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hxnetif.cpp：源码内容
							/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: RCSL 1.0/RPSL 1.0 
 *  
 * 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 
 * Version 1.0 (the "RPSL") available at 
 * http://www.helixcommunity.org/content/rpsl unless you have licensed 
 * the file under the RealNetworks Community Source License Version 1.0 
 * (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.  
 *  
 * 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 <string.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include "hxresult.h"
#include "hxslist.h"
#include "netbyte.h"
#include "hxengin.h"
#include "hxnetif.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
#if defined (_UNIX) && !defined(_SUN) && !defined(_SCO_UW) && !defined(_HPUX) && !defined(_IRIX) && !defined(_OSF1)
#include <sys/file.h>
#endif /* UNIX */
HXNetInterface::HXNetInterface(IUnknown* pContext)
    : m_lRefCount(0)
    , m_bInitialized(FALSE)
    , m_pNetInterfaceList(NULL)
    , m_pSinkList(NULL)
{
}
HXNetInterface::~HXNetInterface()
{
    Close();
}
STDMETHODIMP
HXNetInterface::QueryInterface(REFIID riid, void**ppvObj)
{
    if (IsEqualIID(riid, IID_IUnknown))
    {
        AddRef();
        *ppvObj = this;
        return HXR_OK;
    }
    else if (IsEqualIID(riid, IID_IHXNetInterfaces))
    {
        AddRef();
        *ppvObj = (IHXNetInterfaces*)this;
        return HXR_OK;
    }
    *ppvObj = NULL;
    return HXR_NOINTERFACE;
}
/////////////////////////////////////////////////////////////////////////
//  Method:
//  IUnknown::AddRef
//  Purpose:
//  Everyone usually implements this the same... feel free to use
//  this implementation.
//
STDMETHODIMP_(ULONG32) 
    HXNetInterface::AddRef()
{
    return InterlockedIncrement(&m_lRefCount);
}
/////////////////////////////////////////////////////////////////////////
//  Method:
//  IUnknown::Release
//  Purpose:
//  Everyone usually implements this the same... feel free to use
//  this implementation.
//
STDMETHODIMP_(ULONG32) 
    HXNetInterface::Release()
{
    if (InterlockedDecrement(&m_lRefCount) > 0)
    {
        return m_lRefCount;
    }
    delete this;
    return 0;
}
STDMETHODIMP
HXNetInterface::UpdateNetInterfaces(void)
{
    HX_RESULT rc = HXR_OK;    
    BOOL bChanged = FALSE;
    bChanged = IsNetInterfaceChanged();
    if (!m_bInitialized)
    {
	m_bInitialized = TRUE;
    }
    else if (bChanged && m_pSinkList)
    {
        CHXSimpleList::Iterator ndx = m_pSinkList->Begin();
        for (; ndx != m_pSinkList->End(); ++ndx)
        {
            IHXNetInterfacesAdviseSink* pSink = (IHXNetInterfacesAdviseSink*) (*ndx);
            pSink->NetInterfacesUpdated();
        }
    }
    
    return rc;
}
HX_RESULT
HXNetInterface::RetrieveNetInterface(CHXSimpleList*& pNetInterfaceList)
{
    HX_RESULT     rc = HXR_OK;    
    int           i, fd, num;
    char          buf[BUFSIZ]; /* Flawfinder: ignore */
    long          lFlags = 0;
    NIInfo*       pNIInfo = NULL; 
    struct ifconf ifc;
    struct ifreq* ifr;
    fd = socket(AF_INET, SOCK_DGRAM, 0);
    if (-1 == fd)
    {
        rc = HXR_FAILED;
        goto cleanup;
    }
    ifc.ifc_len = BUFSIZ;
    ifc.ifc_buf = buf;
    // get network interface configuration
    if (-1 == ioctl(fd, SIOCGIFCONF, &ifc))
    {
        rc = HXR_FAILED;
        goto cleanup;
    }
    num = ifc.ifc_len / sizeof(struct ifreq);
    // iterate through the network interface
    for (i = 0, ifr = ifc.ifc_req; i < num; i++, ifr += 1) 
    {
        if (-1 != ioctl(fd, SIOCGIFFLAGS, ifr)) 
        {
            pNIInfo = new NIInfo;
        
            lFlags = ifr->ifr_flags;
            if (lFlags & IFF_LOOPBACK)
            {
                pNIInfo->type = LOOPBACK;
            }
            else if (lFlags & IFF_POINTOPOINT)
            {
                pNIInfo->type = POINTTOPOINT;
            }
            else if (lFlags & IFF_BROADCAST)
            {
                pNIInfo->type = BROADCAST;
            }
            if (lFlags & IFF_UP)
            {
                pNIInfo->bActive = TRUE;
            }
            if (-1 != ioctl(fd, SIOCGIFADDR, ifr))
            {
                pNIInfo->ulNetAddress =
                    ((struct sockaddr_in *)&ifr->ifr_broadaddr)->sin_addr.s_addr;   
            }
            
            if (-1 != ioctl(fd, SIOCGIFNETMASK, ifr))
            {
                pNIInfo->ulNetMask =
                    ((struct sockaddr_in *)&ifr->ifr_broadaddr)->sin_addr.s_addr;
            }
            if (!pNetInterfaceList)
            {
                pNetInterfaceList = new CHXSimpleList;
            }
            pNetInterfaceList->AddTail(pNIInfo);
        }
    }
cleanup:
    close(fd);
    
    return rc;
}
STDMETHODIMP_(UINT32)
    HXNetInterface::GetNumOfNetInterfaces()
{
    if (!m_bInitialized)
    {
	UpdateNetInterfaces();
    }
    return m_pNetInterfaceList ? m_pNetInterfaceList->GetCount() : 0;
}
STDMETHODIMP HXNetInterface::GetNetInterfaces(UINT16   lIndex,
                                               REF(NIInfo*) pNIInfo)
{
    HX_RESULT  rc = HXR_OK;
    int        i = 0;
    CHXSimpleList::Iterator iter;
    
    pNIInfo = NULL;
    
    if (!m_bInitialized)
    {
	UpdateNetInterfaces();
    }
    
    if (m_pNetInterfaceList)
    {
        iter = m_pNetInterfaceList->Begin();
        for (; iter != m_pNetInterfaceList->End(); ++iter, ++i)
        {
            NIInfo* pInfo = (NIInfo*)(*iter);
            if (i == lIndex)
            {
                pNIInfo = pInfo;
                break;
            }
        }
    }
    
    if (!pNIInfo)
    {
        rc = HXR_FAILED;
    }
    
  cleanup:
    
    return rc;
}
STDMETHODIMP
HXNetInterface::AddAdviseSink(IHXNetInterfacesAdviseSink* pSink)
{
    HX_RESULT   rc = HXR_OK;
    if (!m_pSinkList)
    {
        m_pSinkList = new CHXSimpleList();
    }
    pSink->AddRef();
    m_pSinkList->AddTail(pSink);
    return rc;
}
STDMETHODIMP
HXNetInterface::RemoveAdviseSink(IHXNetInterfacesAdviseSink* pSink)
{
    HX_RESULT   rc = HXR_OK;
    LISTPOSITION lPosition = m_pSinkList->Find(pSink);
    if (!lPosition)
    {
        rc = HXR_UNEXPECTED;
        goto cleanup;
    }
    m_pSinkList->RemoveAt(lPosition);
    pSink->Release();
  cleanup:
    return rc;
}
BOOL HXNetInterface::IsNetInterfaceChanged(void)
{
    BOOL            bResult = FALSE;
    CHXSimpleList*  pTempNetInterfaceList = new CHXSimpleList();
    RetrieveNetInterface(pTempNetInterfaceList);
    
    if (pTempNetInterfaceList && m_pNetInterfaceList)
    {
        if (pTempNetInterfaceList->GetCount() != m_pNetInterfaceList->GetCount())
        {
            bResult = TRUE;
        }
        else
        {
            CHXSimpleList::Iterator ndx0 = pTempNetInterfaceList->Begin();
            CHXSimpleList::Iterator ndx1 = m_pNetInterfaceList->Begin();
            for (; ndx0 != pTempNetInterfaceList->End() && ndx1 != m_pNetInterfaceList->End(); ++ndx0, ++ndx1)
            {
                NIInfo* pInfo0 = (NIInfo*)(*ndx0);
                NIInfo* pInfo1 = (NIInfo*)(*ndx1);
                
                if (pInfo0->ulNetAddress != pInfo1->ulNetAddress ||
                    pInfo0->ulNetMask != pInfo1->ulNetMask)
                {
                    bResult = TRUE;
                }
            }
        }
    }
    else if (pTempNetInterfaceList != m_pNetInterfaceList)
    {
        bResult = TRUE;
    }
    
    if (bResult)
    {
        Reset(m_pNetInterfaceList); 
        HX_DELETE(m_pNetInterfaceList);
        
        m_pNetInterfaceList = pTempNetInterfaceList;
    }
    else
    {
        Reset(pTempNetInterfaceList);
        HX_DELETE(pTempNetInterfaceList);
    }
    
    return bResult;
}
void
HXNetInterface::Reset(CHXSimpleList* pNetInterfaceList)
{
    if (pNetInterfaceList)
    {
        while (pNetInterfaceList->GetCount())
        {
            NIInfo* pNIInfo = (NIInfo*)pNetInterfaceList->RemoveHead();
            HX_DELETE(pNIInfo);
        }
    }
}
void
HXNetInterface::Close(void)
{
    Reset(m_pNetInterfaceList);
    HX_DELETE(m_pNetInterfaceList);
    if (m_pSinkList)
    {
        HX_ASSERT(m_pSinkList->GetCount() == 0);
        CHXSimpleList::Iterator ndx = m_pSinkList->Begin();
        for (; ndx != m_pSinkList->End(); ++ndx)
        {
            IHXNetInterfacesAdviseSink* pSink = (IHXNetInterfacesAdviseSink*) (*ndx);
            HX_RELEASE(pSink);
        }
        HX_DELETE(m_pSinkList);
    }
}

						