#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <linux/if_tun.h>

int main()
{
	struct ifreq ifr;
	int fd, err;
	if ( (fd = open("/dev/net/tun", O_RDWR)) < 0)
	{
		fprintf(stderr, "Couldn't open /dev/net/tun!\n");
		return -1;
	}

	memset(&ifr, 0, sizeof(ifr));

	ifr.ifr_flags = IFF_TUN;
	strncpy(ifr.ifr_name, "tun99", IFNAMSIZ);

	if ( (err = ioctl(fd, TUNSETIFF, &ifr)) < 0)
	{
		close(fd);
		fprintf(stderr, "Couldn't ioctl(fd, TUNSETIFF, &ifr)!\n");
		return -2;
	}
	printf("Device name: %s\n", ifr.ifr_name);

	printf("Hit enter\n");
	char chr;
	scanf("%c", &chr);

	close(fd);
	return 0;
}