93 lines
2.4 KiB
Nix
93 lines
2.4 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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birdPrefix = filter (p: p.type == "bird") cfg.exit.prefix;
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staticPrefix = filter (p: p.type == "static") cfg.exit.prefix;
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in
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{
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options.services.enthalpy.exit = {
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enable = mkEnableOption "netns route leaking";
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prefix = mkOption {
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type = types.listOf (
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types.submodule {
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options = {
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type = mkOption {
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type = types.enum [
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"bird"
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"static"
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];
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default = "static";
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};
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destination = mkOption { type = types.str; };
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source = mkOption {
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type = types.str;
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default = "::/0";
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};
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};
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}
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);
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default = [ ];
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description = ''
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Prefixes to be announced from the default netns to the enthalpy network.
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'';
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};
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};
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config = mkIf (cfg.enable && cfg.exit.enable) {
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systemd.network.networks."50-enthalpy" = {
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matchConfig.Name = "enthalpy";
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routes = singleton {
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Destination = cfg.network;
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Gateway = "fe80::ff:fe00:2";
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};
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linkConfig.RequiredForOnline = false;
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};
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services.enthalpy.bird.config = ''
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protocol static {
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ipv6 sadr;
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${concatMapStringsSep "\n" (p: ''
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route ${p.destination} from ${p.source} via fe80::ff:fe00:1 dev "host";
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'') birdPrefix}
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}
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'';
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systemd.services.enthalpy-exit = {
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path = with pkgs; [
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coreutils
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iproute2
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];
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script = ''
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ip link add enthalpy mtu 1400 address 02:00:00:00:00:01 type veth \
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peer host mtu 1400 address 02:00:00:00:00:02 netns enthalpy
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ip link set enthalpy up
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ip -n enthalpy link set host up
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${concatMapStringsSep "\n" (
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p: "ip -n enthalpy -6 route add ${p.destination} from ${p.source} via fe80::ff:fe00:1 dev host"
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) staticPrefix}
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'';
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preStop = ''
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ip link del enthalpy
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'';
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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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after = [ "netns-enthalpy.service" ];
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partOf = [ "netns-enthalpy.service" ];
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wantedBy = [
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"multi-user.target"
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"netns-enthalpy.service"
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];
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};
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};
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}
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