/*****************************************************************************
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All rights reserved.

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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.

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  above copyright notice, this list of conditions
  and the following disclaimer in the documentation
  and/or other materials provided with the distribution.

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  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,
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*****************************************************************************/

/*****************************************************************************
written by
   Yunhong Gu, last updated 07/22/2007
*****************************************************************************/

#ifndef _UDT_CONTROL_H_
#define _UDT_CONTROL_H_

#include "udt.h"
#include "common.h"
#include <set>
#include <map>


class CUDT;

struct CHistoryBlock
{
   uint32_t m_IP[4];
   int m_iIPversion;
   uint64_t m_ullTimeStamp;
   int m_iRTT;
   int m_iBandwidth;
   int m_iLossRate;
   int m_iReorderDistance;
};

struct CIPComp
{
   bool operator()(const CHistoryBlock* hb1, const CHistoryBlock* hb2) const;
};

struct CTSComp
{
   bool operator()(const CHistoryBlock* hb1, const CHistoryBlock* hb2) const;
};

class CHistory
{
public:
   CHistory();
   CHistory(const unsigned int& size);
   ~CHistory();

public:
   void update(const sockaddr* addr, const int& ver, const int& rtt, const int& bw);
   void update(const CHistoryBlock* hb);
   int lookup(const sockaddr* addr, const int& ver, CHistoryBlock* hb);

private:
   void convert(const sockaddr* addr, const int& ver, uint32_t* ip);

private:
   unsigned int m_uiSize;
   std::set<CHistoryBlock*, CIPComp> m_sIPIndex;
   std::set<CHistoryBlock*, CTSComp> m_sTSIndex;

   pthread_mutex_t m_Lock;
};

struct CUDTComp
{
   bool operator()(const CUDT* u1, const CUDT* u2) const;
};

class CControl
{
public:
   CControl();
   ~CControl();

public:
   int join(CUDT* udt, const sockaddr* addr, const int& ver, int& rtt, int& bw);
   void leave(CUDT* udt, const int& rtt, const int& bw);

private:
   CHistory* m_pHistoryRecord;
   std::map<CHistoryBlock*, std::set<CUDT*, CUDTComp>, CIPComp> m_mControlBlock;
   std::map<CUDT*, CHistoryBlock*, CUDTComp> m_mUDTIndex;

   pthread_mutex_t m_Lock;
};

#endif