source3/smbd/ipc.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Inter-process communication and named pipe handling
   4    Copyright (C) Andrew Tridgell 1992-1998
   5
   6    SMB Version handling
   7    Copyright (C) John H Terpstra 1995-1998
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21    */
  22 /*
  23    This file handles the named pipe and mailslot calls
  24    in the SMBtrans protocol
  25    */
  26
  27 #include "includes.h"
  28 #include "smbd/globals.h"
  29
  30 #define NERR_notsupported 50
  31
  32 static void api_no_reply(connection_struct *conn, struct smb_request *req);
  33
  34 /*******************************************************************
  35  copies parameters and data, as needed, into the smb buffer
  36
  37  *both* the data and params sections should be aligned.  this
  38  is fudged in the rpc pipes by
  39  at present, only the data section is.  this may be a possible
  40  cause of some of the ipc problems being experienced.  lkcl26dec97
  41
  42  ******************************************************************/
  43
  44 static void copy_trans_params_and_data(char *outbuf, int align,
  45                                 char *rparam, int param_offset, int param_len,
  46                                 char *rdata, int data_offset, int data_len)
  47 {
  48         char *copy_into = smb_buf(outbuf);
  49
  50         if(param_len < 0)
  51                 param_len = 0;
  52
  53         if(data_len < 0)
  54                 data_len = 0;
  55
  56         DEBUG(5,("copy_trans_params_and_data: params[%d..%d] data[%d..%d] (align %d)\n",
  57                         param_offset, param_offset + param_len,
  58                         data_offset , data_offset  + data_len,
  59                         align));
  60
  61         *copy_into = '\0';
  62
  63         copy_into += 1;
  64
  65         if (param_len)
  66                 memcpy(copy_into, &rparam[param_offset], param_len);
  67
  68         copy_into += param_len;
  69         if (align) {
  70                 memset(copy_into, '\0', align);
  71         }
  72
  73         copy_into += align;
  74
  75         if (data_len )
  76                 memcpy(copy_into, &rdata[data_offset], data_len);
  77 }
  78
  79 /****************************************************************************
  80  Send a trans reply.
  81  ****************************************************************************/
  82
  83 void send_trans_reply(connection_struct *conn,
  84                       struct smb_request *req,
  85                       char *rparam, int rparam_len,
  86                       char *rdata, int rdata_len,
  87                       bool buffer_too_large)
  88 {
  89         int this_ldata,this_lparam;
  90         int tot_data_sent = 0;
  91         int tot_param_sent = 0;
  92         int align;
  93
  94         int ldata  = rdata  ? rdata_len : 0;
  95         int lparam = rparam ? rparam_len : 0;
  96
  97         if (buffer_too_large)
  98                 DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
  99
 100         this_lparam = MIN(lparam,max_send - 500); /* hack */
 101         this_ldata  = MIN(ldata,max_send - (500+this_lparam));
 102
 103         align = ((this_lparam)%4);
 104
 105         reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
 106
 107         /*
 108          * We might have SMBtranss in req which was transferred to the outbuf,
 109          * fix that.
 110          */
 111         SCVAL(req->outbuf, smb_com, SMBtrans);
 112
 113         copy_trans_params_and_data((char *)req->outbuf, align,
 114                                 rparam, tot_param_sent, this_lparam,
 115                                 rdata, tot_data_sent, this_ldata);
 116
 117         SSVAL(req->outbuf,smb_vwv0,lparam);
 118         SSVAL(req->outbuf,smb_vwv1,ldata);
 119         SSVAL(req->outbuf,smb_vwv3,this_lparam);
 120         SSVAL(req->outbuf,smb_vwv4,
 121               smb_offset(smb_buf(req->outbuf)+1, req->outbuf));
 122         SSVAL(req->outbuf,smb_vwv5,0);
 123         SSVAL(req->outbuf,smb_vwv6,this_ldata);
 124         SSVAL(req->outbuf,smb_vwv7,
 125               smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
 126                          req->outbuf));
 127         SSVAL(req->outbuf,smb_vwv8,0);
 128         SSVAL(req->outbuf,smb_vwv9,0);
 129
 130         if (buffer_too_large) {
 131                 error_packet_set((char *)req->outbuf, ERRDOS, ERRmoredata,
 132                                  STATUS_BUFFER_OVERFLOW, __LINE__, __FILE__);
 133         }
 134
 135         show_msg((char *)req->outbuf);
 136         if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
 137                           IS_CONN_ENCRYPTED(conn), &req->pcd)) {
 138                 exit_server_cleanly("send_trans_reply: srv_send_smb failed.");
 139         }
 140
 141         TALLOC_FREE(req->outbuf);
 142
 143         tot_data_sent = this_ldata;
 144         tot_param_sent = this_lparam;
 145
 146         while (tot_data_sent < ldata || tot_param_sent < lparam)
 147         {
 148                 this_lparam = MIN(lparam-tot_param_sent,
 149                                   max_send - 500); /* hack */
 150                 this_ldata  = MIN(ldata -tot_data_sent,
 151                                   max_send - (500+this_lparam));
 152
 153                 if(this_lparam < 0)
 154                         this_lparam = 0;
 155
 156                 if(this_ldata < 0)
 157                         this_ldata = 0;
 158
 159                 align = (this_lparam%4);
 160
 161                 reply_outbuf(req, 10, 1+align+this_ldata+this_lparam);
 162
 163                 /*
 164                  * We might have SMBtranss in req which was transferred to the
 165                  * outbuf, fix that.
 166                  */
 167                 SCVAL(req->outbuf, smb_com, SMBtrans);
 168
 169                 copy_trans_params_and_data((char *)req->outbuf, align,
 170                                            rparam, tot_param_sent, this_lparam,
 171                                            rdata, tot_data_sent, this_ldata);
 172
 173                 SSVAL(req->outbuf,smb_vwv0,lparam);
 174                 SSVAL(req->outbuf,smb_vwv1,ldata);
 175
 176                 SSVAL(req->outbuf,smb_vwv3,this_lparam);
 177                 SSVAL(req->outbuf,smb_vwv4,
 178                       smb_offset(smb_buf(req->outbuf)+1,req->outbuf));
 179                 SSVAL(req->outbuf,smb_vwv5,tot_param_sent);
 180                 SSVAL(req->outbuf,smb_vwv6,this_ldata);
 181                 SSVAL(req->outbuf,smb_vwv7,
 182                       smb_offset(smb_buf(req->outbuf)+1+this_lparam+align,
 183                                  req->outbuf));
 184                 SSVAL(req->outbuf,smb_vwv8,tot_data_sent);
 185                 SSVAL(req->outbuf,smb_vwv9,0);
 186
 187                 if (buffer_too_large) {
 188                         error_packet_set((char *)req->outbuf,
 189                                          ERRDOS, ERRmoredata,
 190                                          STATUS_BUFFER_OVERFLOW,
 191                                          __LINE__, __FILE__);
 192                 }
 193
 194                 show_msg((char *)req->outbuf);
 195                 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
 196                                   IS_CONN_ENCRYPTED(conn), &req->pcd))
 197                         exit_server_cleanly("send_trans_reply: srv_send_smb "
 198                                             "failed.");
 199
 200                 tot_data_sent  += this_ldata;
 201                 tot_param_sent += this_lparam;
 202                 TALLOC_FREE(req->outbuf);
 203         }
 204 }
 205
 206 /****************************************************************************
 207  Start the first part of an RPC reply which began with an SMBtrans request.
 208 ****************************************************************************/
 209
 210 struct dcerpc_cmd_state {
 211         struct fake_file_handle *handle;
 212         uint8_t *data;
 213         size_t num_data;
 214         size_t max_read;
 215 };
 216
 217 static void api_dcerpc_cmd_write_done(struct tevent_req *subreq);
 218 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq);
 219
 220 static void api_dcerpc_cmd(connection_struct *conn, struct smb_request *req,
 221                            files_struct *fsp, uint8_t *data, size_t length,
 222                            size_t max_read)
 223 {
 224         struct tevent_req *subreq;
 225         struct dcerpc_cmd_state *state;
 226
 227         if (!fsp_is_np(fsp)) {
 228                 api_no_reply(conn, req);
 229                 return;
 230         }
 231
 232         state = talloc(req, struct dcerpc_cmd_state);
 233         if (state == NULL) {
 234                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 235                 return;
 236         }
 237         req->async_priv = state;
 238
 239         state->handle = fsp->fake_file_handle;
 240
 241         /*
 242          * This memdup severely sucks. But doing it properly essentially means
 243          * to rewrite lanman.c, something which I don't really want to do now.
 244          */
 245         state->data = (uint8_t *)talloc_memdup(state, data, length);
 246         if (state->data == NULL) {
 247                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 248                 return;
 249         }
 250         state->num_data = length;
 251         state->max_read = max_read;
 252
 253         subreq = np_write_send(state, smbd_event_context(), state->handle,
 254                                state->data, length);
 255         if (subreq == NULL) {
 256                 TALLOC_FREE(state);
 257                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 258                 return;
 259         }
 260         tevent_req_set_callback(subreq, api_dcerpc_cmd_write_done,
 261                                 talloc_move(conn, &req));
 262 }
 263
 264 static void api_dcerpc_cmd_write_done(struct tevent_req *subreq)
 265 {
 266         struct smb_request *req = tevent_req_callback_data(
 267                 subreq, struct smb_request);
 268         struct dcerpc_cmd_state *state = talloc_get_type_abort(
 269                 req->async_priv, struct dcerpc_cmd_state);
 270         NTSTATUS status;
 271         ssize_t nwritten = -1;
 272
 273         status = np_write_recv(subreq, &nwritten);
 274         TALLOC_FREE(subreq);
 275         if (!NT_STATUS_IS_OK(status) || (nwritten != state->num_data)) {
 276                 DEBUG(10, ("Could not write to pipe: %s (%d/%d)\n",
 277                            nt_errstr(status), (int)state->num_data,
 278                            (int)nwritten));
 279                 reply_nterror(req, NT_STATUS_PIPE_NOT_AVAILABLE);
 280                 goto send;
 281         }
 282
 283         state->data = TALLOC_REALLOC_ARRAY(state, state->data, uint8_t,
 284                                            state->max_read);
 285         if (state->data == NULL) {
 286                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 287                 goto send;
 288         }
 289
 290         subreq = np_read_send(req->conn, smbd_event_context(),
 291                               state->handle, state->data, state->max_read);
 292         if (subreq == NULL) {
 293                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 294                 goto send;
 295         }
 296         tevent_req_set_callback(subreq, api_dcerpc_cmd_read_done, req);
 297         return;
 298
 299  send:
 300         if (!srv_send_smb(
 301                     smbd_server_fd(), (char *)req->outbuf,
 302                     IS_CONN_ENCRYPTED(req->conn) || req->encrypted,
 303                     &req->pcd)) {
 304                 exit_server_cleanly("construct_reply: srv_send_smb failed.");
 305         }
 306         TALLOC_FREE(req);
 307 }
 308
 309 static void api_dcerpc_cmd_read_done(struct tevent_req *subreq)
 310 {
 311         struct smb_request *req = tevent_req_callback_data(
 312                 subreq, struct smb_request);
 313         struct dcerpc_cmd_state *state = talloc_get_type_abort(
 314                 req->async_priv, struct dcerpc_cmd_state);
 315         NTSTATUS status;
 316         ssize_t nread;
 317         bool is_data_outstanding;
 318
 319         status = np_read_recv(subreq, &nread, &is_data_outstanding);
 320         TALLOC_FREE(subreq);
 321
 322         if (!NT_STATUS_IS_OK(status)) {
 323                 DEBUG(10, ("Could not read from to pipe: %s\n",
 324                            nt_errstr(status)));
 325                 reply_nterror(req, status);
 326
 327                 if (!srv_send_smb(smbd_server_fd(), (char *)req->outbuf,
 328                                   IS_CONN_ENCRYPTED(req->conn)
 329                                   ||req->encrypted, &req->pcd)) {
 330                         exit_server_cleanly("construct_reply: srv_send_smb "
 331                                             "failed.");
 332                 }
 333                 TALLOC_FREE(req);
 334                 return;
 335         }
 336
 337         send_trans_reply(req->conn, req, NULL, 0, (char *)state->data, nread,
 338                          is_data_outstanding);
 339         TALLOC_FREE(req);
 340 }
 341
 342 /****************************************************************************
 343  WaitNamedPipeHandleState
 344 ****************************************************************************/
 345
 346 static void api_WNPHS(connection_struct *conn, struct smb_request *req,
 347                       struct files_struct *fsp, char *param, int param_len)
 348 {
 349         if (!param || param_len < 2) {
 350                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 351                 return;
 352         }
 353
 354         DEBUG(4,("WaitNamedPipeHandleState priority %x\n",
 355                  (int)SVAL(param,0)));
 356
 357         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 358 }
 359
 360
 361 /****************************************************************************
 362  SetNamedPipeHandleState
 363 ****************************************************************************/
 364
 365 static void api_SNPHS(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,("SetNamedPipeHandleState to code %x\n", (int)SVAL(param,0)));
 374
 375         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 376 }
 377
 378
 379 /****************************************************************************
 380  When no reply is generated, indicate unsupported.
 381  ****************************************************************************/
 382
 383 static void api_no_reply(connection_struct *conn, struct smb_request *req)
 384 {
 385         char rparam[4];
 386
 387         /* unsupported */
 388         SSVAL(rparam,0,NERR_notsupported);
 389         SSVAL(rparam,2,0); /* converter word */
 390
 391         DEBUG(3,("Unsupported API fd command\n"));
 392
 393         /* now send the reply */
 394         send_trans_reply(conn, req, rparam, 4, NULL, 0, False);
 395
 396         return;
 397 }
 398
 399 /****************************************************************************
 400  Handle remote api calls delivered to a named pipe already opened.
 401  ****************************************************************************/
 402
 403 static void api_fd_reply(connection_struct *conn, uint16 vuid,
 404                          struct smb_request *req,
 405                          uint16 *setup, uint8_t *data, char *params,
 406                          int suwcnt, int tdscnt, int tpscnt,
 407                          int mdrcnt, int mprcnt)
 408 {
 409         struct files_struct *fsp;
 410         int pnum;
 411         int subcommand;
 412
 413         DEBUG(5,("api_fd_reply\n"));
 414
 415         /* First find out the name of this file. */
 416         if (suwcnt != 2) {
 417                 DEBUG(0,("Unexpected named pipe transaction.\n"));
 418                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 419                 return;
 420         }
 421
 422         /* Get the file handle and hence the file name. */
 423         /*
 424          * NB. The setup array has already been transformed
 425          * via SVAL and so is in host byte order.
 426          */
 427         pnum = ((int)setup[1]) & 0xFFFF;
 428         subcommand = ((int)setup[0]) & 0xFFFF;
 429
 430         fsp = file_fsp(req, pnum);
 431
 432         if (!fsp_is_np(fsp)) {
 433                 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
 434                         /* Win9x does this call with a unicode pipe name, not a pnum. */
 435                         /* Just return success for now... */
 436                         DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
 437                         send_trans_reply(conn, req, NULL, 0, NULL, 0, False);
 438                         return;
 439                 }
 440
 441                 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
 442                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 443                 return;
 444         }
 445
 446         if (vuid != fsp->vuid) {
 447                 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
 448                           "expected %d\n", pnum, vuid, fsp->vuid));
 449                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 450                 return;
 451         }
 452
 453         DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n",
 454                  subcommand, fsp->fsp_name, pnum));
 455
 456         DEBUG(10, ("api_fd_reply: p:%p max_trans_reply: %d\n", fsp, mdrcnt));
 457
 458         switch (subcommand) {
 459         case TRANSACT_DCERPCCMD: {
 460                 /* dce/rpc command */
 461                 api_dcerpc_cmd(conn, req, fsp, (uint8_t *)data, tdscnt,
 462                                mdrcnt);
 463                 break;
 464         }
 465         case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
 466                 /* Wait Named Pipe Handle state */
 467                 api_WNPHS(conn, req, fsp, params, tpscnt);
 468                 break;
 469         case TRANSACT_SETNAMEDPIPEHANDLESTATE:
 470                 /* Set Named Pipe Handle state */
 471                 api_SNPHS(conn, req, fsp, params, tpscnt);
 472                 break;
 473         default:
 474                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 475                 return;
 476         }
 477 }
 478
 479 /****************************************************************************
 480  Handle named pipe commands.
 481 ****************************************************************************/
 482
 483 static void named_pipe(connection_struct *conn, uint16 vuid,
 484                        struct smb_request *req,
 485                        const char *name, uint16 *setup,
 486                        char *data, char *params,
 487                        int suwcnt, int tdscnt,int tpscnt,
 488                        int msrcnt, int mdrcnt, int mprcnt)
 489 {
 490         DEBUG(3,("named pipe command on <%s> name\n", name));
 491
 492         if (strequal(name,"LANMAN")) {
 493                 api_reply(conn, vuid, req,
 494                           data, params,
 495                           tdscnt, tpscnt,
 496                           mdrcnt, mprcnt);
 497                 return;
 498         }
 499
 500         if (strequal(name,"WKSSVC") ||
 501             strequal(name,"SRVSVC") ||
 502             strequal(name,"WINREG") ||
 503             strequal(name,"SAMR") ||
 504             strequal(name,"LSARPC")) {
 505
 506                 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
 507
 508                 api_fd_reply(conn, vuid, req,
 509                              setup, (uint8_t *)data, params,
 510                              suwcnt, tdscnt, tpscnt,
 511                              mdrcnt, mprcnt);
 512                 return;
 513         }
 514
 515         if (strlen(name) < 1) {
 516                 api_fd_reply(conn, vuid, req,
 517                              setup, (uint8_t *)data,
 518                              params, suwcnt, tdscnt,
 519                              tpscnt, mdrcnt, mprcnt);
 520                 return;
 521         }
 522
 523         if (setup)
 524                 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
 525                          (int)setup[0],(int)setup[1]));
 526
 527         reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 528         return;
 529 }
 530
 531 static void handle_trans(connection_struct *conn, struct smb_request *req,
 532                          struct trans_state *state)
 533 {
 534         char *local_machine_name;
 535         int name_offset = 0;
 536
 537         DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
 538                  state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
 539                  (unsigned int)state->setup_count));
 540
 541         /*
 542          * WinCE wierdness....
 543          */
 544
 545         local_machine_name = talloc_asprintf(state, "\\%s\\",
 546                                              get_local_machine_name());
 547
 548         if (local_machine_name == NULL) {
 549                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 550                 return;
 551         }
 552
 553         if (strnequal(state->name, local_machine_name,
 554                       strlen(local_machine_name))) {
 555                 name_offset = strlen(local_machine_name)-1;
 556         }
 557
 558         if (!strnequal(&state->name[name_offset], "\\PIPE",
 559                        strlen("\\PIPE"))) {
 560                 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 561                 return;
 562         }
 563
 564         name_offset += strlen("\\PIPE");
 565
 566         /* Win9x weirdness.  When talking to a unicode server Win9x
 567            only sends \PIPE instead of \PIPE\ */
 568
 569         if (state->name[name_offset] == '\\')
 570                 name_offset++;
 571
 572         DEBUG(5,("calling named_pipe\n"));
 573         named_pipe(conn, state->vuid, req,
 574                    state->name+name_offset,
 575                    state->setup,state->data,
 576                    state->param,
 577                    state->setup_count,state->total_data,
 578                    state->total_param,
 579                    state->max_setup_return,
 580                    state->max_data_return,
 581                    state->max_param_return);
 582
 583         if (state->close_on_completion) {
 584                 close_cnum(conn,state->vuid);
 585                 req->conn = NULL;
 586         }
 587
 588         return;
 589 }
 590
 591 /****************************************************************************
 592  Reply to a SMBtrans.
 593  ****************************************************************************/
 594
 595 void reply_trans(struct smb_request *req)
 596 {
 597         connection_struct *conn = req->conn;
 598         unsigned int dsoff;
 599         unsigned int dscnt;
 600         unsigned int psoff;
 601         unsigned int pscnt;
 602         struct trans_state *state;
 603         NTSTATUS result;
 604
 605         START_PROFILE(SMBtrans);
 606
 607         if (req->wct < 14) {
 608                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 609                 END_PROFILE(SMBtrans);
 610                 return;
 611         }
 612
 613         dsoff = SVAL(req->vwv+12, 0);
 614         dscnt = SVAL(req->vwv+11, 0);
 615         psoff = SVAL(req->vwv+10, 0);
 616         pscnt = SVAL(req->vwv+9, 0);
 617
 618         result = allow_new_trans(conn->pending_trans, req->mid);
 619         if (!NT_STATUS_IS_OK(result)) {
 620                 DEBUG(2, ("Got invalid trans request: %s\n",
 621                           nt_errstr(result)));
 622                 reply_nterror(req, result);
 623                 END_PROFILE(SMBtrans);
 624                 return;
 625         }
 626
 627         if ((state = TALLOC_P(conn, struct trans_state)) == NULL) {
 628                 DEBUG(0, ("talloc failed\n"));
 629                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 630                 END_PROFILE(SMBtrans);
 631                 return;
 632         }
 633
 634         state->cmd = SMBtrans;
 635
 636         state->mid = req->mid;
 637         state->vuid = req->vuid;
 638         state->setup_count = CVAL(req->vwv+13, 0);
 639         state->setup = NULL;
 640         state->total_param = SVAL(req->vwv+0, 0);
 641         state->param = NULL;
 642         state->total_data = SVAL(req->vwv+1, 0);
 643         state->data = NULL;
 644         state->max_param_return = SVAL(req->vwv+2, 0);
 645         state->max_data_return = SVAL(req->vwv+3, 0);
 646         state->max_setup_return = CVAL(req->vwv+4, 0);
 647         state->close_on_completion = BITSETW(req->vwv+5, 0);
 648         state->one_way = BITSETW(req->vwv+5, 1);
 649
 650         srvstr_pull_req_talloc(state, req, &state->name, req->buf,
 651                                STR_TERMINATE);
 652
 653         if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
 654                         !state->name)
 655                 goto bad_param;
 656
 657         if (state->total_data)  {
 658
 659                 if (trans_oob(state->total_data, 0, dscnt)
 660                     || trans_oob(smb_len(req->inbuf), dsoff, dscnt)) {
 661                         goto bad_param;
 662                 }
 663
 664                 /* Can't use talloc here, the core routines do realloc on the
 665                  * params and data. Out of paranoia, 100 bytes too many. */
 666                 state->data = (char *)SMB_MALLOC(state->total_data+100);
 667                 if (state->data == NULL) {
 668                         DEBUG(0,("reply_trans: data malloc fail for %u "
 669                                  "bytes !\n", (unsigned int)state->total_data));
 670                         TALLOC_FREE(state);
 671                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 672                         END_PROFILE(SMBtrans);
 673                         return;
 674                 }
 675                 /* null-terminate the slack space */
 676                 memset(&state->data[state->total_data], 0, 100);
 677
 678                 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
 679         }
 680
 681         if (state->total_param) {
 682
 683                 if (trans_oob(state->total_param, 0, pscnt)
 684                     || trans_oob(smb_len(req->inbuf), psoff, pscnt)) {
 685                         goto bad_param;
 686                 }
 687
 688                 /* Can't use talloc here, the core routines do realloc on the
 689                  * params and data. Out of paranoia, 100 bytes too many */
 690                 state->param = (char *)SMB_MALLOC(state->total_param+100);
 691                 if (state->param == NULL) {
 692                         DEBUG(0,("reply_trans: param malloc fail for %u "
 693                                  "bytes !\n", (unsigned int)state->total_param));
 694                         SAFE_FREE(state->data);
 695                         TALLOC_FREE(state);
 696                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 697                         END_PROFILE(SMBtrans);
 698                         return;
 699                 }
 700                 /* null-terminate the slack space */
 701                 memset(&state->param[state->total_param], 0, 100);
 702
 703                 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
 704         }
 705
 706         state->received_data  = dscnt;
 707         state->received_param = pscnt;
 708
 709         if (state->setup_count) {
 710                 unsigned int i;
 711
 712                 /*
 713                  * No overflow possible here, state->setup_count is an
 714                  * unsigned int, being filled by a single byte from
 715                  * CVAL(req->vwv+13, 0) above. The cast in the comparison
 716                  * below is not necessary, it's here to clarify things. The
 717                  * validity of req->vwv and req->wct has been checked in
 718                  * init_smb_request already.
 719                  */
 720                 if (state->setup_count + 14 > (unsigned int)req->wct) {
 721                         goto bad_param;
 722                 }
 723
 724                 if((state->setup = TALLOC_ARRAY(
 725                             state, uint16, state->setup_count)) == NULL) {
 726                         DEBUG(0,("reply_trans: setup malloc fail for %u "
 727                                  "bytes !\n", (unsigned int)
 728                                  (state->setup_count * sizeof(uint16))));
 729                         SAFE_FREE(state->data);
 730                         SAFE_FREE(state->param);
 731                         TALLOC_FREE(state);
 732                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 733                         END_PROFILE(SMBtrans);
 734                         return;
 735                 }
 736
 737                 for (i=0;i<state->setup_count;i++) {
 738                         state->setup[i] = SVAL(req->vwv + 14 + i, 0);
 739                 }
 740         }
 741
 742         state->received_param = pscnt;
 743
 744         if ((state->received_param != state->total_param) ||
 745             (state->received_data != state->total_data)) {
 746                 DLIST_ADD(conn->pending_trans, state);
 747
 748                 /* We need to send an interim response then receive the rest
 749                    of the parameter/data bytes */
 750                 reply_outbuf(req, 0, 0);
 751                 show_msg((char *)req->outbuf);
 752                 END_PROFILE(SMBtrans);
 753                 return;
 754         }
 755
 756         talloc_steal(talloc_tos(), state);
 757
 758         handle_trans(conn, req, state);
 759
 760         SAFE_FREE(state->data);
 761         SAFE_FREE(state->param);
 762         TALLOC_FREE(state);
 763
 764         END_PROFILE(SMBtrans);
 765         return;
 766
 767   bad_param:
 768
 769         DEBUG(0,("reply_trans: invalid trans parameters\n"));
 770         SAFE_FREE(state->data);
 771         SAFE_FREE(state->param);
 772         TALLOC_FREE(state);
 773         END_PROFILE(SMBtrans);
 774         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 775         return;
 776 }
 777
 778 /****************************************************************************
 779  Reply to a secondary SMBtrans.
 780  ****************************************************************************/
 781
 782 void reply_transs(struct smb_request *req)
 783 {
 784         connection_struct *conn = req->conn;
 785         unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
 786         struct trans_state *state;
 787
 788         START_PROFILE(SMBtranss);
 789
 790         show_msg((char *)req->inbuf);
 791
 792         if (req->wct < 8) {
 793                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 794                 END_PROFILE(SMBtranss);
 795                 return;
 796         }
 797
 798         for (state = conn->pending_trans; state != NULL;
 799              state = state->next) {
 800                 if (state->mid == req->mid) {
 801                         break;
 802                 }
 803         }
 804
 805         if ((state == NULL) || (state->cmd != SMBtrans)) {
 806                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 807                 END_PROFILE(SMBtranss);
 808                 return;
 809         }
 810
 811         /* Revise total_params and total_data in case they have changed
 812          * downwards */
 813
 814         if (SVAL(req->vwv+0, 0) < state->total_param)
 815                 state->total_param = SVAL(req->vwv+0, 0);
 816         if (SVAL(req->vwv+1, 0) < state->total_data)
 817                 state->total_data = SVAL(req->vwv+1, 0);
 818
 819         pcnt = SVAL(req->vwv+2, 0);
 820         poff = SVAL(req->vwv+3, 0);
 821         pdisp = SVAL(req->vwv+4, 0);
 822
 823         dcnt = SVAL(req->vwv+5, 0);
 824         doff = SVAL(req->vwv+6, 0);
 825         ddisp = SVAL(req->vwv+7, 0);
 826
 827         state->received_param += pcnt;
 828         state->received_data += dcnt;
 829
 830         if ((state->received_data > state->total_data) ||
 831             (state->received_param > state->total_param))
 832                 goto bad_param;
 833
 834         if (pcnt) {
 835                 if (trans_oob(state->total_param, pdisp, pcnt)
 836                     || trans_oob(smb_len(req->inbuf), poff, pcnt)) {
 837                         goto bad_param;
 838                 }
 839                 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,pcnt);
 840         }
 841
 842         if (dcnt) {
 843                 if (trans_oob(state->total_data, ddisp, dcnt)
 844                     || trans_oob(smb_len(req->inbuf), doff, dcnt)) {
 845                         goto bad_param;
 846                 }
 847                 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,dcnt);
 848         }
 849
 850         if ((state->received_param < state->total_param) ||
 851             (state->received_data < state->total_data)) {
 852                 END_PROFILE(SMBtranss);
 853                 return;
 854         }
 855
 856         talloc_steal(talloc_tos(), state);
 857
 858         handle_trans(conn, req, state);
 859
 860         DLIST_REMOVE(conn->pending_trans, state);
 861         SAFE_FREE(state->data);
 862         SAFE_FREE(state->param);
 863         TALLOC_FREE(state);
 864
 865         END_PROFILE(SMBtranss);
 866         return;
 867
 868   bad_param:
 869
 870         DEBUG(0,("reply_transs: invalid trans parameters\n"));
 871         DLIST_REMOVE(conn->pending_trans, state);
 872         SAFE_FREE(state->data);
 873         SAFE_FREE(state->param);
 874         TALLOC_FREE(state);
 875         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 876         END_PROFILE(SMBtranss);
 877         return;
 878 }