lib/addrinfo.h

   1 /*
   2 PostgreSQL Database Management System
   3 (formerly known as Postgres, then as Postgres95)
   4
   5 Portions Copyright (c) 1996-2005, The PostgreSQL Global Development Group
   6
   7 Portions Copyright (c) 1994, The Regents of the University of California
   8
   9 Permission to use, copy, modify, and distribute this software and its
  10 documentation for any purpose, without fee, and without a written agreement
  11 is hereby granted, provided that the above copyright notice and this paragraph
  12 and the following two paragraphs appear in all copies.
  13
  14 IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
  15 DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING
  16 LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION,
  17 EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
  18 SUCH DAMAGE.
  19
  20 THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
  21 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
  22 AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
  23 ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATIONS
  24 TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
  25
  26 */
  27
  28 /*-------------------------------------------------------------------------
  29  *
  30  * getaddrinfo.h
  31  *        Support getaddrinfo() on platforms that don't have it.
  32  *
  33  * Note: we use our own routines on platforms that don't HAVE_STRUCT_ADDRINFO,
  34  * whether or not the library routine getaddrinfo() can be found.  This
  35  * policy is needed because on some platforms a manually installed libbind.a
  36  * may provide getaddrinfo(), yet the system headers may not provide the
  37  * struct definitions needed to call it.  To avoid conflict with the libbind
  38  * definition in such cases, we rename our routines to pg_xxx() via macros.
  39  *
  40  * This code will also work on platforms where struct addrinfo is defined
  41  * in the system headers but no getaddrinfo() can be located.
  42  *
  43  * Copyright (c) 2003-2007, PostgreSQL Global Development Group
  44  *
  45  *-------------------------------------------------------------------------
  46  */
  47 #ifndef ADDRINFO_H
  48 #define ADDRINFO_H
  49
  50
  51 /* Various macros that ought to be in <netdb.h>, but might not be */
  52
  53 #ifndef EAI_FAIL
  54 #define EAI_BADFLAGS    (-1)
  55 #define EAI_NONAME              (-2)
  56 #define EAI_AGAIN               (-3)
  57 #define EAI_FAIL                (-4)
  58 #define EAI_FAMILY              (-6)
  59 #define EAI_SOCKTYPE    (-7)
  60 #define EAI_SERVICE             (-8)
  61 #define EAI_MEMORY              (-10)
  62 #define EAI_SYSTEM              (-11)
  63 #endif   /* !EAI_FAIL */
  64
  65 #ifndef AI_PASSIVE
  66 #define AI_PASSIVE              0x0001
  67 #endif
  68
  69 #ifndef AI_NUMERICHOST
  70 /*
  71  * some platforms don't support AI_NUMERICHOST; define as zero if using
  72  * the system version of getaddrinfo...
  73  */
  74 #if defined(HAVE_STRUCT_ADDRINFO) && defined(HAVE_GETADDRINFO)
  75 #define AI_NUMERICHOST  0
  76 #else
  77 #define AI_NUMERICHOST  0x0004
  78 #endif
  79 #endif
  80
  81 #ifndef AI_CANONNAME
  82 #if defined(HAVE_STRUCT_ADDRINFO) && defined(HAVE_GETADDRINFO)
  83 #define AI_CANONNAME 0
  84 #else
  85 #define AI_CANONNAME 0x0008
  86 #endif
  87 #endif
  88
  89 #ifndef AI_NUMERICSERV
  90 #if defined(HAVE_STRUCT_ADDRINFO) && defined(HAVE_GETADDRINFO)
  91 #define AI_NUMERICSERV 0
  92 #else
  93 #define AI_NUMERICSERV 0x0010
  94 #endif
  95 #endif
  96
  97 #ifndef NI_NUMERICHOST
  98 #define NI_NUMERICHOST  1
  99 #endif
 100
 101 #ifndef NI_NUMERICSERV
 102 #define NI_NUMERICSERV  2
 103 #endif
 104
 105 #ifndef NI_NOFQDN
 106 #define NI_NOFQDN       4
 107 #endif
 108
 109 #ifndef NI_NAMEREQD
 110 #define NI_NAMEREQD     8
 111 #endif
 112
 113 #ifndef NI_DGRAM
 114 #define NI_DGRAM        16
 115 #endif
 116
 117
 118 #ifndef NI_MAXHOST
 119 #define NI_MAXHOST      1025
 120 #endif
 121
 122 #ifndef NI_MAXSERV
 123 #define NI_MAXSERV      32
 124 #endif
 125
 126 #ifndef HAVE_STRUCT_ADDRINFO
 127 struct addrinfo
 128 {
 129         int                     ai_flags;
 130         int                     ai_family;
 131         int                     ai_socktype;
 132         int                     ai_protocol;
 133         size_t          ai_addrlen;
 134         struct sockaddr *ai_addr;
 135         char       *ai_canonname;
 136         struct addrinfo *ai_next;
 137 };
 138 #endif   /* !HAVE_STRUCT_ADDRINFO */
 139
 140 #ifndef HAVE_STRUCT_SOCKADDR_STORAGE
 141 struct sockaddr_storage {
 142         unsigned short ss_family;
 143         unsigned long ss_align;
 144         char ss_padding[128 - sizeof (unsigned long)];
 145 };
 146 #endif  /* !HAVE_STRUCT_SOCKADDR_STORAGE */
 147
 148 #ifndef HAVE_GETADDRINFO
 149
 150 /* Rename private copies per comments above */
 151 #ifdef getaddrinfo
 152 #undef getaddrinfo
 153 #endif
 154 #define getaddrinfo pg_getaddrinfo
 155
 156 #ifdef freeaddrinfo
 157 #undef freeaddrinfo
 158 #endif
 159 #define freeaddrinfo pg_freeaddrinfo
 160
 161 #ifdef gai_strerror
 162 #undef gai_strerror
 163 #endif
 164 #define gai_strerror pg_gai_strerror
 165
 166 #ifdef getnameinfo
 167 #undef getnameinfo
 168 #endif
 169 #define getnameinfo pg_getnameinfo
 170
 171 extern int getaddrinfo(const char *node, const char *service,
 172                         const struct addrinfo * hints, struct addrinfo ** res);
 173 extern void freeaddrinfo(struct addrinfo * res);
 174 extern const char *gai_strerror(int errcode);
 175 extern int getnameinfo(const struct sockaddr * sa, socklen_t salen,
 176                         char *node, size_t nodelen,
 177                         char *service, size_t servicelen, int flags);
 178 #endif   /* !HAVE_GETADDRINFO */
 179
 180 #endif   /* ADDRINFO_H */