nilsandClaude Sonnet 5.5
406196adce
- wireguard.<n>.sourceAddresses: source for router-originated traffic into a tunnel without an address of its own (PreferredSource on the routes); checked at build time. - examples/home: antigua's routing role ported to the router module (PPPoE with IPv6 inside the session, LAN with ULA and reservation, local DNS and forward zones, the freifunk/family/mobile tunnels with explicit zone rules, ddclient following the PPP device). nixosConfigurations.home, packages.installer-home and a flake check that builds it. - PLAN.md: the remaining antigua gaps and the open question about services that stay behind the router. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
84 lines
2.7 KiB
Nix
84 lines
2.7 KiB
Nix
{ config, lib, ... }:
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let
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cfg = config.router;
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# systemd-networkd runs unprivileged and could not read root-only key files.
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# LoadCredential= makes systemd read them as root and hand networkd a copy
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# in its credentials directory, so the files can stay 0600 root.
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credDir = "/run/credentials/systemd-networkd.service";
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keyCred = name: "wg-${name}-key";
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pskCred = name: peer: "wg-${name}-${peer}-psk";
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credentials = lib.concatLists (
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lib.mapAttrsToList (
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name: wg:
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[ "${keyCred name}:${toString wg.privateKeyFile}" ]
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++ lib.concatLists (
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lib.mapAttrsToList (
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peer: p:
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lib.optional (p.presharedKeyFile != null) "${pskCred name peer}:${toString p.presharedKeyFile}"
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) wg.peers
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)
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) cfg.wireguard
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);
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in
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{
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config = lib.mkIf (cfg.enable && cfg.wireguard != { }) {
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systemd.network.netdevs = lib.mapAttrs' (
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name: wg:
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lib.nameValuePair "30-wg-${name}" {
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netdevConfig = {
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Kind = "wireguard";
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Name = wg.interface;
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}
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// lib.optionalAttrs (wg.mtu != null) { MTUBytes = wg.mtu; };
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wireguardConfig = {
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PrivateKeyFile = "${credDir}/${keyCred name}";
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}
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// lib.optionalAttrs (wg.listenPort != null) { ListenPort = wg.listenPort; };
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wireguardPeers = lib.mapAttrsToList (
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peer: p:
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{
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PublicKey = p.publicKey;
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AllowedIPs = p.allowedIPs;
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}
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// lib.optionalAttrs (p.endpoint != null) { Endpoint = p.endpoint; }
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// lib.optionalAttrs (p.persistentKeepalive != null) {
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PersistentKeepalive = p.persistentKeepalive;
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}
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// lib.optionalAttrs (p.presharedKeyFile != null) {
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PresharedKeyFile = "${credDir}/${pskCred name peer}";
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}
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) wg.peers;
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}
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) cfg.wireguard;
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systemd.services.systemd-networkd.serviceConfig.LoadCredential = credentials;
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systemd.network.networks = lib.mapAttrs' (
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name: wg:
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lib.nameValuePair "30-wg-${name}" {
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matchConfig.Name = wg.interface;
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address = wg.addresses;
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networkConfig = {
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ConfigureWithoutCarrier = true;
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IPv6AcceptRA = false;
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};
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# Cryptokey routing: a peer's allowedIPs are the destinations sent into the tunnel.
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routes = lib.concatMap (
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p:
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map (
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ip:
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let
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sameFamily = lib.filter (s: lib.hasInfix ":" s == lib.hasInfix ":" ip) wg.sourceAddresses;
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in
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{
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Destination = ip;
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}
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// lib.optionalAttrs (sameFamily != [ ]) { PreferredSource = builtins.head sameFamily; }
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) p.allowedIPs
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) (lib.attrValues wg.peers);
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}
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) cfg.wireguard;
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};
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}
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