网络编程的练习2

王朝vc·作者佚名  2006-12-17
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网络编程的练习2

网络编程的练习2 这是一个服务器端的类,采用的是TCP传输

服务端 客户机

socket()

bind()

listen() socket()

accept()

阻塞.等待客户 connect()

read() write()

处理服务请求

write() read()

close() close()

/*

*******************************************************

2004 12 06

stephen

*******************************************************

*/

#include <Winsock2.h>

#pragma comment(lib,"Ws2_32.lib")

#define MAXSIZE 50

#define WM_RECEIVEDATA WM_USER+1002

class CNetServer

{

public:

CNetServer();

CNetServer(int port);

~CNetServer();

//读数据

static DWORD WINAPI ThreadServer(LPVOID n);

//初始化服务器

bool InitNetServer();

// 发送到指定的客户端

bool SendDataToClient(int nclient,char* data,int len);

// 发送到所有的客户端

bool SendDataToClient(char* data,int len);

//指定接收数据的窗口句柄

inline void SethWnd(HWND hWnd)

{

m_hWnd = hWnd;

}

int getCount();

// 返回错误信息

char* GetLastError();

//关闭服务器

void CloseServer();

//关闭服务器

void DestoryServer();

private:

HANDLE hThread;

HWND m_hWnd;

int port;

char szError[256];

char getData[256];

int nReceive;

int addlen;

SOCKET sock;

SOCKET clientSocket[MAXSIZE];

sockaddr_in servaddr;

WSADATA wsData;

};

CNetServer::CNetServer()

{

this->sock = INVALID_SOCKET;

this->hThread=NULL;

this->port = 9999;

for(int i=0;i<MAXSIZE;i++)

{

clientSocket[i] = INVALID_SOCKET;

}

}

CNetServer::CNetServer(int port)

{

this->sock = INVALID_SOCKET;

this->hThread=NULL;

this->port = port;

for(int i=0;i<MAXSIZE;i++)

{

clientSocket[i] = INVALID_SOCKET;

}

}

CNetServer::~CNetServer()

{

this->DestoryServer();

}

char* CNetServer::GetLastError()

{

return this->szError;

}

bool CNetServer::InitNetServer()

{

if(WSAStartup(MAKEWORD(1,1),&this->wsData) != 0)

{

wsprintf(this->szError,TEXT("WSAStartup failed.Error:%d"),WSAGetLastError());

return false;

}

this->servaddr.sin_addr.s_addr = htonl(INADDR_ANY);

this->servaddr.sin_family = AF_INET;

this->servaddr.sin_port = htons(this->port);

this->addlen = sizeof(servaddr);

sock = socket(AF_INET,SOCK_STREAM,0);

if( sock == SOCKET_ERROR)

{

wsprintf(this->szError,TEXT("bind failed.Error:%d"),WSAGetLastError());

return false;

}

if(bind(sock,(sockaddr*)&servaddr,sizeof(servaddr)) == SOCKET_ERROR)

{

wsprintf(this->szError,TEXT("bind failed.Error:%d"),WSAGetLastError());

return false;

}

else

{

listen(sock,5);

hThread = CreateThread(NULL,0,CNetServer::ThreadServer,this,0,NULL);

return true;

}

}

int CNetServer::getCount()

{

for( int i =0;i<MAXSIZE;i++)

{

if(clientSocket[i] == INVALID_SOCKET)

return i;

}

return -1;

}

DWORD WINAPI CNetServer::ThreadServer(LPVOID n)

{

CNetServer* pServer = (CNetServer*)n;

char buff[1024] = "";

int rev = 1,flag = 0;

int clientcount=-1;

clientcount = pServer->getCount();

if(clientcount == -1)

{

return 0L;

}

else

{

rev = 1;

pServer->clientSocket[clientcount] =

accept(pServer->sock,(sockaddr*)&(pServer->servaddr),

&pServer->addlen);

if( pServer->clientSocket[clientcount] == INVALID_SOCKET)

{

wsprintf(pServer->szError,TEXT("accept failed.Error:%d"),WSAGetLastError());

return 0L;

}

else

{

::CreateThread(NULL,0,CNetServer::ThreadServer,pServer,0,NULL);

while(rev != SOCKET_ERROR)

{

rev = recv(pServer->clientSocket[clientcount],

buff,1024,0);

if(rev != SOCKET_ERROR)

{

//::SendMessage(pServer->m_hWnd,WM_RECEIVEDATA,0,(LPARAM)buff);

MessageBox(NULL,(LPCTSTR)buff,"receiveData",0);

}

}

}

}

return 1;

}

bool CNetServer::SendDataToClient(int nclient,char* data,int len)

{

int i=0;

if(sock == INVALID_SOCKET)

return false;

if(clientSocket[nclient] == INVALID_SOCKET)

return false;

if(send(clientSocket[nclient],data,len,0) == SOCKET_ERROR)

{

wsprintf(this->szError,TEXT("send failed.Error:%d"),WSAGetLastError ());

return false;

}

return true;

}

bool CNetServer::SendDataToClient(char* data,int len)

{

for(int i=0;i<MAXSIZE;i++)

{

if(clientSocket[i] != INVALID_SOCKET)

if(send(clientSocket[i],data,len,0) == SOCKET_ERROR)

{

wsprintf(this->szError,TEXT("send failed.Error:%d"),WSAGetLastError ());

return false;

}

}

}

void CNetServer::CloseServer()

{

WaitForSingleObject(this->hThread,INFINITE);

for(int i=0;i<MAXSIZE;i++)

{

if(clientSocket[i] !=INVALID_SOCKET)

closesocket(clientSocket[i]);

}

WSACleanup();

}

void CNetServer::DestoryServer()

{

DWORD exitCode=0;

GetExitCodeThread(this->hThread,&exitCode);

TerminateThread(this->hThread,exitCode);

for(int i=0;i<MAXSIZE;i++)

{

if(clientSocket[i] !=INVALID_SOCKET)

closesocket(clientSocket[i]);

WSACleanup();

}

}

/*

********************************************************************************

TEST

********************************************************************************

*/

#include "stdafx.h"

#include <iostream.h>

#include <string>

#include "NetServer.h"

int main()

{

CNetServer net(9999);

if(net.InitNetServer()==false)

cout<<"InitNetServer"<<net.GetLastError()<<endl;

char data[1024]="";

while(cin>>data !="exit")

{

net.SendDataToClient(data,sizeof(data));

net.SendDataToClient(1,data,sizeof(data));

}

net.CloseServer();

}

/*

可用telnet 127.0.0.1 9999 测试,也可用CNet测试, 不当之处,欢迎指点

*/

 
 
 
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