
/***************************************************************************
 * 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************************
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 * The Nmap Security Scanner is (C) 1996-2010 Insecure.Com LLC. Nmap is    *
 * also a registered trademark of Insecure.Com LLC.  This program is free  *
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 * included with Nmap.                                                     *
 *                                                                         *
 ***************************************************************************/
#ifndef STATS_H
#define STATS_H

#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





/*****************************************************************************
 * Copied from timing.h
 *****************************************************************************/

 #define DEFAULT_CURRENT_RATE_HISTORY 5.0


/* This class measures current and lifetime average rates for some quantity. */
class RateMeter {
  public:
    RateMeter(double current_rate_history = DEFAULT_CURRENT_RATE_HISTORY);

    void start(const struct timeval *now = NULL);
    void stop(const struct timeval *now = NULL);
    void update(double amount, const struct timeval *now = NULL);
    double getOverallRate(const struct timeval *now = NULL) const;
    double getCurrentRate(const struct timeval *now = NULL, bool update = true);
    double getTotal(void) const;
    double elapsedTime(const struct timeval *now = NULL) const;

  private:
    /* How many seconds to look back when calculating the "current" rates. */
    double current_rate_history;

    /* When this meter started recording. */
    struct timeval start_tv;
    /* When this meter stopped recording. */
    struct timeval stop_tv;
    /* The last time the current sample rates were updated. */
    struct timeval last_update_tv;

    double total;
    double current_rate;

    static bool isSet(const struct timeval *tv);
};

/* A specialization of RateMeter that measures packet and byte rates. */
class PacketRateMeter {
  public:
    PacketRateMeter(double current_rate_history = DEFAULT_CURRENT_RATE_HISTORY);

    void start(const struct timeval *now = NULL);
    void stop(const struct timeval *now = NULL);
    void update(u32 len, const struct timeval *now = NULL);
    double getOverallPacketRate(const struct timeval *now = NULL) const;
    double getCurrentPacketRate(const struct timeval *now = NULL, bool update = true);
    double getOverallByteRate(const struct timeval *now = NULL) const;
    double getCurrentByteRate(const struct timeval *now = NULL, bool update =true);
    unsigned long long getNumPackets(void) const;
    unsigned long long getNumBytes(void) const;
    double elapsedTime(void) const;
  private:
    RateMeter packet_rate_meter;
    RateMeter byte_rate_meter;
};




class PacketStats {

 public:

    PacketStats();
    ~PacketStats();

    int addSentPacket(unsigned len);
    int addRecvPacket(unsigned len);

    int startClock();
    int stopTxClock();
    int stopRxClock();

    bool isClockStopped();

    PacketRateMeter timer_sent;
    PacketRateMeter timer_recv;
    
    u64_t getSentPackets();
    u64_t getSentBytes();
    u64_t getRecvPackets();
    u64_t getRecvBytes();
    u64_t getLostPackets();
    double getLostPacketPercentage();
    double getLostPacketPercentage100();
    void displayStats();


 private:

    u64_t sendPackets;
    u64_t sendBytes;
    u64_t recvPackets;
    u64_t recvBytes;
    	
    bool isstopped;
    bool isstopped_tx; /* Tx */
    bool isstopped_rx; /* Rx */
};



/*****************************************************************************
 * Copied from utils.h
 *****************************************************************************/
/* 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))

/* assign one timeval to another timeval plus some msecs: a = b + msecs */
#define TIMEVAL_MSEC_ADD(a, b, msecs) { (a).tv_sec = (b).tv_sec + ((msecs) / 1000); (a).tv_usec = (b).tv_usec + ((msecs) % 1000) * 1000; (a).tv_sec += (a).tv_usec / 1000000; (a).tv_usec %= 1000000; }
#define TIMEVAL_ADD(a, b, usecs) { (a).tv_sec = (b).tv_sec + ((usecs) / 1000000); (a).tv_usec = (b).tv_usec + ((usecs) % 1000000); (a).tv_sec += (a).tv_usec / 1000000; (a).tv_usec %= 1000000; }

/* Find our if one timeval is before or after another, avoiding the integer
   overflow that can result when doing a TIMEVAL_SUBTRACT on two widely spaced
   timevals. */
#define TIMEVAL_BEFORE(a, b) (((a).tv_sec < (b).tv_sec) || ((a).tv_sec == (b).tv_sec && (a).tv_usec < (b).tv_usec))
#define TIMEVAL_AFTER(a, b) (((a).tv_sec > (b).tv_sec) || ((a).tv_sec == (b).tv_sec && (a).tv_usec > (b).tv_usec))

#endif
