xref: /linux/tools/testing/selftests/wireguard/netns.sh (revision c5951e7c8ee5cb04b8b41c32bf567b90117a2124) 
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.
24set -e
25
26exec 3>&1
27export WG_HIDE_KEYS=never
28netns0="wg-test-$$-0"
29netns1="wg-test-$$-1"
30netns2="wg-test-$$-2"
31pretty() { echo -e "\x1b[32m\x1b[1m[+] ${1:+NS$1: }${2}\x1b[0m" >&3; }
32pp() { pretty "" "$*"; "$@"; }
33maybe_exec() { if [[ $BASHPID -eq $$ ]]; then "$@"; else exec "$@"; fi; }
34n0() { pretty 0 "$*"; maybe_exec ip netns exec $netns0 "$@"; }
35n1() { pretty 1 "$*"; maybe_exec ip netns exec $netns1 "$@"; }
36n2() { pretty 2 "$*"; maybe_exec ip netns exec $netns2 "$@"; }
37ip0() { pretty 0 "ip $*"; ip -n $netns0 "$@"; }
38ip1() { pretty 1 "ip $*"; ip -n $netns1 "$@"; }
39ip2() { pretty 2 "ip $*"; ip -n $netns2 "$@"; }
40sleep() { read -t "$1" -N 1 || true; }
41waitiperf() { pretty "${1//*-}" "wait for iperf:5201"; while [[ $(ss -N "$1" -tlp 'sport = 5201') != *iperf3* ]]; do sleep 0.1; done; }
42waitncatudp() { pretty "${1//*-}" "wait for udp:1111"; while [[ $(ss -N "$1" -ulp 'sport = 1111') != *ncat* ]]; do sleep 0.1; done; }
43waitncattcp() { pretty "${1//*-}" "wait for tcp:1111"; while [[ $(ss -N "$1" -tlp 'sport = 1111') != *ncat* ]]; do sleep 0.1; done; }
44waitiface() { pretty "${1//*-}" "wait for $2 to come up"; ip netns exec "$1" bash -c "while [[ \$(< \"/sys/class/net/$2/operstate\") != up ]]; do read -t .1 -N 0 || true; done;"; }
45
46cleanup() {
47	set +e
48	exec 2>/dev/null
49	printf "$orig_message_cost" > /proc/sys/net/core/message_cost
50	ip0 link del dev wg0
51	ip1 link del dev wg0
52	ip2 link del dev wg0
53	local to_kill="$(ip netns pids $netns0) $(ip netns pids $netns1) $(ip netns pids $netns2)"
54	[[ -n $to_kill ]] && kill $to_kill
55	pp ip netns del $netns1
56	pp ip netns del $netns2
57	pp ip netns del $netns0
58	exit
59}
60
61orig_message_cost="$(< /proc/sys/net/core/message_cost)"
62trap cleanup EXIT
63printf 0 > /proc/sys/net/core/message_cost
64
65ip netns del $netns0 2>/dev/null || true
66ip netns del $netns1 2>/dev/null || true
67ip netns del $netns2 2>/dev/null || true
68pp ip netns add $netns0
69pp ip netns add $netns1
70pp ip netns add $netns2
71ip0 link set up dev lo
72
73ip0 link add dev wg0 type wireguard
74ip0 link set wg0 netns $netns1
75ip0 link add dev wg0 type wireguard
76ip0 link set wg0 netns $netns2
77key1="$(pp wg genkey)"
78key2="$(pp wg genkey)"
79key3="$(pp wg genkey)"
80pub1="$(pp wg pubkey <<<"$key1")"
81pub2="$(pp wg pubkey <<<"$key2")"
82pub3="$(pp wg pubkey <<<"$key3")"
83psk="$(pp wg genpsk)"
84[[ -n $key1 && -n $key2 && -n $psk ]]
85
86configure_peers() {
87	ip1 addr add 192.168.241.1/24 dev wg0
88	ip1 addr add fd00::1/24 dev wg0
89
90	ip2 addr add 192.168.241.2/24 dev wg0
91	ip2 addr add fd00::2/24 dev wg0
92
93	n1 wg set wg0 \
94		private-key <(echo "$key1") \
95		listen-port 1 \
96		peer "$pub2" \
97			preshared-key <(echo "$psk") \
98			allowed-ips 192.168.241.2/32,fd00::2/128
99	n2 wg set wg0 \
100		private-key <(echo "$key2") \
101		listen-port 2 \
102		peer "$pub1" \
103			preshared-key <(echo "$psk") \
104			allowed-ips 192.168.241.1/32,fd00::1/128
105
106	ip1 link set up dev wg0
107	ip2 link set up dev wg0
108}
109configure_peers
110
111tests() {
112	# Ping over IPv4
113	n2 ping -c 10 -f -W 1 192.168.241.1
114	n1 ping -c 10 -f -W 1 192.168.241.2
115
116	# Ping over IPv6
117	n2 ping6 -c 10 -f -W 1 fd00::1
118	n1 ping6 -c 10 -f -W 1 fd00::2
119
120	# TCP over IPv4
121	n2 iperf3 -s -1 -B 192.168.241.2 &
122	waitiperf $netns2
123	n1 iperf3 -Z -t 3 -c 192.168.241.2
124
125	# TCP over IPv6
126	n1 iperf3 -s -1 -B fd00::1 &
127	waitiperf $netns1
128	n2 iperf3 -Z -t 3 -c fd00::1
129
130	# UDP over IPv4
131	n1 iperf3 -s -1 -B 192.168.241.1 &
132	waitiperf $netns1
133	n2 iperf3 -Z -t 3 -b 0 -u -c 192.168.241.1
134
135	# UDP over IPv6
136	n2 iperf3 -s -1 -B fd00::2 &
137	waitiperf $netns2
138	n1 iperf3 -Z -t 3 -b 0 -u -c fd00::2
139}
140
141[[ $(ip1 link show dev wg0) =~ mtu\ ([0-9]+) ]] && orig_mtu="${BASH_REMATCH[1]}"
142big_mtu=$(( 34816 - 1500 + $orig_mtu ))
143
144# Test using IPv4 as outer transport
145n1 wg set wg0 peer "$pub2" endpoint 127.0.0.1:2
146n2 wg set wg0 peer "$pub1" endpoint 127.0.0.1:1
147# Before calling tests, we first make sure that the stats counters and timestamper are working
148n2 ping -c 10 -f -W 1 192.168.241.1
149{ read _; read _; read _; read rx_bytes _; read _; read tx_bytes _; } < <(ip2 -stats link show dev wg0)
150(( rx_bytes == 1372 && (tx_bytes == 1428 || tx_bytes == 1460) ))
151{ read _; read _; read _; read rx_bytes _; read _; read tx_bytes _; } < <(ip1 -stats link show dev wg0)
152(( tx_bytes == 1372 && (rx_bytes == 1428 || rx_bytes == 1460) ))
153read _ rx_bytes tx_bytes < <(n2 wg show wg0 transfer)
154(( rx_bytes == 1372 && (tx_bytes == 1428 || tx_bytes == 1460) ))
155read _ rx_bytes tx_bytes < <(n1 wg show wg0 transfer)
156(( tx_bytes == 1372 && (rx_bytes == 1428 || rx_bytes == 1460) ))
157read _ timestamp < <(n1 wg show wg0 latest-handshakes)
158(( timestamp != 0 ))
159
160tests
161ip1 link set wg0 mtu $big_mtu
162ip2 link set wg0 mtu $big_mtu
163tests
164
165ip1 link set wg0 mtu $orig_mtu
166ip2 link set wg0 mtu $orig_mtu
167
168# Test using IPv6 as outer transport
169n1 wg set wg0 peer "$pub2" endpoint [::1]:2
170n2 wg set wg0 peer "$pub1" endpoint [::1]:1
171tests
172ip1 link set wg0 mtu $big_mtu
173ip2 link set wg0 mtu $big_mtu
174tests
175
176# Test that route MTUs work with the padding
177ip1 link set wg0 mtu 1300
178ip2 link set wg0 mtu 1300
179n1 wg set wg0 peer "$pub2" endpoint 127.0.0.1:2
180n2 wg set wg0 peer "$pub1" endpoint 127.0.0.1:1
181n0 iptables -A INPUT -m length --length 1360 -j DROP
182n1 ip route add 192.168.241.2/32 dev wg0 mtu 1299
183n2 ip route add 192.168.241.1/32 dev wg0 mtu 1299
184n2 ping -c 1 -W 1 -s 1269 192.168.241.1
185n2 ip route delete 192.168.241.1/32 dev wg0 mtu 1299
186n1 ip route delete 192.168.241.2/32 dev wg0 mtu 1299
187n0 iptables -F INPUT
188
189ip1 link set wg0 mtu $orig_mtu
190ip2 link set wg0 mtu $orig_mtu
191
192# Test using IPv4 that roaming works
193ip0 -4 addr del 127.0.0.1/8 dev lo
194ip0 -4 addr add 127.212.121.99/8 dev lo
195n1 wg set wg0 listen-port 9999
196n1 wg set wg0 peer "$pub2" endpoint 127.0.0.1:2
197n1 ping6 -W 1 -c 1 fd00::2
198[[ $(n2 wg show wg0 endpoints) == "$pub1	127.212.121.99:9999" ]]
199
200# Test using IPv6 that roaming works
201n1 wg set wg0 listen-port 9998
202n1 wg set wg0 peer "$pub2" endpoint [::1]:2
203n1 ping -W 1 -c 1 192.168.241.2
204[[ $(n2 wg show wg0 endpoints) == "$pub1	[::1]:9998" ]]
205
206# Test that crypto-RP filter works
207n1 wg set wg0 peer "$pub2" allowed-ips 192.168.241.0/24
208exec 4< <(n1 ncat -l -u -p 1111)
209ncat_pid=$!
210waitncatudp $netns1
211n2 ncat -u 192.168.241.1 1111 <<<"X"
212read -r -N 1 -t 1 out <&4 && [[ $out == "X" ]]
213kill $ncat_pid
214more_specific_key="$(pp wg genkey | pp wg pubkey)"
215n1 wg set wg0 peer "$more_specific_key" allowed-ips 192.168.241.2/32
216n2 wg set wg0 listen-port 9997
217exec 4< <(n1 ncat -l -u -p 1111)
218ncat_pid=$!
219waitncatudp $netns1
220n2 ncat -u 192.168.241.1 1111 <<<"X"
221! read -r -N 1 -t 1 out <&4 || false
222kill $ncat_pid
223n1 wg set wg0 peer "$more_specific_key" remove
224[[ $(n1 wg show wg0 endpoints) == "$pub2	[::1]:9997" ]]
225
226# Test that we can change private keys keys and immediately handshake
227n1 wg set wg0 private-key <(echo "$key1") peer "$pub2" preshared-key <(echo "$psk") allowed-ips 192.168.241.2/32 endpoint 127.0.0.1:2
228n2 wg set wg0 private-key <(echo "$key2") listen-port 2 peer "$pub1" preshared-key <(echo "$psk") allowed-ips 192.168.241.1/32
229n1 ping -W 1 -c 1 192.168.241.2
230n1 wg set wg0 private-key <(echo "$key3")
231n2 wg set wg0 peer "$pub3" preshared-key <(echo "$psk") allowed-ips 192.168.241.1/32 peer "$pub1" remove
232n1 ping -W 1 -c 1 192.168.241.2
233
234ip1 link del wg0
235ip2 link del wg0
236
237# Test using NAT. We now change the topology to this:
238# ┌────────────────────────────────────────┐    ┌────────────────────────────────────────────────┐     ┌────────────────────────────────────────┐
239# │             $ns1 namespace             │    │                 $ns0 namespace                 │     │             $ns2 namespace             │
240# │                                        │    │                                                │     │                                        │
241# │  ┌─────┐             ┌─────┐           │    │    ┌──────┐              ┌──────┐              │     │  ┌─────┐            ┌─────┐            │
242# │  │ wg0 │─────────────│vethc│───────────┼────┼────│vethrc│              │vethrs│──────────────┼─────┼──│veths│────────────│ wg0 │            │
243# │  ├─────┴──────────┐  ├─────┴──────────┐│    │    ├──────┴─────────┐    ├──────┴────────────┐ │     │  ├─────┴──────────┐ ├─────┴──────────┐ │
244# │  │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│ │
245# │  │fd00::1/24      │  │                ││    │    │                │    │SNAT:192.168.1.0/24│ │     │  │                │ │fd00::2/24      │ │
246# │  └────────────────┘  └────────────────┘│    │    └────────────────┘    └───────────────────┘ │     │  └────────────────┘ └────────────────┘ │
247# └────────────────────────────────────────┘    └────────────────────────────────────────────────┘     └────────────────────────────────────────┘
248
249ip1 link add dev wg0 type wireguard
250ip2 link add dev wg0 type wireguard
251configure_peers
252
253ip0 link add vethrc type veth peer name vethc
254ip0 link add vethrs type veth peer name veths
255ip0 link set vethc netns $netns1
256ip0 link set veths netns $netns2
257ip0 link set vethrc up
258ip0 link set vethrs up
259ip0 addr add 192.168.1.1/24 dev vethrc
260ip0 addr add 10.0.0.1/24 dev vethrs
261ip1 addr add 192.168.1.100/24 dev vethc
262ip1 link set vethc up
263ip1 route add default via 192.168.1.1
264ip2 addr add 10.0.0.100/24 dev veths
265ip2 link set veths up
266waitiface $netns0 vethrc
267waitiface $netns0 vethrs
268waitiface $netns1 vethc
269waitiface $netns2 veths
270
271n0 bash -c 'printf 1 > /proc/sys/net/ipv4/ip_forward'
272n0 bash -c 'printf 2 > /proc/sys/net/netfilter/nf_conntrack_udp_timeout'
273n0 bash -c 'printf 2 > /proc/sys/net/netfilter/nf_conntrack_udp_timeout_stream'
274n0 iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -d 10.0.0.0/24 -j SNAT --to 10.0.0.1
275
276n1 wg set wg0 peer "$pub2" endpoint 10.0.0.100:2 persistent-keepalive 1
277n1 ping -W 1 -c 1 192.168.241.2
278n2 ping -W 1 -c 1 192.168.241.1
279[[ $(n2 wg show wg0 endpoints) == "$pub1	10.0.0.1:1" ]]
280# Demonstrate n2 can still send packets to n1, since persistent-keepalive will prevent connection tracking entry from expiring (to see entries: `n0 conntrack -L`).
281pp sleep 3
282n2 ping -W 1 -c 1 192.168.241.1
283n1 wg set wg0 peer "$pub2" persistent-keepalive 0
284
285# Do a wg-quick(8)-style policy routing for the default route, making sure vethc has a v6 address to tease out bugs.
286ip1 -6 addr add fc00::9/96 dev vethc
287ip1 -6 route add default via fc00::1
288ip2 -4 addr add 192.168.99.7/32 dev wg0
289ip2 -6 addr add abab::1111/128 dev wg0
290n1 wg set wg0 fwmark 51820 peer "$pub2" allowed-ips 192.168.99.7,abab::1111
291ip1 -6 route add default dev wg0 table 51820
292ip1 -6 rule add not fwmark 51820 table 51820
293ip1 -6 rule add table main suppress_prefixlength 0
294ip1 -4 route add default dev wg0 table 51820
295ip1 -4 rule add not fwmark 51820 table 51820
296ip1 -4 rule add table main suppress_prefixlength 0
297# Flood the pings instead of sending just one, to trigger routing table reference counting bugs.
298n1 ping -W 1 -c 100 -f 192.168.99.7
299n1 ping -W 1 -c 100 -f abab::1111
300
301n0 iptables -t nat -F
302ip0 link del vethrc
303ip0 link del vethrs
304ip1 link del wg0
305ip2 link del wg0
306
307# Test that saddr routing is sticky but not too sticky, changing to this topology:
308# ┌────────────────────────────────────────┐    ┌────────────────────────────────────────┐
309# │             $ns1 namespace             │    │             $ns2 namespace             │
310# │                                        │    │                                        │
311# │  ┌─────┐             ┌─────┐           │    │  ┌─────┐            ┌─────┐            │
312# │  │ wg0 │─────────────│veth1│───────────┼────┼──│veth2│────────────│ wg0 │            │
313# │  ├─────┴──────────┐  ├─────┴──────────┐│    │  ├─────┴──────────┐ ├─────┴──────────┐ │
314# │  │192.168.241.1/24│  │10.0.0.1/24     ││    │  │10.0.0.2/24     │ │192.168.241.2/24│ │
315# │  │fd00::1/24      │  │fd00:aa::1/96   ││    │  │fd00:aa::2/96   │ │fd00::2/24      │ │
316# │  └────────────────┘  └────────────────┘│    │  └────────────────┘ └────────────────┘ │
317# └────────────────────────────────────────┘    └────────────────────────────────────────┘
318
319ip1 link add dev wg0 type wireguard
320ip2 link add dev wg0 type wireguard
321configure_peers
322ip1 link add veth1 type veth peer name veth2
323ip1 link set veth2 netns $netns2
324n1 bash -c 'printf 0 > /proc/sys/net/ipv6/conf/all/accept_dad'
325n2 bash -c 'printf 0 > /proc/sys/net/ipv6/conf/all/accept_dad'
326n1 bash -c 'printf 0 > /proc/sys/net/ipv6/conf/veth1/accept_dad'
327n2 bash -c 'printf 0 > /proc/sys/net/ipv6/conf/veth2/accept_dad'
328n1 bash -c 'printf 1 > /proc/sys/net/ipv4/conf/veth1/promote_secondaries'
329
330# First we check that we aren't overly sticky and can fall over to new IPs when old ones are removed
331ip1 addr add 10.0.0.1/24 dev veth1
332ip1 addr add fd00:aa::1/96 dev veth1
333ip2 addr add 10.0.0.2/24 dev veth2
334ip2 addr add fd00:aa::2/96 dev veth2
335ip1 link set veth1 up
336ip2 link set veth2 up
337waitiface $netns1 veth1
338waitiface $netns2 veth2
339n1 wg set wg0 peer "$pub2" endpoint 10.0.0.2:2
340n1 ping -W 1 -c 1 192.168.241.2
341ip1 addr add 10.0.0.10/24 dev veth1
342ip1 addr del 10.0.0.1/24 dev veth1
343n1 ping -W 1 -c 1 192.168.241.2
344n1 wg set wg0 peer "$pub2" endpoint [fd00:aa::2]:2
345n1 ping -W 1 -c 1 192.168.241.2
346ip1 addr add fd00:aa::10/96 dev veth1
347ip1 addr del fd00:aa::1/96 dev veth1
348n1 ping -W 1 -c 1 192.168.241.2
349
350# Now we show that we can successfully do reply to sender routing
351ip1 link set veth1 down
352ip2 link set veth2 down
353ip1 addr flush dev veth1
354ip2 addr flush dev veth2
355ip1 addr add 10.0.0.1/24 dev veth1
356ip1 addr add 10.0.0.2/24 dev veth1
357ip1 addr add fd00:aa::1/96 dev veth1
358ip1 addr add fd00:aa::2/96 dev veth1
359ip2 addr add 10.0.0.3/24 dev veth2
360ip2 addr add fd00:aa::3/96 dev veth2
361ip1 link set veth1 up
362ip2 link set veth2 up
363waitiface $netns1 veth1
364waitiface $netns2 veth2
365n2 wg set wg0 peer "$pub1" endpoint 10.0.0.1:1
366n2 ping -W 1 -c 1 192.168.241.1
367[[ $(n2 wg show wg0 endpoints) == "$pub1	10.0.0.1:1" ]]
368n2 wg set wg0 peer "$pub1" endpoint [fd00:aa::1]:1
369n2 ping -W 1 -c 1 192.168.241.1
370[[ $(n2 wg show wg0 endpoints) == "$pub1	[fd00:aa::1]:1" ]]
371n2 wg set wg0 peer "$pub1" endpoint 10.0.0.2:1
372n2 ping -W 1 -c 1 192.168.241.1
373[[ $(n2 wg show wg0 endpoints) == "$pub1	10.0.0.2:1" ]]
374n2 wg set wg0 peer "$pub1" endpoint [fd00:aa::2]:1
375n2 ping -W 1 -c 1 192.168.241.1
376[[ $(n2 wg show wg0 endpoints) == "$pub1	[fd00:aa::2]:1" ]]
377
378# What happens if the inbound destination address belongs to a different interface as the default route?
379ip1 link add dummy0 type dummy
380ip1 addr add 10.50.0.1/24 dev dummy0
381ip1 link set dummy0 up
382ip2 route add 10.50.0.0/24 dev veth2
383n2 wg set wg0 peer "$pub1" endpoint 10.50.0.1:1
384n2 ping -W 1 -c 1 192.168.241.1
385[[ $(n2 wg show wg0 endpoints) == "$pub1	10.50.0.1:1" ]]
386
387ip1 link del dummy0
388ip1 addr flush dev veth1
389ip2 addr flush dev veth2
390ip1 route flush dev veth1
391ip2 route flush dev veth2
392
393# Now we see what happens if another interface route takes precedence over an ongoing one
394ip1 link add veth3 type veth peer name veth4
395ip1 link set veth4 netns $netns2
396ip1 addr add 10.0.0.1/24 dev veth1
397ip2 addr add 10.0.0.2/24 dev veth2
398ip1 addr add 10.0.0.3/24 dev veth3
399ip1 link set veth1 up
400ip2 link set veth2 up
401ip1 link set veth3 up
402ip2 link set veth4 up
403waitiface $netns1 veth1
404waitiface $netns2 veth2
405waitiface $netns1 veth3
406waitiface $netns2 veth4
407ip1 route flush dev veth1
408ip1 route flush dev veth3
409ip1 route add 10.0.0.0/24 dev veth1 src 10.0.0.1 metric 2
410n1 wg set wg0 peer "$pub2" endpoint 10.0.0.2:2
411n1 ping -W 1 -c 1 192.168.241.2
412[[ $(n2 wg show wg0 endpoints) == "$pub1	10.0.0.1:1" ]]
413ip1 route add 10.0.0.0/24 dev veth3 src 10.0.0.3 metric 1
414n1 bash -c 'printf 0 > /proc/sys/net/ipv4/conf/veth1/rp_filter'
415n2 bash -c 'printf 0 > /proc/sys/net/ipv4/conf/veth4/rp_filter'
416n1 bash -c 'printf 0 > /proc/sys/net/ipv4/conf/all/rp_filter'
417n2 bash -c 'printf 0 > /proc/sys/net/ipv4/conf/all/rp_filter'
418n1 ping -W 1 -c 1 192.168.241.2
419[[ $(n2 wg show wg0 endpoints) == "$pub1	10.0.0.3:1" ]]
420
421ip1 link del veth1
422ip1 link del veth3
423ip1 link del wg0
424ip2 link del wg0
425
426# We test that Netlink/IPC is working properly by doing things that usually cause split responses
427ip0 link add dev wg0 type wireguard
428config=( "[Interface]" "PrivateKey=$(wg genkey)" "[Peer]" "PublicKey=$(wg genkey)" )
429for a in {1..255}; do
430	for b in {0..255}; do
431		config+=( "AllowedIPs=$a.$b.0.0/16,$a::$b/128" )
432	done
433done
434n0 wg setconf wg0 <(printf '%s\n' "${config[@]}")
435i=0
436for ip in $(n0 wg show wg0 allowed-ips); do
437	((++i))
438done
439((i == 255*256*2+1))
440ip0 link del wg0
441ip0 link add dev wg0 type wireguard
442config=( "[Interface]" "PrivateKey=$(wg genkey)" )
443for a in {1..40}; do
444	config+=( "[Peer]" "PublicKey=$(wg genkey)" )
445	for b in {1..52}; do
446		config+=( "AllowedIPs=$a.$b.0.0/16" )
447	done
448done
449n0 wg setconf wg0 <(printf '%s\n' "${config[@]}")
450i=0
451while read -r line; do
452	j=0
453	for ip in $line; do
454		((++j))
455	done
456	((j == 53))
457	((++i))
458done < <(n0 wg show wg0 allowed-ips)
459((i == 40))
460ip0 link del wg0
461ip0 link add wg0 type wireguard
462config=( )
463for i in {1..29}; do
464	config+=( "[Peer]" "PublicKey=$(wg genkey)" )
465done
466config+=( "[Peer]" "PublicKey=$(wg genkey)" "AllowedIPs=255.2.3.4/32,abcd::255/128" )
467n0 wg setconf wg0 <(printf '%s\n' "${config[@]}")
468n0 wg showconf wg0 > /dev/null
469ip0 link del wg0
470
471allowedips=( )
472for i in {1..197}; do
473        allowedips+=( abcd::$i )
474done
475saved_ifs="$IFS"
476IFS=,
477allowedips="${allowedips[*]}"
478IFS="$saved_ifs"
479ip0 link add wg0 type wireguard
480n0 wg set wg0 peer "$pub1"
481n0 wg set wg0 peer "$pub2" allowed-ips "$allowedips"
482{
483	read -r pub allowedips
484	[[ $pub == "$pub1" && $allowedips == "(none)" ]]
485	read -r pub allowedips
486	[[ $pub == "$pub2" ]]
487	i=0
488	for _ in $allowedips; do
489		((++i))
490	done
491	((i == 197))
492} < <(n0 wg show wg0 allowed-ips)
493ip0 link del wg0
494
495! n0 wg show doesnotexist || false
496
497ip0 link add wg0 type wireguard
498n0 wg set wg0 private-key <(echo "$key1") peer "$pub2" preshared-key <(echo "$psk")
499[[ $(n0 wg show wg0 private-key) == "$key1" ]]
500[[ $(n0 wg show wg0 preshared-keys) == "$pub2	$psk" ]]
501n0 wg set wg0 private-key /dev/null peer "$pub2" preshared-key /dev/null
502[[ $(n0 wg show wg0 private-key) == "(none)" ]]
503[[ $(n0 wg show wg0 preshared-keys) == "$pub2	(none)" ]]
504n0 wg set wg0 peer "$pub2"
505n0 wg set wg0 private-key <(echo "$key2")
506[[ $(n0 wg show wg0 public-key) == "$pub2" ]]
507[[ -z $(n0 wg show wg0 peers) ]]
508n0 wg set wg0 peer "$pub2"
509[[ -z $(n0 wg show wg0 peers) ]]
510n0 wg set wg0 private-key <(echo "$key1")
511n0 wg set wg0 peer "$pub2"
512[[ $(n0 wg show wg0 peers) == "$pub2" ]]
513n0 wg set wg0 private-key <(echo "/${key1:1}")
514[[ $(n0 wg show wg0 private-key) == "+${key1:1}" ]]
515n0 wg set wg0 peer "$pub2" allowed-ips 0.0.0.0/0,10.0.0.0/8,100.0.0.0/10,172.16.0.0/12,192.168.0.0/16
516n0 wg set wg0 peer "$pub2" allowed-ips 0.0.0.0/0
517n0 wg set wg0 peer "$pub2" allowed-ips ::/0,1700::/111,5000::/4,e000::/37,9000::/75
518n0 wg set wg0 peer "$pub2" allowed-ips ::/0
519ip0 link del wg0
520
521declare -A objects
522while read -t 0.1 -r line 2>/dev/null || [[ $? -ne 142 ]]; do
523	[[ $line =~ .*(wg[0-9]+:\ [A-Z][a-z]+\ [0-9]+)\ .*(created|destroyed).* ]] || continue
524	objects["${BASH_REMATCH[1]}"]+="${BASH_REMATCH[2]}"
525done < /dev/kmsg
526alldeleted=1
527for object in "${!objects[@]}"; do
528	if [[ ${objects["$object"]} != *createddestroyed ]]; then
529		echo "Error: $object: merely ${objects["$object"]}" >&3
530		alldeleted=0
531	fi
532done
533[[ $alldeleted -eq 1 ]]
534pretty "" "Objects that were created were also destroyed."
535