CAMiddleMix.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,
OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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 __CAMIDDLEMIX__
#define __CAMIDDLEMIX__
 
#include "CAMix.hpp"
#include "CAMuxSocket.hpp"
#include "CAASymCipher.hpp"
#include "CAMiddleMixChannelList.hpp"
#include "CAQueue.hpp"
#include "CAInfoService.hpp"
#include "CAMixWithReplayDB.hpp"
 
class CAMiddleMix:public
#ifdef REPLAY_DETECTION
  CAMixWithReplayDB
#else
  CAMix
#endif
{
    public:
      CAMiddleMix()
        {
          m_pMiddleMixChannelList=NULL;
          m_pMuxOut=NULL;m_pMuxIn=NULL;m_pRSA=NULL;
          //m_pSignature=NULL;
          m_pMultiSignature=NULL;
          m_pInfoService=NULL;
          m_pQueueSendToMixBefore=m_pQueueSendToMixAfter=NULL;
          upstreamPreBuffer=NULL;
          upstreamPostBuffer=NULL;
          m_bShMemConfigured=false;
#ifdef DYNAMIC_MIX
          m_bBreakNeeded = false;
#endif
#ifdef LOG_PACKET_TIMES
          m_pLogPacketStats = NULL;
#endif 
        }
 
      virtual ~CAMiddleMix(){clean();};
      tMixType getType() const
        {
          return CAMix::MIDDLE_MIX;
        }
 
    friend THREAD_RETURN mm_loopSendToMixBefore(void*);
    friend THREAD_RETURN mm_loopSendToMixAfter(void*);
    friend THREAD_RETURN mm_loopReadFromMixBefore(void*);
    friend THREAD_RETURN mm_loopReadFromMixAfter(void*);
    //friend THREAD_RETURN mm_loopDownStream(void *);
 
    private:
      SINT32 loop();
      SINT32 init();
      SINT32 initOnce();
      SINT32 clean();
      SINT32 connectToNextMix(CASocketAddr* a_pAddrNext);
 
      SINT32 putMixPacketIntoQueueSendToMixBefore(tPoolEntry* pPoolEntry);
 
#ifdef DYNAMIC_MIX
      bool m_bBreakNeeded;
#endif
 
    virtual SINT32 initMixCascadeInfo(DOMElement* )
    {
        return E_SUCCESS;
    }
 
    virtual SINT32 processKeyExchange();
 
protected:
    CAMuxSocket *m_pMuxIn;
    CAMuxSocket *m_pMuxOut;
private:
      CAASymCipher* m_pRSA;
 
      //CASignature* m_pSignature;
      volatile bool m_bRun;
      CAMiddleMixChannelList* m_pMiddleMixChannelList;
      //CAInfoService* m_pInfoService;
//      friend THREAD_RETURN mm_loopDownStream(void *p);
 
 
      /*shared memory*/
      const char *upstreamMemoryPreName="upstreamshmempre";
      const char *upstreamMemoryPostName="upstreamshmempost";
      const char *downstreamMemoryPreName="downstreamshmempre";
      const char *downstreamMemoryPostName="downstreamshmempost";
 
      void* upstreamPreBuffer;
      void* upstreamPostBuffer;
      void* downstreamPreBuffer;
      void* downstreamPostBuffer;
    
      /*shared memory semaphors*/
      int upstreamSemPreId, upstreamSemPostId;
      int downstreamSemPreId, downstreamSemPostId;
      bool m_bShMemConfigured;
      
      int accessSharedMemory(int semId, tPoolEntry* destination, tPoolEntry* source);
      
protected:
      CAQueue* m_pQueueSendToMixBefore;
      CAQueue* m_pQueueSendToMixAfter;
 
      UINT32 m_u32KeepAliveRecvInterval2;
      UINT32 m_u32KeepAliveSendInterval2;
#ifdef LOG_PACKET_TIMES
      CALogPacketStats *m_pLogPacketStats;
#endif
 
#ifdef DYNAMIC_MIX
      void stopCascade()
      {
        m_bRun = false;
      }
#endif
  };
 
#ifdef LOG_CRIME
  static void crimeSurveillanceUpstream(MIXPACKET *pMixPacket, HCHANNEL prevMixChannel);
#endif
 
#endif