hxopwaveudpsock.cpp

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/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: hxopwaveudpsock.cpp,v 1.4.28.1 2004/07/09 02:08:45 hubbe Exp $
 * 
 * * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
 * 
 * The contents of this file, and the files included with this file,
 * are subject to the current version of the RealNetworks Public
 * Source License (the "RPSL") available at
 * http://www.helixcommunity.org/content/rpsl unless you have licensed
 * the file under the current version of the RealNetworks Community
 * Source License (the "RCSL") available at
 * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
 * will apply. You may also obtain the license terms directly from
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 * to this file, the RCSL.  Please see the applicable RPSL or RCSL for
 * the rights, obligations and limitations governing use of the
 * contents of the file.
 * 
 * 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 the GPL are applicable
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 * use your version of this file under the terms of any one of the
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 * 
 * This file is part of the Helix DNA Technology. RealNetworks is the
 * developer of the Original Code and owns the copyrights in the
 * portions it created.
 * 
 * This file, and the files included with this file, is distributed
 * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
 * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS
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 * ENJOYMENT OR NON-INFRINGEMENT.
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 * ***** END LICENSE BLOCK ***** */

#include "hxopwaveudpsock.h"
#include "debug.h"
#include "hxassert.h"
#include "ihxpckts.h"
#include "smartptr.h"

#define D_UDPSOCKET 0x10000000

HXOpwaveUDPSocket::HXOpwaveUDPSocket(IHXCommonClassFactory* pCCF)
                                    : OpSocket(kUDP)
                                    , m_lRefCount(0)
                                    , m_pResponse(0)
                                    , m_pCCF(0)
                                    , m_state(udpNotInitialized)
                                    , m_ulRemoteAddr(0)
                                    , m_nRemotePort(0)
                                    , m_nLocalPort(0)
                                    , m_ulLocalAddr(0)
                                    , m_ulReadSize(0)
                                    , m_pWriteBuffer(NULL)
                                    , m_ulBytesLeftToWrite(0)
                                    , m_pReadBuffer(NULL)
{
    
    if (pCCF)
    {
        m_pCCF = pCCF;
        m_pCCF->AddRef();
    }
}


HXOpwaveUDPSocket::~HXOpwaveUDPSocket()
{
    
    DPRINTF(D_UDPSOCKET, ("HXOpwaveUDPSocket::~HXOpwaveUDPSocket()\n"));
    
    CloseSocket(HXR_OK);
    HX_RELEASE(m_pResponse);
    HX_RELEASE(m_pCCF);
}



/*
*  IUnknown methods
*/
STDMETHODIMP
HXOpwaveUDPSocket::QueryInterface(THIS_
                                  REFIID riid,
                                  void** ppvObj)
{
    
    DPRINTF(D_UDPSOCKET, ("HXOpwaveUDPSocket::QueryInterface()\n"));
    
    if (IsEqualIID(riid, IID_IHXUDPSocket))
    {
        
        AddRef();
        *ppvObj = (IHXUDPSocket*)this;
        return HXR_OK;
    }
    else if (IsEqualIID(riid, IID_IHXSetSocketOption))
    {
        AddRef();
        *ppvObj = (IHXSetSocketOption*)this;
        return HXR_OK;
    }    
    else if (IsEqualIID(riid, IID_IUnknown))
    {
        AddRef();
        *ppvObj = (IUnknown*)(IHXUDPSocket*)this;
        return HXR_OK;
    }
    
    *ppvObj = NULL;
    return HXR_NOINTERFACE;
}


STDMETHODIMP_(ULONG32)
HXOpwaveUDPSocket::AddRef(THIS)
{
    return InterlockedIncrement(&m_lRefCount);
}



STDMETHODIMP_(ULONG32)
HXOpwaveUDPSocket::Release(THIS)
{
    if (InterlockedDecrement(&m_lRefCount) > 0)
    {
        return m_lRefCount;
    }
    
    delete this;
    return 0;
}

/*
*	IHXUDPSocket methods
*
*  Network addresses and ports are in native byte order
*  
*/
STDMETHODIMP
HXOpwaveUDPSocket::Init(THIS_
                        ULONG32			ulAddr,
                        UINT16			nPort,
                        IHXUDPResponse*	pUDPResponse)
{
    DPRINTF(D_UDPSOCKET, ("HXOpwaveUDPSocket::Init(%08lx, %u)\n",
        ulAddr, nPort));
    
    HX_RESULT res = HXR_OK;

    if (m_state != udpNotInitialized)
    {
        return res;
    }
    if (pUDPResponse)
    {
        HX_RELEASE(m_pResponse);
        m_pResponse = pUDPResponse;
        m_pResponse->AddRef();
    }
    m_ulRemoteAddr = ulAddr;
    m_nRemotePort = nPort;
    
    if (m_ulRemoteAddr != 0 && m_nRemotePort != 0)
    {
        m_state = udpInitialized;
        if (m_state != udpBound)
        {
 
            /// Openwave sdk does bind inside connect
            /// we do binding here due to when Bind is called, the Init is not called
            /// with valid m_nRemotePort and m_ulRemoteAddr.
            connect(m_nLocalPort, m_nRemotePort, m_ulRemoteAddr);
        
            //OpDPRINTF("UDP::Init: this=%p, ulLocalAddr=%d, localport=%d, remotePort=%d, remoteaddr=%d\n", this, 
            //            m_ulLocalAddr,m_nLocalPort, m_nRemotePort, m_ulRemoteAddr);
            m_state = udpBound;        
            m_bWritable = FALSE;
            m_bReadable = FALSE;
        }
    }

    return res;
}


STDMETHODIMP 
HXOpwaveUDPSocket::Bind(THIS_
                        UINT32 ulLocalAddr,
                        UINT16 nPort)
{
    
    DPRINTF(D_UDPSOCKET, ("HXOpwaveUDPSocket::Bind(%08lx, %u)\n", ulLocalAddr, nPort));
    
    /// Until OpSocket implement the DNS layer, this is nothting but cache address and
    /// port values
    /// OpSocket has bind function built into connect
  
    HX_RESULT res = HXR_OK;
    
    m_ulLocalAddr = ulLocalAddr;
    m_nLocalPort = nPort;
    if (m_state == udpInitialized && m_state != udpBound && m_nLocalPort != 0)
    {
        /// Only do binding if it is initialized 
        /// Openwave sdk does bind inside connect
        connect(m_nLocalPort, m_nRemotePort, m_ulRemoteAddr);
        
        //OpDPRINTF("UDP::Bind: this=%p, ulLocalAddr=%d, localport=%d, remotePort=%d, remoteaddr=%d\n", this, 
        //           m_ulLocalAddr,m_nLocalPort, m_nRemotePort, m_ulRemoteAddr);
        m_state = udpBound;        
        m_bWritable = FALSE;
        m_bReadable = FALSE;

    }
    return res;
}


STDMETHODIMP 
HXOpwaveUDPSocket::Read(THIS_
                        UINT16 Size)
{
    
    DPRINTF(D_UDPSOCKET, ("HXOpwaveUDPSocket::Read(%u)\n", Size));
    
    HX_RESULT res = HXR_OK;
    m_ulReadSize = Size;

    //OpDPRINTF("UDP:Read: this=%p, size=%d, bread=%d, state=%d, bwrite=%d\n", this, Size, m_bReadable, m_state, m_bWritable);
    if (m_state == udpBound)
    {
        if (m_bReadable && m_ulReadSize)
        {
            /// avoid recursion that might occur because 
            /// OnReadDone call in DoRead invoke ::Read again
            m_bReadable = FALSE;
            res = DoRead();
        }
    }
    return res;
    
}

/// Work horse for reading. As long as we are initilized once 
/// to read, we always try to read something of the socket.
HX_RESULT
HXOpwaveUDPSocket::DoRead()
{
    /// Create a new IHXBuffer for every read
    HX_RESULT res = HXR_FAIL;
    IHXBuffer* pReadBuffer = NULL;
    res = m_pCCF->CreateInstance(IID_IHXBuffer, (void**)&pReadBuffer);