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) 2003-2021, PostgreSQL Global Development Group
  17  *
  18  * src/include/getaddrinfo.h
  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 _MSC_VER
  44 #ifndef WSA_NOT_ENOUGH_MEMORY
  45 #define WSA_NOT_ENOUGH_MEMORY   (WSAENOBUFS)
  46 #endif
  47 #define WSATYPE_NOT_FOUND               (WSABASEERR+109)
  48 #endif
  49 #define EAI_AGAIN               WSATRY_AGAIN
  50 #define EAI_BADFLAGS    WSAEINVAL
  51 #define EAI_FAIL                WSANO_RECOVERY
  52 #define EAI_FAMILY              WSAEAFNOSUPPORT
  53 #define EAI_MEMORY              WSA_NOT_ENOUGH_MEMORY
  54 #define EAI_NODATA              WSANO_DATA
  55 #define EAI_NONAME              WSAHOST_NOT_FOUND
  56 #define EAI_SERVICE             WSATYPE_NOT_FOUND
  57 #define EAI_SOCKTYPE    WSAESOCKTNOSUPPORT
  58 #endif                                                  /* !WIN32 */
  59 #endif                                                  /* !EAI_FAIL */
  60
  61 #ifndef AI_PASSIVE
  62 #define AI_PASSIVE              0x0001
  63 #endif
  64
  65 #ifndef AI_NUMERICHOST
  66 /*
  67  * some platforms don't support AI_NUMERICHOST; define as zero if using
  68  * the system version of getaddrinfo...
  69  */
  70 #if defined(HAVE_STRUCT_ADDRINFO) && defined(HAVE_GETADDRINFO)
  71 #define AI_NUMERICHOST  0
  72 #else
  73 #define AI_NUMERICHOST  0x0004
  74 #endif
  75 #endif
  76
  77 #ifndef NI_NUMERICHOST
  78 #define NI_NUMERICHOST  1
  79 #endif
  80 #ifndef NI_NUMERICSERV
  81 #define NI_NUMERICSERV  2
  82 #endif
  83 #ifndef NI_NAMEREQD
  84 #define NI_NAMEREQD             4
  85 #endif
  86
  87 #ifndef NI_MAXHOST
  88 #define NI_MAXHOST      1025
  89 #endif
  90 #ifndef NI_MAXSERV
  91 #define NI_MAXSERV      32
  92 #endif
  93
  94
  95 #ifndef HAVE_STRUCT_ADDRINFO
  96
  97 #ifndef WIN32
  98 struct addrinfo
  99 {
 100         int                     ai_flags;
 101         int                     ai_family;
 102         int                     ai_socktype;
 103         int                     ai_protocol;
 104         size_t          ai_addrlen;
 105         struct sockaddr *ai_addr;
 106         char       *ai_canonname;
 107         struct addrinfo *ai_next;
 108 };
 109 #else
 110 /*
 111  *      The order of the structure elements on Win32 doesn't match the
 112  *      order specified in the standard, but we have to match it for
 113  *      IPv6 to work.
 114  */
 115 struct addrinfo
 116 {
 117         int                     ai_flags;
 118         int                     ai_family;
 119         int                     ai_socktype;
 120         int                     ai_protocol;
 121         size_t          ai_addrlen;
 122         char       *ai_canonname;
 123         struct sockaddr *ai_addr;
 124         struct addrinfo *ai_next;
 125 };
 126 #endif
 127 #endif                                                  /* HAVE_STRUCT_ADDRINFO */
 128
 129
 130 #ifndef HAVE_GETADDRINFO
 131
 132 /* Rename private copies per comments above */
 133 #ifdef getaddrinfo
 134 #undef getaddrinfo
 135 #endif
 136 #define getaddrinfo pg_getaddrinfo
 137
 138 #ifdef freeaddrinfo
 139 #undef freeaddrinfo
 140 #endif
 141 #define freeaddrinfo pg_freeaddrinfo
 142
 143 #ifdef gai_strerror
 144 #undef gai_strerror
 145 #endif
 146 #define gai_strerror pg_gai_strerror
 147
 148 #ifdef getnameinfo
 149 #undef getnameinfo
 150 #endif
 151 #define getnameinfo pg_getnameinfo
 152
 153 extern int      getaddrinfo(const char *node, const char *service,
 154                                                 const struct addrinfo *hints, struct addrinfo **res);
 155 extern void freeaddrinfo(struct addrinfo *res);
 156 extern const char *gai_strerror(int errcode);
 157 extern int      getnameinfo(const struct sockaddr *sa, int salen,
 158                                                 char *node, int nodelen,
 159                                                 char *service, int servicelen, int flags);
 160 #endif                                                  /* HAVE_GETADDRINFO */
 161
 162 #endif                                                  /* GETADDRINFO_H */