237 lines
9.4 KiB
Nix
237 lines
9.4 KiB
Nix
{ config, lib, pkgs, utils, ... }:
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with utils;
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with lib;
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let
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cfg = config.networking;
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interfaces = attrValues cfg.interfaces;
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interfaceIps = i:
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i.ip4 ++ optionals cfg.enableIPv6 i.ip6
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++ optional (i.ipAddress != null) {
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address = i.ipAddress;
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prefixLength = i.prefixLength;
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} ++ optional (cfg.enableIPv6 && i.ipv6Address != null) {
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address = i.ipv6Address;
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prefixLength = i.ipv6PrefixLength;
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};
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dhcpStr = useDHCP: if useDHCP == true || useDHCP == null then "both" else "none";
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slaves =
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concatLists (map (bond: bond.interfaces) (attrValues cfg.bonds))
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++ concatLists (map (bridge: bridge.interfaces) (attrValues cfg.bridges))
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++ map (sit: sit.dev) (attrValues cfg.sits)
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++ map (vlan: vlan.interface) (attrValues cfg.vlans);
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in
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{
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config = mkIf cfg.useNetworkd {
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assertions = [ {
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assertion = cfg.defaultGatewayWindowSize == null;
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message = "networking.defaultGatewayWindowSize is not supported by networkd.";
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} {
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assertion = cfg.vswitches == {};
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message = "networking.vswichtes are not supported by networkd.";
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} {
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assertion = cfg.defaultGateway == null || cfg.defaultGateway.interface == null;
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message = "networking.defaultGateway.interface is not supported by networkd.";
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} {
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assertion = cfg.defaultGateway6 == null || cfg.defaultGateway6.interface == null;
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message = "networking.defaultGateway6.interface is not supported by networkd.";
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} ] ++ flip mapAttrsToList cfg.bridges (n: { rstp, ... }: {
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assertion = !rstp;
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message = "networking.bridges.${n}.rstp is not supported by networkd.";
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});
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networking.dhcpcd.enable = mkDefault false;
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systemd.services.network-local-commands = {
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after = [ "systemd-networkd.service" ];
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bindsTo = [ "systemd-networkd.service" ];
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};
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systemd.network =
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let
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domains = cfg.search ++ (optional (cfg.domain != null) cfg.domain);
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genericNetwork = override:
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let gateway = optional (cfg.defaultGateway != null) cfg.defaultGateway.address
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++ optional (cfg.defaultGateway6 != null) cfg.defaultGateway6.address;
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in {
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DHCP = override (dhcpStr cfg.useDHCP);
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} // optionalAttrs (gateway != [ ]) {
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gateway = override gateway;
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} // optionalAttrs (domains != [ ]) {
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domains = override domains;
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};
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in mkMerge [ {
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enable = true;
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networks."99-main" = genericNetwork mkDefault;
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}
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(mkMerge (flip map interfaces (i: {
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netdevs = mkIf i.virtual (
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let
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devType = if i.virtualType != null then i.virtualType
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else (if hasPrefix "tun" i.name then "tun" else "tap");
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in {
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"40-${i.name}" = {
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netdevConfig = {
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Name = i.name;
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Kind = devType;
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};
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"${devType}Config" = optionalAttrs (i.virtualOwner != null) {
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User = i.virtualOwner;
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};
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};
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});
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networks."40-${i.name}" = mkMerge [ (genericNetwork mkDefault) {
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name = mkDefault i.name;
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DHCP = mkForce (dhcpStr
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(if i.useDHCP != null then i.useDHCP else cfg.useDHCP && interfaceIps i == [ ]));
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address = flip map (interfaceIps i)
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(ip: "${ip.address}/${toString ip.prefixLength}");
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} ];
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})))
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(mkMerge (flip mapAttrsToList cfg.bridges (name: bridge: {
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netdevs."40-${name}" = {
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netdevConfig = {
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Name = name;
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Kind = "bridge";
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};
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};
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networks = listToAttrs (flip map bridge.interfaces (bi:
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nameValuePair "40-${bi}" (mkMerge [ (genericNetwork (mkOverride 999)) {
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DHCP = mkOverride 0 (dhcpStr false);
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networkConfig.Bridge = name;
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} ])));
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})))
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(mkMerge (flip mapAttrsToList cfg.bonds (name: bond: {
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netdevs."40-${name}" = {
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netdevConfig = {
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Name = name;
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Kind = "bond";
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};
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bondConfig = let
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# manual mapping as of 2017-02-03
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# man 5 systemd.netdev [BOND]
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# to https://www.kernel.org/doc/Documentation/networking/bonding.txt
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# driver options.
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driverOptionMapping = let
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trans = f: optName: { valTransform = f; optNames = [optName]; };
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simp = trans id;
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ms = trans (v: v + "ms");
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in {
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Mode = simp "mode";
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TransmitHashPolicy = simp "xmit_hash_policy";
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LACPTransmitRate = simp "lacp_rate";
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MIIMonitorSec = ms "miimon";
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UpDelaySec = ms "updelay";
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DownDelaySec = ms "downdelay";
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LearnPacketIntervalSec = simp "lp_interval";
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AdSelect = simp "ad_select";
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FailOverMACPolicy = simp "fail_over_mac";
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ARPValidate = simp "arp_validate";
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# apparently in ms for this value?! Upstream bug?
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ARPIntervalSec = simp "arp_interval";
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ARPIPTargets = simp "arp_ip_target";
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ARPAllTargets = simp "arp_all_targets";
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PrimaryReselectPolicy = simp "primary_reselect";
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ResendIGMP = simp "resend_igmp";
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PacketsPerSlave = simp "packets_per_slave";
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GratuitousARP = { valTransform = id;
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optNames = [ "num_grat_arp" "num_unsol_na" ]; };
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AllSlavesActive = simp "all_slaves_active";
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MinLinks = simp "min_links";
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};
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do = bond.driverOptions;
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assertNoUnknownOption = let
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knownOptions = flatten (mapAttrsToList (_: kOpts: kOpts.optNames)
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driverOptionMapping);
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# options that apparently don’t exist in the networkd config
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unknownOptions = [ "primary" ];
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assertTrace = bool: msg: if bool then true else builtins.trace msg false;
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in assert all (driverOpt: assertTrace
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(elem driverOpt (knownOptions ++ unknownOptions))
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"The bond.driverOption `${driverOpt}` cannot be mapped to the list of known networkd bond options. Please add it to the mapping above the assert or to `unknownOptions` should it not exist in networkd.")
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(mapAttrsToList (k: _: k) do); "";
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# get those driverOptions that have been set
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filterSystemdOptions = filterAttrs (sysDOpt: kOpts:
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any (kOpt: do ? "${kOpt}") kOpts.optNames);
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# build final set of systemd options to bond values
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buildOptionSet = mapAttrs (_: kOpts: with kOpts;
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# we simply take the first set kernel bond option
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# (one option has multiple names, which is silly)
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head (map (optN: valTransform (do."${optN}"))
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# only map those that exist
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(filter (o: do ? "${o}") optNames)));
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in seq assertNoUnknownOption
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(buildOptionSet (filterSystemdOptions driverOptionMapping));
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};
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networks = listToAttrs (flip map bond.interfaces (bi:
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nameValuePair "40-${bi}" (mkMerge [ (genericNetwork (mkOverride 999)) {
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DHCP = mkOverride 0 (dhcpStr false);
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networkConfig.Bond = name;
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} ])));
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})))
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(mkMerge (flip mapAttrsToList cfg.macvlans (name: macvlan: {
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netdevs."40-${name}" = {
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netdevConfig = {
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Name = name;
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Kind = "macvlan";
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};
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macvlanConfig = optionalAttrs (macvlan.mode != null) { Mode = macvlan.mode; };
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};
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networks."40-${macvlan.interface}" = (mkMerge [ (genericNetwork (mkOverride 999)) {
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macvlan = [ name ];
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} ]);
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})))
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(mkMerge (flip mapAttrsToList cfg.sits (name: sit: {
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netdevs."40-${name}" = {
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netdevConfig = {
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Name = name;
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Kind = "sit";
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};
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tunnelConfig =
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(optionalAttrs (sit.remote != null) {
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Remote = sit.remote;
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}) // (optionalAttrs (sit.local != null) {
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Local = sit.local;
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}) // (optionalAttrs (sit.ttl != null) {
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TTL = sit.ttl;
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});
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};
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networks = mkIf (sit.dev != null) {
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"40-${sit.dev}" = (mkMerge [ (genericNetwork (mkOverride 999)) {
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tunnel = [ name ];
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} ]);
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};
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})))
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(mkMerge (flip mapAttrsToList cfg.vlans (name: vlan: {
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netdevs."40-${name}" = {
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netdevConfig = {
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Name = name;
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Kind = "vlan";
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};
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vlanConfig.Id = vlan.id;
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};
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networks."40-${vlan.interface}" = (mkMerge [ (genericNetwork (mkOverride 999)) {
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vlan = [ name ];
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} ]);
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})))
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];
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# We need to prefill the slaved devices with networking options
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# This forces the network interface creator to initialize slaves.
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networking.interfaces = listToAttrs (map (i: nameValuePair i { }) slaves);
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};
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}
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