/**********************************************************************/
/** Microsoft Windows/NT **/
/** Copyright(c) Microsoft Corp., 1993 **/
/**********************************************************************/
/*
Nbtinfo.c
This file contains the NBT Info APIs
FILE HISTORY:
Johnl 13-Dec-1993 Created
*/
#include <nbtprocs.h>
#include <dhcpinfo.h>
#include <nbtinfo.h>
/*******************************************************************
NAME: AddrChngNotification
SYNOPSIS: Notification handler called by Dhcp when an IpAddress
lease has expired or changed.
ENTRY: Context - Pointer to device context
OldIpAddress - in network order
NewIpAddress - in network order
NewMask - in network order
NOTES:
HISTORY:
Johnl 21-Dec-1993 Created
********************************************************************/
VOID AddrChngNotification( PVOID Context,
ULONG OldIpAddress,
ULONG NewIpAddress,
ULONG NewMask )
{
tDEVICECONTEXT * pDeviceContext = (tDEVICECONTEXT*) Context ;
TDI_STATUS tdistatus ;
NTSTATUS status ;
ULONG IpBuff[4] ;
UINT Size ;
ULONG TmpNodeType;
DbgPrint("DhcpNotification: Nbt being notified of IP Address change by DHCP\r\n") ;
//
// NBT assumes the address goes to zero then comes up on the new
// address, so if the address is going to a new address (not to
// zero first) then fake it.
//
if ( NewIpAddress && pDeviceContext->IpAddress )
{
if ( status = NbtNewDhcpAddress( pDeviceContext, 0, 0 ) )
{
CDbgPrint( DBGFLAG_ERROR, ("DhcpNotification: NbtSetNewDhcpAddress failed")) ;
}
}
if ( NewIpAddress == 0 )
{
if ( status = NbtNewDhcpAddress( pDeviceContext, 0, 0 ) )
{
CDbgPrint( DBGFLAG_ERROR, ("DhcpNotification: NbtSetNewDhcpAddress failed")) ;
}
pDeviceContext->IpAddress = 0 ;
return ;
}
//
// Get all of the values that may change when the IP address changes.
// Currently this is only NBNS (scope & broadcast address are global
// NBT config parameters).
//
Size = sizeof( IpBuff ) ;
tdistatus = DhcpQueryOption( NewIpAddress,
44, // NBNS
IpBuff,
&Size ) ;
if ( tdistatus != TDI_SUCCESS &&
tdistatus != TDI_BUFFER_OVERFLOW )
{
CDbgPrint( DBGFLAG_ERROR, ("DhcpNotification: Query on NBNS failed")) ;
}
else
{
if ( Size >= 4 )
pDeviceContext->lNameServerAddress = ntohl(IpBuff[0]) ;
if ( Size >= 8 )
pDeviceContext->lBackupServer = ntohl(IpBuff[1]) ;
}
//
// if the node type is set to Bnode by default then switch to Hnode if
// there are any WINS servers configured.
//
TmpNodeType = NodeType;
if ((NodeType & DEFAULT_NODE_TYPE) &&
(pDeviceContext->lNameServerAddress || pDeviceContext->lBackupServer))
{
NodeType = MSNODE;
if (TmpNodeType & PROXY)
NodeType |= PROXY;
}
//
// Now set the new IP address
//
status = NbtNewDhcpAddress( pDeviceContext,
NewIpAddress,
NewMask ) ;
if ( NT_SUCCESS(status) )
{
if (pDeviceContext->IpAddress)
{
//
// Add the "permanent" name to the local name table.
//
status = NbtAddPermanentName(pDeviceContext);
if (!(NodeType & BNODE))
{
// the Ip address just changed and Dhcp may be informing
// us of a new Wins Server addresses, so refresh all the
// names to the new wins server
//
ReRegisterLocalNames();
}
else
{
//
// no need to refresh on a Bnode
//
LockedStopTimer(&NbtConfig.pRefreshTimer);
}
}
}
else
{
CDbgPrint( DBGFLAG_ERROR, ("DhcpNotification: NbtSetNewDhcpAddress failed")) ;
}
}
/*******************************************************************
NAME: CloseAddressesWithTransport
SYNOPSIS: Closes address objects on the passed in device
ENTRY: pDeviceContext - Device context to close
NOTES: Used after an IP address loses its DHCP lease by OS
independent code.
HISTORY:
Johnl 13-Dec-1993 Created
********************************************************************/
NTSTATUS
CloseAddressesWithTransport(
IN tDEVICECONTEXT *pDeviceContext )
{
TDI_REQUEST Request ;
NTSTATUS status;
if (pDeviceContext->pDgramFileObject)
{
Request.Handle.AddressHandle = pDeviceContext->pDgramFileObject ;
if ( TdiVxdCloseAddress( &Request ))
CDbgPrint( DBGFLAG_ERROR, ("NbtSetInfo: Warning - CloseAddress Failed\r\n")) ;
pDeviceContext->pDgramFileObject = NULL;
}
if (pDeviceContext->pNameServerFileObject)
{
Request.Handle.AddressHandle = pDeviceContext->pNameServerFileObject ;
if ( TdiVxdCloseAddress( &Request ))
CDbgPrint( DBGFLAG_ERROR, ("NbtSetInfo: Warning - CloseAddress Failed\r\n")) ;
pDeviceContext->pNameServerFileObject = NULL;
}
if (pDeviceContext->pSessionFileObject)
{
Request.Handle.AddressHandle = pDeviceContext->pSessionFileObject ;
if ( TdiVxdCloseAddress( &Request ))
CDbgPrint( DBGFLAG_ERROR, ("NbtSetInfo: Warning - CloseAddress Failed\r\n")) ;
pDeviceContext->pSessionFileObject = NULL;
}
if (pDeviceContext->hBroadcastAddress)
{
Request.Handle.ConnectionContext = pDeviceContext->hBroadcastAddress ;
status = NbtCloseAddress( &Request, NULL, pDeviceContext, NULL );
if ( !NT_SUCCESS(status) )
{
CDbgPrint( DBGFLAG_ERROR, ("NbtSetInfo: Warning - Close Broadcast Address Failed\r\n")) ;
ASSERT(0);
}
}
return STATUS_SUCCESS ;
}
