141 lines
3.8 KiB
Nix
141 lines
3.8 KiB
Nix
# NixOS module for hans, ip over icmp daemon
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{ config, lib, pkgs, ... }:
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let
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cfg = config.services.hans;
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hansUser = "hans";
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in
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{
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### configuration
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options = {
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services.hans = {
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clients = lib.mkOption {
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default = {};
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description = ''
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Each attribute of this option defines a systemd service that
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runs hans. Many or none may be defined.
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The name of each service is
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`hans-«name»`
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where «name» is the name of the
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corresponding attribute name.
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'';
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example = lib.literalExpression ''
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{
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foo = {
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server = "192.0.2.1";
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extraConfig = "-v";
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}
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}
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'';
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type = lib.types.attrsOf (lib.types.submodule (
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{
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options = {
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server = lib.mkOption {
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type = lib.types.str;
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default = "";
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description = "IP address of server running hans";
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example = "192.0.2.1";
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};
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extraConfig = lib.mkOption {
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type = lib.types.str;
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default = "";
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description = "Additional command line parameters";
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example = "-v";
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};
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passwordFile = lib.mkOption {
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type = lib.types.str;
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default = "";
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description = "File that contains password";
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};
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};
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}));
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};
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server = {
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enable = lib.mkOption {
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type = lib.types.bool;
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default = false;
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description = "enable hans server";
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};
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ip = lib.mkOption {
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type = lib.types.str;
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default = "";
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description = "The assigned ip range";
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example = "198.51.100.0";
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};
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respondToSystemPings = lib.mkOption {
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type = lib.types.bool;
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default = false;
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description = "Force hans respond to ordinary pings";
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};
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extraConfig = lib.mkOption {
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type = lib.types.str;
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default = "";
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description = "Additional command line parameters";
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example = "-v";
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};
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passwordFile = lib.mkOption {
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type = lib.types.str;
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default = "";
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description = "File that contains password";
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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 = lib.mkIf (cfg.server.enable || cfg.clients != {}) {
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boot.kernel.sysctl = lib.optionalAttrs cfg.server.respondToSystemPings {
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"net.ipv4.icmp_echo_ignore_all" = 1;
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};
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boot.kernelModules = [ "tun" ];
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systemd.services =
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let
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createHansClientService = name: cfg:
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{
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description = "hans client - ${name}";
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after = [ "network.target" ];
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wantedBy = [ "multi-user.target" ];
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script = "${pkgs.hans}/bin/hans -f -u ${hansUser} ${cfg.extraConfig} -c ${cfg.server} ${lib.optionalString (cfg.passwordFile != "") "-p $(cat \"${cfg.passwordFile}\")"}";
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serviceConfig = {
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RestartSec = "30s";
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Restart = "always";
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};
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};
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in
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lib.listToAttrs (
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lib.mapAttrsToList
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(name: value: lib.nameValuePair "hans-${name}" (createHansClientService name value))
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cfg.clients
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) // {
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hans = lib.mkIf (cfg.server.enable) {
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description = "hans, ip over icmp server daemon";
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after = [ "network.target" ];
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wantedBy = [ "multi-user.target" ];
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script = "${pkgs.hans}/bin/hans -f -u ${hansUser} ${cfg.server.extraConfig} -s ${cfg.server.ip} ${lib.optionalString cfg.server.respondToSystemPings "-r"} ${lib.optionalString (cfg.server.passwordFile != "") "-p $(cat \"${cfg.server.passwordFile}\")"}";
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};
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};
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users.users.${hansUser} = {
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description = "Hans daemon user";
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isSystemUser = true;
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};
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};
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meta.maintainers = [ ];
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}
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