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"""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.error:
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.error:
pass
finally:
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]
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