#!/usr/bin/env python3 import ipaddress import sys def hexstr2int(string): return int(string.replace(':', ''), 16) FIRST_MAC = hexstr2int('02:00:b3:39:79:4d') FIRST_V4 = ipaddress.ip_address('185.203.112.2') FIRST_V6 = "2a0a:e5c0:0:2:400:b3ff:fe39:794d" V6_NAT64_BASE = ipaddress.ip_address("2a0a:e5c0:0:1:0:1::") def v4_from_mac(mac): """Calculates the IPv4 address from a MAC address. mac: string (the colon-separated representation) returns: ipaddress.ip_address object with the v4 address """ return FIRST_V4 + (hexstr2int(mac) - FIRST_MAC) def v4_from_v6(ipv6ip): """Calculates the IPv4 address from the IPv4 address ipv6ip: the ip returns: ipaddress.ip_address object with the v4 address """ return FIRST_V4 + (hexstr2int(ipv6ip) - (hexstr2int(FIRST_V6))) def v6_from_v4(ipv4): v4addr = ipaddress.ip_address(ipv4) return V6_NAT64_BASE + int(v4addr) if __name__ == "__main__": addr = sys.argv[1] out = [] try: out.append(v4_from_v6(addr)) except: pass try: out.append(v6_from_v4(addr)) except: pass print("{}".format(out)) # test.ch # 2a0a:e5c0:0:1:0:1:504a:8a8c # 80.74.138.140 # 1347062412 #