89 lines
2.4 KiB
Nix
89 lines
2.4 KiB
Nix
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{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.clerie.gre-tunnel;
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generateInterfaceUnit = isIPv6: (name: tunnel:
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nameValuePair "gre-tunnel-${name}" {
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description = "GRE Tunnel - ${name}";
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requires = [ "network-online.target" ];
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after = [ "network.target" "network-online.target" ];
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wantedBy = [ "multi-user.target" ];
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environment.DEVICE = name;
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path = with pkgs; [ iproute ];
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serviceConfig = {
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Type = "oneshot";
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RemainAfterExit = true;
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};
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script = ''
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${tunnel.preSetup}
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ip${optionalString isIPv6 " -6"} tunnel add ${name} mode ${optionalString isIPv6 "ip6"}gre remote ${tunnel.remote} local ${tunnel.local}
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ip link set ${name} up
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ip${optionalString isIPv6 " -6"} a add ${tunnel.address} dev ${name}
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${tunnel.postSetup}
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'';
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postStop = ''
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ip link set ${name} down
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ip tunnel del ${name}
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${tunnel.postShutdown}
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'';
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});
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checkOpts = { config, ... }@moduleAttrs: {
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options = {
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remote = mkOption {
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type = types.str;
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description = "Address of reciever.";
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};
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local = mkOption {
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type = types.str;
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description = "Address our packets originate from.";
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};
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address = mkOption {
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type = types.str;
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description = "Our address in this tunnel.";
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};
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preSetup = mkOption {
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type = types.str;
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default = "";
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description = "Commands called at the start of the interface setup.";
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};
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postSetup = mkOption {
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type = types.str;
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default = "";
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description = "Commands called at the end of the interface setup.";
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};
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postShutdown = mkOption {
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type = types.str;
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default = "";
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description = "Commands called after shutting down the interface.";
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};
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};
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};
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in {
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options = {
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clerie.gre-tunnel = {
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enable = mkEnableOption "Declarative Policy-Routing";
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ipv6 = mkOption {
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type = with types; attrsOf (submodule checkOpts);
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default = {};
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};
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ipv4 = mkOption {
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type = with types; attrsOf (submodule checkOpts);
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default = {};
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};
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};
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};
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config = mkIf cfg.enable {
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systemd.services =
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(mapAttrs' (generateInterfaceUnit false) cfg.ipv4)
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// (mapAttrs' (generateInterfaceUnit true) cfg.ipv6);
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};
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}
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