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#!/usr/bin/ruby
require 'fileutils'
HOSTS = {
f0: { lan: { domain: 'lan.buetow.org', ip: '192.168.1.130' },
wg0: { domain: 'wg0.buetow.org', ip: '192.168.2.130' } },
f1: { lan: { domain: 'lan.buetow.org', ip: '192.168.1.131' },
wg0: { domain: 'wg0.buetow.org', ip: '192.168.2.131' } },
f2: { lan: { domain: 'lan.buetow.org', ip: '192.168.1.132' },
wg0: { domain: 'wg0.buetow.org', ip: '192.168.2.132' } },
r0: { lan: { domain: 'lan.buetow.org', ip: '192.168.1.120' },
wg0: { domain: 'wg0.buetow.org', ip: '192.168.2.120' } },
r1: { lan: { domain: 'lan.buetow.org', ip: '192.168.1.121' },
wg0: { domain: 'wg0.buetow.org', ip: '192.168.2.121' } },
r2: { lan: { domain: 'lan.buetow.org', ip: '192.168.1.122' },
wg0: { domain: 'wg0.buetow.org', ip: '192.168.2.122' } }
}.freeze
PeerSnippet = Struct.new(:description, :public_key, :preshared_key, :allowed_ips) do
def to_s
<<~PEER_CONFIG
[Peer]
# #{description}
PublicKey = #{public_key}
PresharedKey = #{preshared_key}
AllowedIPs = #{allowed_ips}
PEER_CONFIG
end
end
WireguardConfig = Struct.new(:myself, :hosts) do
def to_s
peers = hosts.map do |name, data|
PeerSnippet.new("#{name}.#{data[:wg0][:domain]}",
:PUB_KEY, :PRESHARED_KEY, "#{data[:wg0][:ip]}/32")
end
<<~CONFIG
[Interface]
Address = #{hosts[myself][:wg0][:ip]}
PrivateKey = #{private_key}
#{peers.map(&:to_s).join("\n")}
CONFIG
end
private
def private_key = 'PRIVATE_KEY'
end
HOSTS.each_key do |name|
config_dir = "dist/#{name}/etc/wireguard"
config_path = "#{config_dir}/wg0.conf"
FileUtils.mkdir_p(config_dir) unless Dir.exist?(config_dir)
wg0 = WireguardConfig.new(name, HOSTS)
puts "Generating config for #{name} at #{config_path}"
File.write(config_path, wg0.to_s)
end
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