From: Ondřej Surý <ondrej@isc.org>
Date: Thu, 1 Dec 2022 17:31:05 +0000 (+0100)
Subject: Honour single read per client isc_nm_read() call in the TLSDNS
X-Git-Tag: v9.19.8~25^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e3c628d56228aca637dda77c1e568153d8995afc;p=thirdparty%2Fbind9.git

Honour single read per client isc_nm_read() call in the TLSDNS

The TLSDNS transport was not honouring the single read callback for
TLSDNS client.  It would call the read callbacks repeatedly in case the
single TLS read would result in multiple DNS messages in the decoded
buffer.
---

diff --git a/lib/isc/netmgr/tlsdns.c b/lib/isc/netmgr/tlsdns.c
index db8d7095801..0da0dfe7f1a 100644
--- a/lib/isc/netmgr/tlsdns.c
+++ b/lib/isc/netmgr/tlsdns.c
@@ -1127,6 +1127,10 @@ tls_cycle_input(isc_nmsocket_t *sock) {
 				goto failure;
 			}
 
+			if (atomic_load(&sock->client)) {
+				break;
+			}
+
 			if (pending == 0) {
 				break;
 			}