/*
 * Replacement implementation of getnameinfo.
 *
 * This is an implementation of the getnameinfo function for systems that lack
 * it, so that code can use getnameinfo always.  It provides IPv4 support
 * only; for IPv6 support, a native getnameinfo implemenation is required.
 *
 * This file should generally be included by way of portable/socket.h rather
 * than directly.
 *
 * Written by Russ Allbery <rra@stanford.edu>
 * This work is hereby placed in the public domain by its author.
 */

#ifndef PORTABLE_GETNAMEINFO_H
#define PORTABLE_GETNAMEINFO_H 1

#include <config.h>
#include <portable/macros.h>

/* Skip this entire file if a system getaddrinfo was detected. */
#if !HAVE_GETNAMEINFO

#include <sys/socket.h>

/* Constants for flags from RFC 3493, combined with binary or. */
#define NI_NOFQDN       0x0001
#define NI_NUMERICHOST  0x0002
#define NI_NAMEREQD     0x0004
#define NI_NUMERICSERV  0x0008
#define NI_DGRAM        0x0010

/*
 * Maximum length of hostnames and service names.  Our implementation doesn't
 * use these values, so they're taken from Linux.  They're provided just for
 * code that uses them to size buffers.
 */
#ifndef NI_MAXHOST
# define NI_MAXHOST     1025
#endif
#ifndef NI_MAXSERV
# define NI_MAXSERV     32
#endif

BEGIN_DECLS

/* Function prototypes. */
int getnameinfo(const struct sockaddr *sa, socklen_t salen,
                char *node, socklen_t nodelen,
                char *service, socklen_t servicelen, int flags)
    __attribute__((__visibility__("hidden")));

END_DECLS

#endif /* !HAVE_GETNAMEINFO */
#endif /* !PORTABLE_GETNAMEINFO_H */