前言
初步接触了Socket,现使其与Unity相结合，做成一个简单的客户端之间可以互相发送消息的一个Test。下面话不多说了，来一起看看详细的介绍吧。
方法如下：
首先，是服务端的代码。
创建一个连接池，用于存储客户端的数量。
using System;
using System.Net;
using System.Net.Sockets;
using System.Collections;
using System.Collections.Generic;
namespace Server
{
/// <summary>
/// 对象池
/// </summary>
public class Conn
{
//常量，用于表示传输的字节最大数量，最大接收的字节数
public const int buffer_Size = 1024;
//Socket
public Socket socket;
//是否连接
public bool isUse = false;
//传输数组，用来存储接受到的数据
public byte[] readBuff = new byte[buffer_Size];
public int buffCount = 0;
/// <summary>
/// 构造函数
/// </summary>
public Conn()
{
readBuff = new byte[buffer_Size];
}
/// <summary>
/// 初始化
/// </summary>
/// <param name="socket"></param>
public void Init(Socket socket)
{
this.socket = socket;
isUse = true;
buffCount = 0;
}
/// <summary>
/// 缓冲区剩下的字节数
/// </summary>
/// <returns></returns>
public int BuffRemain()
{
return buffer_Size - buffCount;
}
/// <summary>
/// 获得客户端地址
/// </summary>
/// <returns></returns>
public string GetAdress()
{
if (!isUse)
{
return "无法获得地址";
}
else
{
return socket.RemoteEndPoint.ToString();
}
}
/// <summary>
/// 关闭连接
/// </summary>
public void Close()
{
if (!isUse)
{
return;
}
else
{
Console.WriteLine("断开连接" + GetAdress());
socket.Close();
isUse = false;
}
}
}
}
对象池创建完成后，需要在创建一个连接类，用来维护客户端的连接。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;
namespace Server
{
class Serv
{
//监听套接字
public Socket listenfd;
//客户端链接
public Conn[] conns;
//最大的连接数量
public int maxConn = 50;
//获取链接池索引，返回负数表示获取失败
public int NewIndex()
{
if(conns==null)
{
return -1;
}
for (int i = 0; i < conns.Length;i++ )
{
if(conns[i]==null)
{
conns[i] = new Conn();
return i;
}else if(conns[i].isUse==false)
{
return i;
}
}
return -1;
}
//开启一个服务器
public void Start(string host,int port)
{
conns = new Conn[maxConn];
for (int i = 0; i < maxConn;i++ )
{
conns[i] = new Conn();
}
listenfd = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPAddress ipAdr = IPAddress.Parse(host);
IPEndPoint ipEp = new IPEndPoint(ipAdr, port);
//与一个本地终结点相关联
listenfd.Bind(ipEp);
//监听
listenfd.Listen(maxConn);
listenfd.BeginAccept(AcceptCb, listenfd);
}
//AcceptCb回调
public void AcceptCb(IAsyncResult ar)
{
try
{
Socket sSocket = ar.AsyncState as Socket;
Socket socket = sSocket.EndAccept(ar);
int index = NewIndex();
if(index<0)
{
socket.Close();
Console.WriteLine("连接已满");
}
else
{
Conn conn = conns[index];
conn.Init(socket);
string adr = conn.GetAdress();
Console.WriteLine("客户端连接[" + adr + "Conn池ID: " + index);
conn.socket.BeginReceive(conn.readBuff, conn.buffCount, conn.BuffRemain(), SocketFlags.None, ReceiveCb, conn);
}
listenfd.BeginAccept(AcceptCb, listenfd);
}catch(SocketException ex)
{
Console.WriteLine(ex);
}
}
//ReceiveCb回调
public void ReceiveCb(IAsyncResult ar)
{
Conn conn = (Conn)ar.AsyncState;
try
{
int count = conn.socket.EndReceive(ar);
if(count<=0)
{
Console.WriteLine("收到：" + conn.GetAdress() + "断开连接");
conn.Close();
return;
}
string str = Encoding.UTF8.GetString(conn.readBuff,0,count);
Console.WriteLine("接收到[" + conn.GetAdress() + "]数据" + str);
byte[] bytes = Encoding.UTF8.GetBytes(str);
for (int i = 0; i < conns.Length;i++ )
{
if(conns[i]==null)
continue;
if (!conns[i].isUse)
continue;
Console.WriteLine("将消息传送给" + conns[i].GetAdress());
conns[i].socket.Send(bytes);
}
conn.socket.BeginReceive(conn.readBuff, conn.buffCount, conn.BuffRemain(), SocketFlags.None,ReceiveCb, conn);
}
catch(SocketException ex)
{
Console.WriteLine(ex);
Console.WriteLine("收到：" + conn.GetAdress() + "断开连接");
conn.Close();
}
}
}
}
