Winsock
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This document discusses Winsock and network programming in C++. It introduces several important Winsock functions like WSAStartup(), WSAAsyncSelect(), and WSACleanup() for initializing, asynchronous event handling, and cleaning up Winsock. It also summarizes common network events like FD_READ, FD_WRITE, and FD_CONNECT. The document provides an example of using EditPrintf() to print log messages and discusses handling client connections and requests in the FD_READ callback. It also mentions using MFC's CSocket class for socket programming and overriding functions like OnAccept.
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Winsock
- 1. Winsock
- 2. OutLine Winsock Introduction Project#3 Template MFC CSocket Demo hint
- 3. Winsock Introduction (See testMain) int APIENTRY _tWinMain(…) main routine make hInstance maps to WndProc while loop for wait message BOOL InitInstance(HINSTANCE , int) CreateWindow Show Window LRESULT CALLBACK WndProc( …) Handle message
- 4. Winsock Introduction WSAStartup( … ) 通知 Windows Sockets 應用程式要開始網路服務 WSAAsyncSelect (…) WSACleanup() 結束 Windows Sockets 的使用 WSAGETSELECTEVENT(lParam) extract the event code from the lParam in the response to a WSAAsyncSelect() LOWORD(lParam)
- 5. Events FD_READ: FD_WRITE: FD_CONNECT: FD_ACCEPT: FD_CLOSE:
- 6. Project#3 Template EditPrintf (HWND hwndEdit, TCHAR * szFormat, ...) EditPrintf(hwndEdit, TEXT("=== Server START ===\r\n")); EditPrintf(hwndEdit, TEXT("=== Accept one new client(%d), List size:%d ===\r\n"), ssock, Socks.size()); case ID_LISTEN: Press the “Listen” button The button’s ID is “ ID_LISTEN ” WM_USER => 0x0400 All Message Numbers below 0x0400 are RESERVED.
- 7. To Do Fill actions when event happen When FD_READ/FD_WRITE happen ? GET action Target Server I/O Handle them same place ? Handle htm & cgi
- 8. MFC CSocket 繼承 CSocket 類別 覆寫 OnAccept 等 function
- 11. Demo hint 可以用作業二的任一 Server, 但不能重開 有把握的話 ,Test_case 1&2 可以一起測 Delayed server code 和 hide testcase 會在 demo 前幾天公怖 Timeout 機制請做成選項 還要說明如何做