#!/bin/sh
source /jffs/scripts/aiop/aiop-func

route_vpn () {
    IFACE="${1}"
    IFACE_TUN="${2}"

    if [ `ifconfig ${IFACE_TUN} 2&> /dev/null | grep -ice "UP"` -ne 1 ]; then
        logger "openvpn: ${IFACE_TUN} not UP"
        return
    fi

    if [ `ifconfig ${IFACE} 2&> /dev/null | grep -ice "UP"` -ne 1 ]; then
        logger "dnsmasq-dhcp: Unknown interface ${IFACE}."
        return
    fi

    IFACE_INET_ADDR="$(ifconfig "${IFACE}" | sed -ne's/.*inet addr:\([^ ]*\).*$/\1/p')"
    IFACE_NWRK_ADDR="${IFACE_INET_ADDR%.*}.0"
    RTABLE=`echo ${IFACE_TUN} | sed -E 's/([a-z]+)([0-9]+).*/\2/'`

    CIDR=24
    if [ $# -eq 3 ]; then
        CIDR="${3}"
    fi

    ip route show table main | grep -Ev ^default | while read ROUTE; do
        # Remote interface != ${IFACE_TUN} && != ${IFACE} entries from this table.
        if [ $(echo "${ROUTE}" | grep -ice "tun") -eq 0 ] || [ $(echo "${ROUTE}" | grep -ice "${IFACE_TUN}") -ne 0 ]; then
            if [ $(echo "${ROUTE}" | grep -icE "wl[0-9]\.[0-9]") -eq 0 ] || [ $(echo "${ROUTE}" | grep -ice "${IFACE}") -ne 0 ]; then
                cmd_run "ip-route" "ip route add table ${RTABLE} ${ROUTE}" "-nolog"
            fi
        fi
    done
    
    cmd_run "ip-route" "ip route add default dev ${IFACE_TUN} table ${RTABLE}"
    cmd_run "ip-rule" "ip rule add dev ${IFACE} table ${RTABLE}"
    cmd_run "ip-route" "ip route flush cache"
    
    iptable "${IFACE}" "I" "FORWARD" "ACCEPT" "${IFACE_TUN}"
    iptable "${IFACE_TUN}" "I" "${IFACE_NWRK_ADDR}/${CIDR}"
}

unroute_vpn () {
    IFACE="${1}"
    IFACE_TUN="${2}"

    if [ `ifconfig ${IFACE} 2&> /dev/null | grep -ice "UP"` -ne 1 ]; then
        logger "dnsmasq-dhcp: Unknown interface ${IFACE}."
        return
    fi

    IFACE_INET_ADDR="$(ifconfig "${IFACE}" | sed -ne's/.*inet addr:\([^ ]*\).*$/\1/p')"
    IFACE_NWRK_ADDR="${IFACE_INET_ADDR%.*}.0"
    RTABLE=`echo ${IFACE_TUN} | sed -E 's/([a-z]+)([0-9]+).*/\2/'`

    CIDR=24
    if [ $# -eq 3 ]; then
        CIDR="${3}"
    fi

    cmd_run "ip-route" "ip route flush table ${RTABLE}" "-nolog"

    iptable "${IFACE}" "D" "FORWARD" "ACCEPT" "${IFACE_TUN}"
    iptable "${IFACE_TUN}" "D" "${IFACE_NWRK_ADDR}/${CIDR}"
}