96 lines
1.7 KiB
C++
96 lines
1.7 KiB
C++
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/*++
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Copyright (c) 2001 Microsoft Corporation
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Module Name:
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IgnoreTAPIDisconnect.cpp
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Abstract:
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NT4 does not send a disconnect message to the line callback. It's not clear
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why this is the case.
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The current behaviour seems to be correct, so this shim simply removes the
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disconnect message from the queue.
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Notes:
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This is a general purpose shim.
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History:
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05/09/2001 linstev Created
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--*/
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#include "precomp.h"
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IMPLEMENT_SHIM_BEGIN(IgnoreTAPIDisconnect)
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#include "ShimHookMacro.h"
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APIHOOK_ENUM_BEGIN
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APIHOOK_ENUM_ENTRY(lineInitialize)
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APIHOOK_ENUM_END
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/*++
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Ignore disconnect state.
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--*/
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VOID FAR PASCAL LineCallback(
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LINECALLBACK pfnOld,
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DWORD hDevice,
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DWORD dwMsg,
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DWORD dwCallbackInstance,
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DWORD dwParam1,
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DWORD dwParam2,
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DWORD dwParam3
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)
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{
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if ((dwMsg == LINEAGENTSTATUS_STATE) && (dwParam1 & LINECALLSTATE_DISCONNECTED)) {
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//
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// Ignore disconnect message
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//
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return;
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}
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return (*pfnOld)(hDevice, dwMsg, dwCallbackInstance, dwParam1, dwParam2, dwParam3);
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}
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/*++
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Hook the callback.
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--*/
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LONG
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APIHOOK(lineInitialize)(
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LPHLINEAPP lphLineApp,
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HINSTANCE hInstance,
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LINECALLBACK lpfnCallback,
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LPCSTR lpszAppName,
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LPDWORD lpdwNumDevs
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)
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{
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return ORIGINAL_API(lineInitialize)(lphLineApp, hInstance,
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(LINECALLBACK) HookCallback(lpfnCallback, LineCallback), lpszAppName,
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lpdwNumDevs);
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}
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/*++
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Register hooked functions
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--*/
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HOOK_BEGIN
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APIHOOK_ENTRY(TAPI32.DLL, lineInitialize)
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HOOK_END
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IMPLEMENT_SHIM_END
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