lib/netdb.in.h

   1 /* Provide a netdb.h header file for systems lacking it (read: MinGW).
   2    Copyright (C) 2008-2011 Free Software Foundation, Inc.
   3    Written by Simon Josefsson.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU Lesser General Public License as published by
   7    the Free Software Foundation; either version 2, or (at your option)
   8    any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public License
  16    along with this program; if not, write to the Free Software Foundation,
  17    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 /* This file is supposed to be used on platforms that lack <netdb.h>.
  20    It is intended to provide definitions and prototypes needed by an
  21    application.  */
  22
  23 #ifndef _GL_NETDB_H
  24
  25 #if __GNUC__ >= 3
  26 @PRAGMA_SYSTEM_HEADER@
  27 #endif
  28 @PRAGMA_COLUMNS@
  29
  30 #if @HAVE_NETDB_H@
  31
  32 /* The include_next requires a split double-inclusion guard.  */
  33 # @INCLUDE_NEXT@ @NEXT_NETDB_H@
  34
  35 #endif
  36
  37 #ifndef _GL_NETDB_H
  38 #define _GL_NETDB_H
  39
  40 /* Get <netdb.h> definitions such as 'socklen_t' on IRIX 6.5 and OSF/1 4.0 and
  41    'struct hostent' on MinGW.  */
  42 #include <sys/socket.h>
  43
  44 /* The definition of _GL_ARG_NONNULL is copied here.  */
  45
  46 /* The definition of _GL_WARN_ON_USE is copied here.  */
  47
  48 /* Declarations for a platform that lacks <netdb.h>, or where it is
  49    incomplete.  */
  50
  51 #if @GNULIB_GETADDRINFO@
  52
  53 # if !@HAVE_STRUCT_ADDRINFO@
  54
  55 #  if !GNULIB_defined_struct_addrinfo
  56 /* Structure to contain information about address of a service provider.  */
  57 struct addrinfo
  58 {
  59   int ai_flags;                 /* Input flags.  */
  60   int ai_family;                /* Protocol family for socket.  */
  61   int ai_socktype;              /* Socket type.  */
  62   int ai_protocol;              /* Protocol for socket.  */
  63   socklen_t ai_addrlen;         /* Length of socket address.  */
  64   struct sockaddr *ai_addr;     /* Socket address for socket.  */
  65   char *ai_canonname;           /* Canonical name for service location.  */
  66   struct addrinfo *ai_next;     /* Pointer to next in list.  */
  67 };
  68 #   define GNULIB_defined_struct_addrinfo 1
  69 #  endif
  70 # endif
  71
  72 /* Possible values for `ai_flags' field in `addrinfo' structure.  */
  73 # ifndef AI_PASSIVE
  74 #  define AI_PASSIVE    0x0001  /* Socket address is intended for `bind'.  */
  75 # endif
  76 # ifndef AI_CANONNAME
  77 #  define AI_CANONNAME  0x0002  /* Request for canonical name.  */
  78 # endif
  79 # ifndef AI_NUMERICSERV
  80 #  define AI_NUMERICSERV        0x0400  /* Don't use name resolution.  */
  81 # endif
  82
  83 # if 0
  84 #  define AI_NUMERICHOST        0x0004  /* Don't use name resolution.  */
  85 # endif
  86
  87 /* These symbolic constants are required to be present by POSIX, but
  88    our getaddrinfo replacement doesn't use them (yet).  Setting them
  89    to 0 on systems that doesn't have them avoids causing problems for
  90    system getaddrinfo implementations that would be confused by
  91    unknown values.  */
  92 # ifndef AI_V4MAPPED
  93 #  define AI_V4MAPPED    0 /* 0x0008: IPv4 mapped addresses are acceptable.  */
  94 # endif
  95 # ifndef AI_ALL
  96 #  define AI_ALL         0 /* 0x0010: Return IPv4 mapped and IPv6 addresses. */
  97 # endif
  98 # ifndef AI_ADDRCONFIG
  99 #  define AI_ADDRCONFIG  0 /* 0x0020: Use configuration of this host to choose
 100                                       returned address type.  */
 101 # endif
 102
 103 /* Error values for `getaddrinfo' function.  */
 104 # ifndef EAI_BADFLAGS
 105 #  define EAI_BADFLAGS    -1    /* Invalid value for `ai_flags' field.  */
 106 #  define EAI_NONAME      -2    /* NAME or SERVICE is unknown.  */
 107 #  define EAI_AGAIN       -3    /* Temporary failure in name resolution.  */
 108 #  define EAI_FAIL        -4    /* Non-recoverable failure in name res.  */
 109 #  define EAI_NODATA      -5    /* No address associated with NAME.  */
 110 #  define EAI_FAMILY      -6    /* `ai_family' not supported.  */
 111 #  define EAI_SOCKTYPE    -7    /* `ai_socktype' not supported.  */
 112 #  define EAI_SERVICE     -8    /* SERVICE not supported for `ai_socktype'.  */
 113 #  define EAI_MEMORY      -10   /* Memory allocation failure.  */
 114 # endif
 115
 116 /* Since EAI_NODATA is deprecated by RFC3493, some systems (at least
 117    FreeBSD, which does define EAI_BADFLAGS) have removed the definition
 118    in favor of EAI_NONAME.  */
 119 # if !defined EAI_NODATA && defined EAI_NONAME
 120 #  define EAI_NODATA EAI_NONAME
 121 # endif
 122
 123 # ifndef EAI_OVERFLOW
 124 /* Not defined on mingw32 and Haiku. */
 125 #  define EAI_OVERFLOW    -12   /* Argument buffer overflow.  */
 126 # endif
 127 # ifndef EAI_ADDRFAMILY
 128 /* Not defined on mingw32. */
 129 #  define EAI_ADDRFAMILY  -9    /* Address family for NAME not supported.  */
 130 # endif
 131 # ifndef EAI_SYSTEM
 132 /* Not defined on mingw32. */
 133 #  define EAI_SYSTEM      -11   /* System error returned in `errno'.  */
 134 # endif
 135
 136 # if 0
 137 /* The commented out definitions below are not yet implemented in the
 138    GNULIB getaddrinfo() replacement, so are not yet needed.
 139
 140    If they are restored, be sure to protect the definitions with #ifndef.  */
 141 #  ifndef EAI_INPROGRESS
 142 #   define EAI_INPROGRESS       -100    /* Processing request in progress.  */
 143 #   define EAI_CANCELED         -101    /* Request canceled.  */
 144 #   define EAI_NOTCANCELED      -102    /* Request not canceled.  */
 145 #   define EAI_ALLDONE          -103    /* All requests done.  */
 146 #   define EAI_INTR             -104    /* Interrupted by a signal.  */
 147 #   define EAI_IDN_ENCODE       -105    /* IDN encoding failed.  */
 148 #  endif
 149 # endif
 150
 151 # if !@HAVE_DECL_GETADDRINFO@
 152 /* Translate name of a service location and/or a service name to set of
 153    socket addresses.
 154    For more details, see the POSIX:2001 specification
 155    <http://www.opengroup.org/susv3xsh/getaddrinfo.html>.  */
 156 extern int getaddrinfo (const char *restrict nodename,
 157                         const char *restrict servname,
 158                         const struct addrinfo *restrict hints,
 159                         struct addrinfo **restrict res)
 160      _GL_ARG_NONNULL ((4));
 161 # endif
 162
 163 # if !@HAVE_DECL_FREEADDRINFO@
 164 /* Free `addrinfo' structure AI including associated storage.
 165    For more details, see the POSIX:2001 specification
 166    <http://www.opengroup.org/susv3xsh/getaddrinfo.html>.  */
 167 extern void freeaddrinfo (struct addrinfo *ai) _GL_ARG_NONNULL ((1));
 168 # endif
 169
 170 # if !@HAVE_DECL_GAI_STRERROR@
 171 /* Convert error return from getaddrinfo() to a string.
 172    For more details, see the POSIX:2001 specification
 173    <http://www.opengroup.org/susv3xsh/gai_strerror.html>.  */
 174 extern const char *gai_strerror (int ecode);
 175 # endif
 176
 177 # if !@HAVE_DECL_GETNAMEINFO@
 178 /* Convert socket address to printable node and service names.
 179    For more details, see the POSIX:2001 specification
 180    <http://www.opengroup.org/susv3xsh/getnameinfo.html>.  */
 181 extern int getnameinfo (const struct sockaddr *restrict sa, socklen_t salen,
 182                         char *restrict node, socklen_t nodelen,
 183                         char *restrict service, socklen_t servicelen,
 184                         int flags)
 185      _GL_ARG_NONNULL ((1));
 186 # endif
 187
 188 /* Possible flags for getnameinfo.  */
 189 # ifndef NI_NUMERICHOST
 190 #  define NI_NUMERICHOST 1
 191 # endif
 192 # ifndef NI_NUMERICSERV
 193 #  define NI_NUMERICSERV 2
 194 # endif
 195
 196 #elif defined GNULIB_POSIXCHECK
 197
 198 # undef getaddrinfo
 199 # if HAVE_RAW_DECL_GETADDRINFO
 200 _GL_WARN_ON_USE (getaddrinfo, "getaddrinfo is unportable - "
 201                  "use gnulib module getaddrinfo for portability");
 202 # endif
 203
 204 # undef freeaddrinfo
 205 # if HAVE_RAW_DECL_FREEADDRINFO
 206 _GL_WARN_ON_USE (freeaddrinfo, "freeaddrinfo is unportable - "
 207                  "use gnulib module getaddrinfo for portability");
 208 # endif
 209
 210 # undef gai_strerror
 211 # if HAVE_RAW_DECL_GAI_STRERROR
 212 _GL_WARN_ON_USE (gai_strerror, "gai_strerror is unportable - "
 213                  "use gnulib module getaddrinfo for portability");
 214 # endif
 215
 216 # undef getnameinfo
 217 # if HAVE_RAW_DECL_GETNAMEINFO
 218 _GL_WARN_ON_USE (getnameinfo, "getnameinfo is unportable - "
 219                  "use gnulib module getaddrinfo for portability");
 220 # endif
 221
 222 #endif
 223
 224 #endif /* _GL_NETDB_H */
 225 #endif /* _GL_NETDB_H */