blob: a4610a2bf6b3cb28275f9e38e729a8d602a9bc1f [file] [log] [blame]
#
# Copyright 2017 the original author or authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
"""
Some network related convenience functions
"""
from netifaces import AF_INET
import netifaces as ni
import netaddr
def _get_all_interfaces():
m_interfaces = []
for iface in ni.interfaces():
m_interfaces.append((iface, ni.ifaddresses(iface)))
return m_interfaces
def _get_my_primary_interface():
gateways = ni.gateways()
assert 'default' in gateways, \
("No default gateway on host/container, "
"cannot determine primary interface")
default_gw_index = gateways['default'].keys()[0]
# gateways[default_gw_index] has the format (example):
# [('10.15.32.1', 'en0', True)]
interface_name = gateways[default_gw_index][0][1]
return interface_name
def get_my_primary_local_ipv4(inter_core_subnet=None, ifname=None):
if not inter_core_subnet:
return _get_my_primary_local_ipv4(ifname)
# My IP should belong to the specified subnet
for iface in ni.interfaces():
m_ip = ni.ifaddresses(iface)[AF_INET][0]['addr']
_ip = netaddr.IPAddress(m_ip).value
m_network = netaddr.IPNetwork(inter_core_subnet)
if _ip >= m_network.first and _ip <= m_network.last:
return m_ip
return None
def get_my_primary_interface(pon_subnet=None):
if not pon_subnet:
return _get_my_primary_interface()
# My interface should have an IP that belongs to the specified subnet
for iface in ni.interfaces():
m_ip = ni.ifaddresses(iface)[AF_INET][0]['addr']
m_ip = netaddr.IPAddress(m_ip).value
m_network = netaddr.IPNetwork(pon_subnet)
if m_ip >= m_network.first and m_ip <= m_network.last:
return iface
return None
def _get_my_primary_local_ipv4(ifname=None):
try:
ifname = get_my_primary_interface() if ifname is None else ifname
addresses = ni.ifaddresses(ifname)
ipv4 = addresses[AF_INET][0]['addr']
return ipv4
except Exception as e:
return None
if __name__ == '__main__':
print get_my_primary_local_ipv4()