83 lines
2.4 KiB
Nix
83 lines
2.4 KiB
Nix
{
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config,
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pkgs,
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lib,
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cfg,
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...
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}: let
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prefix = "lyn";
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# decrypt gossip secret
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# change this to comply with you secret management
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gossip_secret_path = config.sops.secrets."all/meshnetwork/gossip_secret".path;
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# function to make a peerlist suitable for wgautomesh
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buildPeerlist = version: hosts: let
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#filter out hosts that have wg.enabled set to false
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wgEnabledHosts = lib.filterAttrs (_: host: host.wg.enabled or false) hosts;
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#filter out hosts that don't support IP{$version}
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filteredHosts = lib.filterAttrs (_: host: host.${version} != null) wgEnabledHosts;
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in
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lib.mapAttrsToList (name: host: {
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pubkey = host.wg.pubkey;
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#if there is no public IP, make endpoint null so wgautomesh knows it unknown
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endpoint =
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if host.${version}.public == ""
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then null
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else "${host.${version}.public}:${toString host.wg.port}";
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address = host.${version}.internal;
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})
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filteredHosts;
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# helper vars to prettify
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meshnetwork = config.${prefix}.network;
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currentHost = meshnetwork.hosts.${config.networking.hostName};
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wireguardPort = currentHost.wg.port;
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in {
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opt.useIPv6 = lib.mkOption {
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type = lib.types.bool;
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description = "Whether to use IPv6. Defaults to true";
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default = true;
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};
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config = {
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networking.firewall = {
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allowedUDPPorts = [
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wireguardPort
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];
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extraCommands = ''
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# Allow UDP packets comming from port 1900 from a local address,
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# these are necessary for UPnP/IGD
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iptables -A INPUT -s 192.168.0.0/16 -p udp --sport 1900 -j ACCEPT
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'';
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extraStopCommands = ''
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iptables -D INPUT -s 192.168.0.0/16 -p udp --sport 1900 -j ACCEPT
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'';
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};
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networking.wireguard.interfaces.wg0 = {
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ips =
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if cfg.useIPv6
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then ["${currentHost.IPv6}/64"]
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else ["${currentHost.IPv4}/24"];
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listenPort = wireguardPort;
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privateKeyFile = "/var/lib/wireguard-keys/private";
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mtu = 1200;
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};
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services.wgautomesh = {
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enable = true;
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settings = {
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interface = "wg0";
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peers =
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if cfg.useIPv6
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then buildPeerlist "IPv6" meshnetwork.hosts
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else buildPeerlist "IPv4" meshnetwork.hosts;
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upnp_forward_external_port = wireguardPort;
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};
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gossipSecretFile = gossip_secret_path;
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#DEBUG
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logLevel = "trace";
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};
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};
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}
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