From fa8b33ce5618362c435d6953c1923ef60afa7424 Mon Sep 17 00:00:00 2001
From: Evan Hunt <each@isc.org>
Date: Thu, 5 May 2022 14:52:15 -0700
Subject: [PATCH] Disable EDNS for the fetchlimit test server

The fetchlimit test depends on a resolver continuing to try UDP
and timing out while the client waits for resolution to succeed.
but since commit bb990030 (flag day 2020), a fetch will always
switch to TCP after two timeouts, unless EDNS was disabled for
the query.

This commit adds "edns no;" to server statements in the fetchlimit
resolver, to restore the behavior expected by the test.

(cherry picked from commit 81deb24deb26095cbf3eaec8e7763973ec4177c3)
---
 bin/tests/system/fetchlimit/ns3/named1.conf.in | 4 ++++
 bin/tests/system/fetchlimit/ns3/named2.conf.in | 4 ++++
 bin/tests/system/fetchlimit/ns3/named3.conf.in | 4 ++++
 3 files changed, 12 insertions(+)

diff --git a/bin/tests/system/fetchlimit/ns3/named1.conf.in b/bin/tests/system/fetchlimit/ns3/named1.conf.in
index ab7c25a0af..3adfe473eb 100644
--- a/bin/tests/system/fetchlimit/ns3/named1.conf.in
+++ b/bin/tests/system/fetchlimit/ns3/named1.conf.in
@@ -28,6 +28,10 @@ options {
 	fetches-per-server 400;
 };
 
+server 10.53.0.4 {
+	edns no;
+};
+
 key rndc_key {
 	secret "1234abcd8765";
 	algorithm hmac-sha256;
diff --git a/bin/tests/system/fetchlimit/ns3/named2.conf.in b/bin/tests/system/fetchlimit/ns3/named2.conf.in
index 27c5f33e3b..74374b106f 100644
--- a/bin/tests/system/fetchlimit/ns3/named2.conf.in
+++ b/bin/tests/system/fetchlimit/ns3/named2.conf.in
@@ -26,6 +26,10 @@ options {
 	fetches-per-zone 40;
 };
 
+server 10.53.0.4 {
+	edns no;
+};
+
 key rndc_key {
 	secret "1234abcd8765";
 	algorithm hmac-sha256;
diff --git a/bin/tests/system/fetchlimit/ns3/named3.conf.in b/bin/tests/system/fetchlimit/ns3/named3.conf.in
index a5d1c165fb..3df353b07d 100644
--- a/bin/tests/system/fetchlimit/ns3/named3.conf.in
+++ b/bin/tests/system/fetchlimit/ns3/named3.conf.in
@@ -26,6 +26,10 @@ options {
 	recursive-clients 400;
 };
 
+server 10.53.0.4 {
+	edns no;
+};
+
 key rndc_key {
 	secret "1234abcd8765";
 	algorithm hmac-sha256;