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问题描述
此代码是对我之前的问题的一点改进..http://www.codeproject.com/Questions/448236/Monitoring-Network-Traffic
问题是，通过数据卡建立连接后(即当我使用调制解调器连接到Internet时)，我无法获得正确数量的发送和接收的数据包..
请帮帮我..
就像在控制面板下的网络连接中，状态显示了很多信息一样；如何在我的应用程序中获取它?
This code is a little progress to my previous question .. http://www.codeproject.com/Questions/448236/Monitoring-Network-Traffic
The problem is, I was not able to get the correct number of packets sent and received when the connection is established though my datacard (i.e. when I am connected to the internet usnig a modem)..
Kindly help me out..
Just like, in the network connections under control panel, the status shows so many info; how do I get it in my application?
using System;
using System.Runtime;
using System.Runtime.InteropServices;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.Net.NetworkInformation;
namespace NetworkTracer
{
public partial class Tracer : Form
{
private Timer _timer;
private DateTime _startTime = DateTime.MinValue;
private bool _isNetworkOnline;
IPGlobalProperties properties = IPGlobalProperties.GetIPGlobalProperties();
IPGlobalStatistics ipstat = null;
Decimal start_r_packets;
Decimal end_r_packets;
public Tracer()
{
// check if connection exist or not
InitializeComponent();
btnMonitor.Enabled = true;
btnCancel.Enabled = false;
_timer = new Timer();
_timer.Tick += new EventHandler(timerTicker);
}
protected void startMonitor(object sender, EventArgs e)
{
_startTime = DateTime.Now;
_timer.Start();
btnMonitor.Enabled = false;
btnCancel.Enabled = true;
ipstat = properties.GetIPv4GlobalStatistics();
getConnectionInfo();
}
[DllImport("wininet.dll")]
private extern static bool InternetGetConnectedState(out int Description, int ReservedValue);
public static bool IsConnectedToInternet()
{
int Desc;
return InternetGetConnectedState(out Desc, 0);
}
protected void getConnectionInfo()
{
try
{
string myHost = System.Net.Dns.GetHostName();
IPHostEntry ipEntry = System.Net.Dns.GetHostEntry(myHost);
IPAddress[] addr = ipEntry.AddressList;
NetworkChange.NetworkAvailabilityChanged += new NetworkAvailabilityChangedEventHandler(NetworkChange_NetworkAvailabilityChanged);
_isNetworkOnline = NetworkInterface.GetIsNetworkAvailable();
if (addr.Length > 0)
{
start_r_packets = Convert.ToDecimal(ipstat.ReceivedPackets);
start_r_packets = Math.Round(start_r_packets / 1048576 * 100000) / 100000;
//System.Net.NetworkInformation.
txtboxInfo.Text = "";
txtboxInfo.Text += "IP Address: " + addr[addr.Length - 1].ToString() + Environment.NewLine;
txtboxInfo.Text += Environment.NewLine + "Is Network Available: " + _isNetworkOnline.ToString() + Environment.NewLine;
txtboxInfo.Text += Environment.NewLine + "Starting Received Packets (in mb): " + start_r_packets.ToString() + Environment.NewLine;
txtboxInfo.Text += Environment.NewLine + "Is Network up: " + System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable().ToString() + Environment.NewLine;
txtboxInfo.Text += Environment.NewLine + "New method output: " + IsConnectedToInternet().ToString();
}
}
catch (Exception ex)
{
txtboxInfo.Text = "Error!" + Environment.NewLine + ex.Message.ToString();
_timer.Stop();
lblTime.Text = "";
btnCancel.Enabled = false;
btnMonitor.Enabled = false;
}
}
protected void NetworkChange_NetworkAvailabilityChanged(object sender, NetworkAvailabilityEventArgs e)
{
_isNetworkOnline = e.IsAvailable;
}
protected void closeEverything(object sender, EventArgs e)
{
_timer.Stop();
btnCancel.Enabled = false;
btnMonitor.Enabled = true;
txtboxInfo.Text = lblTime.Text + Environment.NewLine;
ipstat = properties.GetIPv4GlobalStatistics();
end_r_packets = Convert.ToDecimal(ipstat.ReceivedPackets);
end_r_packets = Math.Round(end_r_packets / 1048576 * 100000) / 100000;
txtboxInfo.Text += Environment.NewLine + "Starting Received Packets (in mb): " + start_r_packets.ToString() + Environment.NewLine;
txtboxInfo.Text += Environment.NewLine + "Ending Received Packets (in mb): " + end_r_packets.ToString() + Environment.NewLine;
end_r_packets = end_r_packets - start_r_packets;
txtboxInfo.Text += Environment.NewLine + "Total Received Packets (in mb): " + end_r_packets.ToString() + Environment.NewLine;
writetoFile();
}
protected void writetoFile()
{
string path_file = @"C:\\Documents and Settings\\user\\Desktop\\Test Tracer.txt";
string empty_line = "===============================================================";
if (System.IO.File.Exists(path_file))
{
System.IO.File.AppendAllText(path_file, empty_line + Environment.NewLine + "Connection opened: " + _startTime + Environment.NewLine + "Connection Closed: " + DateTime.Now.ToString() + Environment.NewLine + Environment.NewLine + txtboxInfo.Text + Environment.NewLine);
}
}
protected void timerTicker(object sender, EventArgs e)
{
var timeSinceStartTime = DateTime.Now - _startTime;
timeSinceStartTime = new TimeSpan(timeSinceStartTime.Hours,
timeSinceStartTime.Minutes,
timeSinceStartTime.Seconds);
lblTime.Text = "Time: " + timeSinceStartTime.ToString();
}
}
}
推荐答案
选中此项.
将Winpcap函数移植到.NET库的数据包嗅探 [ ^ ]
Check this.
Packet Sniffing with Winpcap Functions Ported to a .NET Library[^]
我发现这很有用.
http://social.msdn.microsoft.com/论坛/en-US/csharplanguage/thread/c3f3355f-b134-41fa-b93f-bb2b7f9c5855 [
I found this useful.
http://social.msdn.microsoft.com/Forums/en-US/csharplanguage/thread/c3f3355f-b134-41fa-b93f-bb2b7f9c5855[^]
如果您准备好研究现有的想法，请执行以下操作:
SharpPcap-.NET的数据包捕获框架 [ ^ ]
P调用了开源WinPCap，并创建了SharpPCap.尝试看看您是否可以获得任何好处或使您的代码更有效.
If you are ready to look at existing ideas:
SharpPcap - A Packet Capture Framework for .NET[^]
Open Source WinPCap is PInvoked and created SharpPCap. Try to see if you can gain anything or make your code more efficient.
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