c# socket 实现多端口通信
基本思路是：
1》服务端监听（用一个公用的端口接收连接的请求如：6666）。 2》客户机请求连接端口为6666 3》服务器接受请求然后再监听一个新的端口，再把这个端口发送给客户机。
4》客户机接到发来的端口，再重新连接服务器此端口。5》服务器保存每一个连接的客户机。
服务端s代码如下
using System; |
using System.Collections.Generic; |
using System.ComponentModel; |
using System.Data; |
using System.Drawing; |
using System.Linq; |
using System.Text; |
using System.Windows.Forms; |
using System.Net.Sockets; |
using System.Net; |
using System.Collections; |
using System.Threading; |
|
namespace 多端口服务端 |
{ |
public partial class Form1 : Form |
{ |
public Form1() |
{ |
InitializeComponent(); |
slist = aa => |
{ |
listBox1.Items.Add(aa); |
}; |
} |
private int localPort = 6666; |
private delegate void SetListBoxCallBack(string str); |
private SetListBoxCallBack slist; |
private static int PID = 6667; |
private static ArrayList clientList = new ArrayList(); |
private void button1_Click(object sender, EventArgs e) |
{ |
AcceptConnection(); |
} |
//开始监听的回调函数 |
private void AcceptConnection() |
{ |
try |
{ |
Socket mainSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); |
IPEndPoint localEP = new IPEndPoint(IPAddress.Any, localPort); |
// 将 Socket 绑定到本地的终结点上 |
mainSocket.Bind(localEP); |
// 开始侦听，最大的连接数是 50 |
mainSocket.Listen(50); |
mainSocket.BeginAccept(new AsyncCallback(AcceptCallBack), mainSocket); |
} |
catch (Exception ex) |
{ |
MessageBox.Show(ex.Message); |
} |
} |
//接收连接的回调函数 |
private void AcceptCallBack(IAsyncResult iar) |
{ |
try |
{ |
Socket mainSocket = (Socket)iar.AsyncState; |
// 调用EndAccept完成BeginAccept异步调用，返回一个新的Socket处理与客户的通信 |
Socket workerSocket = mainSocket.EndAccept(iar); |
|
if (mainSocket.LocalEndPoint.ToString().IndexOf("6666") != -1) |
{ |
int NewPid = PID++; |
localPort = NewPid; |
AcceptConnection(); |
SendData(System.Text.Encoding.Default.GetBytes("PID|" + NewPid), workerSocket); |
} |
else |
{ |
//存储客户端sokect |
clientList.Add(workerSocket); |
listBox1.Invoke(slist, workerSocket.RemoteEndPoint.ToString()); |
} |
mainSocket.BeginAccept(new AsyncCallback(AcceptCallBack), mainSocket); |
} |
catch (Exception ex) |
{ |
throw; |
} |
} |
public void SendData(byte[] buffer, Socket workerSocket) |
{ |
try |
{ |
int left = buffer.Length; |
int sndLen = 0; |
workerSocket.BeginSend(buffer, sndLen, left, SocketFlags.None, new AsyncCallback(SendCallBack), workerSocket); |
} |
catch (SocketException ex) |
{ |
MessageBox.Show(ex.Message); |
} |
} |
private void SendCallBack(IAsyncResult iar) |
{ |
Socket workerSocket = (Socket)iar.AsyncState; |
workerSocket.EndSend(iar); |
} |
|
private void button2_Click(object sender, EventArgs e) |
{ |
byte[] buffer=System.Text.Encoding.Default.GetBytes("mesg|"+textBox1.Text); |
int snLen=0; |
listBox2.Items.Add(textBox1.Text); |
while(true) |
for (int i = 0; i < clientList.Count; i++) |
{ |
int k = i; |
Thread aa = new Thread(new ThreadStart(()=> |
{ |
((Socket)clientList[k]).BeginSend(buffer, snLen, buffer.Length, SocketFlags.None, new AsyncCallback(SendCallBack), ((Socket)clientList[k])); |
})); |
aa.IsBackground = true; |
aa.Start(); |
} |
} |
} |
} |
客户端代码： |
<PRE class=brush:csharp;gutter:false;>using System; |
using System.Collections.Generic; |
using System.ComponentModel; |
using System.Data; |
using System.Drawing; |
using System.Linq; |
using System.Text; |
using System.Windows.Forms; |
using System.Net; |
using System.Net.Sockets; |
|
namespace 多端口客户端 |
{ |
public partial class Form1 : Form |
{ |
public Form1() |
{ |
InitializeComponent(); |
label = (text,la) => |
{ |
la.Text = text; |
}; |
slist = aa => |
{ |
listBox1.Items.Add(aa); |
}; |
} |
private int serverPort = 6666; |
public byte[] dataBuffer = new byte[10000000]; |
private Socket client; |
private delegate void setLabel(string text,Label la); |
private setLabel label; |
private delegate void SetListBoxCallBack(string str); |
private SetListBoxCallBack slist; |
private void button1_Click(object sender, EventArgs e) |
{ |
ServerConnection(); |
} |
//连接服务器 |
private void ServerConnection() |
{ |
try |
{ |
IPEndPoint ipEndPoint = new IPEndPoint(IPAddress.Parse("192.169.1.113"), serverPort); |
client = new Socket(ipEndPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp); |
client.Connect(ipEndPoint); |
label1.Invoke(label, client.RemoteEndPoint.ToString(),label1); |
label2.Invoke(label, client.LocalEndPoint.ToString(), label2); |
client.BeginReceive(dataBuffer, 0, dataBuffer.Length, SocketFlags.None, new AsyncCallback(RecieveCallBack), client); |
} |
catch (Exception ex) |
{ |
throw; |
} |
|
} |
//回调接收函数 |
private void RecieveCallBack(IAsyncResult iar) |
{ |
Socket socketData = (Socket)iar.AsyncState; |
int iRx = socketData.EndReceive(iar); |
string revStr = System.Text.Encoding.Default.GetString(dataBuffer, 0, iRx); |
string[] str = revStr.Split('|'); |
if (str[0] == "PID") |
{ |
serverPort =Convert.ToInt32(str[1]); |
ServerConnection(); |
} |
if (str[0] == "mesg") |
{ |
listBox1.Invoke(slist, str[1]); |
socketData.BeginReceive(dataBuffer, 0, dataBuffer.Length, SocketFlags.None, new AsyncCallback(RecieveCallBack), socketData); |
} |
|
} |
} |
} |
|
</PRE> |
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