如何使用C#或Java发送SYN数据包

using System;
using System.Net.Sockets;

class Program
{
    static void Main()
    {
        // 创建Socket对象
        Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

        try
        {
            // 设置目标主机的IP地址和端口号
            socket.Connect("目标主机IP地址", 目标主机端口号);

            // 创建并发送SYN数据包
            byte[] synPacket = new byte[1] { 0x02 };
            socket.Send(synPacket);

            Console.WriteLine("SYN数据包发送成功！");
        }
        catch (Exception ex)
        {
            Console.WriteLine("发送SYN数据包时出现错误：" + ex.Message);
        }
        finally
        {
            // 关闭Socket连接
            socket.Close();
        }
    }
}