summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireguard/selftest/allowedips.c
blob: 846db14cb046b9250a4722f43d60a9d69c6da9e8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
 *
 * This contains some basic static unit tests for the allowedips data structure.
 * It also has two additional modes that are disabled and meant to be used by
 * folks directly playing with this file. If you define the macro
 * DEBUG_PRINT_TRIE_GRAPHVIZ to be 1, then every time there's a full tree in
 * memory, it will be printed out as KERN_DEBUG in a format that can be passed
 * to graphviz (the dot command) to visualize it. If you define the macro
 * DEBUG_RANDOM_TRIE to be 1, then there will be an extremely costly set of
 * randomized tests done against a trivial implementation, which may take
 * upwards of a half-hour to complete. There's no set of users who should be
 * enabling these, and the only developers that should go anywhere near these
 * nobs are the ones who are reading this comment.
 */

#ifdef DEBUG

#include <linux/siphash.h>

static __init void swap_endian_and_apply_cidr(u8 *dst, const u8 *src, u8 bits,
					      u8 cidr)
{
	swap_endian(dst, src, bits);
	memset(dst + (cidr + 7) / 8, 0, bits / 8 - (cidr + 7) / 8);
	if (cidr)
		dst[(cidr + 7) / 8 - 1] &= ~0U << ((8 - (cidr % 8)) % 8);
}

static __init void print_node(struct allowedips_node *node, u8 bits)
{
	char *fmt_connection = KERN_DEBUG "\t\"%p/%d\" -> \"%p/%d\";\n";
	char *fmt_declaration = KERN_DEBUG
		"\t\"%p/%d\"[style=%s, color=\"#%06x\"];\n";
	char *style = "dotted";
	u8 ip1[16], ip2[16];
	u32 color = 0;

	if (bits == 32) {
		fmt_connection = KERN_DEBUG "\t\"%pI4/%d\" -> \"%pI4/%d\";\n";
		fmt_declaration = KERN_DEBUG
			"\t\"%pI4/%d\"[style=%s, color=\"#%06x\"];\n";
	} else if (bits == 128) {
		fmt_connection = KERN_DEBUG "\t\"%pI6/%d\" -> \"%pI6/%d\";\n";
		fmt_declaration = KERN_DEBUG
			"\t\"%pI6/%d\"[style=%s, color=\"#%06x\"];\n";
	}
	if (node->peer) {
		hsiphash_key_t key = { { 0 } };

		memcpy(&key, &node->peer, sizeof(node->peer));
		color = hsiphash_1u32(0xdeadbeef, &key) % 200 << 16 |
			hsiphash_1u32(0xbabecafe, &key) % 200 << 8 |
			hsiphash_1u32(0xabad1dea, &key) % 200;
		style = "bold";
	}
	swap_endian_and_apply_cidr(ip1, node->bits, bits, node->cidr);
	printk(fmt_declaration, ip1, node->cidr, style, color);
	if (node->bit[0]) {
		swap_endian_and_apply_cidr(ip2,
				rcu_dereference_raw(node->bit[0])->bits, bits,
				node->cidr);
		printk(fmt_connection, ip1, node->cidr, ip2,
		       rcu_dereference_raw(node->bit[0])->cidr);
		print_node(rcu_dereference_raw(node->bit[0]), bits);
	}
	if (node->bit[1]) {
		swap_endian_and_apply_cidr(ip2,
				rcu_dereference_raw(node->bit[1])->bits,
				bits, node->cidr);
		printk(fmt_connection, ip1, node->cidr, ip2,
		       rcu_dereference_raw(node->bit[1])->cidr);
		print_node(rcu_dereference_raw(node->bit[1]), bits);
	}
}

static __init void print_tree(struct allowedips_node __rcu *top, u8 bits)
{
	printk(KERN_DEBUG "digraph trie {\n");
	print_node(rcu_dereference_raw(top), bits);
	printk(KERN_DEBUG "}\n");
}

enum {
	NUM_PEERS = 2000,
	NUM_RAND_ROUTES = 400,
	NUM_MUTATED_ROUTES = 100,
	NUM_QUERIES = NUM_RAND_ROUTES * NUM_MUTATED_ROUTES * 30
};

struct horrible_allowedips {
	struct hlist_head head;
};

struct horrible_allowedips_node {
	struct hlist_node table;
	union nf_inet_addr ip;
	union nf_inet_addr mask;
	u8 ip_version;
	void *value;
};

static __init void horrible_allowedips_init(struct horrible_allowedips *table)
{
	INIT_HLIST_HEAD(&table->head);
}

static __init void horrible_allowedips_free(struct horrible_allowedips *table)
{
	struct horrible_allowedips_node *node;
	struct hlist_node *h;

	hlist_for_each_entry_safe(node, h, &table->head, table) {
		hlist_del(&node->table);
		kfree(node);
	}
}

static __init inline union nf_inet_addr horrible_cidr_to_mask(u8 cidr)
{
	union nf_inet_addr mask;

	memset(&mask, 0x00, 128 / 8);
	memset(&mask, 0xff, cidr / 8);
	if (cidr % 32)
		mask.all[cidr / 32] = (__force u32)htonl(
			(0xFFFFFFFFUL << (32 - (cidr % 32))) & 0xFFFFFFFFUL);
	return mask;
}

static __init inline u8 horrible_mask_to_cidr(union nf_inet_addr subnet)
{
	return hweight32(subnet.all[0]) + hweight32(subnet.all[1]) +
	       hweight32(subnet.all[2]) + hweight32(subnet.all[3]);
}

static __init inline void
horrible_mask_self(struct horrible_allowedips_node *node)
{
	if (node->ip_version == 4) {
		node->ip.ip &= node->mask.ip;
	} else if (node->ip_version == 6) {
		node->ip.ip6[0] &= node->mask.ip6[0];
		node->ip.ip6[1] &= node->mask.ip6[1];
		node->ip.ip6[2] &= node->mask.ip6[2];
		node->ip.ip6[3] &= node->mask.ip6[3];
	}
}

static __init inline bool
horrible_match_v4(const struct horrible_allowedips_node *node,
		  struct in_addr *ip)
{
	return (ip->s_addr & node->mask.ip) == node->ip.ip;
}

static __init inline bool
horrible_match_v6(const struct horrible_allowedips_node *node,
		  struct in6_addr *ip)
{
	return (ip->in6_u.u6_addr32[0] & node->mask.ip6[0]) ==
		       node->ip.ip6[0] &&
	       (ip->in6_u.u6_addr32[1] & node->mask.ip6[1]) ==
		       node->ip.ip6[1] &&
	       (ip->in6_u.u6_addr32[2] & node->mask.ip6[2]) ==
		       node->ip.ip6[2] &&
	       (ip->in6_u.u6_addr32[3] & node->mask.ip6[3]) == node->ip.ip6[3];
}

static __init void
horrible_insert_ordered(struct horrible_allowedips *table,
			struct horrible_allowedips_node *node)
{
	struct horrible_allowedips_node *other = NULL, *where = NULL;
	u8 my_cidr = horrible_mask_to_cidr(node->mask);

	hlist_for_each_entry(other, &table->head, table) {
		if (!memcmp(&other->mask, &node->mask,
			    sizeof(union nf_inet_addr)) &&
		    !memcmp(&other->ip, &node->ip,
			    sizeof(union nf_inet_addr)) &&
		    other->ip_version == node->ip_version) {
			other->value = node->value;
			kfree(node);
			return;
		}
		where = other;
		if (horrible_mask_to_cidr(other->mask) <= my_cidr)
			break;
	}
	if (!other && !where)
		hlist_add_head(&node->table, &table->head);
	else if (!other)
		hlist_add_behind(&node->table, &where->table);
	else
		hlist_add_before(&node->table, &where->table);
}

static __init int
horrible_allowedips_insert_v4(struct horrible_allowedips *table,
			      struct in_addr *ip, u8 cidr, void *value)
{
	struct horrible_allowedips_node *node = kzalloc(sizeof(*node),
							GFP_KERNEL);

	if (unlikely(!node))
		return -ENOMEM;
	node->ip.in = *ip;
	node->mask = horrible_cidr_to_mask(cidr);
	node->ip_version = 4;
	node->value = value;
	horrible_mask_self(node);
	horrible_insert_ordered(table, node);
	return 0;
}

static __init int
horrible_allowedips_insert_v6(struct horrible_allowedips *table,
			      struct in6_addr *ip, u8 cidr, void *value)
{
	struct horrible_allowedips_node *node = kzalloc(sizeof(*node),
							GFP_KERNEL);

	if (unlikely(!node))
		return -ENOMEM;
	node->ip.in6 = *ip;
	node->mask = horrible_cidr_to_mask(cidr);
	node->ip_version = 6;
	node->value = value;
	horrible_mask_self(node);
	horrible_insert_ordered(table, node);
	return 0;
}

static __init void *
horrible_allowedips_lookup_v4(struct horrible_allowedips *table,
			      struct in_addr *ip)
{
	struct horrible_allowedips_node *node;
	void *ret = NULL;

	hlist_for_each_entry(node, &table->head, table) {
		if (node->ip_version != 4)
			continue;
		if (horrible_match_v4(node, ip)) {
			ret = node->value;
			break;
		}
	}
	return ret;
}

static __init void *
horrible_allowedips_lookup_v6(struct horrible_allowedips *table,
			      struct in6_addr *ip)
{
	struct horrible_allowedips_node *node;
	void *ret = NULL;

	hlist_for_each_entry(node, &table->head, table) {
		if (node->ip_version != 6)
			continue;
		if (horrible_match_v6(node, ip)) {
			ret = node->value;
			break;
		}
	}
	return ret;
}

static __init bool randomized_test(void)
{
	unsigned int i, j, k, mutate_amount, cidr;
	u8 ip[16], mutate_mask[16], mutated[16];
	struct wg_peer **peers, *peer;
	struct horrible_allowedips h;
	DEFINE_MUTEX(mutex);
	struct allowedips t;
	bool ret = false;

	mutex_init(&mutex);

	wg_allowedips_init(&t);
	horrible_allowedips_init(&h);

	peers = kcalloc(NUM_PEERS, sizeof(*peers), GFP_KERNEL);
	if (unlikely(!peers)) {
		pr_err("allowedips random self-test malloc: FAIL\n");
		goto free;
	}
	for (i = 0; i < NUM_PEERS; ++i) {
		peers[i] = kzalloc(sizeof(*peers[i]), GFP_KERNEL);
		if (unlikely(!peers[i])) {
			pr_err("allowedips random self-test malloc: FAIL\n");
			goto free;
		}
		kref_init(&peers[i]->refcount);
	}

	mutex_lock(&mutex);

	for (i = 0; i < NUM_RAND_ROUTES; ++i) {
		prandom_bytes(ip, 4);
		cidr = prandom_u32_max(32) + 1;
		peer = peers[prandom_u32_max(NUM_PEERS)];
		if (wg_allowedips_insert_v4(&t, (struct in_addr *)ip, cidr,
					    peer, &mutex) < 0) {
			pr_err("allowedips random self-test malloc: FAIL\n");
			goto free_locked;
		}
		if (horrible_allowedips_insert_v4(&h, (struct in_addr *)ip,
						  cidr, peer) < 0) {
			pr_err("allowedips random self-test malloc: FAIL\n");
			goto free_locked;
		}
		for (j = 0; j < NUM_MUTATED_ROUTES; ++j) {
			memcpy(mutated, ip, 4);
			prandom_bytes(mutate_mask, 4);
			mutate_amount = prandom_u32_max(32);
			for (k = 0; k < mutate_amount / 8; ++k)
				mutate_mask[k] = 0xff;
			mutate_mask[k] = 0xff
					 << ((8 - (mutate_amount % 8)) % 8);
			for (; k < 4; ++k)
				mutate_mask[k] = 0;
			for (k = 0; k < 4; ++k)
				mutated[k] = (mutated[k] & mutate_mask[k]) |
					     (~mutate_mask[k] &
					      prandom_u32_max(256));
			cidr = prandom_u32_max(32) + 1;
			peer = peers[prandom_u32_max(NUM_PEERS)];
			if (wg_allowedips_insert_v4(&t,
						    (struct in_addr *)mutated,
						    cidr, peer, &mutex) < 0) {
				pr_err("allowedips random malloc: FAIL\n");
				goto free_locked;
			}
			if (horrible_allowedips_insert_v4(&h,
				(struct in_addr *)mutated, cidr, peer)) {
				pr_err("allowedips random self-test malloc: FAIL\n");
				goto free_locked;
			}
		}
	}

	for (i = 0; i < NUM_RAND_ROUTES; ++i) {
		prandom_bytes(ip, 16);
		cidr = prandom_u32_max(128) + 1;
		peer = peers[prandom_u32_max(NUM_PEERS)];
		if (wg_allowedips_insert_v6(&t, (struct in6_addr *)ip, cidr,
					    peer, &mutex) < 0) {
			pr_err("allowedips random self-test malloc: FAIL\n");
			goto free_locked;
		}
		if (horrible_allowedips_insert_v6(&h, (struct in6_addr *)ip,
						  cidr, peer) < 0) {
			pr_err("allowedips random self-test malloc: FAIL\n");
			goto free_locked;
		}
		for (j = 0; j < NUM_MUTATED_ROUTES; ++j) {
			memcpy(mutated, ip, 16);
			prandom_bytes(mutate_mask, 16);
			mutate_amount = prandom_u32_max(128);
			for (k = 0; k < mutate_amount / 8; ++k)
				mutate_mask[k] = 0xff;
			mutate_mask[k] = 0xff
					 << ((8 - (mutate_amount % 8)) % 8);
			for (; k < 4; ++k)
				mutate_mask[k] = 0;
			for (k = 0; k < 4; ++k)
				mutated[k] = (mutated[k] & mutate_mask[k]) |
					     (~mutate_mask[k] &
					      prandom_u32_max(256));
			cidr = prandom_u32_max(128) + 1;
			peer = peers[prandom_u32_max(NUM_PEERS)];
			if (wg_allowedips_insert_v6(&t,
						    (struct in6_addr *)mutated,
						    cidr, peer, &mutex) < 0) {
				pr_err("allowedips random self-test malloc: FAIL\n");
				goto free_locked;
			}
			if (horrible_allowedips_insert_v6(
				    &h, (struct in6_addr *)mutated, cidr,
				    peer)) {
				pr_err("allowedips random self-test malloc: FAIL\n");
				goto free_locked;
			}
		}
	}

	mutex_unlock(&mutex);

	if (IS_ENABLED(DEBUG_PRINT_TRIE_GRAPHVIZ)) {
		print_tree(t.root4, 32);
		print_tree(t.root6, 128);
	}

	for (i = 0; i < NUM_QUERIES; ++i) {
		prandom_bytes(ip, 4);
		if (lookup(t.root4, 32, ip) !=
		    horrible_allowedips_lookup_v4(&h, (struct in_addr *)ip)) {
			pr_err("allowedips random self-test: FAIL\n");
			goto free;
		}
	}

	for (i = 0; i < NUM_QUERIES; ++i) {
		prandom_bytes(ip, 16);
		if (lookup(t.root6, 128, ip) !=
		    horrible_allowedips_lookup_v6(&h, (struct in6_addr *)ip)) {
			pr_err("allowedips random self-test: FAIL\n");
			goto free;
		}
	}
	ret = true;

free:
	mutex_lock(&mutex);
free_locked:
	wg_allowedips_free(&t, &mutex);
	mutex_unlock(&mutex);
	horrible_allowedips_free(&h);
	if (peers) {
		for (i = 0; i < NUM_PEERS; ++i)
			kfree(peers[i]);
	}
	kfree(peers);
	return ret;
}

static __init inline struct in_addr *ip4(u8 a, u8 b, u8 c, u8 d)
{
	static struct in_addr ip;
	u8 *split = (u8 *)&ip;

	split[0] = a;
	split[1] = b;
	split[2] = c;
	split[3] = d;
	return &ip;
}

static __init inline struct in6_addr *ip6(u32 a, u32 b, u32 c, u32 d)
{
	static struct in6_addr ip;
	__be32 *split = (__be32 *)&ip;

	split[0] = cpu_to_be32(a);
	split[1] = cpu_to_be32(b);
	split[2] = cpu_to_be32(c);
	split[3] = cpu_to_be32(d);
	return &ip;
}

static __init struct wg_peer *init_peer(void)
{
	struct wg_peer *peer = kzalloc(sizeof(*peer), GFP_KERNEL);

	if (!peer)
		return NULL;
	kref_init(&peer->refcount);
	INIT_LIST_HEAD(&peer->allowedips_list);
	return peer;
}

#define insert(version, mem, ipa, ipb, ipc, ipd, cidr)                       \
	wg_allowedips_insert_v##version(&t, ip##version(ipa, ipb, ipc, ipd), \
					cidr, mem, &mutex)

#define maybe_fail() do {                                               \
		++i;                                                    \
		if (!_s) {                                              \
			pr_info("allowedips self-test %zu: FAIL\n", i); \
			success = false;                                \
		}                                                       \
	} while (0)

#define test(version, mem, ipa, ipb, ipc, ipd) do {                          \
		bool _s = lookup(t.root##version, (version) == 4 ? 32 : 128, \
				 ip##version(ipa, ipb, ipc, ipd)) == (mem);  \
		maybe_fail();                                                \
	} while (0)

#define test_negative(version, mem, ipa, ipb, ipc, ipd) do {                 \
		bool _s = lookup(t.root##version, (version) == 4 ? 32 : 128, \
				 ip##version(ipa, ipb, ipc, ipd)) != (mem);  \
		maybe_fail();                                                \
	} while (0)

#define test_boolean(cond) do {   \
		bool _s = (cond); \
		maybe_fail();     \
	} while (0)

bool __init wg_allowedips_selftest(void)
{
	bool found_a = false, found_b = false, found_c = false, found_d = false,
	     found_e = false, found_other = false;
	struct wg_peer *a = init_peer(), *b = init_peer(), *c = init_peer(),
		       *d = init_peer(), *e = init_peer(), *f = init_peer(),
		       *g = init_peer(), *h = init_peer();
	struct allowedips_node *iter_node;
	bool success = false;
	struct allowedips t;
	DEFINE_MUTEX(mutex);
	struct in6_addr ip;
	size_t i = 0, count = 0;
	__be64 part;

	mutex_init(&mutex);
	mutex_lock(&mutex);
	wg_allowedips_init(&t);

	if (!a || !b || !c || !d || !e || !f || !g || !h) {
		pr_err("allowedips self-test malloc: FAIL\n");
		goto free;
	}

	insert(4, a, 192, 168, 4, 0, 24);
	insert(4, b, 192, 168, 4, 4, 32);
	insert(4, c, 192, 168, 0, 0, 16);
	insert(4, d, 192, 95, 5, 64, 27);
	/* replaces previous entry, and maskself is required */
	insert(4, c, 192, 95, 5, 65, 27);
	insert(6, d, 0x26075300, 0x60006b00, 0, 0xc05f0543, 128);
	insert(6, c, 0x26075300, 0x60006b00, 0, 0, 64);
	insert(4, e, 0, 0, 0, 0, 0);
	insert(6, e, 0, 0, 0, 0, 0);
	/* replaces previous entry */
	insert(6, f, 0, 0, 0, 0, 0);
	insert(6, g, 0x24046800, 0, 0, 0, 32);
	/* maskself is required */
	insert(6, h, 0x24046800, 0x40040800, 0xdeadbeef, 0xdeadbeef, 64);
	insert(6, a, 0x24046800, 0x40040800, 0xdeadbeef, 0xdeadbeef, 128);
	insert(6, c, 0x24446800, 0x40e40800, 0xdeaebeef, 0xdefbeef, 128);
	insert(6, b, 0x24446800, 0xf0e40800, 0xeeaebeef, 0, 98);
	insert(4, g, 64, 15, 112, 0, 20);
	/* maskself is required */
	insert(4, h, 64, 15, 123, 211, 25);
	insert(4, a, 10, 0, 0, 0, 25);
	insert(4, b, 10, 0, 0, 128, 25);
	insert(4, a, 10, 1, 0, 0, 30);
	insert(4, b, 10, 1, 0, 4, 30);
	insert(4, c, 10, 1, 0, 8, 29);
	insert(4, d, 10, 1, 0, 16, 29);

	if (IS_ENABLED(DEBUG_PRINT_TRIE_GRAPHVIZ)) {
		print_tree(t.root4, 32);
		print_tree(t.root6, 128);
	}

	success = true;

	test(4, a, 192, 168, 4, 20);
	test(4, a, 192, 168, 4, 0);
	test(4, b, 192, 168, 4, 4);
	test(4, c, 192, 168, 200, 182);
	test(4, c, 192, 95, 5, 68);
	test(4, e, 192, 95, 5, 96);
	test(6, d, 0x26075300, 0x60006b00, 0, 0xc05f0543);
	test(6, c, 0x26075300, 0x60006b00, 0, 0xc02e01ee);
	test(6, f, 0x26075300, 0x60006b01, 0, 0);
	test(6, g, 0x24046800, 0x40040806, 0, 0x1006);
	test(6, g, 0x24046800, 0x40040806, 0x1234, 0x5678);
	test(6, f, 0x240467ff, 0x40040806, 0x1234, 0x5678);
	test(6, f, 0x24046801, 0x40040806, 0x1234, 0x5678);
	test(6, h, 0x24046800, 0x40040800, 0x1234, 0x5678);
	test(6, h, 0x24046800, 0x40040800, 0, 0);
	test(6, h, 0x24046800, 0x40040800, 0x10101010, 0x10101010);
	test(6, a, 0x24046800, 0x40040800, 0xdeadbeef, 0xdeadbeef);
	test(4, g, 64, 15, 116, 26);
	test(4, g, 64, 15, 127, 3);
	test(4, g, 64, 15, 123, 1);
	test(4, h, 64, 15, 123, 128);
	test(4, h, 64, 15, 123, 129);
	test(4, a, 10, 0, 0, 52);
	test(4, b, 10, 0, 0, 220);
	test(4, a, 10, 1, 0, 2);
	test(4, b, 10, 1, 0, 6);
	test(4, c, 10, 1, 0, 10);
	test(4, d, 10, 1, 0, 20);

	insert(4, a, 1, 0, 0, 0, 32);
	insert(4, a, 64, 0, 0, 0, 32);
	insert(4, a, 128, 0, 0, 0, 32);
	insert(4, a, 192, 0, 0, 0, 32);
	insert(4, a, 255, 0, 0, 0, 32);
	wg_allowedips_remove_by_peer(&t, a, &mutex);
	test_negative(4, a, 1, 0, 0, 0);
	test_negative(4, a, 64, 0, 0, 0);
	test_negative(4, a, 128, 0, 0, 0);
	test_negative(4, a, 192, 0, 0, 0);
	test_negative(4, a, 255, 0, 0, 0);

	wg_allowedips_free(&t, &mutex);
	wg_allowedips_init(&t);
	insert(4, a, 192, 168, 0, 0, 16);
	insert(4, a, 192, 168, 0, 0, 24);
	wg_allowedips_remove_by_peer(&t, a, &mutex);
	test_negative(4, a, 192, 168, 0, 1);

	/* These will hit the WARN_ON(len >= 128) in free_node if something
	 * goes wrong.
	 */
	for (i = 0; i < 128; ++i) {
		part = cpu_to_be64(~(1LLU << (i % 64)));
		memset(&ip, 0xff, 16);
		memcpy((u8 *)&ip + (i < 64) * 8, &part, 8);
		wg_allowedips_insert_v6(&t, &ip, 128, a, &mutex);
	}

	wg_allowedips_free(&t, &mutex);

	wg_allowedips_init(&t);
	insert(4, a, 192, 95, 5, 93, 27);
	insert(6, a, 0x26075300, 0x60006b00, 0, 0xc05f0543, 128);
	insert(4, a, 10, 1, 0, 20, 29);
	insert(6, a, 0x26075300, 0x6d8a6bf8, 0xdab1f1df, 0xc05f1523, 83);
	insert(6, a, 0x26075300, 0x6d8a6bf8, 0xdab1f1df, 0xc05f1523, 21);
	list_for_each_entry(iter_node, &a->allowedips_list, peer_list) {
		u8 cidr, ip[16] __aligned(__alignof(u64));
		int family = wg_allowedips_read_node(iter_node, ip, &cidr);

		count++;

		if (cidr == 27 && family == AF_INET &&
		    !memcmp(ip, ip4(192, 95, 5, 64), sizeof(struct in_addr)))
			found_a = true;
		else if (cidr == 128 && family == AF_INET6 &&
			 !memcmp(ip, ip6(0x26075300, 0x60006b00, 0, 0xc05f0543),
				 sizeof(struct in6_addr)))
			found_b = true;
		else if (cidr == 29 && family == AF_INET &&
			 !memcmp(ip, ip4(10, 1, 0, 16), sizeof(struct in_addr)))
			found_c = true;
		else if (cidr == 83 && family == AF_INET6 &&
			 !memcmp(ip, ip6(0x26075300, 0x6d8a6bf8, 0xdab1e000, 0),
				 sizeof(struct in6_addr)))
			found_d = true;
		else if (cidr == 21 && family == AF_INET6 &&
			 !memcmp(ip, ip6(0x26075000, 0, 0, 0),
				 sizeof(struct in6_addr)))
			found_e = true;
		else
			found_other = true;
	}
	test_boolean(count == 5);
	test_boolean(found_a);
	test_boolean(found_b);
	test_boolean(found_c);
	test_boolean(found_d);
	test_boolean(found_e);
	test_boolean(!found_other);

	if (IS_ENABLED(DEBUG_RANDOM_TRIE) && success)
		success = randomized_test();

	if (success)
		pr_info("allowedips self-tests: pass\n");

free:
	wg_allowedips_free(&t, &mutex);
	kfree(a);
	kfree(b);
	kfree(c);
	kfree(d);
	kfree(e);
	kfree(f);
	kfree(g);
	kfree(h);
	mutex_unlock(&mutex);

	return success;
}

#undef test_negative
#undef test
#undef remove
#undef insert
#undef init_peer

#endif