31 lines
1.2 KiB
Diff
31 lines
1.2 KiB
Diff
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From 94a8815892f538b334d640012eebcafc2c7fa284 Mon Sep 17 00:00:00 2001
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From: Martin Wetterwald <martin.wetterwald@corp.ovh.com>
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Date: Thu, 27 Oct 2016 12:17:03 +0200
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Subject: [PATCH] Consider SERVFAIL as a non-successful response
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Treat Servfail as a recoverable error instead of a hard error.
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A misconfigured dns forwarder upstream can return a Servfail faster than
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a correctly configured one.
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In the case of a dnssec misbehaving, it will misbehave on all correctly
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configured upstreams. In the case of a normal DNS query, the original
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behavior of dnsmasq here was more robust.
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---
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src/forward.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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--- a/src/forward.c
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+++ b/src/forward.c
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@@ -853,7 +853,8 @@ void reply_query(int fd, int family, tim
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we get a good reply from another server. Kill it when we've
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had replies from all to avoid filling the forwarding table when
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everything is broken */
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- if (forward->forwardall == 0 || --forward->forwardall == 1 || RCODE(header) != REFUSED)
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+ if (forward->forwardall == 0 || --forward->forwardall == 1
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+ || (RCODE(header) != REFUSED && RCODE(header) != SERVFAIL))
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{
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int check_rebind = 0, no_cache_dnssec = 0, cache_secure = 0, bogusanswer = 0;
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