114 lines
5.4 KiB
C#
114 lines
5.4 KiB
C#
// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
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// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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// Copyright (C) LibreHardwareMonitor and Contributors.
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// All Rights Reserved.
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using System;
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using System.Diagnostics;
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using System.Net.NetworkInformation;
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namespace LibreHardwareMonitor.Hardware.Network
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{
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internal sealed class Network : Hardware
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{
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private readonly Sensor _dataDownloaded;
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private readonly Sensor _dataUploaded;
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private readonly Sensor _downloadSpeed;
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private readonly Sensor _networkUtilization;
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private readonly Sensor _uploadSpeed;
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private long _bytesDownloaded;
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private long _bytesUploaded;
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private long _lastTick;
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public Network(NetworkInterface networkInterface, ISettings settings)
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: base(networkInterface.Name, new Identifier("nic", networkInterface.Id), settings)
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{
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NetworkInterface = networkInterface;
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_dataUploaded = new Sensor("Data Uploaded", 2, SensorType.Data, this, settings);
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ActivateSensor(_dataUploaded);
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_dataDownloaded = new Sensor("Data Downloaded", 3, SensorType.Data, this, settings);
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ActivateSensor(_dataDownloaded);
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_uploadSpeed = new Sensor("Upload Speed", 7, SensorType.Throughput, this, settings);
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ActivateSensor(_uploadSpeed);
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_downloadSpeed = new Sensor("Download Speed", 8, SensorType.Throughput, this, settings);
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ActivateSensor(_downloadSpeed);
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_networkUtilization = new Sensor("Network Utilization", 1, SensorType.Load, this, settings);
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ActivateSensor(_networkUtilization);
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_bytesUploaded = NetworkInterface.GetIPStatistics().BytesSent;
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_bytesDownloaded = NetworkInterface.GetIPStatistics().BytesReceived;
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_lastTick = Stopwatch.GetTimestamp();
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}
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public override HardwareType HardwareType
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{
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get { return HardwareType.Network; }
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}
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internal NetworkInterface NetworkInterface { get; private set; }
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public override void Update()
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{
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try
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{
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if (NetworkInterface == null)
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return;
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long newTick = Stopwatch.GetTimestamp();
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double dt = new TimeSpan(newTick - _lastTick).TotalSeconds;
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IPv4InterfaceStatistics interfaceStats = NetworkInterface.GetIPv4Statistics();
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// Report out the number of GB (2^30 Bytes) that this interface has up/downloaded. Note
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// that these values can reset back at zero (eg: after waking from sleep).
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_dataUploaded.Value = (float)(interfaceStats.BytesSent / (double)0x40000000);
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_dataDownloaded.Value = (float)(interfaceStats.BytesReceived / (double)0x40000000);
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// Detect a reset in interface stats if the new total is less than what was previously
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// seen. While setting the previous values to zero doesn't encapsulate the value the
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// instant before the reset, it is the best approximation we have.
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if (interfaceStats.BytesSent < _bytesUploaded || interfaceStats.BytesReceived < _bytesDownloaded)
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{
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_bytesUploaded = 0;
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_bytesDownloaded = 0;
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}
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long dBytesUploaded = interfaceStats.BytesSent - _bytesUploaded;
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long dBytesDownloaded = interfaceStats.BytesReceived - _bytesDownloaded;
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// Upload and download speeds are reported as the number of bytes transfered over the
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// time difference since the last report. In this way, the values represent the average
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// number of bytes up/downloaded in a second.
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_uploadSpeed.Value = (float)(dBytesUploaded / dt);
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_downloadSpeed.Value = (float)(dBytesDownloaded / dt);
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// Network speed is in bits per second, so when calculating the load on the NIC we first
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// grab the total number of bits up/downloaded
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long dbits = (dBytesUploaded + dBytesDownloaded) * 8;
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// Converts the ratio of total bits transferred over time over theoretical max bits
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// transfer rate into a percentage load
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double load = (dbits / dt / NetworkInterface.Speed) * 100;
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// Finally clamp the value between 0% and 100% to avoid reporting nonsensical numbers
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_networkUtilization.Value = (float)Math.Min(Math.Max(load, 0), 100);
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// Store the recorded values and time, so they can be used in the next update
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_bytesUploaded = interfaceStats.BytesSent;
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_bytesDownloaded = interfaceStats.BytesReceived;
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_lastTick = newTick;
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}
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catch (NetworkInformationException networkInformationException) when (unchecked(networkInformationException.HResult == (int)0x80004005))
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{
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foreach (NetworkInterface networkInterface in NetworkInterface.GetAllNetworkInterfaces())
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{
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if (networkInterface.Id.Equals(NetworkInterface?.Id))
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{
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NetworkInterface = networkInterface;
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break;
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}
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}
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}
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}
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}
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}
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