VC基于消息的异步套接字

用WSAStartup，需要在StdAfx.h头文件中需要声明

#include   
#pragma   comment(lib,"WS2_32.lib")

用AfxSocket，需要在StdAfx.h头文件中需要声明

#include

用到了两种，则需要：

#include   
#pragma   comment(lib,"WS2_32.lib")

#include   

上述方法是否可行，需要验证？（在三门峡自动化收购管理系统中，用到了上述内容）

1、在【项目名.cpp】文件BOOL CXxxApp::InitInstance ()中添加代码：

                // 加载套接字库

                 WORD wVersionRequested ;

                 WSADATA wsaData ;

                 int err ;

 

                 wVersionRequested = MAKEWORD (2, 2);

                 err = WSAStartup (wVersionRequested, & wsaData);

                 if (err != 0)

                {

                                 MessageBox(NULL , _T( "启动异步套接字失败！" ), _T( "提示"), MB_OK );

                                 return FALSE ;

                }

                 if (LOBYTE (wsaData. wVersion) != 2 || HIBYTE (wsaData. wVersion) != 2)

                {

                                 WSACleanup();

                                 MessageBox(NULL , _T( "Socket版本错误！" ), _T( "提示"), MB_OK );

                                 return FALSE ;

                }

 

2、析构函数中

CLineControlApp::~CLineControlApp ()

{

                 // TODO: add construction code here,

                 // Place all significant initialization in InitInstance

                 WSACleanup();

}

 

3、在头文件中

 

#define UM_SOCK              WM_USER + 1  // Socket接收到信息

 

在类中定义套接字

SOCKET m_socket ; // 套接字描述符

 

BOOL InitSocket (void);

 

//afx_msg void OnSock(WPARAM wParam , LPARAM lParam );  // VC6

afx_msg LRESULT OnSock(WPARAM wParam , LPARAM lParam );  // VC2005以上

 

 

4、创建并初始化套接字

// 创建并初始化套接字

BOOL CZdhsgDlg ::InitSocket( void)

{

                 m_socket = WSASocket (AF_INET, SOCK_DGRAM, 0, NULL , 0, 0);

                 if (INVALID_SOCKET == m_socket)

                {

                                 MessageBox(_T ("套接字创建失败！"), _T ("错误"));

                                 return FALSE ;

                }

                 // 地址结构体

                 SOCKADDR_IN addrSock ;

                 addrSock.sin_family = AF_INET;

                 addrSock.sin_port = htons(20131);

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

                 ////////////////////////////////////////称重线程接收报错1054，增加该函数

                 DWORD dwBytesReturned = 0;

                 BOOL bNewBehavior = FALSE;

                 DWORD status ;

                 status = WSAIoctl (m_socket, SIO_UDP_CONNRESET, &bNewBehavior , sizeof( bNewBehavior), NULL, 0, &dwBytesReturned , NULL, NULL);

 

                 // 接收缓冲区

                 int nRecvBuf = 128 * 1024; // 设置为128K

                 setsockopt(m_socket , SOL_SOCKET, SO_RCVBUF, (const char*)& nRecvBuf, sizeof (int));

                 // 发送缓冲区

                 int nSendBuf = 128 * 1024; // 设置为128K

                 setsockopt(m_socket , SOL_SOCKET, SO_SNDBUF, (const char*)& nSendBuf, sizeof (int));

 

                 //////////////////////////////////////////

                 // 绑定套接字

                 if (SOCKET_ERROR == bind( m_socket, (SOCKADDR *)&addrSock, sizeof(SOCKADDR )))

                {

                                 MessageBox(_T ("绑定套接字失败！"), _T ("错误"));

                                 return FALSE ;

                }

                 // 请求一个基于Windows消息的网络事件通知

                 if (SOCKET_ERROR == WSAAsyncSelect( m_socket, m_hWnd , UM_SOCK, FD_READ))

                {

                                 MessageBox(_T ("注册网络读取事件失败！" ), _T( "错误"));

                                 return FALSE ;

                }

 

                 return TRUE ;

}

 

 

5、在CPP文件中：

OnInitDialog ()中加入：InitSocket();

 

BEGIN_MESSAGE_MAP (CZdhxtEmulatorDlg, CDialogEx)

                 ON_WM_SYSCOMMAND()

                 ON_WM_PAINT()

                 ON_WM_QUERYDRAGICON()

                 ON_MESSAGE (UM_SOCK , OnSock) // 加入这一行代码

END_MESSAGE_MAP()

 

 

6、OnSock()

LRESULT CZdhsgDlg ::OnSock( WPARAM wParam , LPARAM lParam)

{

                 CString temp ;

 

                 switch(LOWORD (lParam))

                {

                 case FD_READ :

                                 WSABUF wsabuf ;

                                 wsabuf.buf = new char[200];

                                 wsabuf.len = 200;

                                 DWORD dwRead = 0;

                                 DWORD dwFlag = 0;

                                 SOCKADDR_IN addrFrom ;

                                 int len = sizeof( SOCKADDR);

                                 // WSARecvFrom接收数据报类型的数据，并保存数据发送方地址

                                 if (SOCKET_ERROR == WSARecvFrom( m_socket, &wsabuf , 1, &dwRead, & dwFlag, (SOCKADDR*)&addrFrom , &len, NULL, NULL ))

                                {

                                                 temp.Format (_T( "Socket接收数据失败：%d" ), WSAGetLastError());

                                                 AddLog(temp );

                                                 delete[] wsabuf .buf;

                                                 return FALSE ;

                                }

 

                                 CString address ;

                                 address.Format (_T( "%s"), inet_ntoa (addrFrom. sin_addr));

 

                                 if (dwRead < 1)

                                {

                                                 temp.Format (_T( "Socket未接收到数据！来自：%s" ), address);

                                                 AddLog(temp );

                                                 delete[] wsabuf .buf;

                                                 return FALSE ;

                                }

 

                                 /*CString str;

                                str.Format(_T("%s\t%s"), inet_ntoa(addrFrom.sin_addr), wsabuf.buf);

                                WriteSgxtLog(str);*/

 

                                 BYTE *data ;       // 保存从接收缓冲区中提取的数据包

                                 data = new BYTE[ dwRead];

                                 memset(data , 0, dwRead);

                                 memcpy(data , wsabuf. buf, dwRead ); // nRevData[0]中存放的是数据包的有效长度lRevDataLen

                                 //CheckReceiveData(address, data, dwRead);

                                 m_dataChecker.CheckReceiveData (address, data, dwRead , this-> GetSafeHwnd());

 

                                 delete[] wsabuf .buf;

                                 break;

                }

 

                 return TRUE ;

}

 

7、析构函数

CZdhsgDlg::~CZdhsgDlg ()

{

                 if (m_socket )

                {

                                 closesocket(m_socket );

                }

}

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