2023-09-23 14:42:00 +00:00
|
|
|
#!/usr/bin/env python3
|
|
|
|
|
|
|
|
|
|
import logging
|
|
|
|
|
from ipaddress import ip_address
|
|
|
|
|
from json import loads
|
|
|
|
|
from subprocess import check_output, run
|
|
|
|
|
|
|
|
|
|
DOMAIN = '${domain}'
|
|
|
|
|
|
|
|
|
|
# <%text>
|
|
|
|
|
logging.basicConfig(level=logging.INFO)
|
|
|
|
|
LOG = logging.getLogger('DynDNS checker')
|
|
|
|
|
try:
|
|
|
|
|
iproute = loads(check_output(['ip', '-json', 'address', 'show', 'scope', 'global']))
|
|
|
|
|
resolved_ipv4 = check_output(['dig', '+short', DOMAIN, 'A']).decode().strip()
|
|
|
|
|
resolved_ipv6 = check_output(['dig', '+short', DOMAIN, 'AAAA']).decode().strip()
|
|
|
|
|
|
|
|
|
|
LOG.info(f'resolved ipv4 is "{resolved_ipv4}"')
|
|
|
|
|
LOG.info(f'resolved ipv6 is "{resolved_ipv6}"')
|
|
|
|
|
|
|
|
|
|
needs_changing = False
|
|
|
|
|
|
|
|
|
|
for iface in iproute:
|
|
|
|
|
if not iface['ifname'].startswith('ppp'):
|
|
|
|
|
LOG.debug(f'ignoring {iface["ifname"]}')
|
|
|
|
|
continue
|
|
|
|
|
|
|
|
|
|
LOG.info(f'working on {iface["ifname"]}')
|
|
|
|
|
for ip in iface['addr_info']:
|
|
|
|
|
try:
|
|
|
|
|
addr = ip_address(ip['local'])
|
|
|
|
|
|
|
|
|
|
LOG.info(f'{iface["ifname"]} has ip {addr.compressed}')
|
|
|
|
|
|
|
|
|
|
if (
|
|
|
|
|
(addr.version == 4 and addr.compressed != resolved_ipv4)
|
|
|
|
|
or (addr.version == 6 and addr.compressed != resolved_ipv6)
|
|
|
|
|
):
|
|
|
|
|
needs_changing = True
|
|
|
|
|
except Exception:
|
|
|
|
|
continue
|
|
|
|
|
|
|
|
|
|
if needs_changing:
|
|
|
|
|
LOG.warning('addresses have changed, calling update script!')
|
|
|
|
|
run(['/etc/ppp/ip-up.d/dyndns'])
|
|
|
|
|
else:
|
|
|
|
|
LOG.info('everything is fine')
|
|
|
|
|
except Exception as e:
|
|
|
|
|
logging.exception(e)
|
|
|
|
|
|
|
|
|
|
# </%text>
|
