From e9c4253d4713235be834d205fb8564c1c0418e2b Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Wed, 3 Feb 2021 17:07:24 +0900
Subject: [PATCH] network: allow to configure nexthop with null address

Closes #18446.
---
 src/network/networkd-nexthop.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/network/networkd-nexthop.c b/src/network/networkd-nexthop.c
index a05026db40..fcbb25ba15 100644
--- a/src/network/networkd-nexthop.c
+++ b/src/network/networkd-nexthop.c
@@ -440,8 +440,9 @@ static int nexthop_section_verify(NextHop *nh) {
         if (section_is_invalid(nh->section))
                 return -EINVAL;
 
-        if (in_addr_is_null(nh->family, &nh->gw) < 0)
-                return -EINVAL;
+        if (nh->family == AF_UNSPEC)
+                /* When no Gateway= is specified, assume IPv4. */
+                nh->family = AF_INET;
 
         return 0;
 }
-- 
2.25.1