roundtriptimepinger.h

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// ##########################################################################
// ####                                                                  ####
// ####                      RTP Audio Server Project                    ####
// ####                    ============================                  ####
// ####                                                                  ####
// #### Round Trip Time Pinger                                           ####
// ####                                                                  ####
// #### Version 1.00  --  February 16, 2001                              ####
// ####                                                                  ####
// #### Copyright (C) 1999  Thomas Dreibholz                             ####
// ####               2000  Universität Bonn, Abt. IV                    ####
// ####               2001  EMail: dreibh@iem.uni-due.de                 ####
// ####                     WWW:   https://www.uni-due.de/~be0001        ####
// ####                                                                  ####
// ##########################################################################


#ifndef ROUNDTRIPTIMEPINGER_H
#define ROUNDTRIPTIMEPINGER_H


#include "system.h"
#include "socket.h"
#include "internetaddress.h"
#include "timedthread.h"
#include "rtppacket.h"
#include "pingerhost.h"
#include "randomizer.h"


#include <multiset.h>
#include <algo.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#include <netinet/icmp6.h>
#include <sys/time.h>
#include <fstream.h>


namespace Coral {


class RoundTripTimePinger : public TimedThread
{
   // ====== Constructor ===================================================
   public:
   RoundTripTimePinger(Socket*      ping4socket,
                       Socket*      ping6socket,
                       const card64 delay = 1000000);

   ~RoundTripTimePinger();


   // ====== Status functions ===============================================
   inline bool ready() const;

   inline cardinal getHosts();


   inline double getAlpha();

   inline void setAlpha(const double alpha);


   inline card64 getMaxPingDelay();

   inline void setMaxPingDelay(const card64 delay);


   cardinal getRoundTripTime(const InternetAddress& address,
                             const card8            trafficClass = 0x00);


   // ====== Adding/removing hosts ==========================================
   bool addHost(const InternetAddress& address,
                const card8            trafficClass = 0x00);

   void removeHost(const InternetAddress& address,
                   const card8            trafficClass = 0x00);

   // ====== GNUplot output generator =======================================
   void activateLogger(ostream*    scriptStream,
                       ostream*    dataStream,
                       const char* dataName);

   void deactivateLogger();

   inline bool isLogging() const;

   void writeGPHeader(ostream&       os,
                      const char*    dataName,
                      const cardinal lineStyle = 1);

   void writeGPData(ostream& os);


   // ====== Output operator ================================================
   friend ostream& operator<<(ostream& os, RoundTripTimePinger& pinger);


   // ====== Constants ======================================================
   static const cardinal MaxRoundTripTime = 180000000;

   static const double UnreachableFactor = 2.0;

   static const card64 MinUnreachableAsumption = 2500000;


   // ====== Private data ===================================================
   private:
   void timerEvent();
   void calculateRoundTripTime(const InternetAddress& address,
                               const card8            trafficClass,
                               const card64           sendTime,
                               const card64           arrivalTime);
   card16 RoundTripTimePinger::calculateChecksum(const card16*  addr,
                                                 const cardinal length,
                                                 card16         csum);
   card64 RoundTripTimePinger::sendPing4(const InternetAddress& destination,
                                         const card8            trafficClass,
                                         const card16           sequenceNumber);
   card64 RoundTripTimePinger::sendPing6(const InternetAddress& destination,
                                         const card8            trafficClass,
                                         const card16           sequenceNumber);
   bool receiveEcho4();
   bool receiveEcho6();
   void checkUnreachable(PingerHost& host);


   struct Ping4Packet
   {
      icmphdr Header;
      card64  TimeStamp;
   };

   struct Ping6Packet
   {
      icmp6_hdr Header;
      card64    TimeStamp;
   };


   Socket*              Ping4Socket;
   Socket*              Ping6Socket;
   double               RoundTripTimeAlpha;
   multiset<PingerHost> HostSet;
   card64               GPHeaderTimeStamp;
   bool                 Ready;
   bool                 Logger;
   ostream*             LoggerScriptStream;
   ostream*             LoggerDataStream;
   card64               MaxPingDelay;
   Randomizer           Random;
};


}


#include "roundtriptimepinger.icc"


#endif