git.maemo.org Git - samba/blob - 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 2 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, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #include "includes.h"
  22
  23
  24 /****************************************************************************
  25  Send a SMB trans or trans2 request.
  26 ****************************************************************************/
  27
  28 BOOL cli_send_trans(struct cli_state *cli, int trans,
  29                     const char *pipe_name,
  30                     int fid, int flags,
  31                     uint16 *setup, unsigned int lsetup, unsigned int msetup,
  32                     const char *param, unsigned int lparam, unsigned int mparam,
  33                     const char *data, unsigned int ldata, unsigned int mdata)
  34 {
  35         unsigned int i;
  36         unsigned int this_ldata,this_lparam;
  37         unsigned int tot_data=0,tot_param=0;
  38         char *outdata,*outparam;
  39         char *p;
  40         int pipe_name_len=0;
  41         uint16 mid;
  42
  43         this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
  44         this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
  45
  46         memset(cli->outbuf,'\0',smb_size);
  47         set_message(cli->outbuf,14+lsetup,0,True);
  48         SCVAL(cli->outbuf,smb_com,trans);
  49         SSVAL(cli->outbuf,smb_tid, cli->cnum);
  50         cli_setup_packet(cli);
  51
  52         /*
  53          * Save the mid we're using. We need this for finding
  54          * signing replies.
  55          */
  56
  57         mid = cli->mid;
  58
  59         if (pipe_name) {
  60                 pipe_name_len = clistr_push(cli, smb_buf(cli->outbuf), pipe_name, -1, STR_TERMINATE);
  61         }
  62
  63         outparam = smb_buf(cli->outbuf)+(trans==SMBtrans ? pipe_name_len : 3);
  64         outdata = outparam+this_lparam;
  65
  66         /* primary request */
  67         SSVAL(cli->outbuf,smb_tpscnt,lparam);   /* tpscnt */
  68         SSVAL(cli->outbuf,smb_tdscnt,ldata);    /* tdscnt */
  69         SSVAL(cli->outbuf,smb_mprcnt,mparam);   /* mprcnt */
  70         SSVAL(cli->outbuf,smb_mdrcnt,mdata);    /* mdrcnt */
  71         SCVAL(cli->outbuf,smb_msrcnt,msetup);   /* msrcnt */
  72         SSVAL(cli->outbuf,smb_flags,flags);     /* flags */
  73         SIVAL(cli->outbuf,smb_timeout,0);               /* timeout */
  74         SSVAL(cli->outbuf,smb_pscnt,this_lparam);       /* pscnt */
  75         SSVAL(cli->outbuf,smb_psoff,smb_offset(outparam,cli->outbuf)); /* psoff */
  76         SSVAL(cli->outbuf,smb_dscnt,this_ldata);        /* dscnt */
  77         SSVAL(cli->outbuf,smb_dsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
  78         SCVAL(cli->outbuf,smb_suwcnt,lsetup);   /* suwcnt */
  79         for (i=0;i<lsetup;i++)          /* setup[] */
  80                 SSVAL(cli->outbuf,smb_setup+i*2,setup[i]);
  81         p = smb_buf(cli->outbuf);
  82         if (trans != SMBtrans) {
  83                 *p++ = 0;  /* put in a null smb_name */
  84                 *p++ = 'D'; *p++ = ' '; /* observed in OS/2 */
  85         }
  86         if (this_lparam)                        /* param[] */
  87                 memcpy(outparam,param,this_lparam);
  88         if (this_ldata)                 /* data[] */
  89                 memcpy(outdata,data,this_ldata);
  90         cli_setup_bcc(cli, outdata+this_ldata);
  91
  92         show_msg(cli->outbuf);
  93
  94         if (!cli_send_smb(cli)) {
  95                 return False;
  96         }
  97
  98         if (this_ldata < ldata || this_lparam < lparam) {
  99                 /* receive interim response */
 100                 if (!cli_receive_smb(cli) || cli_is_error(cli)) {
 101                         return(False);
 102                 }
 103
 104                 tot_data = this_ldata;
 105                 tot_param = this_lparam;
 106
 107                 while (tot_data < ldata || tot_param < lparam)  {
 108                         this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
 109                         this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
 110
 111                         set_message(cli->outbuf,trans==SMBtrans?8:9,0,True);
 112                         SCVAL(cli->outbuf,smb_com,(trans==SMBtrans ? SMBtranss : SMBtranss2));
 113
 114                         outparam = smb_buf(cli->outbuf);
 115                         outdata = outparam+this_lparam;
 116
 117                         /* secondary request */
 118                         SSVAL(cli->outbuf,smb_tpscnt,lparam);   /* tpscnt */
 119                         SSVAL(cli->outbuf,smb_tdscnt,ldata);    /* tdscnt */
 120                         SSVAL(cli->outbuf,smb_spscnt,this_lparam);      /* pscnt */
 121                         SSVAL(cli->outbuf,smb_spsoff,smb_offset(outparam,cli->outbuf)); /* psoff */
 122                         SSVAL(cli->outbuf,smb_spsdisp,tot_param);       /* psdisp */
 123                         SSVAL(cli->outbuf,smb_sdscnt,this_ldata);       /* dscnt */
 124                         SSVAL(cli->outbuf,smb_sdsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
 125                         SSVAL(cli->outbuf,smb_sdsdisp,tot_data);        /* dsdisp */
 126                         if (trans==SMBtrans2)
 127                                 SSVALS(cli->outbuf,smb_sfid,fid);               /* fid */
 128                         if (this_lparam)                        /* param[] */
 129                                 memcpy(outparam,param+tot_param,this_lparam);
 130                         if (this_ldata)                 /* data[] */
 131                                 memcpy(outdata,data+tot_data,this_ldata);
 132                         cli_setup_bcc(cli, outdata+this_ldata);
 133
 134                         /*
 135                          * Save the mid we're using. We need this for finding
 136                          * signing replies.
 137                          */
 138                         mid = cli->mid;
 139
 140                         show_msg(cli->outbuf);
 141                         if (!cli_send_smb(cli)) {
 142                                 return False;
 143                         }
 144
 145                         /* Ensure we use the same mid for the secondaries. */
 146                         cli->mid = mid;
 147
 148                         tot_data += this_ldata;
 149                         tot_param += this_lparam;
 150                 }
 151         }
 152
 153         /* Note we're in a trans state. Save the sequence
 154          * numbers for replies. */
 155
 156         cli_signing_trans_start(cli, mid);
 157         return(True);
 158 }
 159
 160 /****************************************************************************
 161  Receive a SMB trans or trans2 response allocating the necessary memory.
 162 ****************************************************************************/
 163
 164 BOOL cli_receive_trans(struct cli_state *cli,int trans,
 165                               char **param, unsigned int *param_len,
 166                               char **data, unsigned int *data_len)
 167 {
 168         unsigned int total_data=0;
 169         unsigned int total_param=0;
 170         unsigned int this_data,this_param;
 171         NTSTATUS status;
 172         char *tdata;
 173         char *tparam;
 174
 175         *data_len = *param_len = 0;
 176
 177         if (!cli_receive_smb(cli)) {
 178                 cli_signing_trans_stop(cli);
 179                 return False;
 180         }
 181
 182         show_msg(cli->inbuf);
 183
 184         /* sanity check */
 185         if (CVAL(cli->inbuf,smb_com) != trans) {
 186                 DEBUG(0,("Expected %s response, got command 0x%02x\n",
 187                          trans==SMBtrans?"SMBtrans":"SMBtrans2",
 188                          CVAL(cli->inbuf,smb_com)));
 189                 cli_signing_trans_stop(cli);
 190                 return(False);
 191         }
 192
 193         /*
 194          * An NT RPC pipe call can return ERRDOS, ERRmoredata
 195          * to a trans call. This is not an error and should not
 196          * be treated as such. Note that STATUS_NO_MORE_FILES is
 197          * returned when a trans2 findfirst/next finishes.
 198          */
 199         status = cli_nt_error(cli);
 200
 201         if (NT_STATUS_IS_ERR(status) || NT_STATUS_EQUAL(status,STATUS_NO_MORE_FILES)) {
 202                 cli_signing_trans_stop(cli);
 203                 return False;
 204         }
 205
 206         /* parse out the lengths */
 207         total_data = SVAL(cli->inbuf,smb_tdrcnt);
 208         total_param = SVAL(cli->inbuf,smb_tprcnt);
 209
 210         /* allocate it */
 211         if (total_data!=0) {
 212                 tdata = SMB_REALLOC(*data,total_data);
 213                 if (!tdata) {
 214                         DEBUG(0,("cli_receive_trans: failed to enlarge data buffer\n"));
 215                         cli_signing_trans_stop(cli);
 216                         return False;
 217                 }
 218                 else
 219                         *data = tdata;
 220         }
 221
 222         if (total_param!=0) {
 223                 tparam = SMB_REALLOC(*param,total_param);
 224                 if (!tparam) {
 225                         DEBUG(0,("cli_receive_trans: failed to enlarge param buffer\n"));
 226                         cli_signing_trans_stop(cli);
 227                         return False;
 228                 }
 229                 else
 230                         *param = tparam;
 231         }
 232
 233         for (;;)  {
 234                 this_data = SVAL(cli->inbuf,smb_drcnt);
 235                 this_param = SVAL(cli->inbuf,smb_prcnt);
 236
 237                 if (this_data + *data_len > total_data ||
 238                     this_param + *param_len > total_param) {
 239                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 240                         cli_signing_trans_stop(cli);
 241                         return False;
 242                 }
 243
 244                 if (this_data + *data_len < this_data ||
 245                                 this_data + *data_len < *data_len ||
 246                                 this_param + *param_len < this_param ||
 247                                 this_param + *param_len < *param_len) {
 248                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 249                         cli_signing_trans_stop(cli);
 250                         return False;
 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                                 cli_signing_trans_stop(cli);
 263                                 return False;
 264                         }
 265                         if (data_offset_in > cli->bufsize ||
 266                                         data_offset_in + this_data >  cli->bufsize ||
 267                                         data_offset_in + this_data < data_offset_in ||
 268                                         data_offset_in + this_data < this_data) {
 269                                 DEBUG(1,("Data overflow in cli_receive_trans\n"));
 270                                 cli_signing_trans_stop(cli);
 271                                 return False;
 272                         }
 273
 274                         memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
 275                 }
 276                 if (this_param) {
 277                         unsigned int param_offset_out = SVAL(cli->inbuf,smb_prdisp);
 278                         unsigned int param_offset_in = SVAL(cli->inbuf,smb_proff);
 279
 280                         if (param_offset_out > total_param ||
 281                                         param_offset_out + this_param > total_param ||
 282                                         param_offset_out + this_param < param_offset_out ||
 283                                         param_offset_out + this_param < this_param) {
 284                                 DEBUG(1,("Param overflow in cli_receive_trans\n"));
 285                                 cli_signing_trans_stop(cli);
 286                                 return False;
 287                         }
 288                         if (param_offset_in > cli->bufsize ||
 289                                         param_offset_in + this_param >  cli->bufsize ||
 290                                         param_offset_in + this_param < param_offset_in ||
 291                                         param_offset_in + this_param < this_param) {
 292                                 DEBUG(1,("Param overflow in cli_receive_trans\n"));
 293                                 cli_signing_trans_stop(cli);
 294                                 return False;
 295                         }
 296
 297                         memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
 298                 }
 299                 *data_len += this_data;
 300                 *param_len += this_param;
 301
 302                 if (total_data <= *data_len && total_param <= *param_len)
 303                         break;
 304
 305                 if (!cli_receive_smb(cli)) {
 306                         cli_signing_trans_stop(cli);
 307                         return False;
 308                 }
 309
 310                 show_msg(cli->inbuf);
 311
 312                 /* sanity check */
 313                 if (CVAL(cli->inbuf,smb_com) != trans) {
 314                         DEBUG(0,("Expected %s response, got command 0x%02x\n",
 315                                  trans==SMBtrans?"SMBtrans":"SMBtrans2",
 316                                  CVAL(cli->inbuf,smb_com)));
 317                         cli_signing_trans_stop(cli);
 318                         return(False);
 319                 }
 320                 if (NT_STATUS_IS_ERR(cli_nt_error(cli))) {
 321                         cli_signing_trans_stop(cli);
 322                         return(False);
 323                 }
 324
 325                 /* parse out the total lengths again - they can shrink! */
 326                 if (SVAL(cli->inbuf,smb_tdrcnt) < total_data)
 327                         total_data = SVAL(cli->inbuf,smb_tdrcnt);
 328                 if (SVAL(cli->inbuf,smb_tprcnt) < total_param)
 329                         total_param = SVAL(cli->inbuf,smb_tprcnt);
 330
 331                 if (total_data <= *data_len && total_param <= *param_len)
 332                         break;
 333
 334         }
 335
 336         cli_signing_trans_stop(cli);
 337         return(True);
 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         if (this_ldata < ldata || this_lparam < lparam) {
 405                 /* receive interim response */
 406                 if (!cli_receive_smb(cli) || cli_is_error(cli)) {
 407                         return(False);
 408                 }
 409
 410                 tot_data = this_ldata;
 411                 tot_param = this_lparam;
 412
 413                 while (tot_data < ldata || tot_param < lparam)  {
 414                         this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
 415                         this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
 416
 417                         set_message(cli->outbuf,18,0,True);
 418                         SCVAL(cli->outbuf,smb_com,SMBnttranss);
 419
 420                         /* XXX - these should probably be aligned */
 421                         outparam = smb_buf(cli->outbuf);
 422                         outdata = outparam+this_lparam;
 423
 424                         /* secondary request */
 425                         SIVAL(cli->outbuf,smb_nts_TotalParameterCount,lparam);
 426                         SIVAL(cli->outbuf,smb_nts_TotalDataCount,ldata);
 427                         SIVAL(cli->outbuf,smb_nts_ParameterCount,this_lparam);
 428                         SIVAL(cli->outbuf,smb_nts_ParameterOffset,smb_offset(outparam,cli->outbuf));
 429                         SIVAL(cli->outbuf,smb_nts_ParameterDisplacement,tot_param);
 430                         SIVAL(cli->outbuf,smb_nts_DataCount,this_ldata);
 431                         SIVAL(cli->outbuf,smb_nts_DataOffset,smb_offset(outdata,cli->outbuf));
 432                         SIVAL(cli->outbuf,smb_nts_DataDisplacement,tot_data);
 433                         if (this_lparam)                        /* param[] */
 434                                 memcpy(outparam,param+tot_param,this_lparam);
 435                         if (this_ldata)                 /* data[] */
 436                                 memcpy(outdata,data+tot_data,this_ldata);
 437                         cli_setup_bcc(cli, outdata+this_ldata);
 438
 439                         /*
 440                          * Save the mid we're using. We need this for finding
 441                          * signing replies.
 442                          */
 443                         mid = cli->mid;
 444
 445                         show_msg(cli->outbuf);
 446
 447                         if (!cli_send_smb(cli)) {
 448                                 return False;
 449                         }
 450
 451                         /* Ensure we use the same mid for the secondaries. */
 452                         cli->mid = mid;
 453
 454                         tot_data += this_ldata;
 455                         tot_param += this_lparam;
 456                 }
 457         }
 458
 459         /* Note we're in a trans state. Save the sequence
 460          * numbers for replies. */
 461
 462         cli_signing_trans_start(cli, mid);
 463         return(True);
 464 }
 465
 466 /****************************************************************************
 467  Receive a SMB nttrans response allocating the necessary memory.
 468 ****************************************************************************/
 469
 470 BOOL cli_receive_nt_trans(struct cli_state *cli,
 471                           char **param, unsigned int *param_len,
 472                           char **data, unsigned int *data_len)
 473 {
 474         unsigned int total_data=0;
 475         unsigned int total_param=0;
 476         unsigned int this_data,this_param;
 477         uint8 eclass;
 478         uint32 ecode;
 479         char *tdata;
 480         char *tparam;
 481
 482         *data_len = *param_len = 0;
 483
 484         if (!cli_receive_smb(cli)) {
 485                 cli_signing_trans_stop(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                 cli_signing_trans_stop(cli);
 496                 return(False);
 497         }
 498
 499         /*
 500          * An NT RPC pipe call can return ERRDOS, ERRmoredata
 501          * to a trans call. This is not an error and should not
 502          * be treated as such.
 503          */
 504         if (cli_is_dos_error(cli)) {
 505                 cli_dos_error(cli, &eclass, &ecode);
 506                 if (!(eclass == ERRDOS && ecode == ERRmoredata)) {
 507                         cli_signing_trans_stop(cli);
 508                         return(False);
 509                 }
 510         }
 511
 512         /*
 513          * Likewise for NT_STATUS_BUFFER_TOO_SMALL
 514          */
 515         if (cli_is_nt_error(cli)) {
 516                 if (!NT_STATUS_EQUAL(cli_nt_error(cli),
 517                                      NT_STATUS_BUFFER_TOO_SMALL)) {
 518                         cli_signing_trans_stop(cli);
 519                         return(False);
 520                 }
 521         }
 522
 523         /* parse out the lengths */
 524         total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 525         total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 526
 527         /* allocate it */
 528         if (total_data) {
 529                 tdata = SMB_REALLOC(*data,total_data);
 530                 if (!tdata) {
 531                         DEBUG(0,("cli_receive_nt_trans: failed to enlarge data buffer to %d\n",total_data));
 532                         cli_signing_trans_stop(cli);
 533                         return False;
 534                 } else {
 535                         *data = tdata;
 536                 }
 537         }
 538
 539         if (total_param) {
 540                 tparam = SMB_REALLOC(*param,total_param);
 541                 if (!tparam) {
 542                         DEBUG(0,("cli_receive_nt_trans: failed to enlarge param buffer to %d\n", total_param));
 543                         cli_signing_trans_stop(cli);
 544                         return False;
 545                 } else {
 546                         *param = tparam;
 547                 }
 548         }
 549
 550         while (1)  {
 551                 this_data = SVAL(cli->inbuf,smb_ntr_DataCount);
 552                 this_param = SVAL(cli->inbuf,smb_ntr_ParameterCount);
 553
 554                 if (this_data + *data_len > total_data ||
 555                     this_param + *param_len > total_param) {
 556                         DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 557                         cli_signing_trans_stop(cli);
 558                         return False;
 559                 }
 560
 561                 if (this_data + *data_len < this_data ||
 562                                 this_data + *data_len < *data_len ||
 563                                 this_param + *param_len < this_param ||
 564                                 this_param + *param_len < *param_len) {
 565                         DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 566                         cli_signing_trans_stop(cli);
 567                         return False;
 568                 }
 569
 570                 if (this_data) {
 571                         unsigned int data_offset_out = SVAL(cli->inbuf,smb_ntr_DataDisplacement);
 572                         unsigned int data_offset_in = SVAL(cli->inbuf,smb_ntr_DataOffset);
 573
 574                         if (data_offset_out > total_data ||
 575                                         data_offset_out + this_data > total_data ||
 576                                         data_offset_out + this_data < data_offset_out ||
 577                                         data_offset_out + this_data < this_data) {
 578                                 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 579                                 cli_signing_trans_stop(cli);
 580                                 return False;
 581                         }
 582                         if (data_offset_in > cli->bufsize ||
 583                                         data_offset_in + this_data >  cli->bufsize ||
 584                                         data_offset_in + this_data < data_offset_in ||
 585                                         data_offset_in + this_data < this_data) {
 586                                 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 587                                 cli_signing_trans_stop(cli);
 588                                 return False;
 589                         }
 590
 591                         memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
 592                 }
 593
 594                 if (this_param) {
 595                         unsigned int param_offset_out = SVAL(cli->inbuf,smb_ntr_ParameterDisplacement);
 596                         unsigned int param_offset_in = SVAL(cli->inbuf,smb_ntr_ParameterOffset);
 597
 598                         if (param_offset_out > total_param ||
 599                                         param_offset_out + this_param > total_param ||
 600                                         param_offset_out + this_param < param_offset_out ||
 601                                         param_offset_out + this_param < this_param) {
 602                                 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
 603                                 cli_signing_trans_stop(cli);
 604                                 return False;
 605                         }
 606                         if (param_offset_in > cli->bufsize ||
 607                                         param_offset_in + this_param >  cli->bufsize ||
 608                                         param_offset_in + this_param < param_offset_in ||
 609                                         param_offset_in + this_param < this_param) {
 610                                 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
 611                                 cli_signing_trans_stop(cli);
 612                                 return False;
 613                         }
 614
 615                         memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
 616                 }
 617
 618                 *data_len += this_data;
 619                 *param_len += this_param;
 620
 621                 if (total_data <= *data_len && total_param <= *param_len)
 622                         break;
 623
 624                 if (!cli_receive_smb(cli)) {
 625                         cli_signing_trans_stop(cli);
 626                         return False;
 627                 }
 628
 629                 show_msg(cli->inbuf);
 630
 631                 /* sanity check */
 632                 if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 633                         DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 634                                  CVAL(cli->inbuf,smb_com)));
 635                         cli_signing_trans_stop(cli);
 636                         return(False);
 637                 }
 638                 if (cli_is_dos_error(cli)) {
 639                         cli_dos_error(cli, &eclass, &ecode);
 640                         if(!(eclass == ERRDOS && ecode == ERRmoredata)) {
 641                                 cli_signing_trans_stop(cli);
 642                                 return(False);
 643                         }
 644                 }
 645                 /*
 646                  * Likewise for NT_STATUS_BUFFER_TOO_SMALL
 647                  */
 648                 if (cli_is_nt_error(cli)) {
 649                         if (!NT_STATUS_EQUAL(cli_nt_error(cli),
 650                                              NT_STATUS_BUFFER_TOO_SMALL)) {
 651                                 cli_signing_trans_stop(cli);
 652                                 return(False);
 653                         }
 654                 }
 655
 656                 /* parse out the total lengths again - they can shrink! */
 657                 if (SVAL(cli->inbuf,smb_ntr_TotalDataCount) < total_data)
 658                         total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 659                 if (SVAL(cli->inbuf,smb_ntr_TotalParameterCount) < total_param)
 660                         total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 661
 662                 if (total_data <= *data_len && total_param <= *param_len)
 663                         break;
 664         }
 665
 666         cli_signing_trans_stop(cli);
 667         return(True);
 668 }