CommonSocket.cpp

/*
 * CommonSocket.cpp
 * This file is part of VallauriSoft
 *
 * Copyright (C) 2012 - Comina Francesco
 *
 * VallauriSoft is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * VallauriSoft is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with VallauriSoft; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA  02110-1301  USA
 */

#ifndef _COMMON_SOCKET_CPP_

#define _COMMON_SOCKET_CPP_

#include "Socket.hpp"

namespace Socket
{
#ifdef WINDOWS
        unsigned int Socket::_num_sockets = 0;
#endif

    void CommonSocket::_socket(void)
    {
#ifdef WINDOWS
        this->_num_sockets++;
        if (this->_num_sockets == 1)
        {
            WSADATA wsaData;
            if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
                throw SocketException("[constructor] Cannot initialize socket environment");
        }
#endif
    }

    CommonSocket::CommonSocket(void)
    {
        this->_socket();
    }

    CommonSocket::CommonSocket(int socket_type)
    {
        this->_socket();

        this->_socket_type = socket_type;
        this->_opened = false;
        this->_binded = false;
        this->open();
    }

    CommonSocket::~CommonSocket(void)
    {
#ifdef WINDOWS
        this->_num_sockets--;
        if (this->_num_sockets == 0)
            WSACleanup();
#endif
    }

    void CommonSocket::open(void)
    {
        if (!this->_opened)
        {
            if ((this->_socket_id = socket(AF_INET, this->_socket_type, 0)) == -1)
                throw SocketException("[open] Cannot create socket");
            this->_opened = true;
            this->_binded = false;
        }
    }

    void CommonSocket::close(void)
    {
        if (this->_opened)
#ifdef WINDOWS
            closesocket(this->_socket_id);
#else
            shutdown(this->_socket_id, SHUT_RDWR);
#endif

        this->_opened = false;
        this->_binded = false;
    }
    
    void CommonSocket::listen_on_port(Port port)
    {
        if (this->_binded) throw SocketException("[listen_on_port] Socket already binded to a port, close the socket before to re-bind");

        if (!this->_opened) this->open();

        Address address(port);

        if (bind(this->_socket_id, (struct sockaddr*)&address, sizeof(struct sockaddr)) == -1)
        {
            stringstream error;
            error << "[listen_on_port] with [port=" << port << "] Cannot bind socket";
            throw SocketException(error.str());
        }

        this->_binded = true;
    }
}

#endif