发布时间 : 星期六 文章WSAASYNCSELECT - IO-模型的程序设计更新完毕开始阅读
程序设计流程图:
①对流程图进行解析:首先,我们得用描述主窗口的参数填充WNDCLASSEX结构,注册窗口类,之后便是创建主窗口,将主窗口显示出来(出错与否),然后创建套接字,WSAAsyncSelect,绑定套接字到本地机器,指定监听的端口号,创建监听套接字,进入监听模式,最后消息循环,退出系统。
②代码及说明
#include \#include
#define WM_SOCKET WM_USER + 101 // 自定义消息 CInitSock theSock;
LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam); int main() {
char szClassName[] = \ WNDCLASSEX wndclass;
// 用描述主窗口的参数填充WNDCLASSEX结构 wndclass.cbSize = sizeof(wndclass);
wndclass.style = CS_HREDRAW|CS_VREDRAW; wndclass.lpfnWndProc = WindowProc; wndclass.cbClsExtra = 0; wndclass.cbWndExtra = 0; wndclass.hInstance = NULL;
wndclass.hIcon = ::LoadIcon(NULL, IDI_APPLICATION); wndclass.hCursor = ::LoadCursor(NULL, IDC_ARROW);
wndclass.hbrBackground = (HBRUSH)::GetStockObject(WHITE_BRUSH); wndclass.lpszMenuName = NULL; wndclass.lpszClassName = szClassName ; wndclass.hIconSm = NULL; ::RegisterClassEx(&wndclass); // 创建主窗口
HWND hWnd = ::CreateWindowEx( 0, szClassName, \ WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, NULL, NULL); if(hWnd == NULL) { ::MessageBox(NULL, \创建窗口出错!\ return -1; }
USHORT nPort = 4567; // 此服务器监听的端口号
注:此处4567为编写时端口,调试时用42247,42503两个端口测试。
// 创建监听套节字
SOCKET sListen = ::socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); sockaddr_in sin;
sin.sin_family = AF_INET; sin.sin_port = htons(nPort);
sin.sin_addr.S_un.S_addr = INADDR_ANY; // 绑定套节字到本地机器
if(::bind(sListen, (sockaddr*)&sin, sizeof(sin)) == SOCKET_ERROR) { printf(\ return -1; }
// 将套接字设为窗口通知消息类型。
::WSAAsyncSelect(sListen, hWnd, WM_SOCKET, FD_ACCEPT|FD_CLOSE);
// 进入监听模式 ::listen(sListen, 5);
// 从消息队列中取出消息 MSG msg;
while(::GetMessage(&msg, NULL, 0, 0)) { // 转化键盘消息 ::TranslateMessage(&msg); // 将消息发送到相应的窗口函数 ::DispatchMessage(&msg); }
// 当GetMessage返回0时程序结束 return msg.wParam; }
LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
switch (uMsg) {
case WM_SOCKET: { // 取得有事件发生的套节字句柄 SOCKET s = wParam; // 查看是否出错 if(WSAGETSELECTERROR(lParam))
{ ::closesocket(s); return 0; } // 处理发生的事件 switch(WSAGETSELECTEVENT(lParam)) { case FD_ACCEPT: // 监听中的套接字检测到有连接进入 { SOCKET client = ::accept(s, NULL, NULL); ::WSAAsyncSelect(client, hWnd, FD_READ|FD_WRITE|FD_CLOSE); } break; case FD_WRITE: { } break; case FD_READ: { char szText[1024] = { 0 }; if(::recv(s, szText, 1024, 0) == -1) ::closesocket(s); else printf(\接收数据:%s\ } break; case FD_CLOSE: { ::closesocket(s); } break; } } return 0;
case WM_DESTROY: ::PostQuitMessage(0) ; return 0 ; }
// 将我们不处理的消息交给系统做默认处理
return ::DefWindowProc(hWnd, uMsg, wParam, lParam); }
WM_SOCKET,