/* EtherApe
 * Copyright (C) 2001 Juan Toledo, Riccardo Ghetta
 * $Id: traffic_stats.h,v 1.5 2006/04/30 07:25:14 bchiara Exp $
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifndef TRAFFIC_STATS_H
#define TRAFFIC_STATS_H

#include "protocols.h"

struct timeval substract_times (struct timeval a, struct timeval b);

typedef struct
{
  gdouble average;		/* Average bytes in or out in the last x ms */
  gdouble aver_accu;		/* Accumulated bytes in the last x ms */
  gdouble accumulated;		/* Accumulated bytes */
  gdouble accu_packets;         /* Accumulated number of packets */
  struct timeval last_time;	/* Timestamp of the last packet added */
}
basic_stats_t;
void basic_stats_reset(basic_stats_t *tf_stat); /* resets counters */
void basic_stats_add(basic_stats_t *tf_stat, gdouble val); 
void basic_stats_sub(basic_stats_t *tf_stat, gdouble val); 
void basic_stats_avg(basic_stats_t *tf_stat, gdouble avg_usecs);
void basic_stats_dump(basic_stats_t *tf_stat, FILE *fout);


typedef struct
{
  GList *pkt_list;              /* list of packet_list_item_t - private */
  gdouble n_packets;		/* Number of packets in the list */
  basic_stats_t stats;        /* total traffic stats */
  basic_stats_t stats_in;     /* inbound traffic stats */
  basic_stats_t stats_out;    /* outbound traffic stats */
  protostack_t stats_protos;    /* protocol stack */
}
traffic_stats_t;

void traffic_stats_init(traffic_stats_t *pkt_stat); /* initializes counters */
void traffic_stats_reset(traffic_stats_t *pkt_stat); /* releases memory */
void traffic_stats_add_packet( traffic_stats_t *pkt_stat, 
                              packet_info_t *new_pkt, 
                              packet_direction dir); /* adds a packet */
void traffic_stats_purge_expired_packets(traffic_stats_t *pkt_stat, double pkt_expire_time, double proto_expire_time);
gboolean traffic_stats_update(traffic_stats_t *pkt_stat, double pkt_expire_time, double proto_expire_time);

#endif