public string extern int MessageBox (int hWnd,String text,-CSDN社区

第7章：1. 结构体结构体定义、访问、传参，结构体对齐（offsetof宏、contaner_of宏），结构体内嵌函数指针，程序分层，模块化等。2. 共用体共用体与结构体的异同、共用体的作用、共用体举例3. 枚举第8章：自动类型转换、大小端序、typedef、编译器优化、extern C、程序调试、变参函数、dowhile(0)、内嵌汇编、调试版与发行版、断言

要改协议，，高手帮下忙。。在线等。
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Messaging;
using System.Net.Sockets;
using System.Text;
using System.Runtime.InteropServices;
using System.IO;
using System.Threading ;
using System.Net;

namespace GprsServer
{
///

/// Form1 的摘要说明。
///

public class GprsServer : System.Windows.Forms.Form
{
///

/// 必需的设计器变量。
///

/// 清理所有正在使用的资源。
///

private void menuItem1_Click(object sender,System.EventArgs e)
{
//
}
private void menuItem2_Click(object sender,System.EventArgs e)
{
this.Close();
Application.Exit();
}
private void notifyIcon_DBClick(object sender, System.EventArgs e)
{
//
}

protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
notifyIcon.Visible =false;;
notifyIcon.Icon=null;
notifyIcon.Dispose();
m_Icon1.Dispose();
m_Icon2.Dispose();
m_Icon3.Dispose();
}
base.Dispose( disposing );
}

#region Windows 窗体设计器生成的代码
///

/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
///

/// 应用程序的主入口点。
///

[STAThread]
static void Main()
{
Application.Run(new GprsServer());
}

private byte Get_CheckXor(ref byte[] temp,int len)
{
byte A=0;
for(int i=0;i {
A^=temp[i];
}
return A;
}

private void ReadTcpMsg() //读取用户发送的指令数据
{
byte[] buff= new byte[2048];
string CartIpAddress="";//车辆的IP地址
EndPoint TempRemote = null;

int recv = 0;
byte[] Tbuff;
byte[] AllBuff;
int iLenght=0;
int iIndex=0;
int iLen=0;
int iXorValue=0;

while(true)
{
try
{
recv=TcpSocket.Receive(buff,0,TcpSocket.Available,SocketFlags.None);//读取数据内容
if (recv==0)
{
recv=TcpSocket.Receive(buff,0,TcpSocket.Available,SocketFlags.None);//读取数据内容
if (recv==0)
{
TcpSocket.Close();
break;
}
}

}
catch
{
break;
}

AllBuff=new byte[recv +TcpBuff.Length];
for (iIndex = 1; iIndex <=TcpBuff.Length; iIndex++)
{
AllBuff[iIndex-1]=TcpBuff[iIndex-1];
}

for (iIndex = 1; iIndex <=recv; iIndex++)
{
AllBuff[TcpBuff.Length+iIndex-1]=buff[iIndex-1];
}

for (iIndex = 1; iIndex <=AllBuff.Length; iIndex++)
{
iLenght=AllBuff.Length-iIndex+1;
if (iLenght<6)//检测数据包长度
{
//不完整，则将指令保存
if (iLenght>0)
{
TcpBuff=new byte[iLenght];
for (iLen = 1; iLen <=iLenght; iLen++)
{
TcpBuff[iLen-1]=AllBuff[iLen+iIndex-2];
}
}
break;
}
else
{
//检测当前指令是否是完整的指令,查找数据包头
if (AllBuff[iIndex-1]==0x29 & AllBuff[iIndex]==0x29)
{
if ((AllBuff.Length -iIndex)>=(AllBuff[iIndex+2]*256+ AllBuff[iIndex+3]+4))
{
//检测当前指令是否是完整的指令
if ((AllBuff[AllBuff[iIndex+2]*256+ AllBuff[iIndex+3]+iIndex+3])==0x0D)
{
//在接收的数据中获取单条完整的指令数据
Tbuff=new byte[AllBuff[iIndex+2]*256+ AllBuff[iIndex+3]+5];
for (iLen = 1; iLen <=Tbuff.Length; iLen++)
{
Tbuff[iLen-1]=AllBuff[iLen+iIndex-2];
}
iXorValue=Get_CheckXor(ref Tbuff,Tbuff.Length-2);
if(iXorValue!=Tbuff[Tbuff.Length-2])
{
//校验不合格，继续查找合法指令数据
continue;
}
else
{
if (bTsFlag)
{
string BuffToStr="";
for(int i=0;i {
BuffToStr+=Tbuff[i].ToString("X2")+" ";
}
ShowSysMsg(BuffToStr,2);
}
//获取车载终端手机号
CartIpAddress=Tbuff[5]+"." +Tbuff[6] +"."+Tbuff[7] +"."+Tbuff[8];
TempRemote=(EndPoint)CarID_RemoteIP_Hash[CartIpAddress];
if( TempRemote==null)
{
if (bTsFlag)
{
ShowSysMsg("无法查找到接收数据的远程终节点!",3);
}
}
else
{
try
{
socket.SendTo(Tbuff,TempRemote);
if (bTsFlag)
{
ShowSysMsg("数据成功转发到车载终端!",1);
}
}
catch
{
if (bTsFlag)
{
ShowSysMsg("数据转发到车载终端失败!",3);
}
}
}
iIndex=iIndex+Tbuff.Length-1;
TcpBuff=new byte[1];
}
}
else
{
continue;
}
}
else
{
if ((AllBuff[iIndex+2]*256+ AllBuff[iIndex+3]+4)>1024)
{
continue;
}
else
{
//不完整，则将指令保存
if (iLenght>0)
{
TcpBuff=new byte[iLenght];
for (iLen = 1; iLen <=iLenght; iLen++)
{
TcpBuff[iLen-1]=AllBuff[iLen+iIndex-2];
}
break;
}
else
{
TcpBuff=new byte[1];
break;
}

}
}
}
else
{
continue;
}
}//检测数据包长度
}
}
}

public void ShowSysMsg(string sNote,int iIcon)
{
//显示系统消息
try
{
lvwMsg.BeginUpdate();
if (lvwMsg.Items.Count >100)
lvwMsg.Items.Clear();
ListViewItem li = new ListViewItem();
//li.SubItems[0].Text =sNote ;
li.SubItems.Add (sNote);
li.ImageIndex=iIcon;
lvwMsg.Items.Add(li);
lvwMsg.EndUpdate();
}
catch
{}
}

private void ReadUdp() //从UDP数据端口读取GPRS数据
{
byte[] buff = new byte[1024];
int recv = 0;
byte[] Tbuff;
byte[] AllBuff;
int iLenght=0;
int iIndex=0;
int iLen=0;
int iXorValue=0;
string CarIpAddress="";
byte[] RecvAffirmBuff=new byte[]{0x29,0x29,0x21,0x00,0x05,0,0,0,0,0x0D};//回应终端数组

IPEndPoint ipep = new IPEndPoint(IPAddress.Any ,LocaPort);
//socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
try
{
socket.Bind(ipep);
ShowSysMsg("系统成功在"+LocaPort + "端口侦听!",6);
}
catch
{
ShowSysMsg("端口"+LocaPort+"已被占用，系统侦听失败!",5);
return;
}
IPEndPoint sender = new IPEndPoint(IPAddress.Any , 0);//指远程终端（终节点）Ip地址对象 IPAddress.Any表示任何地址 0 表示任何端口
EndPoint remote = (EndPoint)(sender); //指远程终端（终节点）

while(true)
{
try
{
recv = socket.ReceiveFrom(buff , ref remote);
}
catch
{
ShowSysMsg("接收车载终端数据错误!",3);
}
//---------------------you2004-12-31 begin------------------------------//
AllBuff=new byte[recv +TempBuff.Length];
for (iIndex = 1; iIndex <=TempBuff.Length; iIndex++)
{
AllBuff[iIndex-1]=TempBuff[iIndex-1];
}

for (iIndex = 1; iIndex <=recv; iIndex++)
{
AllBuff[TempBuff.Length+iIndex-1]=buff[iIndex-1];
}

for (iIndex = 1; iIndex <=AllBuff.Length; iIndex++)
{
iLenght=AllBuff.Length-iIndex+1;
if (iLenght<6)//检测数据包长度
{
//不完整，则将指令保存
if (iLenght>0)
{
TempBuff=new byte[iLenght];
for (iLen = 1; iLen <=iLenght; iLen++)
{
TempBuff[iLen-1]=AllBuff[iLen+iIndex-2];
}
}
break;
}
else
{
//检测当前指令是否是完整的指令,查找数据包头
if (AllBuff[iIndex-1]==0x29 & AllBuff[iIndex]==0x29)
{
if ((AllBuff.Length -iIndex)>=(AllBuff[iIndex+2]*256+ AllBuff[iIndex+3]+4))
{
//检测当前指令是否是完整的指令
if ((AllBuff[AllBuff[iIndex+2]*256+ AllBuff[iIndex+3]+iIndex+3])==0x0D)
{
//在接收的数据中获取单条完整的指令数据
Tbuff=new byte[AllBuff[iIndex+2]*256+ AllBuff[iIndex+3]+5];
for (iLen = 1; iLen <=Tbuff.Length; iLen++)
{
Tbuff[iLen-1]=AllBuff[iLen+iIndex-2];
}
iXorValue=Get_CheckXor(ref Tbuff,Tbuff.Length-2);
if(iXorValue!=Tbuff[Tbuff.Length-2])
{
//校验不合格，继续查找合法指令数据
continue;
}
else
{
if (bTsFlag)
{
string BuffToStr="";
for(int i=0;i {
BuffToStr+=Tbuff[i].ToString("X2")+" ";
}
ShowSysMsg(BuffToStr,0);
}

//获取车载终端手机号
CarIpAddress=Tbuff[5]+"." +Tbuff[6] +"."+Tbuff[7] +"."+Tbuff[8];

//-----------------检测系统哈希表是否包含此终端数据---------------------\\
if(CarID_RemoteIP_Hash.ContainsKey(CarIpAddress))
{
CarID_RemoteIP_Hash[CarIpAddress]=remote;//有更新
}
else
{
CarID_RemoteIP_Hash.Add(CarIpAddress,remote);//没有添加
}

//--------------------将数据转发到中心处理程序-----------------\\
if (TcpSocket.Connected)
{
try
{
TcpSocket.Send(Tbuff,0,Tbuff.Length,SocketFlags.None);
if (bTsFlag)
{
ShowSysMsg("数据成功转发到网络中心处理程序!",1);
}
}
catch
{
if (bTsFlag)
{
ShowSysMsg("数据转发到网络中心处理程序失败!",3);
}
}
}
//-------------------向终端发出0x21的接收确认-------------------\\
RecvAffirmBuff[5]=Tbuff[Tbuff.Length-2];
RecvAffirmBuff[6]=Tbuff[2];
RecvAffirmBuff[7]=Tbuff[9];
RecvAffirmBuff[8]=Get_CheckXor(ref RecvAffirmBuff,8);
socket.SendTo(RecvAffirmBuff,remote);
iIndex=iIndex+Tbuff.Length-1;
TempBuff=new byte[1];
}
}
else
{
continue;
}
}
else
{
if ((AllBuff[iIndex+2]*256+ AllBuff[iIndex+3]+4)>1024)
{
continue;
}
else
{
//不完整，则将指令保存
if (iLenght>0)
{
TempBuff=new byte[iLenght];
for (iLen = 1; iLen <=iLenght; iLen++)
{
TempBuff[iLen-1]=AllBuff[iLen+iIndex-2];
}
break;
}
else
{
TempBuff=new byte[1];
break;
}

}
}
}
else
{
continue;
}
}//检测数据包长度

}
//---------------------you2004-12-31 end------------------------------//
}

}

private void GprsServer_Load(object sender, System.EventArgs e)
{
//
}

int I=0;
private void TimerIcon_Tick(object sender, System.EventArgs e)
{
if(thGprs!=null)
{
if(thGprs.IsAlive)
notifyIcon.Icon=notifyIcon.Icon==m_Icon1?m_Icon2:m_Icon1;
else
notifyIcon.Icon=notifyIcon.Icon==m_Icon1?m_Icon3:m_Icon1;
}
I++;
if(I>5)
{
I=FindWindow(null,@sCompanyName);
if( I!= 0)
{
SendMessage(I,0x501,1002,"");
}
I=0;
}
}

private void TimerConn_Tick(object sender, System.EventArgs e)
{
if (!TcpSocket.Connected)
{
try
{
lblInfo.Text ="与中心数据处理程序断开，正在进行二次连接...";
IPHostEntry IPHost = Dns.Resolve(RemoteIp);
string []aliases = IPHost.Aliases;
IPAddress []addr = IPHost.AddressList;
EndPoint ep = new IPEndPoint(addr[0],RemotePort);
TcpSocket = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
TcpSocket.Connect(ep);

thTcpMsg = new Thread ( new ThreadStart(ReadTcpMsg)) ;
//启动线程
thTcpMsg.IsBackground =true;
thTcpMsg.Start( ) ;
lblInfo.Text ="系统运行正常，正在中转GPRS数据...";
}
catch
{
return;
}
}
}

private void checkBox1_CheckedChanged(object sender, System.EventArgs e)
{
bTsFlag=checkBox1.Checked;
}

private void cmdExit_Click(object sender, System.EventArgs e)
{
if(MessageBox.Show("确定关闭中继服务器？", "提示",MessageBoxButtons.YesNo,MessageBoxIcon.Information) == DialogResult.Yes)
{
Application.Exit ();
}
}

private void cmdSet_Click(object sender, System.EventArgs e)
{
frmUdpSet frmudpset=new frmUdpSet();
frmudpset.Show();
}

protected override void OnClosing(CancelEventArgs e)
{
e.Cancel =true;
this.WindowState =FormWindowState.Minimized;
}
}
}