#!/bin/sh

# vlan-network-interface - configure a network bridge
#
# This service checks whether a physical network device that has been added
# has VLAN defined in /etc/network/interfaces that should be brought up
set -e

if [ -z "$INTERFACE" ]; then
    echo "missing \$INTERFACE" >&2
    exit 1
fi

if ! which ifquery >/dev/null; then
    exit 0
fi

if [ ! -x /etc/network/if-pre-up.d/vlan ]; then
    exit 0
fi

mkdir -p /run/network
for IFACE in $(ifquery --list --allow auto); do
    IF_VLAN_RAW_DEVICE=$(ifquery $IFACE | sed -n -e's/^vlan[_-]raw[_-]device: //p')

    # If there is no vlan-raw-device defined, check for vlan-formatted name
    # for example, eth1.123
    if [ -z "$IF_VLAN_RAW_DEVICE" ]; then
        IF_VLAN_RAW_DEVICE=${IFACE%%.*}
        [ "$IFACE" = "$IF_VLAN_RAW_DEVICE" ] && continue
    fi

    # Check if this (vlan) $IFACE uses raw-device $INTERFACE
    [ "$IF_VLAN_RAW_DEVICE" != "$INTERFACE" ] && continue

    # If we're being called directly from udev, we only want to create the
    # vlan interface if there is no associated ifupdown config for the
    # raw-device; otherwise the ifup for the raw-device will create the
    # vlan interface(s)
    [ "$1" = "UDEV" ] && ifquery $IF_VLAN_RAW_DEVICE && continue

    # Create the VLAN interface(s) related to the raw-device interface
    export IFACE IF_VLAN_RAW_DEVICE
    /etc/network/if-pre-up.d/vlan
done