/*-------------------------------------------------------------------------
 *
 * getaddrinfo.h
 *	  Support getaddrinfo() on platforms that don't have it.
 *
 *
 * Note: we use our own routines on platforms that don't HAVE_STRUCT_ADDRINFO,
 * whether or not the library routine getaddrinfo() can be found.  This
 * policy is needed because on some platforms a manually installed libbind.a
 * may provide getaddrinfo(), yet the system headers may not provide the
 * struct definitions needed to call it.  To avoid conflict with the libbind
 * definition in such cases, we rename our routines to pg_xxx() via macros.
 *
 * This code will also work on platforms where struct addrinfo is defined
 * in the system headers but no getaddrinfo() can be located.
 *
 * Copyright (c) 2003, PostgreSQL Global Development Group
 *
 * $Id: getaddrinfo.h,v 1.2 2003/04/02 00:49:28 tgl Exp $
 *
 *-------------------------------------------------------------------------
 */
#ifndef GETADDRINFO_H
#define GETADDRINFO_H

#include <sys/socket.h>
#include <netdb.h>


#ifndef HAVE_STRUCT_ADDRINFO

struct addrinfo {
	int     ai_flags;
	int     ai_family;
	int     ai_socktype;
	int     ai_protocol;
	size_t  ai_addrlen;
	struct sockaddr *ai_addr;
	char   *ai_canonname;
	struct addrinfo *ai_next;
};

#define EAI_BADFLAGS	-1
#define EAI_NONAME		-2
#define EAI_AGAIN		-3
#define EAI_FAIL		-4
#define EAI_NODATA		-5
#define EAI_FAMILY		-6
#define EAI_SOCKTYPE	-7
#define EAI_SERVICE		-8
#define EAI_ADDRFAMILY	-9
#define EAI_MEMORY		-10
#define EAI_SYSTEM		-11

#define AI_PASSIVE		0x0001
#define AI_NUMERICHOST	0x0004

#endif /* HAVE_STRUCT_ADDRINFO */


#ifndef HAVE_GETADDRINFO

/* Rename private copies per comments above */
#ifdef getaddrinfo
#undef getaddrinfo
#endif
#define getaddrinfo pg_getaddrinfo

#ifdef freeaddrinfo
#undef freeaddrinfo
#endif
#define freeaddrinfo pg_freeaddrinfo

#ifdef gai_strerror
#undef gai_strerror
#endif
#define gai_strerror pg_gai_strerror

extern int getaddrinfo(const char *node, const char *service,
					   const struct addrinfo *hints, struct addrinfo **res);
extern void freeaddrinfo(struct addrinfo *res);
extern const char *gai_strerror(int errcode);

#endif /* HAVE_GETADDRINFO */

#endif /* GETADDRINFO_H */