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 #define NO_SYSLOG
  22
  23 #include "includes.h"
  24
  25
  26 /****************************************************************************
  27  Send a SMB trans or trans2 request.
  28 ****************************************************************************/
  29
  30 BOOL cli_send_trans(struct cli_state *cli, int trans,
  31                     const char *pipe_name,
  32                     int fid, int flags,
  33                     uint16 *setup, unsigned int lsetup, unsigned int msetup,
  34                     const char *param, unsigned int lparam, unsigned int mparam,
  35                     const char *data, unsigned int ldata, unsigned int mdata)
  36 {
  37         unsigned int i;
  38         unsigned int this_ldata,this_lparam;
  39         unsigned int tot_data=0,tot_param=0;
  40         char *outdata,*outparam;
  41         char *p;
  42         int pipe_name_len=0;
  43         uint16 mid;
  44
  45         this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
  46         this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
  47
  48         memset(cli->outbuf,'\0',smb_size);
  49         set_message(cli->outbuf,14+lsetup,0,True);
  50         SCVAL(cli->outbuf,smb_com,trans);
  51         SSVAL(cli->outbuf,smb_tid, cli->cnum);
  52         cli_setup_packet(cli);
  53         mid = cli->mid;
  54
  55         if (pipe_name) {
  56                 pipe_name_len = clistr_push(cli, smb_buf(cli->outbuf), pipe_name, -1, STR_TERMINATE);
  57         }
  58
  59         outparam = smb_buf(cli->outbuf)+(trans==SMBtrans ? pipe_name_len : 3);
  60         outdata = outparam+this_lparam;
  61
  62         /* primary request */
  63         SSVAL(cli->outbuf,smb_tpscnt,lparam);   /* tpscnt */
  64         SSVAL(cli->outbuf,smb_tdscnt,ldata);    /* tdscnt */
  65         SSVAL(cli->outbuf,smb_mprcnt,mparam);   /* mprcnt */
  66         SSVAL(cli->outbuf,smb_mdrcnt,mdata);    /* mdrcnt */
  67         SCVAL(cli->outbuf,smb_msrcnt,msetup);   /* msrcnt */
  68         SSVAL(cli->outbuf,smb_flags,flags);     /* flags */
  69         SIVAL(cli->outbuf,smb_timeout,0);               /* timeout */
  70         SSVAL(cli->outbuf,smb_pscnt,this_lparam);       /* pscnt */
  71         SSVAL(cli->outbuf,smb_psoff,smb_offset(outparam,cli->outbuf)); /* psoff */
  72         SSVAL(cli->outbuf,smb_dscnt,this_ldata);        /* dscnt */
  73         SSVAL(cli->outbuf,smb_dsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
  74         SCVAL(cli->outbuf,smb_suwcnt,lsetup);   /* suwcnt */
  75         for (i=0;i<lsetup;i++)          /* setup[] */
  76                 SSVAL(cli->outbuf,smb_setup+i*2,setup[i]);
  77         p = smb_buf(cli->outbuf);
  78         if (trans != SMBtrans) {
  79                 *p++ = 0;  /* put in a null smb_name */
  80                 *p++ = 'D'; *p++ = ' '; /* observed in OS/2 */
  81         }
  82         if (this_lparam)                        /* param[] */
  83                 memcpy(outparam,param,this_lparam);
  84         if (this_ldata)                 /* data[] */
  85                 memcpy(outdata,data,this_ldata);
  86         cli_setup_bcc(cli, outdata+this_ldata);
  87
  88         show_msg(cli->outbuf);
  89
  90         cli_signing_trans_start(cli);
  91         if (!cli_send_smb(cli))
  92                 return False;
  93
  94         if (this_ldata < ldata || this_lparam < lparam) {
  95                 /* receive interim response */
  96                 if (!cli_receive_smb(cli) || cli_is_error(cli))
  97                         return(False);
  98
  99                 tot_data = this_ldata;
 100                 tot_param = this_lparam;
 101
 102                 while (tot_data < ldata || tot_param < lparam)  {
 103                         this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
 104                         this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
 105
 106                         set_message(cli->outbuf,trans==SMBtrans?8:9,0,True);
 107                         SCVAL(cli->outbuf,smb_com,(trans==SMBtrans ? SMBtranss : SMBtranss2));
 108
 109                         outparam = smb_buf(cli->outbuf);
 110                         outdata = outparam+this_lparam;
 111
 112                         /* secondary request */
 113                         SSVAL(cli->outbuf,smb_tpscnt,lparam);   /* tpscnt */
 114                         SSVAL(cli->outbuf,smb_tdscnt,ldata);    /* tdscnt */
 115                         SSVAL(cli->outbuf,smb_spscnt,this_lparam);      /* pscnt */
 116                         SSVAL(cli->outbuf,smb_spsoff,smb_offset(outparam,cli->outbuf)); /* psoff */
 117                         SSVAL(cli->outbuf,smb_spsdisp,tot_param);       /* psdisp */
 118                         SSVAL(cli->outbuf,smb_sdscnt,this_ldata);       /* dscnt */
 119                         SSVAL(cli->outbuf,smb_sdsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
 120                         SSVAL(cli->outbuf,smb_sdsdisp,tot_data);        /* dsdisp */
 121                         if (trans==SMBtrans2)
 122                                 SSVALS(cli->outbuf,smb_sfid,fid);               /* fid */
 123                         if (this_lparam)                        /* param[] */
 124                                 memcpy(outparam,param+tot_param,this_lparam);
 125                         if (this_ldata)                 /* data[] */
 126                                 memcpy(outdata,data+tot_data,this_ldata);
 127                         cli_setup_bcc(cli, outdata+this_ldata);
 128
 129                         /* Ensure this packet has the same MID as
 130                          * the primary. Important in signing. JRA. */
 131                         cli->mid = mid;
 132
 133                         show_msg(cli->outbuf);
 134                         if (!cli_send_smb(cli))
 135                                 return False;
 136
 137                         tot_data += this_ldata;
 138                         tot_param += this_lparam;
 139                 }
 140         }
 141
 142         return(True);
 143 }
 144
 145 /****************************************************************************
 146  Receive a SMB trans or trans2 response allocating the necessary memory.
 147 ****************************************************************************/
 148
 149 BOOL cli_receive_trans(struct cli_state *cli,int trans,
 150                               char **param, unsigned int *param_len,
 151                               char **data, unsigned int *data_len)
 152 {
 153         unsigned int total_data=0;
 154         unsigned int total_param=0;
 155         unsigned int this_data,this_param;
 156         NTSTATUS status;
 157         char *tdata;
 158         char *tparam;
 159
 160         *data_len = *param_len = 0;
 161
 162         if (!cli_receive_smb(cli))
 163                 return False;
 164
 165         show_msg(cli->inbuf);
 166
 167         /* sanity check */
 168         if (CVAL(cli->inbuf,smb_com) != trans) {
 169                 DEBUG(0,("Expected %s response, got command 0x%02x\n",
 170                          trans==SMBtrans?"SMBtrans":"SMBtrans2",
 171                          CVAL(cli->inbuf,smb_com)));
 172                 return(False);
 173         }
 174
 175         /*
 176          * An NT RPC pipe call can return ERRDOS, ERRmoredata
 177          * to a trans call. This is not an error and should not
 178          * be treated as such.
 179          */
 180         status = cli_nt_error(cli);
 181
 182         if (NT_STATUS_IS_ERR(status))
 183                 return False;
 184
 185         /* parse out the lengths */
 186         total_data = SVAL(cli->inbuf,smb_tdrcnt);
 187         total_param = SVAL(cli->inbuf,smb_tprcnt);
 188
 189         /* allocate it */
 190         if (total_data!=0) {
 191                 tdata = Realloc(*data,total_data);
 192                 if (!tdata) {
 193                         DEBUG(0,("cli_receive_trans: failed to enlarge data buffer\n"));
 194                         return False;
 195                 }
 196                 else
 197                         *data = tdata;
 198         }
 199
 200         if (total_param!=0) {
 201                 tparam = Realloc(*param,total_param);
 202                 if (!tparam) {
 203                         DEBUG(0,("cli_receive_trans: failed to enlarge param buffer\n"));
 204                         return False;
 205                 }
 206                 else
 207                         *param = tparam;
 208         }
 209
 210         for (;;)  {
 211                 this_data = SVAL(cli->inbuf,smb_drcnt);
 212                 this_param = SVAL(cli->inbuf,smb_prcnt);
 213
 214                 if (this_data + *data_len > total_data ||
 215                     this_param + *param_len > total_param) {
 216                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 217                         return False;
 218                 }
 219
 220                 if (this_data + *data_len < this_data ||
 221                                 this_data + *data_len < *data_len ||
 222                                 this_param + *param_len < this_param ||
 223                                 this_param + *param_len < *param_len) {
 224                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 225                         return False;
 226                 }
 227
 228                 if (this_data) {
 229                         unsigned int data_offset_out = SVAL(cli->inbuf,smb_drdisp);
 230                         unsigned int data_offset_in = SVAL(cli->inbuf,smb_droff);
 231
 232                         if (data_offset_out > total_data ||
 233                                         data_offset_out + this_data > total_data ||
 234                                         data_offset_out + this_data < data_offset_out ||
 235                                         data_offset_out + this_data < this_data) {
 236                                 DEBUG(1,("Data overflow in cli_receive_trans\n"));
 237                                 return False;
 238                         }
 239                         if (data_offset_in > cli->bufsize ||
 240                                         data_offset_in + this_data >  cli->bufsize ||
 241                                         data_offset_in + this_data < data_offset_in ||
 242                                         data_offset_in + this_data < this_data) {
 243                                 DEBUG(1,("Data overflow in cli_receive_trans\n"));
 244                                 return False;
 245                         }
 246
 247                         memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
 248                 }
 249                 if (this_param) {
 250                         unsigned int param_offset_out = SVAL(cli->inbuf,smb_prdisp);
 251                         unsigned int param_offset_in = SVAL(cli->inbuf,smb_proff);
 252
 253                         if (param_offset_out > total_param ||
 254                                         param_offset_out + this_param > total_param ||
 255                                         param_offset_out + this_param < param_offset_out ||
 256                                         param_offset_out + this_param < this_param) {
 257                                 DEBUG(1,("Param overflow in cli_receive_trans\n"));
 258                                 return False;
 259                         }
 260                         if (param_offset_in > cli->bufsize ||
 261                                         param_offset_in + this_param >  cli->bufsize ||
 262                                         param_offset_in + this_param < param_offset_in ||
 263                                         param_offset_in + this_param < this_param) {
 264                                 DEBUG(1,("Param overflow in cli_receive_trans\n"));
 265                                 return False;
 266                         }
 267
 268                         memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
 269                 }
 270                 *data_len += this_data;
 271                 *param_len += this_param;
 272
 273                 if (total_data <= *data_len && total_param <= *param_len)
 274                         break;
 275
 276                 if (!cli_receive_smb(cli))
 277                         return False;
 278
 279                 show_msg(cli->inbuf);
 280
 281                 /* sanity check */
 282                 if (CVAL(cli->inbuf,smb_com) != trans) {
 283                         DEBUG(0,("Expected %s response, got command 0x%02x\n",
 284                                  trans==SMBtrans?"SMBtrans":"SMBtrans2",
 285                                  CVAL(cli->inbuf,smb_com)));
 286                         return(False);
 287                 }
 288                 if (NT_STATUS_IS_ERR(cli_nt_error(cli))) {
 289                         return(False);
 290                 }
 291
 292                 /* parse out the total lengths again - they can shrink! */
 293                 if (SVAL(cli->inbuf,smb_tdrcnt) < total_data)
 294                         total_data = SVAL(cli->inbuf,smb_tdrcnt);
 295                 if (SVAL(cli->inbuf,smb_tprcnt) < total_param)
 296                         total_param = SVAL(cli->inbuf,smb_tprcnt);
 297
 298                 if (total_data <= *data_len && total_param <= *param_len)
 299                         break;
 300
 301         }
 302
 303         cli_signing_trans_stop(cli);
 304         return(True);
 305 }
 306
 307 /****************************************************************************
 308  Send a SMB nttrans request.
 309 ****************************************************************************/
 310
 311 BOOL cli_send_nt_trans(struct cli_state *cli,
 312                        int function,
 313                        int flags,
 314                        uint16 *setup, unsigned int lsetup, unsigned int msetup,
 315                        char *param, unsigned int lparam, unsigned int mparam,
 316                        char *data, unsigned int ldata, unsigned int mdata)
 317 {
 318         unsigned int i;
 319         unsigned int this_ldata,this_lparam;
 320         unsigned int tot_data=0,tot_param=0;
 321         uint16 mid;
 322         char *outdata,*outparam;
 323
 324         this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
 325         this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
 326
 327         memset(cli->outbuf,'\0',smb_size);
 328         set_message(cli->outbuf,19+lsetup,0,True);
 329         SCVAL(cli->outbuf,smb_com,SMBnttrans);
 330         SSVAL(cli->outbuf,smb_tid, cli->cnum);
 331         cli_setup_packet(cli);
 332         mid = cli->mid;
 333
 334         outparam = smb_buf(cli->outbuf)+3;
 335         outdata = outparam+this_lparam;
 336
 337         /* primary request */
 338         SCVAL(cli->outbuf,smb_nt_MaxSetupCount,msetup);
 339         SCVAL(cli->outbuf,smb_nt_Flags,flags);
 340         SIVAL(cli->outbuf,smb_nt_TotalParameterCount, lparam);
 341         SIVAL(cli->outbuf,smb_nt_TotalDataCount, ldata);
 342         SIVAL(cli->outbuf,smb_nt_MaxParameterCount, mparam);
 343         SIVAL(cli->outbuf,smb_nt_MaxDataCount, mdata);
 344         SIVAL(cli->outbuf,smb_nt_ParameterCount, this_lparam);
 345         SIVAL(cli->outbuf,smb_nt_ParameterOffset, smb_offset(outparam,cli->outbuf));
 346         SIVAL(cli->outbuf,smb_nt_DataCount, this_ldata);
 347         SIVAL(cli->outbuf,smb_nt_DataOffset, smb_offset(outdata,cli->outbuf));
 348         SIVAL(cli->outbuf,smb_nt_SetupCount, lsetup);
 349         SIVAL(cli->outbuf,smb_nt_Function, function);
 350         for (i=0;i<lsetup;i++)          /* setup[] */
 351                 SSVAL(cli->outbuf,smb_nt_SetupStart+i*2,setup[i]);
 352
 353         if (this_lparam)                        /* param[] */
 354                 memcpy(outparam,param,this_lparam);
 355         if (this_ldata)                 /* data[] */
 356                 memcpy(outdata,data,this_ldata);
 357
 358         cli_setup_bcc(cli, outdata+this_ldata);
 359
 360         show_msg(cli->outbuf);
 361         cli_signing_trans_start(cli);
 362         if (!cli_send_smb(cli))
 363                 return False;
 364
 365         if (this_ldata < ldata || this_lparam < lparam) {
 366                 /* receive interim response */
 367                 if (!cli_receive_smb(cli) || cli_is_error(cli))
 368                         return(False);
 369
 370                 tot_data = this_ldata;
 371                 tot_param = this_lparam;
 372
 373                 while (tot_data < ldata || tot_param < lparam)  {
 374                         this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
 375                         this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
 376
 377                         set_message(cli->outbuf,18,0,True);
 378                         SCVAL(cli->outbuf,smb_com,SMBnttranss);
 379
 380                         /* XXX - these should probably be aligned */
 381                         outparam = smb_buf(cli->outbuf);
 382                         outdata = outparam+this_lparam;
 383
 384                         /* secondary request */
 385                         SIVAL(cli->outbuf,smb_nts_TotalParameterCount,lparam);
 386                         SIVAL(cli->outbuf,smb_nts_TotalDataCount,ldata);
 387                         SIVAL(cli->outbuf,smb_nts_ParameterCount,this_lparam);
 388                         SIVAL(cli->outbuf,smb_nts_ParameterOffset,smb_offset(outparam,cli->outbuf));
 389                         SIVAL(cli->outbuf,smb_nts_ParameterDisplacement,tot_param);
 390                         SIVAL(cli->outbuf,smb_nts_DataCount,this_ldata);
 391                         SIVAL(cli->outbuf,smb_nts_DataOffset,smb_offset(outdata,cli->outbuf));
 392                         SIVAL(cli->outbuf,smb_nts_DataDisplacement,tot_data);
 393                         if (this_lparam)                        /* param[] */
 394                                 memcpy(outparam,param+tot_param,this_lparam);
 395                         if (this_ldata)                 /* data[] */
 396                                 memcpy(outdata,data+tot_data,this_ldata);
 397                         cli_setup_bcc(cli, outdata+this_ldata);
 398
 399                         /* Ensure this packet has the same MID as
 400                          * the primary. Important in signing. JRA. */
 401                         cli->mid = mid;
 402
 403                         show_msg(cli->outbuf);
 404
 405                         if (!cli_send_smb(cli))
 406                                 return False;
 407
 408                         tot_data += this_ldata;
 409                         tot_param += this_lparam;
 410                 }
 411         }
 412
 413         return(True);
 414 }
 415
 416
 417
 418 /****************************************************************************
 419   receive a SMB nttrans response allocating the necessary memory
 420   ****************************************************************************/
 421
 422 BOOL cli_receive_nt_trans(struct cli_state *cli,
 423                           char **param, unsigned int *param_len,
 424                           char **data, unsigned int *data_len)
 425 {
 426         unsigned int total_data=0;
 427         unsigned int total_param=0;
 428         unsigned int this_data,this_param;
 429         uint8 eclass;
 430         uint32 ecode;
 431         char *tdata;
 432         char *tparam;
 433
 434         *data_len = *param_len = 0;
 435
 436         if (!cli_receive_smb(cli))
 437                 return False;
 438
 439         show_msg(cli->inbuf);
 440
 441         /* sanity check */
 442         if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 443                 DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 444                          CVAL(cli->inbuf,smb_com)));
 445                 return(False);
 446         }
 447
 448         /*
 449          * An NT RPC pipe call can return ERRDOS, ERRmoredata
 450          * to a trans call. This is not an error and should not
 451          * be treated as such.
 452          */
 453         if (cli_is_dos_error(cli)) {
 454                 cli_dos_error(cli, &eclass, &ecode);
 455                 if (cli->nt_pipe_fnum == 0 || !(eclass == ERRDOS && ecode == ERRmoredata))
 456                         return(False);
 457         }
 458
 459         /* parse out the lengths */
 460         total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 461         total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 462
 463         /* allocate it */
 464         if (total_data) {
 465                 tdata = Realloc(*data,total_data);
 466                 if (!tdata) {
 467                         DEBUG(0,("cli_receive_nt_trans: failed to enlarge data buffer to %d\n",total_data));
 468                         return False;
 469                 } else {
 470                         *data = tdata;
 471                 }
 472         }
 473
 474         if (total_param) {
 475                 tparam = Realloc(*param,total_param);
 476                 if (!tparam) {
 477                         DEBUG(0,("cli_receive_nt_trans: failed to enlarge param buffer to %d\n", total_param));
 478                         return False;
 479                 } else {
 480                         *param = tparam;
 481                 }
 482         }
 483
 484         while (1)  {
 485                 this_data = SVAL(cli->inbuf,smb_ntr_DataCount);
 486                 this_param = SVAL(cli->inbuf,smb_ntr_ParameterCount);
 487
 488                 if (this_data + *data_len > total_data ||
 489                     this_param + *param_len > total_param) {
 490                         DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 491                         return False;
 492                 }
 493
 494                 if (this_data + *data_len < this_data ||
 495                                 this_data + *data_len < *data_len ||
 496                                 this_param + *param_len < this_param ||
 497                                 this_param + *param_len < *param_len) {
 498                         DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 499                         return False;
 500                 }
 501
 502                 if (this_data) {
 503                         unsigned int data_offset_out = SVAL(cli->inbuf,smb_ntr_DataDisplacement);
 504                         unsigned int data_offset_in = SVAL(cli->inbuf,smb_ntr_DataOffset);
 505
 506                         if (data_offset_out > total_data ||
 507                                         data_offset_out + this_data > total_data ||
 508                                         data_offset_out + this_data < data_offset_out ||
 509                                         data_offset_out + this_data < this_data) {
 510                                 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 511                                 return False;
 512                         }
 513                         if (data_offset_in > cli->bufsize ||
 514                                         data_offset_in + this_data >  cli->bufsize ||
 515                                         data_offset_in + this_data < data_offset_in ||
 516                                         data_offset_in + this_data < this_data) {
 517                                 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 518                                 return False;
 519                         }
 520
 521                         memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
 522                 }
 523
 524                 if (this_param) {
 525                         unsigned int param_offset_out = SVAL(cli->inbuf,smb_ntr_ParameterDisplacement);
 526                         unsigned int param_offset_in = SVAL(cli->inbuf,smb_ntr_ParameterOffset);
 527
 528                         if (param_offset_out > total_param ||
 529                                         param_offset_out + this_param > total_param ||
 530                                         param_offset_out + this_param < param_offset_out ||
 531                                         param_offset_out + this_param < this_param) {
 532                                 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
 533                                 return False;
 534                         }
 535                         if (param_offset_in > cli->bufsize ||
 536                                         param_offset_in + this_param >  cli->bufsize ||
 537                                         param_offset_in + this_param < param_offset_in ||
 538                                         param_offset_in + this_param < this_param) {
 539                                 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
 540                                 return False;
 541                         }
 542
 543                         memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
 544                 }
 545
 546                 *data_len += this_data;
 547                 *param_len += this_param;
 548
 549                 if (total_data <= *data_len && total_param <= *param_len)
 550                         break;
 551
 552                 if (!cli_receive_smb(cli))
 553                         return False;
 554
 555                 show_msg(cli->inbuf);
 556
 557                 /* sanity check */
 558                 if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 559                         DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 560                                  CVAL(cli->inbuf,smb_com)));
 561                         return(False);
 562                 }
 563                 if (cli_is_dos_error(cli)) {
 564                         cli_dos_error(cli, &eclass, &ecode);
 565                         if(cli->nt_pipe_fnum == 0 ||
 566                            !(eclass == ERRDOS && ecode == ERRmoredata))
 567                                 return(False);
 568                 }
 569                 /* parse out the total lengths again - they can shrink! */
 570                 if (SVAL(cli->inbuf,smb_ntr_TotalDataCount) < total_data)
 571                         total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 572                 if (SVAL(cli->inbuf,smb_ntr_TotalParameterCount) < total_param)
 573                         total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 574
 575                 if (total_data <= *data_len && total_param <= *param_len)
 576                         break;
 577         }
 578
 579         cli_signing_trans_stop(cli);
 580         return(True);
 581 }