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)) {
 305                 NTSTATUS old = status;
 306                 status = nt_status_np_pipe(old);
 307
 308                 DEBUG(10, ("Could not write to pipe: %s%s%s\n",
 309                            nt_errstr(old),
 310                            NT_STATUS_EQUAL(old, status)?"":" => ",
 311                            NT_STATUS_EQUAL(old, status)?"":nt_errstr(status)));
 312                 reply_nterror(req, status);
 313                 goto send;
 314         }
 315         if (nwritten != state->num_data) {
 316                 status = NT_STATUS_PIPE_NOT_AVAILABLE;
 317                 DEBUG(10, ("Could not write to pipe: (%d/%d) => %s\n",
 318                            (int)state->num_data,
 319                            (int)nwritten, nt_errstr(status)));
 320                 reply_nterror(req, status);
 321                 goto send;
 322         }
 323
 324         state->data = talloc_realloc(state, state->data, uint8_t,
 325                                            state->max_read);
 326         if (state->data == NULL) {
 327                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 328                 goto send;
 329         }
 330
 331         subreq = np_read_send(state, req->sconn->ev_ctx,
 332                               state->handle, state->data, state->max_read);
 333         if (subreq == NULL) {
 334                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 335                 goto send;
 336         }
 337         tevent_req_set_callback(subreq, api_dcerpc_cmd_read_done, req);
 338         return;
 339
 340  send:
 341         if (!srv_send_smb(
 342                     req->sconn, (char *)req->outbuf,
 343                     true, req->seqnum+1,
 344                     IS_CONN_ENCRYPTED(req->conn) || req->encrypted,
 345                     &req->pcd)) {
 346                 exit_server_cleanly("api_dcerpc_cmd_write_done: "
 347                                     "srv_send_smb failed.");
 348         }
 349         TALLOC_FREE(req);
 350 }
 351
 352 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq)
 353 {
 354         struct smb_request *req = tevent_req_callback_data(
 355                 subreq, struct smb_request);
 356         struct dcerpc_cmd_state *state = talloc_get_type_abort(
 357                 req->async_priv, struct dcerpc_cmd_state);
 358         NTSTATUS status;
 359         ssize_t nread;
 360         bool is_data_outstanding;
 361
 362         status = np_read_recv(subreq, &nread, &is_data_outstanding);
 363         TALLOC_FREE(subreq);
 364
 365         if (!NT_STATUS_IS_OK(status)) {
 366                 NTSTATUS old = status;
 367                 status = nt_status_np_pipe(old);
 368
 369                 DEBUG(10, ("Could not read from to pipe: %s%s%s\n",
 370                            nt_errstr(old),
 371                            NT_STATUS_EQUAL(old, status)?"":" => ",
 372                            NT_STATUS_EQUAL(old, status)?"":nt_errstr(status)));
 373                 reply_nterror(req, status);
 374
 375                 if (!srv_send_smb(req->sconn, (char *)req->outbuf,
 376                                   true, req->seqnum+1,
 377                                   IS_CONN_ENCRYPTED(req->conn)
 378                                   ||req->encrypted, &req->pcd)) {
 379                         exit_server_cleanly("api_dcerpc_cmd_read_done: "
 380                                             "srv_send_smb failed.");
 381                 }
 382                 TALLOC_FREE(req);
 383                 return;
 384         }
 385
 386         send_trans_reply(req->conn, req, NULL, 0, (char *)state->data, nread,
 387                          is_data_outstanding);
 388         TALLOC_FREE(req);
 389 }
 390
 391 /****************************************************************************
 392  WaitNamedPipeHandleState
 393 ****************************************************************************/
 394
 395 static void api_WNPHS(connection_struct *conn, struct smb_request *req,
 396                       struct files_struct *fsp, char *param, int param_len)
 397 {
 398         if (!param || param_len < 2) {
 399                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 400                 return;
 401         }
 402
 403         DEBUG(4,("WaitNamedPipeHandleState priority %x\n",
 404                  (int)SVAL(param,0)));
 405
 406         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 407 }
 408
 409
 410 /****************************************************************************
 411  SetNamedPipeHandleState
 412 ****************************************************************************/
 413
 414 static void api_SNPHS(connection_struct *conn, struct smb_request *req,
 415                       struct files_struct *fsp, char *param, int param_len)
 416 {
 417         if (!param || param_len < 2) {
 418                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 419                 return;
 420         }
 421
 422         DEBUG(4,("SetNamedPipeHandleState to code %x\n", (int)SVAL(param,0)));
 423
 424         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 425 }
 426
 427
 428 /****************************************************************************
 429  When no reply is generated, indicate unsupported.
 430  ****************************************************************************/
 431
 432 static void api_no_reply(connection_struct *conn, struct smb_request *req)
 433 {
 434         char rparam[4];
 435
 436         /* unsupported */
 437         SSVAL(rparam,0,NERR_notsupported);
 438         SSVAL(rparam,2,0); /* converter word */
 439
 440         DEBUG(3,("Unsupported API fd command\n"));
 441
 442         /* now send the reply */
 443         send_trans_reply(conn, req, rparam, 4, NULL, 0, False);
 444
 445         return;
 446 }
 447
 448 /****************************************************************************
 449  Handle remote api calls delivered to a named pipe already opened.
 450  ****************************************************************************/
 451
 452 static void api_fd_reply(connection_struct *conn, uint64_t vuid,
 453                          struct smb_request *req,
 454                          uint16 *setup, uint8_t *data, char *params,
 455                          int suwcnt, int tdscnt, int tpscnt,
 456                          int mdrcnt, int mprcnt)
 457 {
 458         struct files_struct *fsp;
 459         int pnum;
 460         int subcommand;
 461
 462         DEBUG(5,("api_fd_reply\n"));
 463
 464         /* First find out the name of this file. */
 465         if (suwcnt != 2) {
 466                 DEBUG(0,("Unexpected named pipe transaction.\n"));
 467                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 468                 return;
 469         }
 470
 471         /* Get the file handle and hence the file name. */
 472         /*
 473          * NB. The setup array has already been transformed
 474          * via SVAL and so is in host byte order.
 475          */
 476         pnum = ((int)setup[1]) & 0xFFFF;
 477         subcommand = ((int)setup[0]) & 0xFFFF;
 478
 479         fsp = file_fsp(req, pnum);
 480
 481         if (!fsp_is_np(fsp)) {
 482                 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
 483                         /* Win9x does this call with a unicode pipe name, not a pnum. */
 484                         /* Just return success for now... */
 485                         DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
 486                         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 487                         return;
 488                 }
 489
 490                 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
 491                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 492                 return;
 493         }
 494
 495         if (vuid != fsp->vuid) {
 496                 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %llu, "
 497                           "expected %llu\n", pnum, (unsigned long long)vuid,
 498                           (unsigned long long)fsp->vuid));
 499                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 500                 return;
 501         }
 502
 503         DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n",
 504                  subcommand, fsp_str_dbg(fsp), pnum));
 505
 506         DEBUG(10, ("api_fd_reply: p:%p max_trans_reply: %d\n", fsp, mdrcnt));
 507
 508         switch (subcommand) {
 509         case TRANSACT_DCERPCCMD: {
 510                 /* dce/rpc command */
 511                 api_dcerpc_cmd(conn, req, fsp, (uint8_t *)data, tdscnt,
 512                                mdrcnt);
 513                 break;
 514         }
 515         case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
 516                 /* Wait Named Pipe Handle state */
 517                 api_WNPHS(conn, req, fsp, params, tpscnt);
 518                 break;
 519         case TRANSACT_SETNAMEDPIPEHANDLESTATE:
 520                 /* Set Named Pipe Handle state */
 521                 api_SNPHS(conn, req, fsp, params, tpscnt);
 522                 break;
 523         default:
 524                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 525                 return;
 526         }
 527 }
 528
 529 /****************************************************************************
 530  Handle named pipe commands.
 531 ****************************************************************************/
 532
 533 static void named_pipe(connection_struct *conn, uint64_t vuid,
 534                        struct smb_request *req,
 535                        const char *name, uint16 *setup,
 536                        char *data, char *params,
 537                        int suwcnt, int tdscnt,int tpscnt,
 538                        int msrcnt, int mdrcnt, int mprcnt)
 539 {
 540         DEBUG(3,("named pipe command on <%s> name\n", name));
 541
 542         if (strequal(name,"LANMAN")) {
 543                 api_reply(conn, vuid, req,
 544                           data, params,
 545                           tdscnt, tpscnt,
 546                           mdrcnt, mprcnt);
 547                 return;
 548         }
 549
 550         if (strequal(name,"WKSSVC") ||
 551             strequal(name,"SRVSVC") ||
 552             strequal(name,"WINREG") ||
 553             strequal(name,"SAMR") ||
 554             strequal(name,"LSARPC")) {
 555
 556                 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
 557
 558                 api_fd_reply(conn, vuid, req,
 559                              setup, (uint8_t *)data, params,
 560                              suwcnt, tdscnt, tpscnt,
 561                              mdrcnt, mprcnt);
 562                 return;
 563         }
 564
 565         if (strlen(name) < 1) {
 566                 api_fd_reply(conn, vuid, req,
 567                              setup, (uint8_t *)data,
 568                              params, suwcnt, tdscnt,
 569                              tpscnt, mdrcnt, mprcnt);
 570                 return;
 571         }
 572
 573         if (setup)
 574                 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
 575                          (int)setup[0],(int)setup[1]));
 576
 577         reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 578         return;
 579 }
 580
 581 static void handle_trans(connection_struct *conn, struct smb_request *req,
 582                          struct trans_state *state)
 583 {
 584         char *local_machine_name;
 585         int name_offset = 0;
 586
 587         DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
 588                  state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
 589                  (unsigned int)state->setup_count));
 590
 591         /*
 592          * WinCE wierdness....
 593          */
 594
 595         local_machine_name = talloc_asprintf(state, "\\%s\\",
 596                                              get_local_machine_name());
 597
 598         if (local_machine_name == NULL) {
 599                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 600                 return;
 601         }
 602
 603         if (strnequal(state->name, local_machine_name,
 604                       strlen(local_machine_name))) {
 605                 name_offset = strlen(local_machine_name)-1;
 606         }
 607
 608         if (!strnequal(&state->name[name_offset], "\\PIPE",
 609                        strlen("\\PIPE"))) {
 610                 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 611                 return;
 612         }
 613
 614         name_offset += strlen("\\PIPE");
 615
 616         /* Win9x weirdness.  When talking to a unicode server Win9x
 617            only sends \PIPE instead of \PIPE\ */
 618
 619         if (state->name[name_offset] == '\\')
 620                 name_offset++;
 621
 622         DEBUG(5,("calling named_pipe\n"));
 623         named_pipe(conn, state->vuid, req,
 624                    state->name+name_offset,
 625                    state->setup,state->data,
 626                    state->param,
 627                    state->setup_count,state->total_data,
 628                    state->total_param,
 629                    state->max_setup_return,
 630                    state->max_data_return,
 631                    state->max_param_return);
 632
 633         if (state->close_on_completion) {
 634                 struct smbXsrv_tcon *tcon;
 635                 NTSTATUS status;
 636
 637                 tcon = conn->tcon;
 638                 req->conn = NULL;
 639                 conn = NULL;
 640
 641                 /*
 642                  * TODO: cancel all outstanding requests on the tcon
 643                  */
 644                 status = smbXsrv_tcon_disconnect(tcon, state->vuid);
 645                 if (!NT_STATUS_IS_OK(status)) {
 646                         DEBUG(0, ("handle_trans: "
 647                                   "smbXsrv_tcon_disconnect() failed: %s\n",
 648                                   nt_errstr(status)));
 649                         /*
 650                          * If we hit this case, there is something completely
 651                          * wrong, so we better disconnect the transport connection.
 652                          */
 653                         exit_server(__location__ ": smbXsrv_tcon_disconnect failed");
 654                         return;
 655                 }
 656
 657                 TALLOC_FREE(tcon);
 658         }
 659
 660         return;
 661 }
 662
 663 /****************************************************************************
 664  Reply to a SMBtrans.
 665  ****************************************************************************/
 666
 667 void reply_trans(struct smb_request *req)
 668 {
 669         connection_struct *conn = req->conn;
 670         unsigned int dsoff;
 671         unsigned int dscnt;
 672         unsigned int psoff;
 673         unsigned int pscnt;
 674         struct trans_state *state;
 675         NTSTATUS result;
 676
 677         START_PROFILE(SMBtrans);
 678
 679         if (req->wct < 14) {
 680                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 681                 END_PROFILE(SMBtrans);
 682                 return;
 683         }
 684
 685         dsoff = SVAL(req->vwv+12, 0);
 686         dscnt = SVAL(req->vwv+11, 0);
 687         psoff = SVAL(req->vwv+10, 0);
 688         pscnt = SVAL(req->vwv+9, 0);
 689
 690         result = allow_new_trans(conn->pending_trans, req->mid);
 691         if (!NT_STATUS_IS_OK(result)) {
 692                 DEBUG(2, ("Got invalid trans request: %s\n",
 693                           nt_errstr(result)));
 694                 reply_nterror(req, result);
 695                 END_PROFILE(SMBtrans);
 696                 return;
 697         }
 698
 699         if ((state = talloc(conn, struct trans_state)) == NULL) {
 700                 DEBUG(0, ("talloc failed\n"));
 701                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 702                 END_PROFILE(SMBtrans);
 703                 return;
 704         }
 705
 706         state->cmd = SMBtrans;
 707
 708         state->mid = req->mid;
 709         state->vuid = req->vuid;
 710         state->setup_count = CVAL(req->vwv+13, 0);
 711         state->setup = NULL;
 712         state->total_param = SVAL(req->vwv+0, 0);
 713         state->param = NULL;
 714         state->total_data = SVAL(req->vwv+1, 0);
 715         state->data = NULL;
 716         state->max_param_return = SVAL(req->vwv+2, 0);
 717         state->max_data_return = SVAL(req->vwv+3, 0);
 718         state->max_setup_return = CVAL(req->vwv+4, 0);
 719         state->close_on_completion = BITSETW(req->vwv+5, 0);
 720         state->one_way = BITSETW(req->vwv+5, 1);
 721
 722         srvstr_pull_req_talloc(state, req, &state->name, req->buf,
 723                                STR_TERMINATE);
 724
 725         if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
 726                         !state->name)
 727                 goto bad_param;
 728
 729         if (state->total_data)  {
 730
 731                 if (trans_oob(state->total_data, 0, dscnt)
 732                     || trans_oob(smb_len(req->inbuf), dsoff, dscnt)) {
 733                         goto bad_param;
 734                 }
 735
 736                 /* Can't use talloc here, the core routines do realloc on the
 737                  * params and data. Out of paranoia, 100 bytes too many. */
 738                 state->data = (char *)SMB_MALLOC(state->total_data+100);
 739                 if (state->data == NULL) {
 740                         DEBUG(0,("reply_trans: data malloc fail for %u "
 741                                  "bytes !\n", (unsigned int)state->total_data));
 742                         TALLOC_FREE(state);
 743                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 744                         END_PROFILE(SMBtrans);
 745                         return;
 746                 }
 747                 /* null-terminate the slack space */
 748                 memset(&state->data[state->total_data], 0, 100);
 749
 750                 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
 751         }
 752
 753         if (state->total_param) {
 754
 755                 if (trans_oob(state->total_param, 0, pscnt)
 756                     || trans_oob(smb_len(req->inbuf), psoff, pscnt)) {
 757                         goto bad_param;
 758                 }
 759
 760                 /* Can't use talloc here, the core routines do realloc on the
 761                  * params and data. Out of paranoia, 100 bytes too many */
 762                 state->param = (char *)SMB_MALLOC(state->total_param+100);
 763                 if (state->param == NULL) {
 764                         DEBUG(0,("reply_trans: param malloc fail for %u "
 765                                  "bytes !\n", (unsigned int)state->total_param));
 766                         SAFE_FREE(state->data);
 767                         TALLOC_FREE(state);
 768                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 769                         END_PROFILE(SMBtrans);
 770                         return;
 771                 }
 772                 /* null-terminate the slack space */
 773                 memset(&state->param[state->total_param], 0, 100);
 774
 775                 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
 776         }
 777
 778         state->received_data  = dscnt;
 779         state->received_param = pscnt;
 780
 781         if (state->setup_count) {
 782                 unsigned int i;
 783
 784                 /*
 785                  * No overflow possible here, state->setup_count is an
 786                  * unsigned int, being filled by a single byte from
 787                  * CVAL(req->vwv+13, 0) above. The cast in the comparison
 788                  * below is not necessary, it's here to clarify things. The
 789                  * validity of req->vwv and req->wct has been checked in
 790                  * init_smb_request already.
 791                  */
 792                 if (state->setup_count + 14 > (unsigned int)req->wct) {
 793                         goto bad_param;
 794                 }
 795
 796                 if((state->setup = talloc_array(
 797                             state, uint16, state->setup_count)) == NULL) {
 798                         DEBUG(0,("reply_trans: setup malloc fail for %u "
 799                                  "bytes !\n", (unsigned int)
 800                                  (state->setup_count * sizeof(uint16))));
 801                         SAFE_FREE(state->data);
 802                         SAFE_FREE(state->param);
 803                         TALLOC_FREE(state);
 804                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 805                         END_PROFILE(SMBtrans);
 806                         return;
 807                 }
 808
 809                 for (i=0;i<state->setup_count;i++) {
 810                         state->setup[i] = SVAL(req->vwv + 14 + i, 0);
 811                 }
 812         }
 813
 814         state->received_param = pscnt;
 815
 816         if ((state->received_param != state->total_param) ||
 817             (state->received_data != state->total_data)) {
 818                 DLIST_ADD(conn->pending_trans, state);
 819
 820                 /* We need to send an interim response then receive the rest
 821                    of the parameter/data bytes */
 822                 reply_outbuf(req, 0, 0);
 823                 show_msg((char *)req->outbuf);
 824                 END_PROFILE(SMBtrans);
 825                 return;
 826         }
 827
 828         talloc_steal(talloc_tos(), state);
 829
 830         handle_trans(conn, req, state);
 831
 832         SAFE_FREE(state->data);
 833         SAFE_FREE(state->param);
 834         TALLOC_FREE(state);
 835
 836         END_PROFILE(SMBtrans);
 837         return;
 838
 839   bad_param:
 840
 841         DEBUG(0,("reply_trans: invalid trans parameters\n"));
 842         SAFE_FREE(state->data);
 843         SAFE_FREE(state->param);
 844         TALLOC_FREE(state);
 845         END_PROFILE(SMBtrans);
 846         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 847         return;
 848 }
 849
 850 /****************************************************************************
 851  Reply to a secondary SMBtrans.
 852  ****************************************************************************/
 853
 854 void reply_transs(struct smb_request *req)
 855 {
 856         connection_struct *conn = req->conn;
 857         unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
 858         struct trans_state *state;
 859
 860         START_PROFILE(SMBtranss);
 861
 862         show_msg((const char *)req->inbuf);
 863
 864         if (req->wct < 8) {
 865                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 866                 END_PROFILE(SMBtranss);
 867                 return;
 868         }
 869
 870         for (state = conn->pending_trans; state != NULL;
 871              state = state->next) {
 872                 if (state->mid == req->mid) {
 873                         break;
 874                 }
 875         }
 876
 877         if ((state == NULL) || (state->cmd != SMBtrans)) {
 878                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 879                 END_PROFILE(SMBtranss);
 880                 return;
 881         }
 882
 883         /* Revise total_params and total_data in case they have changed
 884          * downwards */
 885
 886         if (SVAL(req->vwv+0, 0) < state->total_param)
 887                 state->total_param = SVAL(req->vwv+0, 0);
 888         if (SVAL(req->vwv+1, 0) < state->total_data)
 889                 state->total_data = SVAL(req->vwv+1, 0);
 890
 891         pcnt = SVAL(req->vwv+2, 0);
 892         poff = SVAL(req->vwv+3, 0);
 893         pdisp = SVAL(req->vwv+4, 0);
 894
 895         dcnt = SVAL(req->vwv+5, 0);
 896         doff = SVAL(req->vwv+6, 0);
 897         ddisp = SVAL(req->vwv+7, 0);
 898
 899         state->received_param += pcnt;
 900         state->received_data += dcnt;
 901
 902         if ((state->received_data > state->total_data) ||
 903             (state->received_param > state->total_param))
 904                 goto bad_param;
 905
 906         if (pcnt) {
 907                 if (trans_oob(state->total_param, pdisp, pcnt)
 908                     || trans_oob(smb_len(req->inbuf), poff, pcnt)) {
 909                         goto bad_param;
 910                 }
 911                 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,pcnt);
 912         }
 913
 914         if (dcnt) {
 915                 if (trans_oob(state->total_data, ddisp, dcnt)
 916                     || trans_oob(smb_len(req->inbuf), doff, dcnt)) {
 917                         goto bad_param;
 918                 }
 919                 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,dcnt);
 920         }
 921
 922         if ((state->received_param < state->total_param) ||
 923             (state->received_data < state->total_data)) {
 924                 END_PROFILE(SMBtranss);
 925                 return;
 926         }
 927
 928         talloc_steal(talloc_tos(), state);
 929
 930         handle_trans(conn, req, state);
 931
 932         DLIST_REMOVE(conn->pending_trans, state);
 933         SAFE_FREE(state->data);
 934         SAFE_FREE(state->param);
 935         TALLOC_FREE(state);
 936
 937         END_PROFILE(SMBtranss);
 938         return;
 939
 940   bad_param:
 941
 942         DEBUG(0,("reply_transs: invalid trans parameters\n"));
 943         DLIST_REMOVE(conn->pending_trans, state);
 944         SAFE_FREE(state->data);
 945         SAFE_FREE(state->param);
 946         TALLOC_FREE(state);
 947         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 948         END_PROFILE(SMBtranss);
 949         return;
 950 }