stat.c

* A ncurses user interface. * Network statistics to view the amount of packets and data in many

/*

  This file is part of sniffer, a packet capture utility and
  network moniter
  The author can be contacted at <[e-mail]>
  the lastest version is avilable from 
  http://stev.org

  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.
*/

#include "config.h"
#include <stdio.h>
#include <string.h>
#include <time.h>

#include "stat.h"

struct gen_stat stat_global;

void init_stat(struct gen_stat *stat, char *title) {
	static char *str_bytes = "Bytes";

	/* just set every thing in the struct to 0 */
	bzero(stat, sizeof(struct gen_stat));
	stat->title = title;
	stat->last = time(NULL);
	stat->init = time(NULL);
	stat->messure = str_bytes;
	stat_process(stat); /* we need to set up our processing */
}

void stat_process(struct gen_stat *stat) {
	time_t t;
	time_t ctime;

	ctime = time(NULL);
	t = ctime - stat->last;

	stat->readable = stat->bytes;
	if (stat->readable > 100000) {
		stat->readable /= 1024;
		if (stat->readable > 100000) {
			stat->readable /= 1024;
			if (stat->readable > 10000) {
				stat->readable /= 1024;
				stat->messure = "GB";
			} else {
				stat->messure = "MB";
			}
		} else {
			stat->messure = "KB";
		}
	} else {
		stat->messure = "B";
	}

	if (t < 4) /* lets do it at a 4 second minimun */
		return;

	/* calculate all the rates */
	stat->rate_packets = (float) (stat->packets - stat->old_packets) / t;
	stat->rate_kb = (float) (stat->bytes - stat->old_bytes) / t / 1024;

	stat->avg_packets = (float) stat->packets / (ctime - stat->init);
	stat->avg_kb = (float) (stat->bytes / (ctime - stat->init)) / 1024;

	stat->old_packets = stat->packets;
	stat->old_bytes   = stat->bytes;
	stat->old_dropped = stat->dropped;

	/* set the last time this was done before we return */
	stat->last = time(NULL);
	return;
}