xref: /linux/tools/testing/selftests/net/amt.sh (revision 61f96e684edd28ca40555ec49ea1555df31ba619) 
1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3
4# Author: Taehee Yoo <ap420073@gmail.com>
5#
6# This script evaluates the AMT driver.
7# There are four network-namespaces, LISTENER, SOURCE, GATEWAY, RELAY.
8# The role of LISTENER is to listen multicast traffic.
9# In order to do that, it send IGMP group join message.
10# The role of SOURCE is to send multicast traffic to listener.
11# The role of GATEWAY is to work Gateway role of AMT interface.
12# The role of RELAY is to work Relay role of AMT interface.
13#
14#
15#       +------------------------+
16#       |    LISTENER netns      |
17#       |                        |
18#       |  +------------------+  |
19#       |  |       l_gw       |  |
20#       |  |  192.168.0.2/24  |  |
21#       |  |  2001:db8::2/64  |  |
22#       |  +------------------+  |
23#       |            .           |
24#       +------------------------+
25#                    .
26#                    .
27#       +-----------------------------------------------------+
28#       |            .         GATEWAY netns                  |
29#       |            .                                        |
30#       |+---------------------------------------------------+|
31#       ||           .          br0                          ||
32#       || +------------------+       +------------------+   ||
33#       || |       gw_l       |       |       amtg       |   ||
34#       || |  192.168.0.1/24  |       +--------+---------+   ||
35#       || |  2001:db8::1/64  |                |             ||
36#       || +------------------+                |             ||
37#       |+-------------------------------------|-------------+|
38#       |                                      |              |
39#       |                             +--------+---------+    |
40#       |                             |     gw_relay     |    |
41#       |                             |    10.0.0.1/24   |    |
42#       |                             +------------------+    |
43#       |                                      .              |
44#       +-----------------------------------------------------+
45#                                              .
46#                                              .
47#       +-----------------------------------------------------+
48#       |                       RELAY netns    .              |
49#       |                             +------------------+    |
50#       |                             |     relay_gw     |    |
51#       |                             |    10.0.0.2/24   |    |
52#       |                             +--------+---------+    |
53#       |                                      |              |
54#       |                                      |              |
55#       |  +------------------+       +--------+---------+    |
56#       |  |     relay_src    |       |       amtr       |    |
57#       |  |   172.17.0.1/24  |       +------------------+    |
58#       |  | 2001:db8:3::1/64 |                               |
59#       |  +------------------+                               |
60#       |            .                                        |
61#       |            .                                        |
62#       +-----------------------------------------------------+
63#                    .
64#                    .
65#       +------------------------+
66#       |            .           |
67#       |  +------------------+  |
68#       |  |     src_relay    |  |
69#       |  |   172.17.0.2/24  |  |
70#       |  | 2001:db8:3::2/64 |  |
71#       |  +------------------+  |
72#       |      SOURCE netns      |
73#       +------------------------+
74#==============================================================================
75
76readonly LISTENER=$(mktemp -u listener-XXXXXXXX)
77readonly GATEWAY=$(mktemp -u gateway-XXXXXXXX)
78readonly RELAY=$(mktemp -u relay-XXXXXXXX)
79readonly SOURCE=$(mktemp -u source-XXXXXXXX)
80readonly SMCROUTEDIR="$(mktemp -d)"
81ERR=4
82err=0
83
84exit_cleanup()
85{
86	for ns in "$@"; do
87		ip netns delete "${ns}" 2>/dev/null || true
88	done
89	if [ -f "$SMCROUTEDIR/amt.pid" ]; then
90		smcpid=$(< $SMCROUTEDIR/amt.pid)
91		kill $smcpid
92	fi
93	rm -rf $SMCROUTEDIR
94
95	exit $ERR
96}
97
98create_namespaces()
99{
100	ip netns add "${LISTENER}" || exit_cleanup
101	ip netns add "${GATEWAY}" || exit_cleanup "${LISTENER}"
102	ip netns add "${RELAY}" || exit_cleanup "${LISTENER}" "${GATEWAY}"
103	ip netns add "${SOURCE}" || exit_cleanup "${LISTENER}" "${GATEWAY}" \
104		"${RELAY}"
105}
106
107# The trap function handler
108#
109exit_cleanup_all()
110{
111	exit_cleanup "${LISTENER}" "${GATEWAY}" "${RELAY}" "${SOURCE}"
112}
113
114setup_interface()
115{
116	for ns in "${LISTENER}" "${GATEWAY}" "${RELAY}" "${SOURCE}"; do
117		ip -netns "${ns}" link set dev lo up
118	done;
119
120	ip link add l_gw type veth peer name gw_l
121	ip link add gw_relay type veth peer name relay_gw
122	ip link add relay_src type veth peer name src_relay
123
124	ip link set l_gw netns "${LISTENER}" up
125	ip link set gw_l netns "${GATEWAY}" up
126	ip link set gw_relay netns "${GATEWAY}" up
127	ip link set relay_gw netns "${RELAY}" up
128	ip link set relay_src netns "${RELAY}" up
129	ip link set src_relay netns "${SOURCE}" up mtu 1400
130
131	ip netns exec "${LISTENER}" ip a a 192.168.0.2/24 dev l_gw
132	ip netns exec "${LISTENER}" ip r a default via 192.168.0.1 dev l_gw
133	ip netns exec "${LISTENER}" ip a a 2001:db8::2/64 dev l_gw
134	ip netns exec "${LISTENER}" ip r a default via 2001:db8::1 dev l_gw
135	ip netns exec "${LISTENER}" ip a a 239.0.0.1/32 dev l_gw autojoin
136	ip netns exec "${LISTENER}" ip a a ff0e::5:6/128 dev l_gw autojoin
137
138	ip netns exec "${GATEWAY}" ip a a 192.168.0.1/24 dev gw_l
139	ip netns exec "${GATEWAY}" ip a a 2001:db8::1/64 dev gw_l
140	ip netns exec "${GATEWAY}" ip a a 10.0.0.1/24 dev gw_relay
141	ip netns exec "${GATEWAY}" ip link add br0 type bridge
142	ip netns exec "${GATEWAY}" ip link set br0 up
143	ip netns exec "${GATEWAY}" ip link set gw_l master br0
144	ip netns exec "${GATEWAY}" ip link set gw_l up
145	ip netns exec "${GATEWAY}" ip link add amtg master br0 type amt \
146		mode gateway local 10.0.0.1 discovery 10.0.0.2 dev gw_relay \
147		gateway_port 2268 relay_port 2268
148	ip netns exec "${RELAY}" ip a a 10.0.0.2/24 dev relay_gw
149	ip netns exec "${RELAY}" ip link add amtr type amt mode relay \
150		local 10.0.0.2 dev relay_gw relay_port 2268 max_tunnels 4
151	ip netns exec "${RELAY}" ip a a 172.17.0.1/24 dev relay_src
152	ip netns exec "${RELAY}" ip a a 2001:db8:3::1/64 dev relay_src
153	ip netns exec "${SOURCE}" ip a a 172.17.0.2/24 dev src_relay
154	ip netns exec "${SOURCE}" ip a a 2001:db8:3::2/64 dev src_relay
155	ip netns exec "${SOURCE}" ip r a default via 172.17.0.1 dev src_relay
156	ip netns exec "${SOURCE}" ip r a default via 2001:db8:3::1 dev src_relay
157	ip netns exec "${RELAY}" ip link set amtr up
158	ip netns exec "${GATEWAY}" ip link set amtg up
159}
160
161setup_sysctl()
162{
163	ip netns exec "${RELAY}" sysctl net.ipv4.ip_forward=1 -w -q
164}
165
166setup_iptables()
167{
168	ip netns exec "${RELAY}" iptables -t mangle -I PREROUTING \
169		-d 239.0.0.1 -j TTL --ttl-set 2
170	ip netns exec "${RELAY}" ip6tables -t mangle -I PREROUTING \
171		-j HL --hl-set 2
172}
173
174setup_mcast_routing()
175{
176	ip netns exec "${RELAY}" smcrouted -P $SMCROUTEDIR/amt.pid
177	ip netns exec "${RELAY}" smcroutectl a relay_src \
178		172.17.0.2 239.0.0.1 amtr
179	ip netns exec "${RELAY}" smcroutectl a relay_src \
180		2001:db8:3::2 ff0e::5:6 amtr
181}
182
183test_remote_ip()
184{
185	REMOTE=$(ip netns exec "${GATEWAY}" \
186		ip -d -j link show amtg | jq .[0].linkinfo.info_data.remote)
187	if [ $REMOTE == "\"10.0.0.2\"" ]; then
188		printf "TEST: %-60s  [ OK ]\n" "amt discovery"
189	else
190		printf "TEST: %-60s  [FAIL]\n" "amt discovery"
191		ERR=1
192	fi
193}
194
195send_mcast_torture4()
196{
197	for i in `seq 10`; do
198		ip netns exec "${SOURCE}" bash -c \
199		   'cat /dev/urandom | head -c 100M | nc -w 1 -u 239.0.0.1 4001'
200		echo -n "."
201	done
202}
203
204
205send_mcast_torture6()
206{
207	for i in `seq 10`; do
208		ip netns exec "${SOURCE}" bash -c \
209		   'cat /dev/urandom | head -c 100M | nc -w 1 -u ff0e::5:6 6001'
210		echo -n "."
211	done
212}
213
214check_features()
215{
216        ip link help 2>&1 | grep -q amt
217        if [ $? -ne 0 ]; then
218                echo "Missing amt support in iproute2" >&2
219                exit_cleanup
220        fi
221}
222
223test_ipv4_forward()
224{
225	RESULT4=$(ip netns exec "${LISTENER}" timeout 15 socat - UDP4-LISTEN:4000,readbytes=128 || true)
226	if echo "$RESULT4" | grep -q "172.17.0.2"; then
227		printf "TEST: %-60s  [ OK ]\n" "IPv4 amt multicast forwarding"
228		exit 0
229	else
230		printf "TEST: %-60s  [FAIL]\n" "IPv4 amt multicast forwarding"
231		exit 1
232	fi
233}
234
235test_ipv6_forward()
236{
237	RESULT6=$(ip netns exec "${LISTENER}" timeout 15 socat - UDP6-LISTEN:6000,readbytes=128 || true)
238	if echo "$RESULT6" | grep -q "2001:db8:3::2"; then
239		printf "TEST: %-60s  [ OK ]\n" "IPv6 amt multicast forwarding"
240		exit 0
241	else
242		printf "TEST: %-60s  [FAIL]\n" "IPv6 amt multicast forwarding"
243		exit 1
244	fi
245}
246
247send_mcast4()
248{
249	sleep 2
250	ip netns exec "${SOURCE}" bash -c \
251		'printf "%s %128s" 172.17.0.2 | nc -w 1 -u 239.0.0.1 4000' &
252}
253
254send_mcast6()
255{
256	sleep 2
257	ip netns exec "${SOURCE}" bash -c \
258		'printf "%s %128s" 2001:db8:3::2 | nc -w 1 -u ff0e::5:6 6000' &
259}
260
261check_features
262
263create_namespaces
264
265set -e
266trap exit_cleanup_all EXIT
267
268setup_interface
269setup_sysctl
270setup_iptables
271setup_mcast_routing
272test_remote_ip
273test_ipv4_forward &
274pid=$!
275send_mcast4
276wait $pid || err=$?
277if [ $err -eq 1 ]; then
278	ERR=1
279fi
280test_ipv6_forward &
281pid=$!
282send_mcast6
283wait $pid || err=$?
284if [ $err -eq 1 ]; then
285	ERR=1
286fi
287printf "TEST: %-50s" "IPv4 amt traffic forwarding torture"
288send_mcast_torture4
289printf "  [ OK ]\n"
290printf "TEST: %-50s" "IPv6 amt traffic forwarding torture"
291send_mcast_torture6
292printf "  [ OK ]\n"
293sleep 5
294if [ "${ERR}" -eq 1 ]; then
295        echo "Some tests failed." >&2
296else
297        ERR=0
298fi
299