108 lines
4.1 KiB
Nix
108 lines
4.1 KiB
Nix
# Network Manager:
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# i manage this myself because the nixos service is not flexible enough.
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# - it unconditionally puts modemmanager onto the system path, preventing me from patching modemmanager's service file (without an overlay).
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#
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# XXX: it's normal to see error messages on an ethernet-only host, even when using nixos' official networkmanager service:
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# - `Couldn't initialize supplicant interface: Failed to D-Bus activate wpa_supplicant service`
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{ config, lib, pkgs, ... }:
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let
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cfg = config.sane.programs.networkmanager;
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in
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{
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sane.programs.networkmanager = {
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suggestedPrograms = [ "wpa_supplicant" ];
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enableFor.system = lib.mkIf (builtins.any (en: en) (builtins.attrValues cfg.enableFor.user)) true;
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};
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# add to systemd.packages so we get the service file it ships, then override what we need to customize (taken from nixpkgs)
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systemd.packages = lib.mkIf cfg.enabled [ cfg.package ];
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systemd.services.NetworkManager = lib.mkIf cfg.enabled {
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wantedBy = [ "network.target" ];
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aliases = [ "dbus-org.freedesktop.NetworkManager.service" ];
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serviceConfig = {
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StateDirectory = "NetworkManager";
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StateDirectoryMode = 755; # not sure if this really needs to be 755
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};
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};
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systemd.services.NetworkManager-wait-online = lib.mkIf cfg.enabled {
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wantedBy = [ "network-online.target" ];
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};
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systemd.services.NetworkManager-dispatcher = lib.mkIf cfg.enabled {
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wantedBy = [ "NetworkManager.service" ];
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# to debug, add NM_DISPATCHER_DEBUG_LOG=1
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serviceConfig.ExecStart = [
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"" # first blank line is to clear the upstream `ExecStart` field.
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"${cfg.package}/libexec/nm-dispatcher --persist" # --persist is needed for it to actually run as a daemon
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];
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serviceConfig.Restart = "always";
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serviceConfig.RestartSec = "1s";
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};
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environment.etc = lib.mkIf cfg.enabled {
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"NetworkManager/system-connections".source = "/var/lib/NetworkManager/system-connections";
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"NetworkManager/NetworkManager.conf".text = ''
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[device]
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# wifi.backend: wpa_supplicant or iwd
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wifi.backend=wpa_supplicant
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wifi.scan-rand-mac-address=true
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[logging]
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audit=false
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# level: TRACE, DEBUG, INFO, WARN, ERR, OFF
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level=INFO
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# domain=...
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[main]
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# dhcp:
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# - `internal` (default)
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# - `dhclient` (requires dhclient to be installed)
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# - `dhcpcd` (requires dhcpcd to be installed)
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dhcp=internal
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# dns:
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# - `default`: update /etc/resolv.conf with nameservers provided by the active connection
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# - `none`: NM won't update /etc/resolv.conf
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# - `systemd-resolved`: push DNS config to systemd-resolved
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# - `dnsmasq`: run a local caching nameserver
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dns=${if config.services.resolved.enable then
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"systemd-resolved"
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else if config.sane.services.trust-dns.enable && config.sane.services.trust-dns.asSystemResolver then
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"none"
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else
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"internal"
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}
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plugins=keyfile
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# rc-manager: how NM should write to /etc/resolv.conf
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# - regardless of this setting, NM will write /var/lib/NetworkManager/resolv.conf
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rc-manager=unmanaged
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# systemd-resolved: send DNS config to systemd-resolved?
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# this setting has no effect if dns="systemd-resolved"; it's supplementary, not absolute.
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systemd-resolved=false
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# debug=... (see also: NM_DEBUG env var)
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'';
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};
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hardware.wirelessRegulatoryDatabase = lib.mkIf cfg.enabled true;
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networking.useDHCP = lib.mkIf cfg.enabled false;
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users.groups = lib.mkIf cfg.enabled {
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networkmanager.gid = config.ids.gids.networkmanager;
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};
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services.udev.packages = lib.mkIf cfg.enabled [ cfg.package ];
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security.polkit.enable = lib.mkIf cfg.enabled true;
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security.polkit.extraConfig = ''
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polkit.addRule(function(action, subject) {
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if (
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subject.isInGroup("networkmanager")
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&& (action.id.indexOf("org.freedesktop.NetworkManager.") == 0
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|| action.id.indexOf("org.freedesktop.ModemManager") == 0
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))
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{ return polkit.Result.YES; }
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});
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'';
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boot.kernelModules = [ "ctr" ]; #< TODO: needed (what even is this)?
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# TODO: polkit?
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# TODO: NetworkManager-ensure-profiles?
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}
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