2006-11-30 23:23:39 +00:00
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# adapted from nattraverso.ipdiscover
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from twisted.internet import reactor
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from twisted.internet.protocol import DatagramProtocol
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#from twisted.internet.error import CannotListenError
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#from twisted.internet.interfaces import IReactorMulticast
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#from amdlib.util.nattraverso.utils import is_rfc1918_ip, is_bogus_ip
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2006-11-30 23:39:38 +00:00
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def get_local_ip_for(target='A.ROOT-SERVERS.NET'):
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2006-11-30 23:23:39 +00:00
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"""Find out what our IP address is for use by a given target.
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Returns a Deferred which will be fired with a string that holds the IP
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address which could be used by 'target' to connect to us. It might work
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for them, it might not.
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The reactor must be running before you can call this, because we must
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perform a DNS lookup on the target.
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"""
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d = reactor.resolve(target)
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def _resolved(target_ipaddr):
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udpprot = DatagramProtocol()
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port = reactor.listenUDP(0, udpprot)
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udpprot.transport.connect(target_ipaddr, 7)
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localip = udpprot.transport.getHost().host
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port.stopListening()
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return localip
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d.addCallback(_resolved)
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return d
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def BROKEN_get_local_ip_for(target_ipaddr):
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"""Find out what our IP address is for use by a given target.
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Returns a Deferred which will be fired with a string that holds the IP
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address which could be used by 'target' to connect to us. It might work
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for them, it might not. 'target' must be an IP address.
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"""
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udpprot = DatagramProtocol()
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port = reactor.listenUDP(0, udpprot)
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udpprot.transport.connect(target_ipaddr, 7)
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localip = udpprot.transport.getHost().host
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port.stopListening()
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return localip
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