#!/bin/bash

# additional macvlan interface for lxc

macvlan_test_config(){

    # check if all required configurations have been set
    # Source any configurable options
    test ! -r /etc/sysconfig/lxc_macvlan ||
            . /etc/sysconfig/lxc_macvlan

    # Tests for data provided in /etc/sysconfig/lxc_macvlan
    if [ -z "$MACVLAN_DEV" ]; then
        echo "MACVLAN_DEV not set is /etc/sysconfig/lxc_macvlan"
        exit 6
    fi

    if [ -z "$MACVLAN_NAME" ]; then
        echo "MACVLAN_NAME not set is /etc/sysconfig/lxc_macvlan"
        exit 6
    fi

    if [ -z "$MACVLAN_ADDRESS" ]; then
        echo "MACVLAN_ADDRESS not set is /etc/sysconfig/lxc_macvlan"
        exit 6
    fi
}

macvlan_gen_default_hwaddr(){
    # If not defined MACVLAN_HWADDRESS, calculate it from MACVLAN_ADDRESS
    echo $MACVLAN_ADDRESS | awk -F "/" '{print $1}' | awk -F "." '{ printf "00:16:3e:%x:%x:%x\n", $2, $3, $4 }'
}

macvlan_start() {
    echo "LXC macvlan interface start"
    macvlan_test_config

    set -e
    if [ -z "$MACVLAN_HWADDRESS" ]; then
        MACVLAN_HWADDRESS=`macvlan_gen_default_hwaddr`
    fi
    ip link add link $MACVLAN_DEV name $MACVLAN_NAME address $MACVLAN_HWADDRESS type macvlan mode bridge
    ip link set $MACVLAN_NAME up
    ip address add $MACVLAN_ADDRESS brd + dev $MACVLAN_NAME
}

macvlan_stop() {
    echo "LXC macvlan interface stop"
    macvlan_test_config

    set -e
    ip link set $MACVLAN_NAME down
    ip link del $MACVLAN_NAME
}

macvlan_status() {
    echo "LXC macvlan interface status"
    macvlan_test_config

    set -e
    ip addr show $MACVLAN_NAME
}