130 lines
3.3 KiB
Nix
130 lines
3.3 KiB
Nix
# Portions of this file are sourced from
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# https://github.com/NickCao/flakes/blob/3b03efb676ea602575c916b2b8bc9d9cd13b0d85/modules/gravity/default.nix
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{
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config,
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lib,
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pkgs,
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mylib,
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...
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}:
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with lib;
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let
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cfg = config.services.enthalpy;
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in
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{
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options.services.enthalpy.bird = {
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enable = mkEnableOption "bird for site-scope connectivity";
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socket = mkOption {
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type = types.str;
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default = "/run/enthalpy/bird/bird.ctl";
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description = ''
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Path to the bird control socket.
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'';
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};
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config = mkOption {
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type = types.lines;
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description = ''
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Configuration file for bird.
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'';
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};
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checkConfig = mkOption {
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type = types.bool;
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default = true;
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description = ''
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Whether to check the config at build time.
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'';
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};
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routerId = mkOption {
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type = types.int;
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description = ''
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Router ID for the bird instance.
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'';
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};
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};
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config = mkIf (cfg.enable && cfg.bird.enable) {
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environment.etc."enthalpy/bird/bird.conf".source = pkgs.writeTextFile {
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name = "bird";
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text = cfg.bird.config;
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checkPhase = optionalString cfg.bird.checkConfig ''
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ln -s $out bird.conf
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${pkgs.buildPackages.bird}/bin/bird -d -p -c bird.conf
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'';
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};
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systemd.services.enthalpy-bird = {
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serviceConfig =
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mylib.misc.serviceHardened
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// config.networking.netns.enthalpy.serviceConfig
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// {
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Type = "forking";
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Restart = "on-failure";
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RestartSec = 5;
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DynamicUser = true;
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RuntimeDirectory = "enthalpy/bird";
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ExecStart = "${pkgs.bird}/bin/bird -s ${cfg.bird.socket} -c /etc/enthalpy/bird/bird.conf";
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ExecReload = "${pkgs.bird}/bin/birdc -s ${cfg.bird.socket} configure";
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ExecStop = "${pkgs.bird}/bin/birdc -s ${cfg.bird.socket} down";
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CapabilityBoundingSet = [
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"CAP_NET_ADMIN"
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"CAP_NET_BIND_SERVICE"
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"CAP_NET_RAW"
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];
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AmbientCapabilities = [
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"CAP_NET_ADMIN"
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"CAP_NET_BIND_SERVICE"
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"CAP_NET_RAW"
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];
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RestrictAddressFamilies = [
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"AF_UNIX"
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"AF_INET"
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"AF_INET6"
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"AF_NETLINK"
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];
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};
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after = [ "netns-enthalpy.service" ];
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partOf = [ "netns-enthalpy.service" ];
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wantedBy = [
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"multi-user.target"
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"netns-enthalpy.service"
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];
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reloadTriggers = [ config.environment.etc."enthalpy/bird/bird.conf".source ];
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};
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services.enthalpy.bird.config = mkBefore ''
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router id ${toString cfg.bird.routerId};
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ipv6 sadr table sadr6;
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protocol device {
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scan time 5;
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}
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protocol kernel {
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ipv6 sadr {
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export all;
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import none;
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};
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metric 512;
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}
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protocol static {
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ipv6 sadr;
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route ${cfg.prefix} from ::/0 unreachable;
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route ${cfg.network} from ::/0 unreachable;
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};
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protocol babel {
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ipv6 sadr {
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export all;
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import all;
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};
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randomize router id;
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interface "enta*" {
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type tunnel;
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rxcost 32;
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hello interval 20 s;
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rtt cost 1024;
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rtt max 1024 ms;
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rx buffer 2000;
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};
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}
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'';
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};
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}
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