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697b4f04bf
These fix minor bugs and contain smaller improvements. Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
30 lines
1.0 KiB
Diff
30 lines
1.0 KiB
Diff
From 86fa1046920dedc8134136a6244ca96e8a37e9d8 Mon Sep 17 00:00:00 2001
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From: Simon Kelley <simon@thekelleys.org.uk>
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Date: Sun, 10 May 2015 13:50:59 +0100
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Subject: [PATCH 090/113] Tweak EDNS timeout code.
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---
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src/forward.c | 6 ++++--
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1 file changed, 4 insertions(+), 2 deletions(-)
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diff --git a/src/forward.c b/src/forward.c
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index 592243fd4d35..74e5ab66c423 100644
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--- a/src/forward.c
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+++ b/src/forward.c
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@@ -799,8 +799,10 @@ void reply_query(int fd, int family, time_t now)
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}
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/* We tried resending to this server with a smaller maximum size and got an answer.
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- Make that permanent. */
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- if (server && (forward->flags & FREC_TEST_PKTSZ))
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+ Make that permanent. To avoid reduxing the packet size for an single dropped packet,
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+ only do this when we get a truncated answer, or one larger than the safe size. */
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+ if (server && (forward->flags & FREC_TEST_PKTSZ) &&
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+ ((header->hb3 & HB3_TC) || n >= SAFE_PKTSZ))
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server->edns_pktsz = SAFE_PKTSZ;
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/* If the answer is an error, keep the forward record in place in case
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--
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2.1.0
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