LinkBack URL
About LinkBacks
im trying to make a Simple Client - Server application using Async Sockets, that will support Multiple connection on server side
i have read several tutorials and examples on the net but i have some problems and i hope some1 can help me fix them
1) When i close Server or Client , i cannot reconnect back , even with FD_CLOSE event code
2) FD_ACCEPT: doesn't display a message box when its connected , why is there something wrong?
3) Does this Server code is able to accept multiple connection at once? or ill need to recall the listen function each time i make a connection?
the code doesn't have anything more that sockets initialization and connection
hope some1 can point out the code errors.
Server Code
Client CodeCode:#include <winsock2.h> #include <windows.h> #pragma comment(lib,"wsock32.lib") #define WM_WSAASYNC (WM_USER +1) #define WM_SOCKET 104 LRESULT CALLBACK WinProc(HWND hWnd,UINT message,WPARAM wParam,LPARAM lParam); void SockInit(HWND hwnd); void SockListen(HWND hWnd); SOCKET hSock; SOCKET sTemp; SOCKADDR_IN ServAdr; sockaddr sockAddrClient; int SPort = 4455; void SockListen(HWND hWnd) { hSock = socket(AF_INET,SOCK_STREAM,0); WSAAsyncSelect(hSock,hWnd,WM_WSAASYNC,FD_ACCEPT|FD_CLOSE|FD_READ); ServAdr.sin_family=AF_INET; ServAdr.sin_addr.s_addr=htonl(INADDR_ANY); ServAdr.sin_port=htons(SPort); bind(hSock,(LPSOCKADDR)&ServAdr,sizeof(struct sockaddr)); listen(hSock, 1); } void SockInit(HWND hwnd) { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD( 2, 0 ); err = WSAStartup( wVersionRequested, &wsaData ); if ( err != 0 ) PostQuitMessage(1); if ( LOBYTE( wsaData.wVersion ) != 2 || HIBYTE( wsaData.wVersion ) != 0 ) { WSACleanup(); PostQuitMessage(0); } } LRESULT CALLBACK WinProc(HWND hWnd,UINT msg,WPARAM wParam,LPARAM lParam) { switch(msg) { case WM_CREATE: { SockInit(hWnd); SockListen(hWnd); } break; case WM_DESTROY: { PostQuitMessage(0); shutdown(wParam,SD_BOTH); closesocket(wParam); WSACleanup(); return 0; } break; case WM_SOCKET: { switch(WSAGETSELECTEVENT(lParam)) { case FD_ACCEPT: { int size=sizeof(sockaddr); sTemp = accept(wParam,&sockAddrClient,&size); MessageBox(hWnd,"Server Accepted","Connection!",MB_ICONINFORMATION|MB_OK); } break; case FD_READ: { //Not done yet } break; case FD_CLOSE: { WSACleanup(); closesocket(wParam); } break; } } } return(DefWindowProc(hWnd, msg, wParam, lParam)); } int WINAPI WinMain(HINSTANCE hInst,HINSTANCE hPrevInst,LPSTR lpCmdLine,int nShowCmd) { MSG msgs; HWND hwnd; WNDCLASSEX wClass; ZeroMemory(&wClass,sizeof(WNDCLASSEX)); wClass.cbClsExtra=NULL; wClass.cbSize=sizeof(WNDCLASSEX); wClass.cbWndExtra=NULL; wClass.hbrBackground=(HBRUSH)COLOR_WINDOW; wClass.hCursor=LoadCursor(NULL,IDC_ARROW); wClass.hIcon=NULL; wClass.hIconSm=NULL; wClass.hInstance=hInst; wClass.lpfnWndProc=(WNDPROC)WinProc; wClass.lpszClassName="Window Class"; wClass.lpszMenuName=NULL; wClass.style=CS_HREDRAW|CS_VREDRAW; RegisterClassEx(&wClass); HWND hWnd=CreateWindowEx(NULL,"Window Class","Client",WS_OVERLAPPEDWINDOW, //WS_POPUP | WS_VISIBLE 400, 200, 500, 300,NULL,NULL,hInst,NULL); ShowWindow(hWnd,nShowCmd); ZeroMemory(&msgs,sizeof(UINT)); while(GetMessage(&msgs,NULL,0,0)) { TranslateMessage(&msgs); DispatchMessage(&msgs); } return 0; }
Code:#include <winsock2.h> #include <windows.h> #pragma comment(lib,"wsock32.lib") #define WM_WSAASYNC (WM_USER +1) #define WM_SOCKET 104 LRESULT CALLBACK WinProc(HWND hWnd,UINT message,WPARAM wParam,LPARAM lParam); void SockInit(HWND hwnd); void SockListen(HWND hWnd); void CloseSocket(); SOCKET hSock; SOCKADDR_IN ServAdr; int SPort = 4455; void Connect(HWND hWnd) { int ConRes; Sleep(1000); begin: Sleep(1000); ServAdr.sin_family = AF_INET; ServAdr.sin_addr.s_addr=inet_addr("127.0.0.1"); ServAdr.sin_port = htons (SPort); hSock = socket (AF_INET,SOCK_STREAM,0); ConRes=connect (hSock, (struct sockaddr *)&ServAdr,sizeof(ServAdr)); if (ConRes==-1) { goto begin; } else { WSAAsyncSelect(hSock,hWnd,WM_WSAASYNC,FD_READ|FD_CLOSE|FD_CONNECT); } return; } void SockInit(HWND hwnd) { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD( 2, 0 ); err = WSAStartup( wVersionRequested, &wsaData ); if ( err != 0 ) PostQuitMessage(1); if ( LOBYTE( wsaData.wVersion ) != 2 || HIBYTE( wsaData.wVersion ) != 0 ) { WSACleanup(); PostQuitMessage(0); } } LRESULT CALLBACK WinProc(HWND hWnd,UINT msg,WPARAM wParam,LPARAM lParam) { switch(msg) { case WM_CREATE: { SockInit(hWnd); Connect(hWnd); } break; case WM_DESTROY: { PostQuitMessage(0); shutdown(wParam,SD_BOTH); closesocket(wParam); WSACleanup(); return 0; } break; case WM_SOCKET: { switch(WSAGETSELECTEVENT(lParam)) { case FD_CONNECT: { MessageBox(hWnd,"Server connected","Connection!",MB_ICONINFORMATION|MB_OK); } break; case FD_READ: { //Not done yet } break; case FD_CLOSE: { WSACleanup(); closesocket(wParam); Connect(hWnd); } break; } } } return(DefWindowProc(hWnd, msg, wParam, lParam)); } int WINAPI WinMain(HINSTANCE hInst,HINSTANCE hPrevInst,LPSTR lpCmdLine,int nShowCmd) { MSG msgs; HWND hwnd; WNDCLASSEX wClass; ZeroMemory(&wClass,sizeof(WNDCLASSEX)); wClass.cbClsExtra=NULL; wClass.cbSize=sizeof(WNDCLASSEX); wClass.cbWndExtra=NULL; wClass.hbrBackground=(HBRUSH)COLOR_WINDOW; wClass.hCursor=LoadCursor(NULL,IDC_ARROW); wClass.hIcon=NULL; wClass.hIconSm=NULL; wClass.hInstance=hInst; wClass.lpfnWndProc=(WNDPROC)WinProc; wClass.lpszClassName="Window Class"; wClass.lpszMenuName=NULL; wClass.style=CS_HREDRAW|CS_VREDRAW; RegisterClassEx(&wClass); HWND hWnd=CreateWindowEx(NULL,"Window Class","Server",WS_OVERLAPPEDWINDOW, //WS_POPUP | WS_VISIBLE 400, 200, 300, 100,NULL,NULL,hInst,NULL); ShowWindow(hWnd,nShowCmd); ZeroMemory(&msgs,sizeof(UINT)); while(GetMessage(&msgs,NULL,0,0)) { TranslateMessage(&msgs); DispatchMessage(&msgs); } return 0; }
Originally Posted by Cactus_Hugger 
