From 2c08e3423ab4752fd891057a0100fd451725dc45 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Karel=20Ko=C4=8D=C3=AD?= <cynerd@email.cz>
Date: Fri, 10 Mar 2023 09:50:16 +0100
Subject: nixos/router: try to add IPv6 support

---
 nixos/routers/router.nix | 35 +++++++++++++++++++++++++++++++++--
 1 file changed, 33 insertions(+), 2 deletions(-)

diff --git a/nixos/routers/router.nix b/nixos/routers/router.nix
index 561f9de..25d12da 100644
--- a/nixos/routers/router.nix
+++ b/nixos/routers/router.nix
@@ -71,7 +71,21 @@ in {
         externalInterface = cnf.wan;
         internalInterfaces = ["brlan" "brguest"];
       };
-      dhcpcd.allowInterfaces = [cnf.wan];
+      dhcpcd = {
+        allowInterfaces = [cnf.wan];
+        extraConfig = ''
+          duid
+          noipv6rs
+          waitip 6
+
+          interface ${cnf.wan}
+          ipv6rs
+          iaid 1
+
+          ia_pd 1 brlan
+          #ia_pd 1/::/64 LAN/0/64
+        '';
+      };
       nameservers = ["1.1.1.1" "8.8.8.8"];
     };
 
@@ -132,13 +146,30 @@ in {
           ];
         };
       };
-      # TODO dhcp6
     };
     systemd.services.kea-dhcp4-server.after = [
       "sys-subsystem-net-devices-brlan.device"
       "sys-subsystem-net-devices-brguest.device"
     ];
 
+    services.radvd = {
+      enable = true;
+      config = ''
+        interface ${cnf.wan} {
+          AdvSendAdvert on;
+          MinRtrAdvInterval 3;
+          MaxRtrAdvInterval 10;
+          prefix ::/64 {
+            AdvOnLink on;
+            AdvAutonomous on;
+            AdvRouterAddr on;
+          };
+          RDNSS 2001:4860:4860::8888 2001:4860:4860::8844 {
+          };
+        };
+      '';
+    };
+
     services.kresd = {enable = false;};
 
     networking.nftables.enable = true;
-- 
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