93 lines
2.3 KiB
Nix
93 lines
2.3 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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...
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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.nat64 = {
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enable = mkEnableOption "NAT64";
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table = mkOption {
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type = types.int;
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default = config.networking.routingTables.nat64;
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readOnly = true;
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description = ''
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Routing table used for NAT64 entries.
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'';
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};
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prefix = mkOption {
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type = types.str;
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default = "64:ff9b::/96";
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description = ''
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IPv6 prefix used for NAT64 translation in the network.
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'';
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};
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dynamicPool = mkOption {
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type = types.str;
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default = "100.127.0.0/16";
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description = ''
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IPv4 address prefix allocated for dynamic IP assignment.
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'';
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};
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};
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config = mkIf (cfg.enable && cfg.nat64.enable) {
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systemd.network.config = {
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networkConfig = {
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IPv6Forwarding = true;
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ManageForeignRoutes = false;
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};
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};
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systemd.network.networks."70-nat64" = {
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matchConfig.Name = "nat64";
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routes = [
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{
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Destination = cfg.nat64.prefix;
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Table = cfg.nat64.table;
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}
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{ Destination = cfg.nat64.dynamicPool; }
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];
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networkConfig.LinkLocalAddressing = false;
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linkConfig.RequiredForOnline = false;
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};
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systemd.services.enthalpy-nat64 = {
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serviceConfig = {
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ExecStart = "${pkgs.tayga}/bin/tayga -d --config ${pkgs.writeText "tayga.conf" ''
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tun-device nat64
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ipv6-addr fc00::
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ipv4-addr 100.127.0.1
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prefix ${cfg.nat64.prefix}
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dynamic-pool ${cfg.nat64.dynamicPool}
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''}";
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};
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partOf = [ "enthalpy.service" ];
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after = [
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"enthalpy.service"
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"network.target"
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];
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requires = [ "enthalpy.service" ];
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requiredBy = [ "enthalpy.service" ];
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wantedBy = [ "multi-user.target" ];
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};
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networking.nftables.enable = true;
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networking.nftables.tables.enthalpy4 = {
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family = "ip";
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content = ''
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chain forward {
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type filter hook forward priority 0;
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tcp flags syn tcp option maxseg size set 1200
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}
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'';
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};
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};
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}
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