#include <stdio.h> 
 #include <unistd.h> 
 #include <sys/ioctl.h> 
 #include <sys/types.h> 
 #include <sys/socket.h> 
 #include <net/raw.h> 
 #include <net/if.h> 
 #include <net/soioctl.h> 

main(int argc,char **argv) 
 { 
         int cnt,ret,sock,a1,a2,a3,a4,a5,a6; 
         struct ifreq ifdat; 
         struct sockaddr_raw sr; 

        if (argc<3) 
         { 
                 printf("usage : %s <interface> <eaddr>\n",argv[0]); 
                 exit(1); 
         } 

        sock=socket(PF_RAW, SOCK_RAW, RAWPROTO_SNOOP); 

        if (sock<0) { 
                 perror("socket:"); 
                 exit(1); 
         } 

        strcpy(ifdat.ifr_name, argv[1]); 
         ret=ioctl(sock, SIOCGIFADDR, &ifdat ); 
         if (ret<0) 
         { 
                 printf("ret=%d\n", ret); 
                 perror("ioctl:"); 
                 exit(1); 
         } 

        printf("Current address : %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n", 
                 ifdat.ifr_ifru.ifru_enaddr[2], ifdat.ifr_ifru.ifru_enaddr[3], 
                 ifdat.ifr_ifru.ifru_enaddr[4], ifdat.ifr_ifru.ifru_enaddr[5], 
                 ifdat.ifr_ifru.ifru_enaddr[6], ifdat.ifr_ifru.ifru_enaddr[7]); 


        sscanf(argv[2],"%x:%x:%x:%x:%x:%x", &a1,&a2,&a3,&a4,&a5,&a6); 
         printf("setting %s to %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n", 
                                 argv[1],a1,a2,a3,a4,a5,a6); 

        ifdat.ifr_ifru.ifru_enaddr[2]=a1; ifdat.ifr_ifru.ifru_enaddr[3]=a2; 
         ifdat.ifr_ifru.ifru_enaddr[4]=a3; ifdat.ifr_ifru.ifru_enaddr[5]=a4; 
         ifdat.ifr_ifru.ifru_enaddr[6]=a5; ifdat.ifr_ifru.ifru_enaddr[7]=a6; 

        ret=ioctl(sock, SIOCSIFADDR, &ifdat ); 
         if (ret<0) 
         { 
                 printf("ret=%d\n", ret); 
                 perror("ioctl:"); 
                 exit(1); 
         } 
         printf("Done\n"); 
         return 0; 
 }