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 #define NO_SYSLOG
  22
  23 #include "includes.h"
  24
  25
  26 /****************************************************************************
  27   send a SMB trans or trans2 request
  28   ****************************************************************************/
  29 BOOL cli_send_trans(struct cli_state *cli, int trans,
  30                     const char *pipe_name,
  31                     int fid, int flags,
  32                     uint16 *setup, int lsetup, int msetup,
  33                     char *param, int lparam, int mparam,
  34                     char *data, int ldata, int mdata)
  35 {
  36         int i;
  37         int this_ldata,this_lparam;
  38         int tot_data=0,tot_param=0;
  39         char *outdata,*outparam;
  40         char *p;
  41         int pipe_name_len=0;
  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         if (pipe_name) {
  53                 pipe_name_len = clistr_push(cli, smb_buf(cli->outbuf), pipe_name, -1, STR_TERMINATE);
  54         }
  55
  56         outparam = smb_buf(cli->outbuf)+(trans==SMBtrans ? pipe_name_len : 3);
  57         outdata = outparam+this_lparam;
  58
  59         /* primary request */
  60         SSVAL(cli->outbuf,smb_tpscnt,lparam);   /* tpscnt */
  61         SSVAL(cli->outbuf,smb_tdscnt,ldata);    /* tdscnt */
  62         SSVAL(cli->outbuf,smb_mprcnt,mparam);   /* mprcnt */
  63         SSVAL(cli->outbuf,smb_mdrcnt,mdata);    /* mdrcnt */
  64         SCVAL(cli->outbuf,smb_msrcnt,msetup);   /* msrcnt */
  65         SSVAL(cli->outbuf,smb_flags,flags);     /* flags */
  66         SIVAL(cli->outbuf,smb_timeout,0);               /* timeout */
  67         SSVAL(cli->outbuf,smb_pscnt,this_lparam);       /* pscnt */
  68         SSVAL(cli->outbuf,smb_psoff,smb_offset(outparam,cli->outbuf)); /* psoff */
  69         SSVAL(cli->outbuf,smb_dscnt,this_ldata);        /* dscnt */
  70         SSVAL(cli->outbuf,smb_dsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
  71         SCVAL(cli->outbuf,smb_suwcnt,lsetup);   /* suwcnt */
  72         for (i=0;i<lsetup;i++)          /* setup[] */
  73                 SSVAL(cli->outbuf,smb_setup+i*2,setup[i]);
  74         p = smb_buf(cli->outbuf);
  75         if (trans != SMBtrans) {
  76                 *p++ = 0;  /* put in a null smb_name */
  77                 *p++ = 'D'; *p++ = ' '; /* observed in OS/2 */
  78         }
  79         if (this_lparam)                        /* param[] */
  80                 memcpy(outparam,param,this_lparam);
  81         if (this_ldata)                 /* data[] */
  82                 memcpy(outdata,data,this_ldata);
  83         cli_setup_bcc(cli, outdata+this_ldata);
  84
  85         show_msg(cli->outbuf);
  86         cli_send_smb(cli);
  87
  88         if (this_ldata < ldata || this_lparam < lparam) {
  89                 /* receive interim response */
  90                 if (!cli_receive_smb(cli) ||
  91                     cli_is_error(cli)) {
  92                         return(False);
  93                 }
  94
  95                 tot_data = this_ldata;
  96                 tot_param = this_lparam;
  97
  98                 while (tot_data < ldata || tot_param < lparam)  {
  99                         this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
 100                         this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
 101
 102                         set_message(cli->outbuf,trans==SMBtrans?8:9,0,True);
 103                         SCVAL(cli->outbuf,smb_com,(trans==SMBtrans ? SMBtranss : SMBtranss2));
 104
 105                         outparam = smb_buf(cli->outbuf);
 106                         outdata = outparam+this_lparam;
 107
 108                         /* secondary request */
 109                         SSVAL(cli->outbuf,smb_tpscnt,lparam);   /* tpscnt */
 110                         SSVAL(cli->outbuf,smb_tdscnt,ldata);    /* tdscnt */
 111                         SSVAL(cli->outbuf,smb_spscnt,this_lparam);      /* pscnt */
 112                         SSVAL(cli->outbuf,smb_spsoff,smb_offset(outparam,cli->outbuf)); /* psoff */
 113                         SSVAL(cli->outbuf,smb_spsdisp,tot_param);       /* psdisp */
 114                         SSVAL(cli->outbuf,smb_sdscnt,this_ldata);       /* dscnt */
 115                         SSVAL(cli->outbuf,smb_sdsoff,smb_offset(outdata,cli->outbuf)); /* dsoff */
 116                         SSVAL(cli->outbuf,smb_sdsdisp,tot_data);        /* dsdisp */
 117                         if (trans==SMBtrans2)
 118                                 SSVALS(cli->outbuf,smb_sfid,fid);               /* fid */
 119                         if (this_lparam)                        /* param[] */
 120                                 memcpy(outparam,param+tot_param,this_lparam);
 121                         if (this_ldata)                 /* data[] */
 122                                 memcpy(outdata,data+tot_data,this_ldata);
 123                         cli_setup_bcc(cli, outdata+this_ldata);
 124
 125                         show_msg(cli->outbuf);
 126                         cli_send_smb(cli);
 127
 128                         tot_data += this_ldata;
 129                         tot_param += this_lparam;
 130                 }
 131         }
 132
 133         return(True);
 134 }
 135
 136
 137 /****************************************************************************
 138   receive a SMB trans or trans2 response allocating the necessary memory
 139   ****************************************************************************/
 140 BOOL cli_receive_trans(struct cli_state *cli,int trans,
 141                               char **param, int *param_len,
 142                               char **data, int *data_len)
 143 {
 144         int total_data=0;
 145         int total_param=0;
 146         int this_data,this_param;
 147         NTSTATUS status;
 148         char *tdata;
 149         char *tparam;
 150
 151         *data_len = *param_len = 0;
 152
 153         if (!cli_receive_smb(cli))
 154                 return False;
 155
 156         show_msg(cli->inbuf);
 157
 158         /* sanity check */
 159         if (CVAL(cli->inbuf,smb_com) != trans) {
 160                 DEBUG(0,("Expected %s response, got command 0x%02x\n",
 161                          trans==SMBtrans?"SMBtrans":"SMBtrans2",
 162                          CVAL(cli->inbuf,smb_com)));
 163                 return(False);
 164         }
 165
 166         /*
 167          * An NT RPC pipe call can return ERRDOS, ERRmoredata
 168          * to a trans call. This is not an error and should not
 169          * be treated as such.
 170          */
 171         status = cli_nt_error(cli);
 172
 173         if (NT_STATUS_IS_ERR(status)) {
 174                 return False;
 175         }
 176
 177         /* parse out the lengths */
 178         total_data = SVAL(cli->inbuf,smb_tdrcnt);
 179         total_param = SVAL(cli->inbuf,smb_tprcnt);
 180
 181         /* allocate it */
 182         if (total_data!=0) {
 183                 tdata = Realloc(*data,total_data);
 184                 if (!tdata) {
 185                         DEBUG(0,("cli_receive_trans: failed to enlarge data buffer\n"));
 186                         return False;
 187                 }
 188                 else
 189                         *data = tdata;
 190         }
 191
 192         if (total_param!=0) {
 193                 tparam = Realloc(*param,total_param);
 194                 if (!tparam) {
 195                         DEBUG(0,("cli_receive_trans: failed to enlarge param buffer\n"));
 196                         return False;
 197                 }
 198                 else
 199                         *param = tparam;
 200         }
 201
 202         while (1)  {
 203                 this_data = SVAL(cli->inbuf,smb_drcnt);
 204                 this_param = SVAL(cli->inbuf,smb_prcnt);
 205
 206                 if (this_data + *data_len > total_data ||
 207                     this_param + *param_len > total_param) {
 208                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 209                         return False;
 210                 }
 211
 212                 if (this_data)
 213                         memcpy(*data + SVAL(cli->inbuf,smb_drdisp),
 214                                smb_base(cli->inbuf) + SVAL(cli->inbuf,smb_droff),
 215                                this_data);
 216                 if (this_param)
 217                         memcpy(*param + SVAL(cli->inbuf,smb_prdisp),
 218                                smb_base(cli->inbuf) + SVAL(cli->inbuf,smb_proff),
 219                                this_param);
 220                 *data_len += this_data;
 221                 *param_len += this_param;
 222
 223                 /* parse out the total lengths again - they can shrink! */
 224                 total_data = SVAL(cli->inbuf,smb_tdrcnt);
 225                 total_param = SVAL(cli->inbuf,smb_tprcnt);
 226
 227                 if (total_data <= *data_len && total_param <= *param_len)
 228                         break;
 229
 230                 if (!cli_receive_smb(cli))
 231                         return False;
 232
 233                 show_msg(cli->inbuf);
 234
 235                 /* sanity check */
 236                 if (CVAL(cli->inbuf,smb_com) != trans) {
 237                         DEBUG(0,("Expected %s response, got command 0x%02x\n",
 238                                  trans==SMBtrans?"SMBtrans":"SMBtrans2",
 239                                  CVAL(cli->inbuf,smb_com)));
 240                         return(False);
 241                 }
 242                 if (NT_STATUS_IS_ERR(cli_nt_error(cli))) {
 243                         return(False);
 244                 }
 245         }
 246
 247         return(True);
 248 }
 249
 250
 251
 252
 253 /****************************************************************************
 254   send a SMB nttrans request
 255   ****************************************************************************/
 256 BOOL cli_send_nt_trans(struct cli_state *cli,
 257                        int function,
 258                        int flags,
 259                        uint16 *setup, int lsetup, int msetup,
 260                        char *param, int lparam, int mparam,
 261                        char *data, int ldata, int mdata)
 262 {
 263         int i;
 264         int this_ldata,this_lparam;
 265         int tot_data=0,tot_param=0;
 266         char *outdata,*outparam;
 267
 268         this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
 269         this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
 270
 271         memset(cli->outbuf,'\0',smb_size);
 272         set_message(cli->outbuf,19+lsetup,0,True);
 273         SCVAL(cli->outbuf,smb_com,SMBnttrans);
 274         SSVAL(cli->outbuf,smb_tid, cli->cnum);
 275         cli_setup_packet(cli);
 276
 277         outparam = smb_buf(cli->outbuf)+3;
 278         outdata = outparam+this_lparam;
 279
 280         /* primary request */
 281         SCVAL(cli->outbuf,smb_nt_MaxSetupCount,msetup);
 282         SCVAL(cli->outbuf,smb_nt_Flags,flags);
 283         SIVAL(cli->outbuf,smb_nt_TotalParameterCount, lparam);
 284         SIVAL(cli->outbuf,smb_nt_TotalDataCount, ldata);
 285         SIVAL(cli->outbuf,smb_nt_MaxParameterCount, mparam);
 286         SIVAL(cli->outbuf,smb_nt_MaxDataCount, mdata);
 287         SIVAL(cli->outbuf,smb_nt_ParameterCount, this_lparam);
 288         SIVAL(cli->outbuf,smb_nt_ParameterOffset, smb_offset(outparam,cli->outbuf));
 289         SIVAL(cli->outbuf,smb_nt_DataCount, this_ldata);
 290         SIVAL(cli->outbuf,smb_nt_DataOffset, smb_offset(outdata,cli->outbuf));
 291         SIVAL(cli->outbuf,smb_nt_SetupCount, lsetup);
 292         SIVAL(cli->outbuf,smb_nt_Function, function);
 293         for (i=0;i<lsetup;i++)          /* setup[] */
 294                 SSVAL(cli->outbuf,smb_nt_SetupStart+i*2,setup[i]);
 295
 296         if (this_lparam)                        /* param[] */
 297                 memcpy(outparam,param,this_lparam);
 298         if (this_ldata)                 /* data[] */
 299                 memcpy(outdata,data,this_ldata);
 300
 301         cli_setup_bcc(cli, outdata+this_ldata);
 302
 303         show_msg(cli->outbuf);
 304         cli_send_smb(cli);
 305
 306         if (this_ldata < ldata || this_lparam < lparam) {
 307                 /* receive interim response */
 308                 if (!cli_receive_smb(cli) ||
 309                     cli_is_error(cli)) {
 310                         return(False);
 311                 }
 312
 313                 tot_data = this_ldata;
 314                 tot_param = this_lparam;
 315
 316                 while (tot_data < ldata || tot_param < lparam)  {
 317                         this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
 318                         this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
 319
 320                         set_message(cli->outbuf,18,0,True);
 321                         SCVAL(cli->outbuf,smb_com,SMBnttranss);
 322
 323                         /* XXX - these should probably be aligned */
 324                         outparam = smb_buf(cli->outbuf);
 325                         outdata = outparam+this_lparam;
 326
 327                         /* secondary request */
 328                         SIVAL(cli->outbuf,smb_nts_TotalParameterCount,lparam);
 329                         SIVAL(cli->outbuf,smb_nts_TotalDataCount,ldata);
 330                         SIVAL(cli->outbuf,smb_nts_ParameterCount,this_lparam);
 331                         SIVAL(cli->outbuf,smb_nts_ParameterOffset,smb_offset(outparam,cli->outbuf));
 332                         SIVAL(cli->outbuf,smb_nts_ParameterDisplacement,tot_param);
 333                         SIVAL(cli->outbuf,smb_nts_DataCount,this_ldata);
 334                         SIVAL(cli->outbuf,smb_nts_DataOffset,smb_offset(outdata,cli->outbuf));
 335                         SIVAL(cli->outbuf,smb_nts_DataDisplacement,tot_data);
 336                         if (this_lparam)                        /* param[] */
 337                                 memcpy(outparam,param+tot_param,this_lparam);
 338                         if (this_ldata)                 /* data[] */
 339                                 memcpy(outdata,data+tot_data,this_ldata);
 340                         cli_setup_bcc(cli, outdata+this_ldata);
 341
 342                         show_msg(cli->outbuf);
 343                         cli_send_smb(cli);
 344
 345                         tot_data += this_ldata;
 346                         tot_param += this_lparam;
 347                 }
 348         }
 349
 350         return(True);
 351 }
 352
 353
 354
 355 /****************************************************************************
 356   receive a SMB nttrans response allocating the necessary memory
 357   ****************************************************************************/
 358 BOOL cli_receive_nt_trans(struct cli_state *cli,
 359                           char **param, int *param_len,
 360                           char **data, int *data_len)
 361 {
 362         int total_data=0;
 363         int total_param=0;
 364         int this_data,this_param;
 365         uint8 eclass;
 366         uint32 ecode;
 367         char *tdata;
 368         char *tparam;
 369
 370         *data_len = *param_len = 0;
 371
 372         if (!cli_receive_smb(cli))
 373                 return False;
 374
 375         show_msg(cli->inbuf);
 376
 377         /* sanity check */
 378         if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 379                 DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 380                          CVAL(cli->inbuf,smb_com)));
 381                 return(False);
 382         }
 383
 384         /*
 385          * An NT RPC pipe call can return ERRDOS, ERRmoredata
 386          * to a trans call. This is not an error and should not
 387          * be treated as such.
 388          */
 389         if (cli_is_dos_error(cli)) {
 390                 cli_dos_error(cli, &eclass, &ecode);
 391                 if (cli->nt_pipe_fnum == 0 || !(eclass == ERRDOS && ecode == ERRmoredata))
 392                         return(False);
 393         }
 394
 395         /* parse out the lengths */
 396         total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 397         total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 398
 399         /* allocate it */
 400         if (total_data) {
 401                 tdata = Realloc(*data,total_data);
 402                 if (!tdata) {
 403                         DEBUG(0,("cli_receive_nt_trans: failed to enlarge data buffer to %d\n",total_data));
 404                         return False;
 405                 } else {
 406                         *data = tdata;
 407                 }
 408         }
 409
 410         if (total_param) {
 411                 tparam = Realloc(*param,total_param);
 412                 if (!tparam) {
 413                         DEBUG(0,("cli_receive_nt_trans: failed to enlarge param buffer to %d\n", total_param));
 414                         return False;
 415                 } else {
 416                         *param = tparam;
 417                 }
 418         }
 419
 420         while (1)  {
 421                 this_data = SVAL(cli->inbuf,smb_ntr_DataCount);
 422                 this_param = SVAL(cli->inbuf,smb_ntr_ParameterCount);
 423
 424                 if (this_data + *data_len > total_data ||
 425                     this_param + *param_len > total_param) {
 426                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 427                         return False;
 428                 }
 429
 430                 if (this_data)
 431                         memcpy(*data + SVAL(cli->inbuf,smb_ntr_DataDisplacement),
 432                                smb_base(cli->inbuf) + SVAL(cli->inbuf,smb_ntr_DataOffset),
 433                                this_data);
 434                 if (this_param)
 435                         memcpy(*param + SVAL(cli->inbuf,smb_ntr_ParameterDisplacement),
 436                                smb_base(cli->inbuf) + SVAL(cli->inbuf,smb_ntr_ParameterOffset),
 437                                this_param);
 438                 *data_len += this_data;
 439                 *param_len += this_param;
 440
 441                 /* parse out the total lengths again - they can shrink! */
 442                 total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 443                 total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 444
 445                 if (total_data <= *data_len && total_param <= *param_len)
 446                         break;
 447
 448                 if (!cli_receive_smb(cli))
 449                         return False;
 450
 451                 show_msg(cli->inbuf);
 452
 453                 /* sanity check */
 454                 if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 455                         DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 456                                  CVAL(cli->inbuf,smb_com)));
 457                         return(False);
 458                 }
 459                 if (cli_is_dos_error(cli)) {
 460                         cli_dos_error(cli, &eclass, &ecode);
 461                         if(cli->nt_pipe_fnum == 0 ||
 462                            !(eclass == ERRDOS && ecode == ERRmoredata))
 463                                 return(False);
 464                 }
 465         }
 466
 467         return(True);
 468 }