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         return(True);
 157 }
 158
 159 /****************************************************************************
 160  Receive a SMB trans or trans2 response allocating the necessary memory.
 161 ****************************************************************************/
 162
 163 BOOL cli_receive_trans(struct cli_state *cli,int trans,
 164                               char **param, unsigned int *param_len,
 165                               char **data, unsigned int *data_len)
 166 {
 167         unsigned int total_data=0;
 168         unsigned int total_param=0;
 169         unsigned int this_data,this_param;
 170         NTSTATUS status;
 171
 172         *data_len = *param_len = 0;
 173
 174         if (!cli_receive_smb(cli)) {
 175                 return False;
 176         }
 177
 178         show_msg(cli->inbuf);
 179
 180         /* sanity check */
 181         if (CVAL(cli->inbuf,smb_com) != trans) {
 182                 DEBUG(0,("Expected %s response, got command 0x%02x\n",
 183                          trans==SMBtrans?"SMBtrans":"SMBtrans2",
 184                          CVAL(cli->inbuf,smb_com)));
 185                 return(False);
 186         }
 187
 188         /*
 189          * An NT RPC pipe call can return ERRDOS, ERRmoredata
 190          * to a trans call. This is not an error and should not
 191          * be treated as such. Note that STATUS_NO_MORE_FILES is
 192          * returned when a trans2 findfirst/next finishes.
 193          */
 194         status = cli_nt_error(cli);
 195
 196         if (NT_STATUS_IS_ERR(status) || NT_STATUS_EQUAL(status,STATUS_NO_MORE_FILES)) {
 197                 return False;
 198         }
 199
 200         /* parse out the lengths */
 201         total_data = SVAL(cli->inbuf,smb_tdrcnt);
 202         total_param = SVAL(cli->inbuf,smb_tprcnt);
 203
 204         /* allocate it */
 205         if (total_data!=0) {
 206                 *data = SMB_REALLOC(*data,total_data);
 207                 if (!(*data)) {
 208                         DEBUG(0,("cli_receive_trans: failed to enlarge data buffer\n"));
 209                         return False;
 210                 }
 211         }
 212
 213         if (total_param!=0) {
 214                 *param = SMB_REALLOC(*param,total_param);
 215                 if (!(*param)) {
 216                         DEBUG(0,("cli_receive_trans: failed to enlarge param buffer\n"));
 217                         return False;
 218                 }
 219         }
 220
 221         for (;;)  {
 222                 this_data = SVAL(cli->inbuf,smb_drcnt);
 223                 this_param = SVAL(cli->inbuf,smb_prcnt);
 224
 225                 if (this_data + *data_len > total_data ||
 226                     this_param + *param_len > total_param) {
 227                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 228                         return False;
 229                 }
 230
 231                 if (this_data + *data_len < this_data ||
 232                                 this_data + *data_len < *data_len ||
 233                                 this_param + *param_len < this_param ||
 234                                 this_param + *param_len < *param_len) {
 235                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 236                         return False;
 237                 }
 238
 239                 if (this_data) {
 240                         unsigned int data_offset_out = SVAL(cli->inbuf,smb_drdisp);
 241                         unsigned int data_offset_in = SVAL(cli->inbuf,smb_droff);
 242
 243                         if (data_offset_out > total_data ||
 244                                         data_offset_out + this_data > total_data ||
 245                                         data_offset_out + this_data < data_offset_out ||
 246                                         data_offset_out + this_data < this_data) {
 247                                 DEBUG(1,("Data overflow in cli_receive_trans\n"));
 248                                 return False;
 249                         }
 250                         if (data_offset_in > cli->bufsize ||
 251                                         data_offset_in + this_data >  cli->bufsize ||
 252                                         data_offset_in + this_data < data_offset_in ||
 253                                         data_offset_in + this_data < this_data) {
 254                                 DEBUG(1,("Data overflow in cli_receive_trans\n"));
 255                                 return False;
 256                         }
 257
 258                         memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
 259                 }
 260                 if (this_param) {
 261                         unsigned int param_offset_out = SVAL(cli->inbuf,smb_prdisp);
 262                         unsigned int param_offset_in = SVAL(cli->inbuf,smb_proff);
 263
 264                         if (param_offset_out > total_param ||
 265                                         param_offset_out + this_param > total_param ||
 266                                         param_offset_out + this_param < param_offset_out ||
 267                                         param_offset_out + this_param < this_param) {
 268                                 DEBUG(1,("Param overflow in cli_receive_trans\n"));
 269                                 return False;
 270                         }
 271                         if (param_offset_in > cli->bufsize ||
 272                                         param_offset_in + this_param >  cli->bufsize ||
 273                                         param_offset_in + this_param < param_offset_in ||
 274                                         param_offset_in + this_param < this_param) {
 275                                 DEBUG(1,("Param overflow in cli_receive_trans\n"));
 276                                 return False;
 277                         }
 278
 279                         memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
 280                 }
 281                 *data_len += this_data;
 282                 *param_len += this_param;
 283
 284                 if (total_data <= *data_len && total_param <= *param_len)
 285                         break;
 286
 287                 if (!cli_receive_smb(cli)) {
 288                         return False;
 289                 }
 290
 291                 show_msg(cli->inbuf);
 292
 293                 /* sanity check */
 294                 if (CVAL(cli->inbuf,smb_com) != trans) {
 295                         DEBUG(0,("Expected %s response, got command 0x%02x\n",
 296                                  trans==SMBtrans?"SMBtrans":"SMBtrans2",
 297                                  CVAL(cli->inbuf,smb_com)));
 298                         return(False);
 299                 }
 300                 if (NT_STATUS_IS_ERR(cli_nt_error(cli))) {
 301                         return(False);
 302                 }
 303
 304                 /* parse out the total lengths again - they can shrink! */
 305                 if (SVAL(cli->inbuf,smb_tdrcnt) < total_data)
 306                         total_data = SVAL(cli->inbuf,smb_tdrcnt);
 307                 if (SVAL(cli->inbuf,smb_tprcnt) < total_param)
 308                         total_param = SVAL(cli->inbuf,smb_tprcnt);
 309
 310                 if (total_data <= *data_len && total_param <= *param_len)
 311                         break;
 312
 313         }
 314
 315         return(True);
 316 }
 317
 318 /****************************************************************************
 319  Send a SMB nttrans request.
 320 ****************************************************************************/
 321
 322 BOOL cli_send_nt_trans(struct cli_state *cli,
 323                        int function,
 324                        int flags,
 325                        uint16 *setup, unsigned int lsetup, unsigned int msetup,
 326                        char *param, unsigned int lparam, unsigned int mparam,
 327                        char *data, unsigned int ldata, unsigned int mdata)
 328 {
 329         unsigned int i;
 330         unsigned int this_ldata,this_lparam;
 331         unsigned int tot_data=0,tot_param=0;
 332         uint16 mid;
 333         char *outdata,*outparam;
 334
 335         this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
 336         this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
 337
 338         memset(cli->outbuf,'\0',smb_size);
 339         set_message(cli->outbuf,19+lsetup,0,True);
 340         SCVAL(cli->outbuf,smb_com,SMBnttrans);
 341         SSVAL(cli->outbuf,smb_tid, cli->cnum);
 342         cli_setup_packet(cli);
 343
 344         /*
 345          * Save the mid we're using. We need this for finding
 346          * signing replies.
 347          */
 348
 349         mid = cli->mid;
 350
 351         outparam = smb_buf(cli->outbuf)+3;
 352         outdata = outparam+this_lparam;
 353
 354         /* primary request */
 355         SCVAL(cli->outbuf,smb_nt_MaxSetupCount,msetup);
 356         SCVAL(cli->outbuf,smb_nt_Flags,flags);
 357         SIVAL(cli->outbuf,smb_nt_TotalParameterCount, lparam);
 358         SIVAL(cli->outbuf,smb_nt_TotalDataCount, ldata);
 359         SIVAL(cli->outbuf,smb_nt_MaxParameterCount, mparam);
 360         SIVAL(cli->outbuf,smb_nt_MaxDataCount, mdata);
 361         SIVAL(cli->outbuf,smb_nt_ParameterCount, this_lparam);
 362         SIVAL(cli->outbuf,smb_nt_ParameterOffset, smb_offset(outparam,cli->outbuf));
 363         SIVAL(cli->outbuf,smb_nt_DataCount, this_ldata);
 364         SIVAL(cli->outbuf,smb_nt_DataOffset, smb_offset(outdata,cli->outbuf));
 365         SIVAL(cli->outbuf,smb_nt_SetupCount, lsetup);
 366         SIVAL(cli->outbuf,smb_nt_Function, function);
 367         for (i=0;i<lsetup;i++)          /* setup[] */
 368                 SSVAL(cli->outbuf,smb_nt_SetupStart+i*2,setup[i]);
 369
 370         if (this_lparam)                        /* param[] */
 371                 memcpy(outparam,param,this_lparam);
 372         if (this_ldata)                 /* data[] */
 373                 memcpy(outdata,data,this_ldata);
 374
 375         cli_setup_bcc(cli, outdata+this_ldata);
 376
 377         show_msg(cli->outbuf);
 378         if (!cli_send_smb(cli)) {
 379                 return False;
 380         }
 381
 382         if (this_ldata < ldata || this_lparam < lparam) {
 383                 /* receive interim response */
 384                 if (!cli_receive_smb(cli) || cli_is_error(cli)) {
 385                         return(False);
 386                 }
 387
 388                 tot_data = this_ldata;
 389                 tot_param = this_lparam;
 390
 391                 while (tot_data < ldata || tot_param < lparam)  {
 392                         this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
 393                         this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
 394
 395                         set_message(cli->outbuf,18,0,True);
 396                         SCVAL(cli->outbuf,smb_com,SMBnttranss);
 397
 398                         /* XXX - these should probably be aligned */
 399                         outparam = smb_buf(cli->outbuf);
 400                         outdata = outparam+this_lparam;
 401
 402                         /* secondary request */
 403                         SIVAL(cli->outbuf,smb_nts_TotalParameterCount,lparam);
 404                         SIVAL(cli->outbuf,smb_nts_TotalDataCount,ldata);
 405                         SIVAL(cli->outbuf,smb_nts_ParameterCount,this_lparam);
 406                         SIVAL(cli->outbuf,smb_nts_ParameterOffset,smb_offset(outparam,cli->outbuf));
 407                         SIVAL(cli->outbuf,smb_nts_ParameterDisplacement,tot_param);
 408                         SIVAL(cli->outbuf,smb_nts_DataCount,this_ldata);
 409                         SIVAL(cli->outbuf,smb_nts_DataOffset,smb_offset(outdata,cli->outbuf));
 410                         SIVAL(cli->outbuf,smb_nts_DataDisplacement,tot_data);
 411                         if (this_lparam)                        /* param[] */
 412                                 memcpy(outparam,param+tot_param,this_lparam);
 413                         if (this_ldata)                 /* data[] */
 414                                 memcpy(outdata,data+tot_data,this_ldata);
 415                         cli_setup_bcc(cli, outdata+this_ldata);
 416
 417                         /*
 418                          * Save the mid we're using. We need this for finding
 419                          * signing replies.
 420                          */
 421                         mid = cli->mid;
 422
 423                         show_msg(cli->outbuf);
 424
 425                         if (!cli_send_smb(cli)) {
 426                                 return False;
 427                         }
 428
 429                         /* Ensure we use the same mid for the secondaries. */
 430                         cli->mid = mid;
 431
 432                         tot_data += this_ldata;
 433                         tot_param += this_lparam;
 434                 }
 435         }
 436
 437         /* Note we're in a trans state. Save the sequence
 438          * numbers for replies. */
 439
 440         return(True);
 441 }
 442
 443 /****************************************************************************
 444  Receive a SMB nttrans response allocating the necessary memory.
 445 ****************************************************************************/
 446
 447 BOOL cli_receive_nt_trans(struct cli_state *cli,
 448                           char **param, unsigned int *param_len,
 449                           char **data, unsigned int *data_len)
 450 {
 451         unsigned int total_data=0;
 452         unsigned int total_param=0;
 453         unsigned int this_data,this_param;
 454         uint8 eclass;
 455         uint32 ecode;
 456
 457         *data_len = *param_len = 0;
 458
 459         if (!cli_receive_smb(cli)) {
 460                 return False;
 461         }
 462
 463         show_msg(cli->inbuf);
 464
 465         /* sanity check */
 466         if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 467                 DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 468                          CVAL(cli->inbuf,smb_com)));
 469                 return(False);
 470         }
 471
 472         /*
 473          * An NT RPC pipe call can return ERRDOS, ERRmoredata
 474          * to a trans call. This is not an error and should not
 475          * be treated as such.
 476          */
 477         if (cli_is_dos_error(cli)) {
 478                 cli_dos_error(cli, &eclass, &ecode);
 479                 if (!(eclass == ERRDOS && ecode == ERRmoredata)) {
 480                         return(False);
 481                 }
 482         }
 483
 484         /*
 485          * Likewise for NT_STATUS_BUFFER_TOO_SMALL
 486          */
 487         if (cli_is_nt_error(cli)) {
 488                 if (!NT_STATUS_EQUAL(cli_nt_error(cli),
 489                                      NT_STATUS_BUFFER_TOO_SMALL)) {
 490                         return(False);
 491                 }
 492         }
 493
 494         /* parse out the lengths */
 495         total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 496         total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 497
 498         /* allocate it */
 499         if (total_data) {
 500                 *data = SMB_REALLOC(*data,total_data);
 501                 if (!(*data)) {
 502                         DEBUG(0,("cli_receive_nt_trans: failed to enlarge data buffer to %d\n",total_data));
 503                         return False;
 504                 }
 505         }
 506
 507         if (total_param) {
 508                 *param = SMB_REALLOC(*param,total_param);
 509                 if (!(*param)) {
 510                         DEBUG(0,("cli_receive_nt_trans: failed to enlarge param buffer to %d\n", total_param));
 511                         return False;
 512                 }
 513         }
 514
 515         while (1)  {
 516                 this_data = SVAL(cli->inbuf,smb_ntr_DataCount);
 517                 this_param = SVAL(cli->inbuf,smb_ntr_ParameterCount);
 518
 519                 if (this_data + *data_len > total_data ||
 520                     this_param + *param_len > total_param) {
 521                         DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 522                         return False;
 523                 }
 524
 525                 if (this_data + *data_len < this_data ||
 526                                 this_data + *data_len < *data_len ||
 527                                 this_param + *param_len < this_param ||
 528                                 this_param + *param_len < *param_len) {
 529                         DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 530                         return False;
 531                 }
 532
 533                 if (this_data) {
 534                         unsigned int data_offset_out = SVAL(cli->inbuf,smb_ntr_DataDisplacement);
 535                         unsigned int data_offset_in = SVAL(cli->inbuf,smb_ntr_DataOffset);
 536
 537                         if (data_offset_out > total_data ||
 538                                         data_offset_out + this_data > total_data ||
 539                                         data_offset_out + this_data < data_offset_out ||
 540                                         data_offset_out + this_data < this_data) {
 541                                 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 542                                 return False;
 543                         }
 544                         if (data_offset_in > cli->bufsize ||
 545                                         data_offset_in + this_data >  cli->bufsize ||
 546                                         data_offset_in + this_data < data_offset_in ||
 547                                         data_offset_in + this_data < this_data) {
 548                                 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 549                                 return False;
 550                         }
 551
 552                         memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
 553                 }
 554
 555                 if (this_param) {
 556                         unsigned int param_offset_out = SVAL(cli->inbuf,smb_ntr_ParameterDisplacement);
 557                         unsigned int param_offset_in = SVAL(cli->inbuf,smb_ntr_ParameterOffset);
 558
 559                         if (param_offset_out > total_param ||
 560                                         param_offset_out + this_param > total_param ||
 561                                         param_offset_out + this_param < param_offset_out ||
 562                                         param_offset_out + this_param < this_param) {
 563                                 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
 564                                 return False;
 565                         }
 566                         if (param_offset_in > cli->bufsize ||
 567                                         param_offset_in + this_param >  cli->bufsize ||
 568                                         param_offset_in + this_param < param_offset_in ||
 569                                         param_offset_in + this_param < this_param) {
 570                                 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
 571                                 return False;
 572                         }
 573
 574                         memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
 575                 }
 576
 577                 *data_len += this_data;
 578                 *param_len += this_param;
 579
 580                 if (total_data <= *data_len && total_param <= *param_len)
 581                         break;
 582
 583                 if (!cli_receive_smb(cli)) {
 584                         return False;
 585                 }
 586
 587                 show_msg(cli->inbuf);
 588
 589                 /* sanity check */
 590                 if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 591                         DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 592                                  CVAL(cli->inbuf,smb_com)));
 593                         return(False);
 594                 }
 595                 if (cli_is_dos_error(cli)) {
 596                         cli_dos_error(cli, &eclass, &ecode);
 597                         if(!(eclass == ERRDOS && ecode == ERRmoredata)) {
 598                                 return(False);
 599                         }
 600                 }
 601                 /*
 602                  * Likewise for NT_STATUS_BUFFER_TOO_SMALL
 603                  */
 604                 if (cli_is_nt_error(cli)) {
 605                         if (!NT_STATUS_EQUAL(cli_nt_error(cli),
 606                                              NT_STATUS_BUFFER_TOO_SMALL)) {
 607                                 return(False);
 608                         }
 609                 }
 610
 611                 /* parse out the total lengths again - they can shrink! */
 612                 if (SVAL(cli->inbuf,smb_ntr_TotalDataCount) < total_data)
 613                         total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 614                 if (SVAL(cli->inbuf,smb_ntr_TotalParameterCount) < total_param)
 615                         total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 616
 617                 if (total_data <= *data_len && total_param <= *param_len)
 618                         break;
 619         }
 620
 621         return(True);
 622 }