52 lines
1.6 KiB
Python
52 lines
1.6 KiB
Python
# Copyright (c) 2018 Red Hat, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import subprocess
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class FilterModule(object):
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def dns(self, value, family):
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ret = set()
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if family == '4':
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match = 'has address'
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elif family == '6':
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match = 'has IPv6 address'
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try:
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# Note we use 'host' rather than something like
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# getaddrinfo so we actually query DNS and don't get any
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# local-only results from /etc/hosts
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output = subprocess.check_output(
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['/usr/bin/host', value], universal_newlines=True)
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for line in output.split('\n'):
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if match in line:
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address = line.split()[-1]
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ret.add(address)
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except Exception as e:
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return ret
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return sorted(ret)
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def dns_a(self, value):
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return self.dns(value, '4')
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def dns_aaaa(self, value):
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return self.dns(value, '6')
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def filters(self):
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return {
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'dns_a': self.dns_a,
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'dns_aaaa': self.dns_aaaa,
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}
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