source3/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
 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
 172         if (cli_error(cli, &eclass, &ecode, NULL))
 173         {
 174         if(cli->nt_pipe_fnum == 0)
 175                         return(False);
 176
 177         if(!(eclass == ERRDOS && ecode == ERRmoredata)) {
 178                         if (eclass != 0 && (ecode != (0x80000000 | STATUS_BUFFER_OVERFLOW)))
 179                                 return(False);
 180                 }
 181         }
 182
 183         /* parse out the lengths */
 184         total_data = SVAL(cli->inbuf,smb_tdrcnt);
 185         total_param = SVAL(cli->inbuf,smb_tprcnt);
 186
 187         /* allocate it */
 188         *data = Realloc(*data,total_data);
 189         *param = Realloc(*param,total_param);
 190
 191         while (1)  {
 192                 this_data = SVAL(cli->inbuf,smb_drcnt);
 193                 this_param = SVAL(cli->inbuf,smb_prcnt);
 194
 195                 if (this_data + *data_len > total_data ||
 196                     this_param + *param_len > total_param) {
 197                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 198                         return False;
 199                 }
 200
 201                 if (this_data)
 202                         memcpy(*data + SVAL(cli->inbuf,smb_drdisp),
 203                                smb_base(cli->inbuf) + SVAL(cli->inbuf,smb_droff),
 204                                this_data);
 205                 if (this_param)
 206                         memcpy(*param + SVAL(cli->inbuf,smb_prdisp),
 207                                smb_base(cli->inbuf) + SVAL(cli->inbuf,smb_proff),
 208                                this_param);
 209                 *data_len += this_data;
 210                 *param_len += this_param;
 211
 212                 /* parse out the total lengths again - they can shrink! */
 213                 total_data = SVAL(cli->inbuf,smb_tdrcnt);
 214                 total_param = SVAL(cli->inbuf,smb_tprcnt);
 215
 216                 if (total_data <= *data_len && total_param <= *param_len)
 217                         break;
 218
 219                 if (!cli_receive_smb(cli))
 220                         return False;
 221
 222                 show_msg(cli->inbuf);
 223
 224                 /* sanity check */
 225                 if (CVAL(cli->inbuf,smb_com) != trans) {
 226                         DEBUG(0,("Expected %s response, got command 0x%02x\n",
 227                                  trans==SMBtrans?"SMBtrans":"SMBtrans2",
 228                                  CVAL(cli->inbuf,smb_com)));
 229                         return(False);
 230                 }
 231                 if (cli_error(cli, &eclass, &ecode, NULL))
 232                 {
 233                 if(cli->nt_pipe_fnum == 0 || !(eclass == ERRDOS && ecode == ERRmoredata))
 234                                 return(False);
 235                 }
 236         }
 237
 238         return(True);
 239 }
 240
 241
 242
 243
 244 /****************************************************************************
 245   send a SMB nttrans request
 246   ****************************************************************************/
 247 BOOL cli_send_nt_trans(struct cli_state *cli,
 248                        int function,
 249                        int flags,
 250                        uint16 *setup, int lsetup, int msetup,
 251                        char *param, int lparam, int mparam,
 252                        char *data, int ldata, int mdata)
 253 {
 254         int i;
 255         int this_ldata,this_lparam;
 256         int tot_data=0,tot_param=0;
 257         char *outdata,*outparam;
 258
 259         this_lparam = MIN(lparam,cli->max_xmit - (500+lsetup*2)); /* hack */
 260         this_ldata = MIN(ldata,cli->max_xmit - (500+lsetup*2+this_lparam));
 261
 262         memset(cli->outbuf,'\0',smb_size);
 263         set_message(cli->outbuf,19+lsetup,0,True);
 264         CVAL(cli->outbuf,smb_com) = SMBnttrans;
 265         SSVAL(cli->outbuf,smb_tid, cli->cnum);
 266         cli_setup_packet(cli);
 267
 268         outparam = smb_buf(cli->outbuf)+3;
 269         outdata = outparam+this_lparam;
 270
 271         /* primary request */
 272         SCVAL(cli->outbuf,smb_nt_MaxSetupCount,msetup);
 273         SCVAL(cli->outbuf,smb_nt_Flags,flags);
 274         SIVAL(cli->outbuf,smb_nt_TotalParameterCount, lparam);
 275         SIVAL(cli->outbuf,smb_nt_TotalDataCount, ldata);
 276         SIVAL(cli->outbuf,smb_nt_MaxParameterCount, mparam);
 277         SIVAL(cli->outbuf,smb_nt_MaxDataCount, mdata);
 278         SIVAL(cli->outbuf,smb_nt_ParameterCount, this_lparam);
 279         SIVAL(cli->outbuf,smb_nt_ParameterOffset, smb_offset(outparam,cli->outbuf));
 280         SIVAL(cli->outbuf,smb_nt_DataCount, this_ldata);
 281         SIVAL(cli->outbuf,smb_nt_DataOffset, smb_offset(outdata,cli->outbuf));
 282         SIVAL(cli->outbuf,smb_nt_SetupCount, lsetup);
 283         SIVAL(cli->outbuf,smb_nt_Function, function);
 284         for (i=0;i<lsetup;i++)          /* setup[] */
 285                 SSVAL(cli->outbuf,smb_nt_SetupStart+i*2,setup[i]);
 286
 287         if (this_lparam)                        /* param[] */
 288                 memcpy(outparam,param,this_lparam);
 289         if (this_ldata)                 /* data[] */
 290                 memcpy(outdata,data,this_ldata);
 291
 292         cli_setup_bcc(cli, outdata+this_ldata);
 293
 294         show_msg(cli->outbuf);
 295         cli_send_smb(cli);
 296
 297         if (this_ldata < ldata || this_lparam < lparam) {
 298                 /* receive interim response */
 299                 if (!cli_receive_smb(cli) ||
 300                     CVAL(cli->inbuf,smb_rcls) != 0) {
 301                         return(False);
 302                 }
 303
 304                 tot_data = this_ldata;
 305                 tot_param = this_lparam;
 306
 307                 while (tot_data < ldata || tot_param < lparam)  {
 308                         this_lparam = MIN(lparam-tot_param,cli->max_xmit - 500); /* hack */
 309                         this_ldata = MIN(ldata-tot_data,cli->max_xmit - (500+this_lparam));
 310
 311                         set_message(cli->outbuf,18,0,True);
 312                         CVAL(cli->outbuf,smb_com) = SMBnttranss;
 313
 314                         /* XXX - these should probably be aligned */
 315                         outparam = smb_buf(cli->outbuf);
 316                         outdata = outparam+this_lparam;
 317
 318                         /* secondary request */
 319                         SIVAL(cli->outbuf,smb_nts_TotalParameterCount,lparam);
 320                         SIVAL(cli->outbuf,smb_nts_TotalDataCount,ldata);
 321                         SIVAL(cli->outbuf,smb_nts_ParameterCount,this_lparam);
 322                         SIVAL(cli->outbuf,smb_nts_ParameterOffset,smb_offset(outparam,cli->outbuf));
 323                         SIVAL(cli->outbuf,smb_nts_ParameterDisplacement,tot_param);
 324                         SIVAL(cli->outbuf,smb_nts_DataCount,this_ldata);
 325                         SIVAL(cli->outbuf,smb_nts_DataOffset,smb_offset(outdata,cli->outbuf));
 326                         SIVAL(cli->outbuf,smb_nts_DataDisplacement,tot_data);
 327                         if (this_lparam)                        /* param[] */
 328                                 memcpy(outparam,param+tot_param,this_lparam);
 329                         if (this_ldata)                 /* data[] */
 330                                 memcpy(outdata,data+tot_data,this_ldata);
 331                         cli_setup_bcc(cli, outdata+this_ldata);
 332
 333                         show_msg(cli->outbuf);
 334                         cli_send_smb(cli);
 335
 336                         tot_data += this_ldata;
 337                         tot_param += this_lparam;
 338                 }
 339         }
 340
 341         return(True);
 342 }
 343
 344
 345
 346 /****************************************************************************
 347   receive a SMB nttrans response allocating the necessary memory
 348   ****************************************************************************/
 349 BOOL cli_receive_nt_trans(struct cli_state *cli,
 350                           char **param, int *param_len,
 351                           char **data, int *data_len)
 352 {
 353         int total_data=0;
 354         int total_param=0;
 355         int this_data,this_param;
 356         uint8 eclass;
 357         uint32 ecode;
 358
 359         *data_len = *param_len = 0;
 360
 361         if (!cli_receive_smb(cli))
 362                 return False;
 363
 364         show_msg(cli->inbuf);
 365
 366         /* sanity check */
 367         if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 368                 DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 369                          CVAL(cli->inbuf,smb_com)));
 370                 return(False);
 371         }
 372
 373         /*
 374          * An NT RPC pipe call can return ERRDOS, ERRmoredata
 375          * to a trans call. This is not an error and should not
 376          * be treated as such.
 377          */
 378         if (cli_error(cli, &eclass, &ecode, NULL)) {
 379                 if (cli->nt_pipe_fnum == 0 || !(eclass == ERRDOS && ecode == ERRmoredata))
 380                         return(False);
 381         }
 382
 383         /* parse out the lengths */
 384         total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 385         total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 386
 387         /* allocate it */
 388         *data = Realloc(*data,total_data);
 389         *param = Realloc(*param,total_param);
 390
 391         while (1)  {
 392                 this_data = SVAL(cli->inbuf,smb_ntr_DataCount);
 393                 this_param = SVAL(cli->inbuf,smb_ntr_ParameterCount);
 394
 395                 if (this_data + *data_len > total_data ||
 396                     this_param + *param_len > total_param) {
 397                         DEBUG(1,("Data overflow in cli_receive_trans\n"));
 398                         return False;
 399                 }
 400
 401                 if (this_data)
 402                         memcpy(*data + SVAL(cli->inbuf,smb_ntr_DataDisplacement),
 403                                smb_base(cli->inbuf) + SVAL(cli->inbuf,smb_ntr_DataOffset),
 404                                this_data);
 405                 if (this_param)
 406                         memcpy(*param + SVAL(cli->inbuf,smb_ntr_ParameterDisplacement),
 407                                smb_base(cli->inbuf) + SVAL(cli->inbuf,smb_ntr_ParameterOffset),
 408                                this_param);
 409                 *data_len += this_data;
 410                 *param_len += this_param;
 411
 412                 /* parse out the total lengths again - they can shrink! */
 413                 total_data = SVAL(cli->inbuf,smb_ntr_TotalDataCount);
 414                 total_param = SVAL(cli->inbuf,smb_ntr_TotalParameterCount);
 415
 416                 if (total_data <= *data_len && total_param <= *param_len)
 417                         break;
 418
 419                 if (!cli_receive_smb(cli))
 420                         return False;
 421
 422                 show_msg(cli->inbuf);
 423
 424                 /* sanity check */
 425                 if (CVAL(cli->inbuf,smb_com) != SMBnttrans) {
 426                         DEBUG(0,("Expected SMBnttrans response, got command 0x%02x\n",
 427                                  CVAL(cli->inbuf,smb_com)));
 428                         return(False);
 429                 }
 430                 if (cli_error(cli, &eclass, &ecode, NULL)) {
 431                         if(cli->nt_pipe_fnum == 0 || !(eclass == ERRDOS && ecode == ERRmoredata))
 432                                 return(False);
 433                 }
 434         }
 435
 436         return(True);
 437 }