IP地址操作类
IPAddress类
在该类中有一个Parse()方法，可以把点分的十进制IP转化成IPAddress类
示例：
IPAddress address = IPAddress.Parse(192.168.0.1);
IPEndPoint类
IPEndPoint其实就是一个IP地址和端口的绑定，可以代表一个服务，用来Socket通讯
TCP的Scoket编程，主要分两部分：
一、服务端Socket侦听：
- 创建IPEndPoint实例，用于Socket侦听时绑定；
IPEndPoint ipep = new IPEndPoint(IPAddress.Any, 6001);
- 创建套接字实例
serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
这里创建的时候用ProtocolType.Tcp，表示建立一个面向连接（TCP）的Socket。
- 将所创建的套接字与IPEndPoint绑定
serverSocket.Bind(ipep);
- 设置套接字为接听模式
serverSocket.Listen(10);
通过以上四步，我们已经建立了Socket的侦听模式，下面我们就来设置怎么样获取客户Socket连接的实例，以及连接后的信息发送。
在套接字上接收接入的连接
在套接字上接受客户端发送的信息和发送信息
二、服务端Socket侦听：
- 创建IPEndPoint实例和套接字
IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 6001);
clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
- 将套接字连接到远程服务器
try{
clientSocket.Connect(ipep)；
}
catch(SocketException ex)
{
MessageBox.Show("connect error:" + ex.Message;)
return;
}
- 接受消息
while (true)
{
int bufLen = 0;
try
{
bufLen = clientSocket.Available;
clientSocket.Receive(data, 0, bufLen, SocketFlags.None);
if (bufLen == 0)
{
continue;
}
}
catch (Exception ex)
{ MessageBox.Show("Receive Error:" + ex.Message);
return;
}
string clientcommand = System.Text.Encoding.ASCII.GetString(data).Substring(0, bufLen);
lstClient.Items.Add(clientcommand);
- 发送信息
byte[] data = new byte[1024];
data = Encoding.ASCII.GetBytes(txtClient.Text);
clientSocket.Send(data, data.Length, SocketFlags.None);
代码示例：
类 Serv
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
namespace 网络连接池
{
public class Serv
{
public Socket listenfd;
public Conn[] conns;//新建连接池数组
public int maxConn = 50;//最大连接数
public int NewIndex()
{
if (conns == null)
return -1;//连接池数组为空时，返回负1
for (int i = 0; i < conns.Length ; i++)
{
if (conns[i] == null)
{
conns[i] = new Conn();//连接池数组当前位置为空时，新建一个连接池对象
return i;//返回值为conns数组的index
}
else if (conns[i].isUse == false)
{
return i;//如果当前连接池位置没有被使用时，且不为空时，返回conns数组的index
}
}
return -1;
}
public void Start(string host, int port)
{
conns = new Conn[maxConn];//新建连接池数组，最大连接数为maxConn
for (int i = 0; i < maxConn; i++)
{
conns[i] = new Conn();
}//新建50个连接池
listenfd = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPAddress ipAdr = IPAddress.Parse(host);
IPEndPoint ipEp = new IPEndPoint(ipAdr, port);
listenfd.Bind(ipEp);
listenfd.Listen(maxConn);
listenfd.BeginAccept(AcceptCb, null);
Console.WriteLine("服务器启动成功");
}
private void AcceptCb(IAsyncResult ar)
{
try
{
Socket socket = listenfd.EndAccept(ar);
int index = NewIndex();
if (index < 0)
{
socket.Close();
Console.Write("警告链接已满");
}
else
{
Conn conn = conns[index];
conn.Init(socket);
string adr = conn.GetAdress();
Console.WriteLine("客户端链接[" + adr + "]conn池ID:" + index);
conn.socket.BeginReceive(conn.readBuff, conn.buffCount, conn.BuffRemain(), SocketFlags.None, ReceiveCb, conn);
}
listenfd.BeginAccept(AcceptCb, null);
}
catch (Exception e)
{
Console.WriteLine("AcceptCb失败:" + e.Message);
}
}
private 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() + "]断开链接");
conn.Close();
return;
}
string str = System.Text.Encoding.UTF8.GetString(conn.readBuff, 0, count);
Console.WriteLine("收到[" + conn.GetAdress() + "]数据：" + str);
str = conn.GetAdress() + ":" + str;
byte[] bytes = System.Text.Encoding.UTF8.GetBytes(str);
for (int i = 0; i < conns.Length; i++)
{
if (conns[i] == null)
continue;
if (!conns[i].isUse)
continue;
Console.WriteLine("将消息传播给" + conns[i].GetAdress());
conns[i].socket.Send(bytes);
}
conn.socket.BeginReceive(conn.readBuff, conn.buffCount, conn.BuffRemain(), SocketFlags.None, ReceiveCb,
conn);
}
catch (Exception e)
{
Console.WriteLine("收到["+conn.GetAdress() +"]断开链接");
conn.Close();
}
}
}
}
Conn类
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Sockets;
using System.Runtime.Remoting.Messaging;
using System.Text;
using System.Threading.Tasks;
namespace 网络连接池
{
public class Conn
{
public const int BUFFER_SIZE = 1024;
public Socket socket;
public bool isUse = false;
public byte[] readBuff ;
public int buffCount = 0;
public Conn()
{
readBuff = new byte[BUFFER_SIZE];
}
///
/// 初始化socket
///
///
public void Init(Socket socket)
{
this.socket = socket;
isUse = true;
buffCount = 0;
}
public int BuffRemain()
{
return BUFFER_SIZE - buffCount;
}
///
/// 获取连接点的IP地址
///
///
/// 断开链接
///
public void Close()
{
if (!isUse)
return;
Console.WriteLine("[断开链接]"+GetAdress());
socket.Close();
isUse = false;
}
}
}
Main方法
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace 网络连接池
{
class Program
{
public static void Main(string[] args)
{
Console.WriteLine("Hello World!");
Serv serv = new Serv();
serv.Start("127.0.0.1",1234);
while (true)
{
string str = Console.ReadLine();
switch (str)
{
case"quit":
return;
}
}
}
}
}
异步客户端脚本示例
using UnityEngine;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Net;
using System.Net.Mime;
using System.Net.Sockets;
using UnityEngine.UI;
public class netAsyn : MonoBehaviour
{
//服务器IP和端口
public InputField hostInput;
public InputField portInput;
//显示客户端收到的消息
public MediaTypeNames.Text recvText;
public string recvStr;
//显示客户端IP和端口
public MediaTypeNames.Text clientText;
//聊天输入框
public InputField textInput;
//Socket和接收缓冲区
Socket socket;
const int BUFFER_SIZE = 1024;
public byte[] readBuff = new byte[BUFFER_SIZE];
//因为只有主线程能够修改UI组件属性
//因此在Update里更换文本
void Update()
{
recvText.text = recvStr;
}
//连接
public void Connetion()
{
//清理text
recvText.text = "";
//Socket
socket = new Socket(AddressFamily.InterNetwork,
SocketType.Stream, ProtocolType.Tcp);
//Connect
string host = hostInput.text;
int port = int.Parse(portInput.text);
socket.Connect(host, port);
clientText.text = "客户端地址 " + socket.LocalEndPoint.ToString();
//Recv
socket.BeginReceive(readBuff, 0, BUFFER_SIZE, SocketFlags.None, ReceiveCb, null);
}
//接收回调
private void ReceiveCb(IAsyncResult ar)
{
try
{
//count是接收数据的大小
int count = socket.EndReceive(ar);
//数据处理
string str = System.Text.Encoding.UTF8.GetString(readBuff, 0, count);
if (recvStr.Length > 300) recvStr = "";
recvStr += str + "\n";
//继续接收
socket.BeginReceive(readBuff, 0, BUFFER_SIZE, SocketFlags.None, ReceiveCb, null);
}
catch (Exception e)
{
recvText.text += "链接已断开";
socket.Close();
}
}
//发送数据
public void Send()
{
string str = textInput.text;
byte[] bytes = System.Text.Encoding.Default.GetBytes(str);
try
{
socket.Send(bytes);
}
catch { }
}
}