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。