From 48cafa77c502b8b2a7e6ed1b691466ea1c92a058 Mon Sep 17 00:00:00 2001 From: ozaki-r Date: Tue, 4 Oct 2016 04:15:25 +0000 Subject: [PATCH] Add tests for sysctl net.inet.ip.mtudisc From suzu-ken@IIJ --- distrib/sets/lists/tests/mi | 3 +- tests/net/net/Makefile | 3 +- tests/net/net/t_mtudisc.sh | 251 ++++++++++++++++++++++++++++++++++++ 3 files changed, 255 insertions(+), 2 deletions(-) create mode 100644 tests/net/net/t_mtudisc.sh diff --git a/distrib/sets/lists/tests/mi b/distrib/sets/lists/tests/mi index f4ad1f7b2338..63b21fc71d19 100644 --- a/distrib/sets/lists/tests/mi +++ b/distrib/sets/lists/tests/mi @@ -1,4 +1,4 @@ -# $NetBSD: mi,v 1.686 2016/09/05 02:26:48 ozaki-r Exp $ +# $NetBSD: mi,v 1.687 2016/10/04 04:15:25 ozaki-r Exp $ # # Note: don't delete entries from here - mark them as "obsolete" instead. # @@ -3243,6 +3243,7 @@ ./usr/tests/net/net/t_ipaddress tests-net-tests atf,rump ./usr/tests/net/net/t_ipv6address tests-net-tests atf,rump ./usr/tests/net/net/t_ipv6_lifetime tests-net-tests atf,rump +./usr/tests/net/net/t_mtudisc tests-net-tests atf,rump ./usr/tests/net/net/t_pktinfo tests-net-tests compattestfile,atf ./usr/tests/net/net/t_raw tests-net-tests atf,rump ./usr/tests/net/net/t_tcp tests-net-tests compattestfile,atf diff --git a/tests/net/net/Makefile b/tests/net/net/Makefile index a3a5e413c80e..796ec8ee7a92 100644 --- a/tests/net/net/Makefile +++ b/tests/net/net/Makefile @@ -1,4 +1,4 @@ -# $NetBSD: Makefile,v 1.15 2016/08/08 14:16:32 pgoyette Exp $ +# $NetBSD: Makefile,v 1.16 2016/10/04 04:15:25 ozaki-r Exp $ # .include @@ -15,6 +15,7 @@ TESTS_SH= t_forwarding TESTS_SH+= t_ipaddress TESTS_SH+= t_ipv6address TESTS_SH+= t_ipv6_lifetime +TESTS_SH+= t_mtudisc .endif LDADD.t_raw+= -lrumpnet_local -lrumpnet_netinet -lrumpnet_net -lrumpdev diff --git a/tests/net/net/t_mtudisc.sh b/tests/net/net/t_mtudisc.sh new file mode 100644 index 000000000000..43b9103762b7 --- /dev/null +++ b/tests/net/net/t_mtudisc.sh @@ -0,0 +1,251 @@ +# $NetBSD: t_mtudisc.sh,v 1.1 2016/10/04 04:15:25 ozaki-r Exp $ +# +# Copyright (c) 2016 Internet Initiative Japan Inc. +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# 1. Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# 2. Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in the +# documentation and/or other materials provided with the distribution. +# +# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS +# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED +# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR +# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS +# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR +# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN +# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +# POSSIBILITY OF SUCH DAMAGE. +# + +inetserver="rump_server -lrumpnet -lrumpnet_net -lrumpnet_netinet" +inetserver="$inetserver -lrumpnet_netinet6 -lrumpnet_shmif" +inetserver="$inetserver -lrumpdev" +HIJACKING="env LD_PRELOAD=/usr/lib/librumphijack.so RUMPHIJACK=sysctl=yes" + +SOCKLOCAL=unix://commsock1 +SOCKGATEWAY=unix://commsock2 +SOCKREMOTE=unix://commsock3 +HTTPD_PID=httpd.pid +HTML_FILE=index.html + +DEBUG=false + +atf_test_case mtudisc_basic cleanup + +mtudisc_basic_head() +{ + atf_set "descr" "Tests for IPv4 Path MTU Dicorvery basic behavior" + atf_set "require.progs" "rump_server" +} + +setup_server() +{ + local sock=$1 + local if=$2 + local bus=$3 + local ip=$4 + + export RUMP_SERVER=$sock + + atf_check -s exit:0 rump.ifconfig $if create + atf_check -s exit:0 rump.ifconfig $if linkstr $bus + atf_check -s exit:0 rump.ifconfig $if $ip + atf_check -s exit:0 rump.ifconfig $if up + atf_check -s exit:0 rump.ifconfig -w 10 + + $DEBUG && rump.ifconfig $if +} + +extract_new_packets() +{ + local bus=$1 + local old=./old + + if [ ! -f $old ]; then + old=/dev/null + fi + + shmif_dumpbus -p - $bus 2>/dev/null| \ + tcpdump -n -e -r - 2>/dev/null > ./new + diff -u $old ./new |grep '^+' |cut -d '+' -f 2 > ./diff + mv -f ./new ./old + cat ./diff +} + +setup_httpd() +{ + local sock=$1 + local ip=$2 + local data="0123456789" + + export RUMP_SERVER=$sock + + touch $HTML_FILE + for i in `seq 1 512` + do + echo $data >> $HTML_FILE + done + + # start httpd in daemon mode + atf_check -s exit:0 env LD_PRELOAD=/usr/lib/librumphijack.so \ + /usr/libexec/httpd -P $HTTPD_PID -i $ip -b -s $(pwd) + + $DEBUG && rump.netstat -a + + sleep 5 +} + +do_http_get() +{ + local ip=$1 + local ret=$2 + local timeout=5 + + # get the webpage + atf_check -s exit:$ret env LD_PRELOAD=/usr/lib/librumphijack.so \ + ftp -q $timeout -o ./out http://$ip/$HTML_FILE +} + +mtudisc_basic_body() +{ + local pkt= + local local_ip=10.0.0.2 + local gateway_local_ip=10.0.0.1 + local gateway_remote_ip=10.0.1.1 + local remote_ip=10.0.1.2 + local prefixlen=24 + + atf_check -s exit:0 ${inetserver} $SOCKLOCAL + atf_check -s exit:0 ${inetserver} $SOCKGATEWAY + atf_check -s exit:0 ${inetserver} $SOCKREMOTE + + # + # Setup servers + # + # [local server] [gateway server] [remote server with httpd] + # | 10.0.0.2 10.0.0.1 | | 10.0.1.1 10.0.1.2 | + # shmif0(mtu=1500) ----- shmif1(mtu=1280) shmif0(mtu=1500) ----- shmif0(mtu=1500) + # + + # Assign IP addresses + setup_server $SOCKLOCAL shmif0 bus1 $local_ip/$prefixlen + setup_server $SOCKGATEWAY shmif0 bus1 $gateway_local_ip/$prefixlen + setup_server $SOCKGATEWAY shmif1 bus2 $gateway_remote_ip/$prefixlen + setup_server $SOCKREMOTE shmif0 bus2 $remote_ip/$prefixlen + + ### Setup gateway server + export RUMP_SERVER=$SOCKGATEWAY + + # Set mtu of shmif0 to 1280 + export RUMP_SERVER=$SOCKGATEWAY + atf_check -s exit:0 rump.ifconfig shmif0 mtu 1280 + + # Enable IPv4 forwarding + atf_check -s exit:0 rump.sysctl -w -q net.inet.ip.forwarding=1 + + ### Setup remote server + export RUMP_SERVER=$SOCKREMOTE + + # Check default value + atf_check -s exit:0 -o match:"1" rump.sysctl -n net.inet.ip.mtudisc + + # Start httpd daemon + setup_httpd $SOCKREMOTE $remote_ip + + # Teach the peer thar 10.0.0.2(local serer) is behind 10.0.1.1(gateway server) + atf_check -s exit:0 -o ignore rump.route add $local_ip/32 $gateway_remote_ip + + ### Setup local server + export RUMP_SERVER=$SOCKLOCAL + + # Teach the peer thar 10.0.1.2(remote serer) is behind 10.0.0.1(gateway server) + atf_check -s exit:0 -o ignore rump.route add $remote_ip/32 $gateway_local_ip + + # Don't accept fragmented packets + atf_check -s exit:0 -o ignore rump.sysctl -w -q net.inet.ip.maxfragpackets=0 + + # + # Test disabled path mtu discorvery + # + export RUMP_SERVER=$SOCKREMOTE + atf_check -s exit:0 -o ignore rump.sysctl -w -q net.inet.ip.mtudisc=0 + + # Get the webpage (expect: failed) + export RUMP_SERVER=$SOCKLOCAL + do_http_get $remote_ip 1 + $DEBUG && extract_new_packets bus2 > ./out + $DEBUG && cat ./out + + # Check path mtu size on remote server + export RUMP_SERVER=$SOCKREMOTE + atf_check -s exit:0 \ + -o match:"^10.0.0.2 +10.0.1.1 +UGHS +- +- +- +shmif0" \ + rump.netstat -nr -f inet + + # + # Test enabled path mtu discorvery + # + export RUMP_SERVER=$SOCKREMOTE + atf_check -s exit:0 -o ignore rump.sysctl -w -q net.inet.ip.mtudisc=1 + + # Get the webpage (expect: success) + export RUMP_SERVER=$SOCKLOCAL + do_http_get $remote_ip 0 + $DEBUG && extract_new_packets bus2 > ./out + $DEBUG && cat ./out + + # Check path mtu size on remote server + export RUMP_SERVER=$SOCKREMOTE + atf_check -s exit:0 \ + -o match:"^10.0.0.2 +10.0.1.1 +UGHS +- +- +1280 +shmif0" \ + rump.netstat -nr -f inet +} + +cleanup() +{ + gdb -ex bt /usr/bin/rump_server rump_server.core + gdb -ex bt /usr/sbin/arp arp.core + env RUMP_SERVER=$SOCKLOCAL rump.halt + env RUMP_SERVER=$SOCKGATEWAY rump.halt + env RUMP_SERVER=$SOCKREMOTE rump.halt +} + +dump_server() +{ + local sock=$1 + export RUMP_SERVER=$sock + rump.netstat -nr + rump.arp -n -a + rump.ifconfig + $HIJACKING dmesg +} + +dump() +{ + dump_server $SOCKLOCAL + dump_server $SOCKGATEWAY + dump_server $SOCKREMOTE + shmif_dumpbus -p - bus1 2>/dev/null| tcpdump -n -e -r - + shmif_dumpbus -p - bus2 2>/dev/null| tcpdump -n -e -r - +} + +mtudisc_basic_cleanup() +{ + $DEBUG && dump + env RUMP_SERVER=$SOCKLOCAL rump.halt + env RUMP_SERVER=$SOCKGATEWAY rump.halt + env RUMP_SERVER=$SOCKREMOTE rump.halt +} + +atf_init_test_cases() +{ + atf_add_test_case mtudisc_basic +}