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/* tuntap.c: TUN/TAP compatability layer
Copyright (c) 2009-2010 Patrik Persson, Philip Kendall
$Id: tuntap.c 4898 2013-02-25 22:20:54Z pak21 $
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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Author contact information:
E-mail: philip-fuse@shadowmagic.org.uk
*/
#include "config.h"
#include <fcntl.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <linux/if_tun.h>
#include <net/if.h>
#include <sys/ioctl.h>
#include "ui/ui.h"
int
compat_get_tap( const char *interface_name )
{
int fd = -1;
if ( (fd = open( "/dev/net/tun", O_RDWR | O_NONBLOCK )) < 0 )
ui_error( UI_ERROR_ERROR, "couldn't open TUN/TAP device '/dev/net/tun'" );
else {
struct ifreq ifr;
memset( &ifr, 0, sizeof( ifr ) );
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
strncpy( ifr.ifr_name, interface_name, IFNAMSIZ );
if ( ioctl( fd, TUNSETIFF, (void *) &ifr ) < 0 ) {
ui_error( UI_ERROR_ERROR, "couldn't select TAP interface '%s'",
ifr.ifr_name );
}
}
return fd;
}
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