59 lines
1.5 KiB
Python
Executable File
59 lines
1.5 KiB
Python
Executable File
#! /usr/bin/env python3
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import sys
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import json
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import re
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import ipaddress
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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("-*$", "", label)
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if not re.match("^[a-zA-Z][a-zA-Z0-9-]{,61}[a-zA-Z0-9]$", 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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return ".".join(reversed(addr.exploded.replace(':', ''))) + ".ip6.arpa."
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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 vpn01.bremen.freifunk.net. noc.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 vpn01.bremen.freifunk.net.
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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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try:
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address = ipaddress.IPv6Address(address)
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except ValueError:
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continue
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if address.is_link_local or address.is_private:
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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.de." % (rdns[0:-len(domain)], str_to_domainlabel(node['hostname'])))
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except (KeyError, RuntimeError):
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pass
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