144 lines
4 KiB
Nix
144 lines
4 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.babeld;
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conditionalBoolToString = value: if (isBool value) then (boolToString value) else (toString value);
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paramsString = params:
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concatMapStringsSep " " (name: "${name} ${conditionalBoolToString (getAttr name params)}")
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(attrNames params);
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interfaceConfig = name:
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let
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interface = getAttr name cfg.interfaces;
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in
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"interface ${name} ${paramsString interface}\n";
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configFile = with cfg; pkgs.writeText "babeld.conf" (
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''
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skip-kernel-setup true
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''
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+ (optionalString (cfg.interfaceDefaults != null) ''
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default ${paramsString cfg.interfaceDefaults}
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'')
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+ (concatMapStrings interfaceConfig (attrNames cfg.interfaces))
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+ extraConfig);
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in
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{
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meta.maintainers = with maintainers; [ hexa ];
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###### interface
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options = {
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services.babeld = {
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enable = mkEnableOption "the babeld network routing daemon";
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interfaceDefaults = mkOption {
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default = null;
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description = lib.mdDoc ''
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A set describing default parameters for babeld interfaces.
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See {manpage}`babeld(8)` for options.
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'';
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type = types.nullOr (types.attrsOf types.unspecified);
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example =
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{
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type = "tunnel";
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split-horizon = true;
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};
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};
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interfaces = mkOption {
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default = {};
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description = lib.mdDoc ''
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A set describing babeld interfaces.
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See {manpage}`babeld(8)` for options.
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'';
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type = types.attrsOf (types.attrsOf types.unspecified);
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example =
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{ enp0s2 =
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{ type = "wired";
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hello-interval = 5;
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split-horizon = "auto";
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};
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};
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};
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extraConfig = mkOption {
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default = "";
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type = types.lines;
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description = lib.mdDoc ''
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Options that will be copied to babeld.conf.
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See {manpage}`babeld(8)` for details.
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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 config.services.babeld.enable {
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boot.kernel.sysctl = {
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"net.ipv6.conf.all.forwarding" = 1;
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"net.ipv6.conf.all.accept_redirects" = 0;
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"net.ipv4.conf.all.forwarding" = 1;
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"net.ipv4.conf.all.rp_filter" = 0;
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} // lib.mapAttrs' (ifname: _: lib.nameValuePair "net.ipv4.conf.${ifname}.rp_filter" (lib.mkDefault 0)) config.services.babeld.interfaces;
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systemd.services.babeld = {
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description = "Babel routing daemon";
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after = [ "network.target" ];
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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ExecStart = "${pkgs.babeld}/bin/babeld -c ${configFile} -I /run/babeld/babeld.pid -S /var/lib/babeld/state";
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AmbientCapabilities = [ "CAP_NET_ADMIN" ];
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CapabilityBoundingSet = [ "CAP_NET_ADMIN" ];
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DevicePolicy = "closed";
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DynamicUser = true;
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IPAddressAllow = [ "fe80::/64" "ff00::/8" "::1/128" "127.0.0.0/8" ];
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IPAddressDeny = "any";
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LockPersonality = true;
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NoNewPrivileges = true;
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MemoryDenyWriteExecute = true;
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ProtectSystem = "strict";
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ProtectClock = true;
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ProtectKernelTunables = true;
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ProtectKernelModules = true;
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ProtectKernelLogs = true;
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ProtectControlGroups = true;
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RestrictAddressFamilies = [ "AF_NETLINK" "AF_INET6" "AF_INET" ];
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RestrictNamespaces = true;
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RestrictRealtime = true;
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RestrictSUIDSGID = true;
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RemoveIPC = true;
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ProtectHome = true;
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ProtectHostname = true;
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ProtectProc = "invisible";
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PrivateMounts = true;
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PrivateTmp = true;
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PrivateDevices = true;
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PrivateUsers = false; # kernel_route(ADD): Operation not permitted
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ProcSubset = "pid";
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SystemCallArchitectures = "native";
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SystemCallFilter = [
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"@system-service"
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"~@privileged @resources"
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];
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UMask = "0177";
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RuntimeDirectory = "babeld";
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StateDirectory = "babeld";
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};
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};
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};
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}
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