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