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#!/usr/bin/env python3
import os
import sys
from vyos.util import call
IPSEC_CONF="/etc/ipsec.conf"
IPSEC_SECRETS="/etc/ipsec.secrets"
def getlines(file):
with open(file, 'r') as f:
return f.readlines()
def writelines(file, lines):
with open(file, 'w') as f:
f.writelines(lines)
if __name__ == '__main__':
interface = os.getenv('interface')
new_ip = os.getenv('new_ip_address')
old_ip = os.getenv('old_ip_address')
reason = os.getenv('reason')
if (old_ip == new_ip and reason != 'BOUND') or reason in ['REBOOT', 'EXPIRE']:
sys.exit(0)
conf_lines = getlines(IPSEC_CONF)
secrets_lines = getlines(IPSEC_SECRETS)
found = False
to_match = f'# dhcp:{interface}'
for i, line in enumerate(conf_lines):
if line.find(to_match) > 0:
conf_lines[i] = line.replace(old_ip, new_ip)
found = True
for i, line in enumerate(secrets_lines):
if line.find(to_match) > 0:
secrets_lines[i] = line.replace(old_ip, new_ip)
if found:
writelines(IPSEC_CONF, conf_lines)
writelines(IPSEC_SECRETS, secrets_lines)
call('sudo /usr/sbin/ipsec rereadall')
call('sudo /usr/sbin/ipsec reload')
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