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