boinc/client/net_stats.h

// Berkeley Open Infrastructure for Network Computing
// http://boinc.berkeley.edu
// Copyright (C) 2005 University of California
//
// This is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation;
// either version 2.1 of the License, or (at your option) any later version.
//
// This software 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 Lesser General Public License for more details.
//
// To view the GNU Lesser General Public License visit
// http://www.gnu.org/copyleft/lesser.html
// or write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

// keep track of the network performance of this host,
// namely exponentially weighted averages of upload and download speeds
//

#ifndef _NET_STATS_
#define _NET_STATS_

#ifndef _WIN32
#include <cstdio>
#endif

#include "net_xfer.h"
#include "miofile.h"

// there's one of these each for upload and download
//
struct NET_INFO {
    double delta_t;         // elapsed time of file transfer activity
                            // in this session of client
    double delta_nbytes;    // bytes transferred in this session
    double last_bytes;
    double starting_throughput; // throughput at start of session

    void update(double dt, double nb, bool active);
    double throughput();
};

class NET_STATS {
public:
    double last_time;
    NET_INFO up;
    NET_INFO down;

    NET_STATS();
    void poll(NET_XFER_SET&);

    int write(MIOFILE&);
    int parse(MIOFILE&);
};

#endif