66 lines
1.5 KiB
Python
Executable File
66 lines
1.5 KiB
Python
Executable File
#! /usr/bin/env python
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import sys
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import json
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import codecs
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import re
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from datetime import datetime
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def str_to_domainlabel(s):
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label = re.sub("[^0-9a-zA-Z-]", "-", s)
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label = re.sub("-+", "-", label)
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label = re.sub("^-*", "", label)
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label = re.sub("-*$", "", label)
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if not re.match("^[a-zA-Z][a-zA-Z0-9-]*[a-zA-Z0-9]$", label):
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raise RuntimeError("Not convertable to a domain label: %s" % s)
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return label
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def ipv6_addr_to_rdns(addr):
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rdns = ""
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counter = 4
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for char in reversed(addr):
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if char == ':':
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rdns += counter * '0.'
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counter = 4
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else:
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rdns += char + '.'
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counter -= 1
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rdns += 'ip6.arpa.'
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return rdns
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data = json.load(sys.stdin)
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domain = sys.argv[1]
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if not domain.startswith("."):
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domain = "." + domain
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if not domain.endswith("."):
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domain = domain + "."
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print("""$TTL 1h
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@ IN SOA ns.ffhb. liste.bremen.freifunk.net. (
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%s ; serial
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1h ; refresh
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30m ; retry
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2d ; expiration
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1h ; caching
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)
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@ NS ns01.ffhb.
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""" % datetime.now().strftime("%Y%m%d%H%M"))
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for node in data.values():
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try:
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for address in node['network']['addresses']:
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if address.startswith("fe80:"):
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continue
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rdns = ipv6_addr_to_rdns(address)
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if rdns.endswith(domain):
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print "%s PTR %s.nodes.ffhb." % (ipv6_addr_to_rdns(address)[0:-len(domain)], str_to_domainlabel(node['hostname']))
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except:
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pass
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