CALastMix.hpp

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/*
Copyright (c) 2000, The JAP-Team
All rights reserved.
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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
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*/
#ifndef __CALASTMIX__
#define __CALASTMIX__
#ifndef ONLY_LOCAL_PROXY
#include "CAMix.hpp"
#include "CAMuxSocket.hpp"
#include "CAASymCipher.hpp"
#include "CASocketAddrINet.hpp"
#include "CACacheLoadBalancing.hpp"
//#include "CASignature.hpp"
#include "CAUtil.hpp"
#include "CAQueue.hpp"
#include "CAInfoService.hpp"
#ifdef LOG_CRIME
  #include "tre/regex.h"
#endif
#include "CALogPacketStats.hpp"
#ifndef NEW_MIX_TYPE // not TypeB mixes
  /* TypeB mixes are using an own implementation */
  #include "CALastMixChannelList.hpp"
#endif

#ifdef REPLAY_DETECTION
  #include "CAMixWithReplayDB.hpp"
#endif

THREAD_RETURN lm_loopLog(void*);
THREAD_RETURN lm_loopSendToMix(void* param);
THREAD_RETURN lm_loopReadFromMix(void* pParam);

class CALastMix:public
#ifdef REPLAY_DETECTION
  CAMixWithReplayDB
#else
  CAMix
#endif
  {
    public:
      CALastMix()
        {
          m_pMuxIn=NULL;
          //m_pSignature=NULL;
          m_pMultiSignature=NULL;
          m_pRSA=NULL;
          m_pInfoService=NULL;
          #ifndef NEW_MIX_TYPE // not TypeB mixes
            /* TypeB mixes are using an own implementation */
          m_pChannelList=NULL;
          #endif
          m_pthreadSendToMix=m_pthreadReadFromMix=NULL;
          m_pQueueSendToMix=m_pQueueReadFromMix=NULL;
          m_pCacheLB=new CACacheLoadBalancing();
          m_pSocksLB=new CACacheLoadBalancing();

          #ifdef LOG_PACKET_STATS
            m_pLogPacketStats=NULL;
          #endif
          #ifdef LOG_CRIME
          //OK lets try to use a regular expression for the task instead of a hand crafted parser...
            const char* request_line_regexp="[\n\r]*([^ ]+)[ ]+([^ ]+)"; //
            m_pregexpRequestLine=new regex_t;
            regcomp(m_pregexpRequestLine,request_line_regexp,REG_EXTENDED );  
            // Regexp for Domain of URI
            const char* uri_regexp="[^:]+[:][/][/]([^:/]+)"; //
            m_pregexpDomainOfURI=new regex_t;
            regcomp(m_pregexpDomainOfURI,uri_regexp,REG_EXTENDED );
          #endif
        }

      virtual ~CALastMix()
        {
          clean();
          delete m_pCacheLB;
          m_pCacheLB = NULL;
          delete m_pSocksLB;
          m_pSocksLB = NULL;
#ifdef LOG_CRIME
          regfree(m_pregexpRequestLine);
          delete m_pregexpRequestLine;
          regfree(m_pregexpDomainOfURI);
          delete m_pregexpDomainOfURI;
#endif
        }

      SINT32 reconfigure();
      tMixType getType() const
        {
          return CAMix::LAST_MIX;
        }

  protected:
#ifdef DYNAMIC_MIX
      void stopCascade()
      {
        m_bRestart = true;
      }
#endif
      virtual SINT32 loop()=0;
      SINT32 init();
      virtual SINT32 initOnce();
      SINT32 clean();
      #ifdef NEW_MIX_TYPE // TypeB mixes
        virtual void reconfigureMix();
      #endif

    // added by ronin <ronin2@web.de>
    SINT32 initMixCascadeInfo(DOMElement* );

    // moved to CAMix.hpp
    virtual SINT32 processKeyExchange();


      SINT32 setTargets();
#ifdef LOG_CRIME
      bool   checkCrime(const UINT8* payLoad,UINT32 payLen,bool bURLCheck);
      UINT8 *parseDomainFromPayload(const UINT8 *payloadData, UINT32 payloadDataLength);
#endif

    protected:
      volatile bool         m_bRestart;
      CAMuxSocket*          m_pMuxIn;
      CAQueue* m_pQueueSendToMix;
      CAQueue* m_pQueueReadFromMix;
      #ifdef LOG_PACKET_TIMES
        CALogPacketStats* m_pLogPacketStats;
      #endif
      CACacheLoadBalancing* m_pCacheLB;
      CACacheLoadBalancing* m_pSocksLB;
      CAASymCipher*         m_pRSA;
      CAThread*             m_pthreadSendToMix;
      CAThread*             m_pthreadReadFromMix;
      #ifndef NEW_MIX_TYPE // not TypeB mixes
        /* TypeB mixes are using an own implementation */
      CALastMixChannelList* m_pChannelList;
      #endif

#ifdef LOG_CRIME
      regex_t*              m_pregexpRequestLine; //Regexp used to find the URI of a request line
      regex_t*              m_pregexpDomainOfURI; //Regexp to find Domain of URI
      regex_t*              m_pCrimeRegExpsURL;
      UINT32                m_nCrimeRegExpsURL;
      regex_t*              m_pCrimeRegExpsPayload;
      UINT32                m_nCrimeRegExpsPayload;
#endif

    protected:
      friend THREAD_RETURN  lm_loopSendToMix(void* param);
      friend THREAD_RETURN  lm_loopReadFromMix(void* pParam);
      friend THREAD_RETURN  lm_loopLog(void*);
      volatile bool         m_bRunLog;
      volatile UINT32       m_logUploadedPackets;
      volatile UINT64       m_logUploadedBytes;
      volatile UINT32       m_logDownloadedPackets;
      volatile UINT64       m_logDownloadedBytes;
  };

#endif
#endif //ONLY_LOCAL_PROXY