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         /* 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) ||
 201             NT_STATUS_EQUAL(status,STATUS_NO_MORE_FILES) ||
 202             NT_STATUS_EQUAL(status,STATUS_INACCESSIBLE_SYSTEM_SHORTCUT)) {
 203                 goto out;
 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                 *data = (char *)SMB_REALLOC(*data,total_data);
 213                 if (!(*data)) {
 214                         DEBUG(0,("cli_receive_trans: failed to enlarge data buffer\n"));
 215                         goto out;
 216                 }
 217         }
 218
 219         if (total_param!=0) {
 220                 *param = (char *)SMB_REALLOC(*param,total_param);
 221                 if (!(*param)) {
 222                         DEBUG(0,("cli_receive_trans: failed to enlarge param buffer\n"));
 223                         goto out;
 224                 }
 225         }
 226
 227         for (;;)  {
 228                 this_data = SVAL(cli->inbuf,smb_drcnt);
 229                 this_param = SVAL(cli->inbuf,smb_prcnt);
 230
 231                 if (this_data + *data_len > total_data ||
 232                     this_param + *param_len > total_param) {
 233                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 234                         goto out;
 235                 }
 236
 237                 if (this_data + *data_len < this_data ||
 238                                 this_data + *data_len < *data_len ||
 239                                 this_param + *param_len < this_param ||
 240                                 this_param + *param_len < *param_len) {
 241                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 242                         goto out;
 243                 }
 244
 245                 if (this_data) {
 246                         unsigned int data_offset_out = SVAL(cli->inbuf,smb_drdisp);
 247                         unsigned int data_offset_in = SVAL(cli->inbuf,smb_droff);
 248
 249                         if (data_offset_out > total_data ||
 250                                         data_offset_out + this_data > total_data ||
 251                                         data_offset_out + this_data < data_offset_out ||
 252                                         data_offset_out + this_data < this_data) {
 253                                 DEBUG(1,("Data overflow in cli_receive_trans\n"));
 254                                 goto out;
 255                         }
 256                         if (data_offset_in > cli->bufsize ||
 257                                         data_offset_in + this_data >  cli->bufsize ||
 258                                         data_offset_in + this_data < data_offset_in ||
 259                                         data_offset_in + this_data < this_data) {
 260                                 DEBUG(1,("Data overflow in cli_receive_trans\n"));
 261                                 goto out;
 262                         }
 263
 264                         memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
 265                 }
 266                 if (this_param) {
 267                         unsigned int param_offset_out = SVAL(cli->inbuf,smb_prdisp);
 268                         unsigned int param_offset_in = SVAL(cli->inbuf,smb_proff);
 269
 270                         if (param_offset_out > total_param ||
 271                                         param_offset_out + this_param > total_param ||
 272                                         param_offset_out + this_param < param_offset_out ||
 273                                         param_offset_out + this_param < this_param) {
 274                                 DEBUG(1,("Param overflow in cli_receive_trans\n"));
 275                                 goto out;
 276                         }
 277                         if (param_offset_in > cli->bufsize ||
 278                                         param_offset_in + this_param >  cli->bufsize ||
 279                                         param_offset_in + this_param < param_offset_in ||
 280                                         param_offset_in + this_param < this_param) {
 281                                 DEBUG(1,("Param overflow in cli_receive_trans\n"));
 282                                 goto out;
 283                         }
 284
 285                         memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
 286                 }
 287                 *data_len += this_data;
 288                 *param_len += this_param;
 289
 290                 if (total_data <= *data_len && total_param <= *param_len) {
 291                         ret = True;
 292                         break;
 293                 }
 294
 295                 if (!cli_receive_smb(cli)) {
 296                         goto out;
 297                 }
 298
 299                 show_msg(cli->inbuf);
 300
 301                 /* sanity check */
 302                 if (CVAL(cli->inbuf,smb_com) != trans) {
 303                         DEBUG(0,("Expected %s response, got command 0x%02x\n",
 304                                  trans==SMBtrans?"SMBtrans":"SMBtrans2",
 305                                  CVAL(cli->inbuf,smb_com)));
 306                         goto out;
 307                 }
 308                 if (NT_STATUS_IS_ERR(cli_nt_error(cli))) {
 309                         goto out;
 310                 }
 311
 312                 /* parse out the total lengths again - they can shrink! */
 313                 if (SVAL(cli->inbuf,smb_tdrcnt) < total_data)
 314                         total_data = SVAL(cli->inbuf,smb_tdrcnt);
 315                 if (SVAL(cli->inbuf,smb_tprcnt) < total_param)
 316                         total_param = SVAL(cli->inbuf,smb_tprcnt);
 317
 318                 if (total_data <= *data_len && total_param <= *param_len) {
 319                         ret = True;
 320                         break;
 321                 }
 322         }
 323
 324   out:
 325
 326         client_set_trans_sign_state_off(cli, SVAL(cli->inbuf,smb_mid));
 327         return ret;
 328 }
 329
 330 /****************************************************************************
 331  Send a SMB nttrans request.
 332 ****************************************************************************/
 333
 334 BOOL cli_send_nt_trans(struct cli_state *cli,
 335                        int function,
 336                        int flags,
 337                        uint16 *setup, unsigned int lsetup, unsigned int msetup,
 338                        char *param, unsigned int lparam, unsigned int mparam,
 339                        char *data, unsigned int ldata, unsigned int mdata)
 340 {
 341         unsigned int i;
 342         unsigned int this_ldata,this_lparam;
 343         unsigned int tot_data=0,tot_param=0;
 344         uint16 mid;
 345         char *outdata,*outparam;
 346
 347         this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
 348         this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
 349
 350         memset(cli->outbuf,'\0',smb_size);
 351         set_message(cli->outbuf,19+lsetup,0,True);
 352         SCVAL(cli->outbuf,smb_com,SMBnttrans);
 353         SSVAL(cli->outbuf,smb_tid, cli->cnum);
 354         cli_setup_packet(cli);
 355
 356         /*
 357          * Save the mid we're using. We need this for finding
 358          * signing replies.
 359          */
 360
 361         mid = cli->mid;
 362
 363         outparam = smb_buf(cli->outbuf)+3;
 364         outdata = outparam+this_lparam;
 365
 366         /* primary request */
 367         SCVAL(cli->outbuf,smb_nt_MaxSetupCount,msetup);
 368         SCVAL(cli->outbuf,smb_nt_Flags,flags);
 369         SIVAL(cli->outbuf,smb_nt_TotalParameterCount, lparam);
 370         SIVAL(cli->outbuf,smb_nt_TotalDataCount, ldata);
 371         SIVAL(cli->outbuf,smb_nt_MaxParameterCount, mparam);
 372         SIVAL(cli->outbuf,smb_nt_MaxDataCount, mdata);
 373         SIVAL(cli->outbuf,smb_nt_ParameterCount, this_lparam);
 374         SIVAL(cli->outbuf,smb_nt_ParameterOffset, smb_offset(outparam,cli->outbuf));
 375         SIVAL(cli->outbuf,smb_nt_DataCount, this_ldata);
 376         SIVAL(cli->outbuf,smb_nt_DataOffset, smb_offset(outdata,cli->outbuf));
 377         SIVAL(cli->outbuf,smb_nt_SetupCount, lsetup);
 378         SIVAL(cli->outbuf,smb_nt_Function, function);
 379         for (i=0;i<lsetup;i++)          /* setup[] */
 380                 SSVAL(cli->outbuf,smb_nt_SetupStart+i*2,setup[i]);
 381
 382         if (this_lparam)                        /* param[] */
 383                 memcpy(outparam,param,this_lparam);
 384         if (this_ldata)                 /* data[] */
 385                 memcpy(outdata,data,this_ldata);
 386
 387         cli_setup_bcc(cli, outdata+this_ldata);
 388
 389         show_msg(cli->outbuf);
 390         if (!cli_send_smb(cli)) {
 391                 return False;
 392         }
 393
 394         /* Note we're in a trans state. Save the sequence
 395          * numbers for replies. */
 396         client_set_trans_sign_state_on(cli, mid);
 397
 398         if (this_ldata < ldata || this_lparam < lparam) {
 399                 /* receive interim response */
 400                 if (!cli_receive_smb(cli) || cli_is_error(cli)) {
 401                         client_set_trans_sign_state_off(cli, mid);
 402                         return(False);
 403                 }
 404
 405                 tot_data = this_ldata;
 406                 tot_param = this_lparam;
 407
 408                 while (tot_data < ldata || tot_param < lparam)  {
 409                         this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
 410                         this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
 411
 412                         set_message(cli->outbuf,18,0,True);
 413                         SCVAL(cli->outbuf,smb_com,SMBnttranss);
 414
 415                         /* XXX - these should probably be aligned */
 416                         outparam = smb_buf(cli->outbuf);
 417                         outdata = outparam+this_lparam;
 418
 419                         /* secondary request */
 420                         SIVAL(cli->outbuf,smb_nts_TotalParameterCount,lparam);
 421                         SIVAL(cli->outbuf,smb_nts_TotalDataCount,ldata);
 422                         SIVAL(cli->outbuf,smb_nts_ParameterCount,this_lparam);
 423                         SIVAL(cli->outbuf,smb_nts_ParameterOffset,smb_offset(outparam,cli->outbuf));
 424                         SIVAL(cli->outbuf,smb_nts_ParameterDisplacement,tot_param);
 425                         SIVAL(cli->outbuf,smb_nts_DataCount,this_ldata);
 426                         SIVAL(cli->outbuf,smb_nts_DataOffset,smb_offset(outdata,cli->outbuf));
 427                         SIVAL(cli->outbuf,smb_nts_DataDisplacement,tot_data);
 428                         if (this_lparam)                        /* param[] */
 429                                 memcpy(outparam,param+tot_param,this_lparam);
 430                         if (this_ldata)                 /* data[] */
 431                                 memcpy(outdata,data+tot_data,this_ldata);
 432                         cli_setup_bcc(cli, outdata+this_ldata);
 433
 434                         /*
 435                          * Save the mid we're using. We need this for finding
 436                          * signing replies.
 437                          */
 438                         mid = cli->mid;
 439
 440                         show_msg(cli->outbuf);
 441
 442                         if (!cli_send_smb(cli)) {
 443                                 client_set_trans_sign_state_off(cli, mid);
 444                                 return False;
 445                         }
 446
 447                         /* Ensure we use the same mid for the secondaries. */
 448                         cli->mid = mid;
 449
 450                         tot_data += this_ldata;
 451                         tot_param += this_lparam;
 452                 }
 453         }
 454
 455         return(True);
 456 }
 457
 458 /****************************************************************************
 459  Receive a SMB nttrans response allocating the necessary memory.
 460 ****************************************************************************/
 461
 462 BOOL cli_receive_nt_trans(struct cli_state *cli,
 463                           char **param, unsigned int *param_len,
 464                           char **data, unsigned int *data_len)
 465 {
 466         unsigned int total_data=0;
 467         unsigned int total_param=0;
 468         unsigned int this_data,this_param;
 469         uint8 eclass;
 470         uint32 ecode;
 471         BOOL ret = False;
 472
 473         *data_len = *param_len = 0;
 474
 475         if (!cli_receive_smb(cli)) {
 476                 return False;
 477         }
 478
 479         show_msg(cli->inbuf);
 480
 481         /* sanity check */
 482         if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 483                 DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 484                          CVAL(cli->inbuf,smb_com)));
 485                 return(False);
 486         }
 487
 488         /*
 489          * An NT RPC pipe call can return ERRDOS, ERRmoredata
 490          * to a trans call. This is not an error and should not
 491          * be treated as such.
 492          */
 493         if (cli_is_dos_error(cli)) {
 494                 cli_dos_error(cli, &eclass, &ecode);
 495                 if (!(eclass == ERRDOS && ecode == ERRmoredata)) {
 496                         goto out;
 497                 }
 498         }
 499
 500         /*
 501          * Likewise for NT_STATUS_BUFFER_TOO_SMALL
 502          */
 503         if (cli_is_nt_error(cli)) {
 504                 if (!NT_STATUS_EQUAL(cli_nt_error(cli),
 505                                      NT_STATUS_BUFFER_TOO_SMALL)) {
 506                         goto out;
 507                 }
 508         }
 509
 510         /* parse out the lengths */
 511         total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 512         total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 513
 514         /* allocate it */
 515         if (total_data) {
 516                 *data = (char *)SMB_REALLOC(*data,total_data);
 517                 if (!(*data)) {
 518                         DEBUG(0,("cli_receive_nt_trans: failed to enlarge data buffer to %d\n",total_data));
 519                         goto out;
 520                 }
 521         }
 522
 523         if (total_param) {
 524                 *param = (char *)SMB_REALLOC(*param,total_param);
 525                 if (!(*param)) {
 526                         DEBUG(0,("cli_receive_nt_trans: failed to enlarge param buffer to %d\n", total_param));
 527                         goto out;
 528                 }
 529         }
 530
 531         while (1)  {
 532                 this_data = SVAL(cli->inbuf,smb_ntr_DataCount);
 533                 this_param = SVAL(cli->inbuf,smb_ntr_ParameterCount);
 534
 535                 if (this_data + *data_len > total_data ||
 536                     this_param + *param_len > total_param) {
 537                         DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 538                         goto out;
 539                 }
 540
 541                 if (this_data + *data_len < this_data ||
 542                                 this_data + *data_len < *data_len ||
 543                                 this_param + *param_len < this_param ||
 544                                 this_param + *param_len < *param_len) {
 545                         DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 546                         goto out;
 547                 }
 548
 549                 if (this_data) {
 550                         unsigned int data_offset_out = SVAL(cli->inbuf,smb_ntr_DataDisplacement);
 551                         unsigned int data_offset_in = SVAL(cli->inbuf,smb_ntr_DataOffset);
 552
 553                         if (data_offset_out > total_data ||
 554                                         data_offset_out + this_data > total_data ||
 555                                         data_offset_out + this_data < data_offset_out ||
 556                                         data_offset_out + this_data < this_data) {
 557                                 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 558                                 goto out;
 559                         }
 560                         if (data_offset_in > cli->bufsize ||
 561                                         data_offset_in + this_data >  cli->bufsize ||
 562                                         data_offset_in + this_data < data_offset_in ||
 563                                         data_offset_in + this_data < this_data) {
 564                                 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 565                                 goto out;
 566                         }
 567
 568                         memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
 569                 }
 570
 571                 if (this_param) {
 572                         unsigned int param_offset_out = SVAL(cli->inbuf,smb_ntr_ParameterDisplacement);
 573                         unsigned int param_offset_in = SVAL(cli->inbuf,smb_ntr_ParameterOffset);
 574
 575                         if (param_offset_out > total_param ||
 576                                         param_offset_out + this_param > total_param ||
 577                                         param_offset_out + this_param < param_offset_out ||
 578                                         param_offset_out + this_param < this_param) {
 579                                 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
 580                                 goto out;
 581                         }
 582                         if (param_offset_in > cli->bufsize ||
 583                                         param_offset_in + this_param >  cli->bufsize ||
 584                                         param_offset_in + this_param < param_offset_in ||
 585                                         param_offset_in + this_param < this_param) {
 586                                 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
 587                                 goto out;
 588                         }
 589
 590                         memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
 591                 }
 592
 593                 *data_len += this_data;
 594                 *param_len += this_param;
 595
 596                 if (total_data <= *data_len && total_param <= *param_len) {
 597                         ret = True;
 598                         break;
 599                 }
 600
 601                 if (!cli_receive_smb(cli)) {
 602                         goto out;
 603                 }
 604
 605                 show_msg(cli->inbuf);
 606
 607                 /* sanity check */
 608                 if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 609                         DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 610                                  CVAL(cli->inbuf,smb_com)));
 611                         goto out;
 612                 }
 613                 if (cli_is_dos_error(cli)) {
 614                         cli_dos_error(cli, &eclass, &ecode);
 615                         if(!(eclass == ERRDOS && ecode == ERRmoredata)) {
 616                                 goto out;
 617                         }
 618                 }
 619                 /*
 620                  * Likewise for NT_STATUS_BUFFER_TOO_SMALL
 621                  */
 622                 if (cli_is_nt_error(cli)) {
 623                         if (!NT_STATUS_EQUAL(cli_nt_error(cli),
 624                                              NT_STATUS_BUFFER_TOO_SMALL)) {
 625                                 goto out;
 626                         }
 627                 }
 628
 629                 /* parse out the total lengths again - they can shrink! */
 630                 if (SVAL(cli->inbuf,smb_ntr_TotalDataCount) < total_data)
 631                         total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 632                 if (SVAL(cli->inbuf,smb_ntr_TotalParameterCount) < total_param)
 633                         total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 634
 635                 if (total_data <= *data_len && total_param <= *param_len) {
 636                         ret = True;
 637                         break;
 638                 }
 639         }
 640
 641   out:
 642
 643         client_set_trans_sign_state_off(cli, SVAL(cli->inbuf,smb_mid));
 644         return ret;
 645 }