#! /bin/bash
. /usr/lib/network/network

tunnel_up() {
    load_profile "$1"

    if [ -e /sys/class/net/$INTERFACE ]; then
        report_fail "Interface $INTERFACE already exists."
        exit 1
    else
        ip tunnel add "$INTERFACE" mode "$MODE" \
            remote "$REMOTE" local "$LOCAL" ttl "$TTL" &>/dev/null
    fi
    bring_interface up "$INTERFACE"

    case "$IP" in
    static)
        if [[ -n "$ADDR" ]]; then
            [[ -z $NETMASK ]] && NETMASK=24
            report_debug tunnel_up ip addr add "$ADDR/$NETMASK" brd + dev "$INTERFACE" 
            if ! ip addr add "$ADDR/$NETMASK" brd + dev "$INTERFACE"; then
                report_iproute "Could not configure interface"
            fi
        fi
        if [[ -n "$IFOPTS" ]]; then
            if ! ifconfig "$INTERFACE" $IFOPTS up; then
                report_iproute "Bringing interface up failed."
                return 1
            fi
        fi
        if [[ -n "$ROUTES" ]]; then
            for route in "${ROUTES[@]}"; do
                report_debug tunnel_up ip route add $route dev "$INTERFACE"
                if ! ip route add $route dev "$INTERFACE" ; then
                    report_iproute "Adding route '$route' failed"
                fi
            done
        fi
        if [[ -n "$GATEWAY" ]]; then
            report_debug tunnel_up ip route add default via "$GATEWAY" dev "$INTERFACE"
            if ! ip route add default via "$GATEWAY" dev "$INTERFACE"; then
                report_iproute "Adding gateway $GATEWAY failed"
            fi
        fi
        ;;
    ""|no)
        ;;
      *)
        report_iproute "IP must be either 'static' or 'no'"
        ;;
    esac

    if [[ -n "$IPCFG" ]]; then
        for line in "${IPCFG[@]}"; do

            report_debug tunnel_up ip "$line"
            if ! ip $line; then
                report_iproute "Could not configure interface ($line)."
            fi
        done
    fi

    # Load ipv6 module if necessary (FS#25530)
    case "$IP6" in
    stateless|static)
        [ -d "/proc/sys/net/ipv6" ] || modprobe ipv6
        ;;
    ""|no)
        [ -d /proc/sys/net/ipv6 ] && sysctl -q -w net.ipv6.conf.$INTERFACE.accept_ra=0
        ;;
    *)
        report_iproute "IP6 must be 'stateless', 'static' or 'no'"
        ;;
    esac

    case "$IP6" in
    stateless)
        sysctl -q -w net.ipv6.conf.$INTERFACE.accept_ra=1
        ;;
    static)
        sysctl -q -w net.ipv6.conf.$INTERFACE.accept_ra=0
        if [[ -n "$ADDR6" ]]; then
            for addr in "${ADDR6[@]}"; do
                report_debug tunnel_up ip -6 addr add "$addr" dev "$INTERFACE"
                if ! ip -6 addr add "$addr" dev "$INTERFACE"; then
                    report_iproute "Could not add address $addr to interface"
                fi
            done
        fi
        if [[ -n "$GATEWAY6" ]]; then
            report_debug tunnel_up ip -6 route add default via "$GATEWAY6" dev "$INTERFACE"
            if ! ip -6 route add default via "$GATEWAY6" dev "$INTERFACE"; then
                report_iproute "Adding gateway $GATEWAY6 failed"
            fi
        fi

        # Add static IPv6 routes
        if [[ -n "$ROUTES6" ]]; then
            for route in "${ROUTES6[@]}"; do
            report_debug tunnel_up ip -6 route add $route dev $INTERFACE
                if ! ip -6 route add $route dev $INTERFACE ; then
                    report_iproute "Adding route '$route' failed"
                fi
            done
        fi
        ;;
    esac

    return 0
}

tunnel_down() {
    load_profile "$1"

    bring_interface down "$INTERFACE"
    ip tunnel del "$INTERFACE" mode "$MODE" \
        remote "$REMOTE" local "$LOCAL" ttl "$TTL" &>/dev/null
    return 0
}

tunnel_status() {
    if [ -e /sys/class/net/$INTERFACE ]; then
        return 0
    else
        return 1
    fi
}

tunnel_$1 "$2"
exit $?
# vim: set ts=4 et sw=4 tw=0: