70 lines
2.8 KiB
Nix
70 lines
2.8 KiB
Nix
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{ lib
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, config
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, pkgs
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, utils
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, ... }:
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let
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cfg = config.router;
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exitHook = pkgs.writeText "dhcpcd.exit-hook" ''
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if [ "$reason" = BOUND -o "$reason" = REBOOT ]; then
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# Restart ntpd. We need to restart it to make sure that it
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# will actually do something: if ntpd cannot resolve the
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# server hostnames in its config file, then it will never do
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# anything ever again ("couldn't resolve ..., giving up on
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# it"), so we silently lose time synchronisation. This also
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# applies to openntpd.
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/run/current-system/systemd/bin/systemctl try-reload-or-restart ntpd.service openntpd.service chronyd.service || true
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fi
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'';
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in {
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config = lib.mkIf (cfg.enable && builtins.any (x: x.dhcpcd.enable) (builtins.attrValues cfg.interfaces)) {
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users.users.dhcpcd = {
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isSystemUser = true;
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group = "dhcpcd";
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};
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users.groups.dhcpcd = {};
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environment.systemPackages = [ pkgs.dhcpcd ];
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environment.etc."dhcpcd.exit-hook".source = exitHook;
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powerManagement.resumeCommands = builtins.concatStringsSep "\n" (lib.mapAttrsToList (interface: icfg: ''
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# Tell dhcpcd to rebind its interfaces if it's running.
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/run/current-system/systemd/bin/systemctl reload "dhcpcd-${utils.escapeSystemdPath interface}.service"
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''));
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systemd.services = lib.mapAttrs' (interface: icfg: let
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escapedInterface = utils.escapeSystemdPath interface;
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dhcpcdConf = pkgs.writeText "dhcpcd.conf" ''
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hostname
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option domain_name_servers, domain_name, domain_search, host_name
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option classless_static_routes, ntp_servers, interface_mtu
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nohook lookup-hostname
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denyinterfaces ve-* vb-* lo peth* vif* tap* tun* virbr* vnet* vboxnet* sit*
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allowinterfaces ${interface}
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waitip
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${icfg.dhcpcd.extraConfig}
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'';
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in {
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name = "dhcpcd-${escapedInterface}";
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value = lib.mkIf icfg.dhcpcd.enable {
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description = "DHCP Client";
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wantedBy = [ "multi-user.target" "network-online.target" ];
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wants = [ "network.target" ];
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before = [ "network-online.target" ];
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after = [ "sys-subsystem-net-devices-${escapedInterface}.device" ];
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bindsTo = [ "sys-subsystem-net-devices-${escapedInterface}.device" ];
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restartTriggers = [ exitHook ];
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stopIfChanged = false;
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path = [ pkgs.dhcpcd pkgs.nettools config.networking.resolvconf.package ];
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unitConfig.ConditionCapability = "CAP_NET_ADMIN";
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serviceConfig = {
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Type = "forking";
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PIDFile = "/run/dhcpcd/${interface}.pid";
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RuntimeDirectory = "dhcpcd";
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ExecStart = "@${pkgs.dhcpcd}/sbin/dhcpcd dhcpcd --quiet --config ${dhcpcdConf} ${lib.escapeShellArg interface}";
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ExecReload = "${pkgs.dhcpcd}/sbin/dhcpcd --rebind";
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Restart = "always";
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};
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};
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}) cfg.interfaces;
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};
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}
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