#!/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