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-rw-r--r--bin/tests/system/tcp/tests.sh204
1 files changed, 204 insertions, 0 deletions
diff --git a/bin/tests/system/tcp/tests.sh b/bin/tests/system/tcp/tests.sh
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+++ b/bin/tests/system/tcp/tests.sh
@@ -0,0 +1,204 @@
+#!/bin/sh
+
+# 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.
+
+set -e
+
+SYSTEMTESTTOP=..
+# shellcheck source=../conf.sh
+. "$SYSTEMTESTTOP/conf.sh"
+
+dig_with_opts() {
+ "${DIG}" -p "${PORT}" "$@"
+}
+
+rndccmd() {
+ "${RNDC}" -p "${CONTROLPORT}" -c ../common/rndc.conf -s "$@"
+}
+
+status=0
+n=0
+
+n=$((n + 1))
+echo_i "initializing TCP statistics ($n)"
+ret=0
+rndccmd 10.53.0.1 stats || ret=1
+rndccmd 10.53.0.2 stats || ret=1
+mv ns1/named.stats ns1/named.stats.test$n
+mv ns2/named.stats ns2/named.stats.test$n
+ntcp10="$(grep "TCP requests received" ns1/named.stats.test$n | tail -1 | awk '{print $1}')"
+ntcp20="$(grep "TCP requests received" ns2/named.stats.test$n | tail -1 | awk '{print $1}')"
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n + 1))
+echo_i "checking TCP request statistics (resolver) ($n)"
+ret=0
+dig_with_opts @10.53.0.3 txt.example. > dig.out.test$n
+sleep 1
+rndccmd 10.53.0.1 stats || ret=1
+rndccmd 10.53.0.2 stats || ret=1
+mv ns1/named.stats ns1/named.stats.test$n
+mv ns2/named.stats ns2/named.stats.test$n
+ntcp11="$(grep "TCP requests received" ns1/named.stats.test$n | tail -1 | awk '{print $1}')"
+ntcp21="$(grep "TCP requests received" ns2/named.stats.test$n | tail -1 | awk '{print $1}')"
+if [ "$ntcp10" -ge "$ntcp11" ]; then ret=1; fi
+if [ "$ntcp20" -ne "$ntcp21" ]; then ret=1; fi
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+n=$((n + 1))
+echo_i "checking TCP request statistics (forwarder) ($n)"
+ret=0
+dig_with_opts @10.53.0.4 txt.example. > dig.out.test$n
+sleep 1
+rndccmd 10.53.0.1 stats || ret=1
+rndccmd 10.53.0.2 stats || ret=1
+mv ns1/named.stats ns1/named.stats.test$n
+mv ns2/named.stats ns2/named.stats.test$n
+ntcp12="$(grep "TCP requests received" ns1/named.stats.test$n | tail -1 | awk '{print $1}')"
+ntcp22="$(grep "TCP requests received" ns2/named.stats.test$n | tail -1 | awk '{print $1}')"
+if [ "$ntcp11" -ne "$ntcp12" ]; then ret=1; fi
+if [ "$ntcp21" -ge "$ntcp22" ];then ret=1; fi
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+# -------- TCP high-water tests ----------
+refresh_tcp_stats() {
+ rndccmd 10.53.0.5 status > rndc.out.$n || ret=1
+ TCP_CUR="$(sed -n "s/^tcp clients: \([0-9][0-9]*\).*/\1/p" rndc.out.$n)"
+ TCP_LIMIT="$(sed -n "s/^tcp clients: .*\/\([0-9][0-9]*\)/\1/p" rndc.out.$n)"
+ TCP_HIGH="$(sed -n "s/^TCP high-water: \([0-9][0-9]*\)/\1/p" rndc.out.$n)"
+}
+
+# Send a command to the tool script listening on 10.53.0.6.
+send_command() {
+ nextpart ans6/ans.run > /dev/null
+ echo "$*" | "${PERL}" "${SYSTEMTESTTOP}/send.pl" 10.53.0.6 "${CONTROLPORT}"
+ wait_for_log_peek 10 "result=" ans6/ans.run || ret=1
+ if ! nextpartpeek ans6/ans.run | grep -qF "result=OK"; then
+ return 1
+ fi
+}
+
+# Instructs ans6 to open $1 TCP connections to 10.53.0.5.
+open_connections() {
+ send_command "open" "${1}" 10.53.0.5 "${PORT}" || return 1
+}
+
+# Instructs ans6 to close $1 TCP connections to 10.53.0.5.
+close_connections() {
+ send_command "close" "${1}" || return 1
+}
+
+# Check TCP connections are working normally before opening
+# multiple connections
+n=$((n + 1))
+echo_i "checking TCP query repsonse ($n)"
+ret=0
+dig_with_opts +tcp @10.53.0.5 txt.example > dig.out.test$n
+grep "status: NXDOMAIN" dig.out.test$n > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+# Check TCP statistics after server startup before using them as a baseline for
+# subsequent checks.
+n=$((n + 1))
+echo_i "TCP high-water: check initial statistics ($n)"
+ret=0
+refresh_tcp_stats
+assert_int_equal "${TCP_CUR}" 0 "current TCP clients count" || ret=1
+# We compare initial tcp-highwater value with 1 because as part of the
+# system test startup, the script start.pl executes dig to check if target
+# named is running, and that increments tcp-quota by one.
+assert_int_equal "${TCP_HIGH}" 1 "tcp-highwater count" || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+# Ensure the TCP high-water statistic gets updated after some TCP connections
+# are established.
+n=$((n + 1))
+echo_i "TCP high-water: check value after some TCP connections are established ($n)"
+ret=0
+OLD_TCP_CUR="${TCP_CUR}"
+TCP_ADDED=9
+open_connections "${TCP_ADDED}" || ret=1
+check_stats_added() {
+ refresh_tcp_stats
+ assert_int_equal "${TCP_CUR}" $((OLD_TCP_CUR + TCP_ADDED)) "current TCP clients count" || return 1
+ assert_int_equal "${TCP_HIGH}" $((OLD_TCP_CUR + TCP_ADDED)) "TCP high-water value" || return 1
+}
+retry 2 check_stats_added || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+# Ensure the TCP high-water statistic remains unchanged after some TCP
+# connections are closed.
+n=$((n + 1))
+echo_i "TCP high-water: check value after some TCP connections are closed ($n)"
+ret=0
+OLD_TCP_CUR="${TCP_CUR}"
+OLD_TCP_HIGH="${TCP_HIGH}"
+TCP_REMOVED=5
+close_connections "${TCP_REMOVED}" || ret=1
+check_stats_removed() {
+ refresh_tcp_stats
+ assert_int_equal "${TCP_CUR}" $((OLD_TCP_CUR - TCP_REMOVED)) "current TCP clients count" || return 1
+ assert_int_equal "${TCP_HIGH}" "${OLD_TCP_HIGH}" "TCP high-water value" || return 1
+}
+retry 2 check_stats_removed || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+# Ensure the TCP high-water statistic never exceeds the configured TCP clients
+# limit.
+n=$((n + 1))
+echo_i "TCP high-water: ensure tcp-clients is an upper bound ($n)"
+ret=0
+open_connections $((TCP_LIMIT + 1)) || ret=1
+check_stats_limit() {
+ refresh_tcp_stats
+ assert_int_equal "${TCP_CUR}" "${TCP_LIMIT}" "current TCP clients count" || return 1
+ assert_int_equal "${TCP_HIGH}" "${TCP_LIMIT}" "TCP high-water value" || return 1
+}
+retry 2 check_stats_limit || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+# Check TCP connections are working normally before opening
+# multiple connections
+n=$((n + 1))
+echo_i "checking TCP response recovery ($n)"
+ret=0
+# "0" closes all connections
+close_connections 0 || ret=1
+dig_with_opts +tcp @10.53.0.5 txt.example > dig.out.test$n || ret=1
+grep "status: NXDOMAIN" dig.out.test$n > /dev/null || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+####################################################
+# NOTE: The next test resets the debug level to 1. #
+####################################################
+
+n=$((n + 1))
+echo_i "checking that BIND 9 doesn't crash on long TCP messages ($n)"
+ret=0
+# Avoid logging useless information.
+rndccmd 10.53.0.1 trace 1 || ret=1
+{ $PERL ../packet.pl -a "10.53.0.1" -p "${PORT}" -t tcp -r 300000 1996-alloc_dnsbuf-crash-test.pkt || ret=1 ; } | cat_i
+dig_with_opts +tcp @10.53.0.1 txt.example > dig.out.test$n || ret=1
+if [ $ret != 0 ]; then echo_i "failed"; fi
+status=$((status + ret))
+
+echo_i "exit status: $status"
+[ $status -eq 0 ] || exit 1