 241
 242         /*
 243          * This memdup severely sucks. But doing it properly essentially means
 244          * to rewrite lanman.c, something which I don't really want to do now.
 245          */
 246         state->data = (uint8_t *)talloc_memdup(state, data, length);
 247         if (state->data == NULL) {
 248                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 249                 return;
 250         }
 251         state->num_data = length;
 252         state->max_read = max_read;
 253
 254         subreq = np_write_send(state, smbd_event_context(), state->handle,
 255                                state->data, length);
 256         if (subreq == NULL) {
 257                 TALLOC_FREE(state);
 258                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 259                 return;
 260         }
 261         tevent_req_set_callback(subreq, api_dcerpc_cmd_write_done,
 262                                 talloc_move(conn, &req));
 263 }
 264
 265 static void api_dcerpc_cmd_write_done(struct tevent_req *subreq)
 266 {
 267         struct smb_request *req = tevent_req_callback_data(
 268                 subreq, struct smb_request);
 269         struct dcerpc_cmd_state *state = talloc_get_type_abort(
 270                 req->async_priv, struct dcerpc_cmd_state);
 271         NTSTATUS status;
 272         ssize_t nwritten = -1;
 273
 274         status = np_write_recv(subreq, &nwritten);
 275         TALLOC_FREE(subreq);
 276         if (!NT_STATUS_IS_OK(status) || (nwritten != state->num_data)) {
 277                 DEBUG(10, ("Could not write to pipe: %s (%d/%d)\n",
 278                            nt_errstr(status), (int)state->num_data,
 279                            (int)nwritten));
 280                 reply_nterror(req, NT_STATUS_PIPE_NOT_AVAILABLE);
 281                 goto send;
 282         }
 283
 284         state->data = TALLOC_REALLOC_ARRAY(state, state->data, uint8_t,
 285                                            state->max_read);
 286         if (state->data == NULL) {
 287                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 288                 goto send;
 289         }
 290
 291         subreq = np_read_send(req->conn, smbd_event_context(),
 292                               state->handle, state->data, state->max_read);
 293         if (subreq == NULL) {
 294                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 295                 goto send;
 296         }
 297         tevent_req_set_callback(subreq, api_dcerpc_cmd_read_done, req);
 298         return;
 299
 300  send:
 301         if (!srv_send_smb(
 302                     smbd_server_fd(), (char *)req->outbuf,
 303                     true, req->seqnum+1,
 304                     IS_CONN_ENCRYPTED(req->conn) || req->encrypted,
 305                     &req->pcd)) {
 306                 exit_server_cleanly("construct_reply: srv_send_smb failed.");
 307         }
 308         TALLOC_FREE(req);
 309 }
 310
 311 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq)
 312 {
 313         struct smb_request *req = tevent_req_callback_data(
 314                 subreq, struct smb_request);
 315         struct dcerpc_cmd_state *state = talloc_get_type_abort(
 316                 req->async_priv, struct dcerpc_cmd_state);
 317         NTSTATUS status;
 318         ssize_t nread;
 319         bool is_data_outstanding;
 320
 321         status = np_read_recv(subreq, &nread, &is_data_outstanding);
 322         TALLOC_FREE(subreq);
 323
 324         if (!NT_STATUS_IS_OK(status)) {
 325                 DEBUG(10, ("Could not read from to pipe: %s\n",
 326                            nt_errstr(status)));
 327                 reply_nterror(req, status);
 328
 329                 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
 330                                   true, req->seqnum+1,
 331                                   IS_CONN_ENCRYPTED(req->conn)
 332                                   ||req->encrypted, &req->pcd)) {
 333                         exit_server_cleanly("construct_reply: srv_send_smb "
 334                                             "failed.");
 335                 }
 336                 TALLOC_FREE(req);
 337                 return;
 338         }
 339
 340         send_trans_reply(req->conn, req, NULL, 0, (char *)state->data, nread,
 341                          is_data_outstanding);
 342         TALLOC_FREE(req);
 343 }
 344
 345 /****************************************************************************
 346  WaitNamedPipeHandleState
 347 ****************************************************************************/
 348
 349 static void api_WNPHS(connection_struct *conn, struct smb_request *req,
 350                       struct files_struct *fsp, char *param, int param_len)
 351 {
 352         if (!param || param_len < 2) {
 353                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 354                 return;
 355         }
 356
 357         DEBUG(4,("WaitNamedPipeHandleState priority %x\n",
 358                  (int)SVAL(param,0)));
 359
 360         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 361 }
 362
 363
 364 /****************************************************************************
 365  SetNamedPipeHandleState
 366 ****************************************************************************/
 367
 368 static void api_SNPHS(connection_struct *conn, struct smb_request *req,
 369                       struct files_struct *fsp, char *param, int param_len)
 370 {
 371         if (!param || param_len < 2) {
 372                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 373                 return;
 374         }
 375
 376         DEBUG(4,("SetNamedPipeHandleState to code %x\n", (int)SVAL(param,0)));
 377
 378         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 379 }
 380
 381
 382 /****************************************************************************
 383  When no reply is generated, indicate unsupported.
 384  ****************************************************************************/
 385
 386 static void api_no_reply(connection_struct *conn, struct smb_request *req)
 387 {
 388         char rparam[4];
 389
 390         /* unsupported */
 391         SSVAL(rparam,0,NERR_notsupported);
 392         SSVAL(rparam,2,0); /* converter word */
 393
 394         DEBUG(3,("Unsupported API fd command\n"));
 395
 396         /* now send the reply */
 397         send_trans_reply(conn, req, rparam, 4, NULL, 0, False);
 398
 399         return;
 400 }
 401
 402 /****************************************************************************
 403  Handle remote api calls delivered to a named pipe already opened.
 404  ****************************************************************************/
 405
 406 static void api_fd_reply(connection_struct *conn, uint16 vuid,
 407                          struct smb_request *req,
 408                          uint16 *setup, uint8_t *data, char *params,
 409                          int suwcnt, int tdscnt, int tpscnt,
 410                          int mdrcnt, int mprcnt)
 411 {
 412         struct files_struct *fsp;
 413         int pnum;
 414         int subcommand;
 415
 416         DEBUG(5,("api_fd_reply\n"));
 417
 418         /* First find out the name of this file. */
 419         if (suwcnt != 2) {
 420                 DEBUG(0,("Unexpected named pipe transaction.\n"));
 421                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 422                 return;
 423         }
 424
 425         /* Get the file handle and hence the file name. */
 426         /*
 427          * NB. The setup array has already been transformed
 428          * via SVAL and so is in host byte order.
 429          */
 430         pnum = ((int)setup[1]) & 0xFFFF;
 431         subcommand = ((int)setup[0]) & 0xFFFF;
 432
 433         fsp = file_fsp(req, pnum);
 434
 435         if (!fsp_is_np(fsp)) {
 436                 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
 437                         /* Win9x does this call with a unicode pipe name, not a pnum. */
 438                         /* Just return success for now... */
 439                         DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
 440                         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 441                         return;
 442                 }
 443
 444                 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
 445                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 446                 return;
 447         }
 448
 449         if (vuid != fsp->vuid) {
 450                 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
 451                           "expected %d\n", pnum, vuid, fsp->vuid));
 452                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 453                 return;
 454         }
 455
 456         DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n",
 457                  subcommand, fsp->fsp_name, pnum));
 458
 459         DEBUG(10, ("api_fd_reply: p:%p max_trans_reply: %d\n", fsp, mdrcnt));
 460
 461         switch (subcommand) {
 462         case TRANSACT_DCERPCCMD: {
 463                 /* dce/rpc command */
 464                 api_dcerpc_cmd(conn, req, fsp, (uint8_t *)data, tdscnt,
 465                                mdrcnt);
 466                 break;
 467         }
 468         case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
 469                 /* Wait Named Pipe Handle state */
 470                 api_WNPHS(conn, req, fsp, params, tpscnt);
 471                 break;
 472         case TRANSACT_SETNAMEDPIPEHANDLESTATE:
 473                 /* Set Named Pipe Handle state */
 474                 api_SNPHS(conn, req, fsp, params, tpscnt);
 475                 break;
 476         default:
 477                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 478                 return;
 479         }
 480 }
 481
 482 /****************************************************************************
 483  Handle named pipe commands.
 484 ****************************************************************************/
 485
 486 static void named_pipe(connection_struct *conn, uint16 vuid,
 487                        struct smb_request *req,
 488                        const char *name, uint16 *setup,
 489                        char *data, char *params,
 490                        int suwcnt, int tdscnt,int tpscnt,
 491                        int msrcnt, int mdrcnt, int mprcnt)
 492 {
 493         DEBUG(3,("named pipe command on <%s> name\n", name));
 494
 495         if (strequal(name,"LANMAN")) {
 496                 api_reply(conn, vuid, req,
 497                           data, params,
 498                           tdscnt, tpscnt,
 499                           mdrcnt, mprcnt);
 500                 return;
 501         }
 502
 503         if (strequal(name,"WKSSVC") ||
 504             strequal(name,"SRVSVC") ||
 505             strequal(name,"WINREG") ||
 506             strequal(name,"SAMR") ||
 507             strequal(name,"LSARPC")) {
 508
 509                 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
 510
 511                 api_fd_reply(conn, vuid, req,
 512                              setup, (uint8_t *)data, params,
 513                              suwcnt, tdscnt, tpscnt,
 514                              mdrcnt, mprcnt);
 515                 return;
 516         }
 517
 518         if (strlen(name) < 1) {
 519                 api_fd_reply(conn, vuid, req,
 520                              setup, (uint8_t *)data,
 521                              params, suwcnt, tdscnt,
 522                              tpscnt, mdrcnt, mprcnt);
 523                 return;
 524         }
 525
 526         if (setup)
 527                 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
 528                          (int)setup[0],(int)setup[1]));
 529
 530         reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 531         return;
 532 }
 533
 534 static void handle_trans(connection_struct *conn, struct smb_request *req,
 535                          struct trans_state *state)
 536 {
 537         char *local_machine_name;
 538         int name_offset = 0;
 539
 540         DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
 541                  state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
 542                  (unsigned int)state->setup_count));
 543
 544         /*
 545          * WinCE wierdness....
 546          */
 547
 548         local_machine_name = talloc_asprintf(state, "\\%s\\",
 549                                              get_local_machine_name());
 550
 551         if (local_machine_name == NULL) {
 552                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 553                 return;
 554         }
 555
 556         if (strnequal(state->name, local_machine_name,
 557                       strlen(local_machine_name))) {
 558                 name_offset = strlen(local_machine_name)-1;
 559         }
 560
 561         if (!strnequal(&state->name[name_offset], "\\PIPE",
 562                        strlen("\\PIPE"))) {
 563                 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 564                 return;
 565         }
 566
 567         name_offset += strlen("\\PIPE");
 568
 569         /* Win9x weirdness.  When talking to a unicode server Win9x
 570            only sends \PIPE instead of \PIPE\ */
 571
 572         if (state->name[name_offset] == '\\')
 573                 name_offset++;
 574
 575         DEBUG(5,("calling named_pipe\n"));
 576         named_pipe(conn, state->vuid, req,
 577                    state->name+name_offset,
 578                    state->setup,state->data,
 579                    state->param,
 580                    state->setup_count,state->total_data,
 581                    state->total_param,
 582                    state->max_setup_return,
 583                    state->max_data_return,
 584                    state->max_param_return);
 585
 586         if (state->close_on_completion) {
 587                 close_cnum(conn,state->vuid);
 588                 req->conn = NULL;
 589         }
 590
 591         return;
 592 }
 593
 594 /****************************************************************************
 595  Reply to a SMBtrans.
 596  ****************************************************************************/
 597
 598 void reply_trans(struct smb_request *req)
 599 {
 600         connection_struct *conn = req->conn;
 601         unsigned int dsoff;
 602         unsigned int dscnt;
 603         unsigned int psoff;
 604         unsigned int pscnt;
 605         struct trans_state *state;
 606         NTSTATUS result;
 607
 608         START_PROFILE(SMBtrans);
 609
 610         if (req->wct < 14) {
 611                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 612                 END_PROFILE(SMBtrans);
 613                 return;
 614         }
 615
 616         dsoff = SVAL(req->vwv+12, 0);
 617         dscnt = SVAL(req->vwv+11, 0);
 618         psoff = SVAL(req->vwv+10, 0);
 619         pscnt = SVAL(req->vwv+9, 0);
 620
 621         result = allow_new_trans(conn->pending_trans, req->mid);
 622         if (!NT_STATUS_IS_OK(result)) {
 623                 DEBUG(2, ("Got invalid trans request: %s\n",
 624                           nt_errstr(result)));
 625                 reply_nterror(req, result);
 626                 END_PROFILE(SMBtrans);
 627                 return;
 628         }
 629
 630         if ((state = TALLOC_P(conn, struct trans_state)) == NULL) {
 631                 DEBUG(0, ("talloc failed\n"));
 632                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 633                 END_PROFILE(SMBtrans);
 634                 return;
 635         }
 636
 637         state->cmd = SMBtrans;
 638
 639         state->mid = req->mid;
 640         state->vuid = req->vuid;
 641         state->setup_count = CVAL(req->vwv+13, 0);
 642         state->setup = NULL;
 643         state->total_param = SVAL(req->vwv+0, 0);
 644         state->param = NULL;
 645         state->total_data = SVAL(req->vwv+1, 0);
 646         state->data = NULL;
 647         state->max_param_return = SVAL(req->vwv+2, 0);
 648         state->max_data_return = SVAL(req->vwv+3, 0);
 649         state->max_setup_return = CVAL(req->vwv+4, 0);
 650         state->close_on_completion = BITSETW(req->vwv+5, 0);
 651         state->one_way = BITSETW(req->vwv+5, 1);
 652
 653         srvstr_pull_req_talloc(state, req, &state->name, req->buf,
 654                                STR_TERMINATE);
 655
 656         if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
 657                         !state->name)
 658                 goto bad_param;
 659
 660         if (state->total_data)  {
 661
 662                 if (trans_oob(state->total_data, 0, dscnt)
 663                     || trans_oob(smb_len(req->inbuf), dsoff, dscnt)) {
 664                         goto bad_param;
 665                 }
 666
 667                 /* Can't use talloc here, the core routines do realloc on the
 668                  * params and data. Out of paranoia, 100 bytes too many. */
 669                 state->data = (char *)SMB_MALLOC(state->total_data+100);
 670                 if (state->data == NULL) {
 671                         DEBUG(0,("reply_trans: data malloc fail for %u "
 672                                  "bytes !\n", (unsigned int)state->total_data));
 673                         TALLOC_FREE(state);
 674                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 675                         END_PROFILE(SMBtrans);
 676                         return;
 677                 }
 678                 /* null-terminate the slack space */
 679                 memset(&state->data[state->total_data], 0, 100);
 680
 681                 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
 682         }
 683
 684         if (state->total_param) {
 685
 686                 if (trans_oob(state->total_param, 0, pscnt)
 687                     || trans_oob(smb_len(req->inbuf), psoff, pscnt)) {
 688                         goto bad_param;
 689                 }
 690
 691                 /* Can't use talloc here, the core routines do realloc on the
 692                  * params and data. Out of paranoia, 100 bytes too many */
 693                 state->param = (char *)SMB_MALLOC(state->total_param+100);
 694                 if (state->param == NULL) {
 695                         DEBUG(0,("reply_trans: param malloc fail for %u "
 696                                  "bytes !\n", (unsigned int)state->total_param));
 697                         SAFE_FREE(state->data);
 698                         TALLOC_FREE(state);
 699                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 700                         END_PROFILE(SMBtrans);
 701                         return;
 702                 }
 703                 /* null-terminate the slack space */
 704                 memset(&state->param[state->total_param], 0, 100);
 705
 706                 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
 707         }
 708
 709         state->received_data  = dscnt;
 710         state->received_param = pscnt;
 711
 712         if (state->setup_count) {
 713                 unsigned int i;
 714
 715                 /*
 716                  * No overflow possible here, state->setup_count is an
 717                  * unsigned int, being filled by a single byte from
 718                  * CVAL(req->vwv+13, 0) above. The cast in the comparison
 719                  * below is not necessary, it's here to clarify things. The
 720                  * validity of req->vwv and req->wct has been checked in
 721                  * init_smb_request already.
 722                  */
 723                 if (state->setup_count + 14 > (unsigned int)req->wct) {
 724                         goto bad_param;
 725                 }
 726
 727                 if((state->setup = TALLOC_ARRAY(
 728                             state, uint16, state->setup_count)) == NULL) {
 729                         DEBUG(0,("reply_trans: setup malloc fail for %u "
 730                                  "bytes !\n", (unsigned int)
 731                                  (state->setup_count * sizeof(uint16))));
 732                         SAFE_FREE(state->data);
 733                         SAFE_FREE(state->param);
 734                         TALLOC_FREE(state);
 735                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 736                         END_PROFILE(SMBtrans);
 737                         return;
 738                 }
 739
 740                 for (i=0;i<state->setup_count;i++) {
 741                         state->setup[i] = SVAL(req->vwv + 14 + i, 0);
 742                 }
 743         }
 744
 745         state->received_param = pscnt;
 746
 747         if ((state->received_param != state->total_param) ||
 748             (state->received_data != state->total_data)) {
 749                 DLIST_ADD(conn->pending_trans, state);
 750
 751                 /* We need to send an interim response then receive the rest
 752                    of the parameter/data bytes */
 753                 reply_outbuf(req, 0, 0);
 754                 show_msg((char *)req->outbuf);
 755                 END_PROFILE(SMBtrans);
 756                 return;
 757         }
 758
 759         talloc_steal(talloc_tos(), state);
 760
 761         handle_trans(conn, req, state);
 762
 763         SAFE_FREE(state->data);
 764         SAFE_FREE(state->param);
 765         TALLOC_FREE(state);
 766
 767         END_PROFILE(SMBtrans);
 768         return;
 769
 770   bad_param:
 771
 772         DEBUG(0,("reply_trans: invalid trans parameters\n"));
 773         SAFE_FREE(state->data);
 774         SAFE_FREE(state->param);
 775         TALLOC_FREE(state);
 776         END_PROFILE(SMBtrans);
 777         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 778         return;
 779 }
 780
 781 /****************************************************************************
 782  Reply to a secondary SMBtrans.
 783  ****************************************************************************/
 784
 785 void reply_transs(struct smb_request *req)
 786 {
 787         connection_struct *conn = req->conn;
 788         unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
 789         struct trans_state *state;
 790
 791         START_PROFILE(SMBtranss);
 792
 793         show_msg((char *)req->inbuf);
 794
 795         if (req->wct < 8) {
 796                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 797                 END_PROFILE(SMBtranss);
 798                 return;
 799         }
 800
 801         for (state = conn->pending_trans; state != NULL;
 802              state = state->next) {
 803                 if (state->mid == req->mid) {
 804                         break;
 805                 }
 806         }
 807
 808         if ((state == NULL) || (state->cmd != SMBtrans)) {
 809                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 810                 END_PROFILE(SMBtranss);
 811                 return;
 812         }
 813
 814         /* Revise total_params and total_data in case they have changed
 815          * downwards */
 816
 817         if (SVAL(req->vwv+0, 0) < state->total_param)
 818                 state->total_param = SVAL(req->vwv+0, 0);
 819         if (SVAL(req->vwv+1, 0) < state->total_data)
 820                 state->total_data = SVAL(req->vwv+1, 0);
 821
 822         pcnt = SVAL(req->vwv+2, 0);
 823         poff = SVAL(req->vwv+3, 0);
 824         pdisp = SVAL(req->vwv+4, 0);
 825
 826         dcnt = SVAL(req->vwv+5, 0);
 827         doff = SVAL(req->vwv+6, 0);
 828         ddisp = SVAL(req->vwv+7, 0);
 829
 830         state->received_param += pcnt;
 831         state->received_data += dcnt;
 832
 833         if ((state->received_data > state->total_data) ||
 834             (state->received_param > state->total_param))
 835                 goto bad_param;
 836
 837         if (pcnt) {
 838                 if (trans_oob(state->total_param, pdisp, pcnt)
 839                     || trans_oob(smb_len(req->inbuf), poff, pcnt)) {
 840                         goto bad_param;
 841                 }
 842                 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,pcnt);
 843         }
 844
 845         if (dcnt) {
 846                 if (trans_oob(state->total_data, ddisp, dcnt)
 847                     || trans_oob(smb_len(req->inbuf), doff, dcnt)) {
 848                         goto bad_param;
 849                 }
 850                 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,dcnt);
 851         }
 852
 853         if ((state->received_param < state->total_param) ||
 854             (state->received_data < state->total_data)) {
 855                 END_PROFILE(SMBtranss);
 856                 return;
 857         }
 858
 859         talloc_steal(talloc_tos(), state);
 860
 861         handle_trans(conn, req, state);
 862
 863         DLIST_REMOVE(conn->pending_trans, state);
 864         SAFE_FREE(state->data);
 865         SAFE_FREE(state->param);
 866         TALLOC_FREE(state);
 867
 868         END_PROFILE(SMBtranss);
 869         return;
 870
 871   bad_param:
 872
 873         DEBUG(0,("reply_transs: invalid trans parameters\n"));
 874         DLIST_REMOVE(conn->pending_trans, state);
 875         SAFE_FREE(state->data);
 876         SAFE_FREE(state->param);
 877         TALLOC_FREE(state);
 878         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 879         END_PROFILE(SMBtranss);
 880         return;
 881 }