962 lines
24 KiB
C++
962 lines
24 KiB
C++
/***************************************************************************
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*
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* Copyright (C) 2001-2002 Microsoft Corporation. All Rights Reserved.
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*
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* File: dpnhpastdllmain.cpp
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*
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* Content: DPNHPAST DLL entry points.
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*
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* History:
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* Date By Reason
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* ======== ======== =========
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* 04/16/01 VanceO Split DPNATHLP into DPNHUPNP and DPNHPAST.
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*
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***************************************************************************/
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#include "dpnhpasti.h"
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//=============================================================================
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// External globals
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//=============================================================================
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volatile LONG g_lOutstandingInterfaceCount = 0; // number of outstanding interfaces
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DNCRITICAL_SECTION g_csGlobalsLock; // lock protecting all of the following globals
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CBilink g_blNATHelpPASTObjs; // bilink of all the NATHelpPAST interface objects
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DWORD g_dwHoldRand; // current random number sequence
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DWORD g_dwPASTICSMode; // whether using PAST ICS is enabled or not
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DWORD g_dwPASTPFWMode; // whether using PAST PFW is enabled or not
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INT g_iUnicastTTL = 1; // unicast TTL value, or 0 to use default set by OS; normally we use 1
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DWORD g_dwDefaultGatewayV4 = INADDR_BROADCAST; // default to broadcasting when searching for PAST server
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DWORD g_dwSubnetMaskV4 = 0x00FFFFFF; // = 0xFFFFFF00 in Intel order = 255.255.255.0, a class C network
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DWORD g_dwNoActiveNotifyPollInterval = 25000; // start by polling every 25 seconds
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DWORD g_dwMinUpdateServerStatusInterval = 1000; // don't hit the network more often than every 1 second
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DWORD g_dwPollIntervalBackoff = 30000; // backoff an additional 0 to 30 seconds if no network changes occur
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DWORD g_dwMaxPollInterval = 300000; // don't go more than 5 minutes without polling
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BOOL g_fKeepPollingForRemoteGateway = FALSE; // whether to continue to search for new Internet gateway devices if none were found during startup
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DWORD g_dwReusePortTime = 60000; // how long to keep using the same port for polling remote Internet gateway devices (default is 1 minute)
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DWORD g_dwCacheLifeFound = 30000; // how long to cache QueryAddress results where the address was found
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DWORD g_dwCacheLifeNotFound = 30000; // how long to cache QueryAddress results where the address was not found
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//=============================================================================
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// Defines
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//=============================================================================
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#define REGKEY_VALUE_GUID L"Guid"
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#define REGKEY_VALUE_DIRECTPLAY8PRIORITY L"DirectPlay8Priority"
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#define REGKEY_VALUE_DIRECTPLAY8INITFLAGS L"DirectPlay8InitFlags"
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#define REGKEY_VALUE_PASTICSMODE L"PASTICSMode"
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#define REGKEY_VALUE_PASTPFWMODE L"PASTPFWMode"
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#define REGKEY_VALUE_UNICASTTTL L"UnicastTTL"
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#define REGKEY_VALUE_DEFAULTGATEWAYV4 L"GatewayV4"
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#define REGKEY_VALUE_SUBNETMASKV4 L"SubnetMaskV4"
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#define REGKEY_VALUE_NOACTIVENOTIFYPOLLINTERVAL L"NoActiveNotifyPollInterval"
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#define REGKEY_VALUE_MINUPDATESERVERSTATUSINTERVAL L"MinUpdateServerStatusInterval"
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#define REGKEY_VALUE_POLLINTERVALBACKOFF L"PollIntervalBackoff"
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#define REGKEY_VALUE_MAXPOLLINTERVAL L"MaxPollInterval"
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#define REGKEY_VALUE_KEEPPOLLINGFORREMOTEGATEWAY L"KeepPollingForRemoteGateway"
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#define REGKEY_VALUE_REUSEPORTTIME L"ReusePortTime"
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#define REGKEY_VALUE_CACHELIFEFOUND L"CacheLifeFound"
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#define REGKEY_VALUE_CACHELIFENOTFOUND L"CacheLifeNotFound"
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#define DEFAULT_DIRECTPLAY8PRIORITY 2
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#define DEFAULT_DIRECTPLAY8INITFLAGS DPNHINITIALIZE_DISABLELOCALFIREWALLSUPPORT
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//=============================================================================
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// Local prototypes
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//=============================================================================
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BOOL InitializeProcessGlobals(void);
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void CleanupProcessGlobals(void);
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void InitializeGlobalRand(const DWORD dwSeed);
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#undef DPF_MODNAME
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#define DPF_MODNAME "DllMain"
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//=============================================================================
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// DllMain
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//-----------------------------------------------------------------------------
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//
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// Description: DLL entry point.
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//
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// Arguments:
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// HANDLE hDllInst - Handle to this DLL module.
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// DWORD dwReason - Reason for calling this function.
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// LPVOID lpvReserved - Reserved.
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//
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// Returns: TRUE if all goes well, FALSE otherwise.
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//=============================================================================
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BOOL WINAPI DllMain(HANDLE hDllInst,
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DWORD dwReason,
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LPVOID lpvReserved)
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{
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BOOL fResult = TRUE;
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switch (dwReason)
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{
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case DLL_PROCESS_ATTACH:
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{
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DPFX(DPFPREP, 2, "====> ENTER: DLLMAIN(%p): Process Attach: %08lx, tid=%08lx",
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DllMain, GetCurrentProcessId(), GetCurrentThreadId());
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//
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// Ignore thread attach/detach messages.
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//
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DisableThreadLibraryCalls((HMODULE) hDllInst);
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//
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// Attempt to initialize the OS abstraction layer.
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//
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if (DNOSIndirectionInit(0))
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{
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//
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// Attempt to initialize process-global items.
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//
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if (! InitializeProcessGlobals())
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{
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DPFX(DPFPREP, 0, "Failed to initialize globals!");
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DNOSIndirectionDeinit();
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fResult = FALSE;
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}
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}
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else
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{
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DPFX(DPFPREP, 0, "Failed to initialize OS indirection layer!");
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fResult = FALSE;
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}
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break;
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}
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case DLL_THREAD_ATTACH:
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{
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//
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// Ignore.
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//
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break;
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}
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case DLL_THREAD_DETACH:
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{
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//
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// Ignore.
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//
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break;
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}
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case DLL_PROCESS_DETACH:
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{
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DPFX(DPFPREP, 2, "====> EXIT: DLLMAIN(%p): Process Detach %08lx, tid=%08lx",
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DllMain, GetCurrentProcessId(), GetCurrentThreadId());
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CleanupProcessGlobals();
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DNOSIndirectionDeinit();
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break;
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}
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default:
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{
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DNASSERT(FALSE);
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break;
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}
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}
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return fResult;
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} // DllMain
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#ifndef DPNBUILD_NOCOMREGISTER
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#undef DPF_MODNAME
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#define DPF_MODNAME "DllRegisterServer"
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//=============================================================================
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// DllRegisterServer
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//-----------------------------------------------------------------------------
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//
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// Description: Registers the DirectPlay NAT Helper PAST COM object.
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//
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// Arguments: None.
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//
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// Returns: HRESULT
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// S_OK - Successfully unregistered DirectPlay NAT Helper PAST.
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// E_FAIL - Failed unregistering DirectPlay NAT Helper PAST.
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//=============================================================================
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HRESULT WINAPI DllRegisterServer(void)
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{
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CRegistry RegObject;
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//
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// Register this COM object CLSID.
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//
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if (! CRegistry::Register(L"DirectPlayNATHelperPAST.1",
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L"DirectPlay NAT Helper PAST Object",
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L"dpnhpast.dll",
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&CLSID_DirectPlayNATHelpPAST,
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L"DirectPlayNATHelperPAST"))
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{
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DPFX(DPFPREP, 0, "Could not register DirectPlay NAT Helper PAST object!");
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return E_FAIL;
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}
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//
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// Write this object's GUID and DirectPlay8 availability to the registry.
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//
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if (! RegObject.Open(HKEY_LOCAL_MACHINE, DIRECTPLAYNATHELP_REGKEY L"\\" REGKEY_COMPONENTSUBKEY, FALSE, TRUE))
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{
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DPFX(DPFPREP, 0, "Couldn't create DirectPlay NAT Helper PAST key!");
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return E_FAIL;
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}
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if (! RegObject.WriteGUID(REGKEY_VALUE_GUID, CLSID_DirectPlayNATHelpPAST))
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{
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DPFX(DPFPREP, 0, "Couldn't write GUID to registry!");
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return E_FAIL;
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}
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if (! RegObject.WriteDWORD(REGKEY_VALUE_DIRECTPLAY8PRIORITY, DEFAULT_DIRECTPLAY8PRIORITY))
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{
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DPFX(DPFPREP, 0, "Couldn't write DirectPlay8 priority to registry!");
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return E_FAIL;
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}
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if (! RegObject.WriteDWORD(REGKEY_VALUE_DIRECTPLAY8INITFLAGS, DEFAULT_DIRECTPLAY8INITFLAGS))
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{
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DPFX(DPFPREP, 0, "Couldn't write DirectPlay8 init flags to registry!");
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return E_FAIL;
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}
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RegObject.Close();
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return S_OK;
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} // DllRegisterServer
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#undef DPF_MODNAME
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#define DPF_MODNAME "DllUnregisterServer"
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//=============================================================================
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// DllUnregisterServer
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//-----------------------------------------------------------------------------
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//
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// Description: Unregisters the DirectPlay NAT Helper PAST COM object.
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//
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// Arguments: None.
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//
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// Returns: HRESULT
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// S_OK - Successfully unregistered DirectPlay NAT Helper PAST.
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// E_FAIL - Failed unregistering DirectPlay NAT Helper PAST.
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//=============================================================================
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STDAPI DllUnregisterServer(void)
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{
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CRegistry RegObject;
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//
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// Unregister the class.
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//
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if (! CRegistry::UnRegister(&CLSID_DirectPlayNATHelpPAST))
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{
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DPFX(DPFPREP, 0, "Failed to unregister DirectPlay NAT Helper PAST object!");
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return E_FAIL;
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}
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//
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// Try removing all the subitems we registered.
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//
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if (! RegObject.Open(HKEY_LOCAL_MACHINE, DIRECTPLAYNATHELP_REGKEY L"\\" REGKEY_COMPONENTSUBKEY, FALSE, FALSE))
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{
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DPFX(DPFPREP, 0, "Couldn't open DirectPlay NAT Helper key! Ignoring.");
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}
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else
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{
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if (! RegObject.DeleteValue(REGKEY_VALUE_GUID))
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{
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DPFX(DPFPREP, 0, "Couldn't delete GUID registry value! Ignoring.");
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}
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if (! RegObject.DeleteValue(REGKEY_VALUE_DIRECTPLAY8PRIORITY))
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{
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DPFX(DPFPREP, 0, "Couldn't delete DirectPlay8 priority registry value! Ignoring.");
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}
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if (! RegObject.DeleteValue(REGKEY_VALUE_DIRECTPLAY8INITFLAGS))
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{
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DPFX(DPFPREP, 0, "Couldn't delete DirectPlay8 init flags registry value! Ignoring.");
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}
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RegObject.Close();
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}
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return S_OK;
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} // DllUnregisterServer
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#endif // !DPNBUILD_NOCOMREGISTER
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#ifndef WINCE
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#undef DPF_MODNAME
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#define DPF_MODNAME "DirectPlayNATHelpCreate"
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//=============================================================================
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// DirectPlayNATHelpCreate
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//-----------------------------------------------------------------------------
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//
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// Description: Creates an IDirectPlayNATHelp interface object.
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//
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// Arguments:
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// GUID * pIID - Pointer to IDirectPlayNATHelp interface GUID.
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// void ** ppvInterface - Place to store pointer to interface object
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// created.
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//
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// Returns: HRESULT
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// DPNH_OK - Creating the object was successful.
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// DPNHERR_INVALIDPOINTER - The destination pointer is invalid.
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// DPNHERR_OUTOFMEMORY - Not enough memory to create the object.
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// E_NOINTERFACE - The requested interface was invalid.
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//=============================================================================
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HRESULT WINAPI DirectPlayNATHelpCreate(const GUID * pIID, void ** ppvInterface)
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{
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HRESULT hr;
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DPFX(DPFPREP, 2, "Parameters: (0x%p, 0x%p)", pIID, ppvInterface);
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hr = DoCreateInstance(NULL, // no class factory object necessary
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NULL, // ?
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CLSID_DirectPlayNATHelpPAST, // DirectPlayNATHelp class
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(*pIID), // requested interface
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ppvInterface); // place to store interface
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DPFX(DPFPREP, 2, "Returning: [0x%lx]", hr);
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return hr;
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} // DirectPlayNATHelpCreate
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#endif // !WINCE
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#undef DPF_MODNAME
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#define DPF_MODNAME "InitializeProcessGlobals"
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//=============================================================================
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// InitializeProcessGlobals
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//-----------------------------------------------------------------------------
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//
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// Description: Initialize global items needed for the DLL to operate.
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//
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// Arguments: None.
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//
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// Returns: TRUE if successful, FALSE if an error occurred.
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//=============================================================================
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BOOL InitializeProcessGlobals(void)
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{
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BOOL fReturn = TRUE;
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if (! DNInitializeCriticalSection(&g_csGlobalsLock))
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{
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fReturn = FALSE;
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}
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//
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// Don't allow critical section reentry.
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//
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DebugSetCriticalSectionRecursionCount(&g_csGlobalsLock, 0);
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g_blNATHelpPASTObjs.Initialize();
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//
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// Seed the random number generator with the current time.
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//
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InitializeGlobalRand(GETTIMESTAMP());
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return fReturn;
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} // InitializeProcessGlobals
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#undef DPF_MODNAME
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#define DPF_MODNAME "CleanupProcessGlobals"
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//=============================================================================
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// CleanupProcessGlobals
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//-----------------------------------------------------------------------------
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//
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// Description: Releases global items used by DLL.
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//
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// Arguments: None.
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//
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// Returns: None.
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//=============================================================================
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void CleanupProcessGlobals(void)
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{
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CBilink * pBilink;
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CNATHelpPAST * pNATHelpPAST;
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if (! g_blNATHelpPASTObjs.IsEmpty())
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{
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//
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// This assert is far more descriptive than hitting one of those in the
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// cleanup code that complain about flags incorrectly being set.
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//
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DNASSERT(! "DPNHPAST.DLL unloading without all objects having been released! The caller's DirectPlayNATHelpPAST cleanup code needs to be fixed!");
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//
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// Force close all the objects still outstanding.
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//
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pBilink = g_blNATHelpPASTObjs.GetNext();
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while (pBilink != &g_blNATHelpPASTObjs)
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{
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pNATHelpPAST = NATHELPPAST_FROM_BILINK(pBilink);
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pBilink = pBilink->GetNext();
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DPFX(DPFPREP, 0, "Forcefully releasing object 0x%p!", pNATHelpPAST);
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pNATHelpPAST->Close(0); // ignore error
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//
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// Forcefully remove it from the list and delete it instead of
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// using pNATHelpPAST->Release().
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//
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pNATHelpPAST->m_blList.RemoveFromList();
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pNATHelpPAST->UninitializeObject();
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delete pNATHelpPAST;
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}
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}
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DNDeleteCriticalSection(&g_csGlobalsLock);
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} // CleanupProcessGlobals
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#undef DPF_MODNAME
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#define DPF_MODNAME "ReadRegistrySettings"
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//=============================================================================
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// ReadRegistrySettings
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//-----------------------------------------------------------------------------
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//
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// Description: Reads registry settings to override behavior of this DLL and to
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// turn on some debugging features.
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//
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// Arguments: None.
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//
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// Returns: None.
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//=============================================================================
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void ReadRegistrySettings(void)
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{
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CRegistry RegObject;
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DWORD dwNewValue;
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BOOL fNewValue;
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//
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// Try opening the registry key.
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//
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if (RegObject.Open(HKEY_LOCAL_MACHINE, DIRECTPLAYNATHELP_REGKEY L"\\" REGKEY_COMPONENTSUBKEY) != FALSE)
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{
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//
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// Lock out other interfaces from modifying the globals simultaneously.
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//
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DNEnterCriticalSection(&g_csGlobalsLock);
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//
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// If we successfully read a new mode, save it.
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//
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if (RegObject.ReadDWORD(REGKEY_VALUE_PASTICSMODE, &dwNewValue))
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{
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g_dwPASTICSMode = dwNewValue;
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DPFX(DPFPREP, 1, "Using PAST ICS mode %u.", g_dwPASTICSMode);
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}
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//
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// If we successfully read a new mode, save it.
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//
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if (RegObject.ReadDWORD(REGKEY_VALUE_PASTPFWMODE, &dwNewValue))
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{
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g_dwPASTPFWMode = dwNewValue;
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DPFX(DPFPREP, 1, "Using PAST PFW mode %u.", g_dwPASTPFWMode);
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}
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//
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// If we successfully read a new value, save it.
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//
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if (RegObject.ReadDWORD(REGKEY_VALUE_UNICASTTTL, &dwNewValue))
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{
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g_iUnicastTTL = dwNewValue;
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if (g_iUnicastTTL != 0)
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{
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DPFX(DPFPREP, 1, "Using unicast TTL of %i.", g_iUnicastTTL);
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}
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else
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{
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DPFX(DPFPREP, 1, "Using OS default unicast TTL.");
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}
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}
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//
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// If we successfully read a new default gateway, save it.
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//
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if (RegObject.ReadDWORD(REGKEY_VALUE_DEFAULTGATEWAYV4, &dwNewValue))
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{
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g_dwDefaultGatewayV4 = dwNewValue;
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DPFX(DPFPREP, 1, "Using default gateway 0x%08lx.", g_dwDefaultGatewayV4);
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}
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//
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// If we successfully read a new mask, save it.
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//
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if (RegObject.ReadDWORD(REGKEY_VALUE_SUBNETMASKV4, &dwNewValue))
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{
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g_dwSubnetMaskV4 = dwNewValue;
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DPFX(DPFPREP, 1, "Using subnet mask 0x%08lx.", g_dwSubnetMaskV4);
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}
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//
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// If we successfully read a new interval, save it.
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//
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if (RegObject.ReadDWORD(REGKEY_VALUE_NOACTIVENOTIFYPOLLINTERVAL, &dwNewValue))
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{
|
|
g_dwNoActiveNotifyPollInterval = dwNewValue;
|
|
DPFX(DPFPREP, 1, "Using no-active-notify recommended poll interval %u ms.", g_dwNoActiveNotifyPollInterval);
|
|
}
|
|
|
|
|
|
//
|
|
// If we successfully read a new interval, save it.
|
|
//
|
|
if (RegObject.ReadDWORD(REGKEY_VALUE_MINUPDATESERVERSTATUSINTERVAL, &dwNewValue))
|
|
{
|
|
g_dwMinUpdateServerStatusInterval = dwNewValue;
|
|
DPFX(DPFPREP, 1, "Using minimum update-server-status interval %u ms.", g_dwMinUpdateServerStatusInterval);
|
|
}
|
|
|
|
|
|
//
|
|
// If we successfully read a new value, save it.
|
|
//
|
|
if (RegObject.ReadDWORD(REGKEY_VALUE_POLLINTERVALBACKOFF, &dwNewValue))
|
|
{
|
|
if (dwNewValue != 0)
|
|
{
|
|
g_dwPollIntervalBackoff = dwNewValue;
|
|
DPFX(DPFPREP, 1, "Using poll interval backoff between 0 and %u ms.",
|
|
g_dwPollIntervalBackoff);
|
|
}
|
|
else
|
|
{
|
|
DPFX(DPFPREP, 0, "Ignoring invalid poll interval backoff setting, using default between 0 and %u ms!",
|
|
g_dwPollIntervalBackoff);
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
// If we successfully read a new interval, save it.
|
|
//
|
|
if (RegObject.ReadDWORD(REGKEY_VALUE_MAXPOLLINTERVAL, &dwNewValue))
|
|
{
|
|
//
|
|
// Make sure the value is greater than the starting value.
|
|
//
|
|
if (dwNewValue >= g_dwNoActiveNotifyPollInterval)
|
|
{
|
|
g_dwMaxPollInterval = dwNewValue;
|
|
DPFX(DPFPREP, 1, "Using max poll interval of %u ms.",
|
|
g_dwMaxPollInterval);
|
|
}
|
|
else
|
|
{
|
|
g_dwMaxPollInterval = g_dwNoActiveNotifyPollInterval;
|
|
DPFX(DPFPREP, 0, "Ignoring max poll interval of %u ms, the starting value is %u ms.",
|
|
g_dwMaxPollInterval);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// Make sure the max poll interval default value is greater than
|
|
// the starting value because we may have read in a new
|
|
// g_dwNoActiveNotifyPollInterval that makes the default
|
|
// g_dwMaxPollInterval invalid.
|
|
//
|
|
if (g_dwMaxPollInterval < g_dwNoActiveNotifyPollInterval)
|
|
{
|
|
g_dwMaxPollInterval = g_dwNoActiveNotifyPollInterval;
|
|
DPFX(DPFPREP, 0, "Resetting max poll interval to %u ms so as to meet starting value.",
|
|
g_dwMaxPollInterval);
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
// If we successfully read a new boolean, save it.
|
|
//
|
|
if (RegObject.ReadBOOL(REGKEY_VALUE_KEEPPOLLINGFORREMOTEGATEWAY, &fNewValue))
|
|
{
|
|
g_fKeepPollingForRemoteGateway = fNewValue;
|
|
if (g_fKeepPollingForRemoteGateway)
|
|
{
|
|
DPFX(DPFPREP, 1, "Will continue to poll for remote gateways.");
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// This is actually default behavior, but print out a statement
|
|
// anyway.
|
|
//
|
|
DPFX(DPFPREP, 1, "Continually polling for remote gateways is disallowed by registry key.");
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
// If we successfully read a new value, save it.
|
|
//
|
|
if (RegObject.ReadDWORD(REGKEY_VALUE_REUSEPORTTIME, &dwNewValue))
|
|
{
|
|
g_dwReusePortTime = dwNewValue;
|
|
DPFX(DPFPREP, 1, "Reusing remote gateway discovery ports for %u ms.",
|
|
g_dwReusePortTime);
|
|
}
|
|
|
|
|
|
//
|
|
// If we successfully read a new value, save it.
|
|
//
|
|
if (RegObject.ReadDWORD(REGKEY_VALUE_CACHELIFEFOUND, &dwNewValue))
|
|
{
|
|
g_dwCacheLifeFound = dwNewValue;
|
|
DPFX(DPFPREP, 1, "Caching found addresses for %u ms.",
|
|
g_dwCacheLifeFound);
|
|
}
|
|
|
|
|
|
//
|
|
// If we successfully read a new value, save it.
|
|
//
|
|
if (RegObject.ReadDWORD(REGKEY_VALUE_CACHELIFENOTFOUND, &dwNewValue))
|
|
{
|
|
g_dwCacheLifeNotFound = dwNewValue;
|
|
DPFX(DPFPREP, 1, "Caching not-found addresses for %u ms.",
|
|
g_dwCacheLifeNotFound);
|
|
}
|
|
|
|
|
|
//
|
|
// Okay, we're done. Drop the lock.
|
|
//
|
|
DNLeaveCriticalSection(&g_csGlobalsLock);
|
|
|
|
|
|
//
|
|
// Done reading registry.
|
|
//
|
|
RegObject.Close();
|
|
}
|
|
} // ReadRegistrySettings
|
|
|
|
|
|
|
|
|
|
|
|
#undef DPF_MODNAME
|
|
#define DPF_MODNAME "InitializeGlobalRand"
|
|
//=============================================================================
|
|
// InitializeGlobalRand
|
|
//-----------------------------------------------------------------------------
|
|
//
|
|
// Description: Initializes the fallback global psuedo-random number
|
|
// generator, using the given seed value.
|
|
//
|
|
// Arguments:
|
|
// DWORD dwSeed - Seed to use.
|
|
//
|
|
// Returns: None.
|
|
//=============================================================================
|
|
void InitializeGlobalRand(const DWORD dwSeed)
|
|
{
|
|
//
|
|
// We don't need to hold a lock, since this should only be done once,
|
|
// during initialization time.
|
|
//
|
|
g_dwHoldRand = dwSeed;
|
|
} // InitializeGlobalRand
|
|
|
|
|
|
|
|
|
|
|
|
#undef DPF_MODNAME
|
|
#define DPF_MODNAME "GetGlobalRand"
|
|
//=============================================================================
|
|
// GetGlobalRand
|
|
//-----------------------------------------------------------------------------
|
|
//
|
|
// Description: Generates a pseudo-random DWORD.
|
|
//
|
|
// Arguments: None.
|
|
//
|
|
// Returns: Pseudo-random number.
|
|
//=============================================================================
|
|
DWORD GetGlobalRand(void)
|
|
{
|
|
HCRYPTPROV hCryptProv;
|
|
DWORD dwResult;
|
|
WORD wResult1;
|
|
WORD wResult2;
|
|
#ifdef DBG
|
|
DWORD dwError;
|
|
#endif // DBG
|
|
|
|
|
|
if (CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT))
|
|
{
|
|
if (CryptGenRandom(hCryptProv, sizeof(dwResult), (BYTE*) (&dwResult)))
|
|
{
|
|
CryptReleaseContext(hCryptProv, 0);
|
|
return dwResult;
|
|
}
|
|
#ifdef DBG
|
|
else
|
|
{
|
|
dwError = GetLastError();
|
|
DPFX(DPFPREP, 0, "Crypto couldn't generate random number (err = %u)!",
|
|
dwError);
|
|
}
|
|
#endif // DBG
|
|
|
|
CryptReleaseContext(hCryptProv, 0);
|
|
}
|
|
#ifdef DBG
|
|
else
|
|
{
|
|
dwError = GetLastError();
|
|
DPFX(DPFPREP, 0, "Couldn't acquire crypto provider context (err = %u)!",
|
|
dwError);
|
|
}
|
|
#endif // DBG
|
|
|
|
|
|
//
|
|
// We couldn't use the crypto API to generate a random number, so make
|
|
// our own based off the C run time source.
|
|
//
|
|
|
|
DNEnterCriticalSection(&g_csGlobalsLock);
|
|
|
|
g_dwHoldRand = ((g_dwHoldRand * 214013L + 2531011L) >> 16) & 0x7fff;
|
|
wResult1 = (WORD) g_dwHoldRand;
|
|
g_dwHoldRand = ((g_dwHoldRand * 214013L + 2531011L) >> 16) & 0x7fff;
|
|
wResult2 = (WORD) g_dwHoldRand;
|
|
|
|
DNLeaveCriticalSection(&g_csGlobalsLock);
|
|
|
|
return MAKELONG(wResult1, wResult2);
|
|
} // GetGlobalRand
|
|
|
|
|
|
|
|
|
|
#undef DPF_MODNAME
|
|
#define DPF_MODNAME "DoCreateInstance"
|
|
//=============================================================================
|
|
// DoCreateInstance
|
|
//-----------------------------------------------------------------------------
|
|
//
|
|
// Description: Creates an instance of an interface. Required by the general
|
|
// purpose class factory functions.
|
|
//
|
|
// Arguments:
|
|
// LPCLASSFACTORY This - Pointer to class factory.
|
|
// LPUNKNOWN pUnkOuter - Pointer to unknown interface.
|
|
// REFCLSID rclsid - Reference of GUID of desired interface.
|
|
// REFIID riid - Reference to another GUID?
|
|
// LPVOID * ppvObj - Pointer to pointer to interface.
|
|
//
|
|
// Returns: HRESULT
|
|
//=============================================================================
|
|
HRESULT DoCreateInstance(LPCLASSFACTORY This,
|
|
LPUNKNOWN pUnkOuter,
|
|
REFCLSID rclsid,
|
|
REFIID riid,
|
|
LPVOID * ppvObj)
|
|
{
|
|
HRESULT hr;
|
|
BOOL fNotCreatedWithCOM;
|
|
CNATHelpPAST * pNATHelpPAST = NULL;
|
|
|
|
|
|
DNASSERT(ppvObj != NULL);
|
|
|
|
|
|
if (! IsEqualCLSID(rclsid, CLSID_DirectPlayNATHelpPAST))
|
|
{
|
|
//
|
|
// This shouldn't happen if they called IClassFactory::CreateObject
|
|
// correctly.
|
|
//
|
|
DNASSERT(FALSE);
|
|
|
|
//
|
|
// Return an error.
|
|
//
|
|
hr = E_UNEXPECTED;
|
|
goto Failure;
|
|
}
|
|
|
|
|
|
//
|
|
// If the class factory pointer is NULL, then we were called by the
|
|
// DirectPlayNATHelpCreate function.
|
|
//
|
|
if (This == NULL)
|
|
{
|
|
fNotCreatedWithCOM = TRUE;
|
|
}
|
|
else
|
|
{
|
|
fNotCreatedWithCOM = FALSE;
|
|
}
|
|
|
|
|
|
//
|
|
// Create the object instance.
|
|
//
|
|
pNATHelpPAST = new CNATHelpPAST(fNotCreatedWithCOM);
|
|
if (pNATHelpPAST == NULL)
|
|
{
|
|
hr = E_OUTOFMEMORY;
|
|
goto Failure;
|
|
}
|
|
|
|
//
|
|
// Initialize the base object (which might fail).
|
|
//
|
|
hr = pNATHelpPAST->InitializeObject();
|
|
if (hr != S_OK)
|
|
{
|
|
DPFX(DPFPREP, 0, "Couldn't initialize object!");
|
|
delete pNATHelpPAST;
|
|
pNATHelpPAST = NULL;
|
|
goto Failure;
|
|
}
|
|
|
|
|
|
//
|
|
// Add it to the global list.
|
|
//
|
|
DNEnterCriticalSection(&g_csGlobalsLock);
|
|
|
|
pNATHelpPAST->m_blList.InsertBefore(&g_blNATHelpPASTObjs);
|
|
|
|
g_lOutstandingInterfaceCount++; // update count so DllCanUnloadNow works correctly
|
|
|
|
DNLeaveCriticalSection(&g_csGlobalsLock);
|
|
|
|
|
|
//
|
|
// Get the right interface for the caller and bump the refcount.
|
|
//
|
|
hr = pNATHelpPAST->QueryInterface(riid, ppvObj);
|
|
if (hr != S_OK)
|
|
{
|
|
goto Failure;
|
|
}
|
|
|
|
|
|
Exit:
|
|
|
|
//
|
|
// Release the local reference to the object. If this function was
|
|
// successful, there's still a reference in ppvObj.
|
|
//
|
|
if (pNATHelpPAST != NULL)
|
|
{
|
|
pNATHelpPAST->Release();
|
|
pNATHelpPAST = NULL;
|
|
}
|
|
|
|
return hr;
|
|
|
|
|
|
Failure:
|
|
|
|
//
|
|
// Make sure we don't hand back a pointer.
|
|
//
|
|
(*ppvObj) = NULL;
|
|
|
|
goto Exit;
|
|
} // DoCreateInstance
|
|
|
|
|
|
|
|
|
|
#undef DPF_MODNAME
|
|
#define DPF_MODNAME "IsClassImplemented"
|
|
//=============================================================================
|
|
// IsClassImplemented
|
|
//-----------------------------------------------------------------------------
|
|
//
|
|
// Description: Determine if a class is implemented in this DLL. Required by
|
|
// the general purpose class factory functions.
|
|
//
|
|
// Arguments:
|
|
// REFCLSID rclsid - Reference to class GUID.
|
|
//
|
|
// Returns: BOOL
|
|
// TRUE - This DLL implements the class.
|
|
// FALSE - This DLL doesn't implement the class.
|
|
//=============================================================================
|
|
BOOL IsClassImplemented(REFCLSID rclsid)
|
|
{
|
|
return (IsEqualCLSID(rclsid, CLSID_DirectPlayNATHelpPAST));
|
|
} // IsClassImplemented
|