source/libsmb/clitrans.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 3.0
   4    client transaction calls
   5    Copyright (C) Andrew Tridgell 1994-1998
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #define NO_SYSLOG
  23
  24 #include "includes.h"
  25
  26
  27 /****************************************************************************
  28   send a SMB trans or trans2 request
  29   ****************************************************************************/
  30 BOOL cli_send_trans(struct cli_state *cli, int trans,
  31                     const char *pipe_name,
  32                     int fid, int flags,
  33                     uint16 *setup, int lsetup, int msetup,
  34                     char *param, int lparam, int mparam,
  35                     char *data, int ldata, int mdata)
  36 {
  37         int i;
  38         int this_ldata,this_lparam;
  39         int tot_data=0,tot_param=0;
  40         char *outdata,*outparam;
  41         char *p;
  42         int pipe_name_len=0;
  43
  44         this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
  45         this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
  46
  47         memset(cli->outbuf,'\0',smb_size);
  48         set_message(cli->outbuf,14+lsetup,0,True);
  49         CVAL(cli->outbuf,smb_com) = trans;
  50         SSVAL(cli->outbuf,smb_tid, cli->cnum);
  51         cli_setup_packet(cli);
  52
  53         if (pipe_name) {
  54                 pipe_name_len = clistr_push(cli, smb_buf(cli->outbuf), pipe_name, -1, STR_TERMINATE);
  55         }
  56
  57         outparam = smb_buf(cli->outbuf)+(trans==SMBtrans ? pipe_name_len : 3);
  58         outdata = outparam+this_lparam;
  59
  60         /* primary request */
  61         SSVAL(cli->outbuf,smb_tpscnt,lparam);   /* tpscnt */
  62         SSVAL(cli->outbuf,smb_tdscnt,ldata);    /* tdscnt */
  63         SSVAL(cli->outbuf,smb_mprcnt,mparam);   /* mprcnt */
  64         SSVAL(cli->outbuf,smb_mdrcnt,mdata);    /* mdrcnt */
  65         SCVAL(cli->outbuf,smb_msrcnt,msetup);   /* msrcnt */
  66         SSVAL(cli->outbuf,smb_flags,flags);     /* flags */
  67         SIVAL(cli->outbuf,smb_timeout,0);               /* timeout */
  68         SSVAL(cli->outbuf,smb_pscnt,this_lparam);       /* pscnt */
  69         SSVAL(cli->outbuf,smb_psoff,smb_offset(outparam,cli->outbuf)); /* psoff */
  70         SSVAL(cli->outbuf,smb_dscnt,this_ldata);        /* dscnt */
  71         SSVAL(cli->outbuf,smb_dsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
  72         SCVAL(cli->outbuf,smb_suwcnt,lsetup);   /* suwcnt */
  73         for (i=0;i<lsetup;i++)          /* setup[] */
  74                 SSVAL(cli->outbuf,smb_setup+i*2,setup[i]);
  75         p = smb_buf(cli->outbuf);
  76         if (trans != SMBtrans) {
  77                 *p++ = 0;  /* put in a null smb_name */
  78                 *p++ = 'D'; *p++ = ' '; /* observed in OS/2 */
  79         }
  80         if (this_lparam)                        /* param[] */
  81                 memcpy(outparam,param,this_lparam);
  82         if (this_ldata)                 /* data[] */
  83                 memcpy(outdata,data,this_ldata);
  84         cli_setup_bcc(cli, outdata+this_ldata);
  85
  86         show_msg(cli->outbuf);
  87         cli_send_smb(cli);
  88
  89         if (this_ldata < ldata || this_lparam < lparam) {
  90                 /* receive interim response */
  91                 if (!cli_receive_smb(cli) ||
  92                     CVAL(cli->inbuf,smb_rcls) != 0) {
  93                         return(False);
  94                 }
  95
  96                 tot_data = this_ldata;
  97                 tot_param = this_lparam;
  98
  99                 while (tot_data < ldata || tot_param < lparam)  {
 100                         this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
 101                         this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
 102
 103                         set_message(cli->outbuf,trans==SMBtrans?8:9,0,True);
 104                         CVAL(cli->outbuf,smb_com) = trans==SMBtrans ? SMBtranss : SMBtranss2;
 105
 106                         outparam = smb_buf(cli->outbuf);
 107                         outdata = outparam+this_lparam;
 108
 109                         /* secondary request */
 110                         SSVAL(cli->outbuf,smb_tpscnt,lparam);   /* tpscnt */
 111                         SSVAL(cli->outbuf,smb_tdscnt,ldata);    /* tdscnt */
 112                         SSVAL(cli->outbuf,smb_spscnt,this_lparam);      /* pscnt */
 113                         SSVAL(cli->outbuf,smb_spsoff,smb_offset(outparam,cli->outbuf)); /* psoff */
 114                         SSVAL(cli->outbuf,smb_spsdisp,tot_param);       /* psdisp */
 115                         SSVAL(cli->outbuf,smb_sdscnt,this_ldata);       /* dscnt */
 116                         SSVAL(cli->outbuf,smb_sdsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
 117                         SSVAL(cli->outbuf,smb_sdsdisp,tot_data);        /* dsdisp */
 118                         if (trans==SMBtrans2)
 119                                 SSVALS(cli->outbuf,smb_sfid,fid);               /* fid */
 120                         if (this_lparam)                        /* param[] */
 121                                 memcpy(outparam,param+tot_param,this_lparam);
 122                         if (this_ldata)                 /* data[] */
 123                                 memcpy(outdata,data+tot_data,this_ldata);
 124                         cli_setup_bcc(cli, outdata+this_ldata);
 125
 126                         show_msg(cli->outbuf);
 127                         cli_send_smb(cli);
 128
 129                         tot_data += this_ldata;
 130                         tot_param += this_lparam;
 131                 }
 132         }
 133
 134         return(True);
 135 }
 136
 137
 138 /****************************************************************************
 139   receive a SMB trans or trans2 response allocating the necessary memory
 140   ****************************************************************************/
 141 BOOL cli_receive_trans(struct cli_state *cli,int trans,
 142                               char **param, int *param_len,
 143                               char **data, int *data_len)
 144 {
 145         int total_data=0;
 146         int total_param=0;
 147         int this_data,this_param;
 148         uint8 eclass;
 149         uint32 ecode;
 150         char *tdata;
 151
 152         *data_len = *param_len = 0;
 153
 154         if (!cli_receive_smb(cli))
 155                 return False;
 156
 157         show_msg(cli->inbuf);
 158
 159         /* sanity check */
 160         if (CVAL(cli->inbuf,smb_com) != trans) {
 161                 DEBUG(0,("Expected %s response, got command 0x%02x\n",
 162                          trans==SMBtrans?"SMBtrans":"SMBtrans2",
 163                          CVAL(cli->inbuf,smb_com)));
 164                 return(False);
 165         }
 166
 167         /*
 168          * An NT RPC pipe call can return ERRDOS, ERRmoredata
 169          * to a trans call. This is not an error and should not
 170          * be treated as such.
 171          */
 172
 173         if (cli_is_dos_error(cli))
 174         {
 175                 cli_dos_error(cli, &eclass, &ecode);
 176
 177                 if(cli->nt_pipe_fnum == 0)
 178                         return(False);
 179
 180                 if(!(eclass == ERRDOS && ecode == ERRmoredata)) {
 181                         if (eclass != 0 && (ecode != (0x80000000 | STATUS_BUFFER_OVERFLOW)))
 182                                 return(False);
 183                 }
 184         }
 185
 186         /* parse out the lengths */
 187         total_data = SVAL(cli->inbuf,smb_tdrcnt);
 188         total_param = SVAL(cli->inbuf,smb_tprcnt);
 189
 190         /* allocate it */
 191         tdata = Realloc(*data,total_data);
 192         if (!tdata) {
 193                 DEBUG(0,("cli_receive_trans: failed to enlarge buffer"));
 194                 return False;
 195         }
 196         else *data = tdata;
 197         tdata = Realloc(*param,total_param);
 198         if (!tdata) {
 199                 DEBUG(0,("cli_receive_trans: failed to enlarge buffer"));
 200                 return False;
 201         }
 202         else *param = tdata;
 203
 204         while (1)  {
 205                 this_data = SVAL(cli->inbuf,smb_drcnt);
 206                 this_param = SVAL(cli->inbuf,smb_prcnt);
 207
 208                 if (this_data + *data_len > total_data ||
 209                     this_param + *param_len > total_param) {
 210                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 211                         return False;
 212                 }
 213
 214                 if (this_data)
 215                         memcpy(*data + SVAL(cli->inbuf,smb_drdisp),
 216                                smb_base(cli->inbuf) + SVAL(cli->inbuf,smb_droff),
 217                                this_data);
 218                 if (this_param)
 219                         memcpy(*param + SVAL(cli->inbuf,smb_prdisp),
 220                                smb_base(cli->inbuf) + SVAL(cli->inbuf,smb_proff),
 221                                this_param);
 222                 *data_len += this_data;
 223                 *param_len += this_param;
 224
 225                 /* parse out the total lengths again - they can shrink! */
 226                 total_data = SVAL(cli->inbuf,smb_tdrcnt);
 227                 total_param = SVAL(cli->inbuf,smb_tprcnt);
 228
 229                 if (total_data <= *data_len && total_param <= *param_len)
 230                         break;
 231
 232                 if (!cli_receive_smb(cli))
 233                         return False;
 234
 235                 show_msg(cli->inbuf);
 236
 237                 /* sanity check */
 238                 if (CVAL(cli->inbuf,smb_com) != trans) {
 239                         DEBUG(0,("Expected %s response, got command 0x%02x\n",
 240                                  trans==SMBtrans?"SMBtrans":"SMBtrans2",
 241                                  CVAL(cli->inbuf,smb_com)));
 242                         return(False);
 243                 }
 244                 if (cli_is_dos_error(cli)) {
 245                         cli_dos_error(cli, &eclass, &ecode);
 246                         if(cli->nt_pipe_fnum == 0 ||
 247                            !(eclass == ERRDOS && ecode == ERRmoredata))
 248                                 return(False);
 249                 }
 250         }
 251
 252         return(True);
 253 }
 254
 255
 256
 257
 258 /****************************************************************************
 259   send a SMB nttrans request
 260   ****************************************************************************/
 261 BOOL cli_send_nt_trans(struct cli_state *cli,
 262                        int function,
 263                        int flags,
 264                        uint16 *setup, int lsetup, int msetup,
 265                        char *param, int lparam, int mparam,
 266                        char *data, int ldata, int mdata)
 267 {
 268         int i;
 269         int this_ldata,this_lparam;
 270         int tot_data=0,tot_param=0;
 271         char *outdata,*outparam;
 272
 273         this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
 274         this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
 275
 276         memset(cli->outbuf,'\0',smb_size);
 277         set_message(cli->outbuf,19+lsetup,0,True);
 278         CVAL(cli->outbuf,smb_com) = SMBnttrans;
 279         SSVAL(cli->outbuf,smb_tid, cli->cnum);
 280         cli_setup_packet(cli);
 281
 282         outparam = smb_buf(cli->outbuf)+3;
 283         outdata = outparam+this_lparam;
 284
 285         /* primary request */
 286         SCVAL(cli->outbuf,smb_nt_MaxSetupCount,msetup);
 287         SCVAL(cli->outbuf,smb_nt_Flags,flags);
 288         SIVAL(cli->outbuf,smb_nt_TotalParameterCount, lparam);
 289         SIVAL(cli->outbuf,smb_nt_TotalDataCount, ldata);
 290         SIVAL(cli->outbuf,smb_nt_MaxParameterCount, mparam);
 291         SIVAL(cli->outbuf,smb_nt_MaxDataCount, mdata);
 292         SIVAL(cli->outbuf,smb_nt_ParameterCount, this_lparam);
 293         SIVAL(cli->outbuf,smb_nt_ParameterOffset, smb_offset(outparam,cli->outbuf));
 294         SIVAL(cli->outbuf,smb_nt_DataCount, this_ldata);
 295         SIVAL(cli->outbuf,smb_nt_DataOffset, smb_offset(outdata,cli->outbuf));
 296         SIVAL(cli->outbuf,smb_nt_SetupCount, lsetup);
 297         SIVAL(cli->outbuf,smb_nt_Function, function);
 298         for (i=0;i<lsetup;i++)          /* setup[] */
 299                 SSVAL(cli->outbuf,smb_nt_SetupStart+i*2,setup[i]);
 300
 301         if (this_lparam)                        /* param[] */
 302                 memcpy(outparam,param,this_lparam);
 303         if (this_ldata)                 /* data[] */
 304                 memcpy(outdata,data,this_ldata);
 305
 306         cli_setup_bcc(cli, outdata+this_ldata);
 307
 308         show_msg(cli->outbuf);
 309         cli_send_smb(cli);
 310
 311         if (this_ldata < ldata || this_lparam < lparam) {
 312                 /* receive interim response */
 313                 if (!cli_receive_smb(cli) ||
 314                     CVAL(cli->inbuf,smb_rcls) != 0) {
 315                         return(False);
 316                 }
 317
 318                 tot_data = this_ldata;
 319                 tot_param = this_lparam;
 320
 321                 while (tot_data < ldata || tot_param < lparam)  {
 322                         this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
 323                         this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
 324
 325                         set_message(cli->outbuf,18,0,True);
 326                         CVAL(cli->outbuf,smb_com) = SMBnttranss;
 327
 328                         /* XXX - these should probably be aligned */
 329                         outparam = smb_buf(cli->outbuf);
 330                         outdata = outparam+this_lparam;
 331
 332                         /* secondary request */
 333                         SIVAL(cli->outbuf,smb_nts_TotalParameterCount,lparam);
 334                         SIVAL(cli->outbuf,smb_nts_TotalDataCount,ldata);
 335                         SIVAL(cli->outbuf,smb_nts_ParameterCount,this_lparam);
 336                         SIVAL(cli->outbuf,smb_nts_ParameterOffset,smb_offset(outparam,cli->outbuf));
 337                         SIVAL(cli->outbuf,smb_nts_ParameterDisplacement,tot_param);
 338                         SIVAL(cli->outbuf,smb_nts_DataCount,this_ldata);
 339                         SIVAL(cli->outbuf,smb_nts_DataOffset,smb_offset(outdata,cli->outbuf));
 340                         SIVAL(cli->outbuf,smb_nts_DataDisplacement,tot_data);
 341                         if (this_lparam)                        /* param[] */
 342                                 memcpy(outparam,param+tot_param,this_lparam);
 343                         if (this_ldata)                 /* data[] */
 344                                 memcpy(outdata,data+tot_data,this_ldata);
 345                         cli_setup_bcc(cli, outdata+this_ldata);
 346
 347                         show_msg(cli->outbuf);
 348                         cli_send_smb(cli);
 349
 350                         tot_data += this_ldata;
 351                         tot_param += this_lparam;
 352                 }
 353         }
 354
 355         return(True);
 356 }
 357
 358
 359
 360 /****************************************************************************
 361   receive a SMB nttrans response allocating the necessary memory
 362   ****************************************************************************/
 363 BOOL cli_receive_nt_trans(struct cli_state *cli,
 364                           char **param, int *param_len,
 365                           char **data, int *data_len)
 366 {
 367         int total_data=0;
 368         int total_param=0;
 369         int this_data,this_param;
 370         uint8 eclass;
 371         uint32 ecode;
 372         char *tdata;
 373
 374         *data_len = *param_len = 0;
 375
 376         if (!cli_receive_smb(cli))
 377                 return False;
 378
 379         show_msg(cli->inbuf);
 380
 381         /* sanity check */
 382         if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 383                 DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 384                          CVAL(cli->inbuf,smb_com)));
 385                 return(False);
 386         }
 387
 388         /*
 389          * An NT RPC pipe call can return ERRDOS, ERRmoredata
 390          * to a trans call. This is not an error and should not
 391          * be treated as such.
 392          */
 393         if (cli_is_dos_error(cli)) {
 394                 cli_dos_error(cli, &eclass, &ecode);
 395                 if (cli->nt_pipe_fnum == 0 || !(eclass == ERRDOS && ecode == ERRmoredata))
 396                         return(False);
 397         }
 398
 399         /* parse out the lengths */
 400         total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 401         total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 402
 403         /* allocate it */
 404         tdata = Realloc(*data,total_data);
 405         if (!tdata) {
 406                 DEBUG(0,("cli_receive_nt_trans: failed to enlarge buffer"));
 407                 return False;
 408         }
 409         else *data = tdata;
 410         tdata = Realloc(*param,total_param);
 411         if (!tdata) {
 412                 DEBUG(0,("cli_receive_nt_trans: failed to enlarge buffer"));
 413                 return False;
 414         }
 415         else *param = tdata;
 416
 417         while (1)  {
 418                 this_data = SVAL(cli->inbuf,smb_ntr_DataCount);
 419                 this_param = SVAL(cli->inbuf,smb_ntr_ParameterCount);
 420
 421                 if (this_data + *data_len > total_data ||
 422                     this_param + *param_len > total_param) {
 423                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 424                         return False;
 425                 }
 426
 427                 if (this_data)
 428                         memcpy(*data + SVAL(cli->inbuf,smb_ntr_DataDisplacement),
 429                                smb_base(cli->inbuf) + SVAL(cli->inbuf,smb_ntr_DataOffset),
 430                                this_data);
 431                 if (this_param)
 432                         memcpy(*param + SVAL(cli->inbuf,smb_ntr_ParameterDisplacement),
 433                                smb_base(cli->inbuf) + SVAL(cli->inbuf,smb_ntr_ParameterOffset),
 434                                this_param);
 435                 *data_len += this_data;
 436                 *param_len += this_param;
 437
 438                 /* parse out the total lengths again - they can shrink! */
 439                 total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 440                 total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 441
 442                 if (total_data <= *data_len && total_param <= *param_len)
 443                         break;
 444
 445                 if (!cli_receive_smb(cli))
 446                         return False;
 447
 448                 show_msg(cli->inbuf);
 449
 450                 /* sanity check */
 451                 if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 452                         DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 453                                  CVAL(cli->inbuf,smb_com)));
 454                         return(False);
 455                 }
 456                 if (cli_is_dos_error(cli)) {
 457                         cli_dos_error(cli, &eclass, &ecode);
 458                         if(cli->nt_pipe_fnum == 0 ||
 459                            !(eclass == ERRDOS && ecode == ERRmoredata))
 460                                 return(False);
 461                 }
 462         }
 463
 464         return(True);
 465 }