compat/getaddrinfo.h

   1 /*
   2  * Copyright (C) 1996-2023 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 #ifndef _getaddrinfo_h
  10 #define _getaddrinfo_h
  11
  12 /*
  13  *  Shamelessly duplicated from the fetchmail public sources
  14  *  for use by the Squid Project under GNU Public License.
  15  *
  16  * Update/Maintenance History:
  17  *
  18  *    15-Aug-2007 : Copied from fetchmail 6.3.8
  19  *          - added protection around library headers
  20  *
  21  *    16-Aug-2007 : Altered configure checks
  22  *                  Un-hacked slightly to use system gethostbyname()
  23  *
  24  *  Original License and code follows.
  25  */
  26
  27 /*
  28  *  This file is part of libESMTP, a library for submission of RFC 2822
  29  *  formatted electronic mail messages using the SMTP protocol described
  30  *  in RFC 2821.
  31  *
  32  *  Copyright (C) 2001,2002  Brian Stafford  <brian@stafford.uklinux.net>
  33  *
  34  *  This library is free software; you can redistribute it and/or
  35  *  modify it under the terms of the GNU Lesser General Public
  36  *  License as published by the Free Software Foundation; either
  37  *  version 2.1 of the License, or (at your option) any later version.
  38  *
  39  *  This library is distributed in the hope that it will be useful,
  40  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  41  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  42  *  Lesser General Public License for more details.
  43  *
  44  *  You should have received a copy of the GNU Lesser General Public
  45  *  License along with this library; if not, write to the Free Software
  46  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  47  */
  48
  49 /* Structure and prototypes taken from RFC 2553 */
  50
  51 /* These functions are provided by the OS */
  52 #if !HAVE_DECL_GETADDRINFO
  53
  54 #ifndef EAI_SYSTEM
  55 /* Not defined on mingw32. */
  56 #define EAI_SYSTEM     11  /* System error returned in `errno'.  */
  57 #endif
  58 #ifndef EAI_OVERFLOW
  59 /* Not defined on mingw32. */
  60 #define EAI_OVERFLOW   12 /* Argument buffer overflow.  */
  61 #endif
  62
  63 #ifndef IN_EXPERIMENTAL
  64 #define IN_EXPERIMENTAL(a)  \
  65      ((((long int) (a)) & 0xf0000000) == 0xf0000000)
  66 #endif
  67
  68 /* RFC 2553 / Posix resolver */
  69 SQUIDCEXTERN int xgetaddrinfo (const char *nodename, const char *servname,
  70                                const struct addrinfo *hints, struct addrinfo **res);
  71 #define getaddrinfo xgetaddrinfo
  72
  73 /* Free addrinfo structure and associated storage */
  74 SQUIDCEXTERN void xfreeaddrinfo (struct addrinfo *ai);
  75 #define freeaddrinfo    xfreeaddrinfo
  76
  77 /* Convert error return from getaddrinfo() to string */
  78 SQUIDCEXTERN const char *xgai_strerror (int code);
  79 #if !defined(gai_strerror)
  80 #define gai_strerror    xgai_strerror
  81 #endif
  82
  83 #endif /* HAVE_DECL_GETADDRINFO */
  84 #endif /* _getaddrinfo_h */
  85