458 lines
19 KiB
Nix
458 lines
19 KiB
Nix
{ config, lib, utils, pkgs, ... }:
|
||
|
||
with utils;
|
||
with lib;
|
||
|
||
let
|
||
|
||
cfg = config.networking;
|
||
interfaces = attrValues cfg.interfaces;
|
||
|
||
interfaceIps = i:
|
||
i.ipv4.addresses
|
||
++ optionals cfg.enableIPv6 i.ipv6.addresses;
|
||
|
||
interfaceRoutes = i:
|
||
i.ipv4.routes
|
||
++ optionals cfg.enableIPv6 i.ipv6.routes;
|
||
|
||
dhcpStr = useDHCP: if useDHCP == true || useDHCP == null then "yes" else "no";
|
||
|
||
slaves =
|
||
concatLists (map (bond: bond.interfaces) (attrValues cfg.bonds))
|
||
++ concatLists (map (bridge: bridge.interfaces) (attrValues cfg.bridges))
|
||
++ map (sit: sit.dev) (attrValues cfg.sits)
|
||
++ map (gre: gre.dev) (attrValues cfg.greTunnels)
|
||
++ map (vlan: vlan.interface) (attrValues cfg.vlans)
|
||
# add dependency to physical or independently created vswitch member interface
|
||
# TODO: warn the user that any address configured on those interfaces will be useless
|
||
++ concatMap (i: attrNames (filterAttrs (_: config: config.type != "internal") i.interfaces)) (attrValues cfg.vswitches);
|
||
|
||
genericNetwork = override:
|
||
let gateway = optional (cfg.defaultGateway != null && (cfg.defaultGateway.address or "") != "") cfg.defaultGateway.address
|
||
++ optional (cfg.defaultGateway6 != null && (cfg.defaultGateway6.address or "") != "") cfg.defaultGateway6.address;
|
||
makeGateway = gateway: {
|
||
routeConfig = {
|
||
Gateway = gateway;
|
||
GatewayOnLink = false;
|
||
};
|
||
};
|
||
in optionalAttrs (gateway != [ ]) {
|
||
routes = override (map makeGateway gateway);
|
||
};
|
||
|
||
genericDhcpNetworks = initrd: mkIf cfg.useDHCP {
|
||
networks."99-ethernet-default-dhcp" = {
|
||
# We want to match physical ethernet interfaces as commonly
|
||
# found on laptops, desktops and servers, to provide an
|
||
# "out-of-the-box" setup that works for common cases. This
|
||
# heuristic isn't perfect (it could match interfaces with
|
||
# custom names that _happen_ to start with en or eth), but
|
||
# should be good enough to make the common case easy and can
|
||
# be overridden on a case-by-case basis using
|
||
# higher-priority networks or by disabling useDHCP.
|
||
|
||
# Type=ether matches veth interfaces as well, and this is
|
||
# more likely to result in interfaces being configured to
|
||
# use DHCP when they shouldn't.
|
||
|
||
matchConfig.Name = ["en*" "eth*"];
|
||
DHCP = "yes";
|
||
networkConfig.IPv6PrivacyExtensions = "kernel";
|
||
};
|
||
networks."99-wireless-client-dhcp" = {
|
||
# Like above, but this is much more likely to be correct.
|
||
matchConfig.WLANInterfaceType = "station";
|
||
DHCP = "yes";
|
||
networkConfig.IPv6PrivacyExtensions = "kernel";
|
||
# We also set the route metric to one more than the default
|
||
# of 1024, so that Ethernet is preferred if both are
|
||
# available.
|
||
dhcpV4Config.RouteMetric = 1025;
|
||
ipv6AcceptRAConfig.RouteMetric = 1025;
|
||
};
|
||
};
|
||
|
||
|
||
interfaceNetworks = mkMerge (forEach interfaces (i: {
|
||
netdevs = mkIf i.virtual ({
|
||
"40-${i.name}" = {
|
||
netdevConfig = {
|
||
Name = i.name;
|
||
Kind = i.virtualType;
|
||
};
|
||
"${i.virtualType}Config" = optionalAttrs (i.virtualOwner != null) {
|
||
User = i.virtualOwner;
|
||
};
|
||
};
|
||
});
|
||
networks."40-${i.name}" = mkMerge [ (genericNetwork id) {
|
||
name = mkDefault i.name;
|
||
DHCP = mkForce (dhcpStr
|
||
(if i.useDHCP != null then i.useDHCP else false));
|
||
address = forEach (interfaceIps i)
|
||
(ip: "${ip.address}/${toString ip.prefixLength}");
|
||
routes = forEach (interfaceRoutes i)
|
||
(route: {
|
||
# Most of these route options have not been tested.
|
||
# Please fix or report any mistakes you may find.
|
||
routeConfig =
|
||
optionalAttrs (route.address != null && route.prefixLength != null) {
|
||
Destination = "${route.address}/${toString route.prefixLength}";
|
||
} //
|
||
optionalAttrs (route.options ? fastopen_no_cookie) {
|
||
FastOpenNoCookie = route.options.fastopen_no_cookie;
|
||
} //
|
||
optionalAttrs (route.via != null) {
|
||
Gateway = route.via;
|
||
} //
|
||
optionalAttrs (route.type != null) {
|
||
Type = route.type;
|
||
} //
|
||
optionalAttrs (route.options ? onlink) {
|
||
GatewayOnLink = true;
|
||
} //
|
||
optionalAttrs (route.options ? initrwnd) {
|
||
InitialAdvertisedReceiveWindow = route.options.initrwnd;
|
||
} //
|
||
optionalAttrs (route.options ? initcwnd) {
|
||
InitialCongestionWindow = route.options.initcwnd;
|
||
} //
|
||
optionalAttrs (route.options ? pref) {
|
||
IPv6Preference = route.options.pref;
|
||
} //
|
||
optionalAttrs (route.options ? mtu) {
|
||
MTUBytes = route.options.mtu;
|
||
} //
|
||
optionalAttrs (route.options ? metric) {
|
||
Metric = route.options.metric;
|
||
} //
|
||
optionalAttrs (route.options ? src) {
|
||
PreferredSource = route.options.src;
|
||
} //
|
||
optionalAttrs (route.options ? protocol) {
|
||
Protocol = route.options.protocol;
|
||
} //
|
||
optionalAttrs (route.options ? quickack) {
|
||
QuickAck = route.options.quickack;
|
||
} //
|
||
optionalAttrs (route.options ? scope) {
|
||
Scope = route.options.scope;
|
||
} //
|
||
optionalAttrs (route.options ? from) {
|
||
Source = route.options.from;
|
||
} //
|
||
optionalAttrs (route.options ? table) {
|
||
Table = route.options.table;
|
||
} //
|
||
optionalAttrs (route.options ? advmss) {
|
||
TCPAdvertisedMaximumSegmentSize = route.options.advmss;
|
||
} //
|
||
optionalAttrs (route.options ? ttl-propagate) {
|
||
TTLPropagate = route.options.ttl-propagate == "enabled";
|
||
};
|
||
});
|
||
networkConfig.IPv6PrivacyExtensions = "kernel";
|
||
linkConfig = optionalAttrs (i.macAddress != null) {
|
||
MACAddress = i.macAddress;
|
||
} // optionalAttrs (i.mtu != null) {
|
||
MTUBytes = toString i.mtu;
|
||
};
|
||
}];
|
||
}));
|
||
|
||
bridgeNetworks = mkMerge (flip mapAttrsToList cfg.bridges (name: bridge: {
|
||
netdevs."40-${name}" = {
|
||
netdevConfig = {
|
||
Name = name;
|
||
Kind = "bridge";
|
||
};
|
||
};
|
||
networks = listToAttrs (forEach bridge.interfaces (bi:
|
||
nameValuePair "40-${bi}" (mkMerge [ (genericNetwork (mkOverride 999)) {
|
||
DHCP = mkOverride 0 (dhcpStr false);
|
||
networkConfig.Bridge = name;
|
||
} ])));
|
||
}));
|
||
|
||
vlanNetworks = mkMerge (flip mapAttrsToList cfg.vlans (name: vlan: {
|
||
netdevs."40-${name}" = {
|
||
netdevConfig = {
|
||
Name = name;
|
||
Kind = "vlan";
|
||
};
|
||
vlanConfig.Id = vlan.id;
|
||
};
|
||
networks."40-${vlan.interface}" = (mkMerge [ (genericNetwork (mkOverride 999)) {
|
||
vlan = [ name ];
|
||
} ]);
|
||
}));
|
||
|
||
in
|
||
|
||
{
|
||
config = mkMerge [
|
||
|
||
(mkIf config.boot.initrd.network.enable {
|
||
# Note this is if initrd.network.enable, not if
|
||
# initrd.systemd.network.enable. By setting the latter and not the
|
||
# former, the user retains full control over the configuration.
|
||
boot.initrd.systemd.network = mkMerge [
|
||
(genericDhcpNetworks true)
|
||
interfaceNetworks
|
||
bridgeNetworks
|
||
vlanNetworks
|
||
];
|
||
boot.initrd.availableKernelModules =
|
||
optional (cfg.bridges != {}) "bridge" ++
|
||
optional (cfg.vlans != {}) "8021q";
|
||
})
|
||
|
||
(mkIf cfg.useNetworkd {
|
||
|
||
assertions = [ {
|
||
assertion = cfg.defaultGatewayWindowSize == null;
|
||
message = "networking.defaultGatewayWindowSize is not supported by networkd.";
|
||
} {
|
||
assertion = cfg.defaultGateway == null || cfg.defaultGateway.interface == null;
|
||
message = "networking.defaultGateway.interface is not supported by networkd.";
|
||
} {
|
||
assertion = cfg.defaultGateway6 == null || cfg.defaultGateway6.interface == null;
|
||
message = "networking.defaultGateway6.interface is not supported by networkd.";
|
||
} ] ++ flip mapAttrsToList cfg.bridges (n: { rstp, ... }: {
|
||
assertion = !rstp;
|
||
message = "networking.bridges.${n}.rstp is not supported by networkd.";
|
||
}) ++ flip mapAttrsToList cfg.fooOverUDP (n: { local, ... }: {
|
||
assertion = local == null;
|
||
message = "networking.fooOverUDP.${n}.local is not supported by networkd.";
|
||
});
|
||
|
||
networking.dhcpcd.enable = mkDefault false;
|
||
|
||
systemd.network =
|
||
mkMerge [ {
|
||
enable = true;
|
||
}
|
||
(genericDhcpNetworks false)
|
||
interfaceNetworks
|
||
bridgeNetworks
|
||
(mkMerge (flip mapAttrsToList cfg.bonds (name: bond: {
|
||
netdevs."40-${name}" = {
|
||
netdevConfig = {
|
||
Name = name;
|
||
Kind = "bond";
|
||
};
|
||
bondConfig = let
|
||
# manual mapping as of 2017-02-03
|
||
# man 5 systemd.netdev [BOND]
|
||
# to https://www.kernel.org/doc/Documentation/networking/bonding.txt
|
||
# driver options.
|
||
driverOptionMapping = let
|
||
trans = f: optName: { valTransform = f; optNames = [optName]; };
|
||
simp = trans id;
|
||
ms = trans (v: v + "ms");
|
||
in {
|
||
Mode = simp "mode";
|
||
TransmitHashPolicy = simp "xmit_hash_policy";
|
||
LACPTransmitRate = simp "lacp_rate";
|
||
MIIMonitorSec = ms "miimon";
|
||
UpDelaySec = ms "updelay";
|
||
DownDelaySec = ms "downdelay";
|
||
LearnPacketIntervalSec = simp "lp_interval";
|
||
AdSelect = simp "ad_select";
|
||
FailOverMACPolicy = simp "fail_over_mac";
|
||
ARPValidate = simp "arp_validate";
|
||
# apparently in ms for this value?! Upstream bug?
|
||
ARPIntervalSec = simp "arp_interval";
|
||
ARPIPTargets = simp "arp_ip_target";
|
||
ARPAllTargets = simp "arp_all_targets";
|
||
PrimaryReselectPolicy = simp "primary_reselect";
|
||
ResendIGMP = simp "resend_igmp";
|
||
PacketsPerSlave = simp "packets_per_slave";
|
||
GratuitousARP = { valTransform = id;
|
||
optNames = [ "num_grat_arp" "num_unsol_na" ]; };
|
||
AllSlavesActive = simp "all_slaves_active";
|
||
MinLinks = simp "min_links";
|
||
};
|
||
|
||
do = bond.driverOptions;
|
||
assertNoUnknownOption = let
|
||
knownOptions = flatten (mapAttrsToList (_: kOpts: kOpts.optNames)
|
||
driverOptionMapping);
|
||
# options that apparently don’t exist in the networkd config
|
||
unknownOptions = [ "primary" ];
|
||
assertTrace = bool: msg: if bool then true else builtins.trace msg false;
|
||
in assert all (driverOpt: assertTrace
|
||
(elem driverOpt (knownOptions ++ unknownOptions))
|
||
"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.")
|
||
(mapAttrsToList (k: _: k) do); "";
|
||
# get those driverOptions that have been set
|
||
filterSystemdOptions = filterAttrs (sysDOpt: kOpts:
|
||
any (kOpt: do ? ${kOpt}) kOpts.optNames);
|
||
# build final set of systemd options to bond values
|
||
buildOptionSet = mapAttrs (_: kOpts: with kOpts;
|
||
# we simply take the first set kernel bond option
|
||
# (one option has multiple names, which is silly)
|
||
head (map (optN: valTransform (do.${optN}))
|
||
# only map those that exist
|
||
(filter (o: do ? ${o}) optNames)));
|
||
in seq assertNoUnknownOption
|
||
(buildOptionSet (filterSystemdOptions driverOptionMapping));
|
||
|
||
};
|
||
|
||
networks = listToAttrs (forEach bond.interfaces (bi:
|
||
nameValuePair "40-${bi}" (mkMerge [ (genericNetwork (mkOverride 999)) {
|
||
DHCP = mkOverride 0 (dhcpStr false);
|
||
networkConfig.Bond = name;
|
||
} ])));
|
||
})))
|
||
(mkMerge (flip mapAttrsToList cfg.macvlans (name: macvlan: {
|
||
netdevs."40-${name}" = {
|
||
netdevConfig = {
|
||
Name = name;
|
||
Kind = "macvlan";
|
||
};
|
||
macvlanConfig = optionalAttrs (macvlan.mode != null) { Mode = macvlan.mode; };
|
||
};
|
||
networks."40-${macvlan.interface}" = (mkMerge [ (genericNetwork (mkOverride 999)) {
|
||
macvlan = [ name ];
|
||
} ]);
|
||
})))
|
||
(mkMerge (flip mapAttrsToList cfg.fooOverUDP (name: fou: {
|
||
netdevs."40-${name}" = {
|
||
netdevConfig = {
|
||
Name = name;
|
||
Kind = "fou";
|
||
};
|
||
# unfortunately networkd cannot encode dependencies of netdevs on addresses/routes,
|
||
# so we cannot specify Local=, Peer=, PeerPort=. this looks like a missing feature
|
||
# in networkd.
|
||
fooOverUDPConfig = {
|
||
Port = fou.port;
|
||
Encapsulation = if fou.protocol != null then "FooOverUDP" else "GenericUDPEncapsulation";
|
||
} // (optionalAttrs (fou.protocol != null) {
|
||
Protocol = fou.protocol;
|
||
});
|
||
};
|
||
})))
|
||
(mkMerge (flip mapAttrsToList cfg.sits (name: sit: {
|
||
netdevs."40-${name}" = {
|
||
netdevConfig = {
|
||
Name = name;
|
||
Kind = "sit";
|
||
};
|
||
tunnelConfig =
|
||
(optionalAttrs (sit.remote != null) {
|
||
Remote = sit.remote;
|
||
}) // (optionalAttrs (sit.local != null) {
|
||
Local = sit.local;
|
||
}) // (optionalAttrs (sit.ttl != null) {
|
||
TTL = sit.ttl;
|
||
}) // (optionalAttrs (sit.encapsulation != null) (
|
||
{
|
||
FooOverUDP = true;
|
||
Encapsulation =
|
||
if sit.encapsulation.type == "fou"
|
||
then "FooOverUDP"
|
||
else "GenericUDPEncapsulation";
|
||
FOUDestinationPort = sit.encapsulation.port;
|
||
} // (optionalAttrs (sit.encapsulation.sourcePort != null) {
|
||
FOUSourcePort = sit.encapsulation.sourcePort;
|
||
})));
|
||
};
|
||
networks = mkIf (sit.dev != null) {
|
||
"40-${sit.dev}" = (mkMerge [ (genericNetwork (mkOverride 999)) {
|
||
tunnel = [ name ];
|
||
} ]);
|
||
};
|
||
})))
|
||
(mkMerge (flip mapAttrsToList cfg.greTunnels (name: gre: {
|
||
netdevs."40-${name}" = {
|
||
netdevConfig = {
|
||
Name = name;
|
||
Kind = gre.type;
|
||
};
|
||
tunnelConfig =
|
||
(optionalAttrs (gre.remote != null) {
|
||
Remote = gre.remote;
|
||
}) // (optionalAttrs (gre.local != null) {
|
||
Local = gre.local;
|
||
}) // (optionalAttrs (gre.ttl != null) {
|
||
TTL = gre.ttl;
|
||
});
|
||
};
|
||
networks = mkIf (gre.dev != null) {
|
||
"40-${gre.dev}" = (mkMerge [ (genericNetwork (mkOverride 999)) {
|
||
tunnel = [ name ];
|
||
} ]);
|
||
};
|
||
})))
|
||
vlanNetworks
|
||
];
|
||
|
||
# We need to prefill the slaved devices with networking options
|
||
# This forces the network interface creator to initialize slaves.
|
||
networking.interfaces = listToAttrs (map (i: nameValuePair i { }) slaves);
|
||
|
||
systemd.services = let
|
||
# We must escape interfaces due to the systemd interpretation
|
||
subsystemDevice = interface:
|
||
"sys-subsystem-net-devices-${escapeSystemdPath interface}.device";
|
||
# support for creating openvswitch switches
|
||
createVswitchDevice = n: v: nameValuePair "${n}-netdev"
|
||
(let
|
||
deps = map subsystemDevice (attrNames (filterAttrs (_: config: config.type != "internal") v.interfaces));
|
||
ofRules = pkgs.writeText "vswitch-${n}-openFlowRules" v.openFlowRules;
|
||
in
|
||
{ description = "Open vSwitch Interface ${n}";
|
||
wantedBy = [ "network.target" (subsystemDevice n) ];
|
||
# and create bridge before systemd-networkd starts because it might create internal interfaces
|
||
before = [ "systemd-networkd.service" ];
|
||
# shutdown the bridge when network is shutdown
|
||
partOf = [ "network.target" ];
|
||
# requires ovs-vswitchd to be alive at all times
|
||
bindsTo = [ "ovs-vswitchd.service" ];
|
||
# start switch after physical interfaces and vswitch daemon
|
||
after = [ "network-pre.target" "ovs-vswitchd.service" ] ++ deps;
|
||
wants = deps; # if one or more interface fails, the switch should continue to run
|
||
serviceConfig.Type = "oneshot";
|
||
serviceConfig.RemainAfterExit = true;
|
||
path = [ pkgs.iproute2 config.virtualisation.vswitch.package ];
|
||
preStart = ''
|
||
echo "Resetting Open vSwitch ${n}..."
|
||
ovs-vsctl --if-exists del-br ${n} -- add-br ${n} \
|
||
-- set bridge ${n} protocols=${concatStringsSep "," v.supportedOpenFlowVersions}
|
||
'';
|
||
script = ''
|
||
echo "Configuring Open vSwitch ${n}..."
|
||
ovs-vsctl ${concatStrings (mapAttrsToList (name: config: " -- add-port ${n} ${name}" + optionalString (config.vlan != null) " tag=${toString config.vlan}") v.interfaces)} \
|
||
${concatStrings (mapAttrsToList (name: config: optionalString (config.type != null) " -- set interface ${name} type=${config.type}") v.interfaces)} \
|
||
${concatMapStrings (x: " -- set-controller ${n} " + x) v.controllers} \
|
||
${concatMapStrings (x: " -- " + x) (splitString "\n" v.extraOvsctlCmds)}
|
||
|
||
|
||
echo "Adding OpenFlow rules for Open vSwitch ${n}..."
|
||
ovs-ofctl --protocols=${v.openFlowVersion} add-flows ${n} ${ofRules}
|
||
'';
|
||
postStop = ''
|
||
echo "Cleaning Open vSwitch ${n}"
|
||
echo "Shutting down internal ${n} interface"
|
||
ip link set ${n} down || true
|
||
echo "Deleting flows for ${n}"
|
||
ovs-ofctl --protocols=${v.openFlowVersion} del-flows ${n} || true
|
||
echo "Deleting Open vSwitch ${n}"
|
||
ovs-vsctl --if-exists del-br ${n} || true
|
||
'';
|
||
});
|
||
in mapAttrs' createVswitchDevice cfg.vswitches
|
||
// {
|
||
"network-local-commands" = {
|
||
after = [ "systemd-networkd.service" ];
|
||
bindsTo = [ "systemd-networkd.service" ];
|
||
};
|
||
};
|
||
})
|
||
|
||
];
|
||
}
|