t_mtudisc6.sh revision 313535 
1#	$NetBSD: t_mtudisc6.sh,v 1.5 2016/11/25 08:51:17 ozaki-r Exp $
2#
3# Copyright (c) 2016 Internet Initiative Japan Inc.
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15# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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26#
27
28SOCKLOCAL=unix://commsock1
29SOCKGATEWAY=unix://commsock2
30SOCKREMOTE=unix://commsock3
31HTML_FILE=index.html
32
33DEBUG=${DEBUG:-false}
34
35atf_test_case mtudisc6_basic cleanup
36
37mtudisc6_basic_head()
38{
39
40	atf_set "descr" "Tests for IPv6 Path MTU Dicorvery basic behavior"
41	atf_set "require.progs" "rump_server"
42}
43
44setup_server()
45{
46	local sock=$1
47	local if=$2
48	local bus=$3
49	local ip=$4
50
51	rump_server_add_iface $sock $if $bus
52
53	export RUMP_SERVER=$sock
54	atf_check -s exit:0 rump.ifconfig $if inet6 $ip
55	atf_check -s exit:0 rump.ifconfig $if up
56	atf_check -s exit:0 rump.ifconfig -w 10
57
58	$DEBUG && rump.ifconfig $if
59}
60
61prepare_download_file()
62{
63	local file=$1
64	local data="0123456789"
65
66	touch $file
67	for i in `seq 1 512`
68	do
69		echo $data >> $file
70	done
71}
72
73do_http_get()
74{
75	local ip=$1
76	local ret=$2
77	local timeout=5
78
79	# get the webpage
80	atf_check -s exit:$ret env LD_PRELOAD=/usr/lib/librumphijack.so	\
81	    ftp -q $timeout -o ./out "http://[$ip]/$HTML_FILE"
82}
83
84mtudisc6_basic_body()
85{
86	local pkt=
87	local local_ip=fc00:0:0:1::2
88	local gateway_local_ip=fc00:0:0:1::1
89	local gateway_remote_ip=fc00:0:0:2::1
90	local remote_ip=fc00:0:0:2::2
91	local prefixlen=64
92
93	rump_server_start $SOCKLOCAL netinet6
94	rump_server_start $SOCKGATEWAY netinet6
95	rump_server_start $SOCKREMOTE netinet6
96
97	#
98	# Setup servers
99	#
100	# [local server]       [gateway server]      [remote server]
101	#       |                 |        |                |
102	# shmif0(1500) -- shmif1(1280)  shmif0(1500) -- shmif0(1500)
103	#
104
105	# Assign IP addresses
106	setup_server $SOCKLOCAL shmif0 bus1 $local_ip/$prefixlen
107	setup_server $SOCKGATEWAY shmif0 bus1 $gateway_local_ip/$prefixlen
108	setup_server $SOCKGATEWAY shmif1 bus2 $gateway_remote_ip/$prefixlen
109	setup_server $SOCKREMOTE shmif0 bus2 $remote_ip/$prefixlen
110
111	### Setup gateway server
112	export RUMP_SERVER=$SOCKGATEWAY
113
114	# Set MTU of shmif0 to 1280
115	export RUMP_SERVER=$SOCKGATEWAY
116	atf_check -s exit:0 rump.ifconfig shmif0 mtu 1280
117
118	# Enable IPv6 forwarding
119	atf_check -s exit:0 rump.sysctl -w -q net.inet6.ip6.forwarding=1
120
121	### Setup remote server
122	export RUMP_SERVER=$SOCKREMOTE
123
124	# Start httpd daemon
125	prepare_download_file $HTML_FILE
126	start_httpd $SOCKREMOTE $remote_ip
127	$DEBUG && rump.netstat -a
128
129	# Teach the peer that local serer is behind gateway server
130	atf_check -s exit:0 -o ignore \
131	    rump.route add -inet6 $local_ip/128 $gateway_remote_ip
132
133	# Check path MTU size on remote server
134	atf_check -s exit:0 \
135	    -o match:"^$local_ip +$gateway_remote_ip +UGHS +- +- +- +shmif0" \
136	    rump.netstat -nr -f inet6
137
138	### Setup local server
139	export RUMP_SERVER=$SOCKLOCAL
140
141	# Teach the peer that remote serer is behind gateway server
142	atf_check -s exit:0 -o ignore \
143	    rump.route add -inet6 $remote_ip/128 $gateway_local_ip
144
145	# Don't accept fragmented packets
146	atf_check -s exit:0 -o ignore \
147	    rump.sysctl -w -q net.inet6.ip6.maxfragpackets=0
148
149	#
150	# Test enabled path MTU discorvery
151	#
152	# Get the webpage (expect: success)
153	export RUMP_SERVER=$SOCKLOCAL
154	do_http_get $remote_ip 0
155	$DEBUG && extract_new_packets bus2 > ./out
156	$DEBUG && cat ./out
157
158	# Check path MTU size on remote server
159	export RUMP_SERVER=$SOCKREMOTE
160	atf_check -s exit:0 \
161	    -o match:"^$local_ip +$gateway_remote_ip +UGHS +- +- +1280 +shmif0" \
162	    rump.netstat -nr -f inet6
163
164	rump_server_destroy_ifaces
165}
166
167mtudisc6_basic_cleanup()
168{
169
170	$DEBUG && dump
171	stop_httpd
172	cleanup
173}
174
175atf_init_test_cases()
176{
177
178	atf_add_test_case mtudisc6_basic
179}
180