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         SCVAL(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|STR_CONVERT);
  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                     cli_is_error(cli)) {
  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                         SCVAL(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         NTSTATUS status;
 149         char *tdata;
 150         char *tparam;
 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         status = cli_nt_error(cli);
 173
 174         if (NT_STATUS_IS_ERR(status)) {
 175                 return False;
 176         }
 177
 178         /* parse out the lengths */
 179         total_data = SVAL(cli->inbuf,smb_tdrcnt);
 180         total_param = SVAL(cli->inbuf,smb_tprcnt);
 181
 182         /* allocate it */
 183         if (total_data!=0) {
 184                 tdata = Realloc(*data,total_data);
 185                 if (!tdata) {
 186                         DEBUG(0,("cli_receive_trans: failed to enlarge data buffer\n"));
 187                         return False;
 188                 }
 189                 else
 190                         *data = tdata;
 191         }
 192
 193         if (total_param!=0) {
 194                 tparam = Realloc(*param,total_param);
 195                 if (!tparam) {
 196                         DEBUG(0,("cli_receive_trans: failed to enlarge param buffer\n"));
 197                         return False;
 198                 }
 199                 else
 200                         *param = tparam;
 201         }
 202
 203         while (1)  {
 204                 this_data = SVAL(cli->inbuf,smb_drcnt);
 205                 this_param = SVAL(cli->inbuf,smb_prcnt);
 206
 207                 if (this_data + *data_len > total_data ||
 208                     this_param + *param_len > total_param) {
 209                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 210                         return False;
 211                 }
 212
 213                 if (this_data)
 214                         memcpy(*data + SVAL(cli->inbuf,smb_drdisp),
 215                                smb_base(cli->inbuf) + SVAL(cli->inbuf,smb_droff),
 216                                this_data);
 217                 if (this_param)
 218                         memcpy(*param + SVAL(cli->inbuf,smb_prdisp),
 219                                smb_base(cli->inbuf) + SVAL(cli->inbuf,smb_proff),
 220                                this_param);
 221                 *data_len += this_data;
 222                 *param_len += this_param;
 223
 224                 /* parse out the total lengths again - they can shrink! */
 225                 total_data = SVAL(cli->inbuf,smb_tdrcnt);
 226                 total_param = SVAL(cli->inbuf,smb_tprcnt);
 227
 228                 if (total_data <= *data_len && total_param <= *param_len)
 229                         break;
 230
 231                 if (!cli_receive_smb(cli))
 232                         return False;
 233
 234                 show_msg(cli->inbuf);
 235
 236                 /* sanity check */
 237                 if (CVAL(cli->inbuf,smb_com) != trans) {
 238                         DEBUG(0,("Expected %s response, got command 0x%02x\n",
 239                                  trans==SMBtrans?"SMBtrans":"SMBtrans2",
 240                                  CVAL(cli->inbuf,smb_com)));
 241                         return(False);
 242                 }
 243                 if (NT_STATUS_IS_ERR(cli_nt_error(cli))) {
 244                         return(False);
 245                 }
 246         }
 247
 248         return(True);
 249 }
 250
 251
 252
 253
 254 /****************************************************************************
 255   send a SMB nttrans request
 256   ****************************************************************************/
 257 BOOL cli_send_nt_trans(struct cli_state *cli,
 258                        int function,
 259                        int flags,
 260                        uint16 *setup, int lsetup, int msetup,
 261                        char *param, int lparam, int mparam,
 262                        char *data, int ldata, int mdata)
 263 {
 264         int i;
 265         int this_ldata,this_lparam;
 266         int tot_data=0,tot_param=0;
 267         char *outdata,*outparam;
 268
 269         this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
 270         this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
 271
 272         memset(cli->outbuf,'\0',smb_size);
 273         set_message(cli->outbuf,19+lsetup,0,True);
 274         SCVAL(cli->outbuf,smb_com,SMBnttrans);
 275         SSVAL(cli->outbuf,smb_tid, cli->cnum);
 276         cli_setup_packet(cli);
 277
 278         outparam = smb_buf(cli->outbuf)+3;
 279         outdata = outparam+this_lparam;
 280
 281         /* primary request */
 282         SCVAL(cli->outbuf,smb_nt_MaxSetupCount,msetup);
 283         SCVAL(cli->outbuf,smb_nt_Flags,flags);
 284         SIVAL(cli->outbuf,smb_nt_TotalParameterCount, lparam);
 285         SIVAL(cli->outbuf,smb_nt_TotalDataCount, ldata);
 286         SIVAL(cli->outbuf,smb_nt_MaxParameterCount, mparam);
 287         SIVAL(cli->outbuf,smb_nt_MaxDataCount, mdata);
 288         SIVAL(cli->outbuf,smb_nt_ParameterCount, this_lparam);
 289         SIVAL(cli->outbuf,smb_nt_ParameterOffset, smb_offset(outparam,cli->outbuf));
 290         SIVAL(cli->outbuf,smb_nt_DataCount, this_ldata);
 291         SIVAL(cli->outbuf,smb_nt_DataOffset, smb_offset(outdata,cli->outbuf));
 292         SIVAL(cli->outbuf,smb_nt_SetupCount, lsetup);
 293         SIVAL(cli->outbuf,smb_nt_Function, function);
 294         for (i=0;i<lsetup;i++)          /* setup[] */
 295                 SSVAL(cli->outbuf,smb_nt_SetupStart+i*2,setup[i]);
 296
 297         if (this_lparam)                        /* param[] */
 298                 memcpy(outparam,param,this_lparam);
 299         if (this_ldata)                 /* data[] */
 300                 memcpy(outdata,data,this_ldata);
 301
 302         cli_setup_bcc(cli, outdata+this_ldata);
 303
 304         show_msg(cli->outbuf);
 305         cli_send_smb(cli);
 306
 307         if (this_ldata < ldata || this_lparam < lparam) {
 308                 /* receive interim response */
 309                 if (!cli_receive_smb(cli) ||
 310                     cli_is_error(cli)) {
 311                         return(False);
 312                 }
 313
 314                 tot_data = this_ldata;
 315                 tot_param = this_lparam;
 316
 317                 while (tot_data < ldata || tot_param < lparam)  {
 318                         this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
 319                         this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
 320
 321                         set_message(cli->outbuf,18,0,True);
 322                         SCVAL(cli->outbuf,smb_com,SMBnttranss);
 323
 324                         /* XXX - these should probably be aligned */
 325                         outparam = smb_buf(cli->outbuf);
 326                         outdata = outparam+this_lparam;
 327
 328                         /* secondary request */
 329                         SIVAL(cli->outbuf,smb_nts_TotalParameterCount,lparam);
 330                         SIVAL(cli->outbuf,smb_nts_TotalDataCount,ldata);
 331                         SIVAL(cli->outbuf,smb_nts_ParameterCount,this_lparam);
 332                         SIVAL(cli->outbuf,smb_nts_ParameterOffset,smb_offset(outparam,cli->outbuf));
 333                         SIVAL(cli->outbuf,smb_nts_ParameterDisplacement,tot_param);
 334                         SIVAL(cli->outbuf,smb_nts_DataCount,this_ldata);
 335                         SIVAL(cli->outbuf,smb_nts_DataOffset,smb_offset(outdata,cli->outbuf));
 336                         SIVAL(cli->outbuf,smb_nts_DataDisplacement,tot_data);
 337                         if (this_lparam)                        /* param[] */
 338                                 memcpy(outparam,param+tot_param,this_lparam);
 339                         if (this_ldata)                 /* data[] */
 340                                 memcpy(outdata,data+tot_data,this_ldata);
 341                         cli_setup_bcc(cli, outdata+this_ldata);
 342
 343                         show_msg(cli->outbuf);
 344                         cli_send_smb(cli);
 345
 346                         tot_data += this_ldata;
 347                         tot_param += this_lparam;
 348                 }
 349         }
 350
 351         return(True);
 352 }
 353
 354
 355
 356 /****************************************************************************
 357   receive a SMB nttrans response allocating the necessary memory
 358   ****************************************************************************/
 359 BOOL cli_receive_nt_trans(struct cli_state *cli,
 360                           char **param, int *param_len,
 361                           char **data, int *data_len)
 362 {
 363         int total_data=0;
 364         int total_param=0;
 365         int this_data,this_param;
 366         uint8 eclass;
 367         uint32 ecode;
 368         char *tdata;
 369         char *tparam;
 370
 371         *data_len = *param_len = 0;
 372
 373         if (!cli_receive_smb(cli))
 374                 return False;
 375
 376         show_msg(cli->inbuf);
 377
 378         /* sanity check */
 379         if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 380                 DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 381                          CVAL(cli->inbuf,smb_com)));
 382                 return(False);
 383         }
 384
 385         /*
 386          * An NT RPC pipe call can return ERRDOS, ERRmoredata
 387          * to a trans call. This is not an error and should not
 388          * be treated as such.
 389          */
 390         if (cli_is_dos_error(cli)) {
 391                 cli_dos_error(cli, &eclass, &ecode);
 392                 if (cli->nt_pipe_fnum == 0 || !(eclass == ERRDOS && ecode == ERRmoredata))
 393                         return(False);
 394         }
 395
 396         /* parse out the lengths */
 397         total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 398         total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 399
 400         /* allocate it */
 401         if (total_data) {
 402                 tdata = Realloc(*data,total_data);
 403                 if (!tdata) {
 404                         DEBUG(0,("cli_receive_nt_trans: failed to enlarge data buffer to %d\n",total_data));
 405                         return False;
 406                 } else {
 407                         *data = tdata;
 408                 }
 409         }
 410
 411         if (total_param) {
 412                 tparam = Realloc(*param,total_param);
 413                 if (!tparam) {
 414                         DEBUG(0,("cli_receive_nt_trans: failed to enlarge param buffer to %d\n", total_param));
 415                         return False;
 416                 } else {
 417                         *param = tparam;
 418                 }
 419         }
 420
 421         while (1)  {
 422                 this_data = SVAL(cli->inbuf,smb_ntr_DataCount);
 423                 this_param = SVAL(cli->inbuf,smb_ntr_ParameterCount);
 424
 425                 if (this_data + *data_len > total_data ||
 426                     this_param + *param_len > total_param) {
 427                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 428                         return False;
 429                 }
 430
 431                 if (this_data)
 432                         memcpy(*data + SVAL(cli->inbuf,smb_ntr_DataDisplacement),
 433                                smb_base(cli->inbuf) + SVAL(cli->inbuf,smb_ntr_DataOffset),
 434                                this_data);
 435                 if (this_param)
 436                         memcpy(*param + SVAL(cli->inbuf,smb_ntr_ParameterDisplacement),
 437                                smb_base(cli->inbuf) + SVAL(cli->inbuf,smb_ntr_ParameterOffset),
 438                                this_param);
 439                 *data_len += this_data;
 440                 *param_len += this_param;
 441
 442                 /* parse out the total lengths again - they can shrink! */
 443                 total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 444                 total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 445
 446                 if (total_data <= *data_len && total_param <= *param_len)
 447                         break;
 448
 449                 if (!cli_receive_smb(cli))
 450                         return False;
 451
 452                 show_msg(cli->inbuf);
 453
 454                 /* sanity check */
 455                 if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 456                         DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 457                                  CVAL(cli->inbuf,smb_com)));
 458                         return(False);
 459                 }
 460                 if (cli_is_dos_error(cli)) {
 461                         cli_dos_error(cli, &eclass, &ecode);
 462                         if(cli->nt_pipe_fnum == 0 ||
 463                            !(eclass == ERRDOS && ecode == ERRmoredata))
 464                                 return(False);
 465                 }
 466         }
 467
 468         return(True);
 469 }