/* 
This simple program changes the mac address of an interface for linux
code by dr_fdisk

dr_fdisk@raza-mexicana.org
w w w . r a z a - m e x i c a n a . o r g
*/


#include <stdio.h>
#include <net/if.h>
#include <sys/ioctl.h>

char mac[6];
char maca[17];
struct  ifreq  interfaz;
int i,eaea;
void main(int argc , char *argv[])
{
if (argc<3){
printf("MACFUCK by dr_fdisk^ (dr_fdisk@raza-mexicana.org)\n");
printf("=================================================\n");
printf("uso:%s interfaz mac-address\n",argv[0]);
printf("ex:%s eth0 AA:AA:AA:AA:AA:AA\n",argv[0]);
exit(0);}


if (!(2[argv[2]] == ':' && 5[argv[2]] == ':' && 8[argv[2]] == ':' && 
11[argv[2]] == ':' && 14[argv[2]] == ':' && strlen(argv[2]) == 17 )){
printf("La Mac que ingreso no es valida!\n");
printf("Ingresala en este formato: XX:XX:XX:XX:XX:XX\n");exit(0);}
for(i = 0; i < 6; i++) i[mac] = (char)(strtoul(argv[2] + i*3, 0, 16) & 0xff);
eaea = socket(AF_INET, SOCK_DGRAM, 0);
if (eaea < 0){
perror("socket");
exit(1);}
sprintf(interfaz.ifr_name, "%s",argv[1]);
if (ioctl(eaea, SIOCGIFHWADDR, &interfaz) < 0){
perror(interfaz.ifr_name);
exit(1);}
for(i = 0; i < 6; i++) i[interfaz.ifr_hwaddr.sa_data] = i[mac];
if (ioctl(eaea,SIOCSIFHWADDR,&interfaz) < 0){
printf("No puedo cambiar la mac, revisa si %s, esta levantada\n",argv[1]);
perror(interfaz.ifr_name);
exit(1);}
printf("EAEA!\nLa MAC actual es: "); for (i = 0; i < 6; i++){
printf("%2.2x:", i[interfaz.ifr_hwaddr.sa_data] & 0xff);}
printf("\n");
close(eaea);
}