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From 34e26e14c5e0fb2d5f05f67858319c9db2058333 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Thu, 10 May 2018 20:54:57 +0100
Subject: [PATCH 05/10] Retry query to other servers on receipt of SERVFAIL
rcode.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/forward.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/src/forward.c
+++ b/src/forward.c
@@ -817,7 +817,7 @@ void reply_query(int fd, int family, tim
/* Note: if we send extra options in the EDNS0 header, we can't recreate
the query from the reply. */
- if (RCODE(header) == REFUSED &&
+ if ((RCODE(header) == REFUSED || RCODE(header) == SERVFAIL) &&
forward->forwardall == 0 &&
!(forward->flags & FREC_HAS_EXTRADATA))
/* for broken servers, attempt to send to another one. */
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