sys/net: enable IPv6 RA on default interface

1 files changed, 15 insertions, 5 deletions

diff --git a/sys/net.nix b/sys/net.nix
index 4075a12..b441350 100644
--- a/sys/net.nix
+++ b/sys/net.nix
@@ -15,18 +15,28 @@ in
   };
 
   config = {
+    environment.systemPackages = [ pkgs.dhcpcd ];
+
     networking = {
       hostName = cfg.hostname;
+
       useDHCP = false;
       useNetworkd = true;
 
-      interfaces = mkIf (cfg.dhcpInterface != null) {
-        "${cfg.dhcpInterface}".useDHCP = true;
-      };
-
       wireguard.enable = true;
     };
 
-    environment.systemPackages = [ pkgs.dhcpcd ];
+    systemd.network.networks."40-${cfg.dhcpInterface}" = mkIf (cfg.dhcpInterface != null) {
+      matchConfig.Name = cfg.dhcpInterface;
+
+      networkConfig = {
+        DHCP = "ipv4";
+        IPv6AcceptRA = true;
+        IPv6PrivacyExtensions = "kernel";
+      };
+
+      # make routing on this interface a dependency for network-online.target
+      linkConfig.RequiredForOnline = "routable";
+    };
   };
 }