From f746f5a80212f7f8e4f48ec00a9bfbb2c8045c40 Mon Sep 17 00:00:00 2001
From: phonedph1 <20867105+phonedph1@users.noreply.github.com>
Date: Thu, 4 Nov 2021 11:13:39 -0600
Subject: [PATCH] Update dnsdist.cc

---
 pdns/dnsdist.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pdns/dnsdist.cc b/pdns/dnsdist.cc
index 79aaebaf8b..186bd58be5 100644
--- a/pdns/dnsdist.cc
+++ b/pdns/dnsdist.cc
@@ -2044,7 +2044,7 @@ static void setUpLocalBind(std::unique_ptr<ClientState>& cs)
     int one=1;
     (void)setsockopt(fd, IPPROTO_IP, GEN_IP_PKTINFO, &one, sizeof(one)); // linux supports this, so why not - might fail on other systems
 #ifdef IPV6_RECVPKTINFO
-    if (setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one)) < 0 &&
+    if (cs->local.sin4.sin_family == AF_INET6 && setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one)) < 0 &&
         !g_warned_ipv6_recvpktinfo) {
         warnlog("Warning: IPV6_RECVPKTINFO setsockopt failed: %s", stringerror());
         g_warned_ipv6_recvpktinfo = true;
-- 
2.47.2