105 lines
3.8 KiB
Nix
105 lines
3.8 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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inherit (lib) mkEnableOption mkIf mkOption optionalString types;
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generic = variant:
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let
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cfg = config.services.${variant};
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pkg = pkgs.${variant};
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birdBin = if variant == "bird6" then "bird6" else "bird";
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birdc = if variant == "bird6" then "birdc6" else "birdc";
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descr =
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{ bird = "1.6.x with IPv4 support";
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bird6 = "1.6.x with IPv6 support";
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bird2 = "2.x";
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}.${variant};
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in {
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###### interface
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options = {
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services.${variant} = {
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enable = mkEnableOption "BIRD Internet Routing Daemon (${descr})";
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config = mkOption {
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type = types.lines;
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description = ''
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BIRD Internet Routing Daemon configuration file.
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<link xlink:href='http://bird.network.cz/'/>
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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 the config should be checked at build time.
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When the config can't be checked during build time, for example when it includes
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other files, either disable this option or use <code>preCheckConfig</code> to create
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the included files before checking.
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'';
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};
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preCheckConfig = mkOption {
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type = types.lines;
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default = "";
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example = ''
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echo "cost 100;" > include.conf
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'';
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description = ''
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Commands to execute before the config file check. The file to be checked will be
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available as <code>${variant}.conf</code> in the current directory.
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Files created with this option will not be available at service runtime, only during
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build time checking.
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'';
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};
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};
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};
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###### implementation
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config = mkIf cfg.enable {
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environment.systemPackages = [ pkg ];
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environment.etc."bird/${variant}.conf".source = pkgs.writeTextFile {
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name = "${variant}.conf";
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text = cfg.config;
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checkPhase = optionalString cfg.checkConfig ''
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ln -s $out ${variant}.conf
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${cfg.preCheckConfig}
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${pkg}/bin/${birdBin} -d -p -c ${variant}.conf
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'';
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};
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systemd.services.${variant} = {
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description = "BIRD Internet Routing Daemon (${descr})";
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wantedBy = [ "multi-user.target" ];
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reloadIfChanged = true;
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restartTriggers = [ config.environment.etc."bird/${variant}.conf".source ];
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serviceConfig = {
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Type = "forking";
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Restart = "on-failure";
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ExecStart = "${pkg}/bin/${birdBin} -c /etc/bird/${variant}.conf -u ${variant} -g ${variant}";
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ExecReload = "/bin/sh -c '${pkg}/bin/${birdBin} -c /etc/bird/${variant}.conf -p && ${pkg}/bin/${birdc} configure'";
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ExecStop = "${pkg}/bin/${birdc} down";
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CapabilityBoundingSet = [ "CAP_CHOWN" "CAP_FOWNER" "CAP_DAC_OVERRIDE" "CAP_SETUID" "CAP_SETGID"
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# see bird/sysdep/linux/syspriv.h
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"CAP_NET_BIND_SERVICE" "CAP_NET_BROADCAST" "CAP_NET_ADMIN" "CAP_NET_RAW" ];
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ProtectSystem = "full";
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ProtectHome = "yes";
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SystemCallFilter="~@cpu-emulation @debug @keyring @module @mount @obsolete @raw-io";
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MemoryDenyWriteExecute = "yes";
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};
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};
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users = {
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users.${variant} = {
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description = "BIRD Internet Routing Daemon user";
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group = variant;
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isSystemUser = true;
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};
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groups.${variant} = {};
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};
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};
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};
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in
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{
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imports = map generic [ "bird" "bird6" "bird2" ];
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}
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