Commit cd16a5d5 authored by Nico Schottelius's avatar Nico Schottelius

+rdns generator

Signed-off-by: default avatarNico Schottelius <nico@nico-notebook.schottelius.org>
parent 77385858
#!/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__":
first_addr = ipaddress.ip_address(sys.argv[1])
last_addr = ipaddress.ip_address(sys.argv[2])
while True:
addr = first_addr.reverse_pointer
name = "{}.place5.ungleich.ch".format(str(first_addr).replace(":",""))
record = "{}. IN PTR {}.".format(addr, name)
print(record)
if first_addr == last_addr:
break
first_addr += 1
sys.exit(0)
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
#
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