Leaked source code of windows server 2003
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6.8 KiB

/*++
Copyright (c) 1990 Microsoft Corporation
Module Name:
beep.c
Abstract:
This module contains the Win32 Beep APIs
Author:
Steve Wood (stevewo) 5-Oct-1991
Revision History:
--*/
#include "basedll.h"
#pragma hdrstop
#include <ntddbeep.h>
#include "conapi.h"
#define IsActiveConsoleSession() (BOOLEAN)(USER_SHARED_DATA->ActiveConsoleId == NtCurrentPeb()->SessionId)
/*
* Forward declaration
*/
VOID NotifySoundSentry(VOID);
BOOL
APIENTRY
Beep(
DWORD dwFreq,
DWORD dwDuration
)
{
OBJECT_ATTRIBUTES ObjectAttributes;
UNICODE_STRING NameString;
NTSTATUS Status;
IO_STATUS_BLOCK IoStatus;
BEEP_SET_PARAMETERS BeepParameters;
HANDLE hBeepDevice, hTSBeepDevice;
if ( IsTerminalServer() ) {
if ( !pWinStationBeepOpen ) {
HMODULE hwinsta = NULL;
/*
* Get handle to winsta.dll
*/
if ( (hwinsta = LoadLibraryW( L"WINSTA" )) != NULL ) {
PWINSTATIONBEEPOPEN BeepOpenFunction;
BeepOpenFunction = (PWINSTATIONBEEPOPEN)
GetProcAddress( hwinsta, "_WinStationBeepOpen" );
if (BeepOpenFunction
&& ! InterlockedCompareExchangePointer((PVOID *)&pWinStationBeepOpen,
BeepOpenFunction,
NULL)) {
// We got a function, and we were the first to
// store our function to the global -- so pin the
// dll containing the function.
LdrAddRefDll(LDR_ADDREF_DLL_PIN, hwinsta);
} else {
// Either we didn't get a function, or we weren't
// the first to store our function to the global
// -- so we don't need our reference to the dll.
FreeLibrary(hwinsta);
}
}
}
hTSBeepDevice = NULL;
if ( pWinStationBeepOpen )
hTSBeepDevice = (*pWinStationBeepOpen)( -1 ); //Current Session
}
if ( IsTerminalServer() && !IsActiveConsoleSession() ) {
hBeepDevice = hTSBeepDevice;
if ( hBeepDevice == NULL )
Status = STATUS_ACCESS_DENIED;
else
Status = STATUS_SUCCESS;
}
else {
RtlInitUnicodeString( &NameString, DD_BEEP_DEVICE_NAME_U );
InitializeObjectAttributes( &ObjectAttributes,
&NameString,
0,
NULL,
NULL
);
Status = NtCreateFile( &hBeepDevice,
FILE_READ_DATA | FILE_WRITE_DATA,
&ObjectAttributes,
&IoStatus,
NULL,
0,
FILE_SHARE_READ | FILE_SHARE_WRITE,
FILE_OPEN_IF,
0,
NULL,
0L
);
}
if (!NT_SUCCESS( Status )) {
if ( IsTerminalServer() && hTSBeepDevice ) {
NtClose( hTSBeepDevice );
}
BaseSetLastNTError( Status );
return( FALSE );
}
//
// 0,0 is a special case used to turn off a beep. Otherwise
// validate the dwFreq parameter to be in range.
//
if ((dwFreq != 0 || dwDuration != 0) &&
(dwFreq < (ULONG)0x25 || dwFreq > (ULONG)0x7FFF)
) {
Status = STATUS_INVALID_PARAMETER;
}
else {
BeepParameters.Frequency = dwFreq;
BeepParameters.Duration = dwDuration;
Status = NtDeviceIoControlFile( hBeepDevice,
NULL,
NULL,
NULL,
&IoStatus,
IOCTL_BEEP_SET,
&BeepParameters,
sizeof( BeepParameters ),
NULL,
0
);
}
if ( IsTerminalServer() && IsActiveConsoleSession() && hTSBeepDevice ) {
//
// It's the console and since we got a beep device, it's being shadowed.
// So let's do it one more time for the shadow client.
//
if ( NT_SUCCESS(Status) ) {
NtDeviceIoControlFile( hTSBeepDevice,
NULL,
NULL,
NULL,
&IoStatus,
IOCTL_BEEP_SET,
&BeepParameters,
sizeof( BeepParameters ),
NULL,
0
);
}
NtClose( hTSBeepDevice );
}
NotifySoundSentry();
if (!NT_SUCCESS( Status )) {
BaseSetLastNTError( Status );
NtClose( hBeepDevice );
return( FALSE );
}
else {
//
// Beep device is asynchronous, so sleep for duration
// to allow this beep to complete.
//
if (dwDuration != (DWORD)-1 && (dwFreq != 0 || dwDuration != 0)) {
SleepEx( dwDuration, TRUE );
}
NtClose( hBeepDevice );
return( TRUE );
}
}
VOID
NotifySoundSentry(VOID)
{
#if defined(BUILD_WOW6432)
ULONG VideoMode;
if (!GetConsoleDisplayMode(&VideoMode)) {
VideoMode = 0;
}
//
// SoundSentry is currently only supported for Windows mode - no
// full screen support.
//
if (VideoMode == 0) {
CsrBasepSoundSentryNotification(VideoMode);
}
#else
BASE_API_MSG m;
PBASE_SOUNDSENTRY_NOTIFICATION_MSG e = &m.u.SoundSentryNotification;
if (!GetConsoleDisplayMode(&e->VideoMode)) {
e->VideoMode = 0;
}
//
// SoundSentry is currently only supported for Windows mode - no
// full screen support.
//
if (e->VideoMode == 0) {
CsrClientCallServer((PCSR_API_MSG)&m,
NULL,
CSR_MAKE_API_NUMBER( BASESRV_SERVERDLL_INDEX,
BasepSoundSentryNotification ),
sizeof( *e )
);
}
#endif
}