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Add system tests for stale-answer-client-timeout

Browse source 
This commit add 4 tests for the new option:
	1. Test default configuration of stale-answer-client-timeout, a
	   value of 1.8 seconds, with stale-refresh-time disabled.

	2. Test disabling of stale-answer-client-timeout.

	3. Test stale-answer-client-timeout with a value of zero, in this
	   case we take advantage of a log entry which shows that a stale
	   answer was promptly used before an attempt to refresh the RRset
	   is made. We also check, by activating a disabled authoritative
	   server, that the RRset was successfully refreshed after that.

	4. Test stale-answer-client-timeout 0 with stale-refresh-time 4, in
	   this test we want to ensure a couple things:

	   - If we have a stale RRSet entry in cache, a request must be
		 promptly answered with this data, while BIND must also attempt
		 to refresh the RRSet in background.

	   - If the attempt to refresh the RRSet times out, the RRSet must
		 have its stale-refresh-time window activated.

	   - If a new request for the same RRSet arrives, it must be
		 promptly answered with stale data due to stale-refresh-time
		 being active for this RRSet, in this case no attempt to refresh
		 the RRSet is made.

	   - Enable authoritative server, ensure that the RRSet was not
		 refreshed, to honor stale-refresh-time.

	   - Wait for stale-refresh-window time pass, send another request
		 for the same RRSet, this time we expect the answer to be the
		 stale entry in cache being hit due to
		 stale-answer-client-timeout 0.

	    - Send another request, this time we expect the answer to be an
		  active RRSet, since it must have been refreshed during the
		  previous request.

(cherry picked from commit 35fd039d03)
This commit is contained in:
Diego Fronza 2020-12-23 10:47:02 -03:00 committed by Matthijs Mekking
parent 8324c3ddfe
commit bea63000db
7 changed files with 667 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
bin/tests/system/serve-stale/clean.sh
View file

@ -15,4 +15,4 @@ rm -f */named.run */named.memstats
rm -f ns*/managed-keys.bind*
rm -f ns*/named_dump*
rm -f ns*/named.stats*
rm -f ns1/named.run.prev
rm -f ns*/named.run.prev

48
bin/tests/system/serve-stale/ns3/named2.conf.in Normal file
View file

@ -0,0 +1,48 @@
/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* 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 http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*
* Test default stale-answer-client-timeout value
*/
key rndc_key {
secret "1234abcd8765";
algorithm hmac-sha256;
};
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; };
dnssec-validation no;
recursion yes;
stale-answer-enable yes;
stale-cache-enable yes;
stale-answer-ttl 3;
stale-refresh-time 0;
max-stale-ttl 3600;
resolver-query-timeout 10;
};
zone "." {
type secondary;
primaries { 10.53.0.1; };
file "root.bk";
};

48
bin/tests/system/serve-stale/ns3/named3.conf.in Normal file
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@ -0,0 +1,48 @@
/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* 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 http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*
* Test disable of stale-answer-client-timeout.
*/
key rndc_key {
secret "1234abcd8765";
algorithm hmac-sha256;
};
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; };
dnssec-validation no;
recursion yes;
stale-answer-enable yes;
stale-cache-enable yes;
stale-answer-ttl 3;
stale-answer-client-timeout off;
stale-refresh-time 0;
max-stale-ttl 3600;
resolver-query-timeout 10;
};
zone "." {
type hint;
file "root.db";
};

48
bin/tests/system/serve-stale/ns3/named4.conf.in Normal file
View file

@ -0,0 +1,48 @@
/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* 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 http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*
* Test stale-answer-client-timeout 0.
*/
key rndc_key {
secret "1234abcd8765";
algorithm hmac-sha256;
};
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; };
dnssec-validation no;
recursion yes;
stale-answer-enable yes;
stale-cache-enable yes;
stale-answer-ttl 3;
stale-answer-client-timeout 0;
stale-refresh-time 0;
resolver-query-timeout 10;
max-stale-ttl 3600;
};
zone "." {
type hint;
file "root.db";
};

48
bin/tests/system/serve-stale/ns3/named5.conf.in Normal file
View file

@ -0,0 +1,48 @@
/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* 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 http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*
* Test stale-answer-client-timeout 0.
*/
key rndc_key {
secret "1234abcd8765";
algorithm hmac-sha256;
};
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; };
dnssec-validation no;
recursion yes;
stale-answer-enable yes;
stale-cache-enable yes;
stale-answer-ttl 3;
stale-answer-client-timeout 0;
stale-refresh-time 4;
resolver-query-timeout 10;
max-stale-ttl 3600;
};
zone "." {
type hint;
file "root.db";
};

11
bin/tests/system/serve-stale/ns3/root.db Normal file
View file

@ -0,0 +1,11 @@
; Copyright (C) Internet Systems Consortium, Inc. ("ISC")
;
; 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 http://mozilla.org/MPL/2.0/.
;
; See the COPYRIGHT file distributed with this work for additional
; information regarding copyright ownership.
. 300 NS ns.nil.
ns.nil. 300 A 10.53.0.1

466
bin/tests/system/serve-stale/tests.sh
View file

@ -20,7 +20,6 @@ stale_answer_ttl=$(sed -ne 's,^[[:space:]]*stale-answer-ttl \([[:digit:]]*\).*,\
status=0
n=0
#
# First test server with serve-stale options set.
#
@ -189,7 +188,7 @@ if [ $ret != 0 ]; then echo_i "failed"; fi
# 2. Disable responses from authoritative server.
# 3. Sleep for TTL duration so rrset TTL expires (2 sec)
# 4. Query data.example
# 5. Check if response come from stale rrset (3 sec TTL)
# 5. Check if response come from stale rrset (4 sec TTL)
# 6. Enable responses from authoritative server.
# 7. Query data.example
# 8. Check if response come from stale rrset, since the query
@ -886,7 +885,7 @@ $DIG -p ${PORT} @10.53.0.1 data.example TXT > dig.out.test$((n+1))
# Step 8.
n=$((n+1))
echo_i "check stale data.example comes from authoritative (stale-refresh-time disabled) ($n)"
echo_i "check data.example comes from authoritative (stale-refresh-time disabled) ($n)"
ret=0
grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
@ -1554,5 +1553,466 @@ grep -F "#NXDOMAIN" ns5/named.stats.$n.cachedb > /dev/null && ret=1
status=$((status+ret))
if [ $ret != 0 ]; then echo_i "failed"; fi
########################################################
# Test for stale-answer-client-timeout (default 1.8s). #
########################################################
echo_i "test stale-answer-client-timeout (default 1.8)"
n=$((n+1))
echo_i "updating ns3/named.conf ($n)"
ret=0
copy_setports ns3/named2.conf.in ns3/named.conf
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
echo_i "restart ns3"
$PERL ../stop.pl --use-rndc --port ${CONTROLPORT} serve-stale ns3
start_server --noclean --restart --port ${PORT} serve-stale ns3
n=$((n+1))
echo_i "check 'rndc serve-stale status' ($n)"
ret=0
$RNDCCMD 10.53.0.3 serve-stale status > rndc.out.test$n 2>&1 || ret=1
grep '_default: on (stale-answer-ttl=3 max-stale-ttl=3600 stale-refresh-time=0)' rndc.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
n=$((n+1))
echo_i "enable responses from authoritative server ($n)"
ret=0
$DIG -p ${PORT} @10.53.0.2 txt enable > dig.out.test$n
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "TXT.\"1\"" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
n=$((n+1))
echo_i "prime cache data.example (stale-answer-client-timeout)"
ret=0
$DIG -p ${PORT} @10.53.0.3 data.example TXT > dig.out.test$n
grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
n=$((n+1))
echo_i "prime cache nodata.example (stale-answer-client-timeout)"
ret=0
$DIG -p ${PORT} @10.53.0.3 nodata.example TXT > dig.out.test$n
grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
n=$((n+1))
echo_i "disable responses from authoritative server ($n)"
ret=0
$DIG -p ${PORT} @10.53.0.2 txt disable > dig.out.test$n
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "TXT.\"0\"" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
# Allow RRset to become stale.
sleep 2
# We configured a long value of 30 seconds for resolver-query-timeout.
# That should give us enough time to receive an stale answer from cache
# after stale-answer-client-timeout timer of 1.8 sec triggers.
n=$((n+1))
echo_i "check stale data.example comes from cache (default stale-answer-client-timeout) ($n)"
nextpart ns3/named.run > /dev/null
t1=`$PERL -e 'print time()'`
$DIG -p ${PORT} +tries=1 +timeout=10 @10.53.0.3 data.example TXT > dig.out.test$n
t2=`$PERL -e 'print time()'`
wait_for_log 5 "data.example client timeout, stale answer used" ns3/named.run || ret=1
ret=0
grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "data\.example\..*3.*IN.*TXT.*A text record with a 2 second ttl" dig.out.test$n > /dev/null || ret=1
# Default stale-answer-client-timeout is 1.8s, we allow some extra time
# just in case other tests are taking too much cpu.
[ $((t2 - t1)) -le 10 ] || { echo_i "query took $((t2 - t1))s to resolve."; ret=1; }
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
echo_i "sending queries for tests $((n+1))-$((n+2))..."
$DIG -p ${PORT} +tries=1 +timeout=3 @10.53.0.3 nodata.example TXT > dig.out.test$((n+1)) &
$DIG -p ${PORT} +tries=1 +timeout=30 @10.53.0.3 nodata.example TXT > dig.out.test$((n+2))
wait
# Since nodata.example is cached as NXRRSET and marked as
# stale at this point, BIND must not return this RRset when
# stale-answer-client-timeout triggers, instead, it must attempt
# to refresh the RRset.
# Since the authoritative server is disabled and we are using
# resolver-query-timeout value of 10 seconds, we expect this
# query with a timeout of 3 seconds to time out.
n=$((n+1))
echo_i "check query for nodata.example times out (default stale-answer-client-timeout) ($n)"
grep "connection timed out" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
# For this query we expect BIND to return stale NXRRSET data
# for nodata.example after resolver-query-timeout expires.
n=$((n+1))
echo_i "check stale nodata.example comes from cache after resolver-query-timeout expires (default stale-answer-client-timeout) ($n)"
grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
grep "example\..*3.*IN.*SOA" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
#############################################
# Test for stale-answer-client-timeout off. #
#############################################
echo_i "test stale-answer-client-timeout (off)"
n=$((n+1))
echo_i "updating ns3/named.conf ($n)"
ret=0
copy_setports ns3/named3.conf.in ns3/named.conf
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
n=$((n+1))
echo_i "running 'rndc reload' ($n)"
ret=0
rndc_reload ns3 10.53.0.3
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
# Send a query, auth server is disabled, we will enable it after
# a while in order to receive an answer before resolver-query-timeout
# expires. Since stale-answer-client-timeout is disabled we must receive
# an answer from authoritative server.
echo_i "sending query for test $((n+2))"
$DIG -p ${PORT} @10.53.0.3 data.example TXT > dig.out.test$((n+2)) &
sleep 3
n=$((n+1))
echo_i "enable responses from authoritative server ($n)"
ret=0
$DIG -p ${PORT} @10.53.0.2 txt enable > dig.out.test$n
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "TXT.\"1\"" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
# Wait until dig is done.
wait
n=$((n+1))
echo_i "check data.example comes from authoritative server (stale-answer-client-timeout off) ($n)"
grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "data\.example\..*[12].*IN.*TXT.*A text record with a 2 second ttl" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
#############################################
# Test for stale-answer-client-timeout 0. #
#############################################
echo_i "test stale-answer-client-timeout (0)"
n=$((n+1))
echo_i "updating ns3/named.conf ($n)"
ret=0
copy_setports ns3/named4.conf.in ns3/named.conf
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
echo_i "restart ns3"
$PERL ../stop.pl --use-rndc --port ${CONTROLPORT} serve-stale ns3
start_server --noclean --restart --port ${PORT} serve-stale ns3
n=$((n+1))
echo_i "prime cache data.example (stale-answer-client-timeout 0)"
ret=0
$DIG -p ${PORT} @10.53.0.3 data.example TXT > dig.out.test$n
grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
n=$((n+1))
echo_i "prime cache nodata.example (stale-answer-client-timeout 0)"
ret=0
$DIG -p ${PORT} @10.53.0.3 nodata.example TXT > dig.out.test$n
grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
n=$((n+1))
echo_i "disable responses from authoritative server ($n)"
ret=0
$DIG -p ${PORT} @10.53.0.2 txt disable > dig.out.test$n
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "TXT.\"0\"" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
# Allow RRset to become stale.
sleep 2
n=$((n+1))
ret=0
echo_i "check stale data.example comes from cache (stale-answer-client-timeout 0) ($n)"
nextpart ns3/named.run > /dev/null
$DIG -p ${PORT} @10.53.0.3 data.example TXT > dig.out.test$n
wait_for_log 5 "data.example stale answer used, an attempt to refresh the RRset" ns3/named.run || ret=1
grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "data\.example\..*3.*IN.*TXT.*A text record with a 2 second ttl" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
n=$((n+1))
echo_i "enable responses from authoritative server ($n)"
ret=0
$DIG -p ${PORT} @10.53.0.2 txt enable > dig.out.test$n
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "TXT.\"1\"" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
wait_for_rrset_refresh() {
nextpart ns3/named.run | grep 'data.example.*2.*TXT.*"A text record with a 2 second ttl"' > /dev/null && return 0
return 1
}
# This test ensures that after we get stale data due to
# stale-answer-client-timeout 0, enabling the authoritative server
# will allow the RRset to be updated.
n=$((n+1))
ret=0
echo_i "check stale data.example was refreshed (stale-answer-client-timeout 0) ($n)"
retry_quiet 10 wait_for_rrset_refresh || ret=1
$DIG -p ${PORT} @10.53.0.3 data.example TXT > dig.out.test$n
grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "data\.example\..*[12].*IN.*TXT.*A text record with a 2 second ttl" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
n=$((n+1))
echo_i "disable responses from authoritative server ($n)"
ret=0
$DIG -p ${PORT} @10.53.0.2 txt disable > dig.out.test$n
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "TXT.\"0\"" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
echo_i "sending queries for tests $((n+1))-$((n+2))..."
$DIG -p ${PORT} +tries=1 +timeout=3 @10.53.0.3 nodata.example TXT > dig.out.test$((n+1)) &
$DIG -p ${PORT} +tries=1 +timeout=30 @10.53.0.3 nodata.example TXT > dig.out.test$((n+2))
wait
# Since nodata.example is cached as NXRRSET and marked as
# stale at this point, BIND must not prompty return this RRset
# due to stale-answer-client-timeout == 0, instead, it must
# attempt to refresh the RRset.
# Since the authoritative server is disabled and we are using
# resolver-query-timeout value of 10 seconds, we expect this
# query with a timeout of 3 seconds to time out.
n=$((n+1))
echo_i "check query for nodata.example times out (stale-answer-client-timeout 0) ($n)"
grep "connection timed out" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
# For this query we expect BIND to return stale NXRRSET data
# for nodata.example after resolver-query-timeout expires.
n=$((n+1))
echo_i "check stale nodata.example comes from cache after resolver-query-timeout expires (stale-answer-client-timeout 0) ($n)"
grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
grep "example\..*3.*IN.*SOA" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
####################################################################
# Test for stale-answer-client-timeout 0 and stale-refresh-time 4. #
####################################################################
echo_i "test stale-answer-client-timeout (0) and stale-refresh-time (4)"
n=$((n+1))
echo_i "updating ns3/named.conf ($n)"
ret=0
copy_setports ns3/named5.conf.in ns3/named.conf
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
n=$((n+1))
echo_i "running 'rndc reload' ($n)"
ret=0
rndc_reload ns3 10.53.0.3
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
n=$((n+1))
echo_i "flush cache, enable responses from authoritative server ($n)"
ret=0
$RNDCCMD 10.53.0.3 flushtree example > rndc.out.test$n.1 2>&1 || ret=1
$DIG -p ${PORT} @10.53.0.2 txt enable > dig.out.test$n
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "TXT.\"1\"" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
n=$((n+1))
echo_i "prime cache data.example (stale-answer-client-timeout 0, stale-refresh-time 4) ($n)"
ret=0
$DIG -p ${PORT} @10.53.0.3 data.example TXT > dig.out.test$n
grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "data\.example\..*2.*IN.*TXT.*A text record with a 2 second ttl" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
# Allow RRset to become stale.
sleep 2
n=$((n+1))
echo_i "disable responses from authoritative server ($n)"
ret=0
$DIG -p ${PORT} @10.53.0.2 txt disable > dig.out.test$n
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "TXT.\"0\"" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
n=$((n+1))
ret=0
echo_i "check stale data.example comes from cache (stale-answer-client-timeout 0 stale-refresh-time 4) ($n)"
nextpart ns3/named.run > /dev/null
$DIG -p ${PORT} @10.53.0.3 data.example TXT > dig.out.test$n
wait_for_log 5 "data.example stale answer used, an attempt to refresh the RRset" ns3/named.run || ret=1
grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "data\.example\..*3.*IN.*TXT.*A text record with a 2 second ttl" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
n=$((n+1))
echo_i "enable responses from authoritative server ($n)"
ret=0
$DIG -p ${PORT} @10.53.0.2 txt enable > dig.out.test$n
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "TXT.\"1\"" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
# This test ensures that after we get stale data due to
# stale-answer-client-timeout 0, enabling the authoritative server
# will allow the RRset to be updated.
n=$((n+1))
ret=0
echo_i "check stale data.example was refreshed (stale-answer-client-timeout 0 stale-refresh-time 4) ($n)"
retry_quiet 10 wait_for_rrset_refresh || ret=1
$DIG -p ${PORT} @10.53.0.3 data.example TXT > dig.out.test$n
grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "data\.example\..*[12].*IN.*TXT.*A text record with a 2 second ttl" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
# Allow RRset to become stale.
sleep 2
n=$((n+1))
echo_i "disable responses from authoritative server ($n)"
ret=0
$DIG -p ${PORT} @10.53.0.2 txt disable > dig.out.test$n
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "TXT.\"0\"" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
n=$((n+1))
ret=0
echo_i "check stale data.example comes from cache (stale-answer-client-timeout 0 stale-refresh-time 4) ($n)"
nextpart ns3/named.run > /dev/null
$DIG -p ${PORT} @10.53.0.3 data.example TXT > dig.out.test$n
wait_for_log 5 "data.example stale answer used, an attempt to refresh the RRset" ns3/named.run || ret=1
grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "data\.example\..*3.*IN.*TXT.*A text record with a 2 second ttl" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
# Allow stale-refresh-time to be activated.
n=$((n+1))
ret=0
echo_i "wait until resolver query times out, activating stale-refresh-time"
wait_for_log 15 "data.example resolver failure, stale answer used" ns3/named.run || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
n=$((n+1))
ret=0
echo_i "check stale data.example comes from cache within stale-refresh-time (stale-answer-client-timeout 0 stale-refresh-time 4) ($n)"
nextpart ns3/named.run > /dev/null
$DIG -p ${PORT} @10.53.0.3 data.example TXT > dig.out.test$n
wait_for_log 5 "data.example query within stale refresh time" ns3/named.run || ret=1
grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "data\.example\..*3.*IN.*TXT.*A text record with a 2 second ttl" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
n=$((n+1))
echo_i "enable responses from authoritative server ($n)"
ret=0
$DIG -p ${PORT} @10.53.0.2 txt enable > dig.out.test$n
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "TXT.\"1\"" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
# We give BIND some time to ensure that after we enable authoritative server,
# this RRset is still not refreshed because it was hit during
# stale-refresh-time window.
sleep 1
n=$((n+1))
ret=0
echo_i "check stale data.example was not refreshed (stale-answer-client-timeout 0 stale-refresh-time 4) ($n)"
nextpart ns3/named.run > /dev/null
$DIG -p ${PORT} @10.53.0.3 data.example TXT > dig.out.test$n
wait_for_log 5 "data.example query within stale refresh time" ns3/named.run || ret=1
grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "data\.example\..*3.*IN.*TXT.*A text record with a 2 second ttl" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
# After the refresh-time-window, the RRset will be refreshed.
sleep 4
n=$((n+1))
ret=0
echo_i "check stale data.example comes from cache (stale-answer-client-timeout 0 stale-refresh-time 4) ($n)"
$DIG -p ${PORT} @10.53.0.3 data.example TXT > dig.out.test$n
wait_for_log 5 "data.example stale answer used, an attempt to refresh the RRset" ns3/named.run || ret=1
grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "data\.example\..*3.*IN.*TXT.*A text record with a 2 second ttl" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
n=$((n+1))
ret=0
echo_i "check stale data.example was refreshed (stale-answer-client-timeout 0 stale-refresh-time 4) ($n)"
$DIG -p ${PORT} @10.53.0.3 data.example TXT > dig.out.test$n
grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
grep "data\.example\..*[12].*IN.*TXT.*A text record with a 2 second ttl" dig.out.test$n > /dev/null || ret=1
if [ $ret != 0 ]; then echo_i "failed"; fi
status=$((status+ret))
echo_i "exit status: $status"
[ $status -eq 0 ] || exit 1