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#!/usr/bin/env python3
#
# Copyright (C) 2024 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# 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 <http://www.gnu.org/licenses/>.
# This is a Python hook script which is invoked whenever a PPPoE session goes
# "ip-up". It will call into our vyos.ifconfig library and will then execute
# common tasks for the PPPoE interface. The reason we have to "hook" this is
# that we can not create a pppoeX interface in advance in linux and then connect
# pppd to this already existing interface.
import os
import signal
from sys import argv
from sys import exit
from vyos.defaults import directories
# When the ppp link comes up, this script is called with the following
# parameters
# $1 the interface name used by pppd (e.g. ppp3)
# $2 the tty device name
# $3 the tty device speed
# $4 the local IP address for the interface
# $5 the remote IP address
# $6 the parameter specified by the 'ipparam' option to pppd
if (len(argv) < 7):
exit(1)
wlb_pid_file = '/run/wlb_daemon.pid'
interface = argv[6]
nexthop = argv[5]
if not os.path.exists(directories['ppp_nexthop_dir']):
os.mkdir(directories['ppp_nexthop_dir'])
nexthop_file = os.path.join(directories['ppp_nexthop_dir'], interface)
with open(nexthop_file, 'w') as f:
f.write(nexthop)
# Trigger WLB daemon update
if os.path.exists(wlb_pid_file):
with open(wlb_pid_file, 'r') as f:
pid = int(f.read())
os.kill(pid, signal.SIGUSR2)
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