/***************************************************************************
 * PacketStats.h -- The PacketStats class handles packet statistics. It is *
 * intended to keep track of the number of packets and bytes sent and      *
 * received, keep track of start and finish times, etc.                    *
 *                                                                         *
 ***********************IMPORTANT NMAP LICENSE TERMS************************
 *                                                                         *
 * The Nmap Security Scanner is (C) 1996-2012 Insecure.Com LLC. Nmap is    *
 * also a registered trademark of Insecure.Com LLC.  This program is free  *
 * software; you may redistribute and/or modify it under the terms of the  *
 * GNU General Public License as published by the Free Software            *
 * Foundation; Version 2 with the clarifications and exceptions described  *
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 * technology into proprietary software, we sell alternative licenses      *
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 * license Nmap technology such as host discovery, port scanning, OS       *
 * detection, version detection, and the Nmap Scripting Engine.            *
 *                                                                         *
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 *   not derivative works.)                                                *
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 *                                                                         *
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 *                                                                         *
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 * have been found so far).                                                *
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 *                                                                         *
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 * included with Nmap.                                                     *
 *                                                                         *
 ***************************************************************************/
#ifndef __STATS_H__
#define __STATS_H__ 1

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include "nping.h"

#ifdef WIN32
#include "mswin32\winclude.h"
#else
#include <sys/types.h>

#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif

#include <sys/mman.h>
#include "nping_config.h"
#endif

#if HAVE_UNISTD_H
#include <unistd.h>
#endif

#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
#  include <sys/time.h>
# else
#  include <time.h>
# endif
#endif

/* Make sure we define a 64bit integer type */
#ifndef u64_t
    #if WIN32
      typedef unsigned __int64 u64_t;
    #else
      typedef unsigned long long u64_t;
    #endif
#endif

/* Timeval subtraction in microseconds */
#define TIMEVAL_SUBTRACT(a,b) (((a).tv_sec - (b).tv_sec) * 1000000 + (a).tv_usec - (b).tv_usec)
/* Timeval subtract in milliseconds */
#define TIMEVAL_MSEC_SUBTRACT(a,b) ((((a).tv_sec - (b).tv_sec) * 1000) + ((a).tv_usec - (b).tv_usec) / 1000)
/* Timeval subtract in seconds; truncate towards zero */
#define TIMEVAL_SEC_SUBTRACT(a,b) ((a).tv_sec - (b).tv_sec + (((a).tv_usec < (b).tv_usec) ? - 1 : 0))


class NpingTimer {

  private:
    struct timeval start_tv;
    struct timeval stop_tv;

  public:
    NpingTimer();
    ~NpingTimer();
    void reset();
    int start();
    int stop();
    double elapsed(struct timeval *now=NULL);
    bool is_started();
    bool is_stopped();
    

  private:
      bool timeval_set(const struct timeval *tv);
};


class NpingStats {

  private:
    u64_t packets_sent;
    u64_t packets_received;
    u64_t packets_echoed;

    u64_t bytes_sent;
    u64_t bytes_received;
    u64_t bytes_echoed;

    u32 echo_clients_served;

    NpingTimer tx_timer;  /* Timer for packet transmission.         */
    NpingTimer rx_timer;  /* Timer for packet reception.            */
    NpingTimer run_timer; /* Timer to measure Nping execution time. */

 public:
    NpingStats();
    ~NpingStats();

    void reset();

    int addSentPacket(u32 len);
    int addRecvPacket(u32 len);
    int addEchoedPacket(u32 len);
    int addEchoClientServed();

    int startClocks();
    int stopClocks();

    int startTxClock();
    int stopTxClock();

    int startRxClock();
    int stopRxClock();
    
    int startRuntime();
    int stopRuntime();

    double elapsedTx();
    double elapsedRx();
    double elapsedRuntime(struct timeval *now=NULL);

    u64_t getSentPackets();
    u64_t getSentBytes();

    u64_t getRecvPackets();
    u64_t getRecvBytes();

    u64_t getEchoedPackets();
    u64_t getEchoedBytes();
    u32 getEchoClientsServed();

    u64_t getLostPackets();
    double getLostPacketPercentage();
    double getLostPacketPercentage100();

    u64_t getUnmatchedPackets();
    double getUnmatchedPacketPercentage();
    double getUnmatchedPacketPercentage100();

    double getOverallTxPacketRate();
    double getOverallTxByteRate();

    double getOverallRxPacketRate();
    double getOverallRxByteRate();

};


#endif /* __STATS_H__ */