global.cpp

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// Copyright (C) 2022+ GPL 3 and higher by Ingo Höft, <Ingo@Hoeft-online.de>
// Redistribution only with this Copyright remark. Last modified: 2025-05-04
#include <UPnPsdk/global.ipp>
#include <UPnPsdk/port_sock.hpp>
#include <iostream>
#include <string>
 
// strndup() is a GNU extension.
#ifndef HAVE_STRNDUP
char* strndup(const char* __string, size_t __n) {
    size_t strsize = strnlen(__string, __n);
    char* newstr = (char*)malloc(strsize + 1);
    if (newstr == NULL)
        return NULL;
 
    strncpy(newstr, __string, strsize);
    newstr[strsize] = 0;
 
    return newstr;
}
#endif
 
 
namespace UPnPsdk {
namespace {
 
#if defined(_MSC_VER) || defined(DOXYGEN_RUN)
class CWSAStartup {
  public:
    CWSAStartup() {
        // TRACE2(this, " Construct CWSAStartup")
        // Due to MSVC_WARN_4273, I will not use TRACE2() with this global
        // linkage
#ifdef UPnPsdk_WITH_TRACE
        std::cout << "TRACE[UPnPsdk/src/global.cpp:" << __LINE__ << "] " << this
                  << " Construct CWSAStartup\n";
#endif
        ::WSADATA wsaData;
        int rc = ::WSAStartup(MAKEWORD(2, 2), &wsaData);
        if (rc != 0) {
            std::string err_str = "UPnPsdk [" + std::string(__FUNCTION__) +
                                  "] FATAL MSG1003: Failed to initialize "
                                  "Windows Sockets, WSAStartup() returns (" +
                                  std::to_string(rc) + ") \"" +
                                  std::system_category().message(rc) + "\"\n";
            std::cerr << err_str;
            exit(EXIT_FAILURE);
        }
        /* Confirm that the WinSock DLL supports 2.2. Note that if the DLL
         * supports versions greater than 2.2 in addition to 2.2, it will still
         * return 2.2 in wVersion since that is the version we requested. */
        if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) {
            /* Tell the user that we could not find a usable WinSock DLL. */
            ::WSACleanup();
            std::string err_str =
                "UPnPsdk [" + std::string(__FUNCTION__) +
                "] FATAL MSG1131: Windows Sockets DLL must "
                "support version 2.2 but it has " +
                std::to_string(HIBYTE(wsaData.wVersion)) + "." +
                std::to_string(LOBYTE(wsaData.wVersion)) + "\n";
            std::cerr << err_str;
            exit(EXIT_FAILURE);
        }
    }
 
    // No copy constructor
    CWSAStartup(const CWSAStartup&) = delete;
    // No copy assignment operator
    CWSAStartup& operator=(CWSAStartup) = delete;
 
    virtual ~CWSAStartup() {
        // TRACE2(this, " Destruct CWSAStartup")
        // Due to MSVC_WARN_4273, I will not use TRACE2() with this global
        // linkage
#ifdef UPnPsdk_WITH_TRACE
        // clang-format off
        std::cout << "TRACE[UPnPsdk/src/global.cpp:" << __LINE__ << "] " << this
                  << " Destruct CWSAStartup"
                  << "\n";
        // clang-format on
#endif
        ::WSACleanup();
    }
};
 
const CWSAStartup init_winsock;
#endif // _MSC_VER
 
} // anonymous namespace
 
 
// SUPPRESS_MSVC_WARN_4273_NEXT_LINE // don't do that
UPnPsdk_API bool g_dbug{false};
 
} // namespace UPnPsdk