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/*
* dhcpcd - DHCP client daemon -
* Copyright (C) 1996 - 1997 Yoichi Hariguchi <yoichi@fore.com>
* Copyright (C) January, 1998 Sergei Viznyuk <sv@phystech.com>
*
* dhcpcd is an RFC2131 and RFC1541 compliant DHCP client daemon.
*
* This 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 <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "pathnames.h"
#include "kversion.h"
#include "client.h"
#include "dhcpcd.h"
extern char *ConfigDir;
extern char *IfNameExt;
extern int prev_ip_addr;
extern dhcpInterface DhcpIface;
char cache_file[128];
/*****************************************************************************/
int readDhcpCache()
{
int i,o;
snprintf(cache_file,sizeof(cache_file),DHCP_CACHE_FILE,ConfigDir,IfNameExt);
i=open(cache_file,O_RDONLY);
if ( i == -1 ) return -1;
o=read(i,(char *)&DhcpIface,sizeof(dhcpInterface));
close(i);
if ( o != sizeof(dhcpInterface) ) return -1;
if ( strncmp(DhcpIface.version,VERSION,sizeof(DhcpIface.version)) ) return -1;
prev_ip_addr = DhcpIface.ciaddr;
return 0;
}
/*****************************************************************************/
void deleteDhcpCache()
{
snprintf(cache_file,sizeof(cache_file),DHCP_CACHE_FILE,ConfigDir,IfNameExt);
unlink(cache_file);
}
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