45 lines
1.3 KiB
Python
45 lines
1.3 KiB
Python
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import socket
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from shutil import copyfile, move
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from os import remove
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from os.path import isfile
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class MookDns:
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# Monkey patch to force IPv4 resolution
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def __init__(self, ip):
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self.ip = ip
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def __enter__(self):
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self.old_getaddrinfo = socket.getaddrinfo
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def new_getaddrinfo(*args, **kwargs):
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ret = self.old_getaddrinfo(*args, **kwargs)
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dns = list(ret[0])
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dns[-1] = (self.ip, dns[-1][1])
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return [dns]
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socket.getaddrinfo = new_getaddrinfo
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return self
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def __exit__(self, exc_type, exc, tb):
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socket.getaddrinfo = self.old_getaddrinfo
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class MookDnsSystem:
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# Monkey patch to force IPv4 resolution
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def __init__(self, dns, ip):
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self.dns = dns
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self.ip = ip
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def __enter__(self):
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if not isfile('/etc/hosts.risotto'):
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copyfile('/etc/hosts', '/etc/hosts.risotto')
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with open('/etc/hosts.risotto', 'r') as risotto:
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with open('/etc/hosts', 'w') as hosts:
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for line in risotto.readlines():
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if self.dns not in line:
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hosts.write(line)
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hosts.write(f'{self.ip} {self.dns}')
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def __exit__(self, exc_type, exc, tb):
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remove('/etc/hosts')
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move('/etc/hosts.risotto', '/etc/hosts')
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