WSAAsyncSelect Demo

  1 #include <WinSock2.h>
  2 #include <Windows.h>
  3 #include <StrSafe.h>
  4 
  5 #pragma comment(lib, "Ws2_32")
  6 
  7 #define WM_SOCKET WM_USER+1
  8 
  9 LRESULT CALLBACK WinProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 10 {
 11     switch (uMsg)
 12     {
 13     case WM_SOCKET:
 14         {
 15             if (WSAGETSELECTERROR(lParam))
 16             {
 17                 shutdown(wParam, SD_BOTH);
 18                 closesocket(wParam);
 19                 return 0;
 20             }
 21 
 22             switch (WSAGETSELECTEVENT(lParam))
 23             {
 24             case FD_ACCEPT:
 25                 {
 26                     SOCKET client = accept(wParam, NULL, NULL);
 27                     WSAAsyncSelect(client, hWnd, WM_SOCKET, FD_READ | FD_WRITE | FD_CLOSE);
 28                 }
 29                 break;
 30             case FD_WRITE:
 31                 break;
 32             case FD_READ:
 33                 {
 34                     CHAR szText[1024] = { 0 };
 35                     if (SOCKET_ERROR == recv(wParam, szText, 1024, 0))
 36                     {
 37                         shutdown(wParam, SD_BOTH);
 38                         closesocket(wParam);
 39                     }
 40                     else
 41                     {
 42                         CHAR szMsg[1100] = "接收数据：";
 43                         strcat_s(szMsg, szText);
 44                         MessageBoxA(hWnd, szMsg, "结果", MB_OK);
 45                     }
 46                 }
 47                 break;
 48             case FD_CLOSE:
 49                 shutdown(wParam, SD_BOTH);
 50                 closesocket(wParam);
 51                 break;
 52             }
 53         }
 54         return 0;
 55     case WM_DESTROY:
 56         PostQuitMessage(0);
 57         return 0;
 58     default:
 59         return DefWindowProc(hWnd, uMsg, wParam, lParam);
 60     }
 61     return DefWindowProc(hWnd, uMsg, wParam, lParam);
 62 }
 63 
 64 int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPreInstance, PSTR pcszCommand, int iShow)
 65 {
 66     TCHAR szAppName[] = TEXT("WSAAsyncSelect");
 67     WNDCLASSEX wndClsEx;
 68 
 69     wndClsEx.cbClsExtra = 0;
 70     wndClsEx.cbSize = sizeof(wndClsEx);
 71     wndClsEx.cbWndExtra = 0;
 72     wndClsEx.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
 73     wndClsEx.hCursor = LoadCursor(NULL, IDC_ARROW);
 74     wndClsEx.hIcon = LoadIcon(NULL, IDI_APPLICATION);
 75     wndClsEx.hIconSm = NULL;
 76     wndClsEx.hInstance = hInstance;
 77     wndClsEx.lpfnWndProc = WinProc;
 78     wndClsEx.lpszClassName = szAppName;
 79     wndClsEx.lpszMenuName = NULL;
 80     wndClsEx.style = CS_HREDRAW | CS_VREDRAW;
 81     
 82     if (!RegisterClassEx(&wndClsEx))
 83     {
 84         MessageBox(NULL, TEXT("注册窗口类失败,本程序需要在Windows NT系统上才能运行。"), TEXT("错误"), MB_OK | MB_ICONERROR);
 85         return 0;
 86     }
 87 
 88     HWND hWnd = CreateWindowEx(
 89         0,
 90         szAppName, 
 91         szAppName,
 92         WS_OVERLAPPEDWINDOW,
 93         CW_USEDEFAULT,
 94         CW_USEDEFAULT,
 95         CW_USEDEFAULT,
 96         CW_USEDEFAULT,
 97         NULL,
 98         NULL,
 99         hInstance,
100         NULL);
101     if (NULL == hWnd)
102     {
103         MessageBox(NULL, TEXT("创建窗口失败"), TEXT("错误"), MB_OK | MB_ICONERROR);
104         return 0;
105     }
106 
107     ShowWindow(hWnd, iShow);
108     UpdateWindow(hWnd);
109 
110     WSADATA wsaData;
111     WSAStartup(WINSOCK_VERSION, &wsaData);
112 
113     SOCKET sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
114     if (INVALID_SOCKET == sListen)
115     {
116         MessageBox(hWnd, TEXT("创建套接字失败"), TEXT("错误"), MB_OK | MB_ICONERROR);
117         WSACleanup();
118         return 0;
119     }
120 
121     SOCKADDR_IN sin;
122     USHORT uPort = 4567;
123     
124     ZeroMemory(&sin, sizeof(sin));
125     sin.sin_family = AF_INET;
126     sin.sin_port = htons(uPort);
127     sin.sin_addr.S_un.S_addr = INADDR_ANY;
128 
129     if (SOCKET_ERROR == bind(sListen, (PSOCKADDR)&sin, sizeof(sin)))
130     {
131         MessageBox(hWnd, TEXT("绑定套接字失败"), TEXT("错误"), MB_OK | MB_ICONERROR);
132         shutdown(sListen, SD_RECEIVE);
133         closesocket(sListen);
134         WSACleanup();
135         return 0;
136     }
137 
138     //将套接字设为窗口通知消息类型
139     WSAAsyncSelect(sListen, hWnd, WM_SOCKET, FD_ACCEPT | FD_CLOSE);
140     listen(sListen, 5);
141 
142     MSG msg;
143     while (GetMessage(&msg, NULL, 0, 0))
144     {
145         TranslateMessage(&msg);
146         DispatchMessage(&msg);
147     }
148 
149     WSACleanup();
150 
151     return msg.wParam;
152 }
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原文地址：https://www.cnblogs.com/qiyueliuguang/p/3502193.html