Line data    Source code

       1             : /* SPDX-License-Identifier: LGPL-2.1+ */
       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             : };
      16             : 
      17             : struct in_addr_data {
      18             :         int family;
      19             :         union in_addr_union address;
      20             : };
      21             : 
      22             : bool in4_addr_is_null(const struct in_addr *a);
      23             : int in_addr_is_null(int family, const union in_addr_union *u);
      24             : 
      25             : int in_addr_is_multicast(int family, const union in_addr_union *u);
      26             : 
      27             : bool in4_addr_is_link_local(const struct in_addr *a);
      28             : int in_addr_is_link_local(int family, const union in_addr_union *u);
      29             : 
      30             : bool in4_addr_is_localhost(const struct in_addr *a);
      31             : int in_addr_is_localhost(int family, const union in_addr_union *u);
      32             : 
      33             : bool in4_addr_is_non_local(const struct in_addr *a);
      34             : 
      35             : bool in4_addr_equal(const struct in_addr *a, const struct in_addr *b);
      36             : int in_addr_equal(int family, const union in_addr_union *a, const union in_addr_union *b);
      37             : int in_addr_prefix_intersect(int family, const union in_addr_union *a, unsigned aprefixlen, const union in_addr_union *b, unsigned bprefixlen);
      38             : int in_addr_prefix_next(int family, union in_addr_union *u, unsigned prefixlen);
      39             : int in_addr_random_prefix(int family, union in_addr_union *u, unsigned prefixlen_fixed_part, unsigned prefixlen);
      40             : int in_addr_to_string(int family, const union in_addr_union *u, char **ret);
      41             : int in_addr_prefix_to_string(int family, const union in_addr_union *u, unsigned prefixlen, char **ret);
      42             : int in_addr_ifindex_to_string(int family, const union in_addr_union *u, int ifindex, char **ret);
      43             : int in_addr_from_string(int family, const char *s, union in_addr_union *ret);
      44             : int in_addr_from_string_auto(const char *s, int *ret_family, union in_addr_union *ret);
      45             : int in_addr_ifindex_from_string_auto(const char *s, int *family, union in_addr_union *ret, int *ifindex);
      46             : unsigned char in4_addr_netmask_to_prefixlen(const struct in_addr *addr);
      47             : struct in_addr* in4_addr_prefixlen_to_netmask(struct in_addr *addr, unsigned char prefixlen);
      48             : int in4_addr_default_prefixlen(const struct in_addr *addr, unsigned char *prefixlen);
      49             : int in4_addr_default_subnet_mask(const struct in_addr *addr, struct in_addr *mask);
      50             : int in_addr_mask(int family, union in_addr_union *addr, unsigned char prefixlen);
      51             : int in_addr_prefix_covers(int family, const union in_addr_union *prefix, unsigned char prefixlen, const union in_addr_union *address);
      52             : int in_addr_parse_prefixlen(int family, const char *p, unsigned char *ret);
      53             : int in_addr_prefix_from_string(const char *p, int family, union in_addr_union *ret_prefix, unsigned char *ret_prefixlen);
      54             : 
      55             : typedef enum InAddrPrefixLenMode {
      56             :         PREFIXLEN_FULL,   /* Default to prefixlen of address size, 32 for IPv4 or 128 for IPv6, if not specified. */
      57             :         PREFIXLEN_REFUSE, /* Fail with -ENOANO if prefixlen is not specified. */
      58             :         PREFIXLEN_LEGACY, /* Default to legacy default prefixlen calculation from address if not specified. */
      59             : } InAddrPrefixLenMode;
      60             : 
      61             : 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);
      62          29 : 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) {
      63          29 :         return in_addr_prefix_from_string_auto_internal(p, PREFIXLEN_FULL, ret_family, ret_prefix, ret_prefixlen);
      64             : }
      65             : 
      66         263 : static inline size_t FAMILY_ADDRESS_SIZE(int family) {
      67         263 :         assert(IN_SET(family, AF_INET, AF_INET6));
      68         263 :         return family == AF_INET6 ? 16 : 4;
      69             : }
      70             : 
      71             : /* Workaround for clang, explicitly specify the maximum-size element here.
      72             :  * See also oss-fuzz#11344. */
      73             : #define IN_ADDR_NULL ((union in_addr_union) { .in6 = {} })
      74             : 
      75             : extern const struct hash_ops in_addr_data_hash_ops;
      76             : extern const struct hash_ops in6_addr_hash_ops;