merlinwrt-ssid-if-specific/aiop/aiop-openvpn

#!/bin/sh
source /jffs/scripts/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
        if [ `ip route show table "${RTABLE}" | grep -ice "${ROUTE}"` -eq 0 ]; then
            cmd_run "ip-route" "ip route add table ${RTABLE} ${ROUTE}"
        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}"
    cmd_run "ip-rule" "ip rule flush table ${RTABLE}"

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