#!/bin/sh
#
# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"). You may
# not use this file except in compliance with the License. A copy of the
# License is located at
#
#      http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file is distributed
# on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
# express or implied. See the License for the specific language governing
# permissions and limitations under the License.

set -e

# summary of how this script can be called:
#        * <postinst> `configure' <most-recently-configured-version>
#        * <old-postinst> `abort-upgrade' <new version>
#        * <conflictor's-postinst> `abort-remove' `in-favour' <package>
#          <new-version>
#        * <postinst> `abort-remove'
#        * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
#          <failed-install-package> <version> `removing'
#          <conflicting-package> <version>
# for details, see https://www.debian.org/doc/debian-policy/ or
# the debian-policy package


setup_policy_routes() {
    local iface node
    for node in /sys/class/net/*; do
        iface=$(basename $node)
        unset ID_NET_DRIVER
        eval $(udevadm info --export --query=property /sys/class/net/$iface)
        case $ID_NET_DRIVER in
            ena|ixgbevf|vif)
                systemctl start policy-routes@${iface}.service
                systemctl start refresh-policy-routes@${iface}.timer
                ;;
            *)
                echo "Skipping $iface with driver $ID_NET_DRIVER"
                ;;
        esac
    done
}

case "$1" in
    configure)
        systemctl enable systemd-networkd.service
        systemctl enable systemd-resolved.service
        [ -f /etc/resolv.conf ] && mv /etc/resolv.conf /etc/resolv.conf.old
        ln -sf /run/systemd/resolve/resolv.conf /etc/resolv.conf

        if [ -d /run/systemd/system ]; then
            if [ command -v ifdown > /dev/null 2>&1 ]; then
                # If we're migrating from ifupdown, we'll restart the interfaces:
                ifdown --all
            fi
            systemctl start systemd-networkd.service
            setup_policy_routes
            systemctl start systemd-resolved.service
        fi
        ;;

    abort-upgrade|abort-remove|abort-deconfigure)
        ;;

    *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 1
        ;;
esac

# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.

#DEBHELPER#

exit 0