#!/bin/sh

_nhrp_config="/etc/opennhrp/opennhrp.conf"
_nhrp_ipsec="/etc/opennhrp/opennhrp.ipsec"
_strongswan_pid="/var/run/charon.pid"
_type="hub"

if ! grep "$NHRP_INTERFACE" $_nhrp_config | grep "hub"> /dev/null 2>&1; then
    _type="spoke"
fi

case $1 in
interface-up)
    ip route flush proto 42 dev $NHRP_INTERFACE
    ip neigh flush dev $NHRP_INTERFACE
    ;;
peer-register)
    ;;
peer-up)
    if [ -n "$NHRP_DESTMTU" ]; then
        ARGS=`ip route get $NHRP_DESTNBMA from $NHRP_SRCNBMA | head -1`
        ip route add $ARGS proto 42 mtu $NHRP_DESTMTU
    fi
    echo "Create link from $NHRP_SRCADDR ($NHRP_SRCNBMA) to $NHRP_DESTADDR ($NHRP_DESTNBMA)" | tee -a /tmp/opennhrp
    if [[ ( ${_type} == "spoke" ) && ( -e ${_strongswan_pid} ) ]]; then
        if grep "${NHRP_SRCADDR}" "${_nhrp_ipsec}"; then
                        echo "swanctl -t -S $NHRP_SRCNBMA -R $NHRP_DESTNBMA" >> /tmp/opennhrp
            swanctl -t -S $NHRP_SRCNBMA -R $NHRP_DESTNBMA >>/tmp/opennhrp 2>&1
                        echo "swanctl -i -c dmvpn -S $NHRP_SRCNBMA -R $NHRP_DESTNBMA" >> /tmp/opennhrp
                        swanctl -i -c dmvpn -S $NHRP_SRCNBMA -R $NHRP_DESTNBMA  >>/tmp/opennhrp 2>&1
                        rc=$?
                        if [[ $rc -gt 0 ]]; then
                          echo "Exited with returncode: $rc, adding peer aborted" >> /tmp/opennhrp
                          exit 1;
                        fi
                        echo "done" >> /tmp/opennhrp
        fi
    fi
    ;;
peer-down)
    echo "Delete link from $NHRP_SRCADDR ($NHRP_SRCNBMA) to $NHRP_DESTADDR ($NHRP_DESTNBMA)"
    if [[ ( ${_type} == "spoke" ) && ( -e ${_strongswan_pid} ) ]]; then
        swanctl -t -S $NHRP_SRCNBMA -R $NHRP_DESTNBMA || exit 1
    fi
    ip route del $NHRP_DESTNBMA src $NHRP_SRCNBMA proto 42
    ;;
route-up)
    echo "Route $NHRP_DESTADDR/$NHRP_DESTPREFIX is up"
    ip route replace $NHRP_DESTADDR/$NHRP_DESTPREFIX proto 42 via $NHRP_NEXTHOP dev $NHRP_INTERFACE
    ip route flush cache
    ;;
route-down)
    echo "Route $NHRP_DESTADDR/$NHRP_DESTPREFIX is down"
    ip route del $NHRP_DESTADDR/$NHRP_DESTPREFIX proto 42
    ip route flush cache
    ;;
esac

exit 0