361 lines
10 KiB
C
361 lines
10 KiB
C
|
/*++
|
||
|
|
|
||
|
|
Copyright (c) 1995 Microsoft Corporation
|
||
|
|
|
||
|
|
Module Name:
|
||
|
|
|
||
|
|
ntos\tdi\isn\fwd\netbios.c
|
||
|
|
|
||
|
|
Abstract:
|
||
|
|
Netbios packet processing
|
||
|
|
|
||
|
|
Author:
|
||
|
|
|
||
|
|
Vadim Eydelman
|
||
|
|
|
||
|
|
Revision History:
|
||
|
|
|
||
|
|
--*/
|
||
|
|
#include "precomp.h"
|
||
|
|
|
||
|
|
LIST_ENTRY NetbiosQueue;
|
||
|
|
KSPIN_LOCK NetbiosQueueLock;
|
||
|
|
WORK_QUEUE_ITEM NetbiosWorker;
|
||
|
|
BOOLEAN NetbiosWorkerScheduled=FALSE;
|
||
|
|
ULONG NetbiosPacketsQuota;
|
||
|
|
ULONG MaxNetbiosPacketsQueued = DEF_MAX_NETBIOS_PACKETS_QUEUED;
|
||
|
|
|
||
|
|
|
||
|
|
/*++
|
||
|
|
*******************************************************************
|
||
|
|
P r o c e s s N e t b i o s Q u e u e
|
||
|
|
|
||
|
|
Routine Description:
|
||
|
|
Process packets in the netbios broadcast queue (sends them on
|
||
|
|
all interfaces in sequence)
|
||
|
|
Arguments:
|
||
|
|
Context - unused
|
||
|
|
Return Value:
|
||
|
|
None
|
||
|
|
|
||
|
|
*******************************************************************
|
||
|
|
--*/
|
||
|
|
VOID
|
||
|
|
ProcessNetbiosQueue (
|
||
|
|
PVOID Context
|
||
|
|
) {
|
||
|
|
KIRQL oldIRQL;
|
||
|
|
LIST_ENTRY tempQueue;
|
||
|
|
|
||
|
|
KeAcquireSpinLock (&NetbiosQueueLock, &oldIRQL);
|
||
|
|
// Check if there is something in the queue
|
||
|
|
if (!IsListEmpty (&NetbiosQueue)) {
|
||
|
|
// Move the queue to local variable
|
||
|
|
InsertHeadList (&NetbiosQueue, &tempQueue);
|
||
|
|
RemoveEntryList (&NetbiosQueue);
|
||
|
|
InitializeListHead (&NetbiosQueue);
|
||
|
|
|
||
|
|
KeReleaseSpinLock (&NetbiosQueueLock, oldIRQL);
|
||
|
|
do {
|
||
|
|
PLIST_ENTRY cur;
|
||
|
|
PPACKET_TAG pktTag;
|
||
|
|
|
||
|
|
cur = RemoveHeadList (&tempQueue);
|
||
|
|
pktTag = CONTAINING_RECORD (cur, PACKET_TAG, PT_QueueLink);
|
||
|
|
// Check if this packet has to be sent on other
|
||
|
|
// interfaces
|
||
|
|
if (!(pktTag->PT_Flags&PT_NB_DESTROY)) {
|
||
|
|
PINTERFACE_CB dstIf = pktTag->PT_InterfaceReference;
|
||
|
|
PUCHAR dataPtr = pktTag->PT_Data;
|
||
|
|
UINT rtCount = *(dataPtr+IPXH_XPORTCTL);
|
||
|
|
PUCHAR netListPtr;
|
||
|
|
UINT i;
|
||
|
|
|
||
|
|
if (dstIf==NULL) {
|
||
|
|
// This is a brand new packet: not sent on any
|
||
|
|
// interface yet
|
||
|
|
USHORT dstSock = GETUSHORT (dataPtr+IPXH_DESTSOCK);
|
||
|
|
// Check if we have a static route for this name
|
||
|
|
// (offset to name depends on packet dest socket)
|
||
|
|
if (dstSock==IPX_NETBIOS_SOCKET)
|
||
|
|
dstIf = FindNBDestination (dataPtr+NB_NAME);
|
||
|
|
else if (dstSock==IPX_SMB_NAME_SOCKET)
|
||
|
|
dstIf = FindNBDestination (dataPtr+SMB_NAME);
|
||
|
|
else
|
||
|
|
dstIf = NULL;
|
||
|
|
|
||
|
|
if (dstIf!=NULL) {
|
||
|
|
// Static route found, make sure this packet
|
||
|
|
// won't be sent on any other interface
|
||
|
|
pktTag->PT_Flags |= PT_NB_DESTROY;
|
||
|
|
InterlockedIncrement (&NetbiosPacketsQuota);
|
||
|
|
// Make sure the packet has not traversed
|
||
|
|
// this network already
|
||
|
|
for (i=0, netListPtr=dataPtr+IPXH_HDRSIZE; i<rtCount; i++,netListPtr+=4) {
|
||
|
|
if (GETULONG (netListPtr)==dstIf->ICB_Network)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
// Make sure we are allowed to send on this
|
||
|
|
// interface
|
||
|
|
if ((dstIf!=InternalInterface)
|
||
|
|
&& (i==rtCount) // Has not already traversed
|
||
|
|
// this network
|
||
|
|
&& IS_IF_ENABLED (dstIf)
|
||
|
|
&& ((dstIf->ICB_NetbiosDeliver==FWD_NB_DELIVER_ALL)
|
||
|
|
|| (dstIf->ICB_NetbiosDeliver
|
||
|
|
==FWD_NB_DELIVER_STATIC)
|
||
|
|
|| ((dstIf->ICB_NetbiosDeliver
|
||
|
|
==FWD_NB_DELIVER_IF_UP)
|
||
|
|
&& (dstIf->ICB_Stats.OperationalState
|
||
|
|
==FWD_OPER_STATE_UP)))) {
|
||
|
|
NOTHING;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
// We have static route, but can't send it,
|
||
|
|
// no point to propagate in on other interfaces
|
||
|
|
// as well
|
||
|
|
ReleaseInterfaceReference (dstIf);
|
||
|
|
dstIf = NULL;
|
||
|
|
goto FreePacket;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else { // no static route
|
||
|
|
goto FindNextInterface;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else { // not a brand new packet (already sent on some
|
||
|
|
// interfaces)
|
||
|
|
|
||
|
|
FindNextInterface:
|
||
|
|
|
||
|
|
// Loop through the interface list till we find
|
||
|
|
// the one on which we can send
|
||
|
|
while ((dstIf=GetNextInterfaceReference (dstIf))!=NULL) {
|
||
|
|
// Check if we allowed to send on this interface
|
||
|
|
if (IS_IF_ENABLED (dstIf)
|
||
|
|
&& ((dstIf->ICB_NetbiosDeliver==FWD_NB_DELIVER_ALL)
|
||
|
|
|| ((dstIf->ICB_NetbiosDeliver
|
||
|
|
==FWD_NB_DELIVER_IF_UP)
|
||
|
|
&& (dstIf->ICB_Stats.OperationalState
|
||
|
|
==FWD_OPER_STATE_UP)))) {
|
||
|
|
// Make sure the packet has not traversed
|
||
|
|
// this network already
|
||
|
|
for (i=0, netListPtr=dataPtr+IPXH_HDRSIZE; i<rtCount; i++,netListPtr+=4) {
|
||
|
|
if (GETULONG (netListPtr)==dstIf->ICB_Network)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
// Network was not in the list
|
||
|
|
if (i==rtCount)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// Save the destination interface in the packet
|
||
|
|
pktTag->PT_InterfaceReference = dstIf;
|
||
|
|
// Go ahead and send if we have a valid destination
|
||
|
|
if (dstIf!=NULL) {
|
||
|
|
SendPacket (dstIf, pktTag);
|
||
|
|
// The rest does not apply: if the packet was sent or
|
||
|
|
// failed, it will be queued back to NetbiosQueue;
|
||
|
|
// if it was queued to interface to be connected,
|
||
|
|
// a copy of it will be queued to NetbiosQueue
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
// else no more destinations to send this packet on
|
||
|
|
}
|
||
|
|
else { // Packet has to be destroyed
|
||
|
|
if (pktTag->PT_InterfaceReference!=NULL)
|
||
|
|
ReleaseInterfaceReference (pktTag->PT_InterfaceReference);
|
||
|
|
}
|
||
|
|
|
||
|
|
FreePacket:
|
||
|
|
IpxFwdDbgPrint (DBG_NETBIOS, DBG_INFORMATION,
|
||
|
|
("IpxFwd: No more interfaces for nb packet %08lx.\n",
|
||
|
|
pktTag));
|
||
|
|
if (MeasuringPerformance
|
||
|
|
&& (pktTag->PT_PerfCounter!=0)) {
|
||
|
|
LARGE_INTEGER PerfCounter = KeQueryPerformanceCounter (NULL);
|
||
|
|
PerfCounter.QuadPart -= pktTag->PT_PerfCounter;
|
||
|
|
KeAcquireSpinLock (&PerfCounterLock, &oldIRQL);
|
||
|
|
PerfBlock.TotalNbPacketProcessingTime += PerfCounter.QuadPart;
|
||
|
|
PerfBlock.NbPacketCounter += 1;
|
||
|
|
if (PerfBlock.MaxNbPacketProcessingTime < PerfCounter.QuadPart)
|
||
|
|
PerfBlock.MaxNbPacketProcessingTime = PerfCounter.QuadPart;
|
||
|
|
KeReleaseSpinLock (&PerfCounterLock, oldIRQL);
|
||
|
|
}
|
||
|
|
if (!(pktTag->PT_Flags&PT_NB_DESTROY))
|
||
|
|
InterlockedIncrement (&NetbiosPacketsQuota);
|
||
|
|
FreePacket (pktTag);
|
||
|
|
} while (!IsListEmpty (&tempQueue));
|
||
|
|
|
||
|
|
KeAcquireSpinLock (&NetbiosQueueLock, &oldIRQL);
|
||
|
|
if (IsListEmpty (&NetbiosQueue)
|
||
|
|
|| !EnterForwarder ()) {
|
||
|
|
NetbiosWorkerScheduled = FALSE;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
ExQueueWorkItem (&NetbiosWorker, DelayedWorkQueue);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
KeReleaseSpinLock (&NetbiosQueueLock, oldIRQL);
|
||
|
|
LeaveForwarder ();
|
||
|
|
}
|
||
|
|
|
||
|
|
/*++
|
||
|
|
*******************************************************************
|
||
|
|
P r o c e s s N e t b i o s P a c k e t
|
||
|
|
|
||
|
|
Routine Description:
|
||
|
|
Processes received netbios broadcast packet (checks network list
|
||
|
|
and source filter, updates input statistics)
|
||
|
|
Arguments:
|
||
|
|
srcIf - interfae on which packet was received
|
||
|
|
pktTag - netbios packet
|
||
|
|
Return Value:
|
||
|
|
None
|
||
|
|
|
||
|
|
*******************************************************************
|
||
|
|
--*/
|
||
|
|
VOID
|
||
|
|
ProcessNetbiosPacket (
|
||
|
|
PINTERFACE_CB srcIf,
|
||
|
|
PPACKET_TAG pktTag
|
||
|
|
) {
|
||
|
|
PUCHAR dataPtr, dataPtr2;
|
||
|
|
UINT rtCount;
|
||
|
|
UINT i, j;
|
||
|
|
KIRQL oldIRQL;
|
||
|
|
ULONG ulNetwork;
|
||
|
|
|
||
|
|
|
||
|
|
dataPtr = pktTag->PT_Data;
|
||
|
|
rtCount = *(dataPtr+IPXH_XPORTCTL);
|
||
|
|
|
||
|
|
//
|
||
|
|
// pmay: 264339: Make sure valid networks are listed
|
||
|
|
//
|
||
|
|
// We used to only verify that the source network was not
|
||
|
|
// contained in the list. Now, we verify that 0 and 0xfffffff
|
||
|
|
// are also absent.
|
||
|
|
//
|
||
|
|
for (i = 0, dataPtr += IPXH_HDRSIZE; i < rtCount; i++, dataPtr += 4)
|
||
|
|
{
|
||
|
|
ulNetwork = GETULONG (dataPtr);
|
||
|
|
|
||
|
|
if ((srcIf->ICB_Network == ulNetwork) ||
|
||
|
|
(ulNetwork == 0xffffffff) ||
|
||
|
|
(ulNetwork == 0x0))
|
||
|
|
{
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// pmay: 272193
|
||
|
|
//
|
||
|
|
// nwlnknb on nt4 puts status bits into the first router slot in
|
||
|
|
// the type 20 payload. As a consequence, the router has to
|
||
|
|
// ignore the first slot when validating the router table so that nt4
|
||
|
|
// client bcasts aren't dropped at the router.
|
||
|
|
//
|
||
|
|
if (rtCount == 0)
|
||
|
|
{
|
||
|
|
j = 1;
|
||
|
|
dataPtr2 = dataPtr + 4;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
j = i;
|
||
|
|
dataPtr2 = dataPtr;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// pmay: 264331
|
||
|
|
//
|
||
|
|
// Make sure the rest of the networks listed are zero
|
||
|
|
//
|
||
|
|
for (; j < 8; j++, dataPtr2 += 4)
|
||
|
|
{
|
||
|
|
ulNetwork = GETULONG (dataPtr2);
|
||
|
|
|
||
|
|
if (ulNetwork != 0x0)
|
||
|
|
{
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// We scaned the whole list and we haven't found it
|
||
|
|
if ((i == rtCount) && (j == 8)) {
|
||
|
|
FILTER_ACTION action;
|
||
|
|
action = FltFilter (pktTag->PT_Data,
|
||
|
|
GETUSHORT (pktTag->PT_Data+IPXH_LENGTH),
|
||
|
|
srcIf->ICB_FilterInContext, NULL);
|
||
|
|
// Apply the input filter
|
||
|
|
if (action==FILTER_PERMIT) {
|
||
|
|
InterlockedIncrement (&srcIf->ICB_Stats.NetbiosReceived);
|
||
|
|
InterlockedIncrement (&srcIf->ICB_Stats.InDelivers);
|
||
|
|
PUTULONG (srcIf->ICB_Network, dataPtr);
|
||
|
|
*(pktTag->PT_Data+IPXH_XPORTCTL) += 1;
|
||
|
|
IPX_NODE_CPY (pktTag->PT_Target.MacAddress, BROADCAST_NODE);
|
||
|
|
// Initialize the packet
|
||
|
|
pktTag->PT_InterfaceReference = NULL; // not yet sent on any
|
||
|
|
// interfaces
|
||
|
|
pktTag->PT_Flags = 0; // No flags
|
||
|
|
QueueNetbiosPacket (pktTag);
|
||
|
|
IpxFwdDbgPrint (DBG_NETBIOS, DBG_INFORMATION,
|
||
|
|
("IpxFwd: Queued nb packet %08lx from if %ld.\n",
|
||
|
|
pktTag, srcIf->ICB_Index));
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
ASSERT (action==FILTER_DENY_IN);
|
||
|
|
IpxFwdDbgPrint (DBG_NETBIOS, DBG_WARNING,
|
||
|
|
("IpxFwd: Filtered out nb packet %08lx"
|
||
|
|
" from if %ld.\n", pktTag, srcIf->ICB_Index));
|
||
|
|
InterlockedIncrement (&NetbiosPacketsQuota);
|
||
|
|
InterlockedIncrement (&srcIf->ICB_Stats.InFiltered);
|
||
|
|
FreePacket (pktTag);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
IpxFwdDbgPrint (DBG_NETBIOS, DBG_WARNING,
|
||
|
|
("IpxFwd: Source net is already in nb packet %08lx"
|
||
|
|
" from if %ld.\n", pktTag, srcIf->ICB_Index));
|
||
|
|
InterlockedIncrement (&NetbiosPacketsQuota);
|
||
|
|
InterlockedIncrement (&srcIf->ICB_Stats.InDiscards);
|
||
|
|
FreePacket (pktTag);
|
||
|
|
}
|
||
|
|
ReleaseInterfaceReference (srcIf);
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*++
|
||
|
|
*******************************************************************
|
||
|
|
D e l e t e N e t b i o s Q u e u e
|
||
|
|
|
||
|
|
Routine Description:
|
||
|
|
Deletes the netbios bradcast queue
|
||
|
|
Arguments:
|
||
|
|
None
|
||
|
|
Return Value:
|
||
|
|
None
|
||
|
|
|
||
|
|
*******************************************************************
|
||
|
|
--*/
|
||
|
|
VOID
|
||
|
|
DeleteNetbiosQueue (
|
||
|
|
void
|
||
|
|
) {
|
||
|
|
while (!IsListEmpty (&NetbiosQueue)) {
|
||
|
|
PPACKET_TAG pktTag = CONTAINING_RECORD (NetbiosQueue.Flink,
|
||
|
|
PACKET_TAG,
|
||
|
|
PT_QueueLink);
|
||
|
|
RemoveEntryList (&pktTag->PT_QueueLink);
|
||
|
|
if (pktTag->PT_InterfaceReference!=NULL) {
|
||
|
|
ReleaseInterfaceReference (pktTag->PT_InterfaceReference);
|
||
|
|
}
|
||
|
|
FreePacket (pktTag);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|