From d796f7c18ddab42281210754d1af90a65567193c Mon Sep 17 00:00:00 2001
From: Remi Gacogne <remi.gacogne@powerdns.com>
Date: Mon, 25 Mar 2024 10:14:59 +0100
Subject: [PATCH] dnsdist: also handle EHOSTUNREACH as a case for reconnecting
 the socket

Manual backport of c42df46af74f9af4158eebb51bfba3d1d8fb1a42 to
rel/dnsdist-1.9.x
---
 pdns/dnsdist.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pdns/dnsdist.cc b/pdns/dnsdist.cc
index a08d273138..0c99cf0330 100644
--- a/pdns/dnsdist.cc
+++ b/pdns/dnsdist.cc
@@ -1263,7 +1263,7 @@ ssize_t udpClientSendRequestToBackend(const std::shared_ptr<DownstreamState>& ba
        because it's not using the same socket.
     */
     if (!healthCheck) {
-      if (savederrno == EINVAL || savederrno == ENODEV || savederrno == ENETUNREACH || savederrno == EBADF) {
+      if (savederrno == EINVAL || savederrno == ENODEV || savederrno == ENETUNREACH || savederrno == EHOSTUNREACH || savederrno == EBADF) {
         backend->reconnect();
       }
       backend->reportTimeoutOrError();
-- 
2.47.2