From: Florian Weimer <fweimer@redhat.com>
To: libc-stable@sourceware.org
Subject: [2.32 COMMITTED] support: Provide a way to clear the RA bit in DNS server responses
Date: Tue, 10 Nov 2020 17:02:20 +0100 [thread overview]
Message-ID: <875z6db3oz.fsf@oldenburg2.str.redhat.com> (raw)
(cherry picked from commit 08443b19965f48862b02c2fd7b33a39d66daf2ff)
---
support/resolv_test.c | 4 +++-
support/resolv_test.h | 4 ++++
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/support/resolv_test.c b/support/resolv_test.c
index e343c4b516..9878a040a3 100644
--- a/support/resolv_test.c
+++ b/support/resolv_test.c
@@ -181,7 +181,9 @@ resolv_response_init (struct resolv_response_builder *b,
b->buffer[2] |= b->query_buffer[2] & 0x01; /* Copy the RD bit. */
if (flags.tc)
b->buffer[2] |= 0x02;
- b->buffer[3] = 0x80 | flags.rcode; /* Always set RA. */
+ b->buffer[3] = flags.rcode;
+ if (!flags.clear_ra)
+ b->buffer[3] |= 0x80;
if (flags.ad)
b->buffer[3] |= 0x20;
diff --git a/support/resolv_test.h b/support/resolv_test.h
index c46de32ff4..31a5c1c3e7 100644
--- a/support/resolv_test.h
+++ b/support/resolv_test.h
@@ -148,6 +148,10 @@ struct resolv_response_flags
/* If true, the AD (authenticated data) flag will be set. */
bool ad;
+ /* If true, do not set the RA (recursion available) flag in the
+ response. */
+ bool clear_ra;
+
/* Initial section count values. Can be used to artificially
increase the counts, for malformed packet testing.*/
unsigned short qdcount;
--
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reply other threads:[~2020-11-10 16:02 UTC|newest]
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