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C#中使用WinPcap进行流量分析

c#
小樊
88
2024-08-23 16:23:31
栏目: 编程语言

使用WinPcap(Windows Packet Capture)库可以实现在C#中进行流量分析。以下是一个简单的示例代码,用于捕获网络流量并分析其中的数据包:

using System;
using System.Threading;
using PcapDotNet.Core;
using PcapDotNet.Packets;

class Program
{
    static void Main(string[] args)
    {
        // Retrieve the device list
        IList<LivePacketDevice> allDevices = LivePacketDevice.AllLocalMachine;

        if (allDevices.Count == 0)
        {
            Console.WriteLine("No interfaces found! Make sure WinPcap is installed.");
            return;
        }

        // Select the device for capture
        LivePacketDevice selectedDevice = allDevices[0];

        // Open the device
        using (PacketCommunicator communicator = selectedDevice.Open(65536, PacketDeviceOpenAttributes.Promiscuous, 1000))
        {
            // Start the capture loop
            communicator.ReceivePackets(0, PacketHandler);
        }
    }

    private static void PacketHandler(Packet packet)
    {
        // Print packet information
        Console.WriteLine(packet.Timestamp.ToString("yyyy-MM-dd HH:mm:ss.fff") + " length:" + packet.Length);
        
        // Parse the packet
        EthernetDatagram ethernet = packet.Ethernet;
        if (ethernet.EtherType == EthernetType.IpV4)
        {
            IpV4Datagram ip = ethernet.IpV4;
            Console.WriteLine("Source IP: " + ip.Source + " Destination IP: " + ip.Destination);
        }
        else if (ethernet.EtherType == EthernetType.Arp)
        {
            ArpDatagram arp = ethernet.Arp;
            Console.WriteLine("ARP: Sender IP: " + arp.SenderProtocolIpV4Address + " Target IP: " + arp.TargetProtocolIpV4Address);
        }
    }
}

在上面的示例中,我们首先获取本地机器上的所有网络设备列表,然后选择第一个设备进行网络流量捕获。随后,通过打开所选设备并设置捕获参数,我们可以使用ReceivePackets()方法来开始捕获网络数据包。在PacketHandler方法中,我们可以对捕获到的数据包进行分析和处理。

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