/* ... */
/* this file is part of netraf project */
/* Copyright (c) 2005 M.S. */

/*
  little example of how to obtain device's MAC address.
  This currently compile only on linux. In BSD systems
  instead of <sys/ioctl.h> is something like <compat/linux/linux-ioctl.h>
  but doesn't work for me now...
*/


#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <netinet/in.h>


int main(int argc, char *argv[]){
	int s;
	struct ifreq interface;
	unsigned char mac[6];
	
	
	if(argc != 2){
		printf("Usage: %s <eth_name>\n", argv[0]);
		exit(EXIT_FAILURE);
	}
	
	if((s=socket(AF_INET, SOCK_DGRAM, IPPROTO_IP)) == -1)
		exit(EXIT_FAILURE);
	
	strcpy(interface.ifr_name, argv[1]);
	
	if(ioctl(s, SIOCGIFHWADDR, &interface) == -1){
		perror("ioctl(SIOCGIFHWADDR)");
		exit(EXIT_FAILURE);
	}
	
	memcpy(mac, interface.ifr_hwaddr.sa_data, 6);
	
	printf("%s HWaddr %.2X:%.2X:%.2X:%.2X:%.2X:%.2X\n", argv[1],
			mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
	
	exit(EXIT_SUCCESS);
}