1 files changed, 70 insertions, 0 deletions
diff --git a/src/basic/in-addr-util.h b/src/basic/in-addr-util.h
new file mode 100644
index 0000000..3069790
--- /dev/null
+++ b/src/basic/in-addr-util.h
@@ -0,0 +1,70 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+#pragma once
+
+#include <netinet/in.h>
+#include <stddef.h>
+#include <sys/socket.h>
+
+#include "hash-funcs.h"
+#include "macro.h"
+#include "util.h"
+
+union in_addr_union {
+        struct in_addr in;
+        struct in6_addr in6;
+};
+
+struct in_addr_data {
+        int family;
+        union in_addr_union address;
+};
+
+bool in4_addr_is_null(const struct in_addr *a);
+int in_addr_is_null(int family, const union in_addr_union *u);
+
+int in_addr_is_multicast(int family, const union in_addr_union *u);
+
+bool in4_addr_is_link_local(const struct in_addr *a);
+int in_addr_is_link_local(int family, const union in_addr_union *u);
+
+bool in4_addr_is_localhost(const struct in_addr *a);
+int in_addr_is_localhost(int family, const union in_addr_union *u);
+
+int in_addr_equal(int family, const union in_addr_union *a, const union in_addr_union *b);
+int in_addr_prefix_intersect(int family, const union in_addr_union *a, unsigned aprefixlen, const union in_addr_union *b, unsigned bprefixlen);
+int in_addr_prefix_next(int family, union in_addr_union *u, unsigned prefixlen);
+int in_addr_to_string(int family, const union in_addr_union *u, char **ret);
+int in_addr_ifindex_to_string(int family, const union in_addr_union *u, int ifindex, char **ret);
+int in_addr_from_string(int family, const char *s, union in_addr_union *ret);
+int in_addr_from_string_auto(const char *s, int *ret_family, union in_addr_union *ret);
+int in_addr_ifindex_from_string_auto(const char *s, int *family, union in_addr_union *ret, int *ifindex);
+unsigned char in4_addr_netmask_to_prefixlen(const struct in_addr *addr);
+struct in_addr* in4_addr_prefixlen_to_netmask(struct in_addr *addr, unsigned char prefixlen);
+int in4_addr_default_prefixlen(const struct in_addr *addr, unsigned char *prefixlen);
+int in4_addr_default_subnet_mask(const struct in_addr *addr, struct in_addr *mask);
+int in_addr_mask(int family, union in_addr_union *addr, unsigned char prefixlen);
+int in_addr_prefix_covers(int family, const union in_addr_union *prefix, unsigned char prefixlen, const union in_addr_union *address);
+int in_addr_parse_prefixlen(int family, const char *p, unsigned char *ret);
+int in_addr_prefix_from_string(const char *p, int family, union in_addr_union *ret_prefix, unsigned char *ret_prefixlen);
+
+typedef enum InAddrPrefixLenMode {
+        PREFIXLEN_FULL,   /* Default to prefixlen of address size, 32 for IPv4 or 128 for IPv6, if not specified. */
+        PREFIXLEN_REFUSE, /* Fail with -ENOANO if prefixlen is not specified. */
+        PREFIXLEN_LEGACY, /* Default to legacy default prefixlen calculation from address if not specified. */
+} InAddrPrefixLenMode;
+
+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);
+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) {
+        return in_addr_prefix_from_string_auto_internal(p, PREFIXLEN_FULL, ret_family, ret_prefix, ret_prefixlen);
+}
+
+static inline size_t FAMILY_ADDRESS_SIZE(int family) {
+        assert(IN_SET(family, AF_INET, AF_INET6));
+        return family == AF_INET6 ? 16 : 4;
+}
+
+/* Workaround for clang, explicitly specify the maximum-size element here.
+ * See also oss-fuzz#11344. */
+#define IN_ADDR_NULL ((union in_addr_union) { .in6 = {} })
+
+extern const struct hash_ops in_addr_data_hash_ops;