a9c15dd2ff
in case the vpn is offline, also shutdown radvd and dhcpd so that clients get a new default gateway when their lease time expires
37 lines
1.1 KiB
Bash
37 lines
1.1 KiB
Bash
#!/bin/bash
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INTERFACE=mullvad # Set to name of VPN interface
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shopt -s nullglob
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# Test whether gateway is connected to the outer world via VPN
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ping -q -I $INTERFACE 8.8.8.8 -c 4 -i 1 -W 5 >/dev/null 2>&1
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if test $? -eq 0; then
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NEW_STATE=server
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else
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NEW_STATE=off
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fi
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# Iterate through network interfaces in sys file system
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for MESH in /sys/class/net/*/mesh; do
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# Check whether gateway modus needs to be changed
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OLD_STATE="$(cat $MESH/gw_mode)"
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[ "$OLD_STATE" == "$NEW_STATE" ] && continue
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echo $NEW_STATE > $MESH/gw_mode
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echo 54MBit/54MBit > $MESH/gw_bandwidth
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logger "batman gateway mode changed to $NEW_STATE"
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# Check whether gateway modus has been deactivated
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if [ "$NEW_STATE" == "off" ]; then
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# Shutdown DHCP server to prevent renewal of leases
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service isc-dhcp-server stop
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# Shutdown radvd daemon to prevent advertisment of server as gateway
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service radvd stop
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fi
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# Check whether gateway modus has been activated
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if [ "$NEW_STATE" == "server" ]; then
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# Restart DHCP server and radvd daemon
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service isc-dhcp-server start
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service radvd start
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fi
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done
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