onionr/src/lan/getip.py

45 lines
1.5 KiB
Python

"""Onionr - Private P2P Communication.
Identify LAN ip addresses and determine the best one
"""
from ipaddress import IPv4Address
from psutil import net_if_addrs
from socket import AF_INET
"""
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
"""
lan_ips = []
# https://psutil.readthedocs.io/en/latest/#psutil.net_if_addrs
for interface in net_if_addrs().keys():
for address in net_if_addrs()[interface]:
# Don't see benefit in ipv6, so just check for v4 addresses
if address[0] == AF_INET:
# Mark the address for use in LAN if it is a private address
if IPv4Address(address[1]).is_private and not IPv4Address(address[1]).is_loopback:
lan_ips.append(address[1])
# These are more likely to be actual local subnets rather than VPNs
for ip in lan_ips:
if '192.168' in ip:
best_ip = ip
break
else:
try:
best_ip = lan_ips[0]
except IndexError:
best_ip = ""