net.h

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 * All rights reserved.
 *
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 * modification, is permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS
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 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
 * EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef UTILS_NET_H_
#define UTILS_NET_H_
 
#ifdef __cplusplus
#include <cstddef>
#include <cstdint>
#else
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#endif // __cplusplus
 
#define IN6_MAX_ASCII_LEN 39 // 32 nibbles + 7 colons
// RFC 6666 prefix 100::/64, suffix 'UltrGrS'
#define IN6_BLACKHOLE_SERVER_MODE_STR "100::556C:7472:4772:6453"
 
#ifdef __cplusplus
extern "C" {
#endif
 
struct sockaddr;
struct sockaddr_storage;
bool is_addr_linklocal(struct sockaddr *sa);
bool is_addr_loopback(struct sockaddr *sa);
bool is_addr_private(struct sockaddr *sa);
bool is_addr_multicast(const char *addr);
bool is_host_loopback(const char *hostname);
bool is_host_private(const char *hostname);
uint16_t socket_get_recv_port(int fd);
bool get_local_addresses(struct sockaddr_storage *addrs, size_t *len, int ip_version);
bool is_ipv6_supported(void);
void get_sockaddr_addr_str(struct sockaddr *sa, char *buf, size_t n);
unsigned get_sockaddr_addr_port(struct sockaddr *sa);
const char *get_sockaddr_str(struct sockaddr *sa);
const char *ug_gai_strerror(int errcode);
 
#ifdef _WIN32
#define CLOSESOCKET closesocket
#else
#define CLOSESOCKET close
#endif
 
#ifdef __cplusplus
}
#endif
 
#endif// UTILS_NET_H_