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
  29 extern int max_send;
  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, const uint8_t *inbuf,
  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         char *outbuf;
  94
  95         int ldata  = rdata  ? rdata_len : 0;
  96         int lparam = rparam ? rparam_len : 0;
  97
  98         if (buffer_too_large)
  99                 DEBUG(5,("send_trans_reply: buffer %d too large\n", ldata ));
 100
 101         this_lparam = MIN(lparam,max_send - 500); /* hack */
 102         this_ldata  = MIN(ldata,max_send - (500+this_lparam));
 103
 104         align = ((this_lparam)%4);
 105
 106         if (!create_outbuf(talloc_tos(), (char *)inbuf, &outbuf,
 107                            10, 1+align+this_ldata+this_lparam)) {
 108                 smb_panic("could not allocate outbuf");
 109         }
 110
 111         copy_trans_params_and_data(outbuf, align,
 112                                 rparam, tot_param_sent, this_lparam,
 113                                 rdata, tot_data_sent, this_ldata);
 114
 115         SSVAL(outbuf,smb_vwv0,lparam);
 116         SSVAL(outbuf,smb_vwv1,ldata);
 117         SSVAL(outbuf,smb_vwv3,this_lparam);
 118         SSVAL(outbuf,smb_vwv4,smb_offset(smb_buf(outbuf)+1,outbuf));
 119         SSVAL(outbuf,smb_vwv5,0);
 120         SSVAL(outbuf,smb_vwv6,this_ldata);
 121         SSVAL(outbuf,smb_vwv7,smb_offset(smb_buf(outbuf)+1+this_lparam+align,
 122                                          outbuf));
 123         SSVAL(outbuf,smb_vwv8,0);
 124         SSVAL(outbuf,smb_vwv9,0);
 125
 126         if (buffer_too_large) {
 127                 error_packet_set((char *)outbuf, ERRDOS, ERRmoredata,
 128                                  STATUS_BUFFER_OVERFLOW, __LINE__, __FILE__);
 129         }
 130
 131         show_msg(outbuf);
 132         if (!srv_send_smb(smbd_server_fd(), (char *)outbuf,
 133                           IS_CONN_ENCRYPTED(conn))) {
 134                 exit_server_cleanly("send_trans_reply: srv_send_smb failed.");
 135         }
 136
 137         TALLOC_FREE(outbuf);
 138
 139         tot_data_sent = this_ldata;
 140         tot_param_sent = this_lparam;
 141
 142         while (tot_data_sent < ldata || tot_param_sent < lparam)
 143         {
 144                 this_lparam = MIN(lparam-tot_param_sent,
 145                                   max_send - 500); /* hack */
 146                 this_ldata  = MIN(ldata -tot_data_sent,
 147                                   max_send - (500+this_lparam));
 148
 149                 if(this_lparam < 0)
 150                         this_lparam = 0;
 151
 152                 if(this_ldata < 0)
 153                         this_ldata = 0;
 154
 155                 align = (this_lparam%4);
 156
 157                 if (!create_outbuf(talloc_tos(), (char *)inbuf, &outbuf,
 158                                    10, 1+align+this_ldata+this_lparam)) {
 159                         smb_panic("could not allocate outbuf");
 160                 }
 161
 162                 copy_trans_params_and_data(outbuf, align,
 163                                            rparam, tot_param_sent, this_lparam,
 164                                            rdata, tot_data_sent, this_ldata);
 165
 166                 SSVAL(outbuf,smb_vwv3,this_lparam);
 167                 SSVAL(outbuf,smb_vwv4,smb_offset(smb_buf(outbuf)+1,outbuf));
 168                 SSVAL(outbuf,smb_vwv5,tot_param_sent);
 169                 SSVAL(outbuf,smb_vwv6,this_ldata);
 170                 SSVAL(outbuf,smb_vwv7,
 171                       smb_offset(smb_buf(outbuf)+1+this_lparam+align, outbuf));
 172                 SSVAL(outbuf,smb_vwv8,tot_data_sent);
 173                 SSVAL(outbuf,smb_vwv9,0);
 174
 175                 if (buffer_too_large) {
 176                         error_packet_set(outbuf, ERRDOS, ERRmoredata,
 177                                          STATUS_BUFFER_OVERFLOW,
 178                                          __LINE__, __FILE__);
 179                 }
 180
 181                 show_msg(outbuf);
 182                 if (!srv_send_smb(smbd_server_fd(), outbuf,
 183                                   IS_CONN_ENCRYPTED(conn)))
 184                         exit_server_cleanly("send_trans_reply: srv_send_smb "
 185                                             "failed.");
 186
 187                 tot_data_sent  += this_ldata;
 188                 tot_param_sent += this_lparam;
 189                 TALLOC_FREE(outbuf);
 190         }
 191 }
 192
 193 /****************************************************************************
 194  Start the first part of an RPC reply which began with an SMBtrans request.
 195 ****************************************************************************/
 196
 197 static void api_rpc_trans_reply(connection_struct *conn,
 198                                 struct smb_request *req,
 199                                 files_struct *fsp,
 200                                 int max_trans_reply)
 201 {
 202         bool is_data_outstanding;
 203         uint8_t *rdata = SMB_MALLOC_ARRAY(uint8_t, max_trans_reply);
 204         ssize_t data_len;
 205         NTSTATUS status;
 206
 207         if(rdata == NULL) {
 208                 DEBUG(0,("api_rpc_trans_reply: malloc fail.\n"));
 209                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 210                 return;
 211         }
 212
 213         status = np_read(fsp, rdata, max_trans_reply, &data_len,
 214                          &is_data_outstanding);
 215         if (!NT_STATUS_IS_OK(status)) {
 216                 SAFE_FREE(rdata);
 217                 api_no_reply(conn,req);
 218                 return;
 219         }
 220
 221         send_trans_reply(conn, req->inbuf, NULL, 0, (char *)rdata, data_len,
 222                          is_data_outstanding);
 223         SAFE_FREE(rdata);
 224         return;
 225 }
 226
 227 /****************************************************************************
 228  WaitNamedPipeHandleState
 229 ****************************************************************************/
 230
 231 static void api_WNPHS(connection_struct *conn, struct smb_request *req,
 232                       struct files_struct *fsp, char *param, int param_len)
 233 {
 234         if (!param || param_len < 2) {
 235                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 236                 return;
 237         }
 238
 239         DEBUG(4,("WaitNamedPipeHandleState priority %x\n",
 240                  (int)SVAL(param,0)));
 241
 242         send_trans_reply(conn, req->inbuf, NULL, 0, NULL, 0, False);
 243 }
 244
 245
 246 /****************************************************************************
 247  SetNamedPipeHandleState
 248 ****************************************************************************/
 249
 250 static void api_SNPHS(connection_struct *conn, struct smb_request *req,
 251                       struct files_struct *fsp, char *param, int param_len)
 252 {
 253         if (!param || param_len < 2) {
 254                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 255                 return;
 256         }
 257
 258         DEBUG(4,("SetNamedPipeHandleState to code %x\n", (int)SVAL(param,0)));
 259
 260         send_trans_reply(conn, req->inbuf, NULL, 0, NULL, 0, False);
 261 }
 262
 263
 264 /****************************************************************************
 265  When no reply is generated, indicate unsupported.
 266  ****************************************************************************/
 267
 268 static void api_no_reply(connection_struct *conn, struct smb_request *req)
 269 {
 270         char rparam[4];
 271
 272         /* unsupported */
 273         SSVAL(rparam,0,NERR_notsupported);
 274         SSVAL(rparam,2,0); /* converter word */
 275
 276         DEBUG(3,("Unsupported API fd command\n"));
 277
 278         /* now send the reply */
 279         send_trans_reply(conn, req->inbuf, rparam, 4, NULL, 0, False);
 280
 281         return;
 282 }
 283
 284 /****************************************************************************
 285  Handle remote api calls delivered to a named pipe already opened.
 286  ****************************************************************************/
 287
 288 static void api_fd_reply(connection_struct *conn, uint16 vuid,
 289                          struct smb_request *req,
 290                          uint16 *setup, uint8_t *data, char *params,
 291                          int suwcnt, int tdscnt, int tpscnt,
 292                          int mdrcnt, int mprcnt)
 293 {
 294         struct files_struct *fsp;
 295         int pnum;
 296         int subcommand;
 297         NTSTATUS status;
 298
 299         DEBUG(5,("api_fd_reply\n"));
 300
 301         /* First find out the name of this file. */
 302         if (suwcnt != 2) {
 303                 DEBUG(0,("Unexpected named pipe transaction.\n"));
 304                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 305                 return;
 306         }
 307
 308         /* Get the file handle and hence the file name. */
 309         /*
 310          * NB. The setup array has already been transformed
 311          * via SVAL and so is in host byte order.
 312          */
 313         pnum = ((int)setup[1]) & 0xFFFF;
 314         subcommand = ((int)setup[0]) & 0xFFFF;
 315
 316         fsp = file_fsp(req, pnum);
 317
 318         if (!fsp_is_np(fsp)) {
 319                 if (subcommand == TRANSACT_WAITNAMEDPIPEHANDLESTATE) {
 320                         /* Win9x does this call with a unicode pipe name, not a pnum. */
 321                         /* Just return success for now... */
 322                         DEBUG(3,("Got TRANSACT_WAITNAMEDPIPEHANDLESTATE on text pipe name\n"));
 323                         send_trans_reply(conn, req->inbuf, NULL, 0, NULL, 0,
 324                                          False);
 325                         return;
 326                 }
 327
 328                 DEBUG(1,("api_fd_reply: INVALID PIPE HANDLE: %x\n", pnum));
 329                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 330                 return;
 331         }
 332
 333         if (vuid != fsp->vuid) {
 334                 DEBUG(1, ("Got pipe request (pnum %x) using invalid VUID %d, "
 335                           "expected %d\n", pnum, vuid, fsp->vuid));
 336                 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
 337                 return;
 338         }
 339
 340         DEBUG(3,("Got API command 0x%x on pipe \"%s\" (pnum %x)\n",
 341                  subcommand, fsp->fsp_name, pnum));
 342
 343         DEBUG(10, ("api_fd_reply: p:%p max_trans_reply: %d\n", fsp, mdrcnt));
 344
 345         switch (subcommand) {
 346         case TRANSACT_DCERPCCMD: {
 347                 /* dce/rpc command */
 348                 ssize_t nwritten;
 349                 status = np_write(fsp, data, tdscnt, &nwritten);
 350                 if (!NT_STATUS_IS_OK(status)) {
 351                         api_no_reply(conn, req);
 352                         return;
 353                 }
 354                 api_rpc_trans_reply(conn, req, fsp, mdrcnt);
 355                 break;
 356         }
 357         case TRANSACT_WAITNAMEDPIPEHANDLESTATE:
 358                 /* Wait Named Pipe Handle state */
 359                 api_WNPHS(conn, req, fsp, params, tpscnt);
 360                 break;
 361         case TRANSACT_SETNAMEDPIPEHANDLESTATE:
 362                 /* Set Named Pipe Handle state */
 363                 api_SNPHS(conn, req, fsp, params, tpscnt);
 364                 break;
 365         default:
 366                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 367                 return;
 368         }
 369 }
 370
 371 /****************************************************************************
 372  Handle named pipe commands.
 373 ****************************************************************************/
 374
 375 static void named_pipe(connection_struct *conn, uint16 vuid,
 376                        struct smb_request *req,
 377                        const char *name, uint16 *setup,
 378                        char *data, char *params,
 379                        int suwcnt, int tdscnt,int tpscnt,
 380                        int msrcnt, int mdrcnt, int mprcnt)
 381 {
 382         DEBUG(3,("named pipe command on <%s> name\n", name));
 383
 384         if (strequal(name,"LANMAN")) {
 385                 api_reply(conn, vuid, req,
 386                           data, params,
 387                           tdscnt, tpscnt,
 388                           mdrcnt, mprcnt);
 389                 return;
 390         }
 391
 392         if (strequal(name,"WKSSVC") ||
 393             strequal(name,"SRVSVC") ||
 394             strequal(name,"WINREG") ||
 395             strequal(name,"SAMR") ||
 396             strequal(name,"LSARPC")) {
 397
 398                 DEBUG(4,("named pipe command from Win95 (wow!)\n"));
 399
 400                 api_fd_reply(conn, vuid, req,
 401                              setup, (uint8_t *)data, params,
 402                              suwcnt, tdscnt, tpscnt,
 403                              mdrcnt, mprcnt);
 404                 return;
 405         }
 406
 407         if (strlen(name) < 1) {
 408                 api_fd_reply(conn, vuid, req,
 409                              setup, (uint8_t *)data,
 410                              params, suwcnt, tdscnt,
 411                              tpscnt, mdrcnt, mprcnt);
 412                 return;
 413         }
 414
 415         if (setup)
 416                 DEBUG(3,("unknown named pipe: setup 0x%X setup1=%d\n",
 417                          (int)setup[0],(int)setup[1]));
 418
 419         reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 420         return;
 421 }
 422
 423 static void handle_trans(connection_struct *conn, struct smb_request *req,
 424                          struct trans_state *state)
 425 {
 426         char *local_machine_name;
 427         int name_offset = 0;
 428
 429         DEBUG(3,("trans <%s> data=%u params=%u setup=%u\n",
 430                  state->name,(unsigned int)state->total_data,(unsigned int)state->total_param,
 431                  (unsigned int)state->setup_count));
 432
 433         /*
 434          * WinCE wierdness....
 435          */
 436
 437         local_machine_name = talloc_asprintf(state, "\\%s\\",
 438                                              get_local_machine_name());
 439
 440         if (local_machine_name == NULL) {
 441                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 442                 return;
 443         }
 444
 445         if (strnequal(state->name, local_machine_name,
 446                       strlen(local_machine_name))) {
 447                 name_offset = strlen(local_machine_name)-1;
 448         }
 449
 450         if (!strnequal(&state->name[name_offset], "\\PIPE",
 451                        strlen("\\PIPE"))) {
 452                 reply_nterror(req, NT_STATUS_NOT_SUPPORTED);
 453                 return;
 454         }
 455
 456         name_offset += strlen("\\PIPE");
 457
 458         /* Win9x weirdness.  When talking to a unicode server Win9x
 459            only sends \PIPE instead of \PIPE\ */
 460
 461         if (state->name[name_offset] == '\\')
 462                 name_offset++;
 463
 464         DEBUG(5,("calling named_pipe\n"));
 465         named_pipe(conn, state->vuid, req,
 466                    state->name+name_offset,
 467                    state->setup,state->data,
 468                    state->param,
 469                    state->setup_count,state->total_data,
 470                    state->total_param,
 471                    state->max_setup_return,
 472                    state->max_data_return,
 473                    state->max_param_return);
 474
 475         if (state->close_on_completion) {
 476                 close_cnum(conn,state->vuid);
 477                 req->conn = NULL;
 478         }
 479
 480         return;
 481 }
 482
 483 /****************************************************************************
 484  Reply to a SMBtrans.
 485  ****************************************************************************/
 486
 487 void reply_trans(struct smb_request *req)
 488 {
 489         connection_struct *conn = req->conn;
 490         unsigned int dsoff;
 491         unsigned int dscnt;
 492         unsigned int psoff;
 493         unsigned int pscnt;
 494         struct trans_state *state;
 495         NTSTATUS result;
 496         unsigned int size;
 497         unsigned int av_size;
 498
 499         START_PROFILE(SMBtrans);
 500
 501         if (req->wct < 14) {
 502                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 503                 END_PROFILE(SMBtrans);
 504                 return;
 505         }
 506
 507         size = smb_len(req->inbuf) + 4;
 508         av_size = smb_len(req->inbuf);
 509         dsoff = SVAL(req->inbuf, smb_dsoff);
 510         dscnt = SVAL(req->inbuf, smb_dscnt);
 511         psoff = SVAL(req->inbuf, smb_psoff);
 512         pscnt = SVAL(req->inbuf, smb_pscnt);
 513
 514         result = allow_new_trans(conn->pending_trans, req->mid);
 515         if (!NT_STATUS_IS_OK(result)) {
 516                 DEBUG(2, ("Got invalid trans request: %s\n",
 517                           nt_errstr(result)));
 518                 reply_nterror(req, result);
 519                 END_PROFILE(SMBtrans);
 520                 return;
 521         }
 522
 523         if ((state = TALLOC_P(conn, struct trans_state)) == NULL) {
 524                 DEBUG(0, ("talloc failed\n"));
 525                 reply_nterror(req, NT_STATUS_NO_MEMORY);
 526                 END_PROFILE(SMBtrans);
 527                 return;
 528         }
 529
 530         state->cmd = SMBtrans;
 531
 532         state->mid = req->mid;
 533         state->vuid = req->vuid;
 534         state->setup_count = CVAL(req->inbuf, smb_suwcnt);
 535         state->setup = NULL;
 536         state->total_param = SVAL(req->inbuf, smb_tpscnt);
 537         state->param = NULL;
 538         state->total_data = SVAL(req->inbuf, smb_tdscnt);
 539         state->data = NULL;
 540         state->max_param_return = SVAL(req->inbuf, smb_mprcnt);
 541         state->max_data_return = SVAL(req->inbuf, smb_mdrcnt);
 542         state->max_setup_return = CVAL(req->inbuf, smb_msrcnt);
 543         state->close_on_completion = BITSETW(req->inbuf+smb_vwv5,0);
 544         state->one_way = BITSETW(req->inbuf+smb_vwv5,1);
 545
 546         srvstr_pull_buf_talloc(state, req->inbuf, req->flags2, &state->name,
 547                                req->buf, STR_TERMINATE);
 548
 549         if ((dscnt > state->total_data) || (pscnt > state->total_param) ||
 550                         !state->name)
 551                 goto bad_param;
 552
 553         if (state->total_data)  {
 554                 /* Can't use talloc here, the core routines do realloc on the
 555                  * params and data. Out of paranoia, 100 bytes too many. */
 556                 state->data = (char *)SMB_MALLOC(state->total_data+100);
 557                 if (state->data == NULL) {
 558                         DEBUG(0,("reply_trans: data malloc fail for %u "
 559                                  "bytes !\n", (unsigned int)state->total_data));
 560                         TALLOC_FREE(state);
 561                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 562                         END_PROFILE(SMBtrans);
 563                         return;
 564                 }
 565                 /* null-terminate the slack space */
 566                 memset(&state->data[state->total_data], 0, 100);
 567
 568                 if (dscnt > state->total_data ||
 569                                 dsoff+dscnt < dsoff) {
 570                         goto bad_param;
 571                 }
 572
 573                 if (dsoff > av_size ||
 574                                 dscnt > av_size ||
 575                                 dsoff+dscnt > av_size) {
 576                         goto bad_param;
 577                 }
 578
 579                 memcpy(state->data,smb_base(req->inbuf)+dsoff,dscnt);
 580         }
 581
 582         if (state->total_param) {
 583                 /* Can't use talloc here, the core routines do realloc on the
 584                  * params and data. Out of paranoia, 100 bytes too many */
 585                 state->param = (char *)SMB_MALLOC(state->total_param+100);
 586                 if (state->param == NULL) {
 587                         DEBUG(0,("reply_trans: param malloc fail for %u "
 588                                  "bytes !\n", (unsigned int)state->total_param));
 589                         SAFE_FREE(state->data);
 590                         TALLOC_FREE(state);
 591                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 592                         END_PROFILE(SMBtrans);
 593                         return;
 594                 }
 595                 /* null-terminate the slack space */
 596                 memset(&state->param[state->total_param], 0, 100);
 597
 598                 if (pscnt > state->total_param ||
 599                                 psoff+pscnt < psoff) {
 600                         goto bad_param;
 601                 }
 602
 603                 if (psoff > av_size ||
 604                                 pscnt > av_size ||
 605                                 psoff+pscnt > av_size) {
 606                         goto bad_param;
 607                 }
 608
 609                 memcpy(state->param,smb_base(req->inbuf)+psoff,pscnt);
 610         }
 611
 612         state->received_data  = dscnt;
 613         state->received_param = pscnt;
 614
 615         if (state->setup_count) {
 616                 unsigned int i;
 617                 if((state->setup = TALLOC_ARRAY(
 618                             state, uint16, state->setup_count)) == NULL) {
 619                         DEBUG(0,("reply_trans: setup malloc fail for %u "
 620                                  "bytes !\n", (unsigned int)
 621                                  (state->setup_count * sizeof(uint16))));
 622                         SAFE_FREE(state->data);
 623                         SAFE_FREE(state->param);
 624                         TALLOC_FREE(state);
 625                         reply_nterror(req, NT_STATUS_NO_MEMORY);
 626                         END_PROFILE(SMBtrans);
 627                         return;
 628                 }
 629                 if (req->inbuf+smb_vwv14+(state->setup_count*SIZEOFWORD) >
 630                     req->inbuf + size)
 631                         goto bad_param;
 632                 if ((smb_vwv14+(state->setup_count*SIZEOFWORD) < smb_vwv14) ||
 633                     (smb_vwv14+(state->setup_count*SIZEOFWORD) <
 634                      (state->setup_count*SIZEOFWORD)))
 635                         goto bad_param;
 636
 637                 for (i=0;i<state->setup_count;i++)
 638                         state->setup[i] = SVAL(req->inbuf,
 639                                                smb_vwv14+i*SIZEOFWORD);
 640         }
 641
 642         state->received_param = pscnt;
 643
 644         if ((state->received_param != state->total_param) ||
 645             (state->received_data != state->total_data)) {
 646                 DLIST_ADD(conn->pending_trans, state);
 647
 648                 /* We need to send an interim response then receive the rest
 649                    of the parameter/data bytes */
 650                 reply_outbuf(req, 0, 0);
 651                 show_msg((char *)req->outbuf);
 652                 END_PROFILE(SMBtrans);
 653                 return;
 654         }
 655
 656         handle_trans(conn, req, state);
 657
 658         SAFE_FREE(state->data);
 659         SAFE_FREE(state->param);
 660         TALLOC_FREE(state);
 661
 662         END_PROFILE(SMBtrans);
 663         return;
 664
 665   bad_param:
 666
 667         DEBUG(0,("reply_trans: invalid trans parameters\n"));
 668         SAFE_FREE(state->data);
 669         SAFE_FREE(state->param);
 670         TALLOC_FREE(state);
 671         END_PROFILE(SMBtrans);
 672         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 673         return;
 674 }
 675
 676 /****************************************************************************
 677  Reply to a secondary SMBtrans.
 678  ****************************************************************************/
 679
 680 void reply_transs(struct smb_request *req)
 681 {
 682         connection_struct *conn = req->conn;
 683         unsigned int pcnt,poff,dcnt,doff,pdisp,ddisp;
 684         struct trans_state *state;
 685         unsigned int av_size;
 686
 687         START_PROFILE(SMBtranss);
 688
 689         show_msg((char *)req->inbuf);
 690
 691         if (req->wct < 8) {
 692                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 693                 END_PROFILE(SMBtranss);
 694                 return;
 695         }
 696
 697         for (state = conn->pending_trans; state != NULL;
 698              state = state->next) {
 699                 if (state->mid == req->mid) {
 700                         break;
 701                 }
 702         }
 703
 704         if ((state == NULL) || (state->cmd != SMBtrans)) {
 705                 reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 706                 END_PROFILE(SMBtranss);
 707                 return;
 708         }
 709
 710         /* Revise total_params and total_data in case they have changed
 711          * downwards */
 712
 713         if (SVAL(req->inbuf, smb_vwv0) < state->total_param)
 714                 state->total_param = SVAL(req->inbuf,smb_vwv0);
 715         if (SVAL(req->inbuf, smb_vwv1) < state->total_data)
 716                 state->total_data = SVAL(req->inbuf,smb_vwv1);
 717
 718         av_size = smb_len(req->inbuf);
 719
 720         pcnt = SVAL(req->inbuf, smb_spscnt);
 721         poff = SVAL(req->inbuf, smb_spsoff);
 722         pdisp = SVAL(req->inbuf, smb_spsdisp);
 723
 724         dcnt = SVAL(req->inbuf, smb_sdscnt);
 725         doff = SVAL(req->inbuf, smb_sdsoff);
 726         ddisp = SVAL(req->inbuf, smb_sdsdisp);
 727
 728         state->received_param += pcnt;
 729         state->received_data += dcnt;
 730
 731         if ((state->received_data > state->total_data) ||
 732             (state->received_param > state->total_param))
 733                 goto bad_param;
 734
 735         if (pcnt) {
 736                 if (pdisp > state->total_param ||
 737                                 pcnt > state->total_param ||
 738                                 pdisp+pcnt > state->total_param ||
 739                                 pdisp+pcnt < pdisp) {
 740                         goto bad_param;
 741                 }
 742
 743                 if (poff > av_size ||
 744                                 pcnt > av_size ||
 745                                 poff+pcnt > av_size ||
 746                                 poff+pcnt < poff) {
 747                         goto bad_param;
 748                 }
 749
 750                 memcpy(state->param+pdisp,smb_base(req->inbuf)+poff,
 751                        pcnt);
 752         }
 753
 754         if (dcnt) {
 755                 if (ddisp > state->total_data ||
 756                                 dcnt > state->total_data ||
 757                                 ddisp+dcnt > state->total_data ||
 758                                 ddisp+dcnt < ddisp) {
 759                         goto bad_param;
 760                 }
 761
 762                 if (ddisp > av_size ||
 763                                 dcnt > av_size ||
 764                                 ddisp+dcnt > av_size ||
 765                                 ddisp+dcnt < ddisp) {
 766                         goto bad_param;
 767                 }
 768
 769                 memcpy(state->data+ddisp, smb_base(req->inbuf)+doff,
 770                        dcnt);
 771         }
 772
 773         if ((state->received_param < state->total_param) ||
 774             (state->received_data < state->total_data)) {
 775                 END_PROFILE(SMBtranss);
 776                 return;
 777         }
 778
 779         /*
 780          * construct_reply_common will copy smb_com from inbuf to
 781          * outbuf. SMBtranss is wrong here.
 782          */
 783         SCVAL(req->inbuf,smb_com,SMBtrans);
 784
 785         handle_trans(conn, req, state);
 786
 787         DLIST_REMOVE(conn->pending_trans, state);
 788         SAFE_FREE(state->data);
 789         SAFE_FREE(state->param);
 790         TALLOC_FREE(state);
 791
 792         END_PROFILE(SMBtranss);
 793         return;
 794
 795   bad_param:
 796
 797         DEBUG(0,("reply_transs: invalid trans parameters\n"));
 798         DLIST_REMOVE(conn->pending_trans, state);
 799         SAFE_FREE(state->data);
 800         SAFE_FREE(state->param);
 801         TALLOC_FREE(state);
 802         reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
 803         END_PROFILE(SMBtranss);
 804         return;
 805 }