source3/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         /* Note we're in a trans state. Save the sequence
  99          * numbers for replies. */
 100         client_set_trans_sign_state_on(cli, mid);
 101
 102         if (this_ldata < ldata || this_lparam < lparam) {
 103                 /* receive interim response */
 104                 if (!cli_receive_smb(cli) || cli_is_error(cli)) {
 105                         client_set_trans_sign_state_off(cli, mid);
 106                         return(False);
 107                 }
 108
 109                 tot_data = this_ldata;
 110                 tot_param = this_lparam;
 111
 112                 while (tot_data < ldata || tot_param < lparam)  {
 113                         this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
 114                         this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
 115
 116                         set_message(cli->outbuf,trans==SMBtrans?8:9,0,True);
 117                         SCVAL(cli->outbuf,smb_com,(trans==SMBtrans ? SMBtranss : SMBtranss2));
 118
 119                         outparam = smb_buf(cli->outbuf);
 120                         outdata = outparam+this_lparam;
 121
 122                         /* secondary request */
 123                         SSVAL(cli->outbuf,smb_tpscnt,lparam);   /* tpscnt */
 124                         SSVAL(cli->outbuf,smb_tdscnt,ldata);    /* tdscnt */
 125                         SSVAL(cli->outbuf,smb_spscnt,this_lparam);      /* pscnt */
 126                         SSVAL(cli->outbuf,smb_spsoff,smb_offset(outparam,cli->outbuf)); /* psoff */
 127                         SSVAL(cli->outbuf,smb_spsdisp,tot_param);       /* psdisp */
 128                         SSVAL(cli->outbuf,smb_sdscnt,this_ldata);       /* dscnt */
 129                         SSVAL(cli->outbuf,smb_sdsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
 130                         SSVAL(cli->outbuf,smb_sdsdisp,tot_data);        /* dsdisp */
 131                         if (trans==SMBtrans2)
 132                                 SSVALS(cli->outbuf,smb_sfid,fid);               /* fid */
 133                         if (this_lparam)                        /* param[] */
 134                                 memcpy(outparam,param+tot_param,this_lparam);
 135                         if (this_ldata)                 /* data[] */
 136                                 memcpy(outdata,data+tot_data,this_ldata);
 137                         cli_setup_bcc(cli, outdata+this_ldata);
 138
 139                         /*
 140                          * Save the mid we're using. We need this for finding
 141                          * signing replies.
 142                          */
 143                         mid = cli->mid;
 144
 145                         show_msg(cli->outbuf);
 146                         if (!cli_send_smb(cli)) {
 147                                 client_set_trans_sign_state_off(cli, mid);
 148                                 return False;
 149                         }
 150
 151                         /* Ensure we use the same mid for the secondaries. */
 152                         cli->mid = mid;
 153
 154                         tot_data += this_ldata;
 155                         tot_param += this_lparam;
 156                 }
 157         }
 158
 159         return(True);
 160 }
 161
 162 /****************************************************************************
 163  Receive a SMB trans or trans2 response allocating the necessary memory.
 164 ****************************************************************************/
 165
 166 BOOL cli_receive_trans(struct cli_state *cli,int trans,
 167                               char **param, unsigned int *param_len,
 168                               char **data, unsigned int *data_len)
 169 {
 170         unsigned int total_data=0;
 171         unsigned int total_param=0;
 172         unsigned int this_data,this_param;
 173         NTSTATUS status;
 174         BOOL ret = False;
 175
 176         *data_len = *param_len = 0;
 177
 178         if (!cli_receive_smb(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                 return False;
 190         }
 191
 192         /*
 193          * An NT RPC pipe call can return ERRDOS, ERRmoredata
 194          * to a trans call. This is not an error and should not
 195          * be treated as such. Note that STATUS_NO_MORE_FILES is
 196          * returned when a trans2 findfirst/next finishes.
 197          */
 198         status = cli_nt_error(cli);
 199
 200         if (NT_STATUS_IS_ERR(status) || NT_STATUS_EQUAL(status,STATUS_NO_MORE_FILES)) {
 201                 goto out;
 202         }
 203
 204         /* parse out the lengths */
 205         total_data = SVAL(cli->inbuf,smb_tdrcnt);
 206         total_param = SVAL(cli->inbuf,smb_tprcnt);
 207
 208         /* allocate it */
 209         if (total_data!=0) {
 210                 *data = SMB_REALLOC(*data,total_data);
 211                 if (!(*data)) {
 212                         DEBUG(0,("cli_receive_trans: failed to enlarge data buffer\n"));
 213                         goto out;
 214                 }
 215         }
 216
 217         if (total_param!=0) {
 218                 *param = SMB_REALLOC(*param,total_param);
 219                 if (!(*param)) {
 220                         DEBUG(0,("cli_receive_trans: failed to enlarge param buffer\n"));
 221                         goto out;
 222                 }
 223         }
 224
 225         for (;;)  {
 226                 this_data = SVAL(cli->inbuf,smb_drcnt);
 227                 this_param = SVAL(cli->inbuf,smb_prcnt);
 228
 229                 if (this_data + *data_len > total_data ||
 230                     this_param + *param_len > total_param) {
 231                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 232                         goto out;
 233                 }
 234
 235                 if (this_data + *data_len < this_data ||
 236                                 this_data + *data_len < *data_len ||
 237                                 this_param + *param_len < this_param ||
 238                                 this_param + *param_len < *param_len) {
 239                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 240                         goto out;
 241                 }
 242
 243                 if (this_data) {
 244                         unsigned int data_offset_out = SVAL(cli->inbuf,smb_drdisp);
 245                         unsigned int data_offset_in = SVAL(cli->inbuf,smb_droff);
 246
 247                         if (data_offset_out > total_data ||
 248                                         data_offset_out + this_data > total_data ||
 249                                         data_offset_out + this_data < data_offset_out ||
 250                                         data_offset_out + this_data < this_data) {
 251                                 DEBUG(1,("Data overflow in cli_receive_trans\n"));
 252                                 goto out;
 253                         }
 254                         if (data_offset_in > cli->bufsize ||
 255                                         data_offset_in + this_data >  cli->bufsize ||
 256                                         data_offset_in + this_data < data_offset_in ||
 257                                         data_offset_in + this_data < this_data) {
 258                                 DEBUG(1,("Data overflow in cli_receive_trans\n"));
 259                                 goto out;
 260                         }
 261
 262                         memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
 263                 }
 264                 if (this_param) {
 265                         unsigned int param_offset_out = SVAL(cli->inbuf,smb_prdisp);
 266                         unsigned int param_offset_in = SVAL(cli->inbuf,smb_proff);
 267
 268                         if (param_offset_out > total_param ||
 269                                         param_offset_out + this_param > total_param ||
 270                                         param_offset_out + this_param < param_offset_out ||
 271                                         param_offset_out + this_param < this_param) {
 272                                 DEBUG(1,("Param overflow in cli_receive_trans\n"));
 273                                 goto out;
 274                         }
 275                         if (param_offset_in > cli->bufsize ||
 276                                         param_offset_in + this_param >  cli->bufsize ||
 277                                         param_offset_in + this_param < param_offset_in ||
 278                                         param_offset_in + this_param < this_param) {
 279                                 DEBUG(1,("Param overflow in cli_receive_trans\n"));
 280                                 goto out;
 281                         }
 282
 283                         memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
 284                 }
 285                 *data_len += this_data;
 286                 *param_len += this_param;
 287
 288                 if (total_data <= *data_len && total_param <= *param_len) {
 289                         ret = True;
 290                         break;
 291                 }
 292
 293                 if (!cli_receive_smb(cli)) {
 294                         goto out;
 295                 }
 296
 297                 show_msg(cli->inbuf);
 298
 299                 /* sanity check */
 300                 if (CVAL(cli->inbuf,smb_com) != trans) {
 301                         DEBUG(0,("Expected %s response, got command 0x%02x\n",
 302                                  trans==SMBtrans?"SMBtrans":"SMBtrans2",
 303                                  CVAL(cli->inbuf,smb_com)));
 304                         goto out;
 305                 }
 306                 if (NT_STATUS_IS_ERR(cli_nt_error(cli))) {
 307                         goto out;
 308                 }
 309
 310                 /* parse out the total lengths again - they can shrink! */
 311                 if (SVAL(cli->inbuf,smb_tdrcnt) < total_data)
 312                         total_data = SVAL(cli->inbuf,smb_tdrcnt);
 313                 if (SVAL(cli->inbuf,smb_tprcnt) < total_param)
 314                         total_param = SVAL(cli->inbuf,smb_tprcnt);
 315
 316                 if (total_data <= *data_len && total_param <= *param_len) {
 317                         ret = True;
 318                         break;
 319                 }
 320         }
 321
 322   out:
 323
 324         client_set_trans_sign_state_off(cli, SVAL(cli->inbuf,smb_mid));
 325         return ret;
 326 }
 327
 328 /****************************************************************************
 329  Send a SMB nttrans request.
 330 ****************************************************************************/
 331
 332 BOOL cli_send_nt_trans(struct cli_state *cli,
 333                        int function,
 334                        int flags,
 335                        uint16 *setup, unsigned int lsetup, unsigned int msetup,
 336                        char *param, unsigned int lparam, unsigned int mparam,
 337                        char *data, unsigned int ldata, unsigned int mdata)
 338 {
 339         unsigned int i;
 340         unsigned int this_ldata,this_lparam;
 341         unsigned int tot_data=0,tot_param=0;
 342         uint16 mid;
 343         char *outdata,*outparam;
 344
 345         this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
 346         this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
 347
 348         memset(cli->outbuf,'\0',smb_size);
 349         set_message(cli->outbuf,19+lsetup,0,True);
 350         SCVAL(cli->outbuf,smb_com,SMBnttrans);
 351         SSVAL(cli->outbuf,smb_tid, cli->cnum);
 352         cli_setup_packet(cli);
 353
 354         /*
 355          * Save the mid we're using. We need this for finding
 356          * signing replies.
 357          */
 358
 359         mid = cli->mid;
 360
 361         outparam = smb_buf(cli->outbuf)+3;
 362         outdata = outparam+this_lparam;
 363
 364         /* primary request */
 365         SCVAL(cli->outbuf,smb_nt_MaxSetupCount,msetup);
 366         SCVAL(cli->outbuf,smb_nt_Flags,flags);
 367         SIVAL(cli->outbuf,smb_nt_TotalParameterCount, lparam);
 368         SIVAL(cli->outbuf,smb_nt_TotalDataCount, ldata);
 369         SIVAL(cli->outbuf,smb_nt_MaxParameterCount, mparam);
 370         SIVAL(cli->outbuf,smb_nt_MaxDataCount, mdata);
 371         SIVAL(cli->outbuf,smb_nt_ParameterCount, this_lparam);
 372         SIVAL(cli->outbuf,smb_nt_ParameterOffset, smb_offset(outparam,cli->outbuf));
 373         SIVAL(cli->outbuf,smb_nt_DataCount, this_ldata);
 374         SIVAL(cli->outbuf,smb_nt_DataOffset, smb_offset(outdata,cli->outbuf));
 375         SIVAL(cli->outbuf,smb_nt_SetupCount, lsetup);
 376         SIVAL(cli->outbuf,smb_nt_Function, function);
 377         for (i=0;i<lsetup;i++)          /* setup[] */
 378                 SSVAL(cli->outbuf,smb_nt_SetupStart+i*2,setup[i]);
 379
 380         if (this_lparam)                        /* param[] */
 381                 memcpy(outparam,param,this_lparam);
 382         if (this_ldata)                 /* data[] */
 383                 memcpy(outdata,data,this_ldata);
 384
 385         cli_setup_bcc(cli, outdata+this_ldata);
 386
 387         show_msg(cli->outbuf);
 388         if (!cli_send_smb(cli)) {
 389                 return False;
 390         }
 391
 392         /* Note we're in a trans state. Save the sequence
 393          * numbers for replies. */
 394         client_set_trans_sign_state_on(cli, mid);
 395
 396         if (this_ldata < ldata || this_lparam < lparam) {
 397                 /* receive interim response */
 398                 if (!cli_receive_smb(cli) || cli_is_error(cli)) {
 399                         client_set_trans_sign_state_off(cli, mid);
 400                         return(False);
 401                 }
 402
 403                 tot_data = this_ldata;
 404                 tot_param = this_lparam;
 405
 406                 while (tot_data < ldata || tot_param < lparam)  {
 407                         this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
 408                         this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
 409
 410                         set_message(cli->outbuf,18,0,True);
 411                         SCVAL(cli->outbuf,smb_com,SMBnttranss);
 412
 413                         /* XXX - these should probably be aligned */
 414                         outparam = smb_buf(cli->outbuf);
 415                         outdata = outparam+this_lparam;
 416
 417                         /* secondary request */
 418                         SIVAL(cli->outbuf,smb_nts_TotalParameterCount,lparam);
 419                         SIVAL(cli->outbuf,smb_nts_TotalDataCount,ldata);
 420                         SIVAL(cli->outbuf,smb_nts_ParameterCount,this_lparam);
 421                         SIVAL(cli->outbuf,smb_nts_ParameterOffset,smb_offset(outparam,cli->outbuf));
 422                         SIVAL(cli->outbuf,smb_nts_ParameterDisplacement,tot_param);
 423                         SIVAL(cli->outbuf,smb_nts_DataCount,this_ldata);
 424                         SIVAL(cli->outbuf,smb_nts_DataOffset,smb_offset(outdata,cli->outbuf));
 425                         SIVAL(cli->outbuf,smb_nts_DataDisplacement,tot_data);
 426                         if (this_lparam)                        /* param[] */
 427                                 memcpy(outparam,param+tot_param,this_lparam);
 428                         if (this_ldata)                 /* data[] */
 429                                 memcpy(outdata,data+tot_data,this_ldata);
 430                         cli_setup_bcc(cli, outdata+this_ldata);
 431
 432                         /*
 433                          * Save the mid we're using. We need this for finding
 434                          * signing replies.
 435                          */
 436                         mid = cli->mid;
 437
 438                         show_msg(cli->outbuf);
 439
 440                         if (!cli_send_smb(cli)) {
 441                                 client_set_trans_sign_state_off(cli, mid);
 442                                 return False;
 443                         }
 444
 445                         /* Ensure we use the same mid for the secondaries. */
 446                         cli->mid = mid;
 447
 448                         tot_data += this_ldata;
 449                         tot_param += this_lparam;
 450                 }
 451         }
 452
 453         return(True);
 454 }
 455
 456 /****************************************************************************
 457  Receive a SMB nttrans response allocating the necessary memory.
 458 ****************************************************************************/
 459
 460 BOOL cli_receive_nt_trans(struct cli_state *cli,
 461                           char **param, unsigned int *param_len,
 462                           char **data, unsigned int *data_len)
 463 {
 464         unsigned int total_data=0;
 465         unsigned int total_param=0;
 466         unsigned int this_data,this_param;
 467         uint8 eclass;
 468         uint32 ecode;
 469         BOOL ret = False;
 470
 471         *data_len = *param_len = 0;
 472
 473         if (!cli_receive_smb(cli)) {
 474                 return False;
 475         }
 476
 477         show_msg(cli->inbuf);
 478
 479         /* sanity check */
 480         if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 481                 DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 482                          CVAL(cli->inbuf,smb_com)));
 483                 return(False);
 484         }
 485
 486         /*
 487          * An NT RPC pipe call can return ERRDOS, ERRmoredata
 488          * to a trans call. This is not an error and should not
 489          * be treated as such.
 490          */
 491         if (cli_is_dos_error(cli)) {
 492                 cli_dos_error(cli, &eclass, &ecode);
 493                 if (!(eclass == ERRDOS && ecode == ERRmoredata)) {
 494                         goto out;
 495                 }
 496         }
 497
 498         /*
 499          * Likewise for NT_STATUS_BUFFER_TOO_SMALL
 500          */
 501         if (cli_is_nt_error(cli)) {
 502                 if (!NT_STATUS_EQUAL(cli_nt_error(cli),
 503                                      NT_STATUS_BUFFER_TOO_SMALL)) {
 504                         goto out;
 505                 }
 506         }
 507
 508         /* parse out the lengths */
 509         total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 510         total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 511
 512         /* allocate it */
 513         if (total_data) {
 514                 *data = SMB_REALLOC(*data,total_data);
 515                 if (!(*data)) {
 516                         DEBUG(0,("cli_receive_nt_trans: failed to enlarge data buffer to %d\n",total_data));
 517                         goto out;
 518                 }
 519         }
 520
 521         if (total_param) {
 522                 *param = SMB_REALLOC(*param,total_param);
 523                 if (!(*param)) {
 524                         DEBUG(0,("cli_receive_nt_trans: failed to enlarge param buffer to %d\n", total_param));
 525                         goto out;
 526                 }
 527         }
 528
 529         while (1)  {
 530                 this_data = SVAL(cli->inbuf,smb_ntr_DataCount);
 531                 this_param = SVAL(cli->inbuf,smb_ntr_ParameterCount);
 532
 533                 if (this_data + *data_len > total_data ||
 534                     this_param + *param_len > total_param) {
 535                         DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 536                         goto out;
 537                 }
 538
 539                 if (this_data + *data_len < this_data ||
 540                                 this_data + *data_len < *data_len ||
 541                                 this_param + *param_len < this_param ||
 542                                 this_param + *param_len < *param_len) {
 543                         DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 544                         goto out;
 545                 }
 546
 547                 if (this_data) {
 548                         unsigned int data_offset_out = SVAL(cli->inbuf,smb_ntr_DataDisplacement);
 549                         unsigned int data_offset_in = SVAL(cli->inbuf,smb_ntr_DataOffset);
 550
 551                         if (data_offset_out > total_data ||
 552                                         data_offset_out + this_data > total_data ||
 553                                         data_offset_out + this_data < data_offset_out ||
 554                                         data_offset_out + this_data < this_data) {
 555                                 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 556                                 goto out;
 557                         }
 558                         if (data_offset_in > cli->bufsize ||
 559                                         data_offset_in + this_data >  cli->bufsize ||
 560                                         data_offset_in + this_data < data_offset_in ||
 561                                         data_offset_in + this_data < this_data) {
 562                                 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 563                                 goto out;
 564                         }
 565
 566                         memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
 567                 }
 568
 569                 if (this_param) {
 570                         unsigned int param_offset_out = SVAL(cli->inbuf,smb_ntr_ParameterDisplacement);
 571                         unsigned int param_offset_in = SVAL(cli->inbuf,smb_ntr_ParameterOffset);
 572
 573                         if (param_offset_out > total_param ||
 574                                         param_offset_out + this_param > total_param ||
 575                                         param_offset_out + this_param < param_offset_out ||
 576                                         param_offset_out + this_param < this_param) {
 577                                 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
 578                                 goto out;
 579                         }
 580                         if (param_offset_in > cli->bufsize ||
 581                                         param_offset_in + this_param >  cli->bufsize ||
 582                                         param_offset_in + this_param < param_offset_in ||
 583                                         param_offset_in + this_param < this_param) {
 584                                 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
 585                                 goto out;
 586                         }
 587
 588                         memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
 589                 }
 590
 591                 *data_len += this_data;
 592                 *param_len += this_param;
 593
 594                 if (total_data <= *data_len && total_param <= *param_len) {
 595                         ret = True;
 596                         break;
 597                 }
 598
 599                 if (!cli_receive_smb(cli)) {
 600                         goto out;
 601                 }
 602
 603                 show_msg(cli->inbuf);
 604
 605                 /* sanity check */
 606                 if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 607                         DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 608                                  CVAL(cli->inbuf,smb_com)));
 609                         goto out;
 610                 }
 611                 if (cli_is_dos_error(cli)) {
 612                         cli_dos_error(cli, &eclass, &ecode);
 613                         if(!(eclass == ERRDOS && ecode == ERRmoredata)) {
 614                                 goto out;
 615                         }
 616                 }
 617                 /*
 618                  * Likewise for NT_STATUS_BUFFER_TOO_SMALL
 619                  */
 620                 if (cli_is_nt_error(cli)) {
 621                         if (!NT_STATUS_EQUAL(cli_nt_error(cli),
 622                                              NT_STATUS_BUFFER_TOO_SMALL)) {
 623                                 goto out;
 624                         }
 625                 }
 626
 627                 /* parse out the total lengths again - they can shrink! */
 628                 if (SVAL(cli->inbuf,smb_ntr_TotalDataCount) < total_data)
 629                         total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 630                 if (SVAL(cli->inbuf,smb_ntr_TotalParameterCount) < total_param)
 631                         total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 632
 633                 if (total_data <= *data_len && total_param <= *param_len) {
 634                         ret = True;
 635                         break;
 636                 }
 637         }
 638
 639   out:
 640
 641         client_set_trans_sign_state_off(cli, SVAL(cli->inbuf,smb_mid));
 642         return ret;
 643 }