模仿数据链路层停等协议

对于一些初学网络的人，老师突然叫你编一个模拟停等协议的程序，可能很多人都会茫然，我也如此，但是通过几天的努力还是基本完成了任务，具体如下：此程序运行在.NETFRAMEWORK4.0以上，编译平台VS2010；程序界面如下：具体怎样设计取决与编程的人主要操作过程：方法1：先创建一个VisualStudio解决方案，再在里面添加两个Windows窗口应用程序作为发送方和接收方；方法2：直接创建两个Windows窗口应用程序作为发送方和接收方；程序代码如下：有的控件名称被修改过的所以不要直接复制要先修改控件名称程序有点乱，有的代码无用，但对程序没有多大影响发送方源代码：usingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.Text;usingSystem.Windows.Forms;usingSystem.Net.Sockets;//usingSystem.Net;//引用Socket套接字namespace发送方{publicpartialclassfmSender:Form{Socketsocket;//套接字实例stringIP;//保存主机ipintPort;//保存端口IPEndPointiep;intZhenCount;//保存分帧数privatestring[]ZuZhen()//组Á¨¦帧?函¡¥数ºy{try{//stringmessage="";intcount=0;intj=0;ZhenCount=Convert.ToInt32(txtCount.Text);if(txtMsg.Text.Length%ZhenCount==0){count=txtMsg.Text.Length/ZhenCount;}else{count=txtMsg.Text.Length/ZhenCount+1;}string[]msg=newstring[count];for(inti=0;i<txtMsg.Text.Length;i++){if(i==0){msg[j]+=txtMsg.Text[i];}elseif(i%ZhenCount==0){j++;msg[j]+=txtMsg.Text[i];}else{msg[j]+=txtMsg.Text[i];}}//按ã¡ä帧?数ºy分¤?出?来¤¡ä的Ì?字Á?符¤?数ºy组Á¨¦for(intk=1;k<=count;k++){if(k==count){msg[k-1]="DLESTX"+msg[k-1]+"DLEETX"+"0";//以°?0为a结¨¢束º?帧?}else{msg[k-1]="DLESTX"+msg[k-1]+"DLEETX"+k;}}//组Á¨¦帧?for(inti=0;i<msg.Length;i++){if(msg[i]=="DLE"){msg[i].Replace("DLE","DLEDLE");}//message+=msg[i]+"";}//returnmessage;returnmsg;}catch(Exceptionex){MessageBox.Show("组Á¨¦帧?出?错䨪！ê?","系¦Ì统ª3提¬¨¢示º?",MessageBoxButtons.OK,MessageBoxIcon.Information);string[]str=newstring[]{ex.Message};returnstr;}}privatevoidBeginSend()//发¤¡é送¨ª函¡¥数ºy{string[]str=ZuZhen();rtbSendMsg.AppendText("发¤¡é送¨ª信?息¡é：êo"+txtMsg.Text+""+DateTime.Now.ToString()+"\r\n");//下?为a传ä?输º?byte[]byteMessage;//出?现?异°¨¬常¡êfor(inti=0;i<str.Length;i++){socket=newSocket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);IPAddressserverIp=IPAddress.Parse(IP);intserverPort=Convert.ToInt32(Port);iep=newIPEndPoint(serverIp,serverPort);socket.Connect(iep);byteMessage=Encoding.ASCII.GetBytes(str[i]);socket.Send(byteMessage);socket.Shutdown(SocketShutdown.Both);socket.Close();}}publicfmSender(){InitializeComponent();}privatevoidtextBox2_TextChanged(objectsender,EventArgse){IP=txtIp.Text;}privatevoidfmSender_Load(objectsender,EventArgse){txtPort.Text="80";IPAddress[]ip=Dns.GetHostAddresses(Dns.GetHostName());txtIp.Text=ip[0].ToString();IP=txtIp.Text;Port=Convert.ToInt32(txtPort.Text);//获?取¨?本À?地Ì?主¡Â机¨²IPtxtCount.Text="2";//初?始º?帧?为a2}privatevoidbtnSend_Click(objectsender,EventArgse){try{BeginSend();txtMsg.Text="";}catch(Exceptionex){Console.WriteLine(ex.Message);}}privatevoidtxtPort_TextChanged(objectsender,EventArgse){Port=Convert.ToInt32(txtPort.Text);}privatevoidtxtCount_TextChanged(objectsender,EventArgse){ZhenCount=Convert.ToInt32(txtCount.Text);}privatevoidbutton1_Click(objectsender,EventArgse){rtbSendMsg.Clear();}}}接收方源代码：usingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.Text;usingSystem.Windows.Forms;usingSystem.Net.Sockets;usingSystem.Net;usingSystem.Threading;//引用线程namespace接收方{publicpartialclassForm1:Form{Threadmythread;stringIP;intPort;Socketsocket;IPEndPointiep;stringMessage;publicdelegatevoidmydeleget(Socketsocket);mydelegetmy=null;publicdelegatevoiddeleget1(inti);publicdelegatevoiddeleget2(stringstr);deleget1del1=null;deleget2del2=null;SocketnewSocket;intj=0;privatestringFenZhen(refstringend)//分帧函数{stringstr="";try{string[]msg=Message.Split(newChar[]{''});for(inti=0;i<msg.Length;i++){//richTextBox1.AppendText("第"+i+"帧:"+Zhen[i]+"\r\n");if(msg[i]=="DLEDLE"){msg[i].Replace("DLEDLE","DLE");}}str+=msg[2];end=msg[5];returnstr;}catch(Exceptionex){returnex.Message;}}//publicvoidGo(Socketsocket){inti=0;stringend1="-1";stringstr=null;stringsTime;stringmsg;byte[]byteMessage=newbyte[100];//存放接收到的信息try{while(true){/*newSocket.Receive(byteMessage);sTime=DateTime.Now.ToShortTimeString();msg=sTime+"-"+"信息来自：";Message=Encoding.Default.GetString(byteMessage).Trim(newchar[]{'\0'});//将接收到的信息转化为字符串//msg+=newSocket.RemoteEndPoint.ToString()+""+FenZhen();if(richTextBox1.InvokeRequired){my=newmydeleget(Go);this.Invoke(my,newobject[]{socket});}else{richTextBox1.AppendText("第"+i+"帧:"+Message+"\r\n");}str+=FenZhen(refend1);*/while(end1!="0"){i++;newSocket=socket.Accept();socket.Listen(5);newSocket.Receive(byteMessage);sTime=DateTime.Now.ToShortTimeString();msg=sTime+"-"+"信息来自：";Message=Encoding.Default.GetString(byteMessage).Trim(newchar[]{'\0'});//将接收到的信息转化为字符串//msg+=newSocket.RemoteEndPoint.ToString()+""+FenZhen();if(richTextBox1.InvokeRequired){//my=newmydeleget(Go);//this.Invoke(my,newobject[]{socket});del1=newdeleget1(f1);this.Invoke(del1,newobject[]{i});}else{richTextBox1.AppendText("第"+i+"帧:"+Message+"\r\n");}str+=FenZhen(refend1);}if(i!=0){if(richTextBox2.InvokeRequired){del2=newdeleget2(f2);this.Invoke(del2,newobject[]{str});}else{richTextBox2.AppendText("接收到的信息："+str+""+DateTime.Now.ToString()+"\r\n");}}i=0;end1="-1";str="";}}catch(Exceptionex){Console.WriteLine(ex.Message);}}publicvoidf1(inti){richTextBox1.AppendText("第"+i+"帧:"+Message+"\r\n");}publicvoidf2(stringstr){richTextBox2.AppendText("接收到的信息："+str+""+DateTime.Now.ToString()+"\r\n");}//publicvoidBeginListen()//开始侦听{Thread.Sleep(10);socket=newSocket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);IPAddressip1=IPAddress.Parse(IP);iep=newIPEndPoint(ip1,Port);toolStripLabel1.Text=iep.ToString()+"正在侦听...";socket.Bind(iep);socket.Listen(5);Go(socket);}/*if(richTextBox1.InvokeRequired){my=newmydeleget(BeginListen);this.Invoke(my);}else{richTextBox2.Append