mirror of
https://github.com/NixOS/nixpkgs.git
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543 lines
24 KiB
Nix
543 lines
24 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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slaves = concatMap (i: i.interfaces) (attrValues cfg.bonds)
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++ concatMap (i: i.interfaces) (attrValues cfg.bridges)
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++ concatMap (i: attrNames (filterAttrs (_: config: config.type != "internal") i.interfaces)) (attrValues cfg.vswitches)
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++ concatMap (i: [i.interface]) (attrValues cfg.macvlans)
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++ concatMap (i: [i.interface]) (attrValues cfg.vlans);
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# We must escape interfaces due to the systemd interpretation
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subsystemDevice = interface:
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"sys-subsystem-net-devices-${escapeSystemdPath interface}.device";
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interfaceIps = i:
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i.ipv4.addresses
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++ optionals cfg.enableIPv6 i.ipv6.addresses;
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destroyBond = i: ''
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while true; do
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UPDATED=1
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SLAVES=$(ip link | grep 'master ${i}' | awk -F: '{print $2}')
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for I in $SLAVES; do
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UPDATED=0
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ip link set "$I" nomaster
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done
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[ "$UPDATED" -eq "1" ] && break
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done
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ip link set "${i}" down 2>/dev/null || true
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ip link del "${i}" 2>/dev/null || true
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'';
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# warn that these attributes are deprecated (2017-2-2)
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# Should be removed in the release after next
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bondDeprecation = rec {
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deprecated = [ "lacp_rate" "miimon" "mode" "xmit_hash_policy" ];
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filterDeprecated = bond: (filterAttrs (attrName: attr:
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elem attrName deprecated && attr != null) bond);
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};
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bondWarnings =
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let oneBondWarnings = bondName: bond:
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mapAttrsToList (bondText bondName) (bondDeprecation.filterDeprecated bond);
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bondText = bondName: optName: _:
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"${bondName}.${optName} is deprecated, use ${bondName}.driverOptions";
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in {
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warnings = flatten (mapAttrsToList oneBondWarnings cfg.bonds);
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};
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normalConfig = {
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systemd.services =
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let
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deviceDependency = dev:
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# Use systemd service if we manage device creation, else
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# trust udev when not in a container
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if (hasAttr dev (filterAttrs (k: v: v.virtual) cfg.interfaces)) ||
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(hasAttr dev cfg.bridges) ||
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(hasAttr dev cfg.bonds) ||
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(hasAttr dev cfg.macvlans) ||
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(hasAttr dev cfg.sits) ||
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(hasAttr dev cfg.vlans) ||
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(hasAttr dev cfg.vswitches)
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then [ "${dev}-netdev.service" ]
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else optional (dev != null && dev != "lo" && !config.boot.isContainer) (subsystemDevice dev);
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hasDefaultGatewaySet = (cfg.defaultGateway != null && cfg.defaultGateway.address != "")
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|| (cfg.enableIPv6 && cfg.defaultGateway6 != null && cfg.defaultGateway6.address != "");
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networkLocalCommands = {
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after = [ "network-setup.service" ];
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bindsTo = [ "network-setup.service" ];
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};
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networkSetup =
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{ description = "Networking Setup";
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after = [ "network-pre.target" "systemd-udevd.service" "systemd-sysctl.service" ];
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before = [ "network.target" "shutdown.target" ];
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wants = [ "network.target" ];
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# exclude bridges from the partOf relationship to fix container networking bug #47210
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partOf = map (i: "network-addresses-${i.name}.service") (filter (i: !(hasAttr i.name cfg.bridges)) interfaces);
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conflicts = [ "shutdown.target" ];
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wantedBy = [ "multi-user.target" ] ++ optional hasDefaultGatewaySet "network-online.target";
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unitConfig.ConditionCapability = "CAP_NET_ADMIN";
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path = [ pkgs.iproute ];
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serviceConfig = {
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Type = "oneshot";
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RemainAfterExit = true;
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};
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unitConfig.DefaultDependencies = false;
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script =
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''
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${optionalString config.networking.resolvconf.enable ''
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# Set the static DNS configuration, if given.
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${pkgs.openresolv}/sbin/resolvconf -m 1 -a static <<EOF
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${optionalString (cfg.nameservers != [] && cfg.domain != null) ''
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domain ${cfg.domain}
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''}
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${optionalString (cfg.search != []) ("search " + concatStringsSep " " cfg.search)}
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${flip concatMapStrings cfg.nameservers (ns: ''
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nameserver ${ns}
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'')}
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EOF
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''}
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# Set the default gateway.
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${optionalString (cfg.defaultGateway != null && cfg.defaultGateway.address != "") ''
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${optionalString (cfg.defaultGateway.interface != null) ''
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ip route replace ${cfg.defaultGateway.address} dev ${cfg.defaultGateway.interface} ${optionalString (cfg.defaultGateway.metric != null)
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"metric ${toString cfg.defaultGateway.metric}"
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} proto static
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''}
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ip route replace default ${optionalString (cfg.defaultGateway.metric != null)
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"metric ${toString cfg.defaultGateway.metric}"
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} via "${cfg.defaultGateway.address}" ${
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optionalString (cfg.defaultGatewayWindowSize != null)
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"window ${toString cfg.defaultGatewayWindowSize}"} ${
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optionalString (cfg.defaultGateway.interface != null)
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"dev ${cfg.defaultGateway.interface}"} proto static
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''}
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${optionalString (cfg.defaultGateway6 != null && cfg.defaultGateway6.address != "") ''
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${optionalString (cfg.defaultGateway6.interface != null) ''
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ip -6 route replace ${cfg.defaultGateway6.address} dev ${cfg.defaultGateway6.interface} ${optionalString (cfg.defaultGateway6.metric != null)
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"metric ${toString cfg.defaultGateway6.metric}"
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} proto static
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''}
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ip -6 route replace default ${optionalString (cfg.defaultGateway6.metric != null)
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"metric ${toString cfg.defaultGateway6.metric}"
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} via "${cfg.defaultGateway6.address}" ${
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optionalString (cfg.defaultGatewayWindowSize != null)
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"window ${toString cfg.defaultGatewayWindowSize}"} ${
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optionalString (cfg.defaultGateway6.interface != null)
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"dev ${cfg.defaultGateway6.interface}"} proto static
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''}
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'';
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};
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# For each interface <foo>, create a job ‘network-addresses-<foo>.service"
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# that performs static address configuration. It has a "wants"
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# dependency on ‘<foo>.service’, which is supposed to create
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# the interface and need not exist (i.e. for hardware
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# interfaces). It has a binds-to dependency on the actual
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# network device, so it only gets started after the interface
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# has appeared, and it's stopped when the interface
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# disappears.
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configureAddrs = i:
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let
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ips = interfaceIps i;
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in
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nameValuePair "network-addresses-${i.name}"
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{ description = "Address configuration of ${i.name}";
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wantedBy = [
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"network-setup.service"
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"network-link-${i.name}.service"
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"network.target"
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];
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# order before network-setup because the routes that are configured
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# there may need ip addresses configured
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before = [ "network-setup.service" ];
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bindsTo = deviceDependency i.name;
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after = [ "network-pre.target" ] ++ (deviceDependency i.name);
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serviceConfig.Type = "oneshot";
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serviceConfig.RemainAfterExit = true;
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# Restart rather than stop+start this unit to prevent the
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# network from dying during switch-to-configuration.
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stopIfChanged = false;
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path = [ pkgs.iproute ];
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script =
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''
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state="/run/nixos/network/addresses/${i.name}"
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mkdir -p $(dirname "$state")
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${flip concatMapStrings ips (ip:
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let
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cidr = "${ip.address}/${toString ip.prefixLength}";
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in
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''
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echo "${cidr}" >> $state
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echo -n "adding address ${cidr}... "
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if out=$(ip addr add "${cidr}" dev "${i.name}" 2>&1); then
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echo "done"
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elif ! echo "$out" | grep "File exists" >/dev/null 2>&1; then
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echo "'ip addr add "${cidr}" dev "${i.name}"' failed: $out"
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exit 1
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fi
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''
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)}
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state="/run/nixos/network/routes/${i.name}"
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mkdir -p $(dirname "$state")
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${flip concatMapStrings (i.ipv4.routes ++ i.ipv6.routes) (route:
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let
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cidr = "${route.address}/${toString route.prefixLength}";
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via = optionalString (route.via != null) ''via "${route.via}"'';
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options = concatStrings (mapAttrsToList (name: val: "${name} ${val} ") route.options);
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in
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''
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echo "${cidr}" >> $state
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echo -n "adding route ${cidr}... "
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if out=$(ip route add "${cidr}" ${options} ${via} dev "${i.name}" proto static 2>&1); then
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echo "done"
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elif ! echo "$out" | grep "File exists" >/dev/null 2>&1; then
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echo "'ip route add "${cidr}" ${options} ${via} dev "${i.name}"' failed: $out"
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exit 1
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fi
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''
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)}
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'';
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preStop = ''
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state="/run/nixos/network/routes/${i.name}"
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while read cidr; do
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echo -n "deleting route $cidr... "
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ip route del "$cidr" dev "${i.name}" >/dev/null 2>&1 && echo "done" || echo "failed"
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done < "$state"
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rm -f "$state"
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state="/run/nixos/network/addresses/${i.name}"
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while read cidr; do
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echo -n "deleting address $cidr... "
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ip addr del "$cidr" dev "${i.name}" >/dev/null 2>&1 && echo "done" || echo "failed"
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done < "$state"
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rm -f "$state"
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'';
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};
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createTunDevice = i: nameValuePair "${i.name}-netdev"
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{ description = "Virtual Network Interface ${i.name}";
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bindsTo = [ "dev-net-tun.device" ];
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after = [ "dev-net-tun.device" "network-pre.target" ];
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wantedBy = [ "network-setup.service" (subsystemDevice i.name) ];
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partOf = [ "network-setup.service" ];
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before = [ "network-setup.service" ];
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path = [ pkgs.iproute ];
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serviceConfig = {
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Type = "oneshot";
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RemainAfterExit = true;
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};
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script = ''
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ip tuntap add dev "${i.name}" mode "${i.virtualType}" user "${i.virtualOwner}"
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'';
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postStop = ''
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ip link del ${i.name} || true
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'';
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};
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createBridgeDevice = n: v: nameValuePair "${n}-netdev"
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(let
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deps = concatLists (map deviceDependency v.interfaces);
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in
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{ description = "Bridge Interface ${n}";
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wantedBy = [ "network-setup.service" (subsystemDevice n) ];
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bindsTo = deps ++ optional v.rstp "mstpd.service";
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partOf = [ "network-setup.service" ] ++ optional v.rstp "mstpd.service";
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after = [ "network-pre.target" ] ++ deps ++ optional v.rstp "mstpd.service"
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++ concatMap (i: [ "network-addresses-${i}.service" "network-link-${i}.service" ]) v.interfaces;
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before = [ "network-setup.service" ];
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serviceConfig.Type = "oneshot";
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serviceConfig.RemainAfterExit = true;
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path = [ pkgs.iproute ];
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script = ''
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# Remove Dead Interfaces
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echo "Removing old bridge ${n}..."
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ip link show "${n}" >/dev/null 2>&1 && ip link del "${n}"
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echo "Adding bridge ${n}..."
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ip link add name "${n}" type bridge
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# Enslave child interfaces
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${flip concatMapStrings v.interfaces (i: ''
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ip link set "${i}" master "${n}"
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ip link set "${i}" up
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'')}
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# Save list of enslaved interfaces
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echo "${flip concatMapStrings v.interfaces (i: ''
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${i}
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'')}" > /run/${n}.interfaces
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${optionalString config.virtualisation.libvirtd.enable ''
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# Enslave dynamically added interfaces which may be lost on nixos-rebuild
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#
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# if `libvirtd.service` is not running, do not use `virsh` which would try activate it via 'libvirtd.socket' and thus start it out-of-order.
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# `libvirtd.service` will set up bridge interfaces when it will start normally.
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#
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if ${pkgs.systemd}/bin/systemctl --quiet is-active 'libvirtd.service'; then
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for uri in qemu:///system lxc:///; do
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for dom in $(${pkgs.libvirt}/bin/virsh -c $uri list --name); do
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${pkgs.libvirt}/bin/virsh -c $uri dumpxml "$dom" | \
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${pkgs.xmlstarlet}/bin/xmlstarlet sel -t -m "//domain/devices/interface[@type='bridge'][source/@bridge='${n}'][target/@dev]" -v "concat('ip link set ',target/@dev,' master ',source/@bridge,';')" | \
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${pkgs.bash}/bin/bash
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done
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done
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fi
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''}
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# Enable stp on the interface
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${optionalString v.rstp ''
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echo 2 >/sys/class/net/${n}/bridge/stp_state
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''}
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ip link set "${n}" up
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'';
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postStop = ''
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ip link set "${n}" down || true
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ip link del "${n}" || true
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rm -f /run/${n}.interfaces
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'';
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reload = ''
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# Un-enslave child interfaces (old list of interfaces)
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for interface in `cat /run/${n}.interfaces`; do
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ip link set "$interface" nomaster up
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done
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# Enslave child interfaces (new list of interfaces)
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${flip concatMapStrings v.interfaces (i: ''
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ip link set "${i}" master "${n}"
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ip link set "${i}" up
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'')}
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# Save list of enslaved interfaces
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echo "${flip concatMapStrings v.interfaces (i: ''
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${i}
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'')}" > /run/${n}.interfaces
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# (Un-)set stp on the bridge
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echo ${if v.rstp then "2" else "0"} > /sys/class/net/${n}/bridge/stp_state
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'';
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reloadIfChanged = true;
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});
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createVswitchDevice = n: v: nameValuePair "${n}-netdev"
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(let
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deps = concatLists (map deviceDependency (attrNames (filterAttrs (_: config: config.type != "internal") v.interfaces)));
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internalConfigs = concatMap (i: ["network-link-${i}.service" "network-addresses-${i}.service"]) (attrNames (filterAttrs (_: config: config.type == "internal") v.interfaces));
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ofRules = pkgs.writeText "vswitch-${n}-openFlowRules" v.openFlowRules;
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in
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{ description = "Open vSwitch Interface ${n}";
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wantedBy = [ "network-setup.service" (subsystemDevice n) ] ++ internalConfigs;
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# before = [ "network-setup.service" ];
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# should work without internalConfigs dependencies because address/link configuration depends
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# on the device, which is created by ovs-vswitchd with type=internal, but it does not...
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before = [ "network-setup.service" ] ++ internalConfigs;
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partOf = [ "network-setup.service" ]; # shutdown the bridge when network is shutdown
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bindsTo = [ "ovs-vswitchd.service" ]; # requires ovs-vswitchd to be alive at all times
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after = [ "network-pre.target" "ovs-vswitchd.service" ] ++ deps; # start switch after physical interfaces and vswitch daemon
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wants = deps; # if one or more interface fails, the switch should continue to run
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serviceConfig.Type = "oneshot";
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serviceConfig.RemainAfterExit = true;
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path = [ pkgs.iproute config.virtualisation.vswitch.package ];
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preStart = ''
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echo "Resetting Open vSwitch ${n}..."
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ovs-vsctl --if-exists del-br ${n} -- add-br ${n} \
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-- set bridge ${n} protocols=${concatStringsSep "," v.supportedOpenFlowVersions}
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'';
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script = ''
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echo "Configuring Open vSwitch ${n}..."
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ovs-vsctl ${concatStrings (mapAttrsToList (name: config: " -- add-port ${n} ${name}" + optionalString (config.vlan != null) " tag=${toString config.vlan}") v.interfaces)} \
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${concatStrings (mapAttrsToList (name: config: optionalString (config.type != null) " -- set interface ${name} type=${config.type}") v.interfaces)} \
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${concatMapStrings (x: " -- set-controller ${n} " + x) v.controllers} \
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${concatMapStrings (x: " -- " + x) (splitString "\n" v.extraOvsctlCmds)}
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echo "Adding OpenFlow rules for Open vSwitch ${n}..."
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ovs-ofctl --protocols=${v.openFlowVersion} add-flows ${n} ${ofRules}
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'';
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postStop = ''
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echo "Cleaning Open vSwitch ${n}"
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echo "Shuting down internal ${n} interface"
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ip link set ${n} down || true
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echo "Deleting flows for ${n}"
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ovs-ofctl --protocols=${v.openFlowVersion} del-flows ${n} || true
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echo "Deleting Open vSwitch ${n}"
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ovs-vsctl --if-exists del-br ${n} || true
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'';
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});
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createBondDevice = n: v: nameValuePair "${n}-netdev"
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(let
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deps = concatLists (map deviceDependency v.interfaces);
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in
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{ description = "Bond Interface ${n}";
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wantedBy = [ "network-setup.service" (subsystemDevice n) ];
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bindsTo = deps;
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partOf = [ "network-setup.service" ];
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after = [ "network-pre.target" ] ++ deps
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++ concatMap (i: [ "network-addresses-${i}.service" "network-link-${i}.service" ]) v.interfaces;
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before = [ "network-setup.service" ];
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serviceConfig.Type = "oneshot";
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serviceConfig.RemainAfterExit = true;
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path = [ pkgs.iproute pkgs.gawk ];
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script = ''
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echo "Destroying old bond ${n}..."
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${destroyBond n}
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echo "Creating new bond ${n}..."
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ip link add name "${n}" type bond \
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${let opts = (mapAttrs (const toString)
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(bondDeprecation.filterDeprecated v))
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// v.driverOptions;
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in concatStringsSep "\n"
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(mapAttrsToList (set: val: " ${set} ${val} \\") opts)}
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# !!! There must be a better way to wait for the interface
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while [ ! -d "/sys/class/net/${n}" ]; do sleep 0.1; done;
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# Bring up the bond and enslave the specified interfaces
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ip link set "${n}" up
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${flip concatMapStrings v.interfaces (i: ''
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ip link set "${i}" down
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ip link set "${i}" master "${n}"
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'')}
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'';
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postStop = destroyBond n;
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});
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createMacvlanDevice = n: v: nameValuePair "${n}-netdev"
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(let
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deps = deviceDependency v.interface;
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in
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{ description = "Vlan Interface ${n}";
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wantedBy = [ "network-setup.service" (subsystemDevice n) ];
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bindsTo = deps;
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partOf = [ "network-setup.service" ];
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after = [ "network-pre.target" ] ++ deps;
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before = [ "network-setup.service" ];
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serviceConfig.Type = "oneshot";
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serviceConfig.RemainAfterExit = true;
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path = [ pkgs.iproute ];
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script = ''
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# Remove Dead Interfaces
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ip link show "${n}" >/dev/null 2>&1 && ip link delete "${n}"
|
||
ip link add link "${v.interface}" name "${n}" type macvlan \
|
||
${optionalString (v.mode != null) "mode ${v.mode}"}
|
||
ip link set "${n}" up
|
||
'';
|
||
postStop = ''
|
||
ip link delete "${n}" || true
|
||
'';
|
||
});
|
||
|
||
createSitDevice = n: v: nameValuePair "${n}-netdev"
|
||
(let
|
||
deps = deviceDependency v.dev;
|
||
in
|
||
{ description = "6-to-4 Tunnel Interface ${n}";
|
||
wantedBy = [ "network-setup.service" (subsystemDevice n) ];
|
||
bindsTo = deps;
|
||
partOf = [ "network-setup.service" ];
|
||
after = [ "network-pre.target" ] ++ deps;
|
||
before = [ "network-setup.service" ];
|
||
serviceConfig.Type = "oneshot";
|
||
serviceConfig.RemainAfterExit = true;
|
||
path = [ pkgs.iproute ];
|
||
script = ''
|
||
# Remove Dead Interfaces
|
||
ip link show "${n}" >/dev/null 2>&1 && ip link delete "${n}"
|
||
ip link add name "${n}" type sit \
|
||
${optionalString (v.remote != null) "remote \"${v.remote}\""} \
|
||
${optionalString (v.local != null) "local \"${v.local}\""} \
|
||
${optionalString (v.ttl != null) "ttl ${toString v.ttl}"} \
|
||
${optionalString (v.dev != null) "dev \"${v.dev}\""}
|
||
ip link set "${n}" up
|
||
'';
|
||
postStop = ''
|
||
ip link delete "${n}" || true
|
||
'';
|
||
});
|
||
|
||
createVlanDevice = n: v: nameValuePair "${n}-netdev"
|
||
(let
|
||
deps = deviceDependency v.interface;
|
||
in
|
||
{ description = "Vlan Interface ${n}";
|
||
wantedBy = [ "network-setup.service" (subsystemDevice n) ];
|
||
bindsTo = deps;
|
||
partOf = [ "network-setup.service" ];
|
||
after = [ "network-pre.target" ] ++ deps;
|
||
before = [ "network-setup.service" ];
|
||
serviceConfig.Type = "oneshot";
|
||
serviceConfig.RemainAfterExit = true;
|
||
path = [ pkgs.iproute ];
|
||
script = ''
|
||
# Remove Dead Interfaces
|
||
ip link show "${n}" >/dev/null 2>&1 && ip link delete "${n}"
|
||
ip link add link "${v.interface}" name "${n}" type vlan id "${toString v.id}"
|
||
|
||
# We try to bring up the logical VLAN interface. If the master
|
||
# interface the logical interface is dependent upon is not up yet we will
|
||
# fail to immediately bring up the logical interface. The resulting logical
|
||
# interface will brought up later when the master interface is up.
|
||
ip link set "${n}" up || true
|
||
'';
|
||
postStop = ''
|
||
ip link delete "${n}" || true
|
||
'';
|
||
});
|
||
|
||
in listToAttrs (
|
||
map configureAddrs interfaces ++
|
||
map createTunDevice (filter (i: i.virtual) interfaces))
|
||
// mapAttrs' createBridgeDevice cfg.bridges
|
||
// mapAttrs' createVswitchDevice cfg.vswitches
|
||
// mapAttrs' createBondDevice cfg.bonds
|
||
// mapAttrs' createMacvlanDevice cfg.macvlans
|
||
// mapAttrs' createSitDevice cfg.sits
|
||
// mapAttrs' createVlanDevice cfg.vlans
|
||
// {
|
||
network-setup = networkSetup;
|
||
network-local-commands = networkLocalCommands;
|
||
};
|
||
|
||
services.udev.extraRules =
|
||
''
|
||
KERNEL=="tun", TAG+="systemd"
|
||
'';
|
||
|
||
|
||
};
|
||
|
||
in
|
||
|
||
{
|
||
config = mkMerge [
|
||
bondWarnings
|
||
(mkIf (!cfg.useNetworkd) normalConfig)
|
||
{ # Ensure slave interfaces are brought up
|
||
networking.interfaces = genAttrs slaves (i: {});
|
||
}
|
||
];
|
||
}
|