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#!/usr/bin/env python3
#
# Copyright (C) 2020 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/>.
import os
import argparse
from sys import exit
from psutil import process_iter
from time import strftime, localtime, time
PPP_LOGFILE = '/var/log/vyatta/ppp_{}.log'
def check_interface(interface):
if not os.path.isfile('/etc/ppp/peers/{}'.format(interface)):
print('Interface {}: invalid!'.format(interface))
exit(1)
def check_ppp_running(interface):
"""
Check if ppp process is running in the interface in question
"""
for p in process_iter():
if "pppd" in p.name():
if interface in p.cmdline():
return True
return False
def connect(interface):
"""
Connect PPP interface
"""
check_interface(interface)
# Check if interface is already dialed
if os.path.isdir('/sys/class/net/{}'.format(interface)):
print('Interface {}: already connected!'.format(interface))
elif check_ppp_running(interface):
print('Interface {}: connection is beeing established!'.format(interface))
else:
print('Interface {}: connecting...'.format(interface))
user = os.environ['SUDO_USER']
tm = strftime("%a %d %b %Y %I:%M:%S %p %Z", localtime(time()))
with open(PPP_LOGFILE.format(interface), 'a') as f:
f.write('{}: user {} started PPP daemon for {} by connect command\n'.format(tm, user, interface))
cmd = 'umask 0; setsid sh -c "nohup /usr/sbin/pppd call {0} > /tmp/{0}.log 2>&1 &"'.format(interface)
os.system(cmd)
def disconnect(interface):
"""
Disconnect PPP interface
"""
check_interface(interface)
# Check if interface is already down
if not check_ppp_running(interface):
print('Interface {}: connection is already down'.format(interface))
else:
print('Interface {}: disconnecting...'.format(interface))
user = os.environ['SUDO_USER']
tm = strftime("%a %d %b %Y %I:%M:%S %p %Z", localtime(time()))
with open(PPP_LOGFILE.format(interface), 'a') as f:
f.write('{}: user {} stopped PPP daemon for {} by disconnect command\n'.format(tm, user, interface))
cmd = '/usr/bin/poff "{}"'.format(interface)
os.system(cmd)
def main():
parser = argparse.ArgumentParser()
group = parser.add_mutually_exclusive_group()
group.add_argument("--connect", help="Bring up a connection-oriented network interface", action="store")
group.add_argument("--disconnect", help="Take down connection-oriented network interface", action="store")
args = parser.parse_args()
if args.connect:
connect(args.connect)
elif args.disconnect:
disconnect(args.disconnect)
else:
parser.print_help()
exit(0)
if __name__ == '__main__':
main()
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