//
//  Copyright (c) 1994, 1995 by Mike Romberg ( romberg@fsl.noaa.gov )
//
//  NetBSD port:
//  Copyright (c) 1995, 1996, 1997-2002 by Brian Grayson (bgrayson@netbsd.org)
//
//  This file was written by Brian Grayson for the NetBSD and xosview
//    projects.
//  This file may be distributed under terms of the GPL or of the BSD
//    license, whichever you choose.  The full license notices are
//    contained in the files COPYING.GPL and COPYING.BSD, which you
//    should have received.  If not, contact one of the xosview
//    authors for a copy.
//

#include "netmeter.h"
#include "kernel.h"
#include <stdlib.h>
#include <err.h>


NetMeter::NetMeter( XOSView *parent, double max )
	: FieldMeterGraph( parent, 3, "NET", "IN/OUT/IDLE" ) {
	if (!BSDNetInit()) {
		warnx("The kernel does not seem to have the symbols needed for the NetMeter.");
		warnx("The NetMeter has been disabled.");
		disableMeter ();
	}
	else {
		total_ = netBandwidth_ = max;
		lastBytesIn_ = lastBytesOut_ = 0;
		netIface_ = "False";
		ignored_ = false;
		BSDGetNetInOut(&lastBytesIn_, &lastBytesOut_, netIface_.c_str(), ignored_);
		IntervalTimerStart();
	}
}

NetMeter::~NetMeter( void ) {
}

void NetMeter::checkResources( void ) {
	FieldMeterGraph::checkResources();

	setfieldcolor( 0, parent_->getResource("netInColor") );
	setfieldcolor( 1, parent_->getResource("netOutColor") );
	setfieldcolor( 2, parent_->getResource("netBackground") );
	priority_ = atoi( parent_->getResource("netPriority") );
	dodecay_ = parent_->isResourceTrue("netDecay");
	useGraph_ = parent_->isResourceTrue("netGraph");
	SetUsedFormat( parent_->getResource("netUsedFormat") );
	netIface_ = parent_->getResource("netIface");
	if (netIface_[0] == '-') {
		ignored_ = true;
		netIface_.erase(0, netIface_.find_first_not_of("- "));
	}
}

void NetMeter::checkevent( void ) {
	getstats();
	drawfields();
}

void NetMeter::getstats(void) {
	//  Reset total_ to expected maximum.  If it is too low, it
	//  will be adjusted in adjust().  bgrayson
	total_ = netBandwidth_;
	fields_[0] = fields_[1] = 0;
	uint64_t nowBytesIn, nowBytesOut;

	IntervalTimerStop();
	BSDGetNetInOut(&nowBytesIn, &nowBytesOut, netIface_.c_str(), ignored_);
	double t = (1.0) / IntervalTimeInSecs();
	IntervalTimerStart();

	fields_[0] = (double)(nowBytesIn - lastBytesIn_) * t;
	lastBytesIn_ = nowBytesIn;
	fields_[1] = (double)(nowBytesOut - lastBytesOut_) * t;
	lastBytesOut_ = nowBytesOut;

	if (total_ < (fields_[0] + fields_[1]))
		total_ = fields_[0] + fields_[1];
	fields_[2] = total_ - fields_[0] - fields_[1];
	/*  The fields_ values have already been scaled into bytes/sec by
	 *  the manipulations (* t) above.  */
	setUsed(fields_[0] + fields_[1], total_);
}