netbios.c File Reference

#include "svchost.h"
#include <lmerr.h>
#include <nb30.h>

Include dependency graph for netbios.c:

Go to the source code of this file.

Functions
DWORD WINAPI	SvcNetBiosStatusToApiStatus (_In_ DWORD NetBiosError)
BOOL WINAPI	LanaFlagIsSet (_In_ UCHAR Lana)
VOID WINAPI	SetLanaFlag (_In_ UCHAR Lana)
VOID WINAPI	SvcNetBiosInit (VOID)
VOID WINAPI	SvcNetBiosClose (VOID)
VOID WINAPI	SvcNetBiosOpen (VOID)
DWORD WINAPI	SvcNetBiosReset (_In_ UCHAR LanaNum)

Variables
LONG	GlobalNetBiosUseCount
DWORD	LanaFlags [8]
CRITICAL_SECTION	SvcNetBiosCritSec

Function Documentation

LanaFlagIsSet()

BOOL WINAPI LanaFlagIsSet

(

_In_ UCHAR

Lana

)

Definition at line 60 of file netbios.c.

{
    DWORD i = Lana / 32;
 
    /* Clear the flag for this LANA */
    return (i <= 7) ? LanaFlags[i] & (1 << (Lana - 32 * i)) : FALSE;
}

Referenced by SvcNetBiosReset().

SetLanaFlag()

VOID WINAPI SetLanaFlag

(

_In_ UCHAR

Lana

)

Definition at line 72 of file netbios.c.

{
    DWORD i = Lana / 32;
 
    /* Set the flag for this LANA */
    if (i <= 7) LanaFlags[i] |= 1 << (Lana - 32 * i);
}

Referenced by SvcNetBiosReset().

SvcNetBiosClose()

VOID WINAPI SvcNetBiosClose

(

VOID

)

Definition at line 96 of file netbios.c.

{
    /* 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);
}

Referenced by SvchostBuildSharedGlobals().

SvcNetBiosInit()

VOID WINAPI SvcNetBiosInit

(

VOID

)

Definition at line 84 of file netbios.c.

{
    /* Initialize NetBIOS-related structures and variables */
    InitializeCriticalSection(&SvcNetBiosCritSec);
    GlobalNetBiosUseCount = 0;
    ZeroMemory(LanaFlags, sizeof(LanaFlags));
}

Referenced by SvchostBuildSharedGlobals().

SvcNetBiosOpen()

VOID WINAPI SvcNetBiosOpen

(

VOID

)

Definition at line 112 of file netbios.c.

{
    /* Increment the reference counter while holding the lock */
    EnterCriticalSection(&SvcNetBiosCritSec);
    GlobalNetBiosUseCount++;
    LeaveCriticalSection(&SvcNetBiosCritSec);
}

Referenced by SvchostBuildSharedGlobals().

SvcNetBiosReset()

DWORD WINAPI SvcNetBiosReset

(

_In_ UCHAR

LanaNum

)

Definition at line 124 of file netbios.c.

{
    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;
}

Referenced by SvchostBuildSharedGlobals().

SvcNetBiosStatusToApiStatus()

DWORD WINAPI SvcNetBiosStatusToApiStatus

(

_In_ DWORD

NetBiosError

)

Definition at line 26 of file netbios.c.

{
    /* 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;
    }
}

Referenced by SvcNetBiosReset().

Variable Documentation

GlobalNetBiosUseCount

LONG GlobalNetBiosUseCount

Definition at line 18 of file netbios.c.

Referenced by SvcNetBiosClose(), SvcNetBiosInit(), and SvcNetBiosOpen().

LanaFlags

DWORD LanaFlags[8]

Definition at line 19 of file netbios.c.

Referenced by LanaFlagIsSet(), SetLanaFlag(), SvcNetBiosClose(), and SvcNetBiosInit().

SvcNetBiosCritSec

CRITICAL_SECTION SvcNetBiosCritSec

Definition at line 20 of file netbios.c.

Referenced by SvcNetBiosClose(), SvcNetBiosInit(), SvcNetBiosOpen(), and SvcNetBiosReset().