這是一個精練的客戶端套接字類,類名、函數名和變量名均採用匈牙利命名法。小寫的x表明個人姓氏首字母(謝欣倫),我的習慣而已,若有雷同,純屬巧合。函數
CxClientSocket的使用以下(以某個叫作CSomeClass的類的相關代碼爲例):this
1、聲明客戶端套接字對象實例。spa
CxClientSocket m_csRemoteHost;
2、設置客戶端套接字事件通知方式。消息響應或回調函數,任選其一。客戶端套接字事件有:緩衝區有數據可讀取、與遠程主機的鏈接被斷開。指針
void CSomeClass::PreSubclassWindow() { // TODO: Add your specialized code here and/or call the base class HWND hwnd = GetSafeHwnd(); MSG msg = {hwnd, WM_SOCKET_EVENT}; m_usRemoteHost.SetWindowMessage(&msg); m_csRemoteHost.SetWindowMessage(&msg); m_ssLocalHost.SetWindowMessage(&msg); if (m_btCSMode == CSM_SERVER) ListenRemoteHost(); CStatic::PreSubclassWindow(); }
3、鏈接遠程主機。code
BOOL CSomeClass::ConnectToRemoteHost() { if (m_csRemoteHost.IsConnected()) m_csRemoteHost.DisConnect(); BOOL bRet = m_csRemoteHost.Connect(m_ipapRemoteHost.szAddr, m_ipapRemoteHost.nPort); return bRet; }
4、處理消息響應或函數回調。
1.消息響應對象
BEGIN_MESSAGE_MAP(CSomeClass, CStatic) //{{AFX_MSG_MAP(CSomeClass) ON_WM_DESTROY() //}}AFX_MSG_MAP ON_MESSAGE(WM_SOCKET_EVENT, OnSocketEvent) END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CSomeClass message handlers LRESULT CSomeClass::OnSocketEvent(WPARAM wParam, LPARAM lParam) { if (WSAGETSELECTERROR(lParam) != 0) return 1; int nEvent = WSAGETSELECTEVENT(lParam); switch (nEvent) { case FD_ACCEPT: OnSocketAccept(wParam); break;
case FD_CLOSE: OnSocketClose(wParam); break;
case FD_READ: OnSocketRead(wParam); break;
default: break; } return 1; }
void CSomeClass::OnSocketRead(WPARAM wParam) { if (m_csRemoteHost.GetSocket() == (SOCKET)wParam) { m_csRemoteHost.SelectEvent(FD_CLOSE); SOME_DATA_STRUCT data = {0}; if (m_csRemoteHost.Recv((LPBYTE)&data, sizeof(data))) {
//do something with data;
} m_csRemoteHost.SelectEvent(FD_READ | FD_CLOSE); } } void CSomeClass::OnSocketClose(WPARAM wParam) { if (m_csRemoteHost.GetSocket() == (SOCKET)wParam) { m_csRemoteHost.DisConnect(); char szDebug[MAX_PATH]; sprintf(szDebug, "%s disconnect.\n", m_szRemoteHostName); OutputDebugString(szDebug); GetParent()->PostMessage(WM_SOCKET_EVENT, (WPARAM)this, FD_CLOSE); } }
2.回調函數blog
LRESULT CALLBACK CSomeClass::SocketProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { LRESULT lRet = 0; CSomeClass* pThis = (CSomeClass*)hwnd; if (pThis != 0) lRet = pThis->OnSocketEvent(wParam, lParam); return lRet; }
注意,在使用回調函數時應設置客戶端套接字事件通知方式爲回調函數,而且設法把this指針傳入設置函數,方便在回調函數中調用成員函數。事件
MSG msg = {(HWND)this, WM_SOCKET_EVENT}; m_csRemoteHost.SetWindowMessage(&msg, SocketProc);
5、斷開與遠程主機的鏈接。ip
void CSomeClass::OnDestroy() { CStatic::OnDestroy(); // TODO: Add your message handler code here TerminateWaitComm(); m_csRemoteHost.DisConnect(); m_ssLocalHost.DisListen(); m_usRemoteHost.Disbind(); }
至於客戶端套接字數據發送,很簡單:在須要處調用如下函數:ci
m_csRemoteHost.Send((LPBYTE)pData, sizeof(SOME_DATA_STRUCT));
精練的代碼不須要過多解釋,大家懂的。To be continued...
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