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gre.sh

#!/bin/sh
# for FreeBSD
REMOTE_IPV4=<PEER_IPV4_ADDRESS>
LOCAL_IPV4=<YOUR_LOCAL_IPV4_ADDRESS>
REMOTE_IPV6=<PEER_TUNNEL_IF_IPV6_ADDRESS>
LOCAL_IPV6=<YOUR_TUNNEL_IF_IPV6_ADDRESS>
TUN=gre0 # fixme

case "$@" in
start)
        ifconfig $TUN create
        ifconfig $TUN tunnel $LOCAL_IPV4 $REMOTE_IPV4 link0
        ifconfig $TUN inet6 $LOCAL_IPV6/64
        ifconfig $TUN up
        ;;
stop)
        ifconfig $TUN destroy
        ;;
show)
        ifconfig
        ;;
ping)
        ping6 -I $TUN $REMOTE_IPV6
        ;;
*)
        echo "$0 [start|stop|show|ping]"
esac

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