// 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 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=\" #% 06 x\"];\n" ;
u8 ip1[16 ], ip2[16 ], cidr1, cidr2;
char *style = "dotted" ;
u32 color = 0 ;
if (node == NULL)
return ;
if (bits == 32 ) {
fmt_connection = KERN_DEBUG "\t\" %pI4/%d\" -> \" %pI4/%d\";\n" ;
fmt_declaration = KERN_DEBUG "\t\" %pI4/%d\"[style=%s, color=\" #% 06 x\"];\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=\" #% 06 x\"];\n" ;
}
if (node->peer) {
hsiphash_key_t key = { { 0 } };
memcpy(&key, &node->peer, sizeof (node->peer));
color = hsiphash_1u32(0 xdeadbeef, &key) % 200 << 16 |
hsiphash_1u32(0 xbabecafe, &key) % 200 << 8 |
hsiphash_1u32(0 xabad1dea, &key) % 200 ;
style = "bold" ;
}
wg_allowedips_read_node(node, ip1, &cidr1);
printk(fmt_declaration, ip1, cidr1, style, color);
if (node->bit[0 ]) {
wg_allowedips_read_node(rcu_dereference_raw(node->bit[0 ]), ip2, &cidr2);
printk(fmt_connection, ip1, cidr1, ip2, cidr2);
}
if (node->bit[1 ]) {
wg_allowedips_read_node(rcu_dereference_raw(node->bit[1 ]), ip2, &cidr2);
printk(fmt_connection, ip1, cidr1, ip2, cidr2);
}
if (node->bit[0 ])
print_node(rcu_dereference_raw(node->bit[0 ]), bits);
if (node->bit[1 ])
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, 0 , sizeof (mask));
memset(&mask.all, 0 xff, cidr / 8 );
if (cidr % 32 )
mask.all[cidr / 32 ] = (__force u32)htonl(
(0 xFFFFFFFFUL << (32 - (cidr % 32 ))) & 0 xFFFFFFFFUL);
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 (other->ip_version == node->ip_version &&
!memcmp(&other->mask, &node->mask, sizeof (union nf_inet_addr)) &&
!memcmp(&other->ip, &node->ip, sizeof (union nf_inet_addr))) {
other->value = node->value;
kfree(node);
return ;
}
}
hlist_for_each_entry(other, &table->head, table) {
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;
hlist_for_each_entry(node, &table->head, table) {
if (node->ip_version == 4 && horrible_match_v4(node, ip))
return node->value;
}
return NULL;
}
static __init void *
horrible_allowedips_lookup_v6(struct horrible_allowedips *table, struct in6_addr *ip)
{
struct horrible_allowedips_node *node;
hlist_for_each_entry(node, &table->head, table) {
if (node->ip_version == 6 && horrible_match_v6(node, ip))
return node->value;
}
return NULL;
}
static __init void
horrible_allowedips_remove_by_value(struct horrible_allowedips *table, void *value)
{
struct horrible_allowedips_node *node;
struct hlist_node *h;
hlist_for_each_entry_safe(node, h, &table->head, table) {
if (node->value != value)
continue ;
hlist_del(&node->table);
kfree(node);
}
}
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);
INIT_LIST_HEAD(&peers[i]->allowedips_list);
}
mutex_lock(&mutex);
for (i = 0 ; i < NUM_RAND_ROUTES; ++i) {
get_random_bytes(ip, 4 );
cidr = get_random_u32_inclusive(1 , 32 );
peer = peers[get_random_u32_below(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 );
get_random_bytes(mutate_mask, 4 );
mutate_amount = get_random_u32_below(32 );
for (k = 0 ; k < mutate_amount / 8 ; ++k)
mutate_mask[k] = 0 xff;
mutate_mask[k] = 0 xff
<< ((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] &
get_random_u8());
cidr = get_random_u32_inclusive(1 , 32 );
peer = peers[get_random_u32_below(NUM_PEERS)];
if (wg_allowedips_insert_v4(&t,
(struct in_addr *)mutated,
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 *)mutated, cidr, peer)) {
pr_err("allowedips random self-test malloc: FAIL\n" );
goto free_locked;
}
}
}
for (i = 0 ; i < NUM_RAND_ROUTES; ++i) {
get_random_bytes(ip, 16 );
cidr = get_random_u32_inclusive(1 , 128 );
peer = peers[get_random_u32_below(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 );
get_random_bytes(mutate_mask, 16 );
mutate_amount = get_random_u32_below(128 );
for (k = 0 ; k < mutate_amount / 8 ; ++k)
mutate_mask[k] = 0 xff;
mutate_mask[k] = 0 xff
<< ((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] &
get_random_u8());
cidr = get_random_u32_inclusive(1 , 128 );
peer = peers[get_random_u32_below(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 (j = 0 ;; ++j) {
for (i = 0 ; i < NUM_QUERIES; ++i) {
get_random_bytes(ip, 4 );
if (lookup(t.root4, 32 , ip) != horrible_allowedips_lookup_v4(&h, (struct in_addr *)ip)) {
pr_err("allowedips random v4 self-test: FAIL\n" );
goto free;
}
get_random_bytes(ip, 16 );
if (lookup(t.root6, 128 , ip) != horrible_allowedips_lookup_v6(&h, (struct in6_addr *)ip)) {
pr_err("allowedips random v6 self-test: FAIL\n" );
goto free;
}
}
if (j >= NUM_PEERS)
break ;
mutex_lock(&mutex);
wg_allowedips_remove_by_peer(&t, peers[j], &mutex);
mutex_unlock(&mutex);
horrible_allowedips_remove_by_value(&h, peers[j]);
}
if (t.root4 || t.root6) {
pr_err("allowedips random self-test removal: 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 remove(version, mem, ipa, ipb, ipc, ipd, cidr) \
wg_allowedips_remove_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, 0 x26075300, 0 x60006b00, 0 , 0 xc05f0543, 128 );
insert(6 , c, 0 x26075300, 0 x60006b00, 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, 0 x24046800, 0 , 0 , 0 , 32 );
/* maskself is required */
insert(6 , h, 0 x24046800, 0 x40040800, 0 xdeadbeef, 0 xdeadbeef, 64 );
insert(6 , a, 0 x24046800, 0 x40040800, 0 xdeadbeef, 0 xdeadbeef, 128 );
insert(6 , c, 0 x24446800, 0 x40e40800, 0 xdeaebeef, 0 xdefbeef, 128 );
insert(6 , b, 0 x24446800, 0 xf0e40800, 0 xeeaebeef, 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, 0 x26075300, 0 x60006b00, 0 , 0 xc05f0543);
test(6 , c, 0 x26075300, 0 x60006b00, 0 , 0 xc02e01ee);
test(6 , f, 0 x26075300, 0 x60006b01, 0 , 0 );
test(6 , g, 0 x24046800, 0 x40040806, 0 , 0 x1006);
test(6 , g, 0 x24046800, 0 x40040806, 0 x1234, 0 x5678);
test(6 , f, 0 x240467ff, 0 x40040806, 0 x1234, 0 x5678);
test(6 , f, 0 x24046801, 0 x40040806, 0 x1234, 0 x5678);
test(6 , h, 0 x24046800, 0 x40040800, 0 x1234, 0 x5678);
test(6 , h, 0 x24046800, 0 x40040800, 0 , 0 );
test(6 , h, 0 x24046800, 0 x40040800, 0 x10101010, 0 x10101010);
test(6 , a, 0 x24046800, 0 x40040800, 0 xdeadbeef, 0 xdeadbeef);
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 );
insert(4 , a, 1 , 0 , 0 , 0 , 32 );
insert(4 , a, 192 , 0 , 0 , 0 , 24 );
insert(6 , a, 0 x24446801, 0 x40e40800, 0 xdeaebeef, 0 xdefbeef, 128 );
insert(6 , a, 0 x24446800, 0 xf0e40800, 0 xeeaebeef, 0 , 98 );
test(4 , a, 1 , 0 , 0 , 0 );
test(4 , a, 192 , 0 , 0 , 1 );
test(6 , a, 0 x24446801, 0 x40e40800, 0 xdeaebeef, 0 xdefbeef);
test(6 , a, 0 x24446800, 0 xf0e40800, 0 xeeaebeef, 0 x10101010);
/* Must be an exact match to remove */
remove(4 , a, 192 , 0 , 0 , 0 , 32 );
test(4 , a, 192 , 0 , 0 , 1 );
/* NULL peer should have no effect and return 0 */
test_boolean(!remove(4 , NULL, 192 , 0 , 0 , 0 , 24 ));
test(4 , a, 192 , 0 , 0 , 1 );
/* different peer should have no effect and return 0 */
test_boolean(!remove(4 , b, 192 , 0 , 0 , 0 , 24 ));
test(4 , a, 192 , 0 , 0 , 1 );
/* invalid CIDR should have no effect and return -EINVAL */
test_boolean(remove(4 , b, 192 , 0 , 0 , 0 , 33 ) == -EINVAL);
test(4 , a, 192 , 0 , 0 , 1 );
remove(4 , a, 192 , 0 , 0 , 0 , 24 );
test_negative(4 , a, 192 , 0 , 0 , 1 );
remove(4 , a, 1 , 0 , 0 , 0 , 32 );
test_negative(4 , a, 1 , 0 , 0 , 0 );
/* Must be an exact match to remove */
remove(6 , a, 0 x24446801, 0 x40e40800, 0 xdeaebeef, 0 xdefbeef, 96 );
test(6 , a, 0 x24446801, 0 x40e40800, 0 xdeaebeef, 0 xdefbeef);
/* NULL peer should have no effect and return 0 */
test_boolean(!remove(6 , NULL, 0 x24446801, 0 x40e40800, 0 xdeaebeef, 0 xdefbeef, 128 ));
test(6 , a, 0 x24446801, 0 x40e40800, 0 xdeaebeef, 0 xdefbeef);
/* different peer should have no effect and return 0 */
test_boolean(!remove(6 , b, 0 x24446801, 0 x40e40800, 0 xdeaebeef, 0 xdefbeef, 128 ));
test(6 , a, 0 x24446801, 0 x40e40800, 0 xdeaebeef, 0 xdefbeef);
/* invalid CIDR should have no effect and return -EINVAL */
test_boolean(remove(6 , a, 0 x24446801, 0 x40e40800, 0 xdeaebeef, 0 xdefbeef, 129 ) == -EINVAL);
test(6 , a, 0 x24446801, 0 x40e40800, 0 xdeaebeef, 0 xdefbeef);
remove(6 , a, 0 x24446801, 0 x40e40800, 0 xdeaebeef, 0 xdefbeef, 128 );
test_negative(6 , a, 0 x24446801, 0 x40e40800, 0 xdeaebeef, 0 xdefbeef);
/* Must match the peer to remove */
remove(6 , b, 0 x24446800, 0 xf0e40800, 0 xeeaebeef, 0 , 98 );
test(6 , a, 0 x24446800, 0 xf0e40800, 0 xeeaebeef, 0 x10101010);
remove(6 , a, 0 x24446800, 0 xf0e40800, 0 xeeaebeef, 0 , 98 );
test_negative(6 , a, 0 x24446800, 0 xf0e40800, 0 xeeaebeef, 0 x10101010);
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 >= MAX_ALLOWEDIPS_DEPTH) in free_node
* if something goes wrong.
*/
for (i = 0 ; i < 64 ; ++i) {
part = cpu_to_be64(~0 LLU << i);
memset(&ip, 0 xff, 8 );
memcpy((u8 *)&ip + 8 , &part, 8 );
wg_allowedips_insert_v6(&t, &ip, 128 , a, &mutex);
memcpy(&ip, &part, 8 );
memset((u8 *)&ip + 8 , 0 , 8 );
wg_allowedips_insert_v6(&t, &ip, 128 , a, &mutex);
}
memset(&ip, 0 , 16 );
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, 0 x26075300, 0 x60006b00, 0 , 0 xc05f0543, 128 );
insert(4 , a, 10 , 1 , 0 , 20 , 29 );
insert(6 , a, 0 x26075300, 0 x6d8a6bf8, 0 xdab1f1df, 0 xc05f1523, 83 );
insert(6 , a, 0 x26075300, 0 x6d8a6bf8, 0 xdab1f1df, 0 xc05f1523, 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(0 x26075300, 0 x60006b00, 0 , 0 xc05f0543),
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(0 x26075300, 0 x6d8a6bf8, 0 xdab1e000, 0 ),
sizeof (struct in6_addr)))
found_d = true ;
else if (cidr == 21 && family == AF_INET6 &&
!memcmp(ip, ip6(0 x26075000, 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
Messung V0.5 in Prozent C=96 H=91 G=93
¤ Dauer der Verarbeitung: 0.12 Sekunden
(vorverarbeitet am 2026-06-07)
¤
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