From a967b6ab05c8a1573123ffec22308010ba2c3432 Mon Sep 17 00:00:00 2001
From: Victor <victor@xirion.net>
Date: Sun, 21 Nov 2021 20:26:08 +0100
Subject: [PATCH] nixos: dns ipv6 support

---
 hosts.nix                         | 3 +++
 nixos/hosts/dns/configuration.nix | 8 ++++++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/hosts.nix b/hosts.nix
index 8b4a3c1..69fe10e 100644
--- a/hosts.nix
+++ b/hosts.nix
@@ -2,6 +2,7 @@
   {
     hostname = "edgerouter";
     ip = "10.42.42.1";
+    ip6 = "2001:41f0:9639:1:b6fb:e4ff:fe53:9c0";
     mac = "B4:FB:E4:53:9C:0A";
     nix = false;
   }
@@ -9,6 +10,7 @@
     hostname = "nuc";
     ip = "10.42.42.42";
     mac = "1C:69:7A:62:30:88";
+    ip6 = "";
     nix = false;
   }
   {
@@ -20,6 +22,7 @@
   {
     hostname = "home-assistant";
     ip = "10.42.42.8";
+    ip6 = "2001:41f0:9639:1:bfe7:3fd9:75de:cbee";
     mac = "74:40:be:48:85:a4";
     nix = false;
   }
diff --git a/nixos/hosts/dns/configuration.nix b/nixos/hosts/dns/configuration.nix
index 565d124..c450dcb 100644
--- a/nixos/hosts/dns/configuration.nix
+++ b/nixos/hosts/dns/configuration.nix
@@ -1,8 +1,12 @@
 { config, pkgs, hosts, ... }:
 let 
   localdomain = "olympus";
+  ipv6Hosts = builtins.filter (builtins.hasAttr ip6) hosts;
+
   localData = { hostname, ip, ... }: ''"${hostname}.${localdomain}. A ${ip}"'';
+  local6Data = { hostname, ip6, ... }: ''"${hostname}.${localdomain}. AAAA ${ip6}"'';
   ptrData = { hostname, ip, ... }: ''"${ip} ${hostname}.${localdomain}"'';
+  ptr6Data = { hostname, ip6, ... }: ''"${ip6} ${hostname}.${localdomain}"'';
 in {
   imports = [ ];
 
@@ -32,8 +36,8 @@ in {
         interface = [ "0.0.0.0" "::0" ];
 
         local-zone = ''"${localdomain}." transparent'';
-        local-data = map localData hosts;
-        local-data-ptr = map ptrData hosts;
+        local-data = (map localData hosts) ++ (map local6Data ipv6Hosts);
+        local-data-ptr = (map ptrData hosts);
 
         access-control = [
           "127.0.0.1/32 allow_snoop"