TCP 侦听器和套接字的区别 [英] Difference between TCP Listener and Socket

问题描述

据我所知，我可以同时使用 TCPListener 和 Socket 来创建服务器，那么它们之间有什么区别?

As far as I know I can create a server using both TCPListener and Socket, so what is the difference between the two of them?

插座

private Socket MainSock;
MainSock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
MainSock.Bind(new IPEndPoint(IPAddress.Any, port));
MainSock.Listen(500);
MainSock.BeginAccept(AcceptConnections, new Wrapper());

TCPListener

    Int32 port = 13000;
    IPAddress localAddr = IPAddress.Parse("127.0.0.1");
    TcpListener server = new TcpListener(localAddr, port);
    server.Start();

我真的很困惑.两者都监听连接，那么它们之间有什么区别?

I'm really confused. The two of them listen for connections, so what is the difference between them?

更新代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.Net.Sockets;
using System.Net.Security;
using System.Security.Authentication;
using System.Security.Cryptography.X509Certificates;
using System.IO;

public class Wrapper
{
    public byte[] buffer;
    public SslStream sslStream;
    public object connector;
}

public class Sock
{
    private Dictionary<string, byte> Connections;
    public event Action<Wrapper> AnnounceNewConnection;
    public event Action<Wrapper> AnnounceDisconnection;
    public event Action<byte[], Wrapper> AnnounceReceive;
    private Socket _sock;

    private X509Certificate certificate = X509Certificate.CreateFromCertFile("exportedcertificate.cer");

    public Sock(int port)
    {
        try
        {
            Connections = new Dictionary<string, byte>();
            _sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            _sock.Bind(new IPEndPoint(IPAddress.Any, port));
            _sock.Listen(500);
            _sock.BeginAccept(AcceptConnections, new Wrapper());
        }
        catch (Exception e)
        {
            Console.WriteLine(e);
        }
    }

    private void AcceptConnections(IAsyncResult result)
    {
        Wrapper wr = (Wrapper)result.AsyncState;
        try
        {
            wr.sslStream = new SslStream(new NetworkStream(_sock.EndAccept(result), true));
            wr.sslStream.BeginAuthenticateAsServer(certificate, AcceptAuthenticate, wr);

            _sock.BeginAccept(AcceptConnections, new Wrapper());
        }
        catch (Exception e) { Console.WriteLine(e); }
    }

    private void AcceptAuthenticate(IAsyncResult result)
    {
        Wrapper wr = (Wrapper)result.AsyncState;
        try
        {
            wr.sslStream.EndAuthenticateAsServer(result);
            if (wr.sslStream.IsAuthenticated == true)
            {
                AnnounceNewConnection.Invoke(wr);
            }
        }
        catch (Exception e) { Console.WriteLine(e); }
    }

    private void ReceiveData(IAsyncResult result)
    {
        Wrapper wr = (Wrapper)result.AsyncState;
        try
        {
            AnnounceReceive.Invoke(wr.buffer, wr);
        }
        catch (Exception e) { Console.WriteLine(e); AnnounceDisconnection.Invoke(wr); }
    }
}

推荐答案

它们只是做同一件事的不同类，编写在不同的级别.在幕后，TCPListener 无疑会调用与您的第一个基于 Socket 的代码非常相似的东西.它只是为了让您远离一些血腥细节.

They're just different classes that do the same thing, written at different levels. Under the hood the TCPListener undoubtedly calls something very like your first Socket-based code. It;s just there to hide you from some of the gory details.

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