source/libsmb/clitrans.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    client transaction calls
   4    Copyright (C) Andrew Tridgell 1994-1998
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21
  22
  23 /****************************************************************************
  24  Send a SMB trans or trans2 request.
  25 ****************************************************************************/
  26
  27 bool cli_send_trans(struct cli_state *cli, int trans,
  28                     const char *pipe_name,
  29                     int fid, int flags,
  30                     uint16 *setup, unsigned int lsetup, unsigned int msetup,
  31                     const char *param, unsigned int lparam, unsigned int mparam,
  32                     const char *data, unsigned int ldata, unsigned int mdata)
  33 {
  34         unsigned int i;
  35         unsigned int this_ldata,this_lparam;
  36         unsigned int tot_data=0,tot_param=0;
  37         char *outdata,*outparam;
  38         char *p;
  39         int pipe_name_len=0;
  40         uint16 mid;
  41
  42         this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
  43         this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
  44
  45         memset(cli->outbuf,'\0',smb_size);
  46         set_message(cli->outbuf,14+lsetup,0,True);
  47         SCVAL(cli->outbuf,smb_com,trans);
  48         SSVAL(cli->outbuf,smb_tid, cli->cnum);
  49         cli_setup_packet(cli);
  50
  51         /*
  52          * Save the mid we're using. We need this for finding
  53          * signing replies.
  54          */
  55
  56         mid = cli->mid;
  57
  58         if (pipe_name) {
  59                 pipe_name_len = clistr_push(cli, smb_buf(cli->outbuf), pipe_name, -1, STR_TERMINATE);
  60         }
  61
  62         outparam = smb_buf(cli->outbuf)+(trans==SMBtrans ? pipe_name_len : 3);
  63         outdata = outparam+this_lparam;
  64
  65         /* primary request */
  66         SSVAL(cli->outbuf,smb_tpscnt,lparam);   /* tpscnt */
  67         SSVAL(cli->outbuf,smb_tdscnt,ldata);    /* tdscnt */
  68         SSVAL(cli->outbuf,smb_mprcnt,mparam);   /* mprcnt */
  69         SSVAL(cli->outbuf,smb_mdrcnt,mdata);    /* mdrcnt */
  70         SCVAL(cli->outbuf,smb_msrcnt,msetup);   /* msrcnt */
  71         SSVAL(cli->outbuf,smb_flags,flags);     /* flags */
  72         SIVAL(cli->outbuf,smb_timeout,0);               /* timeout */
  73         SSVAL(cli->outbuf,smb_pscnt,this_lparam);       /* pscnt */
  74         SSVAL(cli->outbuf,smb_psoff,smb_offset(outparam,cli->outbuf)); /* psoff */
  75         SSVAL(cli->outbuf,smb_dscnt,this_ldata);        /* dscnt */
  76         SSVAL(cli->outbuf,smb_dsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
  77         SCVAL(cli->outbuf,smb_suwcnt,lsetup);   /* suwcnt */
  78         for (i=0;i<lsetup;i++)          /* setup[] */
  79                 SSVAL(cli->outbuf,smb_setup+i*2,setup[i]);
  80         p = smb_buf(cli->outbuf);
  81         if (trans != SMBtrans) {
  82                 *p++ = 0;  /* put in a null smb_name */
  83                 *p++ = 'D'; *p++ = ' '; /* observed in OS/2 */
  84         }
  85         if (this_lparam)                        /* param[] */
  86                 memcpy(outparam,param,this_lparam);
  87         if (this_ldata)                 /* data[] */
  88                 memcpy(outdata,data,this_ldata);
  89         cli_setup_bcc(cli, outdata+this_ldata);
  90
  91         show_msg(cli->outbuf);
  92
  93         if (!cli_send_smb(cli)) {
  94                 return False;
  95         }
  96
  97         /* Note we're in a trans state. Save the sequence
  98          * numbers for replies. */
  99         client_set_trans_sign_state_on(cli, mid);
 100
 101         if (this_ldata < ldata || this_lparam < lparam) {
 102                 /* receive interim response */
 103                 if (!cli_receive_smb(cli) || cli_is_error(cli)) {
 104                         client_set_trans_sign_state_off(cli, mid);
 105                         return(False);
 106                 }
 107
 108                 tot_data = this_ldata;
 109                 tot_param = this_lparam;
 110
 111                 while (tot_data < ldata || tot_param < lparam)  {
 112                         this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
 113                         this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
 114
 115                         set_message(cli->outbuf,trans==SMBtrans?8:9,0,True);
 116                         SCVAL(cli->outbuf,smb_com,(trans==SMBtrans ? SMBtranss : SMBtranss2));
 117
 118                         outparam = smb_buf(cli->outbuf);
 119                         outdata = outparam+this_lparam;
 120
 121                         /* secondary request */
 122                         SSVAL(cli->outbuf,smb_tpscnt,lparam);   /* tpscnt */
 123                         SSVAL(cli->outbuf,smb_tdscnt,ldata);    /* tdscnt */
 124                         SSVAL(cli->outbuf,smb_spscnt,this_lparam);      /* pscnt */
 125                         SSVAL(cli->outbuf,smb_spsoff,smb_offset(outparam,cli->outbuf)); /* psoff */
 126                         SSVAL(cli->outbuf,smb_spsdisp,tot_param);       /* psdisp */
 127                         SSVAL(cli->outbuf,smb_sdscnt,this_ldata);       /* dscnt */
 128                         SSVAL(cli->outbuf,smb_sdsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
 129                         SSVAL(cli->outbuf,smb_sdsdisp,tot_data);        /* dsdisp */
 130                         if (trans==SMBtrans2)
 131                                 SSVALS(cli->outbuf,smb_sfid,fid);               /* fid */
 132                         if (this_lparam)                        /* param[] */
 133                                 memcpy(outparam,param+tot_param,this_lparam);
 134                         if (this_ldata)                 /* data[] */
 135                                 memcpy(outdata,data+tot_data,this_ldata);
 136                         cli_setup_bcc(cli, outdata+this_ldata);
 137
 138                         /*
 139                          * Save the mid we're using. We need this for finding
 140                          * signing replies.
 141                          */
 142                         mid = cli->mid;
 143
 144                         show_msg(cli->outbuf);
 145                         if (!cli_send_smb(cli)) {
 146                                 client_set_trans_sign_state_off(cli, mid);
 147                                 return False;
 148                         }
 149
 150                         /* Ensure we use the same mid for the secondaries. */
 151                         cli->mid = mid;
 152
 153                         tot_data += this_ldata;
 154                         tot_param += this_lparam;
 155                 }
 156         }
 157
 158         return(True);
 159 }
 160
 161 /****************************************************************************
 162  Receive a SMB trans or trans2 response allocating the necessary memory.
 163 ****************************************************************************/
 164
 165 bool cli_receive_trans(struct cli_state *cli,int trans,
 166                               char **param, unsigned int *param_len,
 167                               char **data, unsigned int *data_len)
 168 {
 169         unsigned int total_data=0;
 170         unsigned int total_param=0;
 171         unsigned int this_data,this_param;
 172         NTSTATUS status;
 173         bool ret = False;
 174
 175         *data_len = *param_len = 0;
 176
 177         if (!cli_receive_smb(cli)) {
 178                 return False;
 179         }
 180
 181         show_msg(cli->inbuf);
 182
 183         /* sanity check */
 184         if (CVAL(cli->inbuf,smb_com) != trans) {
 185                 DEBUG(0,("Expected %s response, got command 0x%02x\n",
 186                          trans==SMBtrans?"SMBtrans":"SMBtrans2",
 187                          CVAL(cli->inbuf,smb_com)));
 188                 return False;
 189         }
 190
 191         /*
 192          * An NT RPC pipe call can return ERRDOS, ERRmoredata
 193          * to a trans call. This is not an error and should not
 194          * be treated as such. Note that STATUS_NO_MORE_FILES is
 195          * returned when a trans2 findfirst/next finishes.
 196          * When setting up an encrypted transport we can also
 197          * see NT_STATUS_MORE_PROCESSING_REQUIRED here.
 198          *
 199          * Vista returns NT_STATUS_INACCESSIBLE_SYSTEM_SHORTCUT if the folder
 200          * "<share>/Users/All Users" is enumerated.  This is a special pseudo
 201          * folder, and the response does not have parameters (nor a parameter
 202          * length).
 203          */
 204         status = cli_nt_error(cli);
 205
 206         if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 207                 if (NT_STATUS_IS_ERR(status) ||
 208                     NT_STATUS_EQUAL(status,STATUS_NO_MORE_FILES) ||
 209                     NT_STATUS_EQUAL(status,NT_STATUS_INACCESSIBLE_SYSTEM_SHORTCUT)) {
 210                         goto out;
 211                 }
 212         }
 213
 214         /* parse out the lengths */
 215         total_data = SVAL(cli->inbuf,smb_tdrcnt);
 216         total_param = SVAL(cli->inbuf,smb_tprcnt);
 217
 218         /* allocate it */
 219         if (total_data!=0) {
 220                 *data = (char *)SMB_REALLOC(*data,total_data);
 221                 if (!(*data)) {
 222                         DEBUG(0,("cli_receive_trans: failed to enlarge data buffer\n"));
 223                         goto out;
 224                 }
 225         }
 226
 227         if (total_param!=0) {
 228                 *param = (char *)SMB_REALLOC(*param,total_param);
 229                 if (!(*param)) {
 230                         DEBUG(0,("cli_receive_trans: failed to enlarge param buffer\n"));
 231                         goto out;
 232                 }
 233         }
 234
 235         for (;;)  {
 236                 this_data = SVAL(cli->inbuf,smb_drcnt);
 237                 this_param = SVAL(cli->inbuf,smb_prcnt);
 238
 239                 if (this_data + *data_len > total_data ||
 240                     this_param + *param_len > total_param) {
 241                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 242                         goto out;
 243                 }
 244
 245                 if (this_data + *data_len < this_data ||
 246                                 this_data + *data_len < *data_len ||
 247                                 this_param + *param_len < this_param ||
 248                                 this_param + *param_len < *param_len) {
 249                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 250                         goto out;
 251                 }
 252
 253                 if (this_data) {
 254                         unsigned int data_offset_out = SVAL(cli->inbuf,smb_drdisp);
 255                         unsigned int data_offset_in = SVAL(cli->inbuf,smb_droff);
 256
 257                         if (data_offset_out > total_data ||
 258                                         data_offset_out + this_data > total_data ||
 259                                         data_offset_out + this_data < data_offset_out ||
 260                                         data_offset_out + this_data < this_data) {
 261                                 DEBUG(1,("Data overflow in cli_receive_trans\n"));
 262                                 goto out;
 263                         }
 264                         if (data_offset_in > cli->bufsize ||
 265                                         data_offset_in + this_data >  cli->bufsize ||
 266                                         data_offset_in + this_data < data_offset_in ||
 267                                         data_offset_in + this_data < this_data) {
 268                                 DEBUG(1,("Data overflow in cli_receive_trans\n"));
 269                                 goto out;
 270                         }
 271
 272                         memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
 273                 }
 274                 if (this_param) {
 275                         unsigned int param_offset_out = SVAL(cli->inbuf,smb_prdisp);
 276                         unsigned int param_offset_in = SVAL(cli->inbuf,smb_proff);
 277
 278                         if (param_offset_out > total_param ||
 279                                         param_offset_out + this_param > total_param ||
 280                                         param_offset_out + this_param < param_offset_out ||
 281                                         param_offset_out + this_param < this_param) {
 282                                 DEBUG(1,("Param overflow in cli_receive_trans\n"));
 283                                 goto out;
 284                         }
 285                         if (param_offset_in > cli->bufsize ||
 286                                         param_offset_in + this_param >  cli->bufsize ||
 287                                         param_offset_in + this_param < param_offset_in ||
 288                                         param_offset_in + this_param < this_param) {
 289                                 DEBUG(1,("Param overflow in cli_receive_trans\n"));
 290                                 goto out;
 291                         }
 292
 293                         memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
 294                 }
 295                 *data_len += this_data;
 296                 *param_len += this_param;
 297
 298                 if (total_data <= *data_len && total_param <= *param_len) {
 299                         ret = True;
 300                         break;
 301                 }
 302
 303                 if (!cli_receive_smb(cli)) {
 304                         goto out;
 305                 }
 306
 307                 show_msg(cli->inbuf);
 308
 309                 /* sanity check */
 310                 if (CVAL(cli->inbuf,smb_com) != trans) {
 311                         DEBUG(0,("Expected %s response, got command 0x%02x\n",
 312                                  trans==SMBtrans?"SMBtrans":"SMBtrans2",
 313                                  CVAL(cli->inbuf,smb_com)));
 314                         goto out;
 315                 }
 316                 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 317                         if (NT_STATUS_IS_ERR(cli_nt_error(cli))) {
 318                                 goto out;
 319                         }
 320                 }
 321
 322                 /* parse out the total lengths again - they can shrink! */
 323                 if (SVAL(cli->inbuf,smb_tdrcnt) < total_data)
 324                         total_data = SVAL(cli->inbuf,smb_tdrcnt);
 325                 if (SVAL(cli->inbuf,smb_tprcnt) < total_param)
 326                         total_param = SVAL(cli->inbuf,smb_tprcnt);
 327
 328                 if (total_data <= *data_len && total_param <= *param_len) {
 329                         ret = True;
 330                         break;
 331                 }
 332         }
 333
 334   out:
 335
 336         client_set_trans_sign_state_off(cli, SVAL(cli->inbuf,smb_mid));
 337         return ret;
 338 }
 339
 340 /****************************************************************************
 341  Send a SMB nttrans request.
 342 ****************************************************************************/
 343
 344 bool cli_send_nt_trans(struct cli_state *cli,
 345                        int function,
 346                        int flags,
 347                        uint16 *setup, unsigned int lsetup, unsigned int msetup,
 348                        char *param, unsigned int lparam, unsigned int mparam,
 349                        char *data, unsigned int ldata, unsigned int mdata)
 350 {
 351         unsigned int i;
 352         unsigned int this_ldata,this_lparam;
 353         unsigned int tot_data=0,tot_param=0;
 354         uint16 mid;
 355         char *outdata,*outparam;
 356
 357         this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
 358         this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
 359
 360         memset(cli->outbuf,'\0',smb_size);
 361         set_message(cli->outbuf,19+lsetup,0,True);
 362         SCVAL(cli->outbuf,smb_com,SMBnttrans);
 363         SSVAL(cli->outbuf,smb_tid, cli->cnum);
 364         cli_setup_packet(cli);
 365
 366         /*
 367          * Save the mid we're using. We need this for finding
 368          * signing replies.
 369          */
 370
 371         mid = cli->mid;
 372
 373         outparam = smb_buf(cli->outbuf)+3;
 374         outdata = outparam+this_lparam;
 375
 376         /* primary request */
 377         SCVAL(cli->outbuf,smb_nt_MaxSetupCount,msetup);
 378         SCVAL(cli->outbuf,smb_nt_Flags,flags);
 379         SIVAL(cli->outbuf,smb_nt_TotalParameterCount, lparam);
 380         SIVAL(cli->outbuf,smb_nt_TotalDataCount, ldata);
 381         SIVAL(cli->outbuf,smb_nt_MaxParameterCount, mparam);
 382         SIVAL(cli->outbuf,smb_nt_MaxDataCount, mdata);
 383         SIVAL(cli->outbuf,smb_nt_ParameterCount, this_lparam);
 384         SIVAL(cli->outbuf,smb_nt_ParameterOffset, smb_offset(outparam,cli->outbuf));
 385         SIVAL(cli->outbuf,smb_nt_DataCount, this_ldata);
 386         SIVAL(cli->outbuf,smb_nt_DataOffset, smb_offset(outdata,cli->outbuf));
 387         SIVAL(cli->outbuf,smb_nt_SetupCount, lsetup);
 388         SIVAL(cli->outbuf,smb_nt_Function, function);
 389         for (i=0;i<lsetup;i++)          /* setup[] */
 390                 SSVAL(cli->outbuf,smb_nt_SetupStart+i*2,setup[i]);
 391
 392         if (this_lparam)                        /* param[] */
 393                 memcpy(outparam,param,this_lparam);
 394         if (this_ldata)                 /* data[] */
 395                 memcpy(outdata,data,this_ldata);
 396
 397         cli_setup_bcc(cli, outdata+this_ldata);
 398
 399         show_msg(cli->outbuf);
 400         if (!cli_send_smb(cli)) {
 401                 return False;
 402         }
 403
 404         /* Note we're in a trans state. Save the sequence
 405          * numbers for replies. */
 406         client_set_trans_sign_state_on(cli, mid);
 407
 408         if (this_ldata < ldata || this_lparam < lparam) {
 409                 /* receive interim response */
 410                 if (!cli_receive_smb(cli) || cli_is_error(cli)) {
 411                         client_set_trans_sign_state_off(cli, mid);
 412                         return(False);
 413                 }
 414
 415                 tot_data = this_ldata;
 416                 tot_param = this_lparam;
 417
 418                 while (tot_data < ldata || tot_param < lparam)  {
 419                         this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
 420                         this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
 421
 422                         set_message(cli->outbuf,18,0,True);
 423                         SCVAL(cli->outbuf,smb_com,SMBnttranss);
 424
 425                         /* XXX - these should probably be aligned */
 426                         outparam = smb_buf(cli->outbuf);
 427                         outdata = outparam+this_lparam;
 428
 429                         /* secondary request */
 430                         SIVAL(cli->outbuf,smb_nts_TotalParameterCount,lparam);
 431                         SIVAL(cli->outbuf,smb_nts_TotalDataCount,ldata);
 432                         SIVAL(cli->outbuf,smb_nts_ParameterCount,this_lparam);
 433                         SIVAL(cli->outbuf,smb_nts_ParameterOffset,smb_offset(outparam,cli->outbuf));
 434                         SIVAL(cli->outbuf,smb_nts_ParameterDisplacement,tot_param);
 435                         SIVAL(cli->outbuf,smb_nts_DataCount,this_ldata);
 436                         SIVAL(cli->outbuf,smb_nts_DataOffset,smb_offset(outdata,cli->outbuf));
 437                         SIVAL(cli->outbuf,smb_nts_DataDisplacement,tot_data);
 438                         if (this_lparam)                        /* param[] */
 439                                 memcpy(outparam,param+tot_param,this_lparam);
 440                         if (this_ldata)                 /* data[] */
 441                                 memcpy(outdata,data+tot_data,this_ldata);
 442                         cli_setup_bcc(cli, outdata+this_ldata);
 443
 444                         /*
 445                          * Save the mid we're using. We need this for finding
 446                          * signing replies.
 447                          */
 448                         mid = cli->mid;
 449
 450                         show_msg(cli->outbuf);
 451
 452                         if (!cli_send_smb(cli)) {
 453                                 client_set_trans_sign_state_off(cli, mid);
 454                                 return False;
 455                         }
 456
 457                         /* Ensure we use the same mid for the secondaries. */
 458                         cli->mid = mid;
 459
 460                         tot_data += this_ldata;
 461                         tot_param += this_lparam;
 462                 }
 463         }
 464
 465         return(True);
 466 }
 467
 468 /****************************************************************************
 469  Receive a SMB nttrans response allocating the necessary memory.
 470 ****************************************************************************/
 471
 472 bool cli_receive_nt_trans(struct cli_state *cli,
 473                           char **param, unsigned int *param_len,
 474                           char **data, unsigned int *data_len)
 475 {
 476         unsigned int total_data=0;
 477         unsigned int total_param=0;
 478         unsigned int this_data,this_param;
 479         uint8 eclass;
 480         uint32 ecode;
 481         bool ret = False;
 482
 483         *data_len = *param_len = 0;
 484
 485         if (!cli_receive_smb(cli)) {
 486                 return False;
 487         }
 488
 489         show_msg(cli->inbuf);
 490
 491         /* sanity check */
 492         if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 493                 DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 494                          CVAL(cli->inbuf,smb_com)));
 495                 return(False);
 496         }
 497
 498         /*
 499          * An NT RPC pipe call can return ERRDOS, ERRmoredata
 500          * to a trans call. This is not an error and should not
 501          * be treated as such.
 502          */
 503         if (cli_is_dos_error(cli)) {
 504                 cli_dos_error(cli, &eclass, &ecode);
 505                 if (!(eclass == ERRDOS && ecode == ERRmoredata)) {
 506                         goto out;
 507                 }
 508         }
 509
 510         /*
 511          * Likewise for NT_STATUS_BUFFER_TOO_SMALL
 512          */
 513         if (cli_is_nt_error(cli)) {
 514                 if (!NT_STATUS_EQUAL(cli_nt_error(cli),
 515                                      NT_STATUS_BUFFER_TOO_SMALL)) {
 516                         goto out;
 517                 }
 518         }
 519
 520         /* parse out the lengths */
 521         total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 522         total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 523
 524         /* allocate it */
 525         if (total_data) {
 526                 *data = (char *)SMB_REALLOC(*data,total_data);
 527                 if (!(*data)) {
 528                         DEBUG(0,("cli_receive_nt_trans: failed to enlarge data buffer to %d\n",total_data));
 529                         goto out;
 530                 }
 531         }
 532
 533         if (total_param) {
 534                 *param = (char *)SMB_REALLOC(*param,total_param);
 535                 if (!(*param)) {
 536                         DEBUG(0,("cli_receive_nt_trans: failed to enlarge param buffer to %d\n", total_param));
 537                         goto out;
 538                 }
 539         }
 540
 541         while (1)  {
 542                 this_data = SVAL(cli->inbuf,smb_ntr_DataCount);
 543                 this_param = SVAL(cli->inbuf,smb_ntr_ParameterCount);
 544
 545                 if (this_data + *data_len > total_data ||
 546                     this_param + *param_len > total_param) {
 547                         DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 548                         goto out;
 549                 }
 550
 551                 if (this_data + *data_len < this_data ||
 552                                 this_data + *data_len < *data_len ||
 553                                 this_param + *param_len < this_param ||
 554                                 this_param + *param_len < *param_len) {
 555                         DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 556                         goto out;
 557                 }
 558
 559                 if (this_data) {
 560                         unsigned int data_offset_out = SVAL(cli->inbuf,smb_ntr_DataDisplacement);
 561                         unsigned int data_offset_in = SVAL(cli->inbuf,smb_ntr_DataOffset);
 562
 563                         if (data_offset_out > total_data ||
 564                                         data_offset_out + this_data > total_data ||
 565                                         data_offset_out + this_data < data_offset_out ||
 566                                         data_offset_out + this_data < this_data) {
 567                                 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 568                                 goto out;
 569                         }
 570                         if (data_offset_in > cli->bufsize ||
 571                                         data_offset_in + this_data >  cli->bufsize ||
 572                                         data_offset_in + this_data < data_offset_in ||
 573                                         data_offset_in + this_data < this_data) {
 574                                 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 575                                 goto out;
 576                         }
 577
 578                         memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
 579                 }
 580
 581                 if (this_param) {
 582                         unsigned int param_offset_out = SVAL(cli->inbuf,smb_ntr_ParameterDisplacement);
 583                         unsigned int param_offset_in = SVAL(cli->inbuf,smb_ntr_ParameterOffset);
 584
 585                         if (param_offset_out > total_param ||
 586                                         param_offset_out + this_param > total_param ||
 587                                         param_offset_out + this_param < param_offset_out ||
 588                                         param_offset_out + this_param < this_param) {
 589                                 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
 590                                 goto out;
 591                         }
 592                         if (param_offset_in > cli->bufsize ||
 593                                         param_offset_in + this_param >  cli->bufsize ||
 594                                         param_offset_in + this_param < param_offset_in ||
 595                                         param_offset_in + this_param < this_param) {
 596                                 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
 597                                 goto out;
 598                         }
 599
 600                         memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
 601                 }
 602
 603                 *data_len += this_data;
 604                 *param_len += this_param;
 605
 606                 if (total_data <= *data_len && total_param <= *param_len) {
 607                         ret = True;
 608                         break;
 609                 }
 610
 611                 if (!cli_receive_smb(cli)) {
 612                         goto out;
 613                 }
 614
 615                 show_msg(cli->inbuf);
 616
 617                 /* sanity check */
 618                 if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 619                         DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 620                                  CVAL(cli->inbuf,smb_com)));
 621                         goto out;
 622                 }
 623                 if (cli_is_dos_error(cli)) {
 624                         cli_dos_error(cli, &eclass, &ecode);
 625                         if(!(eclass == ERRDOS && ecode == ERRmoredata)) {
 626                                 goto out;
 627                         }
 628                 }
 629                 /*
 630                  * Likewise for NT_STATUS_BUFFER_TOO_SMALL
 631                  */
 632                 if (cli_is_nt_error(cli)) {
 633                         if (!NT_STATUS_EQUAL(cli_nt_error(cli),
 634                                              NT_STATUS_BUFFER_TOO_SMALL)) {
 635                                 goto out;
 636                         }
 637                 }
 638
 639                 /* parse out the total lengths again - they can shrink! */
 640                 if (SVAL(cli->inbuf,smb_ntr_TotalDataCount) < total_data)
 641                         total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 642                 if (SVAL(cli->inbuf,smb_ntr_TotalParameterCount) < total_param)
 643                         total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 644
 645                 if (total_data <= *data_len && total_param <= *param_len) {
 646                         ret = True;
 647                         break;
 648                 }
 649         }
 650
 651   out:
 652
 653         client_set_trans_sign_state_off(cli, SVAL(cli->inbuf,smb_mid));
 654         return ret;
 655 }