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