From 70c96f0e02dcfdc559da4bc699c751d9fb1b2dab Mon Sep 17 00:00:00 2001
From: Martin Weinelt <hexa@darmstadt.ccc.de>
Date: Tue, 24 Nov 2020 21:54:33 +0100
Subject: [PATCH] babeld: add patch to skip per interface rp_filter setup

This is in preparation to run babeld as DynamicUser and was submitted
upstream in https://github.com/jech/babeld/pull/68 and will be part of
the 1.10 release.
---
 pkgs/tools/networking/babeld/default.nix | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/pkgs/tools/networking/babeld/default.nix b/pkgs/tools/networking/babeld/default.nix
index a889821c9475..5c7b26ced05d 100644
--- a/pkgs/tools/networking/babeld/default.nix
+++ b/pkgs/tools/networking/babeld/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, nixosTests }:
+{ lib, stdenv, fetchurl, fetchpatch, nixosTests }:
 
 stdenv.mkDerivation rec {
   pname = "babeld";
@@ -9,6 +9,14 @@ stdenv.mkDerivation rec {
     sha256 = "01vzhrspnm4sy9ggaz9n3bfl5hy3qlynr218j3mdcddzm3h00kqm";
   };
 
+  patches = [
+    (fetchpatch {
+      # Skip kernel_setup_interface when `skip-kernel-setup` is enabled.
+      url = "https://github.com/jech/babeld/commit/f9698a5616842467ad08a5f9ed3d6fcfa2dd2898.patch";
+      sha256 = "00kj2jxsfq0pjk5wrkslyvkww57makxlwa4fd82g7g9hrgahpqwr";
+    })
+  ];
+
   preBuild = ''
     makeFlags="PREFIX=$out ETCDIR=$out/etc"
   '';