src/include/getaddrinfo.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * getaddrinfo.h
   4  *        Support getaddrinfo() on platforms that don't have it.
   5  *
   6  * Note: we use our own routines on platforms that don't HAVE_STRUCT_ADDRINFO,
   7  * whether or not the library routine getaddrinfo() can be found.  This
   8  * policy is needed because on some platforms a manually installed libbind.a
   9  * may provide getaddrinfo(), yet the system headers may not provide the
  10  * struct definitions needed to call it.  To avoid conflict with the libbind
  11  * definition in such cases, we rename our routines to pg_xxx() via macros.
  12  *
  13  * This code will also work on platforms where struct addrinfo is defined
  14  * in the system headers but no getaddrinfo() can be located.
  15  *
  16  * Copyright (c) 2003-2008, PostgreSQL Global Development Group
  17  *
  18  * $PostgreSQL$
  19  *
  20  *-------------------------------------------------------------------------
  21  */
  22 #ifndef GETADDRINFO_H
  23 #define GETADDRINFO_H
  24
  25 #include <sys/socket.h>
  26 #include <netdb.h>
  27
  28
  29 /* Various macros that ought to be in <netdb.h>, but might not be */
  30
  31 #ifndef EAI_FAIL
  32 #ifndef WIN32
  33 #define EAI_BADFLAGS    (-1)
  34 #define EAI_NONAME              (-2)
  35 #define EAI_AGAIN               (-3)
  36 #define EAI_FAIL                (-4)
  37 #define EAI_FAMILY              (-6)
  38 #define EAI_SOCKTYPE    (-7)
  39 #define EAI_SERVICE             (-8)
  40 #define EAI_MEMORY              (-10)
  41 #define EAI_SYSTEM              (-11)
  42 #else                                                   /* WIN32 */
  43 #ifdef WIN32_ONLY_COMPILER
  44 #ifndef WSA_NOT_ENOUGH_MEMORY
  45 #define WSA_NOT_ENOUGH_MEMORY   (WSAENOBUFS)
  46 #endif
  47 #ifndef __BORLANDC__
  48 #define WSATYPE_NOT_FOUND               (WSABASEERR+109)
  49 #endif
  50 #endif
  51 #define EAI_AGAIN               WSATRY_AGAIN
  52 #define EAI_BADFLAGS    WSAEINVAL
  53 #define EAI_FAIL                WSANO_RECOVERY
  54 #define EAI_FAMILY              WSAEAFNOSUPPORT
  55 #define EAI_MEMORY              WSA_NOT_ENOUGH_MEMORY
  56 #define EAI_NODATA              WSANO_DATA
  57 #define EAI_NONAME              WSAHOST_NOT_FOUND
  58 #define EAI_SERVICE             WSATYPE_NOT_FOUND
  59 #define EAI_SOCKTYPE    WSAESOCKTNOSUPPORT
  60 #endif   /* !WIN32 */
  61 #endif   /* !EAI_FAIL */
  62
  63 #ifndef AI_PASSIVE
  64 #define AI_PASSIVE              0x0001
  65 #endif
  66
  67 #ifndef AI_NUMERICHOST
  68 /*
  69  * some platforms don't support AI_NUMERICHOST; define as zero if using
  70  * the system version of getaddrinfo...
  71  */
  72 #if defined(HAVE_STRUCT_ADDRINFO) && defined(HAVE_GETADDRINFO)
  73 #define AI_NUMERICHOST  0
  74 #else
  75 #define AI_NUMERICHOST  0x0004
  76 #endif
  77 #endif
  78
  79 #ifndef NI_NUMERICHOST
  80 #define NI_NUMERICHOST  1
  81 #endif
  82 #ifndef NI_NUMERICSERV
  83 #define NI_NUMERICSERV  2
  84 #endif
  85
  86 #ifndef NI_MAXHOST
  87 #define NI_MAXHOST      1025
  88 #endif
  89 #ifndef NI_MAXSERV
  90 #define NI_MAXSERV      32
  91 #endif
  92
  93
  94 #ifndef HAVE_STRUCT_ADDRINFO
  95
  96 #ifndef WIN32
  97 struct addrinfo
  98 {
  99         int                     ai_flags;
 100         int                     ai_family;
 101         int                     ai_socktype;
 102         int                     ai_protocol;
 103         size_t          ai_addrlen;
 104         struct sockaddr *ai_addr;
 105         char       *ai_canonname;
 106         struct addrinfo *ai_next;
 107 };
 108 #else
 109 /*
 110  *      The order of the structure elements on Win32 doesn't match the
 111  *      order specified in the standard, but we have to match it for
 112  *      IPv6 to work.
 113  */
 114 struct addrinfo
 115 {
 116         int                     ai_flags;
 117         int                     ai_family;
 118         int                     ai_socktype;
 119         int                     ai_protocol;
 120         size_t          ai_addrlen;
 121         char       *ai_canonname;
 122         struct sockaddr *ai_addr;
 123         struct addrinfo *ai_next;
 124 };
 125 #endif
 126 #endif   /* HAVE_STRUCT_ADDRINFO */
 127
 128
 129 #ifndef HAVE_GETADDRINFO
 130
 131 /* Rename private copies per comments above */
 132 #ifdef getaddrinfo
 133 #undef getaddrinfo
 134 #endif
 135 #define getaddrinfo pg_getaddrinfo
 136
 137 #ifdef freeaddrinfo
 138 #undef freeaddrinfo
 139 #endif
 140 #define freeaddrinfo pg_freeaddrinfo
 141
 142 #ifdef gai_strerror
 143 #undef gai_strerror
 144 #endif
 145 #define gai_strerror pg_gai_strerror
 146
 147 #ifdef getnameinfo
 148 #undef getnameinfo
 149 #endif
 150 #define getnameinfo pg_getnameinfo
 151
 152 extern int getaddrinfo(const char *node, const char *service,
 153                         const struct addrinfo * hints, struct addrinfo ** res);
 154 extern void freeaddrinfo(struct addrinfo * res);
 155 extern const char *gai_strerror(int errcode);
 156 extern int getnameinfo(const struct sockaddr * sa, int salen,
 157                         char *node, int nodelen,
 158                         char *service, int servicelen, int flags);
 159 #endif   /* HAVE_GETADDRINFO */
 160
 161 #endif   /* GETADDRINFO_H */