33 lines
780 B
Python
33 lines
780 B
Python
|
from signal import SIGTERM, signal
|
||
|
|
from subprocess import CalledProcessError, check_output
|
||
|
|
from sys import exit
|
||
|
|
from time import sleep
|
||
|
|
|
||
|
|
PING_INTERVAL_IN_SECONDS = 80
|
||
|
|
|
||
|
|
signal(SIGTERM, lambda signum, frame: exit(0))
|
||
|
|
|
||
|
|
|
||
|
|
def getDefaultRoute():
|
||
|
|
routes = check_output(['route', '-n']).decode('utf-8').splitlines()
|
||
|
|
defaults = [r.split()[1] for r in routes if r.startswith('0.0.0.0')]
|
||
|
|
|
||
|
|
return defaults[0] if defaults else None
|
||
|
|
|
||
|
|
|
||
|
|
def keepalive(defaultRoute):
|
||
|
|
while True:
|
||
|
|
sleep(PING_INTERVAL_IN_SECONDS)
|
||
|
|
ping(defaultRoute)
|
||
|
|
|
||
|
|
|
||
|
|
def ping(address):
|
||
|
|
try:
|
||
|
|
check_output(['ping', '-c', '1', address])
|
||
|
|
except CalledProcessError as e:
|
||
|
|
pass
|
||
|
|
|
||
|
|
|
||
|
|
defaultRoute = getDefaultRoute()
|
||
|
|
keepalive(defaultRoute) if defaultRoute else print('No default route')
|