LOBBY.CPP

/*========================================================================== 
 * 
 *  Copyright (C) 1996-1997 Microsoft Corporation.  All Rights Reserved. 
 * 
 *  File:       lobby.cpp 
 *  Content:Uses information from the lobby to establish a connection. 
 * 
 ***************************************************************************/ 
 
#include <windows.h> 
#include <windowsx.h> 
#include <dplobby.h> 
 
#include "dpchat.h" 
 
HRESULT ConnectUsingLobby(LPDPLAYINFO lpDPInfo) 
{ 
LPDIRECTPLAY2AlpDirectPlay2A = NULL; 
LPDIRECTPLAY3AlpDirectPlay3A = NULL; 
LPDIRECTPLAYLOBBYAlpDirectPlayLobbyA = NULL; 
LPDPLCONNECTIONlpConnectionSettings = NULL; 
DPIDdpidPlayer; 
DWORDdwSize; 
HRESULThr; 
 
// get an ANSI DirectPlay lobby interface 
hr = DirectPlayLobbyCreate(NULL, &lpDirectPlayLobbyA, NULL, NULL, 0); 
if FAILED(hr) 
goto FAILURE; 
 
    // get connection settings from the lobby 
// if this routine returns DPERR_NOTLOBBIED, then a lobby did not 
// launch this application and the user needs to configure the connection. 
 
// pass in a NULL pointer to just get the size of the connection setttings 
hr = lpDirectPlayLobbyA->GetConnectionSettings(0, NULL, &dwSize); 
if (DPERR_BUFFERTOOSMALL != hr) 
goto FAILURE; 
 
// allocate memory for the connection setttings 
lpConnectionSettings = (LPDPLCONNECTION) GlobalAllocPtr(GHND, dwSize); 
if (NULL == lpConnectionSettings) 
{ 
hr = DPERR_OUTOFMEMORY; 
goto FAILURE; 
} 
 
// get the connection settings 
hr = lpDirectPlayLobbyA->GetConnectionSettings(0, lpConnectionSettings, &dwSize); 
if FAILED(hr) 
goto FAILURE; 
 
// before connecting, the game should configure the session description 
// with any settings it needs 
 
// set flags and max players used by the game 
    lpConnectionSettings->lpSessionDesc->dwFlags = DPSESSION_MIGRATEHOST |  
   DPSESSION_KEEPALIVE; 
    lpConnectionSettings->lpSessionDesc->dwMaxPlayers = MAXPLAYERS; 
 
    // store the updated connection settings 
    hr = lpDirectPlayLobbyA->SetConnectionSettings(0, 0, lpConnectionSettings); 
if FAILED(hr) 
goto FAILURE; 
 
// connect to the session - returns an ANSI IDirectPlay2A interface 
hr = lpDirectPlayLobbyA->Connect(0, &lpDirectPlay2A, NULL); 
if FAILED(hr) 
goto FAILURE; 
 
// Obtain an IDirectPlay3A interface, the IDirectPlay2A interface will 
// be released at the end of the function 
hr = lpDirectPlay2A->QueryInterface(IID_IDirectPlay3A, (LPVOID *) &lpDirectPlay3A); 
if FAILED(hr) 
goto FAILURE; 
 
// create a player with the name returned in the connection settings 
hr = lpDirectPlay3A->CreatePlayer(&dpidPlayer, 
lpConnectionSettings->lpPlayerName,  
lpDPInfo->hPlayerEvent, NULL, 0, 0); 
if FAILED(hr) 
goto FAILURE; 
 
// return connection info 
lpDPInfo->lpDirectPlay3A = lpDirectPlay3A; 
lpDPInfo->dpidPlayer = dpidPlayer; 
if (lpConnectionSettings->dwFlags & DPLCONNECTION_CREATESESSION) 
lpDPInfo->bIsHost = TRUE; 
else 
lpDPInfo->bIsHost = FALSE; 
 
lpDirectPlay3A = NULL;// set to NULL here so it won't release below 
 
FAILURE: 
if (lpDirectPlay2A) 
lpDirectPlay2A->Release(); 
 
if (lpDirectPlay3A) 
lpDirectPlay3A->Release(); 
 
if (lpDirectPlayLobbyA) 
lpDirectPlayLobbyA->Release(); 
 
if (lpConnectionSettings) 
GlobalFreePtr(lpConnectionSettings); 
 
return (hr); 
}