#!/bin/bash -e

default_routev4=$(ip route list | grep -F 'default')

interface=$(echo "$default_routev4" | perl -pe 's#^.* dev (\w+) .*$#$1#')
macaddress=$(ip address show dev "$interface" | grep -F 'link/ether' | perl -pe 's#^.*link/ether ([a-z0-9:]*) brd .+$#$1#')

addresses=$(ip address show dev "$interface" scope global)

gatewayv4=$(echo "$default_routev4" | perl -pe 's#^.* via ([\d.]+) .*$#$1#')
addressv4=$(echo "$addresses" | grep -F 'inet ' | perl -pe 's#^.* inet ([\d.]+).*#$1#')

addressv6=$(echo "$addresses" | grep -F 'inet6 ' | perl -pe 's#^.* inet6 ([a-z0-9:]+)::[a-z0-9]+.*$#$1#')


echo "[Match]
MACAddress=${macaddress}
Type=ether

[Network]
Gateway=fe80::1
Gateway=${gatewayv4}

[Address]
Address=${addressv6}::1337/64

[Address]
Address=${addressv4}/32
Peer=${gatewayv4}/32

[Network]
VLAN=ingress
VLAN=kubernetes" > "/etc/systemd/network/egress.network"

echo "[NetDev]
Name=ingress
Kind=vlan
MTUBytes=1400

[VLAN]
Id=4000" > "/etc/systemd/network/ingress.netdev"

echo "[Match]
Name=ingress

[Network]
Description=\"ingress\"

[Route]
Gateway=2a01:4f8:fff0:a5::1
Table=4000

[Route]
Gateway=157.90.103.81
Table=4000

[RoutingPolicyRule]
From=2a01:4f8:fff0:a5::/64
Table=4000

[RoutingPolicyRule]
From=157.90.103.80/28
Table=4000

[RoutingPolicyRule]
To=2a01:4f8:fff0:a5::/64
Table=4000

[RoutingPolicyRule]
To=157.90.103.80/28
Table=4000" > "/etc/systemd/network/ingress.network"

echo "[NetDev]
Name=kubernetes
Kind=vlan
MTUBytes=1400

[VLAN]
Id=4010" > "/etc/systemd/network/kubernetes.netdev"

echo "[Match]
Name=kubernetes

[Network]
Description=\"kubernetes\"
Address=10.73.19.fixme/24
Address=fdad:73ce:19db::fixme/48" > "/etc/systemd/network/kubernetes.network"