1 #!/bin/bash
2 # SPDX-License-Identifier: GPL-2.0
3 #
4 # L2TPv3 tunnel between 2 hosts
5 #
6 # host-1 | router | host-2
7 # | |
8 # lo l2tp | | l2tp lo
9 # 172.16.101.1 172.16.1.1 | | 172.16.1.2 172.16.101.2
10 # fc00:101::1 fc00:1::1 | | fc00:1::2 fc00:101::2
11 # | |
12 # eth0 | | eth0
13 # 10.1.1.1 | | 10.1.2.1
14 # 2001:db8:1::1 | | 2001:db8:2::1
15
16 source lib.sh
17 VERBOSE=0
18 PAUSE_ON_FAIL=no
19
20 which ping6 > /dev/null 2>&1 && ping6=$(which ping6) || ping6=$(which ping)
21
22 ################################################################################
23 #
24 log_test()
25 {
26 local rc=$1
27 local expected=$2
28 local msg="$3"
29
30 if [ ${rc} -eq ${expected} ]; then
31 printf "TEST: %-60s [ OK ]\n" "${msg}"
32 nsuccess=$((nsuccess+1))
33 else
34 ret=1
35 nfail=$((nfail+1))
36 printf "TEST: %-60s [FAIL]\n" "${msg}"
37 if [ "${PAUSE_ON_FAIL}" = "yes" ]; then
38 echo
39 echo "hit enter to continue, 'q' to quit"
40 read a
41 [ "$a" = "q" ] && exit 1
42 fi
43 fi
44 }
45
46 run_cmd()
47 {
48 local ns
49 local cmd
50 local out
51 local rc
52
53 ns="$1"
54 shift
55 cmd="$*"
56
57 if [ "$VERBOSE" = "1" ]; then
58 printf " COMMAND: $cmd\n"
59 fi
60
61 out=$(eval ip netns exec ${ns} ${cmd} 2>&1)
62 rc=$?
63 if [ "$VERBOSE" = "1" -a -n "$out" ]; then
64 echo " $out"
65 fi
66
67 [ "$VERBOSE" = "1" ] && echo
68
69 return $rc
70 }
71
72 ################################################################################
73 # create namespaces and interconnects
74
75 create_ns()
76 {
77 local ns=$1
78 local addr=$2
79 local addr6=$3
80
81 [ -z "${addr}" ] && addr="-"
82 [ -z "${addr6}" ] && addr6="-"
83
84 if [ "${addr}" != "-" ]; then
85 ip -netns ${ns} addr add dev lo ${addr}
86 fi
87 if [ "${addr6}" != "-" ]; then
88 ip -netns ${ns} -6 addr add dev lo ${addr6}
89 fi
90
91 ip -netns ${ns} ro add unreachable default metric 8192
92 ip -netns ${ns} -6 ro add unreachable default metric 8192
93
94 ip netns exec ${ns} sysctl -qw net.ipv4.ip_forward=1
95 ip netns exec ${ns} sysctl -qw net.ipv6.conf.all.keep_addr_on_down=1
96 ip netns exec ${ns} sysctl -qw net.ipv6.conf.all.forwarding=1
97 ip netns exec ${ns} sysctl -qw net.ipv6.conf.default.forwarding=1
98 ip netns exec ${ns} sysctl -qw net.ipv6.conf.default.accept_dad=0
99 }
100
101 # create veth pair to connect namespaces and apply addresses.
102 connect_ns()
103 {
104 local ns1=$1
105 local ns1_dev=$2
106 local ns1_addr=$3
107 local ns1_addr6=$4
108 local ns2=$5
109 local ns2_dev=$6
110 local ns2_addr=$7
111 local ns2_addr6=$8
112
113 ip -netns ${ns1} li add ${ns1_dev} type veth peer name tmp
114 ip -netns ${ns1} li set ${ns1_dev} up
115 ip -netns ${ns1} li set tmp netns ${ns2} name ${ns2_dev}
116 ip -netns ${ns2} li set ${ns2_dev} up
117
118 if [ "${ns1_addr}" != "-" ]; then
119 ip -netns ${ns1} addr add dev ${ns1_dev} ${ns1_addr}
120 ip -netns ${ns2} addr add dev ${ns2_dev} ${ns2_addr}
121 fi
122
123 if [ "${ns1_addr6}" != "-" ]; then
124 ip -netns ${ns1} addr add dev ${ns1_dev} ${ns1_addr6}
125 ip -netns ${ns2} addr add dev ${ns2_dev} ${ns2_addr6}
126 fi
127 }
128
129 ################################################################################
130 # test setup
131
132 cleanup()
133 {
134 cleanup_ns $host_1 $host_2 $router
135 }
136
137 setup_l2tp_ipv4()
138 {
139 #
140 # configure l2tpv3 tunnel on host-1
141 #
142 ip -netns $host_1 l2tp add tunnel tunnel_id 1041 peer_tunnel_id 1042 \
143 encap ip local 10.1.1.1 remote 10.1.2.1
144 ip -netns $host_1 l2tp add session name l2tp4 tunnel_id 1041 \
145 session_id 1041 peer_session_id 1042
146 ip -netns $host_1 link set dev l2tp4 up
147 ip -netns $host_1 addr add dev l2tp4 172.16.1.1 peer 172.16.1.2
148
149 #
150 # configure l2tpv3 tunnel on host-2
151 #
152 ip -netns $host_2 l2tp add tunnel tunnel_id 1042 peer_tunnel_id 1041 \
153 encap ip local 10.1.2.1 remote 10.1.1.1
154 ip -netns $host_2 l2tp add session name l2tp4 tunnel_id 1042 \
155 session_id 1042 peer_session_id 1041
156 ip -netns $host_2 link set dev l2tp4 up
157 ip -netns $host_2 addr add dev l2tp4 172.16.1.2 peer 172.16.1.1
158
159 #
160 # add routes to loopback addresses
161 #
162 ip -netns $host_1 ro add 172.16.101.2/32 via 172.16.1.2
163 ip -netns $host_2 ro add 172.16.101.1/32 via 172.16.1.1
164 }
165
166 setup_l2tp_ipv6()
167 {
168 #
169 # configure l2tpv3 tunnel on host-1
170 #
171 ip -netns $host_1 l2tp add tunnel tunnel_id 1061 peer_tunnel_id 1062 \
172 encap ip local 2001:db8:1::1 remote 2001:db8:2::1
173 ip -netns $host_1 l2tp add session name l2tp6 tunnel_id 1061 \
174 session_id 1061 peer_session_id 1062
175 ip -netns $host_1 link set dev l2tp6 up
176 ip -netns $host_1 addr add dev l2tp6 fc00:1::1 peer fc00:1::2
177
178 #
179 # configure l2tpv3 tunnel on host-2
180 #
181 ip -netns $host_2 l2tp add tunnel tunnel_id 1062 peer_tunnel_id 1061 \
182 encap ip local 2001:db8:2::1 remote 2001:db8:1::1
183 ip -netns $host_2 l2tp add session name l2tp6 tunnel_id 1062 \
184 session_id 1062 peer_session_id 1061
185 ip -netns $host_2 link set dev l2tp6 up
186 ip -netns $host_2 addr add dev l2tp6 fc00:1::2 peer fc00:1::1
187
188 #
189 # add routes to loopback addresses
190 #
191 ip -netns $host_1 -6 ro add fc00:101::2/128 via fc00:1::2
192 ip -netns $host_2 -6 ro add fc00:101::1/128 via fc00:1::1
193 }
194
195 setup()
196 {
197 # start clean
198 cleanup
199
200 set -e
201 setup_ns host_1 host_2 router
202 create_ns $host_1 172.16.101.1/32 fc00:101::1/128
203 create_ns $host_2 172.16.101.2/32 fc00:101::2/128
204 create_ns $router
205
206 connect_ns $host_1 eth0 10.1.1.1/24 2001:db8:1::1/64 \
207 $router eth1 10.1.1.2/24 2001:db8:1::2/64
208
209 connect_ns $host_2 eth0 10.1.2.1/24 2001:db8:2::1/64 \
210 $router eth2 10.1.2.2/24 2001:db8:2::2/64
211
212 ip -netns $host_1 ro add 10.1.2.0/24 via 10.1.1.2
213 ip -netns $host_1 -6 ro add 2001:db8:2::/64 via 2001:db8:1::2
214
215 ip -netns $host_2 ro add 10.1.1.0/24 via 10.1.2.2
216 ip -netns $host_2 -6 ro add 2001:db8:1::/64 via 2001:db8:2::2
217
218 setup_l2tp_ipv4
219 setup_l2tp_ipv6
220 set +e
221 }
222
223 setup_ipsec()
224 {
225 #
226 # IPv4
227 #
228 run_cmd $host_1 ip xfrm policy add \
229 src 10.1.1.1 dst 10.1.2.1 dir out \
230 tmpl proto esp mode transport
231
232 run_cmd $host_1 ip xfrm policy add \
233 src 10.1.2.1 dst 10.1.1.1 dir in \
234 tmpl proto esp mode transport
235
236 run_cmd $host_2 ip xfrm policy add \
237 src 10.1.1.1 dst 10.1.2.1 dir in \
238 tmpl proto esp mode transport
239
240 run_cmd $host_2 ip xfrm policy add \
241 src 10.1.2.1 dst 10.1.1.1 dir out \
242 tmpl proto esp mode transport
243
244 ip -netns $host_1 xfrm state add \
245 src 10.1.1.1 dst 10.1.2.1 \
246 spi 0x1000 proto esp aead 'rfc4106(gcm(aes))' \
247 0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport
248
249 ip -netns $host_1 xfrm state add \
250 src 10.1.2.1 dst 10.1.1.1 \
251 spi 0x1001 proto esp aead 'rfc4106(gcm(aes))' \
252 0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport
253
254 ip -netns $host_2 xfrm state add \
255 src 10.1.1.1 dst 10.1.2.1 \
256 spi 0x1000 proto esp aead 'rfc4106(gcm(aes))' \
257 0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport
258
259 ip -netns $host_2 xfrm state add \
260 src 10.1.2.1 dst 10.1.1.1 \
261 spi 0x1001 proto esp aead 'rfc4106(gcm(aes))' \
262 0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport
263
264 #
265 # IPV6
266 #
267 run_cmd $host_1 ip -6 xfrm policy add \
268 src 2001:db8:1::1 dst 2001:db8:2::1 dir out \
269 tmpl proto esp mode transport
270
271 run_cmd $host_1 ip -6 xfrm policy add \
272 src 2001:db8:2::1 dst 2001:db8:1::1 dir in \
273 tmpl proto esp mode transport
274
275 run_cmd $host_2 ip -6 xfrm policy add \
276 src 2001:db8:1::1 dst 2001:db8:2::1 dir in \
277 tmpl proto esp mode transport
278
279 run_cmd $host_2 ip -6 xfrm policy add \
280 src 2001:db8:2::1 dst 2001:db8:1::1 dir out \
281 tmpl proto esp mode transport
282
283 ip -netns $host_1 -6 xfrm state add \
284 src 2001:db8:1::1 dst 2001:db8:2::1 \
285 spi 0x1000 proto esp aead 'rfc4106(gcm(aes))' \
286 0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport
287
288 ip -netns $host_1 -6 xfrm state add \
289 src 2001:db8:2::1 dst 2001:db8:1::1 \
290 spi 0x1001 proto esp aead 'rfc4106(gcm(aes))' \
291 0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport
292
293 ip -netns $host_2 -6 xfrm state add \
294 src 2001:db8:1::1 dst 2001:db8:2::1 \
295 spi 0x1000 proto esp aead 'rfc4106(gcm(aes))' \
296 0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport
297
298 ip -netns $host_2 -6 xfrm state add \
299 src 2001:db8:2::1 dst 2001:db8:1::1 \
300 spi 0x1001 proto esp aead 'rfc4106(gcm(aes))' \
301 0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f 128 mode transport
302 }
303
304 teardown_ipsec()
305 {
306 run_cmd $host_1 ip xfrm state flush
307 run_cmd $host_1 ip xfrm policy flush
308 run_cmd $host_2 ip xfrm state flush
309 run_cmd $host_2 ip xfrm policy flush
310 }
311
312 ################################################################################
313 # generate traffic through tunnel for various cases
314
315 run_ping()
316 {
317 local desc="$1"
318
319 run_cmd $host_1 ping -c1 -w1 172.16.1.2
320 log_test $? 0 "IPv4 basic L2TP tunnel ${desc}"
321
322 run_cmd $host_1 ping -c1 -w1 -I 172.16.101.1 172.16.101.2
323 log_test $? 0 "IPv4 route through L2TP tunnel ${desc}"
324
325 run_cmd $host_1 ${ping6} -c1 -w1 fc00:1::2
326 log_test $? 0 "IPv6 basic L2TP tunnel ${desc}"
327
328 run_cmd $host_1 ${ping6} -c1 -w1 -I fc00:101::1 fc00:101::2
329 log_test $? 0 "IPv6 route through L2TP tunnel ${desc}"
330 }
331
332 run_tests()
333 {
334 local desc
335
336 setup
337 run_ping
338
339 setup_ipsec
340 run_ping "- with IPsec"
341 run_cmd $host_1 ping -c1 -w1 172.16.1.2
342 log_test $? 0 "IPv4 basic L2TP tunnel ${desc}"
343
344 run_cmd $host_1 ping -c1 -w1 -I 172.16.101.1 172.16.101.2
345 log_test $? 0 "IPv4 route through L2TP tunnel ${desc}"
346
347 run_cmd $host_1 ${ping6} -c1 -w1 fc00:1::2
348 log_test $? 0 "IPv6 basic L2TP tunnel - with IPsec"
349
350 run_cmd $host_1 ${ping6} -c1 -w1 -I fc00:101::1 fc00:101::2
351 log_test $? 0 "IPv6 route through L2TP tunnel - with IPsec"
352
353 teardown_ipsec
354 run_ping "- after IPsec teardown"
355 }
356
357 ################################################################################
358 # main
359
360 declare -i nfail=0
361 declare -i nsuccess=0
362
363 while getopts :pv o
364 do
365 case $o in
366 p) PAUSE_ON_FAIL=yes;;
367 v) VERBOSE=$(($VERBOSE + 1));;
368 *) exit 1;;
369 esac
370 done
371
372 run_tests
373 cleanup
374
375 printf "\nTests passed: %3d\n" ${nsuccess}
376 printf "Tests failed: %3d\n" ${nfail}
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