CASyncControlChannel.hpp

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/*
Copyright (c) 2000, The JAP-Team 
All rights reserved.
Redistribution and use in source and binary forms, with or without modification, 
are permitted provided that the following conditions are met:
 
  - Redistributions of source code must retain the above copyright notice, 
    this list of conditions and the following disclaimer.
 
  - Redistributions in binary form must reproduce the above copyright notice, 
    this list of conditions and the following disclaimer in the documentation and/or 
    other materials provided with the distribution.
 
  - Neither the name of the University of Technology Dresden, Germany nor the names of its contributors 
    may be used to endorse or promote products derived from this software without specific 
    prior written permission. 
 
  
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS 
OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 
AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 
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IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
*/
 
#ifndef _CASYNCCONTROLCHANNEL_
#define _CASYNCCONTROLCHANNEL_
#if !defined ONLY_LOCAL_PROXY || defined INCLUDE_FIRST_MIX
#include "CAAbstractControlChannel.hpp"
 
class CASyncControlChannel : public CAAbstractControlChannel
{
  public:
      CASyncControlChannel(UINT8 id, bool bIsEncrypted):  
          CAAbstractControlChannel(id,bIsEncrypted)
        {
          m_MsgBuff=new UINT8[0xFFFF+32];
          m_aktIndex=0;
          m_MsgBytesLeft=0;
        }
     virtual  ~CASyncControlChannel();
    virtual SINT32 processXMLMessage(const XERCES_CPP_NAMESPACE::DOMDocument* docMsg)=0;
 
  protected:
    SINT32 proccessMessage(const UINT8* msg, UINT32 msglen)
      {
        #ifdef DEBUG
          CAMsg::printMsg(LOG_DEBUG,"CASyncControlChannel::proccessMessage - msglen=%u\n",msglen);
        #endif
        if(m_MsgBytesLeft==0)//start of new XML Msg
          {
            if(msglen<2)//this should never happen...
              return E_UNKNOWN;
            m_MsgBytesLeft=(msg[0]<<8)|msg[1];
            if(m_bIsEncrypted && m_pDispatcher->isKeySet()) // note: the second check is just a workaround for the time the encryption is not support by all JAPs/Mixes
              {
                m_MsgBytesLeft+=16;//auth tag 
              }
            #ifdef DEBUG
              CAMsg::printMsg(LOG_DEBUG,"CASyncControlChannel::proccessMessage - start of a new msg of len=%u\n",m_MsgBytesLeft);
            #endif
            msglen-=2;
            m_aktIndex=msglen;
            m_MsgBytesLeft-=msglen;
            memcpy(m_MsgBuff,msg+2,msglen);
          }
        else//received some part...
          {
            msglen=min(m_MsgBytesLeft,msglen);
            memcpy(m_MsgBuff+m_aktIndex,msg,msglen);
            m_aktIndex+=msglen;
            m_MsgBytesLeft-=msglen;
          }
        if(m_MsgBytesLeft==0)
          {//whole msg receveid
            if(m_bIsEncrypted)
              {
                UINT8* buff=new UINT8[m_aktIndex];
                memcpy(buff,m_MsgBuff,m_aktIndex);
                m_pDispatcher->decryptMessage(buff,m_aktIndex,m_MsgBuff,&m_aktIndex);
                delete[]buff;
              }
            return proccessMessageComplete();
          }
        return E_SUCCESS;
      }
 
    SINT32 proccessMessageComplete()
      {
        #ifdef DEBUG
          if(m_aktIndex<0xFFFF)
            {
              m_MsgBuff[m_aktIndex]=0;
              CAMsg::printMsg(LOG_DEBUG,"CASyncControlChannel::proccessMessageComplete() - msg=%s\n",m_MsgBuff);
            }
          else
            CAMsg::printMsg(LOG_DEBUG,"CASyncControlChannel::proccessMessageComplete() \n");
        #endif
        
        XERCES_CPP_NAMESPACE::DOMDocument* doc=parseDOMDocument(m_MsgBuff,m_aktIndex);
        m_aktIndex=0;
        m_MsgBytesLeft=0;
        if(doc==NULL)
        {
          CAMsg::printMsg(LOG_DEBUG,"CASyncControlChannel:: received XML document could not be parsed\n");
          return E_UNKNOWN;
        }
        #ifdef DEBUG
          CAMsg::printMsg(LOG_DEBUG,"CASyncControlChannel::proccessMessageComplete() call processXMLMessage()\n");
        #endif
        SINT32 ret=processXMLMessage(doc);
        if (doc != NULL)
        {
          doc->release();
          doc = NULL;
        }
        return ret;
      }
 
    UINT8* m_MsgBuff;
    UINT32 m_aktIndex;
    UINT32 m_MsgBytesLeft;
};
#endif 
#endif //ONLY_LOCAL_PROXY