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#!/usr/bin/env python2
""" Simple DNS client
A simple example of a client using the DNS resolver.
"""
import dns.resolver
def main():
"""Run the client"""
# Parse arguments
import argparse
parser = argparse.ArgumentParser(description="DNS Client")
parser.add_argument("hostname", help="hostname to resolve")
parser.add_argument(
"-c", "--caching", action="store_true",
help="Enable caching")
parser.add_argument(
"-t", "--ttl", metavar="time", type=int, default=0,
help="TTL value of cached entries")
args = parser.parse_args()
# Resolve hostname
resolver = dns.resolver.Resolver(["localhost"], 15, args.caching, args.ttl)
hostname, aliases, addresses = resolver.gethostbyname(args.hostname)
# Print output
print hostname
print list(aliases)
print list(addresses)
if __name__ == "__main__":
main()
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