mirror of
https://github.com/morgan9e/systemd
synced 2026-04-14 16:37:19 +09:00
f102bc3e5f
Let's not leak details from src/shared and src/libsystemd into src/basic, even though you can't actually do anything useful with just forward declarations from src/shared. The sd-forward.h header is put in src/libsystemd/sd-common as we don't have a directory for shared internal headers for libsystemd yet. Let's also rename forward.h to basic-forward.h to keep things self-explanatory.
228 lines
12 KiB
C
228 lines
12 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#pragma once
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#include <netinet/in.h>
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#include "basic-forward.h"
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union in_addr_union {
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struct in_addr in;
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struct in6_addr in6;
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uint8_t bytes[CONST_MAX(sizeof(struct in_addr), sizeof(struct in6_addr))];
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};
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struct in_addr_data {
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int family;
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union in_addr_union address;
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};
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bool in4_addr_is_null(const struct in_addr *a) _pure_;
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static inline bool in4_addr_is_set(const struct in_addr *a) {
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return !in4_addr_is_null(a);
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}
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bool in6_addr_is_null(const struct in6_addr *a) _pure_;
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static inline bool in6_addr_is_set(const struct in6_addr *a) {
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return !in6_addr_is_null(a);
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}
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int in_addr_is_null(int family, const union in_addr_union *u) _pure_;
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static inline bool in_addr_is_set(int family, const union in_addr_union *u) {
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return in_addr_is_null(family, u) == 0;
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}
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static inline int in_addr_data_is_null(const struct in_addr_data *a) {
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assert(a);
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return in_addr_is_null(a->family, &a->address);
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}
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static inline bool in_addr_data_is_set(const struct in_addr_data *a) {
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return in_addr_data_is_null(a);
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}
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bool in4_addr_is_multicast(const struct in_addr *a) _pure_;
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bool in6_addr_is_multicast(const struct in6_addr *a) _pure_;
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int in_addr_is_multicast(int family, const union in_addr_union *u) _pure_;
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bool in4_addr_is_link_local(const struct in_addr *a) _pure_;
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bool in4_addr_is_link_local_dynamic(const struct in_addr *a) _pure_;
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bool in6_addr_is_link_local(const struct in6_addr *a) _pure_;
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int in_addr_is_link_local(int family, const union in_addr_union *u) _pure_;
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bool in6_addr_is_link_local_all_nodes(const struct in6_addr *a) _pure_;
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bool in4_addr_is_localhost(const struct in_addr *a) _pure_;
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int in_addr_is_localhost(int family, const union in_addr_union *u) _pure_;
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int in_addr_is_localhost_one(int family, const union in_addr_union *u) _pure_;
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bool in4_addr_is_local_multicast(const struct in_addr *a) _pure_;
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bool in4_addr_is_non_local(const struct in_addr *a) _pure_;
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bool in6_addr_is_ipv4_mapped_address(const struct in6_addr *a) _pure_;
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bool in4_addr_equal(const struct in_addr *a, const struct in_addr *b) _pure_;
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bool in6_addr_equal(const struct in6_addr *a, const struct in6_addr *b) _pure_;
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int in_addr_equal(int family, const union in_addr_union *a, const union in_addr_union *b) _pure_;
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bool in4_addr_prefix_intersect(
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const struct in_addr *a,
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unsigned aprefixlen,
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const struct in_addr *b,
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unsigned bprefixlen) _pure_;
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bool in6_addr_prefix_intersect(
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const struct in6_addr *a,
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unsigned aprefixlen,
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const struct in6_addr *b,
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unsigned bprefixlen) _pure_;
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int in_addr_prefix_intersect(
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int family,
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const union in_addr_union *a,
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unsigned aprefixlen,
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const union in_addr_union *b,
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unsigned bprefixlen) _pure_;
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int in_addr_prefix_next(int family, union in_addr_union *u, unsigned prefixlen);
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int in_addr_prefix_nth(int family, union in_addr_union *u, unsigned prefixlen, uint64_t nth);
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int in_addr_random_prefix(int family, union in_addr_union *u, unsigned prefixlen_fixed_part, unsigned prefixlen);
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int in_addr_prefix_range(
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int family,
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const union in_addr_union *in,
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unsigned prefixlen,
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union in_addr_union *ret_start,
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union in_addr_union *ret_end);
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int in_addr_to_string(int family, const union in_addr_union *u, char **ret);
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static inline int in6_addr_to_string(const struct in6_addr *u, char **ret) {
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return in_addr_to_string(AF_INET6, (const union in_addr_union*) u, ret);
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}
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const char* typesafe_inet_ntop(int family, const union in_addr_union *a, char *buf, size_t len);
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const char* typesafe_inet_ntop4(const struct in_addr *a, char *buf, size_t len);
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const char* typesafe_inet_ntop6(const struct in6_addr *a, char *buf, size_t len);
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/* Note: the lifetime of the compound literal is the immediately surrounding block,
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* see C11 §6.5.2.5, and
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* https://stackoverflow.com/questions/34880638/compound-literal-lifetime-and-if-blocks */
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#define IN_ADDR_MAX CONST_MAX(INET_ADDRSTRLEN, INET6_ADDRSTRLEN)
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#define IN_ADDR_TO_STRING(family, addr) typesafe_inet_ntop(family, addr, (char[IN_ADDR_MAX]){}, IN_ADDR_MAX)
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#define IN4_ADDR_TO_STRING(addr) typesafe_inet_ntop4(addr, (char[INET_ADDRSTRLEN]){}, INET_ADDRSTRLEN)
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#define IN6_ADDR_TO_STRING(addr) typesafe_inet_ntop6(addr, (char[INET6_ADDRSTRLEN]){}, INET6_ADDRSTRLEN)
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int in_addr_prefix_to_string(
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int family,
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const union in_addr_union *u,
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unsigned prefixlen,
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char *buf,
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size_t buf_len);
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static inline const char* _in_addr_prefix_to_string(
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int family,
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const union in_addr_union *u,
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unsigned prefixlen,
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char *buf,
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size_t buf_len) {
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/* We assume that this is called with an appropriately sized buffer and can never fail. */
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assert_se(in_addr_prefix_to_string(family, u, prefixlen, buf, buf_len) == 0);
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return buf;
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}
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static inline const char* _in4_addr_prefix_to_string(const struct in_addr *a, unsigned prefixlen, char *buf, size_t buf_len) {
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return _in_addr_prefix_to_string(AF_INET, (const union in_addr_union *) a, prefixlen, buf, buf_len);
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}
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static inline const char* _in6_addr_prefix_to_string(const struct in6_addr *a, unsigned prefixlen, char *buf, size_t buf_len) {
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return _in_addr_prefix_to_string(AF_INET6, (const union in_addr_union *) a, prefixlen, buf, buf_len);
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}
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#define PREFIX_SUFFIX_MAX (1 + DECIMAL_STR_MAX(unsigned))
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#define IN_ADDR_PREFIX_TO_STRING(family, addr, prefixlen) \
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_in_addr_prefix_to_string(family, addr, prefixlen, (char[IN_ADDR_MAX + PREFIX_SUFFIX_MAX]){}, IN_ADDR_MAX + PREFIX_SUFFIX_MAX)
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#define IN4_ADDR_PREFIX_TO_STRING(addr, prefixlen) \
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_in4_addr_prefix_to_string(addr, prefixlen, (char[INET_ADDRSTRLEN + PREFIX_SUFFIX_MAX]){}, INET_ADDRSTRLEN + PREFIX_SUFFIX_MAX)
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#define IN6_ADDR_PREFIX_TO_STRING(addr, prefixlen) \
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_in6_addr_prefix_to_string(addr, prefixlen, (char[INET6_ADDRSTRLEN + PREFIX_SUFFIX_MAX]){}, INET6_ADDRSTRLEN + PREFIX_SUFFIX_MAX)
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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);
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static inline int in_addr_ifindex_to_string(int family, const union in_addr_union *u, int ifindex, char **ret) {
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return in_addr_port_ifindex_name_to_string(family, u, 0, ifindex, NULL, ret);
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}
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static inline int in_addr_port_to_string(int family, const union in_addr_union *u, uint16_t port, char **ret) {
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return in_addr_port_ifindex_name_to_string(family, u, port, 0, NULL, ret);
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}
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int in_addr_from_string(int family, const char *s, union in_addr_union *ret);
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int in_addr_from_string_auto(const char *s, int *ret_family, union in_addr_union *ret);
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unsigned char in4_addr_netmask_to_prefixlen(const struct in_addr *addr);
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struct in_addr* in4_addr_prefixlen_to_netmask(struct in_addr *addr, unsigned char prefixlen);
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struct in6_addr* in6_addr_prefixlen_to_netmask(struct in6_addr *addr, unsigned char prefixlen);
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int in_addr_prefixlen_to_netmask(int family, union in_addr_union *addr, unsigned char prefixlen);
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int in4_addr_default_prefixlen(const struct in_addr *addr, unsigned char *prefixlen);
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int in4_addr_default_subnet_mask(const struct in_addr *addr, struct in_addr *mask);
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int in4_addr_mask(struct in_addr *addr, unsigned char prefixlen);
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int in6_addr_mask(struct in6_addr *addr, unsigned char prefixlen);
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int in_addr_mask(int family, union in_addr_union *addr, unsigned char prefixlen);
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int in4_addr_prefix_covers_full(const struct in_addr *prefix, unsigned char prefixlen, const struct in_addr *address, unsigned char address_prefixlen);
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int in6_addr_prefix_covers_full(const struct in6_addr *prefix, unsigned char prefixlen, const struct in6_addr *address, unsigned char address_prefixlen);
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int in_addr_prefix_covers_full(int family, const union in_addr_union *prefix, unsigned char prefixlen, const union in_addr_union *address, unsigned char address_prefixlen);
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static inline int in4_addr_prefix_covers(const struct in_addr *prefix, unsigned char prefixlen, const struct in_addr *address) {
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return in4_addr_prefix_covers_full(prefix, prefixlen, address, 32);
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}
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static inline int in6_addr_prefix_covers(const struct in6_addr *prefix, unsigned char prefixlen, const struct in6_addr *address) {
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return in6_addr_prefix_covers_full(prefix, prefixlen, address, 128);
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}
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static inline int in_addr_prefix_covers(int family, const union in_addr_union *prefix, unsigned char prefixlen, const union in_addr_union *address) {
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return in_addr_prefix_covers_full(family, prefix, prefixlen, address, family == AF_INET ? 32 : family == AF_INET6 ? 128 : 0);
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}
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int in_addr_parse_prefixlen(int family, const char *p, unsigned char *ret);
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int in_addr_prefix_from_string(const char *p, int family, union in_addr_union *ret_prefix, unsigned char *ret_prefixlen);
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typedef enum InAddrPrefixLenMode {
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PREFIXLEN_FULL, /* Default to prefixlen of address size, 32 for IPv4 or 128 for IPv6, if not specified. */
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PREFIXLEN_REFUSE, /* Fail with -ENOANO if prefixlen is not specified. */
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} InAddrPrefixLenMode;
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int in_addr_prefix_from_string_auto_full(const char *p, InAddrPrefixLenMode mode, int *ret_family, union in_addr_union *ret_prefix, unsigned char *ret_prefixlen);
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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) {
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return in_addr_prefix_from_string_auto_full(p, PREFIXLEN_FULL, ret_family, ret_prefix, ret_prefixlen);
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}
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static inline size_t FAMILY_ADDRESS_SIZE(int family) {
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switch (family) {
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case AF_INET:
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return 4;
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case AF_INET6:
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return 16;
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default:
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assert_not_reached();
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}
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}
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#define FAMILY_ADDRESS_SIZE_SAFE(f) \
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({ \
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int _f = (f); \
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_f == AF_INET ? sizeof(struct in_addr) : \
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_f == AF_INET6 ? sizeof(struct in6_addr) : 0; \
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})
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/* Workaround for clang, explicitly specify the maximum-size element here.
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* See also oss-fuzz#11344. */
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#define IN_ADDR_NULL ((union in_addr_union) { .in6 = {} })
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void in_addr_hash_func(const union in_addr_union *u, int family, struct siphash *state);
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void in_addr_data_hash_func(const struct in_addr_data *a, struct siphash *state);
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int in_addr_data_compare_func(const struct in_addr_data *x, const struct in_addr_data *y);
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void in6_addr_hash_func(const struct in6_addr *addr, struct siphash *state);
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int in6_addr_compare_func(const struct in6_addr *a, const struct in6_addr *b);
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extern const struct hash_ops in_addr_data_hash_ops;
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extern const struct hash_ops in_addr_data_hash_ops_free;
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extern const struct hash_ops in6_addr_hash_ops;
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extern const struct hash_ops in6_addr_hash_ops_free;
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static inline void PTR_TO_IN4_ADDR(const void *p, struct in_addr *ret) {
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assert(ret);
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ret->s_addr = (uint32_t) ((uintptr_t) p);
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}
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static inline void* IN4_ADDR_TO_PTR(const struct in_addr *a) {
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assert(a);
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return (void*) ((uintptr_t) a->s_addr);
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}
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#define IPV4_ADDRESS_FMT_STR "%u.%u.%u.%u"
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#define IPV4_ADDRESS_FMT_VAL(address) \
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be32toh((address).s_addr) >> 24, \
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(be32toh((address).s_addr) >> 16) & 0xFFu, \
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(be32toh((address).s_addr) >> 8) & 0xFFu, \
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be32toh((address).s_addr) & 0xFFu
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