summaryrefslogtreecommitdiff
path: root/tools/testing/selftests/net/traceroute.sh
blob: 282f14760940dd7acd56513ae3686ca6c4bfa932 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# Run traceroute/traceroute6 tests
#

source lib.sh
VERBOSE=0
PAUSE_ON_FAIL=no

################################################################################
#
log_test()
{
	local rc=$1
	local expected=$2
	local msg="$3"

	if [ ${rc} -eq ${expected} ]; then
		printf "TEST: %-60s  [ OK ]\n" "${msg}"
		nsuccess=$((nsuccess+1))
	else
		ret=1
		nfail=$((nfail+1))
		printf "TEST: %-60s  [FAIL]\n" "${msg}"
		if [ "${PAUSE_ON_FAIL}" = "yes" ]; then
			echo
			echo "hit enter to continue, 'q' to quit"
			read a
			[ "$a" = "q" ] && exit 1
		fi
	fi
}

run_cmd()
{
	local ns
	local cmd
	local out
	local rc

	ns="$1"
	shift
	cmd="$*"

	if [ "$VERBOSE" = "1" ]; then
		printf "    COMMAND: $cmd\n"
	fi

	out=$(eval ip netns exec ${ns} ${cmd} 2>&1)
	rc=$?
	if [ "$VERBOSE" = "1" -a -n "$out" ]; then
		echo "    $out"
	fi

	[ "$VERBOSE" = "1" ] && echo

	return $rc
}

################################################################################
# create namespaces and interconnects

create_ns()
{
	local ns=$1
	local addr=$2
	local addr6=$3

	[ -z "${addr}" ] && addr="-"
	[ -z "${addr6}" ] && addr6="-"

	if [ "${addr}" != "-" ]; then
		ip netns exec ${ns} ip addr add dev lo ${addr}
	fi
	if [ "${addr6}" != "-" ]; then
		ip netns exec ${ns} ip -6 addr add dev lo ${addr6}
	fi

	ip netns exec ${ns} ip ro add unreachable default metric 8192
	ip netns exec ${ns} ip -6 ro add unreachable default metric 8192

	ip netns exec ${ns} sysctl -qw net.ipv4.ip_forward=1
	ip netns exec ${ns} sysctl -qw net.ipv6.conf.all.keep_addr_on_down=1
	ip netns exec ${ns} sysctl -qw net.ipv6.conf.all.forwarding=1
	ip netns exec ${ns} sysctl -qw net.ipv6.conf.default.forwarding=1
	ip netns exec ${ns} sysctl -qw net.ipv6.conf.default.accept_dad=0
}

# create veth pair to connect namespaces and apply addresses.
connect_ns()
{
	local ns1=$1
	local ns1_dev=$2
	local ns1_addr=$3
	local ns1_addr6=$4
	local ns2=$5
	local ns2_dev=$6
	local ns2_addr=$7
	local ns2_addr6=$8

	ip netns exec ${ns1} ip li add ${ns1_dev} type veth peer name tmp
	ip netns exec ${ns1} ip li set ${ns1_dev} up
	ip netns exec ${ns1} ip li set tmp netns ${ns2} name ${ns2_dev}
	ip netns exec ${ns2} ip li set ${ns2_dev} up

	if [ "${ns1_addr}" != "-" ]; then
		ip netns exec ${ns1} ip addr add dev ${ns1_dev} ${ns1_addr}
	fi

	if [ "${ns2_addr}" != "-" ]; then
		ip netns exec ${ns2} ip addr add dev ${ns2_dev} ${ns2_addr}
	fi

	if [ "${ns1_addr6}" != "-" ]; then
		ip netns exec ${ns1} ip addr add dev ${ns1_dev} ${ns1_addr6}
	fi

	if [ "${ns2_addr6}" != "-" ]; then
		ip netns exec ${ns2} ip addr add dev ${ns2_dev} ${ns2_addr6}
	fi
}

################################################################################
# traceroute6 test
#
# Verify that in this scenario
#
#        ------------------------ N2
#         |                    |
#       ------              ------  N3  ----
#       | R1 |              | R2 |------|H2|
#       ------              ------      ----
#         |                    |
#        ------------------------ N1
#                  |
#                 ----
#                 |H1|
#                 ----
#
# where H1's default route goes through R1 and R1's default route goes
# through R2 over N2, traceroute6 from H1 to H2 reports R2's address
# on N2 and not N1.
#
# Addresses are assigned as follows:
#
# N1: 2000:101::/64
# N2: 2000:102::/64
# N3: 2000:103::/64
#
# R1's host part of address: 1
# R2's host part of address: 2
# H1's host part of address: 3
# H2's host part of address: 4
#
# For example:
# the IPv6 address of R1's interface on N2 is 2000:102::1/64

cleanup_traceroute6()
{
	cleanup_ns $h1 $h2 $r1 $r2
}

setup_traceroute6()
{
	brdev=br0

	# start clean
	cleanup_traceroute6

	set -e
	setup_ns h1 h2 r1 r2
	create_ns $h1
	create_ns $h2
	create_ns $r1
	create_ns $r2

	# Setup N3
	connect_ns $r2 eth3 - 2000:103::2/64 $h2 eth3 - 2000:103::4/64
	ip netns exec $h2 ip route add default via 2000:103::2

	# Setup N2
	connect_ns $r1 eth2 - 2000:102::1/64 $r2 eth2 - 2000:102::2/64
	ip netns exec $r1 ip route add default via 2000:102::2

	# Setup N1. host-1 and router-2 connect to a bridge in router-1.
	ip netns exec $r1 ip link add name ${brdev} type bridge
	ip netns exec $r1 ip link set ${brdev} up
	ip netns exec $r1 ip addr add 2000:101::1/64 dev ${brdev}

	connect_ns $h1 eth0 - 2000:101::3/64 $r1 eth0 - -
	ip netns exec $r1 ip link set dev eth0 master ${brdev}
	ip netns exec $h1 ip route add default via 2000:101::1

	connect_ns $r2 eth1 - 2000:101::2/64 $r1 eth1 - -
	ip netns exec $r1 ip link set dev eth1 master ${brdev}

	# Prime the network
	ip netns exec $h1 ping6 -c5 2000:103::4 >/dev/null 2>&1

	set +e
}

run_traceroute6()
{
	if [ ! -x "$(command -v traceroute6)" ]; then
		echo "SKIP: Could not run IPV6 test without traceroute6"
		return
	fi

	setup_traceroute6

	# traceroute6 host-2 from host-1 (expects 2000:102::2)
	run_cmd $h1 "traceroute6 2000:103::4 | grep -q 2000:102::2"
	log_test $? 0 "IPV6 traceroute"

	cleanup_traceroute6
}

################################################################################
# traceroute test
#
# Verify that traceroute from H1 to H2 shows 1.0.1.1 in this scenario
#
#                    1.0.3.1/24
# ---- 1.0.1.3/24    1.0.1.1/24 ---- 1.0.2.1/24    1.0.2.4/24 ----
# |H1|--------------------------|R1|--------------------------|H2|
# ----            N1            ----            N2            ----
#
# where net.ipv4.icmp_errors_use_inbound_ifaddr is set on R1 and
# 1.0.3.1/24 and 1.0.1.1/24 are respectively R1's primary and secondary
# address on N1.
#

cleanup_traceroute()
{
	cleanup_ns $h1 $h2 $router
}

setup_traceroute()
{
	# start clean
	cleanup_traceroute

	set -e
	setup_ns h1 h2 router
	create_ns $h1
	create_ns $h2
	create_ns $router

	connect_ns $h1 eth0 1.0.1.3/24 - \
	           $router eth1 1.0.3.1/24 -
	ip netns exec $h1 ip route add default via 1.0.1.1

	ip netns exec $router ip addr add 1.0.1.1/24 dev eth1
	ip netns exec $router sysctl -qw \
				net.ipv4.icmp_errors_use_inbound_ifaddr=1

	connect_ns $h2 eth0 1.0.2.4/24 - \
	           $router eth2 1.0.2.1/24 -
	ip netns exec $h2 ip route add default via 1.0.2.1

	# Prime the network
	ip netns exec $h1 ping -c5 1.0.2.4 >/dev/null 2>&1

	set +e
}

run_traceroute()
{
	if [ ! -x "$(command -v traceroute)" ]; then
		echo "SKIP: Could not run IPV4 test without traceroute"
		return
	fi

	setup_traceroute

	# traceroute host-2 from host-1 (expects 1.0.1.1). Takes a while.
	run_cmd $h1 "traceroute 1.0.2.4 | grep -q 1.0.1.1"
	log_test $? 0 "IPV4 traceroute"

	cleanup_traceroute
}

################################################################################
# Run tests

run_tests()
{
	run_traceroute6
	run_traceroute
}

################################################################################
# main

declare -i nfail=0
declare -i nsuccess=0

while getopts :pv o
do
	case $o in
		p) PAUSE_ON_FAIL=yes;;
		v) VERBOSE=$(($VERBOSE + 1));;
		*) exit 1;;
	esac
done

run_tests

printf "\nTests passed: %3d\n" ${nsuccess}
printf "Tests failed: %3d\n"   ${nfail}