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/smbd.h"
  29 #include "smbd/globals.h"
  30 #include "smbprofile.h"
  31 #include "rpc_server/srv_pipe_hnd.h"
  32
  33 #define NERR_notsupported 50
  34
  35 static void api_no_reply(connection_struct *conn, struct smb_request *req);
  36
  37 /*******************************************************************
  38  copies parameters and data, as needed, into the smb buffer
  39
  40  *both* the data and params sections should be aligned.  this
  41  is fudged in the rpc pipes by
  42  at present, only the data section is.  this may be a possible
  43  cause of some of the ipc problems being experienced.  lkcl26dec97
  44
  45  ******************************************************************/
  46
  47 static void copy_trans_params_and_data(char *outbuf, int align,
  48                                 char *rparam, int param_offset, int param_len,
  49                                 char *rdata, int data_offset, int data_len)
  50 {
  51         char *copy_into = smb_buf(outbuf);
  52
  53         if(param_len < 0)
  54                 param_len = 0;
  55
  56         if(data_len < 0)
  57                 data_len = 0;
  58
  59         DEBUG(5,("copy_trans_params_and_data: params[%d..%d] data[%d..%d] (align %d)\n",
  60                         param_offset, param_offset + param_len,
  61                         data_offset , data_offset  + data_len,
  62                         align));
  63
  64         *copy_into = '\0';
  65
  66         copy_into += 1;
  67
  68         if (param_len)
  69                 memcpy(copy_into, &rparam[param_offset], param_len);
  70
  71         copy_into += param_len;
  72         if (align) {
  73                 memset(copy_into, '\0', align);
  74         }
  75
  76         copy_into += align;
  77
  78         if (data_len )
  79                 memcpy(copy_into, &rdata[data_offset], data_len);
  80 }
  81
  82 NTSTATUS nt_status_np_pipe(NTSTATUS status)
  83 {
  84         if (NT_STATUS_EQUAL(status, NT_STATUS_CONNECTION_DISCONNECTED)) {
  85                 status = NT_STATUS_PIPE_DISCONNECTED;
  86         } else if (NT_STATUS_EQUAL(status, NT_STATUS_CONNECTION_RESET)) {
  87                 status = NT_STATUS_PIPE_BROKEN;
  88         }
  89
  90         return status;
  91 }
  92
  93 /****************************************************************************
  94  Send a trans reply.
  95  ****************************************************************************/
  96
  97 void send_trans_reply(connection_struct *conn,
  98                       struct smb_request *req,
  99                       char *rparam, int rparam_len,
 100                       char *rdata, int rdata_len,
 101                       bool buffer_too_large)
 102 {
 103         int this_ldata,this_lparam;
 104         int tot_data_sent = 0;
 105         int tot_param_sent = 0;
 106         int align;
 107
 108         int ldata  = rdata  ? rdata_len : 0;
 109         int lparam = rparam ? rparam_len : 0;
 110         struct smbd_server_connection *sconn = req->sconn;
 111         int max_send = sconn->smb1.sessions.max_send;
 112
 113         if (buffer_too_large)
 114                 DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
 115
 116         this_lparam = MIN(lparam,max_send - 500); /* hack */
 117         this_ldata  = MIN(ldata,max_send - (500+this_lparam));
 118
 119         align = ((this_lparam)%4);
 120
 121         reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
 122
 123         /*
 124          * We might have SMBtranss in req which was transferred to the outbuf,
 125          * fix that.
 126          */
 127         SCVAL(req->outbuf, smb_com, SMBtrans);
 128
 129         copy_trans_params_and_data((char *)req->outbuf, align,
 130                                 rparam, tot_param_sent, this_lparam,
 131                                 rdata, tot_data_sent, this_ldata);
 132
 133         SSVAL(req->outbuf,smb_vwv0,lparam);
 134         SSVAL(req->outbuf,smb_vwv1,ldata);
 135         SSVAL(req->outbuf,smb_vwv3,this_lparam);
 136         SSVAL(req->outbuf,smb_vwv4,
 137               smb_offset(smb_buf(req->outbuf)+1, req->outbuf));
 138         SSVAL(req->outbuf,smb_vwv5,0);
 139         SSVAL(req->outbuf,smb_vwv6,this_ldata);
 140         SSVAL(req->outbuf,smb_vwv7,
 141               smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
 142                          req->outbuf));
 143         SSVAL(req->outbuf,smb_vwv8,0);
 144         SSVAL(req->outbuf,smb_vwv9,0);
 145
 146         if (buffer_too_large) {
 147                 error_packet_set((char *)req->outbuf, ERRDOS, ERRmoredata,
 148                                  STATUS_BUFFER_OVERFLOW, __LINE__, __FILE__);
 149         }
 150
 151         show_msg((char *)req->outbuf);
 152         if (!srv_send_smb(sconn, (char *)req->outbuf,
 153                           true, req->seqnum+1,
 154                           IS_CONN_ENCRYPTED(conn), &req->pcd)) {
 155                 exit_server_cleanly("send_trans_reply: srv_send_smb failed.");
 156         }
 157
 158         TALLOC_FREE(req->outbuf);
 159
 160         tot_data_sent = this_ldata;
 161         tot_param_sent = this_lparam;
 162
 163         while (tot_data_sent < ldata || tot_param_sent < lparam)
 164         {
 165                 this_lparam = MIN(lparam-tot_param_sent,
 166                                   max_send - 500); /* hack */
 167                 this_ldata  = MIN(ldata -tot_data_sent,
 168                                   max_send - (500+this_lparam));
 169
 170                 if(this_lparam < 0)
 171                         this_lparam = 0;
 172
 173                 if(this_ldata < 0)
 174                         this_ldata = 0;
 175
 176                 align = (this_lparam%4);
 177
 178                 reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
 179
 180                 /*
 181                  * We might have SMBtranss in req which was transferred to the
 182                  * outbuf, fix that.
 183                  */
 184                 SCVAL(req->outbuf, smb_com, SMBtrans);
 185
 186                 copy_trans_params_and_data((char *)req->outbuf, align,
 187                                            rparam, tot_param_sent, this_lparam,
 188                                            rdata, tot_data_sent, this_ldata);
 189
 190                 SSVAL(req->outbuf,smb_vwv0,lparam);
 191                 SSVAL(req->outbuf,smb_vwv1,ldata);
 192
 193                 SSVAL(req->outbuf,smb_vwv3,this_lparam);
 194                 SSVAL(req->outbuf,smb_vwv4,
 195                       smb_offset(smb_buf(req->outbuf)+1,req->outbuf));
 196                 SSVAL(req->outbuf,smb_vwv5,tot_param_sent);
 197                 SSVAL(req->outbuf,smb_vwv6,this_ldata);
 198                 SSVAL(req->outbuf,smb_vwv7,
 199                       smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
 200                                  req->outbuf));
 201                 SSVAL(req->outbuf,smb_vwv8,tot_data_sent);
 202                 SSVAL(req->outbuf,smb_vwv9,0);
 203
 204                 if (buffer_too_large) {
 205                         error_packet_set((char *)req->outbuf,
 206                                          ERRDOS, ERRmoredata,
 207                                          STATUS_BUFFER_OVERFLOW,
 208                                          __LINE__, __FILE__);
 209                 }
 210
 211                 show_msg((char *)req->outbuf);
 212                 if (!srv_send_smb(sconn, (char *)req->outbuf,
 213                                   true, req->seqnum+1,
 214                                   IS_CONN_ENCRYPTED(conn), &req->pcd))
 215                         exit_server_cleanly("send_trans_reply: srv_send_smb "
 216                                             "failed.");
 217
 218                 tot_data_sent  += this_ldata;
 219                 tot_param_sent += this_lparam;
 220                 TALLOC_FREE(req->outbuf);
 221         }
 222 }
 223
 224 /****************************************************************************
 225  Start the first part of an RPC reply which began with an SMBtrans request.
 226 ****************************************************************************/
 227
 228 struct dcerpc_cmd_state {
 229         struct fake_file_handle *handle;
 230         uint8_t *data;
 231         size_t num_data;
 232         size_t max_read;
 233 };
 234
 235 static void api_dcerpc_cmd_write_done(struct tevent_req *subreq);
 236 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq);
 237
 238 static void api_dcerpc_cmd(connection_struct *conn, struct smb_request *req,
 239                            files_struct *fsp, uint8_t *data, size_t length,
 240                            size_t max_read)
 241 {
 242         struct tevent_req *subreq;
 243         struct dcerpc_cmd_state *state;
 244         bool busy;
 245
 246         if (!fsp_is_np(fsp)) {
 247                 api_no_reply(conn, req);
 248                 return;
 249         }
 250
 251         /*
 252          * Trans requests are only allowed
 253          * if no other Trans or Read is active
 254          */
 255         busy = np_read_in_progress(fsp->fake_file_handle);
 256         if (busy) {
 257                 reply_nterror(req, NT_STATUS_PIPE_BUSY);
 258                 return;
 259         }
 260
 261         state = talloc(req, struct dcerpc_cmd_state);
 262         if (state == NULL) {
 263                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 264                 return;
 265         }
 266         req->async_priv = state;
 267
 268         state->handle = fsp->fake_file_handle;
 269
 270         /*
 271          * This memdup severely sucks. But doing it properly essentially means
 272          * to rewrite lanman.c, something which I don't really want to do now.
 273          */
 274         state->data = (uint8_t *)talloc_memdup(state, data, length);
 275         if (state->data == NULL) {
 276                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 277                 return;
 278         }
 279         state->num_data = length;
 280         state->max_read = max_read;
 281
 282         subreq = np_write_send(state, req->sconn->ev_ctx, state->handle,
 283                                state->data, length);
 284         if (subreq == NULL) {
 285                 TALLOC_FREE(state);
 286                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 287                 return;
 288         }
 289         tevent_req_set_callback(subreq, api_dcerpc_cmd_write_done,
 290                                 talloc_move(conn, &req));
 291 }
 292
 293 static void api_dcerpc_cmd_write_done(struct tevent_req *subreq)
 294 {
 295         struct smb_request *req = tevent_req_callback_data(
 296                 subreq, struct smb_request);
 297         struct dcerpc_cmd_state *state = talloc_get_type_abort(
 298                 req->async_priv, struct dcerpc_cmd_state);
 299         NTSTATUS status;
 300         ssize_t nwritten = -1;
 301
 302         status = np_write_recv(subreq, &nwritten);
 303         TALLOC_FREE(subreq);
 304         if (!NT_STATUS_IS_OK(status) || (nwritten != state->num_data)) {
 305                 DEBUG(10, ("Could not write to pipe: %s (%d/%d)\n",
 306                            nt_errstr(status), (int)state->num_data,
 307                            (int)nwritten));
 308                 reply_nterror(req, NT_STATUS_PIPE_NOT_AVAILABLE);
 309                 goto send;
 310         }
 311
 312         state->data = talloc_realloc(state, state->data, uint8_t,
 313                                            state->max_read);
 314         if (state->data == NULL) {
 315                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 316                 goto send;
 317         }
 318
 319         subreq = np_read_send(state, req->sconn->ev_ctx,
 320                               state->handle, state->data, state->max_read);
 321         if (subreq == NULL) {
 322                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 323                 goto send;
 324         }
 325         tevent_req_set_callback(subreq, api_dcerpc_cmd_read_done, req);
 326         return;
 327
 328  send:
 329         if (!srv_send_smb(
 330                     req->sconn, (char *)req->outbuf,
 331                     true, req->seqnum+1,
 332                     IS_CONN_ENCRYPTED(req->conn) || req->encrypted,
 333                     &req->pcd)) {
 334                 exit_server_cleanly("api_dcerpc_cmd_write_done: "
 335                                     "srv_send_smb failed.");
 336         }
 337         TALLOC_FREE(req);
 338 }
 339
 340 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq)
 341 {
 342         struct smb_request *req = tevent_req_callback_data(
 343                 subreq, struct smb_request);
 344         struct dcerpc_cmd_state *state = talloc_get_type_abort(
 345                 req->async_priv, struct dcerpc_cmd_state);
 346         NTSTATUS status;
 347         ssize_t nread;
 348         bool is_data_outstanding;
 349
 350         status = np_read_recv(subreq, &nread, &is_data_outstanding);
 351         TALLOC_FREE(subreq);
 352
 353         if (!NT_STATUS_IS_OK(status)) {
 354                 DEBUG(10, ("Could not read from to pipe: %s\n",
 355                            nt_errstr(status)));
 356                 reply_nterror(req, status);
 357
 358                 if (!srv_send_smb(req->sconn, (char *)req->outbuf,
 359                                   true, req->seqnum+1,
 360                                   IS_CONN_ENCRYPTED(req->conn)
 361                                   ||req->encrypted, &req->pcd)) {
 362                         exit_server_cleanly("api_dcerpc_cmd_read_done: "
 363                                             "srv_send_smb failed.");
 364                 }
 365                 TALLOC_FREE(req);
 366                 return;
 367         }
 368
 369         send_trans_reply(req->conn, req, NULL, 0, (char *)state->data, nread,
 370                          is_data_outstanding);
 371         TALLOC_FREE(req);
 372 }
 373
 374 /****************************************************************************
 375  WaitNamedPipeHandleState
 376 ****************************************************************************/
 377
 378 static void api_WNPHS(connection_struct *conn, struct smb_request *req,
 379                       struct files_struct *fsp, char *param, int param_len)
 380 {
 381         if (!param || param_len < 2) {
 382                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 383                 return;
 384         }
 385
 386         DEBUG(4,("WaitNamedPipeHandleState priority %x\n",
 387                  (int)SVAL(param,0)));
 388
 389         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 390 }
 391
 392
 393 /****************************************************************************
 394  SetNamedPipeHandleState
 395 ****************************************************************************/
 396
 397 static void api_SNPHS(connection_struct *conn, struct smb_request *req,
 398                       struct files_struct *fsp, char *param, int param_len)
 399 {
 400         if (!param || param_len < 2) {
 401                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 402                 return;
 403         }
 404
 405         DEBUG(4,("SetNamedPipeHandleState to code %x\n", (int)SVAL(param,0)));
 406
 407         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 408 }
 409
 410
 411 /****************************************************************************
 412  When no reply is generated, indicate unsupported.
 413  ****************************************************************************/
 414
 415 static void api_no_reply(connection_struct *conn, struct smb_request *req)
 416 {
 417         char rparam[4];
 418
 419         /* unsupported */
 420         SSVAL(rparam,0,NERR_notsupported);
 421         SSVAL(rparam,2,0); /* converter word */
 422
 423         DEBUG(3,("Unsupported API fd command\n"));
 424
 425         /* now send the reply */
 426         send_trans_reply(conn, req, rparam, 4, NULL, 0, False);
 427
 428         return;
 429 }
 430
 431 /****************************************************************************
 432  Handle remote api calls delivered to a named pipe already opened.
 433  ****************************************************************************/
 434
 435 static void api_fd_reply(connection_struct *conn, uint16 vuid,
 436                          struct smb_request *req,
 437                          uint16 *setup, uint8_t *data, char *params,
 438                          int suwcnt, int tdscnt, int tpscnt,
 439                          int mdrcnt, int mprcnt)
 440 {
 441         struct files_struct *fsp;
 442         int pnum;
 443         int subcommand;
 444
 445         DEBUG(5,("api_fd_reply\n"));
 446
 447         /* First find out the name of this file. */
 448         if (suwcnt != 2) {
 449                 DEBUG(0,("Unexpected named pipe transaction.\n"));
 450                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 451                 return;
 452         }
 453
 454         /* Get the file handle and hence the file name. */
 455         /*
 456          * NB. The setup array has already been transformed
 457          * via SVAL and so is in host byte order.
 458          */
 459         pnum = ((int)setup[1]) & 0xFFFF;
 460         subcommand = ((int)setup[0]) & 0xFFFF;
 461
 462         fsp = file_fsp(req, pnum);
 463
 464         if (!fsp_is_np(fsp)) {
 465                 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
 466                         /* Win9x does this call with a unicode pipe name, not a pnum. */
 467                         /* Just return success for now... */
 468                         DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
 469                         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 470                         return;
 471                 }
 472
 473                 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
 474                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 475                 return;
 476         }
 477
 478         if (vuid != fsp->vuid) {
 479                 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
 480                           "expected %d\n", pnum, vuid, fsp->vuid));
 481                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 482                 return;
 483         }
 484
 485         DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n",
 486                  subcommand, fsp_str_dbg(fsp), pnum));
 487
 488         DEBUG(10, ("api_fd_reply: p:%p max_trans_reply: %d\n", fsp, mdrcnt));
 489
 490         switch (subcommand) {
 491         case TRANSACT_DCERPCCMD: {
 492                 /* dce/rpc command */
 493                 api_dcerpc_cmd(conn, req, fsp, (uint8_t *)data, tdscnt,
 494                                mdrcnt);
 495                 break;
 496         }
 497         case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
 498                 /* Wait Named Pipe Handle state */
 499                 api_WNPHS(conn, req, fsp, params, tpscnt);
 500                 break;
 501         case TRANSACT_SETNAMEDPIPEHANDLESTATE:
 502                 /* Set Named Pipe Handle state */
 503                 api_SNPHS(conn, req, fsp, params, tpscnt);
 504                 break;
 505         default:
 506                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 507                 return;
 508         }
 509 }
 510
 511 /****************************************************************************
 512  Handle named pipe commands.
 513 ****************************************************************************/
 514
 515 static void named_pipe(connection_struct *conn, uint16 vuid,
 516                        struct smb_request *req,
 517                        const char *name, uint16 *setup,
 518                        char *data, char *params,
 519                        int suwcnt, int tdscnt,int tpscnt,
 520                        int msrcnt, int mdrcnt, int mprcnt)
 521 {
 522         DEBUG(3,("named pipe command on <%s> name\n", name));
 523
 524         if (strequal(name,"LANMAN")) {
 525                 api_reply(conn, vuid, req,
 526                           data, params,
 527                           tdscnt, tpscnt,
 528                           mdrcnt, mprcnt);
 529                 return;
 530         }
 531
 532         if (strequal(name,"WKSSVC") ||
 533             strequal(name,"SRVSVC") ||
 534             strequal(name,"WINREG") ||
 535             strequal(name,"SAMR") ||
 536             strequal(name,"LSARPC")) {
 537
 538                 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
 539
 540                 api_fd_reply(conn, vuid, req,
 541                              setup, (uint8_t *)data, params,
 542                              suwcnt, tdscnt, tpscnt,
 543                              mdrcnt, mprcnt);
 544                 return;
 545         }
 546
 547         if (strlen(name) < 1) {
 548                 api_fd_reply(conn, vuid, req,
 549                              setup, (uint8_t *)data,
 550                              params, suwcnt, tdscnt,
 551                              tpscnt, mdrcnt, mprcnt);
 552                 return;
 553         }
 554
 555         if (setup)
 556                 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
 557                          (int)setup[0],(int)setup[1]));
 558
 559         reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 560         return;
 561 }
 562
 563 static void handle_trans(connection_struct *conn, struct smb_request *req,
 564                          struct trans_state *state)
 565 {
 566         char *local_machine_name;
 567         int name_offset = 0;
 568
 569         DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
 570                  state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
 571                  (unsigned int)state->setup_count));
 572
 573         /*
 574          * WinCE wierdness....
 575          */
 576
 577         local_machine_name = talloc_asprintf(state, "\\%s\\",
 578                                              get_local_machine_name());
 579
 580         if (local_machine_name == NULL) {
 581                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 582                 return;
 583         }
 584
 585         if (strnequal(state->name, local_machine_name,
 586                       strlen(local_machine_name))) {
 587                 name_offset = strlen(local_machine_name)-1;
 588         }
 589
 590         if (!strnequal(&state->name[name_offset], "\\PIPE",
 591                        strlen("\\PIPE"))) {
 592                 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 593                 return;
 594         }
 595
 596         name_offset += strlen("\\PIPE");
 597
 598         /* Win9x weirdness.  When talking to a unicode server Win9x
 599            only sends \PIPE instead of \PIPE\ */
 600
 601         if (state->name[name_offset] == '\\')
 602                 name_offset++;
 603
 604         DEBUG(5,("calling named_pipe\n"));
 605         named_pipe(conn, state->vuid, req,
 606                    state->name+name_offset,
 607                    state->setup,state->data,
 608                    state->param,
 609                    state->setup_count,state->total_data,
 610                    state->total_param,
 611                    state->max_setup_return,
 612                    state->max_data_return,
 613                    state->max_param_return);
 614
 615         if (state->close_on_completion) {
 616                 close_cnum(conn,state->vuid);
 617                 req->conn = NULL;
 618         }
 619
 620         return;
 621 }
 622
 623 /****************************************************************************
 624  Reply to a SMBtrans.
 625  ****************************************************************************/
 626
 627 void reply_trans(struct smb_request *req)
 628 {
 629         connection_struct *conn = req->conn;
 630         unsigned int dsoff;
 631         unsigned int dscnt;
 632         unsigned int psoff;
 633         unsigned int pscnt;
 634         struct trans_state *state;
 635         NTSTATUS result;
 636
 637         START_PROFILE(SMBtrans);
 638
 639         if (req->wct < 14) {
 640                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 641                 END_PROFILE(SMBtrans);
 642                 return;
 643         }
 644
 645         dsoff = SVAL(req->vwv+12, 0);
 646         dscnt = SVAL(req->vwv+11, 0);
 647         psoff = SVAL(req->vwv+10, 0);
 648         pscnt = SVAL(req->vwv+9, 0);
 649
 650         result = allow_new_trans(conn->pending_trans, req->mid);
 651         if (!NT_STATUS_IS_OK(result)) {
 652                 DEBUG(2, ("Got invalid trans request: %s\n",
 653                           nt_errstr(result)));
 654                 reply_nterror(req, result);
 655                 END_PROFILE(SMBtrans);
 656                 return;
 657         }
 658
 659         if ((state = talloc(conn, struct trans_state)) == NULL) {
 660                 DEBUG(0, ("talloc failed\n"));
 661                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 662                 END_PROFILE(SMBtrans);
 663                 return;
 664         }
 665
 666         state->cmd = SMBtrans;
 667
 668         state->mid = req->mid;
 669         state->vuid = req->vuid;
 670         state->setup_count = CVAL(req->vwv+13, 0);
 671         state->setup = NULL;
 672         state->total_param = SVAL(req->vwv+0, 0);
 673         state->param = NULL;
 674         state->total_data = SVAL(req->vwv+1, 0);
 675         state->data = NULL;
 676         state->max_param_return = SVAL(req->vwv+2, 0);
 677         state->max_data_return = SVAL(req->vwv+3, 0);
 678         state->max_setup_return = CVAL(req->vwv+4, 0);
 679         state->close_on_completion = BITSETW(req->vwv+5, 0);
 680         state->one_way = BITSETW(req->vwv+5, 1);
 681
 682         srvstr_pull_req_talloc(state, req, &state->name, req->buf,
 683                                STR_TERMINATE);
 684
 685         if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
 686                         !state->name)
 687                 goto bad_param;
 688
 689         if (state->total_data)  {
 690
 691                 if (trans_oob(state->total_data, 0, dscnt)
 692                     || trans_oob(smb_len(req->inbuf), dsoff, dscnt)) {
 693                         goto bad_param;
 694                 }
 695
 696                 /* Can't use talloc here, the core routines do realloc on the
 697                  * params and data. Out of paranoia, 100 bytes too many. */
 698                 state->data = (char *)SMB_MALLOC(state->total_data+100);
 699                 if (state->data == NULL) {
 700                         DEBUG(0,("reply_trans: data malloc fail for %u "
 701                                  "bytes !\n", (unsigned int)state->total_data));
 702                         TALLOC_FREE(state);
 703                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 704                         END_PROFILE(SMBtrans);
 705                         return;
 706                 }
 707                 /* null-terminate the slack space */
 708                 memset(&state->data[state->total_data], 0, 100);
 709
 710                 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
 711         }
 712
 713         if (state->total_param) {
 714
 715                 if (trans_oob(state->total_param, 0, pscnt)
 716                     || trans_oob(smb_len(req->inbuf), psoff, pscnt)) {
 717                         goto bad_param;
 718                 }
 719
 720                 /* Can't use talloc here, the core routines do realloc on the
 721                  * params and data. Out of paranoia, 100 bytes too many */
 722                 state->param = (char *)SMB_MALLOC(state->total_param+100);
 723                 if (state->param == NULL) {
 724                         DEBUG(0,("reply_trans: param malloc fail for %u "
 725                                  "bytes !\n", (unsigned int)state->total_param));
 726                         SAFE_FREE(state->data);
 727                         TALLOC_FREE(state);
 728                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 729                         END_PROFILE(SMBtrans);
 730                         return;
 731                 }
 732                 /* null-terminate the slack space */
 733                 memset(&state->param[state->total_param], 0, 100);
 734
 735                 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
 736         }
 737
 738         state->received_data  = dscnt;
 739         state->received_param = pscnt;
 740
 741         if (state->setup_count) {
 742                 unsigned int i;
 743
 744                 /*
 745                  * No overflow possible here, state->setup_count is an
 746                  * unsigned int, being filled by a single byte from
 747                  * CVAL(req->vwv+13, 0) above. The cast in the comparison
 748                  * below is not necessary, it's here to clarify things. The
 749                  * validity of req->vwv and req->wct has been checked in
 750                  * init_smb_request already.
 751                  */
 752                 if (state->setup_count + 14 > (unsigned int)req->wct) {
 753                         goto bad_param;
 754                 }
 755
 756                 if((state->setup = talloc_array(
 757                             state, uint16, state->setup_count)) == NULL) {
 758                         DEBUG(0,("reply_trans: setup malloc fail for %u "
 759                                  "bytes !\n", (unsigned int)
 760                                  (state->setup_count * sizeof(uint16))));
 761                         SAFE_FREE(state->data);
 762                         SAFE_FREE(state->param);
 763                         TALLOC_FREE(state);
 764                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 765                         END_PROFILE(SMBtrans);
 766                         return;
 767                 }
 768
 769                 for (i=0;i<state->setup_count;i++) {
 770                         state->setup[i] = SVAL(req->vwv + 14 + i, 0);
 771                 }
 772         }
 773
 774         state->received_param = pscnt;
 775
 776         if ((state->received_param != state->total_param) ||
 777             (state->received_data != state->total_data)) {
 778                 DLIST_ADD(conn->pending_trans, state);
 779
 780                 /* We need to send an interim response then receive the rest
 781                    of the parameter/data bytes */
 782                 reply_outbuf(req, 0, 0);
 783                 show_msg((char *)req->outbuf);
 784                 END_PROFILE(SMBtrans);
 785                 return;
 786         }
 787
 788         talloc_steal(talloc_tos(), state);
 789
 790         handle_trans(conn, req, state);
 791
 792         SAFE_FREE(state->data);
 793         SAFE_FREE(state->param);
 794         TALLOC_FREE(state);
 795
 796         END_PROFILE(SMBtrans);
 797         return;
 798
 799   bad_param:
 800
 801         DEBUG(0,("reply_trans: invalid trans parameters\n"));
 802         SAFE_FREE(state->data);
 803         SAFE_FREE(state->param);
 804         TALLOC_FREE(state);
 805         END_PROFILE(SMBtrans);
 806         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 807         return;
 808 }
 809
 810 /****************************************************************************
 811  Reply to a secondary SMBtrans.
 812  ****************************************************************************/
 813
 814 void reply_transs(struct smb_request *req)
 815 {
 816         connection_struct *conn = req->conn;
 817         unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
 818         struct trans_state *state;
 819
 820         START_PROFILE(SMBtranss);
 821
 822         show_msg((const char *)req->inbuf);
 823
 824         if (req->wct < 8) {
 825                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 826                 END_PROFILE(SMBtranss);
 827                 return;
 828         }
 829
 830         for (state = conn->pending_trans; state != NULL;
 831              state = state->next) {
 832                 if (state->mid == req->mid) {
 833                         break;
 834                 }
 835         }
 836
 837         if ((state == NULL) || (state->cmd != SMBtrans)) {
 838                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 839                 END_PROFILE(SMBtranss);
 840                 return;
 841         }
 842
 843         /* Revise total_params and total_data in case they have changed
 844          * downwards */
 845
 846         if (SVAL(req->vwv+0, 0) < state->total_param)
 847                 state->total_param = SVAL(req->vwv+0, 0);
 848         if (SVAL(req->vwv+1, 0) < state->total_data)
 849                 state->total_data = SVAL(req->vwv+1, 0);
 850
 851         pcnt = SVAL(req->vwv+2, 0);
 852         poff = SVAL(req->vwv+3, 0);
 853         pdisp = SVAL(req->vwv+4, 0);
 854
 855         dcnt = SVAL(req->vwv+5, 0);
 856         doff = SVAL(req->vwv+6, 0);
 857         ddisp = SVAL(req->vwv+7, 0);
 858
 859         state->received_param += pcnt;
 860         state->received_data += dcnt;
 861
 862         if ((state->received_data > state->total_data) ||
 863             (state->received_param > state->total_param))
 864                 goto bad_param;
 865
 866         if (pcnt) {
 867                 if (trans_oob(state->total_param, pdisp, pcnt)
 868                     || trans_oob(smb_len(req->inbuf), poff, pcnt)) {
 869                         goto bad_param;
 870                 }
 871                 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,pcnt);
 872         }
 873
 874         if (dcnt) {
 875                 if (trans_oob(state->total_data, ddisp, dcnt)
 876                     || trans_oob(smb_len(req->inbuf), doff, dcnt)) {
 877                         goto bad_param;
 878                 }
 879                 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,dcnt);
 880         }
 881
 882         if ((state->received_param < state->total_param) ||
 883             (state->received_data < state->total_data)) {
 884                 END_PROFILE(SMBtranss);
 885                 return;
 886         }
 887
 888         talloc_steal(talloc_tos(), state);
 889
 890         handle_trans(conn, req, state);
 891
 892         DLIST_REMOVE(conn->pending_trans, state);
 893         SAFE_FREE(state->data);
 894         SAFE_FREE(state->param);
 895         TALLOC_FREE(state);
 896
 897         END_PROFILE(SMBtranss);
 898         return;
 899
 900   bad_param:
 901
 902         DEBUG(0,("reply_transs: invalid trans parameters\n"));
 903         DLIST_REMOVE(conn->pending_trans, state);
 904         SAFE_FREE(state->data);
 905         SAFE_FREE(state->param);
 906         TALLOC_FREE(state);
 907         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 908         END_PROFILE(SMBtranss);
 909         return;
 910 }