From a9c15dd2ffddc3a85985e6c1010892b1f69b9e7c Mon Sep 17 00:00:00 2001 From: ohrensessel Date: Tue, 19 Aug 2014 11:19:59 +0200 Subject: [PATCH] Improved version of the check_gateway script in case the vpn is offline, also shutdown radvd and dhcpd so that clients get a new default gateway when their lease time expires --- files/usr/local/bin/check_gateway | 29 ++++++++++++++++++++++------- 1 file changed, 22 insertions(+), 7 deletions(-) diff --git a/files/usr/local/bin/check_gateway b/files/usr/local/bin/check_gateway index 91059e0..589814b 100644 --- a/files/usr/local/bin/check_gateway +++ b/files/usr/local/bin/check_gateway @@ -1,7 +1,8 @@ #!/bin/bash -INTERFACE=mullvad +INTERFACE=mullvad # Set to name of VPN interface shopt -s nullglob +# Test whether gateway is connected to the outer world via VPN ping -q -I $INTERFACE 8.8.8.8 -c 4 -i 1 -W 5 >/dev/null 2>&1 if test $? -eq 0; then @@ -10,13 +11,27 @@ else NEW_STATE=off fi +# Iterate through network interfaces in sys file system for MESH in /sys/class/net/*/mesh; do +# Check whether gateway modus needs to be changed OLD_STATE="$(cat $MESH/gw_mode)" [ "$OLD_STATE" == "$NEW_STATE" ] && continue - echo $NEW_STATE > $MESH/gw_mode - echo 54MBit/54MBit > $MESH/gw_bandwidth - logger "batman gateway mode changed to $NEW_STATE" + echo $NEW_STATE > $MESH/gw_mode + echo 54MBit/54MBit > $MESH/gw_bandwidth + logger "batman gateway mode changed to $NEW_STATE" + + # Check whether gateway modus has been deactivated + if [ "$NEW_STATE" == "off" ]; then + # Shutdown DHCP server to prevent renewal of leases + service isc-dhcp-server stop + # Shutdown radvd daemon to prevent advertisment of server as gateway + service radvd stop + fi + + # Check whether gateway modus has been activated + if [ "$NEW_STATE" == "server" ]; then + # Restart DHCP server and radvd daemon + service isc-dhcp-server start + service radvd start + fi done - -# vim: noai:ts=4:sw=4:ff=unix:ft=text:fdm=marker -