WSAAsyncSelect model instance in C++
- 2020-04-02 02:49:54
- OfStack
This article illustrates the use of the WSAAsyncSelect model in C++. Share with you for your reference. The specific implementation method is as follows:
Tcpserver.cpp source file is as follows:
#include "TCPServer.h"
#include "resource.h"
#define WM_SOCKET WM_USER+1
CMyApp theApp;
BOOL CMyApp::InitInstance()
{
//Initializing the socket & NBSP; < br / >
WSADATA wsaData;
WORD wVersionRequested = MAKEWORD(2,0);
::WSAStartup(wVersionRequested, &wsaData);
//Displays the dialog box & cake; < br / >
CMainDialog dlg;
m_pMainWnd = &dlg;
dlg.DoModal();
//Release socket & NBSP; < br / >
::WSACleanup();
return FALSE;
}
//CMainDialog
CMainDialog::CMainDialog(CWnd* pParentWnd):CDialog(IDD_MAINDIALOG,pParentWnd)
{
}
BEGIN_MESSAGE_MAP(CMainDialog, CDialog)
ON_BN_CLICKED(IDC_START, OnStart)
ON_BN_CLICKED(IDC_CLEAR, OnClear)
ON_MESSAGE(WM_SOCKET, OnSocket)
END_MESSAGE_MAP()
void CMainDialog::OnCancel()
{
this->CloseAllSocket();
CDialog::OnCancel();
}
BOOL CMainDialog::OnInitDialog()
{
CDialog::OnInitDialog();
//Set icon & cake; < br / >
SetIcon(theApp.LoadIconA(IDI_MAIN), FALSE);
//Creates the status bar and sets its property & NBSP; < br / >
m_bar.Create(WS_CHILD|WS_VISIBLE|SBS_SIZEGRIP, CRect(0,0,0,0), this, 101);
m_bar.SetBkColor(RGB(0xa6, 0xca, 0xfa));
int arWidth[]={200,-1};
m_bar.SetParts(2, arWidth);
m_bar.SetText("windows The program design ", 1, 0);
m_bar.SetText(" free ", 0, 0);
//Associated list control & NBSP; < br / >
m_listInfo.SubclassDlgItem(IDC_LIST, this);
//Initializes the list of sockets and connections & NBSP; < br / >
m_socket = INVALID_SOCKET;
m_nClient = 0;
//Gets the native IP and displays & NBSP; in the status bar; < br / >
char szHostName[MAX_PATH] = {0};
::gethostname(szHostName, MAX_PATH);
hostent *pHost = gethostbyname(szHostName);
if (pHost != NULL)
{
CString strIP;
in_addr* addr = (in_addr*)*pHost->h_addr_list;
strIP.Format(" This machine IP:%s",inet_ntoa(addr[0]));
m_bar.SetText(strIP, 0, 0);
}
return TRUE;
}
BOOL CMainDialog::CreateAndListen(int nPort)
{
if (m_socket == INVALID_SOCKET)
{
::closesocket(m_socket);
}
//Create a socket & NBSP; < br / >
m_socket = ::socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (m_socket == INVALID_SOCKET)
{
return FALSE;
}
//Bind port & NBSP; < br / >
sockaddr_in sin;
sin.sin_family = AF_INET;
sin.sin_port = htons(nPort);
//sin.sin_addr.S_un.S_addr = INADDR_ANY;
sin.sin_addr.s_addr = INADDR_ANY;
int nErr = GetLastError();
if (::bind(m_socket, (sockaddr*)&sin, sizeof(sin)) == SOCKET_ERROR)
{
nErr = GetLastError();
return FALSE;
}
::WSAAsyncSelect(m_socket, m_hWnd, WM_SOCKET, FD_ACCEPT|FD_CLOSE|FD_READ);
//Enter the listening mode & NBSP; < br / >
::listen(m_socket, 5);
return TRUE;
}
BOOL CMainDialog::AddClient(SOCKET s)
{
if (m_nClient < MAX_SOCKET)
{
m_arClient[m_nClient++] = s;
return TRUE;
}
return FALSE;
}
void CMainDialog::RemoveClient(SOCKET s)
{
BOOL bFound = FALSE;
int i;
for (i=0;i<m_nClient;i++)
{
if (m_arClient[i] == s)
{
bFound = TRUE;
break;
}
}
//Find & have spent < br / >
if (bFound)
{
m_nClient--;
for (int j=i;j<m_nClient;j++)
{
m_arClient[j] = m_arClient[j+1];
}
}
}
void CMainDialog::CloseAllSocket()
{
if (m_socket != INVALID_SOCKET)
{
::closesocket(m_socket);
m_socket = INVALID_SOCKET;
}
for (int i=0;i<m_nClient;i++)
{
::closesocket(m_arClient[i]);
}
m_nClient = 0;
}
void CMainDialog::OnStart()
{
if (m_socket == INVALID_SOCKET) //Turn on the service & cake; < br / >
{
CString strPort;
GetDlgItem(IDC_PORT)->GetWindowText(strPort);
int nPort = atoi(strPort);
if (nPort < 1 || nPort >65535)
{
MessageBox("port error");
return;
}
//Create a socket & NBSP; < br / >
if (!this->CreateAndListen(nPort))
{
MessageBox("create socket error");
return;
}
//Setting control state & NBSP; < br / >
GetDlgItem(IDC_START)->SetWindowTextA(" Stop the service ");
m_bar.SetText(" Is listening ...", 0, 0);
GetDlgItem(IDC_PORT)->EnableWindow(FALSE);
}
else //Close the service & cake; < br / >
{
CloseAllSocket();
GetDlgItem(IDC_START)->SetWindowTextA(" Open the service ");
m_bar.SetText(" free ", 0, 0);
GetDlgItem(IDC_PORT)->EnableWindow(TRUE);
}
return ;
}
void CMainDialog::OnClear()
{
m_listInfo.ResetContent();
return ;
}
long CMainDialog::OnSocket(WPARAM wParam, LPARAM lParam)
{
//Getting a handle & NBSP; & have spent < br / >
SOCKET s = wParam;
//Check if anything is wrong & sponge; < br / >
if (WSAGETSELECTERROR(lParam))
{
RemoveClient(s);
::closesocket(s);
return 0;
}
//Dealing with the events that occur & NBSP; < br / >
switch (WSAGETSELECTEVENT(lParam))
{
case FD_ACCEPT: //Listen for a connection to enter & NBSP in a socket; < br / >
{
MessageBox("server:accept");
if (m_nClient < MAX_SOCKET)
{
SOCKET client = ::accept(s, NULL, NULL);
this->AddClient(client);
}
else
{
MessageBox("too many connection");
}
}
break;
case FD_CLOSE:
{
MessageBox("server:close");
RemoveClient(s);
closesocket(s);
}
break;
case FD_READ: //Receiving a packet from the other party < br / >
{
MessageBox("server:read");
//Get your partner's address & NBSP; < br / >
sockaddr_in sockAddr;
memset(&sockAddr, 0, sizeof(sockAddr));
int nSockAddrLength = sizeof(sockAddr);
::getpeername(s, (sockaddr*)&sockAddr, &nSockAddrLength);
int nPeerPort = ntohs(sockAddr.sin_port);
CString strIP = inet_ntoa(sockAddr.sin_addr); // strIP
//Get the host name & NBSP; < br / >
DWORD dwIP = ::inet_addr(strIP);
hostent* pHost = ::gethostbyaddr((LPSTR)&dwIP, 4, AF_INET);
char szHostName[256]={0};
strncpy(szHostName, pHost->h_name, 256);
//Getting network data & NBSP; < br / >
char szContent[1024]={0};
::recv(s, szContent, 1024, 0);
//Display & have spent < br / >
CString strItem = CString(szHostName) + "[" + strIP + "]:" + CString(szContent);
m_listInfo.InsertString(0, strItem);
}
break;
}
return 0;
}Tcpserver.h header file is as follows:
#include <afxwin.h>
#include <afxext.h> //CStatusBar
#include <WinSock2.h>
#include <afxcmn.h>
#pragma comment(lib, "WS2_32.lib")
#define MAX_SOCKET 56 //Maximum number of clients & NBSP; < br / >
class CMyApp:public CWinApp
{
public:
BOOL InitInstance();
};
//CMainDialog
class CMainDialog:public CDialog
{
public:
CMainDialog(CWnd* pParentWnd=NULL);
protected:
virtual BOOL OnInitDialog();
virtual void OnCancel();
//Start or stop service & cake; < br / >
afx_msg void OnStart();
afx_msg void OnClear();
afx_msg long OnSocket(WPARAM wParam, LPARAM lParam);
BOOL CreateAndListen(int nPort);
//Add a customer & NBSP; to the customer connection list; < br / >
BOOL AddClient(SOCKET s);
//Removes a client & NBSP; from the client connection list; < br / >
void RemoveClient(SOCKET s);
//Close all connections & NBSP; < br / >
void CloseAllSocket();
protected:
SOCKET m_socket;
//Two child window controls & NBSP; < br / >
CListBox m_listInfo;
CStatusBarCtrl m_bar;
//Client connection list & NBSP; < br / >
SOCKET m_arClient[MAX_SOCKET]; //Socket list & NBSP; < br / >
int m_nClient; //The size of the above array & NBSP; < br / >
DECLARE_MESSAGE_MAP()
};Tcpclient.cpp source file is as follows:
#include "TCPClient.h"
#include "resource.h"
#define WM_SOCKET WM_USER+1
CMyApp theApp;
BOOL CMyApp::InitInstance()
{
//Initializing the socket & NBSP; < br / >
WSADATA wsaData;
WORD wVersionRequested = MAKEWORD(2,0);
::WSAStartup(wVersionRequested, &wsaData);
//Displays the dialog box & cake; < br / >
CMainDialog dlg;
m_pMainWnd = &dlg;
dlg.DoModal();
//Release socket & NBSP; < br / >
::WSACleanup();
return FALSE;
}
//CMainDialog
CMainDialog::CMainDialog(CWnd* pParentWnd):CDialog(IDD_MAINDIALOG,pParentWnd)
{
}
BEGIN_MESSAGE_MAP(CMainDialog, CDialog)
ON_BN_CLICKED(IDC_CONNECT, OnConnect)
ON_BN_CLICKED(IDC_SEND, OnSend)
ON_MESSAGE(WM_SOCKET, OnSocket)
END_MESSAGE_MAP()
void CMainDialog::OnCancel()
{
CDialog::OnCancel();
}
BOOL CMainDialog::OnInitDialog()
{
CDialog::OnInitDialog();
//Set icon & cake; < br / >
SetIcon(theApp.LoadIconA(IDI_MAIN), FALSE);
//Associated control & NBSP; < br / >
m_edit_text.SubclassDlgItem(IDC_EDIT_CONTENT, this);
//The status bar & have spent < br / >
m_bar.Create(WS_CHILD|WS_VISIBLE|SBS_SIZEGRIP, CRect(0, 0, 0,0), this, NULL);
int nWidth[]={100,-1};
m_bar.SetParts(2, nWidth);
m_bar.SetText("windows The program design ", 1, 0);
m_bar.SetText(" free ", 0, 0);
GetDlgItem(IDC_ADDR)->SetWindowTextA("192.168.19.143");
GetDlgItem(IDC_PORT)->SetWindowTextA("9999");
//
m_socket = INVALID_SOCKET;
return TRUE;
}
void CMainDialog::AddStringToList(CString strText)
{
CString strContent;
GetDlgItem(IDC_EDIT_CONTENT)->GetWindowText(strContent);
GetDlgItem(IDC_EDIT_CONTENT)->SetWindowText(strContent+strText);
}
long CMainDialog::OnSocket(WPARAM wParam, LPARAM lParam)
{
SOCKET s = wParam;
if (WSAGETSELECTERROR(lParam))
{
::closesocket(m_socket);
m_socket = INVALID_SOCKET;
return 0;
}
switch (WSAGETSELECTEVENT(lParam))
{
case FD_READ:
{
MessageBox("client:read");
char szText[1024]={0};
::recv(s, szText, 1024, 0);
AddStringToList(CString(szText)+"rn");
}
break;
case FD_CONNECT:
{
MessageBox("client:connect");
GetDlgItem(IDC_CONNECT)->SetWindowTextA(" disconnect ");
GetDlgItem(IDC_ADDR)->EnableWindow(FALSE);
GetDlgItem(IDC_PORT)->EnableWindow(FALSE);
GetDlgItem(IDC_TEXT)->EnableWindow(TRUE);
GetDlgItem(IDC_SEND)->EnableWindow(TRUE);
m_bar.SetText(" Already connected to the server ", 0, 0);
}
break;
case FD_CLOSE:
{
MessageBox("client:close");
OnConnect();
}
break;
}
return 0;
}
BOOL CMainDialog::Connect(LPCTSTR pszRemoteAddr, u_short nPort)
{
//Create a socket & NBSP; < br / >
m_socket = ::socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (INVALID_SOCKET == m_socket)
{
return FALSE;
}
::WSAAsyncSelect(m_socket, m_hWnd, WM_SOCKET, FD_READ|FD_WRITE|FD_CONNECT|FD_CLOSE);
ULONG uAddr = ::inet_addr(pszRemoteAddr);
if (uAddr == INADDR_NONE)
{
//If it's not an IP address, think of it as a host name & NBSP; < br / >
//Get IP from the host name; < br / >
hostent* pHost = ::gethostbyname(pszRemoteAddr);
if (pHost == NULL)
{
::closesocket(m_socket);
m_socket = INVALID_SOCKET;
return FALSE;
}
uAddr = ((struct in_addr*)*(pHost->h_addr_list))->s_addr;
}
//Fill in the server info & NBSP; < br / >
sockaddr_in remote;
remote.sin_family = AF_INET;
remote.sin_addr.S_un.S_addr = uAddr;
remote.sin_port = ::htons(nPort);
//The connection & have spent < br / >
::connect(m_socket, (sockaddr*)&remote, sizeof(sockaddr));
return TRUE;
}
void CMainDialog::OnConnect()
{
if (INVALID_SOCKET == m_socket) //Connect to server & NBSP; < br / >
{
CString strAddr;
GetDlgItem(IDC_ADDR)->GetWindowText(strAddr);
if (strAddr.IsEmpty())
{
MessageBox("the servers IP is empty");
return;
}
CString strPort;
GetDlgItem(IDC_PORT)->GetWindowTextA(strPort);
int nPort = atoi(strPort);
if (nPort < 1 || nPort > 65535)
{
MessageBox("port error");
return;
}
if (Connect(strAddr, nPort) == FALSE)
{
MessageBox("connect to servers error...");
return;
}
//Setting up the user interface & NBSP; < br / >
GetDlgItem(IDC_CONNECT)->SetWindowText(" cancel ");
m_bar.SetText(" Are connected ..", 0, 0);
}
else //Disconnect the server & NBSP; < br / >
{
::closesocket(m_socket);
m_socket = INVALID_SOCKET;
//Setting up the user interface & NBSP; < br / >
GetDlgItem(IDC_CONNECT)->SetWindowTextA(" Connect to server ");
m_bar.SetText(" free ", 0, 0);
GetDlgItem(IDC_ADDR)->EnableWindow(TRUE);
GetDlgItem(IDC_PORT)->EnableWindow(TRUE);
GetDlgItem(IDC_SEND)->EnableWindow(FALSE);
GetDlgItem(IDC_TEXT)->EnableWindow(FALSE);
}
//this->Connect(szAddr, )
}
void CMainDialog::OnSend()
{
CString strSendContent;
GetDlgItem(IDC_TEXT)->GetWindowTextA(strSendContent);
::send(m_socket, strSendContent, strSendContent.GetLength(), 0);
GetDlgItem(IDC_TEXT)->SetWindowTextA("");
}Tcpclient.h header file is as follows:
#include <afxwin.h>
#include <afxext.h> //CStatusBar
#include <WinSock2.h>
#include <afxcmn.h>
#pragma comment(lib, "WS2_32.lib")
#define MAX_SOCKET 56 //Maximum number of clients & NBSP; < br / >
class CMyApp:public CWinApp
{
public:
BOOL InitInstance();
};
//CMainDialog
class CMainDialog:public CDialog
{
public:
CMainDialog(CWnd* pParentWnd=NULL);
protected:
virtual BOOL OnInitDialog();
virtual void OnCancel();
////Start or stop service & cake; < br / >
//afx_msg void OnStart();
afx_msg void OnSend();
afx_msg long OnSocket(WPARAM wParam, LPARAM lParam);
void OnConnect();
BOOL Connect(LPCTSTR pszRemoteAddr, u_short nPort);
SOCKET m_socket;
//Control & have spent < br / >
CStatusBarCtrl m_bar;
CEdit m_edit_text;
void AddStringToList(CString strText);
//BOOL CreateAndListen(int nPort);
////Add a customer & NBSP; to the customer connection list; < br / >
//BOOL AddClient(SOCKET s);
////Removes a client & NBSP; from the client connection list; < br / >
//void RemoveClient(SOCKET s);
////Close all connections & NBSP; < br / >
//void CloseAllSocket();
DECLARE_MESSAGE_MAP()
};Hope that the article described in the C++ programming to help you.