reactos/base/services/svchost/netbios.c

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/*
* PROJECT: ReactOS Service Host
* LICENSE: BSD - See COPYING.ARM in the top level directory
* FILE: base/services/svchost/netbios.c
* PURPOSE: NetBIOS Service Support
* PROGRAMMERS: ReactOS Portable Systems Group
*/
/* INCLUDES ******************************************************************/
#include "svchost.h"
#include <lmerr.h>
#include <nb30.h>
/* GLOBALS *******************************************************************/
LONG GlobalNetBiosUseCount;
DWORD LanaFlags[8];
CRITICAL_SECTION SvcNetBiosCritSec;
/* FUNCTIONS *****************************************************************/
DWORD
WINAPI
SvcNetBiosStatusToApiStatus (
_In_ DWORD NetBiosError
)
{
/* Convert from one status to another */
switch (NetBiosError)
{
case NRC_GOODRET:
return NERR_Success;
case NRC_INUSE:
case NRC_NAMCONF:
return NERR_DuplicateName;
case NRC_NOWILD:
case NRC_NAMERR:
return ERROR_INVALID_PARAMETER;
case NRC_NOCALL:
return NERR_NameNotFound;
case NRC_NORES:
return NERR_NoNetworkResource;
case NRC_DUPNAME:
return NERR_AlreadyExists;
case NRC_NAMTFUL:
return NERR_TooManyNames;
case NRC_ACTSES:
return NERR_DeleteLater;
case NRC_REMTFUL:
return ERROR_REM_NOT_LIST;
default:
return NERR_NetworkError;
}
}
BOOL
WINAPI
LanaFlagIsSet (
_In_ UCHAR Lana
)
{
DWORD i = Lana / 32;
/* Clear the flag for this LANA */
return (i <= 7) ? LanaFlags[i] & (1 << (Lana - 32 * i)) : FALSE;
}
VOID
WINAPI
SetLanaFlag (
_In_ UCHAR Lana
)
{
DWORD i = Lana / 32;
/* Set the flag for this LANA */
if (i <= 7) LanaFlags[i] |= 1 << (Lana - 32 * i);
}
VOID
WINAPI
SvcNetBiosInit(
VOID
)
{
/* Initialize NetBIOS-related structures and variables */
InitializeCriticalSection(&SvcNetBiosCritSec);
GlobalNetBiosUseCount = 0;
ZeroMemory(LanaFlags, sizeof(LanaFlags));
}
VOID
WINAPI
SvcNetBiosClose (
VOID
)
{
/* While holding the lock, drop a reference*/
EnterCriticalSection(&SvcNetBiosCritSec);
if ((GlobalNetBiosUseCount != 0) && (--GlobalNetBiosUseCount == 0))
{
/* All references are gone, clear all LANA's */
ZeroMemory(LanaFlags, sizeof(LanaFlags));
}
LeaveCriticalSection(&SvcNetBiosCritSec);
}
VOID
WINAPI
SvcNetBiosOpen (
VOID
)
{
/* Increment the reference counter while holding the lock */
EnterCriticalSection(&SvcNetBiosCritSec);
GlobalNetBiosUseCount++;
LeaveCriticalSection(&SvcNetBiosCritSec);
}
DWORD
WINAPI
SvcNetBiosReset (
_In_ UCHAR LanaNum
)
{
DWORD dwError = ERROR_SUCCESS;
UCHAR nbtError;
NCB ncb;
/* Block all other NetBIOS operations */
EnterCriticalSection(&SvcNetBiosCritSec);
/* Is this LANA enabled? */
if (!LanaFlagIsSet(LanaNum))
{
/* Yep, build a reset packet */
ZeroMemory(&ncb, sizeof(ncb));
ncb.ncb_lsn = 0;
ncb.ncb_command = NCBRESET;
ncb.ncb_callname[0] = 0xFE; // Max Sessions
ncb.ncb_callname[1] = 0;
ncb.ncb_callname[2] = 0xFD; // Max Names
ncb.ncb_callname[3] = 0;
ncb.ncb_lana_num = LanaNum;
/* Send it */
nbtError = Netbios(&ncb);
/* Convert the status to Win32 format */
dwError = SvcNetBiosStatusToApiStatus(nbtError);
/* Enable the LANA if the reset worked */
if (dwError == ERROR_SUCCESS) SetLanaFlag(LanaNum);
}
/* Drop the lock and return */
LeaveCriticalSection(&SvcNetBiosCritSec);
return dwError;
}