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e_winsock.h revision 1.1.1.1 
      1 /*
      2  * Copyright 2022 The OpenSSL Project Authors. All Rights Reserved.
      3  *
      4  * Licensed under the Apache License 2.0 (the "License").  You may not use
      5  * this file except in compliance with the License.  You can obtain a copy
      6  * in the file LICENSE in the source distribution or at
      7  * https://www.openssl.org/source/license.html
      8  */
      9 
     10 #ifndef OSSL_E_WINSOCK_H
     11 # define OSSL_E_WINSOCK_H
     12 # pragma once
     13 
     14 # ifdef WINDOWS
     15 #  if !defined(_WIN32_WCE) && !defined(_WIN32_WINNT)
     16       /*
     17        * Defining _WIN32_WINNT here in e_winsock.h implies certain "discipline."
     18        * Most notably we ought to check for availability of each specific
     19        * routine that was introduced after denoted _WIN32_WINNT with
     20        * GetProcAddress(). Normally newer functions are masked with higher
     21        * _WIN32_WINNT in SDK headers. So that if you wish to use them in
     22        * some module, you'd need to override _WIN32_WINNT definition in
     23        * the target module in order to "reach for" prototypes, but replace
     24        * calls to new functions with indirect calls. Alternatively it
     25        * might be possible to achieve the goal by /DELAYLOAD-ing .DLLs
     26        * and check for current OS version instead.
     27        */
     28 #   define _WIN32_WINNT 0x0501
     29 #  endif
     30 #  if defined(_WIN32_WINNT) || defined(_WIN32_WCE)
     31       /*
     32        * Just like defining _WIN32_WINNT including winsock2.h implies
     33        * certain "discipline" for maintaining [broad] binary compatibility.
     34        * As long as structures are invariant among Winsock versions,
     35        * it's sufficient to check for specific Winsock2 API availability
     36        * at run-time [DSO_global_lookup is recommended]...
     37        */
     38 #   include <winsock2.h>
     39 #   include <ws2tcpip.h>
     40       /*
     41        * Clang-based C++Builder 10.3.3 toolchains cannot find C inline
     42        * definitions at link-time.  This header defines WspiapiLoad() as an
     43        * __inline function.  https://quality.embarcadero.com/browse/RSP-33806
     44        */
     45 #   if !defined(__BORLANDC__) || !defined(__clang__)
     46 #    include <wspiapi.h>
     47 #   endif
     48       /* yes, they have to be #included prior to <windows.h> */
     49 #  endif
     50 #  include <windows.h>
     51 # endif
     52 #endif /* !(OSSL_E_WINSOCK_H) */
     53