src/libpq/include/getaddrinfo.h

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/*-------------------------------------------------------------------------
 *
 * 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) 2003-2005, PostgreSQL Global Development Group
 *
 * $PostgreSQL: pgsql/src/include/getaddrinfo.h,v 1.17.2.1 2005/12/08 17:52:20 momjian Exp $
 *
 *-------------------------------------------------------------------------
 */
#ifndef GETADDRINFO_H
#define GETADDRINFO_H

#ifndef WIN32_CLIENT_ONLY
#include <sys/socket.h>
#include <netdb.h>
#endif


/* Various macros that ought to be in <netdb.h>, but might not be */

#ifndef EAI_FAIL
#ifndef WIN32
#define EAI_BADFLAGS    (-1)
#define EAI_NONAME              (-2)
#define EAI_AGAIN               (-3)
#define EAI_FAIL                (-4)
#define EAI_FAMILY              (-6)
#define EAI_SOCKTYPE    (-7)
#define EAI_SERVICE             (-8)
#define EAI_MEMORY              (-10)
#define EAI_SYSTEM              (-11)
#else                                                   /* WIN32 */
#if defined(WIN32_CLIENT_ONLY)
#define WSA_NOT_ENOUGH_MEMORY   (WSAENOBUFS)
#define WSATYPE_NOT_FOUND       (WSABASEERR+109)
#endif
#define EAI_AGAIN               WSATRY_AGAIN
#define EAI_BADFLAGS    WSAEINVAL
#define EAI_FAIL                WSANO_RECOVERY
#define EAI_FAMILY              WSAEAFNOSUPPORT
#define EAI_MEMORY              WSA_NOT_ENOUGH_MEMORY
#define EAI_NODATA              WSANO_DATA
#define EAI_NONAME              WSAHOST_NOT_FOUND
#define EAI_SERVICE             WSATYPE_NOT_FOUND
#define EAI_SOCKTYPE    WSAESOCKTNOSUPPORT
#endif   /* !WIN32 */
#endif   /* !EAI_FAIL */

#ifndef AI_PASSIVE
#define AI_PASSIVE              0x0001
#endif

#ifndef AI_NUMERICHOST
/*
 * some platforms don't support AI_NUMERICHOST; define as zero if using
 * the system version of getaddrinfo...
 */
#if defined(HAVE_STRUCT_ADDRINFO) && defined(HAVE_GETADDRINFO)
#define AI_NUMERICHOST  0
#else
#define AI_NUMERICHOST  0x0004
#endif
#endif

#ifndef NI_NUMERICHOST
#define NI_NUMERICHOST  1
#endif
#ifndef NI_NUMERICSERV
#define NI_NUMERICSERV  2
#endif

#ifndef NI_MAXHOST
#define NI_MAXHOST      1025
#endif
#ifndef NI_MAXSERV
#define NI_MAXSERV      32
#endif


#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;
};
#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

#ifdef getnameinfo
#undef getnameinfo
#endif
#define getnameinfo pg_getnameinfo

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);
extern int getnameinfo(const struct sockaddr * sa, int salen,
                        char *node, int nodelen,
                        char *service, int servicelen, int flags);
#endif   /* HAVE_GETADDRINFO */

#endif   /* GETADDRINFO_H */