text: /*-------------------------------------------------------------------------
   *
   * 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) 2003-2010, PostgreSQL Global Development Group
   *
   * $PostgreSQL: pgsql/src/include/getaddrinfo.h,v 1.27 2010/01/02 16:58:00 momjian Exp $
   *
   *-------------------------------------------------------------------------
   */
  #ifndef GETADDRINFO_H
  #define GETADDRINFO_H
  
  #include <sys/socket.h>
  #include <netdb.h>
  
  
  /* 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 */
  #ifdef WIN32_ONLY_COMPILER
  #ifndef WSA_NOT_ENOUGH_MEMORY
  #define WSA_NOT_ENOUGH_MEMORY	(WSAENOBUFS)
  #endif
  #ifndef __BORLANDC__
  #define WSATYPE_NOT_FOUND		(WSABASEERR+109)
  #endif
  #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
  
  #ifndef WIN32
  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;
  };
  #else
  /*
   *	The order of the structure elements on Win32 doesn't match the
   *	order specified in the standard, but we have to match it for
   *	IPv6 to work.
   */
  struct addrinfo
  {
  	int			ai_flags;
  	int			ai_family;
  	int			ai_socktype;
  	int			ai_protocol;
  	size_t		ai_addrlen;
  	char	   *ai_canonname;
  	struct sockaddr *ai_addr;
  	struct addrinfo *ai_next;
  };
  #endif
  #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 */
  