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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
3b653205 LP |
2 | #pragma once |
3 | ||
84dbb3fd | 4 | #include <arpa/inet.h> |
3b653205 | 5 | #include <netinet/in.h> |
11c3a366 TA |
6 | #include <stddef.h> |
7 | #include <sys/socket.h> | |
3b653205 | 8 | |
6c39e026 | 9 | #include "hash-funcs.h" |
3b653205 | 10 | #include "macro.h" |
3b653205 LP |
11 | |
12 | union in_addr_union { | |
13 | struct in_addr in; | |
14 | struct in6_addr in6; | |
c7dfa1df | 15 | uint8_t bytes[CONST_MAX(sizeof(struct in_addr), sizeof(struct in6_addr))]; |
3b653205 LP |
16 | }; |
17 | ||
97e5d693 LP |
18 | struct in_addr_data { |
19 | int family; | |
20 | union in_addr_union address; | |
21 | }; | |
22 | ||
34380032 | 23 | bool in4_addr_is_null(const struct in_addr *a); |
7653dcc3 YW |
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); | |
28 | static inline bool in6_addr_is_set(const struct in6_addr *a) { | |
29 | return !in6_addr_is_null(a); | |
30 | } | |
af93291c | 31 | int in_addr_is_null(int family, const union in_addr_union *u); |
7653dcc3 YW |
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 | } | |
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 | } | |
39 | static inline bool in_addr_data_is_set(const struct in_addr_data *a) { | |
40 | return in_addr_data_is_null(a); | |
41 | } | |
fdedbe26 | 42 | |
85257f48 SS |
43 | int in_addr_is_multicast(int family, const union in_addr_union *u); |
44 | ||
fdedbe26 | 45 | bool in4_addr_is_link_local(const struct in_addr *a); |
d3efcd2d | 46 | bool in4_addr_is_link_local_dynamic(const struct in_addr *a); |
1235befa | 47 | bool in6_addr_is_link_local(const struct in6_addr *a); |
af93291c | 48 | int in_addr_is_link_local(int family, const union in_addr_union *u); |
5643cfc0 | 49 | bool in6_addr_is_link_local_all_nodes(const struct in6_addr *a); |
fdedbe26 LP |
50 | |
51 | bool in4_addr_is_localhost(const struct in_addr *a); | |
d830ebbd | 52 | int in_addr_is_localhost(int family, const union in_addr_union *u); |
b69bfa43 | 53 | int in_addr_is_localhost_one(int family, const union in_addr_union *u); |
fdedbe26 | 54 | |
ccea2448 | 55 | bool in4_addr_is_local_multicast(const struct in_addr *a); |
072320ea | 56 | bool in4_addr_is_non_local(const struct in_addr *a); |
c3e96088 | 57 | bool in6_addr_is_ipv4_mapped_address(const struct in6_addr *a); |
072320ea | 58 | |
9a897e22 | 59 | bool in4_addr_equal(const struct in_addr *a, const struct in_addr *b); |
fa550434 | 60 | bool in6_addr_equal(const struct in6_addr *a, const struct in6_addr *b); |
623a4c97 | 61 | int in_addr_equal(int family, const union in_addr_union *a, const union in_addr_union *b); |
0dd25fb9 LP |
62 | int in_addr_prefix_intersect(int family, const union in_addr_union *a, unsigned aprefixlen, const union in_addr_union *b, unsigned bprefixlen); |
63 | int in_addr_prefix_next(int family, union in_addr_union *u, unsigned prefixlen); | |
863b99cd | 64 | int in_addr_prefix_nth(int family, union in_addr_union *u, unsigned prefixlen, uint64_t nth); |
c5236acd | 65 | int in_addr_random_prefix(int family, union in_addr_union *u, unsigned prefixlen_fixed_part, unsigned prefixlen); |
1534c579 YW |
66 | int in_addr_prefix_range( |
67 | int family, | |
68 | const union in_addr_union *in, | |
69 | unsigned prefixlen, | |
70 | union in_addr_union *ret_start, | |
71 | union in_addr_union *ret_end); | |
84dbb3fd | 72 | |
0dd25fb9 | 73 | int in_addr_to_string(int family, const union in_addr_union *u, char **ret); |
ae7b68db YW |
74 | static inline int in6_addr_to_string(const struct in6_addr *u, char **ret) { |
75 | return in_addr_to_string(AF_INET6, (const union in_addr_union*) u, ret); | |
76 | } | |
84dbb3fd ZJS |
77 | |
78 | static inline const char* typesafe_inet_ntop(int family, const union in_addr_union *a, char *buf, size_t len) { | |
79 | return inet_ntop(family, a, buf, len); | |
80 | } | |
81 | static inline const char* typesafe_inet_ntop4(const struct in_addr *a, char *buf, size_t len) { | |
82 | return inet_ntop(AF_INET, a, buf, len); | |
83 | } | |
84 | static inline const char* typesafe_inet_ntop6(const struct in6_addr *a, char *buf, size_t len) { | |
85 | return inet_ntop(AF_INET6, a, buf, len); | |
86 | } | |
87 | ||
88 | /* Note: the lifetime of the compound literal is the immediately surrounding block, | |
89 | * see C11 §6.5.2.5, and | |
90 | * https://stackoverflow.com/questions/34880638/compound-literal-lifetime-and-if-blocks */ | |
91 | #define IN_ADDR_MAX CONST_MAX(INET_ADDRSTRLEN, INET6_ADDRSTRLEN) | |
92 | #define IN_ADDR_TO_STRING(family, addr) typesafe_inet_ntop(family, addr, (char[IN_ADDR_MAX]){}, IN_ADDR_MAX) | |
93 | #define IN4_ADDR_TO_STRING(addr) typesafe_inet_ntop4(addr, (char[INET_ADDRSTRLEN]){}, INET_ADDRSTRLEN) | |
94 | #define IN6_ADDR_TO_STRING(addr) typesafe_inet_ntop6(addr, (char[INET6_ADDRSTRLEN]){}, INET6_ADDRSTRLEN) | |
95 | ||
c71384a9 ZJS |
96 | int in_addr_prefix_to_string( |
97 | int family, | |
98 | const union in_addr_union *u, | |
99 | unsigned prefixlen, | |
100 | char *buf, | |
101 | size_t buf_len); | |
102 | ||
103 | static inline const char* _in_addr_prefix_to_string( | |
104 | int family, | |
105 | const union in_addr_union *u, | |
106 | unsigned prefixlen, | |
107 | char *buf, | |
108 | size_t buf_len) { | |
109 | /* We assume that this is called with an appropriately sized buffer and can never fail. */ | |
110 | assert_se(in_addr_prefix_to_string(family, u, prefixlen, buf, buf_len) == 0); | |
111 | return buf; | |
ae7b68db | 112 | } |
c71384a9 ZJS |
113 | static inline const char* _in4_addr_prefix_to_string(const struct in_addr *a, unsigned prefixlen, char *buf, size_t buf_len) { |
114 | return _in_addr_prefix_to_string(AF_INET, (const union in_addr_union *) a, prefixlen, buf, buf_len); | |
115 | } | |
116 | static inline const char* _in6_addr_prefix_to_string(const struct in6_addr *a, unsigned prefixlen, char *buf, size_t buf_len) { | |
117 | return _in_addr_prefix_to_string(AF_INET6, (const union in_addr_union *) a, prefixlen, buf, buf_len); | |
ae7b68db | 118 | } |
c71384a9 ZJS |
119 | |
120 | #define PREFIX_SUFFIX_MAX (1 + DECIMAL_STR_MAX(unsigned)) | |
121 | #define IN_ADDR_PREFIX_TO_STRING(family, addr, prefixlen) \ | |
122 | _in_addr_prefix_to_string(family, addr, prefixlen, (char[IN_ADDR_MAX + PREFIX_SUFFIX_MAX]){}, IN_ADDR_MAX + PREFIX_SUFFIX_MAX) | |
123 | #define IN4_ADDR_PREFIX_TO_STRING(addr, prefixlen) \ | |
124 | _in4_addr_prefix_to_string(addr, prefixlen, (char[INET_ADDRSTRLEN + PREFIX_SUFFIX_MAX]){}, INET_ADDRSTRLEN + PREFIX_SUFFIX_MAX) | |
125 | #define IN6_ADDR_PREFIX_TO_STRING(addr, prefixlen) \ | |
126 | _in6_addr_prefix_to_string(addr, prefixlen, (char[INET6_ADDRSTRLEN + PREFIX_SUFFIX_MAX]){}, INET6_ADDRSTRLEN + PREFIX_SUFFIX_MAX) | |
127 | ||
a723fb85 | 128 | 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); |
c364cefb YW |
129 | static inline int in_addr_ifindex_to_string(int family, const union in_addr_union *u, int ifindex, char **ret) { |
130 | return in_addr_port_ifindex_name_to_string(family, u, 0, ifindex, NULL, ret); | |
131 | } | |
c4fe6583 YW |
132 | static inline int in_addr_port_to_string(int family, const union in_addr_union *u, uint16_t port, char **ret) { |
133 | return in_addr_port_ifindex_name_to_string(family, u, port, 0, NULL, ret); | |
134 | } | |
0dd25fb9 | 135 | int in_addr_from_string(int family, const char *s, union in_addr_union *ret); |
4e2d5273 | 136 | int in_addr_from_string_auto(const char *s, int *ret_family, union in_addr_union *ret); |
5c3fa98d | 137 | |
5a941f5f LP |
138 | unsigned char in4_addr_netmask_to_prefixlen(const struct in_addr *addr); |
139 | struct in_addr* in4_addr_prefixlen_to_netmask(struct in_addr *addr, unsigned char prefixlen); | |
3f36b9ed TM |
140 | struct in6_addr* in6_addr_prefixlen_to_netmask(struct in6_addr *addr, unsigned char prefixlen); |
141 | int in_addr_prefixlen_to_netmask(int family, union in_addr_union *addr, unsigned char prefixlen); | |
5a941f5f LP |
142 | int in4_addr_default_prefixlen(const struct in_addr *addr, unsigned char *prefixlen); |
143 | int in4_addr_default_subnet_mask(const struct in_addr *addr, struct in_addr *mask); | |
333f7d89 YW |
144 | int in4_addr_mask(struct in_addr *addr, unsigned char prefixlen); |
145 | int in6_addr_mask(struct in6_addr *addr, unsigned char prefixlen); | |
5a8bcb67 | 146 | int in_addr_mask(int family, union in_addr_union *addr, unsigned char prefixlen); |
e174b43f YW |
147 | int in4_addr_prefix_covers(const struct in_addr *prefix, unsigned char prefixlen, const struct in_addr *address); |
148 | int in6_addr_prefix_covers(const struct in6_addr *prefix, unsigned char prefixlen, const struct in6_addr *address); | |
1274b6c6 | 149 | int in_addr_prefix_covers(int family, const union in_addr_union *prefix, unsigned char prefixlen, const union in_addr_union *address); |
f4912f3a | 150 | int in_addr_parse_prefixlen(int family, const char *p, unsigned char *ret); |
9e0fdc21 YW |
151 | int in_addr_prefix_from_string(const char *p, int family, union in_addr_union *ret_prefix, unsigned char *ret_prefixlen); |
152 | ||
153 | typedef enum InAddrPrefixLenMode { | |
154 | PREFIXLEN_FULL, /* Default to prefixlen of address size, 32 for IPv4 or 128 for IPv6, if not specified. */ | |
155 | PREFIXLEN_REFUSE, /* Fail with -ENOANO if prefixlen is not specified. */ | |
156 | PREFIXLEN_LEGACY, /* Default to legacy default prefixlen calculation from address if not specified. */ | |
157 | } InAddrPrefixLenMode; | |
158 | ||
159 | 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); | |
a4798d4e | 160 | 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) { |
9e0fdc21 | 161 | return in_addr_prefix_from_string_auto_internal(p, PREFIXLEN_FULL, ret_family, ret_prefix, ret_prefixlen); |
a4798d4e | 162 | } |
3b653205 | 163 | |
9d485985 | 164 | static inline size_t FAMILY_ADDRESS_SIZE(int family) { |
3742095b | 165 | assert(IN_SET(family, AF_INET, AF_INET6)); |
9d485985 | 166 | return family == AF_INET6 ? 16 : 4; |
3b653205 | 167 | } |
5a8bcb67 | 168 | |
f9930401 YW |
169 | #define FAMILY_ADDRESS_SIZE_SAFE(f) \ |
170 | ({ \ | |
171 | int _f = (f); \ | |
172 | _f == AF_INET ? sizeof(struct in_addr) : \ | |
173 | _f == AF_INET6 ? sizeof(struct in6_addr) : 0; \ | |
174 | }) | |
175 | ||
adea26ee YW |
176 | /* Workaround for clang, explicitly specify the maximum-size element here. |
177 | * See also oss-fuzz#11344. */ | |
178 | #define IN_ADDR_NULL ((union in_addr_union) { .in6 = {} }) | |
6c39e026 | 179 | |
4596c836 YW |
180 | void in_addr_data_hash_func(const struct in_addr_data *a, struct siphash *state); |
181 | int in_addr_data_compare_func(const struct in_addr_data *x, const struct in_addr_data *y); | |
badd4928 YW |
182 | void in6_addr_hash_func(const struct in6_addr *addr, struct siphash *state); |
183 | int in6_addr_compare_func(const struct in6_addr *a, const struct in6_addr *b); | |
184 | ||
6c39e026 | 185 | extern const struct hash_ops in_addr_data_hash_ops; |
4596c836 | 186 | extern const struct hash_ops in_addr_data_hash_ops_free; |
2968913e | 187 | extern const struct hash_ops in6_addr_hash_ops; |
f1cb8933 | 188 | extern const struct hash_ops in6_addr_hash_ops_free; |
28032398 YW |
189 | |
190 | #define IPV4_ADDRESS_FMT_STR "%u.%u.%u.%u" | |
191 | #define IPV4_ADDRESS_FMT_VAL(address) \ | |
192 | be32toh((address).s_addr) >> 24, \ | |
193 | (be32toh((address).s_addr) >> 16) & 0xFFu, \ | |
194 | (be32toh((address).s_addr) >> 8) & 0xFFu, \ | |
195 | be32toh((address).s_addr) & 0xFFu |