From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Mon, 10 Jul 2023 02:54:33 +0000 (+0900)
Subject: network/neighbor: drop IPv6 settings when the kernel does not support IPv6
X-Git-Tag: v255-rc1~891
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4d4d7910d935fb7db0ea2ce8cf3ad662fedb1bca;p=thirdparty%2Fsystemd.git

network/neighbor: drop IPv6 settings when the kernel does not support IPv6
---

diff --git a/src/network/networkd-neighbor.c b/src/network/networkd-neighbor.c
index 01d17dd3af7..d7d53de3768 100644
--- a/src/network/networkd-neighbor.c
+++ b/src/network/networkd-neighbor.c
@@ -560,6 +560,13 @@ static int neighbor_section_verify(Neighbor *neighbor) {
                                          "Ignoring [Neighbor] section from line %u.",
                                          neighbor->section->filename, neighbor->section->line);
 
+        if (neighbor->family == AF_INET6 && !socket_ipv6_is_supported())
+                return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
+                                         "%s: Neighbor section with an IPv6 destination address configured, "
+                                         "but the kernel does not support IPv6. "
+                                         "Ignoring [Neighbor] section from line %u.",
+                                         neighbor->section->filename, neighbor->section->line);
+
         if (neighbor->ll_addr.length == 0)
                 return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
                                          "%s: Neighbor section without LinkLayerAddress= configured. "