用vc6.0编服务器与客户机互相传送消息的程序-杂项

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用vc6.0编服务器与客户机互相传送消息的程序

发布时间：2008-11-20 点击：来源：本站原创录入者：佚名

用vc6.0编服务器与客户机互相传送消息的程序

---- 南京理工大学朱晓华

---- 网络编程已经成为一种时髦，以TCP/IP协议的网络更为流行.自己编一个服务器与客户机互相传送消息的程序,以便增加自己网络编程的经验.下面我就介绍一下我编的程序.

---- 首先介绍服务器程序：

---- 1.创建一个名为"server"的项目,单文档界面.

---- 2.在serverview.h中加入代码：

#include "winsock.h"

  添加变量：

CSize sizeTotal;//控制滚动条

intcount;//信息条数

CString m_data[1000];//信息存放

char    Hostname[260];

char Hostaddress[20];//主机IP地址

SOCKET m_sock;

HANDLE m_hListenThread;//线程

BOOL m_bInitialized;//是否初始化

WSADATAWSAData;

BOOL flag;

SOCKADDR_IN saClnt;

int saClntLen;

BOOL Isconnect;//是否连接

---- 3.在serverview.cpp中重载CServerView()构造器,创建并绑定嵌套字：

CServerView::CServerView()

{

// TODO: add construction code here

Isconnect=FALSE;

flag=FALSE;

sizeTotal.cy=350;

sizeTotal.cx=300;

m_hListenThread;

count=5;

int status;

WSADATA wsaData;

m_data[0]="initializing Windows Sockets DLL....";

if((status=WSAStartup(0x0101,&wsaData))==0)

{

m_data[0]+="Succeeded";

m_bInitialized=TRUE;

}

else

{

m_bInitialized=FALSE;

}

m_sock=socket(AF_INET,SOCK_DGRAM,0);

m_data[1]="Creating socket....";

if(m_sock==INVALID_SOCKET)

{

m_data[1]+="Failed";

}

m_data[1]+="Succeeded";

m_data[2]="Binding socket....";

sockaddr_in sa;

sa.sin_family=AF_INET;

sa.sin_addr.S_un.S_addr=htonl(INADDR_ANY);

sa.sin_port=htons(5050);

if(bind(m_sock,(PSOCKADDR)&sa,sizeof

(sa))==SOCKET_ERROR)

{

m_data[2]+="Failed";

closesocket(m_sock);

}

m_data[2]+="Succeeded";

m_data[3]="Creating listener thread....";

unsigned long idThread;

m_hListenThread=CreateThread(NULL,0,

(LPTHREAD_START_ROUTINE)Listen,(void *)

this,0,&idThread);

if(m_hListenThread)

{m_data[3]+="Succeeded";

m_data[4]+="Listening....";

}

else

m_data[4]+="Failed";



}

---- 4.在析构函数中完成必需的清除操作:

CServerView::~CServerView()

{

if(m_bInitialized)

WSACleanup();

closesocket(m_sock);

if(m_hListenThread)

::TerminateThread(m_hListenThread,0);

}

---- 5.定义接收和处理消息的线程:

long WINAPI Listen(CServerView *pView)

{



char msg[2000]="";

intnchar;

SOCKADDR_IN saClnt;

int saClntLen;

while(1)

{

saClntLen=sizeof(saClnt);

nchar=recvfrom(pView->m_sock,msg,1024,0,

(PSOCKADDR)&saClnt,&saClntLen);

if(nchar<0) { pView->m_data[pView->count++]+

="Error in recvfrom\n";

pView->InvalidateRect(NULL);

}

else

{



switch(msg[0])

{

case'A':

wsprintf(msg,"A: Client from %s

 attached\n",inet_ntoa(saClnt.sin_addr));

pView->m_data[pView->count++]=msg;

pView->flag=TRUE;

pView->InvalidateRect(NULL);

pView->Isconnect=TRUE;

pView->saClnt=saClnt;

pView->saClntLen=saClntLen;

sendto(pView->m_sock,msg,1024,0,

(PSOCKADDR)&saClnt,saClntLen);

break;



case 'D':

wsprintf(msg,"D: Client form %s 

detached\n",inet_ntoa(saClnt.sin_addr));

pView->m_data[pView->count++]=msg;

pView->flag=TRUE;

pView->InvalidateRect(NULL);

pView->Isconnect=FALSE;

sendto(pView->m_sock,msg,1024,0,

(PSOCKADDR)&saClnt,saClntLen);

break;





case 'R':

saClntLen=sizeof(saClnt);

pView->m_data[pView->count++]=msg;

pView->flag=TRUE;

pView->InvalidateRect(NULL);

break;



default:

break;

}





}



}

return(0);

}

---- 6.在程序菜单项中添加"本机IP地址":

void CServerView::OnIp() 

{



int WSAReturn;

WSAReturn=WSAStartup( 0x0101, &WSAData );

if( WSAReturn == 0 ){

gethostname( Hostname, 260 );

struct hostent *pHostEnt;

pHostEnt = gethostbyname( Hostname);

if( pHostEnt != NULL ){

wsprintf( Hostaddress, "%d.%d.%d.%d",

( pHostEnt->h_addr_list[0][0] & 0x00ff ),

( pHostEnt->h_addr_list[0][1] & 0x00ff ),

( pHostEnt->h_addr_list[0][2] & 0x00ff ),

( pHostEnt->h_addr_list[0][3] & 0x00ff ) );

CString out;

out.Format(Hostaddress);

AfxMessageBox(out);

}

}

}

---- 7.在程序菜单中添加"发送消息"：

void CServerView::OnSendmessage() 

{

// TODO: Add your command handler code here

char msg[2000];

Csend Sendmessage;

if(Sendmessage.DoModal()

==IDOK&&!Sendmessage.m_Message.IsEmpty())

{

wsprintf(msg,"R: "+Sendmessage.m_Message);

sendto(m_sock,msg,1024,0,

(PSOCKADDR)&saClnt,saClntLen);

m_data[count++]=Sendmessage.m_Message;

flag=TRUE;

InvalidateRect(NULL);

}



}

---- 8.为发送消息项添加一个对话框的类,名为send,有一个文本框,用来发送消息.并为文本框添加CString m_Message 变量,并在ServerView.cpp中添加#include "send.h"

---- 9.为发送消息项添加一个判断函数:

void CServerView::OnUpdateSendmessage

(CCmdUI* pCmdUI) 

{

// TODO: Add your command update

 UI handler code here

pCmdUI->Enable(FALSE);

if(Isconnect)

pCmdUI->Enable(TRUE);

}

---- 10.再窗口显示消息:

void CServerView::OnDraw(CDC* pDC)

{if(flag)

{sizeTotal.cy+=20;

for(int j=65;jTextOut(10,y,m_data[i]);

y+=20;

}



// TODO: add draw code for native data here

}

---- 11.在Project中点击Settings中选择Link项添加wsock32.lib. 最后编译程序,就可以得到Server.exe程序.

---- 现在介绍客户机程序:

---- 1.创建一个名为"client"的项目,单文档界面.

---- 2.在clientview.h中加入代码：

#include "winsock.h"

添加变量:

CString m_data[1000];

HANDLE m_hListenThread;

SOCKET m_sock;

SOCKADDR_IN m_saSrvr;

BOOLIsconnect;

int count;

CSize sizeTotal;

BOOLflag;

---- 3.在构造函数中初始化变量:

CClientView::CClientView()

{

// TODO: add construction code here

Isconnect=FALSE;

sizeTotal.cy=350;

sizeTotal.cx=300;

flag=FALSE;

}

---- 4.在析构函数中完成清除操作:

CClientView::~CClientView()

{if(m_bInitialized)

WSACleanup();

closesocket(m_sock);

if(m_hListenThread)

::TerminateThread(m_hListenThread,0);

}

---- 5.在菜单中添加"拨号"项:

void CClientView::OnDial() 

{

// TODO: Add your command handler code here





count=5;

if(m_bInitialized)

{

AfxMessageBox("Already dialing");

return;

}

Cdial dial;

if(dial.DoModal()==

IDOK&&!dial.m_HostAddress.IsEmpty())

{

m_saSrvr.sin_family=AF_INET;

m_saSrvr.sin_addr.S_un.S_addr=htonl

(INADDR_ANY);

m_saSrvr.sin_addr.S_un.S_addr=inet_addr

(dial.m_HostAddress);

m_saSrvr.sin_port=htons(5050);

int status;

WSADATA wsaData;

m_data[0]="initializing Windows Sockets DLL....";

if((status=WSAStartup(0x0101,&wsaData))==0)

{

m_data[0]+="Succeeded";

m_bInitialized=TRUE;

}

else

{

m_bInitialized=FALSE;

}

m_sock=socket(AF_INET,SOCK_DGRAM,0);

m_data[1]="Creating socket....";

if(m_sock==INVALID_SOCKET)

{

m_data[1]+="Failed";

}

m_data[1]+="Succeeded";

m_data[2]="Binding socket....";

sockaddr_in sa;

sa.sin_family=AF_INET;

sa.sin_addr.S_un.S_addr=htonl

(INADDR_ANY);

sa.sin_port=htons(0);

if(bind(m_sock,(PSOCKADDR)&sa,

sizeof(sa))==SOCKET_ERROR)

{

m_data[2]+="Failed";

closesocket(m_sock);

}

m_data[2]+="Succeeded";

m_data[3]="Creating listener thread....";

unsigned long idThread;

m_hListenThread=CreateThread(NULL,0,

(LPTHREAD_START_ROUTINE)Listen,

(void *)this,0,&idThread);

if(m_hListenThread)

{m_data[3]+="Succeeded";

m_data[4]+="Waiting....";

}

else

m_data[4]+="Failed";

InvalidateRect(NULL);

}



}

---- 6.添加一个拨号对话框,名为dial,有一个文本框用来写IP地址.并在clientview.cpp中添加代码:

#include dial.h

---- 7.在拨号项添加一个判断函数:

void CClientView::OnUpdateDial

(CCmdUI* pCmdUI) 

{

// TODO: Add your command update 

UI handler code here

pCmdUI->Enable(TRUE);

if(Isconnect)

pCmdUI->Enable(FALSE);

}

---- 8.添加接收与发送消息的线程:

long WINAPI Listen(CClientView *pView)

{

char msg[2000];

pView- >m_data[5]="Sending ATTACH command";

pView- >InvalidateRect(NULL);

wsprintf(msg,"A: ");

sendto(pView- >m_sock,msg,1024,0,

(PSOCKADDR)&pView- >m_saSrvr,sizeof

(pView- >m_saSrvr));



int saSrvrLen ,nchar;

while(1)

{

saSrvrLen=sizeof(pView->m_saSrvr);

nchar=recvfrom(pView- >m_sock,msg,1024,0,

(PSOCKADDR)&pView- >m_saSrvr,&saSrvrLen);

if(nchar<0) { pView->m_data[pView- >count++]="Error in recvform";

pView- >InvalidateRect(NULL);

}

else

{

pView->m_data[pView- >count++]=msg;

pView->Isconnect=TRUE;

pView->flag=TRUE;

pView->InvalidateRect(NULL);

}



}



return(0);

}

---- 9.同主程序一样做一个发送消息项,代码如上.

---- 10.显示程序也与主程序一样,代码如上.

---- 11.在Project中点击Settings中选择Link项添加wsock32.lib.

---- 12.编译程序便可得到client.exe程序.

---- server.exe 和 client.exe 做完后,就可以在具有TCP/IP协议下的网络中执行. 通过上面的例子,你可以很快了解vc++网络编程的优点,你还可以添加其它功能项,在这我就不多加叙述了.希望我的程序能起到抛砖引玉的目的,让我们都能编出好的网络程序.

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