1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
2 #pragma once
3
4 #include <netinet/in.h>
5 #include <stddef.h>
6 #include <sys/socket.h>
7
8 #include "hash-funcs.h"
9 #include "macro.h"
10 #include "util.h"
11
12 union in_addr_union {
13 struct in_addr in;
14 struct in6_addr in6;
15 uint8_t bytes[CONST_MAX(sizeof(struct in_addr), sizeof(struct in6_addr))];
16 };
17
18 struct in_addr_data {
19 int family;
20 union in_addr_union address;
21 };
22
23 bool in4_addr_is_null(const struct in_addr *a);
in4_addr_is_set(const struct in_addr * a)24 static inline bool in4_addr_is_set(const struct in_addr *a) {
25 return !in4_addr_is_null(a);
26 }
27 bool in6_addr_is_null(const struct in6_addr *a);
in6_addr_is_set(const struct in6_addr * a)28 static inline bool in6_addr_is_set(const struct in6_addr *a) {
29 return !in6_addr_is_null(a);
30 }
31 int in_addr_is_null(int family, const union in_addr_union *u);
in_addr_is_set(int family,const union in_addr_union * u)32 static inline bool in_addr_is_set(int family, const union in_addr_union *u) {
33 return in_addr_is_null(family, u) == 0;
34 }
in_addr_data_is_null(const struct in_addr_data * a)35 static inline int in_addr_data_is_null(const struct in_addr_data *a) {
36 assert(a);
37 return in_addr_is_null(a->family, &a->address);
38 }
in_addr_data_is_set(const struct in_addr_data * a)39 static inline bool in_addr_data_is_set(const struct in_addr_data *a) {
40 return in_addr_data_is_null(a);
41 }
42
43 int in_addr_is_multicast(int family, const union in_addr_union *u);
44
45 bool in4_addr_is_link_local(const struct in_addr *a);
46 bool in6_addr_is_link_local(const struct in6_addr *a);
47 int in_addr_is_link_local(int family, const union in_addr_union *u);
48 bool in6_addr_is_link_local_all_nodes(const struct in6_addr *a);
49
50 bool in4_addr_is_localhost(const struct in_addr *a);
51 int in_addr_is_localhost(int family, const union in_addr_union *u);
52 int in_addr_is_localhost_one(int family, const union in_addr_union *u);
53
54 bool in4_addr_is_local_multicast(const struct in_addr *a);
55 bool in4_addr_is_non_local(const struct in_addr *a);
56 bool in6_addr_is_ipv4_mapped_address(const struct in6_addr *a);
57
58 bool in4_addr_equal(const struct in_addr *a, const struct in_addr *b);
59 bool in6_addr_equal(const struct in6_addr *a, const struct in6_addr *b);
60 int in_addr_equal(int family, const union in_addr_union *a, const union in_addr_union *b);
61 int in_addr_prefix_intersect(int family, const union in_addr_union *a, unsigned aprefixlen, const union in_addr_union *b, unsigned bprefixlen);
62 int in_addr_prefix_next(int family, union in_addr_union *u, unsigned prefixlen);
63 int in_addr_prefix_nth(int family, union in_addr_union *u, unsigned prefixlen, uint64_t nth);
64 int in_addr_random_prefix(int family, union in_addr_union *u, unsigned prefixlen_fixed_part, unsigned prefixlen);
65 int in_addr_prefix_range(
66 int family,
67 const union in_addr_union *in,
68 unsigned prefixlen,
69 union in_addr_union *ret_start,
70 union in_addr_union *ret_end);
71 int in_addr_to_string(int family, const union in_addr_union *u, char **ret);
in6_addr_to_string(const struct in6_addr * u,char ** ret)72 static inline int in6_addr_to_string(const struct in6_addr *u, char **ret) {
73 return in_addr_to_string(AF_INET6, (const union in_addr_union*) u, ret);
74 }
75 int in_addr_prefix_to_string(int family, const union in_addr_union *u, unsigned prefixlen, char **ret);
in6_addr_prefix_to_string(const struct in6_addr * u,unsigned prefixlen,char ** ret)76 static inline int in6_addr_prefix_to_string(const struct in6_addr *u, unsigned prefixlen, char **ret) {
77 return in_addr_prefix_to_string(AF_INET6, (const union in_addr_union*) u, prefixlen, ret);
78 }
79 int in_addr_port_ifindex_name_to_string(int family, const union in_addr_union *u, uint16_t port, int ifindex, const char *server_name, char **ret);
in_addr_ifindex_to_string(int family,const union in_addr_union * u,int ifindex,char ** ret)80 static inline int in_addr_ifindex_to_string(int family, const union in_addr_union *u, int ifindex, char **ret) {
81 return in_addr_port_ifindex_name_to_string(family, u, 0, ifindex, NULL, ret);
82 }
in_addr_port_to_string(int family,const union in_addr_union * u,uint16_t port,char ** ret)83 static inline int in_addr_port_to_string(int family, const union in_addr_union *u, uint16_t port, char **ret) {
84 return in_addr_port_ifindex_name_to_string(family, u, port, 0, NULL, ret);
85 }
86 int in_addr_from_string(int family, const char *s, union in_addr_union *ret);
87 int in_addr_from_string_auto(const char *s, int *ret_family, union in_addr_union *ret);
88
89 unsigned char in4_addr_netmask_to_prefixlen(const struct in_addr *addr);
90 struct in_addr* in4_addr_prefixlen_to_netmask(struct in_addr *addr, unsigned char prefixlen);
91 int in4_addr_default_prefixlen(const struct in_addr *addr, unsigned char *prefixlen);
92 int in4_addr_default_subnet_mask(const struct in_addr *addr, struct in_addr *mask);
93 int in4_addr_mask(struct in_addr *addr, unsigned char prefixlen);
94 int in6_addr_mask(struct in6_addr *addr, unsigned char prefixlen);
95 int in_addr_mask(int family, union in_addr_union *addr, unsigned char prefixlen);
96 int in4_addr_prefix_covers(const struct in_addr *prefix, unsigned char prefixlen, const struct in_addr *address);
97 int in6_addr_prefix_covers(const struct in6_addr *prefix, unsigned char prefixlen, const struct in6_addr *address);
98 int in_addr_prefix_covers(int family, const union in_addr_union *prefix, unsigned char prefixlen, const union in_addr_union *address);
99 int in_addr_parse_prefixlen(int family, const char *p, unsigned char *ret);
100 int in_addr_prefix_from_string(const char *p, int family, union in_addr_union *ret_prefix, unsigned char *ret_prefixlen);
101
102 typedef enum InAddrPrefixLenMode {
103 PREFIXLEN_FULL, /* Default to prefixlen of address size, 32 for IPv4 or 128 for IPv6, if not specified. */
104 PREFIXLEN_REFUSE, /* Fail with -ENOANO if prefixlen is not specified. */
105 PREFIXLEN_LEGACY, /* Default to legacy default prefixlen calculation from address if not specified. */
106 } InAddrPrefixLenMode;
107
108 int in_addr_prefix_from_string_auto_internal(const char *p, InAddrPrefixLenMode mode, int *ret_family, union in_addr_union *ret_prefix, unsigned char *ret_prefixlen);
in_addr_prefix_from_string_auto(const char * p,int * ret_family,union in_addr_union * ret_prefix,unsigned char * ret_prefixlen)109 static inline int in_addr_prefix_from_string_auto(const char *p, int *ret_family, union in_addr_union *ret_prefix, unsigned char *ret_prefixlen) {
110 return in_addr_prefix_from_string_auto_internal(p, PREFIXLEN_FULL, ret_family, ret_prefix, ret_prefixlen);
111 }
112
FAMILY_ADDRESS_SIZE(int family)113 static inline size_t FAMILY_ADDRESS_SIZE(int family) {
114 assert(IN_SET(family, AF_INET, AF_INET6));
115 return family == AF_INET6 ? 16 : 4;
116 }
117
118 #define FAMILY_ADDRESS_SIZE_SAFE(f) \
119 ({ \
120 int _f = (f); \
121 _f == AF_INET ? sizeof(struct in_addr) : \
122 _f == AF_INET6 ? sizeof(struct in6_addr) : 0; \
123 })
124
125 /* Workaround for clang, explicitly specify the maximum-size element here.
126 * See also oss-fuzz#11344. */
127 #define IN_ADDR_NULL ((union in_addr_union) { .in6 = {} })
128
129 void in6_addr_hash_func(const struct in6_addr *addr, struct siphash *state);
130 int in6_addr_compare_func(const struct in6_addr *a, const struct in6_addr *b);
131
132 extern const struct hash_ops in_addr_data_hash_ops;
133 extern const struct hash_ops in6_addr_hash_ops;
134 extern const struct hash_ops in6_addr_hash_ops_free;
135
136 #define IPV4_ADDRESS_FMT_STR "%u.%u.%u.%u"
137 #define IPV4_ADDRESS_FMT_VAL(address) \
138 be32toh((address).s_addr) >> 24, \
139 (be32toh((address).s_addr) >> 16) & 0xFFu, \
140 (be32toh((address).s_addr) >> 8) & 0xFFu, \
141 be32toh((address).s_addr) & 0xFFu
142