CALastMixChannelList.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 __CALASTMIXCHANNELLIST__
#define __CALASTMIXCHANNELLIST__
#if !defined ONLY_LOCAL_PROXY || defined INCLUDE_LAST_MIX 
#include "CASocket.hpp"
#include "CAMuxSocket.hpp"
#include "CAQueue.hpp"
#include "CASymChannelCipher.hpp"
#ifdef WITH_INTEGRITY_CHECK
#include "CASymCipherGCM.hpp"
#endif
#include "CAMutex.hpp"
#include "CAMsg.hpp"
#include "CAThread.hpp"
 
#define HASHTABLE_SIZE 0x00010000
#define HASH_MASK 0x0000FFFF
 
struct t_lastmixchannellist
  {
    public:
 
      HCHANNEL channelIn;
#ifdef WITH_INTEGRITY_CHECK   
      CASymCipherGCM*  pCipher;
#else
      CASymChannelCipher*  pCipher;
#endif
      CASocket*     pSocket;
      CAQueue*      pQueueSend;
      SINT32        sendmeCounterDownstream; //this counts how many packets are sent to the user without an ack recevied yet.
      SINT32        sendmeCounterUpstream; //this counts how many packets are recieved from the user without sending an ack yet.
#ifdef DELAY_CHANNELS
      UINT32        delayBucket;
      UINT32        delayBucketID;
#endif
#if defined (LOG_CHANNEL)
      UINT64        timeCreated;
#endif
#if defined (DELAY_CHANNELS_LATENCY)
      UINT64        timeLatency;
#endif
#ifdef LOG_CHANNEL
      UINT32        trafficInFromUser;
      UINT32        packetsDataOutToUser;
      UINT32        packetsDataInFromUser;
      UINT32        trafficOutToUser;
#endif
#ifdef LOG_CRIME
      bool        bIsCrime;
      bool        bLogPayload;
      time_t        timeChannelOpened;
#endif
#ifdef ANON_DEBUG_MODE
      bool          bDebug;
#endif
    private:
      struct
        {
          struct t_lastmixchannellist* prev;
          struct t_lastmixchannellist* next;
        } list_Channels;
 
      struct
        {
          struct t_lastmixchannellist* prev;
          struct t_lastmixchannellist* next;
        } list_Sockets;
    
    friend class CALastMixChannelList;
  };
 
typedef struct t_lastmixchannellist lmChannelList; 
typedef struct t_lastmixchannellist lmChannelListEntry; 
typedef lmChannelListEntry* LP_lmChannelListEntry;
 
      #ifdef DELAY_CHANNELS
        THREAD_RETURN lml_loopDelayBuckets(void*);
      #endif
class CALastMixChannelList
  {
    public:
      CALastMixChannelList();
      ~CALastMixChannelList();
 
 
      SINT32 add(HCHANNEL id,CASocket* pSocket,
#ifdef WITH_INTEGRITY_CHECK
        CASymCipherGCM* pCipher
#else
        CASymChannelCipher* pCipher
#endif
        ,CAQueue* pQueue
#ifdef LOG_CHANNEL
                  ,UINT64 timecreated,UINT32 trafficIn
#endif
#if defined(DELAY_CHANNELS_LATENCY)
                  ,UINT64 delaytime
#endif
#ifdef LOG_CRIME
                  ,bool bIsCrime,bool bLogPayload, time_t timeChannelOpend
#endif
#ifdef ANON_DEBUG_MODE
                  , bool bDebug
#endif
 
                  );
 
      lmChannelListEntry* get(HCHANNEL channelIn)
        {
          lmChannelListEntry* akt=m_HashTable[channelIn & HASH_MASK];
          while(akt!=NULL)
            {
              if(akt->channelIn==channelIn)
                return akt;
              akt=akt->list_Channels.next;
            }
          return NULL;
        }
#ifdef LOG_CRIME
      SINT32 getChannelAndSetCrime(UINT8 lastMixToProxyConnectionSrcIP[4],
        UINT16 lastMixToProxyConnectionSrcPort,
        UINT8 lastMixToProxyConnectionDstIP[4],
        UINT16 lastMixToProxyConnectionDstPort, HCHANNEL& channel)
      {
        m_pMutex->lock();
        lmChannelListEntry* pEntry = m_listSockets;
        while (pEntry != NULL)
        {
          CASocket* pSocket = pEntry->pSocket;
          if (pSocket->getLocalPort() == lastMixToProxyConnectionSrcPort &&
            pSocket->getPeerPort() == lastMixToProxyConnectionDstPort)
          { //Ports match --> check IPs
            UINT8 ip[4];
            if (pSocket->getPeerIP(ip) == E_SUCCESS && memcmp(ip, lastMixToProxyConnectionDstIP,4) == 0)
            {
              if (pSocket->getLocalIP(ip) == E_SUCCESS && memcmp(ip, lastMixToProxyConnectionSrcIP,4) == 0)
              {
                channel = pEntry->channelIn;
                pEntry->bIsCrime = true;
                m_pMutex->unlock();
                return E_SUCCESS;
              }
            }
          }
          pEntry = pEntry->list_Sockets.next;
        }
        m_pMutex->unlock();
        return E_UNKNOWN;
      }
#endif
      lmChannelListEntry* getFirstSocket()
        {
          if(m_listSockets!=NULL)
            m_listSocketsNext=m_listSockets->list_Sockets.next;
          else
            m_listSocketsNext=NULL;
          return m_listSockets;
        }
      
      lmChannelListEntry* getNextSocket()
        {
          lmChannelListEntry* akt=m_listSocketsNext;
          if(m_listSocketsNext!=NULL)
            m_listSocketsNext=m_listSocketsNext->list_Sockets.next;
          return akt;
        }
 
//      SINT32 removeChannel(CASocket* pSocket);
      SINT32 removeChannel(HCHANNEL channelIn);
      UINT32 getSize(){return m_nChannels;}   
      static SINT32 test();
 
    private:
      UINT32 m_nChannels; //Number of channels in list
      LP_lmChannelListEntry* m_HashTable;
      
      lmChannelList* m_listSockets;
      lmChannelList* m_listSocketsNext;
#ifdef LOG_CRIME
      CAMutex* m_pMutex;
#endif
      #ifdef DELAY_CHANNELS
        UINT32** m_pDelayBuckets;
        CAThread* m_pThreadDelayBucketsLoop;
        CAMutex* m_pMutexDelayChannel;
        bool m_bDelayBucketsLoopRun;
        friend THREAD_RETURN lml_loopDelayBuckets(void*);
        //Parameters
        volatile UINT32 m_u32DelayChannelUnlimitTraffic;  //how much traffic without any delay?
        volatile UINT32 m_u32DelayChannelBucketGrow; //how many bytes to put in each bucket per time intervall
        volatile UINT32 m_u32DelayChannelBucketGrowIntervall; //duration of one time intervall in ms
                                                              //therefore the allowed bandwith=BucketGrow/Intervall*1000 [bytes/s]
        public:
          void setDelayParameters(UINT32 unlimitTraffic,UINT32 bucketGrow,UINT32 intervall);
          void reduceDelayBuckets(UINT32 delayBucketID, UINT32 amount);
          //bool hasDelayBuckets(UINT32 delayBucketID);
          //UINT32 getDelayBuckets(UINT32 delayBucketID);
      #endif
      #ifdef DELAY_CHANNELS_LATENCY
        //Parameters
        volatile UINT32 m_u32DelayChannelLatency;  //min latency in ms
        public:
          void setDelayLatencyParameters(UINT32 latency);                                                       
      #endif
  };
#endif
#endif //ONLY_LOCAL_PROXY