NetUtil.h

/*  Copyright (C) 2003-2021 Free Electron Organization
    Any use of this software requires a license.  If a valid license
    was not distributed with this file, visit freeelectron.org. */

#ifndef __NETUTIL_H__
#define __NETUTIL_H__

#include "osheader.h"

namespace fe
{
namespace ext
{

class NetUtil
{
public:
    static NetUtil &Instance()
    {
        static NetUtil instance;
        return instance;
    }

    ~NetUtil()
    {
        Cleanup();
    }

    bool IsNetworkInit()
    {
#ifdef _WIN32
        SOCKET s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
        if (s == INVALID_SOCKET && WSAGetLastError() == WSANOTINITIALISED)
        {
            return false;
        }

        closesocket(s);
#endif
        return true;
    }

    int GetLastError()
    {
#ifdef _WIN32
        return WSAGetLastError();
#else
        return errno;
#endif
    }

protected:
    NetUtil() { Init(); }

    bool Init()
    {
#ifdef _WIN32
        WSADATA wsaData;
        WORD version = MAKEWORD(2, 2);

        if (WSAStartup(version, &wsaData) != 0)
        {
            feLog("winsock initialization error\n");
            return false;
        }
#endif
        return true;
    }

    void Cleanup()
    {
#ifdef _WIN32
        WSACleanup();
#endif
    }
};

} // namespace ext
} // namespace fe

#endif