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