rem: print_mac(((struct ipt_mac_info *)match->data)->srcaddr, ((struct ipt_mac_info *)match->data)->invert);
add: print_mac(((struct ipt_mac_info *)match->data)->srcaddr);
context: static void save(const struct ipt_ip *ip, const struct ipt_entry_match *match){	printf("--mac-source ");	print_mac(((struct ipt_mac_info *)match->data)->srcaddr,		  ((struct ipt_mac_info *)match->data)->invert);}