1 #!/bin/bash
2 # SPDX-License-Identifier: GPL-2.0
3 #
4 # Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
5 #
6 # This script tests the below topology:
7 #
8 # ┌─────────────────────┐ ┌──────────────────────────────────┐ ┌─────────────────────┐
9 # │ $ns1 namespace │ │ $ns0 namespace │ │ $ns2 namespace │
10 # │ │ │ │ │ │
11 # │┌────────┐ │ │ ┌────────┐ │ │ ┌────────┐│
12 # ││ wg0 │───────────┼───┼────────────│ lo │────────────┼───┼───────────│ wg0 ││
13 # │├────────┴──────────┐│ │ ┌───────┴────────┴────────┐ │ │┌──────────┴────────┤│
14 # ││192.168.241.1/24 ││ │ │(ns1) (ns2) │ │ ││192.168.241.2/24 ││
15 # ││fd00::1/24 ││ │ │127.0.0.1:1 127.0.0.1:2│ │ ││fd00::2/24 ││
16 # │└───────────────────┘│ │ │[::]:1 [::]:2 │ │ │└───────────────────┘│
17 # └─────────────────────┘ │ └─────────────────────────┘ │ └─────────────────────┘
18 # └──────────────────────────────────┘
19 #
20 # After the topology is prepared we run a series of TCP/UDP iperf3 tests between the
21 # wireguard peers in $ns1 and $ns2. Note that $ns0 is the endpoint for the wg0
22 # interfaces in $ns1 and $ns2. See https://www.wireguard.com/netns/ for further
23 # details on how this is accomplished.
24 set -e
25 shopt -s extglob
26
27 exec 3>&1
28 export LANG=C
29 export WG_HIDE_KEYS=never
30 NPROC=( /sys/devices/system/cpu/cpu+([0-9]) ); NPROC=${#NPROC[@]}
31 netns0="wg-test-$$-0"
32 netns1="wg-test-$$-1"
33 netns2="wg-test-$$-2"
34 pretty() { echo -e "\x1b[32m\x1b[1m[+] ${1:+NS$1: }${2}\x1b[0m" >&3; }
35 pp() { pretty "" "$*"; "$@"; }
36 maybe_exec() { if [[ $BASHPID -eq $$ ]]; then "$@"; else exec "$@"; fi; }
37 n0() { pretty 0 "$*"; maybe_exec ip netns exec $netns0 "$@"; }
38 n1() { pretty 1 "$*"; maybe_exec ip netns exec $netns1 "$@"; }
39 n2() { pretty 2 "$*"; maybe_exec ip netns exec $netns2 "$@"; }
40 ip0() { pretty 0 "ip $*"; ip -n $netns0 "$@"; }
41 ip1() { pretty 1 "ip $*"; ip -n $netns1 "$@"; }
42 ip2() { pretty 2 "ip $*"; ip -n $netns2 "$@"; }
43 sleep() { read -t "$1" -N 1 || true; }
44 waitiperf() { pretty "${1//*-}" "wait for iperf:${3:-5201} pid $2"; while [[ $(ss -N "$1" -tlpH "sport = ${3:-5201}") != *\"iperf3\",pid=$2,fd=* ]]; do sleep 0.1; done; }
45 waitncatudp() { pretty "${1//*-}" "wait for udp:1111 pid $2"; while [[ $(ss -N "$1" -ulpH 'sport = 1111') != *\"ncat\",pid=$2,fd=* ]]; do sleep 0.1; done; }
46 waitiface() { pretty "${1//*-}" "wait for $2 to come up"; ip netns exec "$1" bash -c "while [[ \$(< \"/sys/class/net/$2/operstate\") != up ]]; do read -t .1 -N 0 || true; done;"; }
47
48 cleanup() {
49 set +e
50 exec 2>/dev/null
51 printf "$orig_message_cost" > /proc/sys/net/core/message_cost
52 ip0 link del dev wg0
53 ip0 link del dev wg1
54 ip1 link del dev wg0
55 ip1 link del dev wg1
56 ip2 link del dev wg0
57 ip2 link del dev wg1
58 local to_kill="$(ip netns pids $netns0) $(ip netns pids $netns1) $(ip netns pids $netns2)"
59 [[ -n $to_kill ]] && kill $to_kill
60 pp ip netns del $netns1
61 pp ip netns del $netns2
62 pp ip netns del $netns0
63 exit
64 }
65
66 orig_message_cost="$(< /proc/sys/net/core/message_cost)"
67 trap cleanup EXIT
68 printf 0 > /proc/sys/net/core/message_cost
69
70 ip netns del $netns0 2>/dev/null || true
71 ip netns del $netns1 2>/dev/null || true
72 ip netns del $netns2 2>/dev/null || true
73 pp ip netns add $netns0
74 pp ip netns add $netns1
75 pp ip netns add $netns2
76 ip0 link set up dev lo
77
78 ip0 link add dev wg0 type wireguard
79 ip0 link set wg0 netns $netns1
80 ip0 link add dev wg0 type wireguard
81 ip0 link set wg0 netns $netns2
82 key1="$(pp wg genkey)"
83 key2="$(pp wg genkey)"
84 key3="$(pp wg genkey)"
85 key4="$(pp wg genkey)"
86 pub1="$(pp wg pubkey <<<"$key1")"
87 pub2="$(pp wg pubkey <<<"$key2")"
88 pub3="$(pp wg pubkey <<<"$key3")"
89 pub4="$(pp wg pubkey <<<"$key4")"
90 psk="$(pp wg genpsk)"
91 [[ -n $key1 && -n $key2 && -n $psk ]]
92
93 configure_peers() {
94 ip1 addr add 192.168.241.1/24 dev wg0
95 ip1 addr add fd00::1/112 dev wg0
96
97 ip2 addr add 192.168.241.2/24 dev wg0
98 ip2 addr add fd00::2/112 dev wg0
99
100 n1 wg set wg0 \
101 private-key <(echo "$key1") \
102 listen-port 1 \
103 peer "$pub2" \
104 preshared-key <(echo "$psk") \
105 allowed-ips 192.168.241.2/32,fd00::2/128
106 n2 wg set wg0 \
107 private-key <(echo "$key2") \
108 listen-port 2 \
109 peer "$pub1" \
110 preshared-key <(echo "$psk") \
111 allowed-ips 192.168.241.1/32,fd00::1/128
112
113 ip1 link set up dev wg0
114 ip2 link set up dev wg0
115 }
116 configure_peers
117
118 tests() {
119 # Ping over IPv4
120 n2 ping -c 10 -f -W 1 192.168.241.1
121 n1 ping -c 10 -f -W 1 192.168.241.2
122
123 # Ping over IPv6
124 n2 ping6 -c 10 -f -W 1 fd00::1
125 n1 ping6 -c 10 -f -W 1 fd00::2
126
127 # TCP over IPv4
128 n2 iperf3 -s -1 -B 192.168.241.2 &
129 waitiperf $netns2 $!
130 n1 iperf3 -Z -t 3 -c 192.168.241.2
131
132 # TCP over IPv6
133 n1 iperf3 -s -1 -B fd00::1 &
134 waitiperf $netns1 $!
135 n2 iperf3 -Z -t 3 -c fd00::1
136
137 # UDP over IPv4
138 n1 iperf3 -s -1 -B 192.168.241.1 &
139 waitiperf $netns1 $!
140 n2 iperf3 -Z -t 3 -b 0 -u -c 192.168.241.1
141
142 # UDP over IPv6
143 n2 iperf3 -s -1 -B fd00::2 &
144 waitiperf $netns2 $!
145 n1 iperf3 -Z -t 3 -b 0 -u -c fd00::2
146
147 # TCP over IPv4, in parallel
148 local pids=( ) i
149 for ((i=0; i < NPROC; ++i)) do
150 n2 iperf3 -p $(( 5200 + i )) -s -1 -B 192.168.241.2 &
151 pids+=( $! ); waitiperf $netns2 $! $(( 5200 + i ))
152 done
153 for ((i=0; i < NPROC; ++i)) do
154 n1 iperf3 -Z -t 3 -p $(( 5200 + i )) -c 192.168.241.2 &
155 done
156 wait "${pids[@]}"
157 }
158
159 [[ $(ip1 link show dev wg0) =~ mtu\ ([0-9]+) ]] && orig_mtu="${BASH_REMATCH[1]}"
160 big_mtu=$(( 34816 - 1500 + $orig_mtu ))
161
162 # Test using IPv4 as outer transport
163 n1 wg set wg0 peer "$pub2" endpoint 127.0.0.1:2
164 n2 wg set wg0 peer "$pub1" endpoint 127.0.0.1:1
165 # Before calling tests, we first make sure that the stats counters and timestamper are working
166 n2 ping -c 10 -f -W 1 192.168.241.1
167 { read _; read _; read _; read rx_bytes _; read _; read tx_bytes _; } < <(ip2 -stats link show dev wg0)
168 (( rx_bytes == 1372 && (tx_bytes == 1428 || tx_bytes == 1460) ))
169 { read _; read _; read _; read rx_bytes _; read _; read tx_bytes _; } < <(ip1 -stats link show dev wg0)
170 (( tx_bytes == 1372 && (rx_bytes == 1428 || rx_bytes == 1460) ))
171 read _ rx_bytes tx_bytes < <(n2 wg show wg0 transfer)
172 (( rx_bytes == 1372 && (tx_bytes == 1428 || tx_bytes == 1460) ))
173 read _ rx_bytes tx_bytes < <(n1 wg show wg0 transfer)
174 (( tx_bytes == 1372 && (rx_bytes == 1428 || rx_bytes == 1460) ))
175 read _ timestamp < <(n1 wg show wg0 latest-handshakes)
176 (( timestamp != 0 ))
177
178 tests
179 ip1 link set wg0 mtu $big_mtu
180 ip2 link set wg0 mtu $big_mtu
181 tests
182
183 ip1 link set wg0 mtu $orig_mtu
184 ip2 link set wg0 mtu $orig_mtu
185
186 # Test using IPv6 as outer transport
187 n1 wg set wg0 peer "$pub2" endpoint [::1]:2
188 n2 wg set wg0 peer "$pub1" endpoint [::1]:1
189 tests
190 ip1 link set wg0 mtu $big_mtu
191 ip2 link set wg0 mtu $big_mtu
192 tests
193
194 # Test that route MTUs work with the padding
195 ip1 link set wg0 mtu 1300
196 ip2 link set wg0 mtu 1300
197 n1 wg set wg0 peer "$pub2" endpoint 127.0.0.1:2
198 n2 wg set wg0 peer "$pub1" endpoint 127.0.0.1:1
199 n0 iptables -A INPUT -m length --length 1360 -j DROP
200 n1 ip route add 192.168.241.2/32 dev wg0 mtu 1299
201 n2 ip route add 192.168.241.1/32 dev wg0 mtu 1299
202 n2 ping -c 1 -W 1 -s 1269 192.168.241.1
203 n2 ip route delete 192.168.241.1/32 dev wg0 mtu 1299
204 n1 ip route delete 192.168.241.2/32 dev wg0 mtu 1299
205 n0 iptables -F INPUT
206
207 ip1 link set wg0 mtu $orig_mtu
208 ip2 link set wg0 mtu $orig_mtu
209
210 # Test using IPv4 that roaming works
211 ip0 -4 addr del 127.0.0.1/8 dev lo
212 ip0 -4 addr add 127.212.121.99/8 dev lo
213 n1 wg set wg0 listen-port 9999
214 n1 wg set wg0 peer "$pub2" endpoint 127.0.0.1:2
215 n1 ping6 -W 1 -c 1 fd00::2
216 [[ $(n2 wg show wg0 endpoints) == "$pub1 127.212.121.99:9999" ]]
217
218 # Test using IPv6 that roaming works
219 n1 wg set wg0 listen-port 9998
220 n1 wg set wg0 peer "$pub2" endpoint [::1]:2
221 n1 ping -W 1 -c 1 192.168.241.2
222 [[ $(n2 wg show wg0 endpoints) == "$pub1 [::1]:9998" ]]
223
224 # Test that crypto-RP filter works
225 n1 wg set wg0 peer "$pub2" allowed-ips 192.168.241.0/24
226 exec 4< <(n1 ncat -l -u -p 1111)
227 ncat_pid=$!
228 waitncatudp $netns1 $ncat_pid
229 n2 ncat -u 192.168.241.1 1111 <<<"X"
230 read -r -N 1 -t 1 out <&4 && [[ $out == "X" ]]
231 kill $ncat_pid
232 more_specific_key="$(pp wg genkey | pp wg pubkey)"
233 n1 wg set wg0 peer "$more_specific_key" allowed-ips 192.168.241.2/32
234 n2 wg set wg0 listen-port 9997
235 exec 4< <(n1 ncat -l -u -p 1111)
236 ncat_pid=$!
237 waitncatudp $netns1 $ncat_pid
238 n2 ncat -u 192.168.241.1 1111 <<<"X"
239 ! read -r -N 1 -t 1 out <&4 || false
240 kill $ncat_pid
241 n1 wg set wg0 peer "$more_specific_key" remove
242 [[ $(n1 wg show wg0 endpoints) == "$pub2 [::1]:9997" ]]
243
244 # Test that we can change private keys keys and immediately handshake
245 n1 wg set wg0 private-key <(echo "$key1") peer "$pub2" preshared-key <(echo "$psk") allowed-ips 192.168.241.2/32 endpoint 127.0.0.1:2
246 n2 wg set wg0 private-key <(echo "$key2") listen-port 2 peer "$pub1" preshared-key <(echo "$psk") allowed-ips 192.168.241.1/32
247 n1 ping -W 1 -c 1 192.168.241.2
248 n1 wg set wg0 private-key <(echo "$key3")
249 n2 wg set wg0 peer "$pub3" preshared-key <(echo "$psk") allowed-ips 192.168.241.1/32 peer "$pub1" remove
250 n1 ping -W 1 -c 1 192.168.241.2
251 n2 wg set wg0 peer "$pub3" remove
252
253 # Test that we can route wg through wg
254 ip1 addr flush dev wg0
255 ip2 addr flush dev wg0
256 ip1 addr add fd00::5:1/112 dev wg0
257 ip2 addr add fd00::5:2/112 dev wg0
258 n1 wg set wg0 private-key <(echo "$key1") peer "$pub2" preshared-key <(echo "$psk") allowed-ips fd00::5:2/128 endpoint 127.0.0.1:2
259 n2 wg set wg0 private-key <(echo "$key2") listen-port 2 peer "$pub1" preshared-key <(echo "$psk") allowed-ips fd00::5:1/128 endpoint 127.212.121.99:9998
260 ip1 link add wg1 type wireguard
261 ip2 link add wg1 type wireguard
262 ip1 addr add 192.168.241.1/24 dev wg1
263 ip1 addr add fd00::1/112 dev wg1
264 ip2 addr add 192.168.241.2/24 dev wg1
265 ip2 addr add fd00::2/112 dev wg1
266 ip1 link set mtu 1340 up dev wg1
267 ip2 link set mtu 1340 up dev wg1
268 n1 wg set wg1 listen-port 5 private-key <(echo "$key3") peer "$pub4" allowed-ips 192.168.241.2/32,fd00::2/128 endpoint [fd00::5:2]:5
269 n2 wg set wg1 listen-port 5 private-key <(echo "$key4") peer "$pub3" allowed-ips 192.168.241.1/32,fd00::1/128 endpoint [fd00::5:1]:5
270 tests
271 # Try to set up a routing loop between the two namespaces
272 ip1 link set netns $netns0 dev wg1
273 ip0 addr add 192.168.241.1/24 dev wg1
274 ip0 link set up dev wg1
275 n0 ping -W 1 -c 1 192.168.241.2
276 n1 wg set wg0 peer "$pub2" endpoint 192.168.241.2:7
277 ip2 link del wg0
278 ip2 link del wg1
279 read _ _ tx_bytes_before < <(n0 wg show wg1 transfer)
280 ! n0 ping -W 1 -c 10 -f 192.168.241.2 || false
281 sleep 1
282 read _ _ tx_bytes_after < <(n0 wg show wg1 transfer)
283 if ! (( tx_bytes_after - tx_bytes_before < 70000 )); then
284 errstart=$'\x1b[37m\x1b[41m\x1b[1m'
285 errend=$'\x1b[0m'
286 echo "${errstart} ${errend}"
287 echo "${errstart} E R R O R ${errend}"
288 echo "${errstart} ${errend}"
289 echo "${errstart} This architecture does not do the right thing ${errend}"
290 echo "${errstart} with cross-namespace routing loops. This test ${errend}"
291 echo "${errstart} has thus technically failed but, as this issue ${errend}"
292 echo "${errstart} is as yet unsolved, these tests will continue ${errend}"
293 echo "${errstart} onward. :( ${errend}"
294 echo "${errstart} ${errend}"
295 fi
296
297 ip0 link del wg1
298 ip1 link del wg0
299
300 # Test using NAT. We now change the topology to this:
301 # ┌────────────────────────────────────────┐ ┌────────────────────────────────────────────────┐ ┌────────────────────────────────────────┐
302 # │ $ns1 namespace │ │ $ns0 namespace │ │ $ns2 namespace │
303 # │ │ │ │ │ │
304 # │ ┌─────┐ ┌─────┐ │ │ ┌──────┐ ┌──────┐ │ │ ┌─────┐ ┌─────┐ │
305 # │ │ wg0 │─────────────│vethc│───────────┼────┼────│vethrc│ │vethrs│──────────────┼─────┼──│veths│────────────│ wg0 │ │
306 # │ ├─────┴──────────┐ ├─────┴──────────┐│ │ ├──────┴─────────┐ ├──────┴────────────┐ │ │ ├─────┴──────────┐ ├─────┴──────────┐ │
307 # │ │192.168.241.1/24│ │192.168.1.100/24││ │ │192.168.1.1/24 │ │10.0.0.1/24 │ │ │ │10.0.0.100/24 │ │192.168.241.2/24│ │
308 # │ │fd00::1/24 │ │ ││ │ │ │ │SNAT:192.168.1.0/24│ │ │ │ │ │fd00::2/24 │ │
309 # │ └────────────────┘ └────────────────┘│ │ └────────────────┘ └───────────────────┘ │ │ └────────────────┘ └────────────────┘ │
310 # └────────────────────────────────────────┘ └────────────────────────────────────────────────┘ └────────────────────────────────────────┘
311
312 ip1 link add dev wg0 type wireguard
313 ip2 link add dev wg0 type wireguard
314 configure_peers
315
316 ip0 link add vethrc type veth peer name vethc
317 ip0 link add vethrs type veth peer name veths
318 ip0 link set vethc netns $netns1
319 ip0 link set veths netns $netns2
320 ip0 link set vethrc up
321 ip0 link set vethrs up
322 ip0 addr add 192.168.1.1/24 dev vethrc
323 ip0 addr add 10.0.0.1/24 dev vethrs
324 ip1 addr add 192.168.1.100/24 dev vethc
325 ip1 link set vethc up
326 ip1 route add default via 192.168.1.1
327 ip2 addr add 10.0.0.100/24 dev veths
328 ip2 link set veths up
329 waitiface $netns0 vethrc
330 waitiface $netns0 vethrs
331 waitiface $netns1 vethc
332 waitiface $netns2 veths
333
334 n0 bash -c 'printf 1 > /proc/sys/net/ipv4/ip_forward'
335 n0 bash -c 'printf 2 > /proc/sys/net/netfilter/nf_conntrack_udp_timeout'
336 n0 bash -c 'printf 2 > /proc/sys/net/netfilter/nf_conntrack_udp_timeout_stream'
337 n0 iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -d 10.0.0.0/24 -j SNAT --to 10.0.0.1
338
339 n1 wg set wg0 peer "$pub2" endpoint 10.0.0.100:2 persistent-keepalive 1
340 n1 ping -W 1 -c 1 192.168.241.2
341 n2 ping -W 1 -c 1 192.168.241.1
342 [[ $(n2 wg show wg0 endpoints) == "$pub1 10.0.0.1:1" ]]
343 # Demonstrate n2 can still send packets to n1, since persistent-keepalive will prevent connection tracking entry from expiring (to see entries: `n0 conntrack -L`).
344 pp sleep 3
345 n2 ping -W 1 -c 1 192.168.241.1
346 n1 wg set wg0 peer "$pub2" persistent-keepalive 0
347
348 # Test that sk_bound_dev_if works
349 n1 ping -I wg0 -c 1 -W 1 192.168.241.2
350 # What about when the mark changes and the packet must be rerouted?
351 n1 iptables -t mangle -I OUTPUT -j MARK --set-xmark 1
352 n1 ping -c 1 -W 1 192.168.241.2 # First the boring case
353 n1 ping -I wg0 -c 1 -W 1 192.168.241.2 # Then the sk_bound_dev_if case
354 n1 iptables -t mangle -D OUTPUT -j MARK --set-xmark 1
355
356 # Test that onion routing works, even when it loops
357 n1 wg set wg0 peer "$pub3" allowed-ips 192.168.242.2/32 endpoint 192.168.241.2:5
358 ip1 addr add 192.168.242.1/24 dev wg0
359 ip2 link add wg1 type wireguard
360 ip2 addr add 192.168.242.2/24 dev wg1
361 n2 wg set wg1 private-key <(echo "$key3") listen-port 5 peer "$pub1" allowed-ips 192.168.242.1/32
362 ip2 link set wg1 up
363 n1 ping -W 1 -c 1 192.168.242.2
364 ip2 link del wg1
365 n1 wg set wg0 peer "$pub3" endpoint 192.168.242.2:5
366 ! n1 ping -W 1 -c 1 192.168.242.2 || false # Should not crash kernel
367 n1 wg set wg0 peer "$pub3" remove
368 ip1 addr del 192.168.242.1/24 dev wg0
369
370 # Do a wg-quick(8)-style policy routing for the default route, making sure vethc has a v6 address to tease out bugs.
371 ip1 -6 addr add fc00::9/96 dev vethc
372 ip1 -6 route add default via fc00::1
373 ip2 -4 addr add 192.168.99.7/32 dev wg0
374 ip2 -6 addr add abab::1111/128 dev wg0
375 n1 wg set wg0 fwmark 51820 peer "$pub2" allowed-ips 192.168.99.7,abab::1111
376 ip1 -6 route add default dev wg0 table 51820
377 ip1 -6 rule add not fwmark 51820 table 51820
378 ip1 -6 rule add table main suppress_prefixlength 0
379 ip1 -4 route add default dev wg0 table 51820
380 ip1 -4 rule add not fwmark 51820 table 51820
381 ip1 -4 rule add table main suppress_prefixlength 0
382 n1 bash -c 'printf 0 > /proc/sys/net/ipv4/conf/vethc/rp_filter'
383 # Flood the pings instead of sending just one, to trigger routing table reference counting bugs.
384 n1 ping -W 1 -c 100 -f 192.168.99.7
385 n1 ping -W 1 -c 100 -f abab::1111
386
387 # Have ns2 NAT into wg0 packets from ns0, but return an icmp error along the right route.
388 n2 iptables -t nat -A POSTROUTING -s 10.0.0.0/24 -d 192.168.241.0/24 -j SNAT --to 192.168.241.2
389 n0 iptables -t filter -A INPUT \! -s 10.0.0.0/24 -i vethrs -j DROP # Manual rpfilter just to be explicit.
390 n2 bash -c 'printf 1 > /proc/sys/net/ipv4/ip_forward'
391 ip0 -4 route add 192.168.241.1 via 10.0.0.100
392 n2 wg set wg0 peer "$pub1" remove
393 [[ $(! n0 ping -W 1 -c 1 192.168.241.1 || false) == *"From 10.0.0.100 icmp_seq=1 Destination Host Unreachable"* ]]
394
395 n0 iptables -t nat -F
396 n0 iptables -t filter -F
397 n2 iptables -t nat -F
398 ip0 link del vethrc
399 ip0 link del vethrs
400 ip1 link del wg0
401 ip2 link del wg0
402
403 # Test that saddr routing is sticky but not too sticky, changing to this topology:
404 # ┌────────────────────────────────────────┐ ┌────────────────────────────────────────┐
405 # │ $ns1 namespace │ │ $ns2 namespace │
406 # │ │ │ │
407 # │ ┌─────┐ ┌─────┐ │ │ ┌─────┐ ┌─────┐ │
408 # │ │ wg0 │─────────────│veth1│───────────┼────┼──│veth2│────────────│ wg0 │ │
409 # │ ├─────┴──────────┐ ├─────┴──────────┐│ │ ├─────┴──────────┐ ├─────┴──────────┐ │
410 # │ │192.168.241.1/24│ │10.0.0.1/24 ││ │ │10.0.0.2/24 │ │192.168.241.2/24│ │
411 # │ │fd00::1/24 │ │fd00:aa::1/96 ││ │ │fd00:aa::2/96 │ │fd00::2/24 │ │
412 # │ └────────────────┘ └────────────────┘│ │ └────────────────┘ └────────────────┘ │
413 # └────────────────────────────────────────┘ └────────────────────────────────────────┘
414
415 ip1 link add dev wg0 type wireguard
416 ip2 link add dev wg0 type wireguard
417 configure_peers
418 ip1 link add veth1 type veth peer name veth2
419 ip1 link set veth2 netns $netns2
420 n1 bash -c 'printf 0 > /proc/sys/net/ipv6/conf/all/accept_dad'
421 n2 bash -c 'printf 0 > /proc/sys/net/ipv6/conf/all/accept_dad'
422 n1 bash -c 'printf 0 > /proc/sys/net/ipv6/conf/veth1/accept_dad'
423 n2 bash -c 'printf 0 > /proc/sys/net/ipv6/conf/veth2/accept_dad'
424 n1 bash -c 'printf 1 > /proc/sys/net/ipv4/conf/veth1/promote_secondaries'
425
426 # First we check that we aren't overly sticky and can fall over to new IPs when old ones are removed
427 ip1 addr add 10.0.0.1/24 dev veth1
428 ip1 addr add fd00:aa::1/96 dev veth1
429 ip2 addr add 10.0.0.2/24 dev veth2
430 ip2 addr add fd00:aa::2/96 dev veth2
431 ip1 link set veth1 up
432 ip2 link set veth2 up
433 waitiface $netns1 veth1
434 waitiface $netns2 veth2
435 n1 wg set wg0 peer "$pub2" endpoint 10.0.0.2:2
436 n1 ping -W 1 -c 1 192.168.241.2
437 ip1 addr add 10.0.0.10/24 dev veth1
438 ip1 addr del 10.0.0.1/24 dev veth1
439 n1 ping -W 1 -c 1 192.168.241.2
440 n1 wg set wg0 peer "$pub2" endpoint [fd00:aa::2]:2
441 n1 ping -W 1 -c 1 192.168.241.2
442 ip1 addr add fd00:aa::10/96 dev veth1
443 ip1 addr del fd00:aa::1/96 dev veth1
444 n1 ping -W 1 -c 1 192.168.241.2
445
446 # Now we show that we can successfully do reply to sender routing
447 ip1 link set veth1 down
448 ip2 link set veth2 down
449 ip1 addr flush dev veth1
450 ip2 addr flush dev veth2
451 ip1 addr add 10.0.0.1/24 dev veth1
452 ip1 addr add 10.0.0.2/24 dev veth1
453 ip1 addr add fd00:aa::1/96 dev veth1
454 ip1 addr add fd00:aa::2/96 dev veth1
455 ip2 addr add 10.0.0.3/24 dev veth2
456 ip2 addr add fd00:aa::3/96 dev veth2
457 ip1 link set veth1 up
458 ip2 link set veth2 up
459 waitiface $netns1 veth1
460 waitiface $netns2 veth2
461 n2 wg set wg0 peer "$pub1" endpoint 10.0.0.1:1
462 n2 ping -W 1 -c 1 192.168.241.1
463 [[ $(n2 wg show wg0 endpoints) == "$pub1 10.0.0.1:1" ]]
464 n2 wg set wg0 peer "$pub1" endpoint [fd00:aa::1]:1
465 n2 ping -W 1 -c 1 192.168.241.1
466 [[ $(n2 wg show wg0 endpoints) == "$pub1 [fd00:aa::1]:1" ]]
467 n2 wg set wg0 peer "$pub1" endpoint 10.0.0.2:1
468 n2 ping -W 1 -c 1 192.168.241.1
469 [[ $(n2 wg show wg0 endpoints) == "$pub1 10.0.0.2:1" ]]
470 n2 wg set wg0 peer "$pub1" endpoint [fd00:aa::2]:1
471 n2 ping -W 1 -c 1 192.168.241.1
472 [[ $(n2 wg show wg0 endpoints) == "$pub1 [fd00:aa::2]:1" ]]
473
474 # What happens if the inbound destination address belongs to a different interface as the default route?
475 ip1 link add dummy0 type dummy
476 ip1 addr add 10.50.0.1/24 dev dummy0
477 ip1 link set dummy0 up
478 ip2 route add 10.50.0.0/24 dev veth2
479 n2 wg set wg0 peer "$pub1" endpoint 10.50.0.1:1
480 n2 ping -W 1 -c 1 192.168.241.1
481 [[ $(n2 wg show wg0 endpoints) == "$pub1 10.50.0.1:1" ]]
482
483 ip1 link del dummy0
484 ip1 addr flush dev veth1
485 ip2 addr flush dev veth2
486 ip1 route flush dev veth1
487 ip2 route flush dev veth2
488
489 # Now we see what happens if another interface route takes precedence over an ongoing one
490 ip1 link add veth3 type veth peer name veth4
491 ip1 link set veth4 netns $netns2
492 ip1 addr add 10.0.0.1/24 dev veth1
493 ip2 addr add 10.0.0.2/24 dev veth2
494 ip1 addr add 10.0.0.3/24 dev veth3
495 ip1 link set veth1 up
496 ip2 link set veth2 up
497 ip1 link set veth3 up
498 ip2 link set veth4 up
499 waitiface $netns1 veth1
500 waitiface $netns2 veth2
501 waitiface $netns1 veth3
502 waitiface $netns2 veth4
503 ip1 route flush dev veth1
504 ip1 route flush dev veth3
505 ip1 route add 10.0.0.0/24 dev veth1 src 10.0.0.1 metric 2
506 n1 wg set wg0 peer "$pub2" endpoint 10.0.0.2:2
507 n1 ping -W 1 -c 1 192.168.241.2
508 [[ $(n2 wg show wg0 endpoints) == "$pub1 10.0.0.1:1" ]]
509 ip1 route add 10.0.0.0/24 dev veth3 src 10.0.0.3 metric 1
510 n1 bash -c 'printf 0 > /proc/sys/net/ipv4/conf/veth1/rp_filter'
511 n2 bash -c 'printf 0 > /proc/sys/net/ipv4/conf/veth4/rp_filter'
512 n1 bash -c 'printf 0 > /proc/sys/net/ipv4/conf/all/rp_filter'
513 n2 bash -c 'printf 0 > /proc/sys/net/ipv4/conf/all/rp_filter'
514 n1 ping -W 1 -c 1 192.168.241.2
515 [[ $(n2 wg show wg0 endpoints) == "$pub1 10.0.0.3:1" ]]
516
517 ip1 link del dev veth3
518 ip1 link del dev wg0
519 ip2 link del dev wg0
520
521 # Make sure persistent keep alives are sent when an adapter comes up
522 ip1 link add dev wg0 type wireguard
523 n1 wg set wg0 private-key <(echo "$key1") peer "$pub2" endpoint 10.0.0.1:1 persistent-keepalive 1
524 read _ _ tx_bytes < <(n1 wg show wg0 transfer)
525 [[ $tx_bytes -eq 0 ]]
526 ip1 link set dev wg0 up
527 read _ _ tx_bytes < <(n1 wg show wg0 transfer)
528 [[ $tx_bytes -gt 0 ]]
529 ip1 link del dev wg0
530 # This should also happen even if the private key is set later
531 ip1 link add dev wg0 type wireguard
532 n1 wg set wg0 peer "$pub2" endpoint 10.0.0.1:1 persistent-keepalive 1
533 read _ _ tx_bytes < <(n1 wg show wg0 transfer)
534 [[ $tx_bytes -eq 0 ]]
535 ip1 link set dev wg0 up
536 read _ _ tx_bytes < <(n1 wg show wg0 transfer)
537 [[ $tx_bytes -eq 0 ]]
538 n1 wg set wg0 private-key <(echo "$key1")
539 read _ _ tx_bytes < <(n1 wg show wg0 transfer)
540 [[ $tx_bytes -gt 0 ]]
541 ip1 link del dev veth1
542 ip1 link del dev wg0
543
544 # We test that Netlink/IPC is working properly by doing things that usually cause split responses
545 ip0 link add dev wg0 type wireguard
546 config=( "[Interface]" "PrivateKey=$(wg genkey)" "[Peer]" "PublicKey=$(wg genkey)" )
547 for a in {1..255}; do
548 for b in {0..255}; do
549 config+=( "AllowedIPs=$a.$b.0.0/16,$a::$b/128" )
550 done
551 done
552 n0 wg setconf wg0 <(printf '%s\n' "${config[@]}")
553 i=0
554 for ip in $(n0 wg show wg0 allowed-ips); do
555 ((++i))
556 done
557 ((i == 255*256*2+1))
558 ip0 link del wg0
559 ip0 link add dev wg0 type wireguard
560 config=( "[Interface]" "PrivateKey=$(wg genkey)" )
561 for a in {1..40}; do
562 config+=( "[Peer]" "PublicKey=$(wg genkey)" )
563 for b in {1..52}; do
564 config+=( "AllowedIPs=$a.$b.0.0/16" )
565 done
566 done
567 n0 wg setconf wg0 <(printf '%s\n' "${config[@]}")
568 i=0
569 while read -r line; do
570 j=0
571 for ip in $line; do
572 ((++j))
573 done
574 ((j == 53))
575 ((++i))
576 done < <(n0 wg show wg0 allowed-ips)
577 ((i == 40))
578 ip0 link del wg0
579 ip0 link add wg0 type wireguard
580 config=( )
581 for i in {1..29}; do
582 config+=( "[Peer]" "PublicKey=$(wg genkey)" )
583 done
584 config+=( "[Peer]" "PublicKey=$(wg genkey)" "AllowedIPs=255.2.3.4/32,abcd::255/128" )
585 n0 wg setconf wg0 <(printf '%s\n' "${config[@]}")
586 n0 wg showconf wg0 > /dev/null
587 ip0 link del wg0
588
589 allowedips=( )
590 for i in {1..197}; do
591 allowedips+=( abcd::$i )
592 done
593 saved_ifs="$IFS"
594 IFS=,
595 allowedips="${allowedips[*]}"
596 IFS="$saved_ifs"
597 ip0 link add wg0 type wireguard
598 n0 wg set wg0 peer "$pub1"
599 n0 wg set wg0 peer "$pub2" allowed-ips "$allowedips"
600 {
601 read -r pub allowedips
602 [[ $pub == "$pub1" && $allowedips == "(none)" ]]
603 read -r pub allowedips
604 [[ $pub == "$pub2" ]]
605 i=0
606 for _ in $allowedips; do
607 ((++i))
608 done
609 ((i == 197))
610 } < <(n0 wg show wg0 allowed-ips)
611 ip0 link del wg0
612
613 ! n0 wg show doesnotexist || false
614
615 ip0 link add wg0 type wireguard
616 n0 wg set wg0 private-key <(echo "$key1") peer "$pub2" preshared-key <(echo "$psk")
617 [[ $(n0 wg show wg0 private-key) == "$key1" ]]
618 [[ $(n0 wg show wg0 preshared-keys) == "$pub2 $psk" ]]
619 n0 wg set wg0 private-key /dev/null peer "$pub2" preshared-key /dev/null
620 [[ $(n0 wg show wg0 private-key) == "(none)" ]]
621 [[ $(n0 wg show wg0 preshared-keys) == "$pub2 (none)" ]]
622 n0 wg set wg0 peer "$pub2"
623 n0 wg set wg0 private-key <(echo "$key2")
624 [[ $(n0 wg show wg0 public-key) == "$pub2" ]]
625 [[ -z $(n0 wg show wg0 peers) ]]
626 n0 wg set wg0 peer "$pub2"
627 [[ -z $(n0 wg show wg0 peers) ]]
628 n0 wg set wg0 private-key <(echo "$key1")
629 n0 wg set wg0 peer "$pub2"
630 [[ $(n0 wg show wg0 peers) == "$pub2" ]]
631 n0 wg set wg0 private-key <(echo "/${key1:1}")
632 [[ $(n0 wg show wg0 private-key) == "+${key1:1}" ]]
633 n0 wg set wg0 peer "$pub2" allowed-ips 0.0.0.0/0,10.0.0.0/8,100.0.0.0/10,172.16.0.0/12,192.168.0.0/16
634 n0 wg set wg0 peer "$pub2" allowed-ips 0.0.0.0/0
635 n0 wg set wg0 peer "$pub2" allowed-ips ::/0,1700::/111,5000::/4,e000::/37,9000::/75
636 n0 wg set wg0 peer "$pub2" allowed-ips ::/0
637 n0 wg set wg0 peer "$pub2" remove
638 for low_order_point in AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA= AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA= 4Ot6fDtBuK4WVuP68Z/EatoJjeucMrH9hmIFFl9JuAA= X5yVvKNQjCSx0LFVnIPvWwREXMRYHI6G2CJO3dCfEVc= 7P///////////////////////////////////////38= 7f///////////////////////////////////////38= 7v///////////////////////////////////////38=; do
639 n0 wg set wg0 peer "$low_order_point" persistent-keepalive 1 endpoint 127.0.0.1:1111
640 done
641 [[ -n $(n0 wg show wg0 peers) ]]
642 exec 4< <(n0 ncat -l -u -p 1111)
643 ncat_pid=$!
644 waitncatudp $netns0 $ncat_pid
645 ip0 link set wg0 up
646 ! read -r -n 1 -t 2 <&4 || false
647 kill $ncat_pid
648 ip0 link del wg0
649
650 # Ensure that dst_cache references don't outlive netns lifetime
651 ip1 link add dev wg0 type wireguard
652 ip2 link add dev wg0 type wireguard
653 configure_peers
654 ip1 link add veth1 type veth peer name veth2
655 ip1 link set veth2 netns $netns2
656 ip1 addr add fd00:aa::1/64 dev veth1
657 ip2 addr add fd00:aa::2/64 dev veth2
658 ip1 link set veth1 up
659 ip2 link set veth2 up
660 waitiface $netns1 veth1
661 waitiface $netns2 veth2
662 ip1 -6 route add default dev veth1 via fd00:aa::2
663 ip2 -6 route add default dev veth2 via fd00:aa::1
664 n1 wg set wg0 peer "$pub2" endpoint [fd00:aa::2]:2
665 n2 wg set wg0 peer "$pub1" endpoint [fd00:aa::1]:1
666 n1 ping6 -c 1 fd00::2
667 pp ip netns delete $netns1
668 pp ip netns delete $netns2
669 pp ip netns add $netns1
670 pp ip netns add $netns2
671
672 # Ensure there aren't circular reference loops
673 ip1 link add wg1 type wireguard
674 ip2 link add wg2 type wireguard
675 ip1 link set wg1 netns $netns2
676 ip2 link set wg2 netns $netns1
677 pp ip netns delete $netns1
678 pp ip netns delete $netns2
679 pp ip netns add $netns1
680 pp ip netns add $netns2
681
682 sleep 2 # Wait for cleanup and grace periods
683 declare -A objects
684 while read -t 0.1 -r line 2>/dev/null || [[ $? -ne 142 ]]; do
685 [[ $line =~ .*(wg[0-9]+:\ [A-Z][a-z]+\ ?[0-9]*)\ .*(created|destroyed).* ]] || continue
686 objects["${BASH_REMATCH[1]}"]+="${BASH_REMATCH[2]}"
687 done < /dev/kmsg
688 alldeleted=1
689 for object in "${!objects[@]}"; do
690 if [[ ${objects["$object"]} != *createddestroyed && ${objects["$object"]} != *createdcreateddestroyeddestroyed ]]; then
691 echo "Error: $object: merely ${objects["$object"]}" >&3
692 alldeleted=0
693 fi
694 done
695 [[ $alldeleted -eq 1 ]]
696 pretty "" "Objects that were created were also destroyed."
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