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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
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65 lines
2.3 KiB
65 lines
2.3 KiB
#!/usr/bin/env python2.7 |
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# Copyright 2015 gRPC authors. |
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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 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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"""Makes DNS queries for A records to specified servers""" |
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import argparse |
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import threading |
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import time |
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import twisted.internet.task as task |
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import twisted.names.client as client |
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import twisted.internet.reactor as reactor |
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def main(): |
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argp = argparse.ArgumentParser(description='Make DNS queries for A records') |
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argp.add_argument('-s', |
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'--server_host', |
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default='127.0.0.1', |
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type=str, |
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help='Host for DNS server to listen on for TCP and UDP.') |
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argp.add_argument('-p', |
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'--server_port', |
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default=53, |
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type=int, |
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help='Port that the DNS server is listening on.') |
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argp.add_argument('-n', |
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'--qname', |
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default=None, |
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type=str, |
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help=('Name of the record to query for. ')) |
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argp.add_argument('-t', |
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'--timeout', |
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default=1, |
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type=int, |
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help=('Force process exit after this number of seconds.')) |
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args = argp.parse_args() |
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def OnResolverResultAvailable(result): |
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answers, authority, additional = result |
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for a in answers: |
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print(a.payload) |
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def BeginQuery(reactor, qname): |
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servers = [(args.server_host, args.server_port)] |
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resolver = client.Resolver(servers=servers) |
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deferred_result = resolver.lookupAddress(args.qname) |
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deferred_result.addCallback(OnResolverResultAvailable) |
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return deferred_result |
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task.react(BeginQuery, [args.qname]) |
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if __name__ == '__main__': |
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main()
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