samba-mirror/source3/smbd/error.c

/* 
   Unix SMB/Netbios implementation.
   Version 1.9.
   error packet handling
   Copyright (C) Andrew Tridgell 1992-1998
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "includes.h"

extern int DEBUGLEVEL;

/* these can be set by some functions to override the error codes */
int unix_ERR_class=SMB_SUCCESS;
int unix_ERR_code=0;


/****************************************************************************
  create an error packet from a cached error.
****************************************************************************/
int cached_error_packet(char *inbuf,char *outbuf,files_struct *fsp,int line)
{
  write_bmpx_struct *wbmpx = fsp->wbmpx_ptr;

  int32 eclass = wbmpx->wr_errclass;
  int32 err = wbmpx->wr_error;

  /* We can now delete the auxiliary struct */
  free((char *)wbmpx);
  fsp->wbmpx_ptr = NULL;
  return error_packet(inbuf,outbuf,eclass,err,line);
}


struct
{
  int unixerror;
  int smbclass;
  int smbcode;
} unix_smb_errmap[] =
{
  {EPERM,ERRDOS,ERRnoaccess},
  {EACCES,ERRDOS,ERRnoaccess},
  {ENOENT,ERRDOS,ERRbadfile},
  {ENOTDIR,ERRDOS,ERRbadpath},
  {EIO,ERRHRD,ERRgeneral},
  {EBADF,ERRSRV,ERRsrverror},
  {EINVAL,ERRSRV,ERRsrverror},
  {EEXIST,ERRDOS,ERRfilexists},
  {ENFILE,ERRDOS,ERRnofids},
  {EMFILE,ERRDOS,ERRnofids},
  {ENOSPC,ERRHRD,ERRdiskfull},
#ifdef EDQUOT
  {EDQUOT,ERRHRD,ERRdiskfull},
#endif
#ifdef ENOTEMPTY
  {ENOTEMPTY,ERRDOS,ERRnoaccess},
#endif
#ifdef EXDEV
  {EXDEV,ERRDOS,ERRdiffdevice},
#endif
  {EROFS,ERRHRD,ERRnowrite},
  {0,0,0}
};

/****************************************************************************
  create an error packet from errno
****************************************************************************/
int unix_error_packet(char *inbuf,char *outbuf,int def_class,uint32 def_code,int line)
{
  int eclass=def_class;
  int ecode=def_code;
  int i=0;

  if (unix_ERR_class != SMB_SUCCESS)
    {
      eclass = unix_ERR_class;
      ecode = unix_ERR_code;
      unix_ERR_class = SMB_SUCCESS;
      unix_ERR_code = 0;
    }
  else
    {
      while (unix_smb_errmap[i].smbclass != 0)
      {
	    if (unix_smb_errmap[i].unixerror == errno)
	    {
	      eclass = unix_smb_errmap[i].smbclass;
	      ecode = unix_smb_errmap[i].smbcode;
	      break;
	    }
	  i++;
      }
    }

  return(error_packet(inbuf,outbuf,eclass,ecode,line));
}


/****************************************************************************
  create an error packet. Normally called using the ERROR() macro
****************************************************************************/
int error_packet(char *inbuf,char *outbuf,int error_class,uint32 error_code,int line)
{
  int outsize = set_message(outbuf,0,0,True);
  int cmd = CVAL(inbuf,smb_com);
  int flgs2 = SVAL(outbuf,smb_flg2); 

  if ((flgs2 & FLAGS2_32_BIT_ERROR_CODES) == FLAGS2_32_BIT_ERROR_CODES)
  {
    SIVAL(outbuf,smb_rcls,error_code);
    
    DEBUG( 3, ( "32 bit error packet at line %d cmd=%d (%s) eclass=%08x [%s]\n",
              line, cmd, smb_fn_name(cmd), error_code, smb_errstr(outbuf) ) );
  }
  else
  {
    CVAL(outbuf,smb_rcls) = error_class;
    SSVAL(outbuf,smb_err,error_code);  
    DEBUG( 3, ( "error packet at line %d cmd=%d (%s) eclass=%d ecode=%d\n",
	      line,
	      (int)CVAL(inbuf,smb_com),
	      smb_fn_name(CVAL(inbuf,smb_com)),
	      error_class,
	      error_code ) );

  }
  
  if (errno != 0)
    DEBUG(3,("error string = %s\n",strerror(errno)));
  
  return(outsize);
}