socket_winsock.inl

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/** @file
 *  @author Bram de Greve (bram@cocamware.com)
 *  @author Tom De Muer (tom@cocamware.com)
 *
 *  *** BEGIN LICENSE INFORMATION ***
 *  
 *  The contents of this file are subject to the Common Public Attribution License 
 *  Version 1.0 (the "License"); you may not use this file except in compliance with 
 *  the License. You may obtain a copy of the License at 
 *  http://lass.sourceforge.net/cpal-license. The License is based on the 
 *  Mozilla Public License Version 1.1 but Sections 14 and 15 have been added to cover 
 *  use of software over a computer network and provide for limited attribution for 
 *  the Original Developer. In addition, Exhibit A has been modified to be consistent 
 *  with Exhibit B.
 *  
 *  Software distributed under the License is distributed on an "AS IS" basis, WITHOUT 
 *  WARRANTY OF ANY KIND, either express or implied. See the License for the specific 
 *  language governing rights and limitations under the License.
 *  
 *  The Original Code is LASS - Library of Assembled Shared Sources.
 *  
 *  The Initial Developer of the Original Code is Bram de Greve and Tom De Muer.
 *  The Original Developer is the Initial Developer.
 *  
 *  All portions of the code written by the Initial Developer are:
 *  Copyright (C) 2004-2024 the Initial Developer.
 *  All Rights Reserved.
 *  
 *  Contributor(s):
 *
 *  Alternatively, the contents of this file may be used under the terms of the 
 *  GNU General Public License Version 2 or later (the GPL), in which case the 
 *  provisions of GPL are applicable instead of those above.  If you wish to allow use
 *  of your version of this file only under the terms of the GPL and not to allow 
 *  others to use your version of this file under the CPAL, indicate your decision by 
 *  deleting the provisions above and replace them with the notice and other 
 *  provisions required by the GPL License. If you do not delete the provisions above,
 *  a recipient may use your version of this file under either the CPAL or the GPL.
 *  
 *  *** END LICENSE INFORMATION ***
 */
 
#include "../io_common.h"
#include "../socket.h"
#include "../../num/num_traits.h"
#include <winsock.h>
 
#if LASS_PLATFORM_TYPE == LASS_PLATFORM_TYPE_WIN32
#   pragma comment(lib, "ws2_32.lib")
#endif
 
namespace lass
{
namespace io
{
namespace impl
{
 
class SocketImpl: public util::NonCopyable
{
public:
 
    typedef Socket::TPort TPort;
 
    SocketImpl():
        socket_(INVALID_SOCKET)
    {
        WSADATA wsaData;
        if (::WSAStartup(0x0202, &wsaData) != 0)
        {
            LASS_THROW_EX(SocketError, "Failed to startup Windows Socket API.");
        }
        if (wsaData.wVersion != 0x0202)
        {
            ::WSACleanup();
            LASS_THROW_EX(SocketError, "Windows Socket API is not version 2.2.");
        }
    }
 
    ~SocketImpl()
    {
        try
        {
            closeSocket();
        }
        catch (const std::exception& error)
        {
            std::cerr << "[LASS RUN MSG] WARNING: closeSocket() failed: " << error.what();
        }
        [[maybe_unused]] const int err = ::WSACleanup();
        LASS_ASSERT(err == 0);
    }
 
    void bind(const std::string& address, TPort port)
    {
        openSocket();
 
        SOCKADDR_IN addr;
        addr.sin_family = AF_INET;
        addr.sin_addr.s_addr = address.empty() ? ::htonl(INADDR_ANY) : ::inet_addr(address.c_str());
        addr.sin_port = ::htons(port);
 
        if (::bind(socket_, (LPSOCKADDR)&addr, sizeof(addr)) != 0)
        {
            LASS_THROW_EX(SocketError, "Failed to bind socket to port " << port);
        }
    }
 
    void listen() const
    {
        LASS_ASSERT(socket_ != INVALID_SOCKET);
        ::listen(socket_, SOMAXCONN);
    }
 
    void accept(SocketImpl* connection) const
    {
        LASS_ASSERT(socket_ != INVALID_SOCKET);
        SOCKET conn = ::accept(socket_, 0, 0);
        if (conn == INVALID_SOCKET)
        {
            LASS_THROW_EX(SocketError, "Failed to accept connection");
        }
        LASS_ASSERT(connection);
        connection->socket_ = conn;
    }
 
    void connect(const std::string& address, TPort port)
    {
        openSocket();
 
        SOCKADDR_IN dest;
        dest.sin_family = AF_INET;
        dest.sin_addr.s_addr = ::inet_addr(address.c_str());
        dest.sin_port = ::htons(port);
        const int ret = ::connect(socket_, reinterpret_cast<SOCKADDR*>(&dest), sizeof(dest));
        if (ret == SOCKET_ERROR)
        {
            LASS_THROW_EX(SocketError, "could not connect " << address << ":" << port);
        }
    }
 
    std::string address() const
    {
        SOCKADDR_IN addr;
        addr.sin_family = AF_INET;
        int size = sizeof(addr);
        if (::getsockname(socket_, (LPSOCKADDR)&addr, &size) != 0)
        {
            LASS_THROW_EX(SocketError, "Failed to retrieve address");
        }
        return ::inet_ntoa(addr.sin_addr);
    }
 
    TPort port() const
    {
        SOCKADDR_IN addr;
        addr.sin_family = AF_INET;
        int size = sizeof(addr);
        if (::getsockname(socket_, (LPSOCKADDR)&addr, &size) != 0)
        {
            LASS_THROW_EX(SocketError, "Failed to retrieve port number");
        }
        return ::ntohs(addr.sin_port);
    }
 
    int send(const void* begin, int length) const
    {
        LASS_ASSERT(socket_ != INVALID_SOCKET);
        const int ret = ::send(socket_, static_cast<const char*>(begin), length, 0);
        if (ret == SOCKET_ERROR)
        {
            LASS_THROW_EX(SocketError, "Failure to send data: " << WSAGetLastError());
        }
        LASS_ASSERT(ret >= 0);
        return ret;
    }
 
    int receive(void* begin, int length) const
    {
        const int ret = ::recv(socket_, static_cast<char*>(begin), length, 0);
        if (ret == SOCKET_ERROR)
        {
            LASS_THROW_EX(SocketError, "Failure to receive data: " << WSAGetLastError());
        }
        LASS_ASSERT(ret >= 0);
        return ret;
    }
 
    int sizeSendBuffer() const
    {
        LASS_ASSERT(socket_ != INVALID_SOCKET);
        int size;
        int optlen = sizeof(size);
        const int ret = ::getsockopt(socket_, SOL_SOCKET, SO_SNDBUF, reinterpret_cast<char*>(&size), &optlen);
        if (ret == SOCKET_ERROR || optlen != sizeof(size))
        {
            LASS_THROW_EX(SocketError, "failed to query send buffer size");
        }
        return size;
    }
 
    void openSocket()
    {
        if (socket_ != INVALID_SOCKET)
        {
            return;
        }
        socket_ = ::socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
        if (socket_ == INVALID_SOCKET)
        {
            LASS_THROW_EX(SocketError, "Failed to create socket.");
        }
    }
    void closeSocket()
    {
        if (socket_ == INVALID_SOCKET)
        {
            return;
        }
        const int err = ::closesocket(socket_);
        if (err != 0)
        {
            LASS_THROW_EX(SocketError, "Failed to close socket");
        } 
        socket_ = INVALID_SOCKET;
    }
 
private:
 
    SOCKET socket_;
};
 
}
}
}
 
// EOF