preftran.cpp

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: preftran.cpp,v 1.18.8.2 2004/07/09 02:07:14 hubbe Exp $
 * 
 * Portions Copyright (c) 1995-2004 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
 * RealNetworks.  You may not use this file except in compliance with
 * the RPSL or, if you have a valid RCSL with RealNetworks applicable
 * 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
 * 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 terms of either the RPSL
 * or RCSL, indicate your decision by deleting the provisions above
 * and replace them with the notice and other provisions required by
 * the GPL. If you do not delete the provisions above, a recipient may
 * use your version of this file under the terms of any one of the
 * RPSL, the RCSL or the GPL.
 * 
 * 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
 * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET
 * ENJOYMENT OR NON-INFRINGEMENT.
 * 
 * Technology Compatibility Kit Test Suite(s) Location:
 *    http://www.helixcommunity.org/content/tck
 * 
 * Contributor(s):
 * 
 * ***** END LICENSE BLOCK ***** */

#include "hxcom.h"
#include "hxtypes.h"
#include "hlxclib/string.h"
#include "hlxclib/stdio.h"
#ifdef _MACINTOSH
//#include <stat.mac.h> // Not needed on Mac and doesn't exist in CW Pro 7.
#else
#include "hlxclib/sys/types.h"
#include "hlxclib/sys/stat.h"
#endif
#include "hlxclib/time.h"
#if defined(_AIX)
#include <ctype.h>
#endif

#if defined(_WINDOWS)  
#include <windows.h>
#ifndef _WINCE
#include <winsock2.h>
#include <ws2tcpip.h>
#endif /* _WINCE */
#endif /* _WINDOWS */
#include "hlxclib/sys/socket.h"

#include "hxresult.h"
#include "hxslist.h"
#include "ihxpckts.h"
#include "hxstrutl.h"
#include "dbcs.h"
#include "dllpath.h"
#include "hxprefs.h"
#include "hxprefutil.h"
#include "hxthread.h"
#include "netbyte.h"
#include "hxpxymgr.h"
#include "portaddr.h"
#include "prefdefs.h"
#include "hxengin.h"
#include "hxnetif.h"
#include "pacutil.h"
#include "preftran.h"


#ifdef _UNIX
#include <sys/types.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <sys/socket.h>
#if defined _SOLARIS || defined _FREEBSD || defined _OPENBSD || defined _NETBSD
#include <sys/sockio.h>
#endif
#include <net/if.h>
#include <sys/ioctl.h>
#endif

#include "hlxclib/stdlib.h" // for i64toa

#if defined (_UNIX) && !defined(_SUN) && !defined(_SCO_UW) && !defined(_HPUX) && !defined(_IRIX) && !defined(_OSF1)
#include <sys/file.h>
#endif /* UNIX */

#define RM_PREFTRAN_CAPTION	"# RealMedia Preferred Transport File\n# This is a generated file!  Do not edit.\n\n"
#define RM_PREFTRAN_DIR_NAME	"preftran/"
#define RM_PREFTRAN_FILE_LOCK	"PrefTranFileLock"

#include "hxdir.h" /* for OS_SEPARATOR_CHAR and OS_SEPARATOR_STRING */


HXPreferredTransport::HXPreferredTransport(HXPreferredTransportManager* pOwner)
		     : m_lRefCount(0)
		     , m_pOwner(pOwner)
		     , m_bHTTPNG(FALSE)
		     , m_pHost(NULL)
		     , m_ulHost(0)
		     , m_ulParentPlaybacks(0)
		     , m_uPlaybacks(0)
		     , m_uCloakPort(0)
		     , m_state(PTS_UNKNOWN)
		     , m_lastUsedTime(0)
		     , m_prefTransportClass(PTC_UNKNOWN)
		     , m_prefTransportProtocol(PTP_UNKNOWN)
		     , m_prefTransportType(UnknownMode)
		     , m_pPrefTransportSinkList(NULL)
{
    HX_ADDREF(m_pOwner);
}

HXPreferredTransport::~HXPreferredTransport()
{
    Close();
}

STDMETHODIMP
HXPreferredTransport::QueryInterface(REFIID riid, void**ppvObj)
{
    QInterfaceList qiList[] =
        {
            { GET_IIDHANDLE(IID_IHXPreferredTransport), (IHXPreferredTransport*)this },
            { GET_IIDHANDLE(IID_IUnknown), (IUnknown*)(IHXPreferredTransport*)this },
        };
    
    return ::QIFind(qiList, QILISTSIZE(qiList), riid, ppvObj);
}

/////////////////////////////////////////////////////////////////////////
//  Method:
//	IUnknown::AddRef
//  Purpose:
//	Everyone usually implements this the same... feel free to use
//	this implementation.
//
STDMETHODIMP_(ULONG32) 
HXPreferredTransport::AddRef()
{
    return InterlockedIncrement(&m_lRefCount);
}

/////////////////////////////////////////////////////////////////////////
//  Method:
//	IUnknown::Release
//  Purpose:
//	Everyone usually implements this the same... feel free to use
//	this implementation.
//
STDMETHODIMP_(ULONG32) 
HXPreferredTransport::Release()
{
    if (InterlockedDecrement(&m_lRefCount) > 0)
    {
        return m_lRefCount;
    }

    delete this;
    return 0;
}

/*
 * IHXPreferredTransport methods
 */
STDMETHODIMP
HXPreferredTransport::GetTransport (REF(TransportMode)	/* OUT */   prefTransportType,
				    REF(UINT16)		/* OUT */   ulCloakPort)
{
    HX_RESULT	rc = HXR_OK;

    prefTransportType = UnknownMode;
    ulCloakPort = 0;

    switch (m_state)
    {
    case PTS_CREATE:
	m_state = PTS_PENDING;
	prefTransportType = m_prefTransportType;
	ulCloakPort = m_uCloakPort;
	break;
    case PTS_PENDING:
	rc = HXR_WOULD_BLOCK;
	break;
    case PTS_READY:
	prefTransportType = m_prefTransportType;
	ulCloakPort = m_uCloakPort;
	break;
    default:
	break;
    }

    return rc;
}
    
STDMETHODIMP
HXPreferredTransport::SetTransport(TransportMode   /* IN  */   prefTransportType,
				    UINT16	    /* IN  */   ulCloakPort)
{
    HX_RESULT	rc = HXR_OK;
    BOOL	bSave = FALSE;
    UINT32	ulTransportMask = 0;

    HX_ASSERT(UnknownMode != prefTransportType);

    // we will mask UDP to Multicast if Multicast is selected given
    // the fact the server will always try UDP along with Multicast request
    if (UDPMode == prefTransportType && m_pOwner)
    {
	if (PTP_RTSP == m_prefTransportProtocol)
	{
	    ulTransportMask = m_pOwner->m_ulRTSPTransportMask;
	}
	else
	{
	    ulTransportMask = m_pOwner->m_ulPNMTransportMask;
    	}

	if (ulTransportMask & ATTEMPT_MULTICAST)
	{
	    prefTransportType = MulticastMode;
	}
    }

    m_state = PTS_READY;
    m_uCloakPort = ulCloakPort;
    m_lastUsedTime = time(NULL);

    if (m_prefTransportType != prefTransportType)
    {
	bSave = TRUE;
	m_uPlaybacks = 0;
	m_prefTransportType = prefTransportType;
    }

    if (m_pPrefTransportSinkList)
    {
	CHXSimpleList::Iterator i = m_pPrefTransportSinkList->Begin();
	for (; i != m_pPrefTransportSinkList->End(); ++i)
	{
	    IHXPreferredTransportSink* pSink = (IHXPreferredTransportSink*)*i;
	    pSink->TransportSucceeded(m_prefTransportType, m_uCloakPort);
	}
    }

    if (m_pOwner)
    {
        m_pOwner->TransportSet(this, bSave);
    }

    return rc;
}

STDMETHODIMP
HXPreferredTransport::SwitchTransport(HX_RESULT	    /* IN  */   error,
				      REF(TransportMode)    /* INOUT */	prefTransportType)
{
    if (m_pOwner)
    {
        return m_pOwner->DownShiftTransport(error, this, prefTransportType);
    }

    return HXR_FAILED;
}

STDMETHODIMP
HXPreferredTransport::RemoveTransport()
{
    m_state = PTS_UNKNOWN;
    m_uPlaybacks = 0;
    m_uCloakPort = 0;
    m_prefTransportType = UnknownMode;
    m_lastUsedTime = 0;

    if (m_pPrefTransportSinkList)
    {
	CHXSimpleList::Iterator i = m_pPrefTransportSinkList->Begin();
	for (; i != m_pPrefTransportSinkList->End(); ++i)
	{
	    IHXPreferredTransportSink* pSink = (IHXPreferredTransportSink*)*i;
	    pSink->TransportFailed();
	}
    }

    return HXR_OK;
}
    
STDMETHODIMP_(BOOL)
HXPreferredTransport::ValidateTransport(TransportMode    /* IN */	prefTransportType)
{
    if (m_pOwner)
    {
        return m_pOwner->ValidateTransport(this, prefTransportType);
    }

    return FALSE;
}

STDMETHODIMP_(PreferredTransportState)
HXPreferredTransport::GetState()
{
    return m_state;
}

STDMETHODIMP_(PreferredTransportClass)
HXPreferredTransport::GetClass()
{
    return m_prefTransportClass;
}

STDMETHODIMP
HXPreferredTransport::AddTransportSink(IHXPreferredTransportSink*	/* IN  */   pPrefTransportSink)
{
    LISTPOSITION lPosition = 0;

    if (!pPrefTransportSink)
    {
	return HXR_FAILED;
    }

    if (!m_pPrefTransportSinkList)
    {
	m_pPrefTransportSinkList = new CHXSimpleList;
    }
    else
    {
	lPosition = m_pPrefTransportSinkList->Find(pPrefTransportSink);
    }

    if (!lPosition)
    {
	pPrefTransportSink->AddRef();
	m_pPrefTransportSinkList->AddTail(pPrefTransportSink);
    }

    return HXR_OK;
}

STDMETHODIMP
HXPreferredTransport::RemoveTransportSink(IHXPreferredTransportSink*	/* IN  */   pPrefTransportSink)
{
    if (!m_pPrefTransportSinkList)
    {
	return HXR_UNEXPECTED;
    }

    LISTPOSITION lPosition = m_pPrefTransportSinkList->Find(pPrefTransportSink);
    if (!lPosition)
    {
	return HXR_UNEXPECTED;
    }

    m_pPrefTransportSinkList->RemoveAt(lPosition);
    HX_RELEASE(pPrefTransportSink);
    
    return HXR_OK;
}

STDMETHODIMP_(BOOL)
HXPreferredTransport::GetHTTPNG()
{
    return m_bHTTPNG;
}

STDMETHODIMP
HXPreferredTransport::SetHTTPNG(BOOL bHTTPNG)
{
    m_bHTTPNG = bHTTPNG;
    return HXR_OK;
}

void
HXPreferredTransport::Initialize()
{
    TransportMode upShiftToTransport = UnknownMode;

    if (!m_pOwner)
    {
        return;
    }

    if (m_lastUsedTime && PTS_READY == m_state)
    {
	// detect whether the preferences has been changed
	// since its last use
	if (PTP_RTSP == m_prefTransportProtocol &&
	    m_lastUsedTime < m_pOwner->m_lastRTSPPreferencesModifiedTime)
	{
	    m_state = PTS_CREATE;
	    m_uPlaybacks = 0;
	    m_prefTransportType = m_pOwner->m_rtspTransportTypeStartWith;
	}
	else if (PTP_PNM == m_prefTransportProtocol &&
	         m_lastUsedTime < m_pOwner->m_lastPNMPreferencesModifiedTime)
	{
	    m_state = PTS_CREATE;
	    m_uPlaybacks = 0;
	    m_prefTransportType = m_pOwner->m_pnmTransportTypeStartWith;
	}
	else if (m_pOwner->m_ulPlaybacks != m_ulParentPlaybacks)
	{
	    m_ulParentPlaybacks = m_pOwner->m_ulPlaybacks;   
	    m_uPlaybacks++;
	    // save the playback counter for UpShift
	    if (PTP_RTSP == m_prefTransportProtocol &&
		m_prefTransportType > m_pOwner->m_rtspTransportTypeStartWith)
	    {
		m_pOwner->m_bSave = TRUE;
	    }
	    else if (PTP_PNM == m_prefTransportProtocol &&
		     m_prefTransportType > m_pOwner->m_pnmTransportTypeStartWith)
	    {
		m_pOwner->m_bSave = TRUE;
	    }		

	    // attempt transport upshift every 3rd play
	    m_uPlaybacks = m_uPlaybacks % 3;
	    if (0 == m_uPlaybacks)
	    {
		upShiftToTransport = m_prefTransportType;
		m_pOwner->UpShiftTransport(this, upShiftToTransport);

		if (upShiftToTransport != m_prefTransportType)
		{
		    m_state = PTS_CREATE;
		    m_prefTransportType = upShiftToTransport;
		}
	    }
	}
    }
    // this is the first use
    else
    {
	if (PTS_CREATE == m_state)
	{
	    m_uPlaybacks = 0;
	    m_prefTransportType = m_pOwner->GetTransportPreferred(this);
	}
	else
	{
	    HX_ASSERT(PTS_PENDING == m_state);
	    m_prefTransportType = UnknownMode;
	}
    }
    
    // sanity check
    if (UnknownMode != m_prefTransportType)
    {
	if (PTP_RTSP == m_prefTransportProtocol)
	{
	    HX_ASSERT(m_prefTransportType >= m_pOwner->m_rtspTransportTypeStartWith);
	}
	else if (PTP_PNM == m_prefTransportProtocol)
	{
	    HX_ASSERT(m_prefTransportType >= m_pOwner->m_pnmTransportTypeStartWith);
	}
    }

    return;
}

void
HXPreferredTransport::Close()
{
    HX_DELETE(m_pHost);

    if (m_pPrefTransportSinkList)
    {
	CHXSimpleList::Iterator i = m_pPrefTransportSinkList->Begin();
	for (; i != m_pPrefTransportSinkList->End(); ++i)
	{
	    IHXPreferredTransportSink* pSink = (IHXPreferredTransportSink*)*i;
	    HX_RELEASE(pSink);
	}
	HX_DELETE(m_pPrefTransportSinkList);
    }

    HX_RELEASE(m_pOwner);
}

HXPreferredTransportManager::HXPreferredTransportManager(IUnknown* pContext)
			    : m_lRefCount(0)	
			    , m_bSave(FALSE)
			    , m_pszFile(NULL)
			    , m_ulRTSPTransportMask(ATTEMPT_AUTOTRANSPORT)
			    , m_ulPNMTransportMask(ATTEMPT_AUTOTRANSPORT)
			    , m_ulLocalHost(0)
			    , m_ulSubnetMask(0)
			    , m_ulSubnet(0)
			    , m_ulPlaybacks(0)
			    , m_lastRTSPPreferencesModifiedTime(0)
			    , m_lastPNMPreferencesModifiedTime(0)
			    , m_internalTransportType(MulticastMode)