From 342a47f9bcbdf636158bf7fed22f9d94af1189d9 Mon Sep 17 00:00:00 2001
From: Tom Herbers <mail@tomherbers.de>
Date: Sat, 21 Sep 2024 02:08:33 +0200
Subject: [PATCH] nixos/networkd: add DHCPv4 - IPv6OnlyMode toggle

The option was introduced in systemd version 255.

https://www.freedesktop.org/software/systemd/man/latest/systemd.network.html#IPv6OnlyMode=
---
 nixos/modules/system/boot/networkd.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/nixos/modules/system/boot/networkd.nix b/nixos/modules/system/boot/networkd.nix
index e000d99cfb48..94a5de7e2bd4 100644
--- a/nixos/modules/system/boot/networkd.nix
+++ b/nixos/modules/system/boot/networkd.nix
@@ -855,6 +855,7 @@ let
           "UseGateway"
           "UseRoutes"
           "UseTimezone"
+          "IPv6OnlyMode"
           "ClientIdentifier"
           "VendorClassIdentifier"
           "UserClass"
@@ -888,6 +889,7 @@ let
         (assertValueOneOf "UseGateway" boolValues)
         (assertValueOneOf "UseRoutes" boolValues)
         (assertValueOneOf "UseTimezone" boolValues)
+        (assertValueOneOf "IPv6OnlyMode" boolValues)
         (assertValueOneOf "ClientIdentifier" ["mac" "duid" "duid-only"])
         (assertInt "IAID")
         (assertValueOneOf "RequestBroadcast" boolValues)