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          * When setting up an encrypted transport we can also
 198          * see NT_STATUS_MORE_PROCESSING_REQUIRED here.
 199          */
 200         status = cli_nt_error(cli);
 201
 202         if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 203                 if (NT_STATUS_IS_ERR(status) || NT_STATUS_EQUAL(status,STATUS_NO_MORE_FILES)) {
 204                         goto out;
 205                 }
 206         }
 207
 208         /* parse out the lengths */
 209         total_data = SVAL(cli->inbuf,smb_tdrcnt);
 210         total_param = SVAL(cli->inbuf,smb_tprcnt);
 211
 212         /* allocate it */
 213         if (total_data!=0) {
 214                 *data = (char *)SMB_REALLOC(*data,total_data);
 215                 if (!(*data)) {
 216                         DEBUG(0,("cli_receive_trans: failed to enlarge data buffer\n"));
 217                         goto out;
 218                 }
 219         }
 220
 221         if (total_param!=0) {
 222                 *param = (char *)SMB_REALLOC(*param,total_param);
 223                 if (!(*param)) {
 224                         DEBUG(0,("cli_receive_trans: failed to enlarge param buffer\n"));
 225                         goto out;
 226                 }
 227         }
 228
 229         for (;;)  {
 230                 this_data = SVAL(cli->inbuf,smb_drcnt);
 231                 this_param = SVAL(cli->inbuf,smb_prcnt);
 232
 233                 if (this_data + *data_len > total_data ||
 234                     this_param + *param_len > total_param) {
 235                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 236                         goto out;
 237                 }
 238
 239                 if (this_data + *data_len < this_data ||
 240                                 this_data + *data_len < *data_len ||
 241                                 this_param + *param_len < this_param ||
 242                                 this_param + *param_len < *param_len) {
 243                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 244                         goto out;
 245                 }
 246
 247                 if (this_data) {
 248                         unsigned int data_offset_out = SVAL(cli->inbuf,smb_drdisp);
 249                         unsigned int data_offset_in = SVAL(cli->inbuf,smb_droff);
 250
 251                         if (data_offset_out > total_data ||
 252                                         data_offset_out + this_data > total_data ||
 253                                         data_offset_out + this_data < data_offset_out ||
 254                                         data_offset_out + this_data < this_data) {
 255                                 DEBUG(1,("Data overflow in cli_receive_trans\n"));
 256                                 goto out;
 257                         }
 258                         if (data_offset_in > cli->bufsize ||
 259                                         data_offset_in + this_data >  cli->bufsize ||
 260                                         data_offset_in + this_data < data_offset_in ||
 261                                         data_offset_in + this_data < this_data) {
 262                                 DEBUG(1,("Data overflow in cli_receive_trans\n"));
 263                                 goto out;
 264                         }
 265
 266                         memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
 267                 }
 268                 if (this_param) {
 269                         unsigned int param_offset_out = SVAL(cli->inbuf,smb_prdisp);
 270                         unsigned int param_offset_in = SVAL(cli->inbuf,smb_proff);
 271
 272                         if (param_offset_out > total_param ||
 273                                         param_offset_out + this_param > total_param ||
 274                                         param_offset_out + this_param < param_offset_out ||
 275                                         param_offset_out + this_param < this_param) {
 276                                 DEBUG(1,("Param overflow in cli_receive_trans\n"));
 277                                 goto out;
 278                         }
 279                         if (param_offset_in > cli->bufsize ||
 280                                         param_offset_in + this_param >  cli->bufsize ||
 281                                         param_offset_in + this_param < param_offset_in ||
 282                                         param_offset_in + this_param < this_param) {
 283                                 DEBUG(1,("Param overflow in cli_receive_trans\n"));
 284                                 goto out;
 285                         }
 286
 287                         memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
 288                 }
 289                 *data_len += this_data;
 290                 *param_len += this_param;
 291
 292                 if (total_data <= *data_len && total_param <= *param_len) {
 293                         ret = True;
 294                         break;
 295                 }
 296
 297                 if (!cli_receive_smb(cli)) {
 298                         goto out;
 299                 }
 300
 301                 show_msg(cli->inbuf);
 302
 303                 /* sanity check */
 304                 if (CVAL(cli->inbuf,smb_com) != trans) {
 305                         DEBUG(0,("Expected %s response, got command 0x%02x\n",
 306                                  trans==SMBtrans?"SMBtrans":"SMBtrans2",
 307                                  CVAL(cli->inbuf,smb_com)));
 308                         goto out;
 309                 }
 310                 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 311                         if (NT_STATUS_IS_ERR(cli_nt_error(cli))) {
 312                                 goto out;
 313                         }
 314                 }
 315
 316                 /* parse out the total lengths again - they can shrink! */
 317                 if (SVAL(cli->inbuf,smb_tdrcnt) < total_data)
 318                         total_data = SVAL(cli->inbuf,smb_tdrcnt);
 319                 if (SVAL(cli->inbuf,smb_tprcnt) < total_param)
 320                         total_param = SVAL(cli->inbuf,smb_tprcnt);
 321
 322                 if (total_data <= *data_len && total_param <= *param_len) {
 323                         ret = True;
 324                         break;
 325                 }
 326         }
 327
 328   out:
 329
 330         client_set_trans_sign_state_off(cli, SVAL(cli->inbuf,smb_mid));
 331         return ret;
 332 }
 333
 334 /****************************************************************************
 335  Send a SMB nttrans request.
 336 ****************************************************************************/
 337
 338 BOOL cli_send_nt_trans(struct cli_state *cli,
 339                        int function,
 340                        int flags,
 341                        uint16 *setup, unsigned int lsetup, unsigned int msetup,
 342                        char *param, unsigned int lparam, unsigned int mparam,
 343                        char *data, unsigned int ldata, unsigned int mdata)
 344 {
 345         unsigned int i;
 346         unsigned int this_ldata,this_lparam;
 347         unsigned int tot_data=0,tot_param=0;
 348         uint16 mid;
 349         char *outdata,*outparam;
 350
 351         this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
 352         this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
 353
 354         memset(cli->outbuf,'\0',smb_size);
 355         set_message(cli->outbuf,19+lsetup,0,True);
 356         SCVAL(cli->outbuf,smb_com,SMBnttrans);
 357         SSVAL(cli->outbuf,smb_tid, cli->cnum);
 358         cli_setup_packet(cli);
 359
 360         /*
 361          * Save the mid we're using. We need this for finding
 362          * signing replies.
 363          */
 364
 365         mid = cli->mid;
 366
 367         outparam = smb_buf(cli->outbuf)+3;
 368         outdata = outparam+this_lparam;
 369
 370         /* primary request */
 371         SCVAL(cli->outbuf,smb_nt_MaxSetupCount,msetup);
 372         SCVAL(cli->outbuf,smb_nt_Flags,flags);
 373         SIVAL(cli->outbuf,smb_nt_TotalParameterCount, lparam);
 374         SIVAL(cli->outbuf,smb_nt_TotalDataCount, ldata);
 375         SIVAL(cli->outbuf,smb_nt_MaxParameterCount, mparam);
 376         SIVAL(cli->outbuf,smb_nt_MaxDataCount, mdata);
 377         SIVAL(cli->outbuf,smb_nt_ParameterCount, this_lparam);
 378         SIVAL(cli->outbuf,smb_nt_ParameterOffset, smb_offset(outparam,cli->outbuf));
 379         SIVAL(cli->outbuf,smb_nt_DataCount, this_ldata);
 380         SIVAL(cli->outbuf,smb_nt_DataOffset, smb_offset(outdata,cli->outbuf));
 381         SIVAL(cli->outbuf,smb_nt_SetupCount, lsetup);
 382         SIVAL(cli->outbuf,smb_nt_Function, function);
 383         for (i=0;i<lsetup;i++)          /* setup[] */
 384                 SSVAL(cli->outbuf,smb_nt_SetupStart+i*2,setup[i]);
 385
 386         if (this_lparam)                        /* param[] */
 387                 memcpy(outparam,param,this_lparam);
 388         if (this_ldata)                 /* data[] */
 389                 memcpy(outdata,data,this_ldata);
 390
 391         cli_setup_bcc(cli, outdata+this_ldata);
 392
 393         show_msg(cli->outbuf);
 394         if (!cli_send_smb(cli)) {
 395                 return False;
 396         }
 397
 398         /* Note we're in a trans state. Save the sequence
 399          * numbers for replies. */
 400         client_set_trans_sign_state_on(cli, mid);
 401
 402         if (this_ldata < ldata || this_lparam < lparam) {
 403                 /* receive interim response */
 404                 if (!cli_receive_smb(cli) || cli_is_error(cli)) {
 405                         client_set_trans_sign_state_off(cli, mid);
 406                         return(False);
 407                 }
 408
 409                 tot_data = this_ldata;
 410                 tot_param = this_lparam;
 411
 412                 while (tot_data < ldata || tot_param < lparam)  {
 413                         this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
 414                         this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
 415
 416                         set_message(cli->outbuf,18,0,True);
 417                         SCVAL(cli->outbuf,smb_com,SMBnttranss);
 418
 419                         /* XXX - these should probably be aligned */
 420                         outparam = smb_buf(cli->outbuf);
 421                         outdata = outparam+this_lparam;
 422
 423                         /* secondary request */
 424                         SIVAL(cli->outbuf,smb_nts_TotalParameterCount,lparam);
 425                         SIVAL(cli->outbuf,smb_nts_TotalDataCount,ldata);
 426                         SIVAL(cli->outbuf,smb_nts_ParameterCount,this_lparam);
 427                         SIVAL(cli->outbuf,smb_nts_ParameterOffset,smb_offset(outparam,cli->outbuf));
 428                         SIVAL(cli->outbuf,smb_nts_ParameterDisplacement,tot_param);
 429                         SIVAL(cli->outbuf,smb_nts_DataCount,this_ldata);
 430                         SIVAL(cli->outbuf,smb_nts_DataOffset,smb_offset(outdata,cli->outbuf));
 431                         SIVAL(cli->outbuf,smb_nts_DataDisplacement,tot_data);
 432                         if (this_lparam)                        /* param[] */
 433                                 memcpy(outparam,param+tot_param,this_lparam);
 434                         if (this_ldata)                 /* data[] */
 435                                 memcpy(outdata,data+tot_data,this_ldata);
 436                         cli_setup_bcc(cli, outdata+this_ldata);
 437
 438                         /*
 439                          * Save the mid we're using. We need this for finding
 440                          * signing replies.
 441                          */
 442                         mid = cli->mid;
 443
 444                         show_msg(cli->outbuf);
 445
 446                         if (!cli_send_smb(cli)) {
 447                                 client_set_trans_sign_state_off(cli, mid);
 448                                 return False;
 449                         }
 450
 451                         /* Ensure we use the same mid for the secondaries. */
 452                         cli->mid = mid;
 453
 454                         tot_data += this_ldata;
 455                         tot_param += this_lparam;
 456                 }
 457         }
 458
 459         return(True);
 460 }
 461
 462 /****************************************************************************
 463  Receive a SMB nttrans response allocating the necessary memory.
 464 ****************************************************************************/
 465
 466 BOOL cli_receive_nt_trans(struct cli_state *cli,
 467                           char **param, unsigned int *param_len,
 468                           char **data, unsigned int *data_len)
 469 {
 470         unsigned int total_data=0;
 471         unsigned int total_param=0;
 472         unsigned int this_data,this_param;
 473         uint8 eclass;
 474         uint32 ecode;
 475         BOOL ret = False;
 476
 477         *data_len = *param_len = 0;
 478
 479         if (!cli_receive_smb(cli)) {
 480                 return False;
 481         }
 482
 483         show_msg(cli->inbuf);
 484
 485         /* sanity check */
 486         if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 487                 DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 488                          CVAL(cli->inbuf,smb_com)));
 489                 return(False);
 490         }
 491
 492         /*
 493          * An NT RPC pipe call can return ERRDOS, ERRmoredata
 494          * to a trans call. This is not an error and should not
 495          * be treated as such.
 496          */
 497         if (cli_is_dos_error(cli)) {
 498                 cli_dos_error(cli, &eclass, &ecode);
 499                 if (!(eclass == ERRDOS && ecode == ERRmoredata)) {
 500                         goto out;
 501                 }
 502         }
 503
 504         /*
 505          * Likewise for NT_STATUS_BUFFER_TOO_SMALL
 506          */
 507         if (cli_is_nt_error(cli)) {
 508                 if (!NT_STATUS_EQUAL(cli_nt_error(cli),
 509                                      NT_STATUS_BUFFER_TOO_SMALL)) {
 510                         goto out;
 511                 }
 512         }
 513
 514         /* parse out the lengths */
 515         total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 516         total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 517
 518         /* allocate it */
 519         if (total_data) {
 520                 *data = (char *)SMB_REALLOC(*data,total_data);
 521                 if (!(*data)) {
 522                         DEBUG(0,("cli_receive_nt_trans: failed to enlarge data buffer to %d\n",total_data));
 523                         goto out;
 524                 }
 525         }
 526
 527         if (total_param) {
 528                 *param = (char *)SMB_REALLOC(*param,total_param);
 529                 if (!(*param)) {
 530                         DEBUG(0,("cli_receive_nt_trans: failed to enlarge param buffer to %d\n", total_param));
 531                         goto out;
 532                 }
 533         }
 534
 535         while (1)  {
 536                 this_data = SVAL(cli->inbuf,smb_ntr_DataCount);
 537                 this_param = SVAL(cli->inbuf,smb_ntr_ParameterCount);
 538
 539                 if (this_data + *data_len > total_data ||
 540                     this_param + *param_len > total_param) {
 541                         DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 542                         goto out;
 543                 }
 544
 545                 if (this_data + *data_len < this_data ||
 546                                 this_data + *data_len < *data_len ||
 547                                 this_param + *param_len < this_param ||
 548                                 this_param + *param_len < *param_len) {
 549                         DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 550                         goto out;
 551                 }
 552
 553                 if (this_data) {
 554                         unsigned int data_offset_out = SVAL(cli->inbuf,smb_ntr_DataDisplacement);
 555                         unsigned int data_offset_in = SVAL(cli->inbuf,smb_ntr_DataOffset);
 556
 557                         if (data_offset_out > total_data ||
 558                                         data_offset_out + this_data > total_data ||
 559                                         data_offset_out + this_data < data_offset_out ||
 560                                         data_offset_out + this_data < this_data) {
 561                                 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 562                                 goto out;
 563                         }
 564                         if (data_offset_in > cli->bufsize ||
 565                                         data_offset_in + this_data >  cli->bufsize ||
 566                                         data_offset_in + this_data < data_offset_in ||
 567                                         data_offset_in + this_data < this_data) {
 568                                 DEBUG(1,("Data overflow in cli_receive_nt_trans\n"));
 569                                 goto out;
 570                         }
 571
 572                         memcpy(*data + data_offset_out, smb_base(cli->inbuf) + data_offset_in, this_data);
 573                 }
 574
 575                 if (this_param) {
 576                         unsigned int param_offset_out = SVAL(cli->inbuf,smb_ntr_ParameterDisplacement);
 577                         unsigned int param_offset_in = SVAL(cli->inbuf,smb_ntr_ParameterOffset);
 578
 579                         if (param_offset_out > total_param ||
 580                                         param_offset_out + this_param > total_param ||
 581                                         param_offset_out + this_param < param_offset_out ||
 582                                         param_offset_out + this_param < this_param) {
 583                                 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
 584                                 goto out;
 585                         }
 586                         if (param_offset_in > cli->bufsize ||
 587                                         param_offset_in + this_param >  cli->bufsize ||
 588                                         param_offset_in + this_param < param_offset_in ||
 589                                         param_offset_in + this_param < this_param) {
 590                                 DEBUG(1,("Param overflow in cli_receive_nt_trans\n"));
 591                                 goto out;
 592                         }
 593
 594                         memcpy(*param + param_offset_out, smb_base(cli->inbuf) + param_offset_in, this_param);
 595                 }
 596
 597                 *data_len += this_data;
 598                 *param_len += this_param;
 599
 600                 if (total_data <= *data_len && total_param <= *param_len) {
 601                         ret = True;
 602                         break;
 603                 }
 604
 605                 if (!cli_receive_smb(cli)) {
 606                         goto out;
 607                 }
 608
 609                 show_msg(cli->inbuf);
 610
 611                 /* sanity check */
 612                 if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 613                         DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 614                                  CVAL(cli->inbuf,smb_com)));
 615                         goto out;
 616                 }
 617                 if (cli_is_dos_error(cli)) {
 618                         cli_dos_error(cli, &eclass, &ecode);
 619                         if(!(eclass == ERRDOS && ecode == ERRmoredata)) {
 620                                 goto out;
 621                         }
 622                 }
 623                 /*
 624                  * Likewise for NT_STATUS_BUFFER_TOO_SMALL
 625                  */
 626                 if (cli_is_nt_error(cli)) {
 627                         if (!NT_STATUS_EQUAL(cli_nt_error(cli),
 628                                              NT_STATUS_BUFFER_TOO_SMALL)) {
 629                                 goto out;
 630                         }
 631                 }
 632
 633                 /* parse out the total lengths again - they can shrink! */
 634                 if (SVAL(cli->inbuf,smb_ntr_TotalDataCount) < total_data)
 635                         total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 636                 if (SVAL(cli->inbuf,smb_ntr_TotalParameterCount) < total_param)
 637                         total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 638
 639                 if (total_data <= *data_len && total_param <= *param_len) {
 640                         ret = True;
 641                         break;
 642                 }
 643         }
 644
 645   out:
 646
 647         client_set_trans_sign_state_off(cli, SVAL(cli->inbuf,smb_mid));
 648         return ret;
 649 }