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 "$1" -N 0 || true; }
41waitiperf() { pretty "${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# suppress_prefixlength only got added in 3.12, and we want to support 3.10+.
298if [[ $(ip1 -4 rule show all) == *suppress_prefixlength* ]]; then
299	# Flood the pings instead of sending just one, to trigger routing table reference counting bugs.
300	n1 ping -W 1 -c 100 -f 192.168.99.7
301	n1 ping -W 1 -c 100 -f abab::1111
302fi
303
304n0 iptables -t nat -F
305ip0 link del vethrc
306ip0 link del vethrs
307ip1 link del wg0
308ip2 link del wg0
309
310# Test that saddr routing is sticky but not too sticky, changing to this topology:
311# ┌────────────────────────────────────────┐    ┌────────────────────────────────────────┐
312# │             $ns1 namespace             │    │             $ns2 namespace             │
313# │                                        │    │                                        │
314# │  ┌─────┐             ┌─────┐           │    │  ┌─────┐            ┌─────┐            │
315# │  │ wg0 │─────────────│veth1│───────────┼────┼──│veth2│────────────│ wg0 │            │
316# │  ├─────┴──────────┐  ├─────┴──────────┐│    │  ├─────┴──────────┐ ├─────┴──────────┐ │
317# │  │192.168.241.1/24│  │10.0.0.1/24     ││    │  │10.0.0.2/24     │ │192.168.241.2/24│ │
318# │  │fd00::1/24      │  │fd00:aa::1/96   ││    │  │fd00:aa::2/96   │ │fd00::2/24      │ │
319# │  └────────────────┘  └────────────────┘│    │  └────────────────┘ └────────────────┘ │
320# └────────────────────────────────────────┘    └────────────────────────────────────────┘
321
322ip1 link add dev wg0 type wireguard
323ip2 link add dev wg0 type wireguard
324configure_peers
325ip1 link add veth1 type veth peer name veth2
326ip1 link set veth2 netns $netns2
327n1 bash -c 'printf 0 > /proc/sys/net/ipv6/conf/all/accept_dad'
328n2 bash -c 'printf 0 > /proc/sys/net/ipv6/conf/all/accept_dad'
329n1 bash -c 'printf 0 > /proc/sys/net/ipv6/conf/veth1/accept_dad'
330n2 bash -c 'printf 0 > /proc/sys/net/ipv6/conf/veth2/accept_dad'
331n1 bash -c 'printf 1 > /proc/sys/net/ipv4/conf/veth1/promote_secondaries'
332
333# First we check that we aren't overly sticky and can fall over to new IPs when old ones are removed
334ip1 addr add 10.0.0.1/24 dev veth1
335ip1 addr add fd00:aa::1/96 dev veth1
336ip2 addr add 10.0.0.2/24 dev veth2
337ip2 addr add fd00:aa::2/96 dev veth2
338ip1 link set veth1 up
339ip2 link set veth2 up
340waitiface $netns1 veth1
341waitiface $netns2 veth2
342n1 wg set wg0 peer "$pub2" endpoint 10.0.0.2:2
343n1 ping -W 1 -c 1 192.168.241.2
344ip1 addr add 10.0.0.10/24 dev veth1
345ip1 addr del 10.0.0.1/24 dev veth1
346n1 ping -W 1 -c 1 192.168.241.2
347n1 wg set wg0 peer "$pub2" endpoint [fd00:aa::2]:2
348n1 ping -W 1 -c 1 192.168.241.2
349ip1 addr add fd00:aa::10/96 dev veth1
350ip1 addr del fd00:aa::1/96 dev veth1
351n1 ping -W 1 -c 1 192.168.241.2
352
353# Now we show that we can successfully do reply to sender routing
354ip1 link set veth1 down
355ip2 link set veth2 down
356ip1 addr flush dev veth1
357ip2 addr flush dev veth2
358ip1 addr add 10.0.0.1/24 dev veth1
359ip1 addr add 10.0.0.2/24 dev veth1
360ip1 addr add fd00:aa::1/96 dev veth1
361ip1 addr add fd00:aa::2/96 dev veth1
362ip2 addr add 10.0.0.3/24 dev veth2
363ip2 addr add fd00:aa::3/96 dev veth2
364ip1 link set veth1 up
365ip2 link set veth2 up
366waitiface $netns1 veth1
367waitiface $netns2 veth2
368n2 wg set wg0 peer "$pub1" endpoint 10.0.0.1:1
369n2 ping -W 1 -c 1 192.168.241.1
370[[ $(n2 wg show wg0 endpoints) == "$pub1	10.0.0.1:1" ]]
371n2 wg set wg0 peer "$pub1" endpoint [fd00:aa::1]:1
372n2 ping -W 1 -c 1 192.168.241.1
373[[ $(n2 wg show wg0 endpoints) == "$pub1	[fd00:aa::1]:1" ]]
374n2 wg set wg0 peer "$pub1" endpoint 10.0.0.2:1
375n2 ping -W 1 -c 1 192.168.241.1
376[[ $(n2 wg show wg0 endpoints) == "$pub1	10.0.0.2:1" ]]
377n2 wg set wg0 peer "$pub1" endpoint [fd00:aa::2]:1
378n2 ping -W 1 -c 1 192.168.241.1
379[[ $(n2 wg show wg0 endpoints) == "$pub1	[fd00:aa::2]:1" ]]
380
381# What happens if the inbound destination address belongs to a different interface as the default route?
382ip1 link add dummy0 type dummy
383ip1 addr add 10.50.0.1/24 dev dummy0
384ip1 link set dummy0 up
385ip2 route add 10.50.0.0/24 dev veth2
386n2 wg set wg0 peer "$pub1" endpoint 10.50.0.1:1
387n2 ping -W 1 -c 1 192.168.241.1
388[[ $(n2 wg show wg0 endpoints) == "$pub1	10.50.0.1:1" ]]
389
390ip1 link del dummy0
391ip1 addr flush dev veth1
392ip2 addr flush dev veth2
393ip1 route flush dev veth1
394ip2 route flush dev veth2
395
396# Now we see what happens if another interface route takes precedence over an ongoing one
397ip1 link add veth3 type veth peer name veth4
398ip1 link set veth4 netns $netns2
399ip1 addr add 10.0.0.1/24 dev veth1
400ip2 addr add 10.0.0.2/24 dev veth2
401ip1 addr add 10.0.0.3/24 dev veth3
402ip1 link set veth1 up
403ip2 link set veth2 up
404ip1 link set veth3 up
405ip2 link set veth4 up
406waitiface $netns1 veth1
407waitiface $netns2 veth2
408waitiface $netns1 veth3
409waitiface $netns2 veth4
410ip1 route flush dev veth1
411ip1 route flush dev veth3
412ip1 route add 10.0.0.0/24 dev veth1 src 10.0.0.1 metric 2
413n1 wg set wg0 peer "$pub2" endpoint 10.0.0.2:2
414n1 ping -W 1 -c 1 192.168.241.2
415[[ $(n2 wg show wg0 endpoints) == "$pub1	10.0.0.1:1" ]]
416ip1 route add 10.0.0.0/24 dev veth3 src 10.0.0.3 metric 1
417n1 bash -c 'printf 0 > /proc/sys/net/ipv4/conf/veth1/rp_filter'
418n2 bash -c 'printf 0 > /proc/sys/net/ipv4/conf/veth4/rp_filter'
419n1 bash -c 'printf 0 > /proc/sys/net/ipv4/conf/all/rp_filter'
420n2 bash -c 'printf 0 > /proc/sys/net/ipv4/conf/all/rp_filter'
421n1 ping -W 1 -c 1 192.168.241.2
422[[ $(n2 wg show wg0 endpoints) == "$pub1	10.0.0.3:1" ]]
423
424ip1 link del veth1
425ip1 link del veth3
426ip1 link del wg0
427ip2 link del wg0
428
429# We test that Netlink/IPC is working properly by doing things that usually cause split responses
430ip0 link add dev wg0 type wireguard
431config=( "[Interface]" "PrivateKey=$(wg genkey)" "[Peer]" "PublicKey=$(wg genkey)" )
432for a in {1..255}; do
433	for b in {0..255}; do
434		config+=( "AllowedIPs=$a.$b.0.0/16,$a::$b/128" )
435	done
436done
437n0 wg setconf wg0 <(printf '%s\n' "${config[@]}")
438i=0
439for ip in $(n0 wg show wg0 allowed-ips); do
440	((++i))
441done
442((i == 255*256*2+1))
443ip0 link del wg0
444ip0 link add dev wg0 type wireguard
445config=( "[Interface]" "PrivateKey=$(wg genkey)" )
446for a in {1..40}; do
447	config+=( "[Peer]" "PublicKey=$(wg genkey)" )
448	for b in {1..52}; do
449		config+=( "AllowedIPs=$a.$b.0.0/16" )
450	done
451done
452n0 wg setconf wg0 <(printf '%s\n' "${config[@]}")
453i=0
454while read -r line; do
455	j=0
456	for ip in $line; do
457		((++j))
458	done
459	((j == 53))
460	((++i))
461done < <(n0 wg show wg0 allowed-ips)
462((i == 40))
463ip0 link del wg0
464ip0 link add wg0 type wireguard
465config=( )
466for i in {1..29}; do
467	config+=( "[Peer]" "PublicKey=$(wg genkey)" )
468done
469config+=( "[Peer]" "PublicKey=$(wg genkey)" "AllowedIPs=255.2.3.4/32,abcd::255/128" )
470n0 wg setconf wg0 <(printf '%s\n' "${config[@]}")
471n0 wg showconf wg0 > /dev/null
472ip0 link del wg0
473
474allowedips=( )
475for i in {1..197}; do
476        allowedips+=( abcd::$i )
477done
478saved_ifs="$IFS"
479IFS=,
480allowedips="${allowedips[*]}"
481IFS="$saved_ifs"
482ip0 link add wg0 type wireguard
483n0 wg set wg0 peer "$pub1"
484n0 wg set wg0 peer "$pub2" allowed-ips "$allowedips"
485{
486	read -r pub allowedips
487	[[ $pub == "$pub1" && $allowedips == "(none)" ]]
488	read -r pub allowedips
489	[[ $pub == "$pub2" ]]
490	i=0
491	for _ in $allowedips; do
492		((++i))
493	done
494	((i == 197))
495} < <(n0 wg show wg0 allowed-ips)
496ip0 link del wg0
497
498! n0 wg show doesnotexist || false
499
500ip0 link add wg0 type wireguard
501n0 wg set wg0 private-key <(echo "$key1") peer "$pub2" preshared-key <(echo "$psk")
502[[ $(n0 wg show wg0 private-key) == "$key1" ]]
503[[ $(n0 wg show wg0 preshared-keys) == "$pub2	$psk" ]]
504n0 wg set wg0 private-key /dev/null peer "$pub2" preshared-key /dev/null
505[[ $(n0 wg show wg0 private-key) == "(none)" ]]
506[[ $(n0 wg show wg0 preshared-keys) == "$pub2	(none)" ]]
507n0 wg set wg0 peer "$pub2"
508n0 wg set wg0 private-key <(echo "$key2")
509[[ $(n0 wg show wg0 public-key) == "$pub2" ]]
510[[ -z $(n0 wg show wg0 peers) ]]
511n0 wg set wg0 peer "$pub2"
512[[ -z $(n0 wg show wg0 peers) ]]
513n0 wg set wg0 private-key <(echo "$key1")
514n0 wg set wg0 peer "$pub2"
515[[ $(n0 wg show wg0 peers) == "$pub2" ]]
516n0 wg set wg0 private-key <(echo "/${key1:1}")
517[[ $(n0 wg show wg0 private-key) == "+${key1:1}" ]]
518n0 wg set wg0 peer "$pub2" allowed-ips 0.0.0.0/0,10.0.0.0/8,100.0.0.0/10,172.16.0.0/12,192.168.0.0/16
519n0 wg set wg0 peer "$pub2" allowed-ips 0.0.0.0/0
520n0 wg set wg0 peer "$pub2" allowed-ips ::/0,1700::/111,5000::/4,e000::/37,9000::/75
521n0 wg set wg0 peer "$pub2" allowed-ips ::/0
522ip0 link del wg0
523
524declare -A objects
525while read -t 0.1 -r line 2>/dev/null || [[ $? -ne 142 ]]; do
526	[[ $line =~ .*(wg[0-9]+:\ [A-Z][a-z]+\ [0-9]+)\ .*(created|destroyed).* ]] || continue
527	objects["${BASH_REMATCH[1]}"]+="${BASH_REMATCH[2]}"
528done < /dev/kmsg
529alldeleted=1
530for object in "${!objects[@]}"; do
531	if [[ ${objects["$object"]} != *createddestroyed ]]; then
532		echo "Error: $object: merely ${objects["$object"]}" >&3
533		alldeleted=0
534	fi
535done
536[[ $alldeleted -eq 1 ]]
537pretty "" "Objects that were created were also destroyed."
538