"""Simple utility for building a list of local IPs using the socket module. This module defines two constants: LOCALHOST : The loopback interface, or the first interface that points to this machine. It will *almost* always be '127.0.0.1' LOCAL_IPS : A list of IP addresses, loopback first, that point to this machine. PUBLIC_IPS : A list of public IP addresses that point to this machine. Use these to tell remote clients where to find you. """ #----------------------------------------------------------------------------- # Copyright (C) 2010-2011 The IPython Development Team # # Distributed under the terms of the BSD License. The full license is in # the file COPYING, distributed as part of this software. #----------------------------------------------------------------------------- #----------------------------------------------------------------------------- # Imports #----------------------------------------------------------------------------- import socket from .data import uniq_stable #----------------------------------------------------------------------------- # Code #----------------------------------------------------------------------------- LOCAL_IPS = [] try: LOCAL_IPS = socket.gethostbyname_ex('localhost')[2] except socket.gaierror: pass PUBLIC_IPS = [] try: hostname = socket.gethostname() PUBLIC_IPS = socket.gethostbyname_ex(hostname)[2] # try hostname.local, in case hostname has been short-circuited to loopback if not hostname.endswith('.local') and all(ip.startswith('127') for ip in PUBLIC_IPS): PUBLIC_IPS = socket.gethostbyname_ex(socket.gethostname() + '.local')[2] except socket.gaierror: pass else: PUBLIC_IPS = uniq_stable(PUBLIC_IPS) LOCAL_IPS.extend(PUBLIC_IPS) # include all-interface aliases: 0.0.0.0 and '' LOCAL_IPS.extend(['0.0.0.0', '']) LOCAL_IPS = uniq_stable(LOCAL_IPS) LOCALHOST = LOCAL_IPS[0]