src/basic/in-addr-util.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 /***
   5   Copyright 2014 Lennart Poettering
   6 ***/
   7
   8 #include <netinet/in.h>
   9 #include <stddef.h>
  10 #include <sys/socket.h>
  11
  12 #include "macro.h"
  13 #include "util.h"
  14
  15 union in_addr_union {
  16         struct in_addr in;
  17         struct in6_addr in6;
  18 };
  19
  20 struct in_addr_data {
  21         int family;
  22         union in_addr_union address;
  23 };
  24
  25 bool in4_addr_is_null(const struct in_addr *a);
  26 int in_addr_is_null(int family, const union in_addr_union *u);
  27
  28 int in_addr_is_multicast(int family, const union in_addr_union *u);
  29
  30 bool in4_addr_is_link_local(const struct in_addr *a);
  31 int in_addr_is_link_local(int family, const union in_addr_union *u);
  32
  33 bool in4_addr_is_localhost(const struct in_addr *a);
  34 int in_addr_is_localhost(int family, const union in_addr_union *u);
  35
  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_to_string(int family, const union in_addr_union *u, char **ret);
  40 int in_addr_ifindex_to_string(int family, const union in_addr_union *u, int ifindex, char **ret);
  41 int in_addr_from_string(int family, const char *s, union in_addr_union *ret);
  42 int in_addr_from_string_auto(const char *s, int *ret_family, union in_addr_union *ret);
  43 int in_addr_ifindex_from_string_auto(const char *s, int *family, union in_addr_union *ret, int *ifindex);
  44 unsigned char in4_addr_netmask_to_prefixlen(const struct in_addr *addr);
  45 struct in_addr* in4_addr_prefixlen_to_netmask(struct in_addr *addr, unsigned char prefixlen);
  46 int in4_addr_default_prefixlen(const struct in_addr *addr, unsigned char *prefixlen);
  47 int in4_addr_default_subnet_mask(const struct in_addr *addr, struct in_addr *mask);
  48 int in_addr_mask(int family, union in_addr_union *addr, unsigned char prefixlen);
  49 int in_addr_prefix_covers(int family, const union in_addr_union *prefix, unsigned char prefixlen, const union in_addr_union *address);
  50 int in_addr_parse_prefixlen(int family, const char *p, unsigned char *ret);
  51 int in_addr_prefix_from_string(const char *p, int family, union in_addr_union *ret_prefix, unsigned char *ret_prefixlen);
  52 int in_addr_prefix_from_string_auto(const char *p, int *ret_family, union in_addr_union *ret_prefix, unsigned char *ret_prefixlen);
  53
  54 static inline size_t FAMILY_ADDRESS_SIZE(int family) {
  55         assert(IN_SET(family, AF_INET, AF_INET6));
  56         return family == AF_INET6 ? 16 : 4;
  57 }
  58
  59 #define IN_ADDR_NULL ((union in_addr_union) {})