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Check dns64 + server-stale short timeout

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Check that named correctly returns a synthesized DNS64 answer when the
server stale timer triggers for the A lookup.  Use a small value for
stale-answer-client-timeout (2ms) and delay the A response by 1 second.
This commit is contained in:
Mark Andrews 2023-10-12 15:25:57 +11:00 committed by Michał Kępień
parent fccc618514
commit 2eee1e1761
3 changed files with 73 additions and 0 deletions
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10
bin/tests/system/serve-stale/ans2/ans.pl
View file

@ -162,6 +162,16 @@ sub reply_handler {
push @auth, $rr;
}
$rcode = "NOERROR";
} elsif ($qname eq "a-only-slow.example") {
if ($qtype eq "A") {
sleep(1);
my $rr = new Net::DNS::RR("a-only-slow.example 2 IN A $localaddr");
push @ans, $rr;
} else {
my $rr = new Net::DNS::RR($negSOA);
push @auth, $rr;
}
$rcode = "NOERROR";
} elsif ($qname eq "cname.example") {
if ($qtype eq "A") {
my $rr = new Net::DNS::RR($CNAME);

46
bin/tests/system/serve-stale/ns3/named9.conf.in Normal file
View file

@ -0,0 +1,46 @@
/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
key rndc_key {
secret "1234abcd8765";
algorithm @DEFAULT_HMAC@;
};
controls {
inet 10.53.0.3 port @CONTROLPORT@ allow { any; } keys { rndc_key; };
};
options {
query-source address 10.53.0.3;
notify-source 10.53.0.3;
transfer-source 10.53.0.3;
port @PORT@;
pid-file "named.pid";
listen-on { 10.53.0.3; };
listen-on-v6 { none; };
recursion yes;
dnssec-validation no;
stale-answer-enable yes;
stale-cache-enable yes;
stale-answer-client-timeout 2;
dns64 2001:aaaa::/96 {
clients { any; };
mapped { any; };
};
};
zone "." {
type secondary;
primaries { 10.53.0.1; };
file "root.bk";
};

17
bin/tests/system/serve-stale/tests.sh
View file

@ -2666,6 +2666,23 @@ grep "2001:aaaa" dig.out.2.test$n >/dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
n=$((n + 1))
echo_i "check DNS64 processing of a stale negative answer (short serve-stale-client-timeout) ($n)"
ret=0
# configure ns3 with dns64
copy_setports ns3/named9.conf.in ns3/named.conf
$RNDCCMD 10.53.0.3 reload >rndc.out.test$n.1 2>&1 || ret=1
# flush cache, enable ans2 responses, make sure serve-stale is on
$RNDCCMD 10.53.0.3 flush >rndc.out.test$n.1 2>&1 || ret=1
$DIG -p ${PORT} @10.53.0.2 txt enable >/dev/null
$RNDCCMD 10.53.0.3 serve-stale on >rndc.out.test$n.2 2>&1 || ret=1
#
$DIG -p ${PORT} @10.53.0.3 a-only-slow.example AAAA >dig.out.test$n || ret=1
grep "status: NOERROR" dig.out.test$n >/dev/null || ret=1
grep "2001:aaaa" dig.out.test$n >/dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status + ret))
###########################################################
# Test serve-stale's interaction with prefetch processing #
###########################################################