switch to systemd-networkd

1 files changed, 79 insertions, 41 deletions

diff --git a/router.nix b/router.nix
index 88e2ab7..03f41fc 100644
--- a/router.nix
+++ b/router.nix
@@ -1,9 +1,4 @@
 { config, pkgs, ... }:
-let
-  wanInterface = "enp8s0";
-  lanInterface = "enp5s0f0u2";
-  wifiInterface = "wlp9s0";
-in
 {
   boot.kernel.sysctl."net.ipv4.conf.all.forwarding" = true;
 
@@ -19,8 +14,8 @@ in
     };
     nat = {
       enable = true;
-      externalInterface = wanInterface;
-      internalInterfaces = [ "br0" ];
+      externalInterface = "wan";
+      internalInterfaces = [ "lanbr" ];
       forwardPorts = [
         {
           sourcePort = 51801;
@@ -37,46 +32,89 @@ in
         }
       ];
     };
-    bridges.br0.interfaces = [
-      lanInterface
-      wifiInterface
-    ];
-    interfaces.br0.ipv4.addresses = [
-      {
-        address = "10.69.0.1";
-        prefixLength = 16;
-      }
-    ];
-    networkmanager = {
-      enable = true;
-      unmanaged = [
-        "interface-name:${lanInterface}"
-        "interface-name:${wifiInterface}"
-      ];
-      dispatcherScripts = [
-        {
-          type = "basic";
-          source = pkgs.writeScript "dynamic-dns-on-ipv4-change" ''
-            #!/bin/sh
-
-            [ "$1" = "${wanInterface}" ] || exit
-            [ "$2" = dhcp4-change ] || exit
-            ${pkgs.curl}/bin/curl "$(cat "${config.age.secrets."dyndns-url.txt".path}")"
-            date >> /home/mathias/networkmanager-dispatcherScripts-run
-          '';
-        }
-      ];
-    };
     nameservers = [ "127.0.0.1" ];
+
+    useDHCP = false;
+  };
+
+  systemd.network = {
+    enable = true;
+
+    links."10-wan" = {
+      matchConfig.Path = "pci-0000:08:00.0";
+      linkConfig.Name = "wan";
+    };
+    networks."10-wan" = {
+      matchConfig.Name = "wan";
+      networkConfig = {
+        DHCP = "ipv4";
+        IPv6AcceptRA = true; # I don't get ipv6 from telenor but who knows, maybe in the future?
+      };
+      linkConfig.RequiredForOnline = "routable";
+    };
+
+    netdevs."10-lanbr".netdevConfig = {
+      Kind = "bridge";
+      Name = "lanbr";
+    };
+    networks."10-lanbr" = {
+      matchConfig.Name = "lanbr";
+      bridgeConfig = { };
+      networkConfig = {
+        IPMasquerade = "ipv4";
+        Address = "10.69.0.1/16";
+      };
+      linkConfig.RequiredForOnline = "routable";
+    };
+
+    links."10-ethlan" = {
+      matchConfig.Path = "pci-0000:05:00.0-usb-0:2:1.0";
+      linkConfig.Name = "ethlan";
+    };
+    networks."10-ethlan" = {
+      matchConfig.Name = "ethlan";
+      networkConfig.Bridge = "lanbr";
+      linkConfig.RequiredForOnline = "enslaved";
+    };
+
+    links."10-wlan" = {
+      matchConfig.Path = "pci-0000:09:00.0";
+      linkConfig.Name = "wlan";
+    };
+    networks."10-wlan" = {
+      matchConfig.Name = "wlan";
+      networkConfig.Bridge = "lanbr";
+      linkConfig.RequiredForOnline = "enslaved";
+    };
+  };
+  services.resolved.enable = false;
+
+  services.networkd-dispatcher = {
+    enable = true;
+    rules."ddns" = {
+      onState = [ "routable" ];
+      script = ''
+        #!/bin/sh
+
+        if [[ "$IFACE" != "wan" || "$STATE" != "routable" ]]; then
+          exit 0
+        fi
+
+        ${pkgs.curl}/bin/curl "$(cat "${config.age.secrets."dyndns-url.txt".path}")"
+        printf "%s: %s\n" "$(date)" "$ADDR" >> /home/mathias/networkd-dispatcher-run
+
+        exit 0
+      '';
+    };
   };
 
   services.hostapd = {
     enable = true;
-    radios.${wifiInterface} = {
+    radios.wlan = {
       countryCode = "SE";
       band = "2g";
-      channel = 12;
-      networks.${wifiInterface} = {
+      channel = 11;
+      networks.wlan = {
         ssid = "Heidrun";
         authentication = {
           mode = "wpa3-sae";
@@ -103,7 +141,7 @@ in
         "1.0.0.1"
       ];
 
-      interface = "br0";
+      interface = "lanbr";
       dhcp-range = "10.69.0.50,10.69.0.254,255.255.0.0,1h";
       dhcp-option = [
         "option:router,10.69.0.1"