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3994 lines
130 KiB
3994 lines
130 KiB
/*++
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Copyright(c) 1999-2000 Microsoft Corporation
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Module Name:
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brdgfwd.c
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Abstract:
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Ethernet MAC level bridge.
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Forwarding engine section
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Author:
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Mark Aiken
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(original bridge by Jameel Hyder)
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Environment:
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Kernel mode driver
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Revision History:
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Feb 2000 - Original version
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--*/
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#define NDIS_MINIPORT_DRIVER
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#define NDIS50_MINIPORT 1
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#define NDIS_WDM 1
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#pragma warning( push, 3 )
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#include <ndis.h>
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#include <ntddk.h>
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#pragma warning( pop )
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#include <netevent.h>
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#include "bridge.h"
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#include "brdgprot.h"
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#include "brdgmini.h"
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#include "brdgtbl.h"
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#include "brdgfwd.h"
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#include "brdgbuf.h"
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#include "brdgctl.h"
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#include "brdgsta.h"
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#include "brdgcomp.h"
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// ===========================================================================
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//
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// CONSTANTS
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//
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// ===========================================================================
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//
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// Number of queued packets we will process back-to-back at DISPATCH level before
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// dropping back to PASSIVE to let the scheduler run
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//
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#define MAX_PACKETS_AT_DPC 10
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// The STA multicast address
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UCHAR STA_MAC_ADDR[ETH_LENGTH_OF_ADDRESS] = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x00 };
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// The flags we change on packet descriptor when sending them. For a fast-track
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// send, these flags should be put back the way they were before returning
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// the overlying protocol's packet descriptor.
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#define CHANGED_PACKET_FLAGS (NDIS_FLAGS_LOOPBACK_ONLY | NDIS_FLAGS_DONT_LOOPBACK)
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// ===========================================================================
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//
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// GLOBALS
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//
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// ===========================================================================
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//
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// Pointers to the KTHREAD structure for each active thread
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//
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PVOID gThreadPtrs[MAXIMUM_PROCESSORS];
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//
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// The number of created threads
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//
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UINT gNumThreads = 0L;
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// Global kill signal for threads
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KEVENT gKillThreads;
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//
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// These auto-reset events signal the queue-draining threads to re-enumerate the
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// adapter list (strobed when the adapter list is changed)
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//
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KEVENT gThreadsCheckAdapters[MAXIMUM_PROCESSORS];
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//
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// DEBUG-ONLY: Set this to a particular MAC address to break when receiving a packet
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// from that address.
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//
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#if DBG
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BOOLEAN gBreakOnMACAddress = FALSE;
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UCHAR gBreakMACAddress[ETH_LENGTH_OF_ADDRESS] = {0, 0, 0, 0, 0, 0};
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BOOLEAN gBreakIfNullPPI = FALSE;
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#endif
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//
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// XPSP1: 565471
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// We start out with this disabled. Once we know that it's allowed, we re-allow bridging to
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// take place.
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//
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BOOLEAN gBridging = FALSE;
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BOOLEAN gPrintPacketTypes = FALSE;
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extern BOOLEAN gHaveID;
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// ===========================================================================
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//
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// STATISTICS
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//
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// ===========================================================================
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LARGE_INTEGER gStatTransmittedFrames = { 0L, 0L }; // Local-source frames sent successfully to at least
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// one adapter
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LARGE_INTEGER gStatTransmittedErrorFrames = { 0L, 0L }; // Local-source frames not sent AT ALL due to errors
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LARGE_INTEGER gStatTransmittedBytes = { 0L, 0L }; // Local-source bytes sent successfully to at least
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// one adapter
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// Breakdown of transmitted frames
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LARGE_INTEGER gStatDirectedTransmittedFrames = { 0L, 0L };
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LARGE_INTEGER gStatMulticastTransmittedFrames = { 0L, 0L };
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LARGE_INTEGER gStatBroadcastTransmittedFrames = { 0L, 0L };
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// Breakdown of transmitted bytes
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LARGE_INTEGER gStatDirectedTransmittedBytes = { 0L, 0L };
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LARGE_INTEGER gStatMulticastTransmittedBytes = { 0L, 0L };
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LARGE_INTEGER gStatBroadcastTransmittedBytes = { 0L, 0L };
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LARGE_INTEGER gStatIndicatedFrames = { 0L, 0L }; // # of inbound frames indicated up
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LARGE_INTEGER gStatIndicatedDroppedFrames = { 0L, 0L }; // # of inbound frames we would have indicated but couldn't
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// because of resources / error
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LARGE_INTEGER gStatIndicatedBytes = { 0L, 0L }; // # of inbound bytes indicated up
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// Breakdown of indicated frames
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LARGE_INTEGER gStatDirectedIndicatedFrames = { 0L, 0L };
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LARGE_INTEGER gStatMulticastIndicatedFrames = { 0L, 0L };
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LARGE_INTEGER gStatBroadcastIndicatedFrames = { 0L, 0L };
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// Breakdown of indicated bytes
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LARGE_INTEGER gStatDirectedIndicatedBytes = { 0L, 0L };
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LARGE_INTEGER gStatMulticastIndicatedBytes = { 0L, 0L };
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LARGE_INTEGER gStatBroadcastIndicatedBytes = { 0L, 0L };
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//
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// The following stats are not reported to NDIS; they're here for our own amusement
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//
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LARGE_INTEGER gStatReceivedFrames = { 0L, 0L }; // Total # of processed inbound packets
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LARGE_INTEGER gStatReceivedBytes = { 0L, 0L }; // Total inbound processed bytes
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LARGE_INTEGER gStatReceivedCopyFrames = { 0L, 0L }; // Total # of processed inbound packets WITH COPY
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LARGE_INTEGER gStatReceivedCopyBytes = { 0L, 0L }; // Total inbound processed bytes WITH COPY
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LARGE_INTEGER gStatReceivedNoCopyFrames = { 0L, 0L }; // Total # of processed inbound packets WITHOUT COPY
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LARGE_INTEGER gStatReceivedNoCopyBytes = { 0L, 0L }; // Total inbound processed bytes WITHOUT COPY
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// ===========================================================================
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//
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// PRIVATE PROTOTYPES
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//
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// ===========================================================================
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// Undocumented kernel function
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extern KAFFINITY
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KeSetAffinityThread (
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IN PKTHREAD Thread,
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IN KAFFINITY Affinity
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);
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VOID
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BrdgFwdSendOnLink(
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IN PADAPT pAdapt,
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IN PNDIS_PACKET pPacket
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);
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VOID
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BrdgFwdReleaseBasePacket(
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IN PNDIS_PACKET pPacket,
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PPACKET_INFO ppi,
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PACKET_OWNERSHIP Own,
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NDIS_STATUS Status
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);
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// This is the type of function to be passed to BrdgFwdHandlePacket()
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typedef PNDIS_PACKET (*PPACKET_BUILD_FUNC)(PPACKET_INFO*, PADAPT, PVOID, PVOID, UINT, UINT);
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NDIS_STATUS
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BrdgFwdHandlePacket(
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IN PACKET_DIRECTION PacketDirection,
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IN PADAPT pTargetAdapt,
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IN PADAPT pOriginalAdapt,
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IN BOOLEAN bShouldIndicate,
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IN NDIS_HANDLE MiniportHandle,
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IN PNDIS_PACKET pBasePacket,
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IN PPACKET_INFO ppi,
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IN PPACKET_BUILD_FUNC pFunc,
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IN PVOID Param1,
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IN PVOID Param2,
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IN UINT Param3,
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IN UINT Param4
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);
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VOID
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BrdgFwdWrapPacketForReceive(
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IN PNDIS_PACKET pOriginalPacket,
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IN PNDIS_PACKET pNewPacket
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);
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VOID
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BrdgFwdWrapPacketForSend(
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IN PNDIS_PACKET pOriginalPacket,
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IN PNDIS_PACKET pNewPacket
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);
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// The type of function to pass to BrdgFwdCommonAllocAndWrapPacket
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typedef VOID (*PWRAPPER_FUNC)(PNDIS_PACKET, PNDIS_PACKET);
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PNDIS_PACKET
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BrdgFwdCommonAllocAndWrapPacket(
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IN PNDIS_PACKET pBasePacket,
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OUT PPACKET_INFO *pppi,
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IN PADAPT pTargetAdapt,
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IN PWRAPPER_FUNC pFunc
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);
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VOID
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BrdgFwdTransferComplete(
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IN NDIS_HANDLE ProtocolBindingContext,
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IN PNDIS_PACKET pPacket,
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IN NDIS_STATUS Status,
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IN UINT BytesTransferred
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);
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BOOLEAN
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BrdgFwdNoCopyFastTrackReceive(
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IN PNDIS_PACKET pPacket,
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IN PADAPT pAdapt,
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IN NDIS_HANDLE MiniportHandle,
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IN PUCHAR DstAddr,
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OUT BOOLEAN *bRetainPacket
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);
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PNDIS_PACKET
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BrdgFwdMakeCopyBasePacket(
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OUT PPACKET_INFO *pppi,
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IN PVOID pHeader,
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IN PVOID pData,
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IN UINT HeaderSize,
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IN UINT DataSize,
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IN UINT SizeOfPacket,
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IN BOOLEAN bCountAsReceived,
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IN PADAPT pOwnerAdapt,
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PVOID *ppBuf
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);
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PNDIS_PACKET
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BrdgFwdMakeNoCopyBasePacket(
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OUT PPACKET_INFO *pppi,
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IN PADAPT Target,
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IN PVOID Param1,
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IN PVOID Param2,
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IN UINT Param3,
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IN UINT Param4
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);
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PNDIS_PACKET
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BrdgFwdMakeSendBasePacket(
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OUT PPACKET_INFO *pppi,
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IN PADAPT Target,
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IN PVOID Param1,
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IN PVOID Param2,
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IN UINT Param3,
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IN UINT Param4
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);
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// This is the per-processor queue-draining function
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VOID
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BrdgFwdProcessQueuedPackets(
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IN PVOID Param1
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);
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// ===========================================================================
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//
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// INLINES / MACROS
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//
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// ===========================================================================
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//
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// Tells us if we're allowed to bridge, or if GPO's are currently disallowing
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// bridging
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//
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__forceinline
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BOOLEAN
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BrdgFwdBridgingNetworks()
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{
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return gBridging;
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}
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//
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// Frees a packet that was used to wrap a base packet
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//
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__forceinline
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VOID
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BrdgFwdFreeWrapperPacket(
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IN PNDIS_PACKET pPacket,
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IN PPACKET_INFO ppi,
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IN PADAPT pQuotaOwner
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)
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{
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SAFEASSERT( BrdgBufIsWrapperPacket(pPacket) );
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BrdgBufUnchainCopyBuffers( pPacket );
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BrdgBufFreeWrapperPacket( pPacket, ppi, pQuotaOwner );
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}
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//
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// Frees a base packet that wraps a packet descriptor from an overlying protocol
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// or underlying NIC that we were allowed to hang on to
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//
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__forceinline
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VOID
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BrdgFwdFreeBaseWrapperPacket(
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IN PNDIS_PACKET pPacket,
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IN PPACKET_INFO ppi
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)
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{
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SAFEASSERT( BrdgBufIsWrapperPacket(pPacket) );
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BrdgBufUnchainCopyBuffers( pPacket );
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BrdgBufFreeBaseWrapperPacket( pPacket, ppi );
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}
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//
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// Allocates a new wrapper packet, chains on buffer descriptors so that the new
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// packet points to the same data buffers as the old packet, and copies per-packet
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// information appropriate for using the new packet for indications
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//
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__forceinline
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PNDIS_PACKET
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BrdgFwdAllocAndWrapPacketForReceive(
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IN PNDIS_PACKET pPacket,
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OUT PPACKET_INFO *pppi,
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IN PADAPT pTargetAdapt
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)
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{
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return BrdgFwdCommonAllocAndWrapPacket( pPacket, pppi, pTargetAdapt, BrdgFwdWrapPacketForReceive );
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}
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//
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// Allocates a new wrapper packet, chains on buffer descriptors so that the new
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// packet points to the same data buffers as the old packet, and copies per-packet
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// information appropriate for using the new packet for transmits
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//
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__forceinline
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PNDIS_PACKET
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BrdgFwdAllocAndWrapPacketForSend(
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IN PNDIS_PACKET pPacket,
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OUT PPACKET_INFO *pppi,
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IN PADAPT pTargetAdapt
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)
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{
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return BrdgFwdCommonAllocAndWrapPacket( pPacket, pppi, pTargetAdapt, BrdgFwdWrapPacketForSend );
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}
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//
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// Checks if an address is one of the reserved group addresses for the Spanning Tree Algorithm.
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//
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__forceinline
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BOOLEAN
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BrdgFwdIsSTAGroupAddress(
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IN PUCHAR pAddr
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)
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{
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return( (pAddr[0] == STA_MAC_ADDR[0]) && (pAddr[1] == STA_MAC_ADDR[1]) &&
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(pAddr[2] == STA_MAC_ADDR[2]) && (pAddr[3] == STA_MAC_ADDR[4]) &&
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(pAddr[4] == STA_MAC_ADDR[4]) );
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}
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//
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// Checks that PacketDirection has been assigned
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//
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__forceinline
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VOID
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BrdgFwdValidatePacketDirection(
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IN PACKET_DIRECTION Direction
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)
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{
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SAFEASSERT( (Direction == BrdgPacketInbound) || (Direction == BrdgPacketOutbound) ||
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(Direction == BrdgPacketCreatedInBridge) );
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}
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//
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// Queues a packet for deferred processing
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//
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_inline
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VOID
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BrdgFwdQueuePacket(
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IN PPACKET_Q_INFO ppqi,
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IN PADAPT pAdapt
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)
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{
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BOOLEAN bSchedule = FALSE, bIncremented;
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// The queue lock protects the bServiceInProgress flag
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NdisAcquireSpinLock( &pAdapt->QueueLock );
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// Add the packet to the queue
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BrdgInsertTailSingleList( &pAdapt->Queue, &ppqi->List );
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bIncremented = BrdgIncrementWaitRef( &pAdapt->QueueRefcount );
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SAFEASSERT( bIncremented );
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if (bIncremented)
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{
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SAFEASSERT( (ULONG)pAdapt->QueueRefcount.Refcount == pAdapt->Queue.Length );
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// Check if anyone is already working on the queue
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if( !pAdapt->bServiceInProgress )
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{
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// Signal the queue event so someone will wake up
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pAdapt->bServiceInProgress = TRUE;
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bSchedule = TRUE;
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}
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}
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NdisReleaseSpinLock( &pAdapt->QueueLock );
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if( bSchedule )
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{
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KeSetEvent( &pAdapt->QueueEvent, EVENT_INCREMENT, FALSE );
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}
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}
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//
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// Decrements a base packet's refcount and calls BrdgFwdReleaseBasePacket if the refcount
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// reaches zero
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//
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_inline
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BOOLEAN
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BrdgFwdDerefBasePacket(
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IN PADAPT pQuotaOwner, // Can be NULL to not count quota
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IN PNDIS_PACKET pBasePacket,
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IN PPACKET_INFO ppi,
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IN NDIS_STATUS Status
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)
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{
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BOOLEAN rc = FALSE;
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LONG RefCount;
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|
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SAFEASSERT( pBasePacket != NULL );
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SAFEASSERT( ppi != NULL );
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RefCount = NdisInterlockedDecrement( &ppi->u.BasePacketInfo.RefCount );
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SAFEASSERT( RefCount >= 0 );
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if( RefCount == 0 )
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{
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BrdgFwdReleaseBasePacket( pBasePacket, ppi, BrdgBufGetPacketOwnership( pBasePacket ), Status );
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rc = TRUE;
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}
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|
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// Do quota bookkeeping if necessary
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if( pQuotaOwner != NULL )
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{
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BrdgBufReleaseBasePacketQuota( pBasePacket, pQuotaOwner );
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}
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return rc;
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}
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|
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//
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// Updates statistics to reflect a transmitted packet
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//
|
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_inline
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VOID
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BrdgFwdCountTransmittedPacket(
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IN PADAPT pAdapt,
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IN PUCHAR DstAddr,
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IN ULONG PacketSize
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)
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{
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SAFEASSERT( DstAddr != NULL );
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|
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ExInterlockedAddLargeStatistic( &gStatTransmittedFrames, 1L );
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ExInterlockedAddLargeStatistic( &gStatTransmittedBytes, PacketSize );
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|
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ExInterlockedAddLargeStatistic( &pAdapt->SentFrames, 1L );
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ExInterlockedAddLargeStatistic( &pAdapt->SentBytes, PacketSize );
|
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|
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ExInterlockedAddLargeStatistic( &pAdapt->SentLocalFrames, 1L );
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ExInterlockedAddLargeStatistic( &pAdapt->SentLocalBytes, PacketSize );
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|
|
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if( ETH_IS_MULTICAST(DstAddr) )
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{
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ExInterlockedAddLargeStatistic( &gStatMulticastTransmittedFrames, 1L );
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ExInterlockedAddLargeStatistic( &gStatMulticastTransmittedBytes, PacketSize );
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|
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if( ETH_IS_BROADCAST(DstAddr) )
|
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{
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ExInterlockedAddLargeStatistic( &gStatBroadcastTransmittedFrames, 1L );
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ExInterlockedAddLargeStatistic( &gStatBroadcastTransmittedBytes, PacketSize );
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}
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}
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else
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{
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ExInterlockedAddLargeStatistic( &gStatDirectedTransmittedFrames, 1L );
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ExInterlockedAddLargeStatistic( &gStatDirectedTransmittedBytes, PacketSize );
|
|
}
|
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}
|
|
|
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//
|
|
// Updates statistics to reflect an indicated packet
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|
//
|
|
_inline
|
|
VOID
|
|
BrdgFwdCountIndicatedPacket(
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IN PUCHAR DstAddr,
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IN ULONG PacketSize
|
|
)
|
|
{
|
|
ExInterlockedAddLargeStatistic( &gStatIndicatedFrames, 1L );
|
|
ExInterlockedAddLargeStatistic( &gStatIndicatedBytes, PacketSize );
|
|
|
|
if( ETH_IS_MULTICAST(DstAddr) )
|
|
{
|
|
ExInterlockedAddLargeStatistic( &gStatMulticastIndicatedFrames, 1L );
|
|
ExInterlockedAddLargeStatistic( &gStatMulticastIndicatedBytes, PacketSize );
|
|
|
|
if( ETH_IS_BROADCAST(DstAddr) )
|
|
{
|
|
ExInterlockedAddLargeStatistic( &gStatBroadcastIndicatedFrames, 1L );
|
|
ExInterlockedAddLargeStatistic( &gStatBroadcastIndicatedBytes, PacketSize );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ExInterlockedAddLargeStatistic( &gStatDirectedIndicatedFrames, 1L );
|
|
ExInterlockedAddLargeStatistic( &gStatDirectedIndicatedBytes, PacketSize );
|
|
}
|
|
}
|
|
|
|
//
|
|
// Indicates a packet, counting it as such.
|
|
//
|
|
_inline
|
|
VOID
|
|
BrdgFwdIndicatePacket(
|
|
IN PNDIS_PACKET pPacket,
|
|
IN NDIS_HANDLE MiniportHandle
|
|
)
|
|
{
|
|
PVOID pHeader = BrdgBufGetPacketHeader(pPacket);
|
|
|
|
SAFEASSERT( MiniportHandle != NULL );
|
|
|
|
if( pHeader != NULL )
|
|
{
|
|
BrdgFwdCountIndicatedPacket( pHeader, BrdgBufTotalPacketSize(pPacket) );
|
|
}
|
|
// pHeader can only == NULL under heavy system stress
|
|
|
|
NdisMIndicateReceivePacket( MiniportHandle, &pPacket, 1 );
|
|
}
|
|
|
|
// ===========================================================================
|
|
//
|
|
// PUBLIC FUNCTIONS
|
|
//
|
|
// ===========================================================================
|
|
|
|
|
|
NTSTATUS
|
|
BrdgFwdDriverInit()
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Initialization code.
|
|
|
|
A return status other than STATUS_SUCCESS causes the driver load to abort.
|
|
Any event causing an error return code must be logged.
|
|
|
|
Must be called at PASSIVE_LEVEL
|
|
|
|
Arguments:
|
|
|
|
None
|
|
|
|
Return Value:
|
|
|
|
None
|
|
|
|
--*/
|
|
{
|
|
INT i;
|
|
HANDLE ThreadHandle;
|
|
NTSTATUS Status;
|
|
|
|
SAFEASSERT(CURRENT_IRQL == PASSIVE_LEVEL);
|
|
|
|
// Initialize our thread synchronization primitives
|
|
KeInitializeEvent( &gKillThreads, NotificationEvent, FALSE );
|
|
|
|
for(i = 0; i < KeNumberProcessors; i++)
|
|
{
|
|
KeInitializeEvent( &gThreadsCheckAdapters[i], SynchronizationEvent, FALSE );
|
|
|
|
// Spin up a thread for this processor
|
|
Status = PsCreateSystemThread( &ThreadHandle, THREAD_ALL_ACCESS, NULL, NULL, NULL,
|
|
BrdgFwdProcessQueuedPackets, (PVOID)(INT_PTR)i );
|
|
|
|
if(! NT_SUCCESS(Status) )
|
|
{
|
|
// Abort startup
|
|
NdisWriteEventLogEntry( gDriverObject, EVENT_BRIDGE_THREAD_CREATION_FAILED, 0L, 0L, NULL,
|
|
sizeof(NTSTATUS), &Status );
|
|
DBGPRINT(FWD, ("Failed to create a system thread: %08x\n", Status));
|
|
BrdgFwdCleanup();
|
|
return Status;
|
|
}
|
|
|
|
// Retrieve a pointer to the thread object and reference it so we can wait for
|
|
// its termination safely.
|
|
Status = ObReferenceObjectByHandle( ThreadHandle, STANDARD_RIGHTS_ALL, NULL, KernelMode,
|
|
&gThreadPtrs[i], NULL );
|
|
|
|
if(! NT_SUCCESS(Status) )
|
|
{
|
|
// Abort startup
|
|
NdisWriteEventLogEntry( gDriverObject, EVENT_BRIDGE_THREAD_REF_FAILED, 0L, 0L, NULL,
|
|
sizeof(NTSTATUS), &Status );
|
|
DBGPRINT(FWD, ("Couldn't retrieve a thread pointer: %08x\n", Status));
|
|
BrdgFwdCleanup();
|
|
return Status;
|
|
}
|
|
|
|
gNumThreads++;
|
|
}
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
VOID
|
|
BrdgFwdCleanup()
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Unload-time orderly cleanup
|
|
|
|
This function is guaranteed to be called exactly once
|
|
|
|
Must be called at < DISPATCH_LEVEL since we wait on an event
|
|
|
|
Arguments:
|
|
|
|
None
|
|
|
|
Return Value:
|
|
|
|
None
|
|
|
|
--*/
|
|
{
|
|
KWAIT_BLOCK WaitBlocks[MAXIMUM_WAIT_OBJECTS];
|
|
NTSTATUS Status;
|
|
UINT i;
|
|
|
|
SAFEASSERT(CURRENT_IRQL < DISPATCH_LEVEL);
|
|
|
|
// Signal the threads to exit
|
|
KeSetEvent( &gKillThreads, EVENT_INCREMENT, FALSE );
|
|
|
|
// Block waiting for all threads to exit
|
|
Status = KeWaitForMultipleObjects( gNumThreads, gThreadPtrs, WaitAll, Executive,
|
|
KernelMode, FALSE, NULL, WaitBlocks );
|
|
|
|
if( ! NT_SUCCESS(Status) )
|
|
{
|
|
// This really shouldn't happen
|
|
DBGPRINT(FWD, ("KeWaitForMultipleObjects failed in BrdgFwdCleanup! %08x\n", Status));
|
|
SAFEASSERT(FALSE);
|
|
}
|
|
|
|
// Dereference all thread objects to allow them to be destroyed
|
|
for( i = 0; i < gNumThreads; i++ )
|
|
{
|
|
ObDereferenceObject( gThreadPtrs[i] );
|
|
}
|
|
}
|
|
|
|
PNDIS_PACKET
|
|
BrdgFwdMakeCompatCopyPacket(
|
|
IN PNDIS_PACKET pBasePacket,
|
|
OUT PUCHAR *pPacketData,
|
|
OUT PUINT packetDataSize,
|
|
BOOLEAN bCountAsLocalSend
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Allocates a copy packet and fills it with a copy of the data from the given base
|
|
packet. Used by the compatibility-mode code to make a copy packet that it can
|
|
edit easily
|
|
|
|
Arguments:
|
|
|
|
pBasePacket Packet to copy from
|
|
pPacketData Receives a pointer to the flat data buffer of the new packet
|
|
packetDataSize Receives the size of the copied data
|
|
bBasePacketIsInbound TRUE if the packet being copied is outbound from higher-level
|
|
protocols; the packet will be counted as a miniport
|
|
transmission if / when it is send out an adapter.
|
|
FALSE causes the packet to not be counted as a local transmission.
|
|
|
|
Return Value:
|
|
|
|
The new packet
|
|
|
|
--*/
|
|
{
|
|
PNDIS_PACKET pCopyPacket;
|
|
PPACKET_INFO ppi;
|
|
UINT copiedBytes;
|
|
|
|
// Find out how much data is in the base packet
|
|
NdisQueryPacket( pBasePacket, NULL, NULL, NULL, packetDataSize );
|
|
|
|
// Make a base copy packet with no data in it
|
|
pCopyPacket = BrdgFwdMakeCopyBasePacket( &ppi, NULL, NULL, 0, 0, *packetDataSize, FALSE, NULL, pPacketData );
|
|
|
|
if( pCopyPacket == NULL )
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
SAFEASSERT( ppi != NULL );
|
|
SAFEASSERT( *pPacketData != NULL );
|
|
|
|
// Set the original direction flags
|
|
if( bCountAsLocalSend )
|
|
{
|
|
ppi->Flags.OriginalDirection = BrdgPacketOutbound;
|
|
}
|
|
else
|
|
{
|
|
ppi->Flags.OriginalDirection = BrdgPacketCreatedInBridge;
|
|
}
|
|
|
|
// Copy the data from the base packet to the copy packet
|
|
NdisCopyFromPacketToPacket( pCopyPacket, 0, *packetDataSize, pBasePacket, 0, &copiedBytes );
|
|
|
|
if( copiedBytes != *packetDataSize )
|
|
{
|
|
// We couldn't copy all the data. Bail out.
|
|
THROTTLED_DBGPRINT(FWD, ("Failed to copy into a copy packet for compatibility processing\n"));
|
|
BrdgFwdReleaseBasePacket(pCopyPacket, ppi, BrdgBufGetPacketOwnership(pCopyPacket), NDIS_STATUS_RESOURCES);
|
|
return NULL;
|
|
}
|
|
|
|
// Put a pointer to the ppi where we expect to find it on completion
|
|
*((PPACKET_INFO*)pCopyPacket->ProtocolReserved) = ppi;
|
|
*((PPACKET_INFO*)pCopyPacket->MiniportReserved) = ppi;
|
|
|
|
// Do fixups usually performed by BrdgFwdHandlePacket()
|
|
ppi->u.BasePacketInfo.RefCount = 1L;
|
|
ppi->u.BasePacketInfo.CompositeStatus = NDIS_STATUS_FAILURE;
|
|
|
|
// The packet is now ready to be sent. We expect the compatibility code to do its work
|
|
// and call BrdgFwdSendPacketForComp() to transmit the packet.
|
|
return pCopyPacket;
|
|
}
|
|
|
|
VOID
|
|
BrdgFwdSendPacketForCompat(
|
|
IN PNDIS_PACKET pPacket,
|
|
IN PADAPT pAdapt
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Transmits a packet on behalf of the compatibility-mode module.
|
|
The packet must have been previously allocated with BrdgFwdMakeCompatCopyPacket.
|
|
|
|
Arguments:
|
|
|
|
pPacket The packet to transmit
|
|
pAdapt The adapter to transmit on
|
|
|
|
Return Value:
|
|
|
|
None
|
|
|
|
--*/
|
|
{
|
|
PPACKET_INFO ppi;
|
|
NDIS_STATUS status;
|
|
|
|
// Make sure the packet hasn't been monkeyed with inappropriately
|
|
ppi = *((PPACKET_INFO*)pPacket->ProtocolReserved);
|
|
SAFEASSERT( ppi->pOwnerPacket == pPacket );
|
|
SAFEASSERT( ppi->Flags.bIsBasePacket );
|
|
|
|
// Make sure this is a one-shot packet
|
|
ppi->u.BasePacketInfo.RefCount = 1L;
|
|
|
|
// We must do a quota check before sending the packet, as the packet completion
|
|
// logic assumes all sent packets have been assigned to their outbound adapters
|
|
if( BrdgBufAssignBasePacketQuota(pPacket, pAdapt) )
|
|
{
|
|
// We passed quota. Transmit the packet.
|
|
BrdgFwdSendOnLink( pAdapt, pPacket );
|
|
}
|
|
else
|
|
{
|
|
// We didn't pass quota. Fail the transmission.
|
|
DBGPRINT(FWD, ("Failed to send a compatibility packet because of quota failure\n"));
|
|
status = NDIS_STATUS_RESOURCES;
|
|
BrdgFwdReleaseBasePacket(pPacket, ppi, BrdgBufGetPacketOwnership(pPacket), NDIS_STATUS_RESOURCES);
|
|
}
|
|
}
|
|
|
|
VOID
|
|
BrdgFwdIndicatePacketForCompat(
|
|
IN PNDIS_PACKET pPacket
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Indicates a packet on behalf of the compatibility-mode module.
|
|
The packet must be a base copy packet that we own.
|
|
|
|
Arguments:
|
|
|
|
pPacket The packet to indicate
|
|
|
|
Return Value:
|
|
|
|
None
|
|
|
|
--*/
|
|
{
|
|
PPACKET_INFO ppi;
|
|
NDIS_STATUS status;
|
|
NDIS_HANDLE MiniportHandle;
|
|
|
|
// Make sure the packet is a base packet and isn't out of
|
|
// whack
|
|
ppi = *((PPACKET_INFO*)pPacket->MiniportReserved);
|
|
SAFEASSERT( ppi->pOwnerPacket == pPacket );
|
|
SAFEASSERT( ppi->Flags.bIsBasePacket );
|
|
|
|
// Packets that come to us for indication from the compatibility
|
|
// module are our own base packets that haven't had their refcount
|
|
// set yet. Set the packet's refcount to 1, since its buffers
|
|
// should never be shared.
|
|
ppi->u.BasePacketInfo.RefCount = 1L;
|
|
|
|
MiniportHandle = BrdgMiniAcquireMiniportForIndicate();
|
|
|
|
if( MiniportHandle != NULL )
|
|
{
|
|
// Check the quota for the local miniport
|
|
if( BrdgBufAssignBasePacketQuota(pPacket, LOCAL_MINIPORT) )
|
|
{
|
|
// We passed quota.
|
|
BrdgFwdIndicatePacket( pPacket, MiniportHandle );
|
|
}
|
|
else
|
|
{
|
|
// We didn't pass quota. Fail the transmission.
|
|
DBGPRINT(FWD, ("Failed to indicate a compatibility packet because of quota failure\n"));
|
|
status = NDIS_STATUS_RESOURCES;
|
|
BrdgFwdReleaseBasePacket(pPacket, ppi, BrdgBufGetPacketOwnership(pPacket), NDIS_STATUS_RESOURCES);
|
|
}
|
|
|
|
BrdgMiniReleaseMiniportForIndicate();
|
|
}
|
|
else
|
|
{
|
|
// No miniport. Ditch the packet.
|
|
BrdgFwdReleaseBasePacket(pPacket, ppi, BrdgBufGetPacketOwnership(pPacket), NDIS_STATUS_SUCCESS);
|
|
}
|
|
}
|
|
|
|
VOID BrdgFwdReleaseCompatPacket(
|
|
IN PNDIS_PACKET pPacket
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Releases a packet previously allocated with BrdgFwdMakeCompatCopyPacket.
|
|
|
|
Arguments:
|
|
|
|
pPacket The packet to release
|
|
|
|
Return Value:
|
|
|
|
None
|
|
|
|
--*/
|
|
{
|
|
PPACKET_INFO ppi;
|
|
|
|
// Retrieve the PACKET_INFO pointer
|
|
ppi = *((PPACKET_INFO*)pPacket->ProtocolReserved);
|
|
SAFEASSERT( ppi->pOwnerPacket == pPacket );
|
|
SAFEASSERT( ppi->Flags.bIsBasePacket );
|
|
BrdgFwdReleaseBasePacket(pPacket, ppi, BrdgBufGetPacketOwnership(pPacket), NDIS_STATUS_SUCCESS);
|
|
}
|
|
|
|
NDIS_STATUS
|
|
BrdgFwdSendBuffer(
|
|
IN PADAPT pAdapt,
|
|
IN PUCHAR pPacketData,
|
|
IN UINT DataSize
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Sends a raw buffer on a particular adapter. Used to send frames in response
|
|
to user-mode requests.
|
|
|
|
Arguments:
|
|
|
|
pAdapt The adapter to send on
|
|
pPacketData The frame
|
|
DataSize The size of the supplied frame
|
|
|
|
Return Value:
|
|
|
|
Status of the packet transmission
|
|
|
|
--*/
|
|
{
|
|
PNDIS_PACKET pPacket;
|
|
PPACKET_INFO ppi;
|
|
|
|
// Build a packet around this buffer
|
|
pPacket = BrdgFwdMakeCopyBasePacket( &ppi, pPacketData, NULL, DataSize, 0, DataSize, FALSE, NULL, NULL );
|
|
|
|
if( pPacket == NULL )
|
|
{
|
|
return NDIS_STATUS_RESOURCES;
|
|
}
|
|
|
|
SAFEASSERT( ppi != NULL );
|
|
|
|
// We must do a quota check before sending the packet, as the packet completion
|
|
// logic assumes all sent packets have been assigned to their outbound adapters
|
|
if( ! BrdgBufAssignBasePacketQuota(pPacket, pAdapt) )
|
|
{
|
|
// We didn't pass quota. Fail the transmission.
|
|
DBGPRINT(FWD, ("Failed to send a raw buffer because of quota failure\n"));
|
|
BrdgFwdReleaseBasePacket(pPacket, ppi, BrdgBufGetPacketOwnership(pPacket), NDIS_STATUS_RESOURCES);
|
|
return NDIS_STATUS_RESOURCES;
|
|
}
|
|
|
|
// Put a pointer to the ppi where we expect to find it on completion
|
|
*((PPACKET_INFO*)pPacket->ProtocolReserved) = ppi;
|
|
|
|
// Do fixups usually performed by BrdgFwdHandlePacket()
|
|
ppi->u.BasePacketInfo.RefCount = 1L;
|
|
ppi->u.BasePacketInfo.CompositeStatus = NDIS_STATUS_FAILURE;
|
|
|
|
// Send the packet
|
|
BrdgFwdSendOnLink( pAdapt, pPacket );
|
|
|
|
return NDIS_STATUS_SUCCESS;
|
|
}
|
|
|
|
NDIS_STATUS
|
|
BrdgFwdReceive(
|
|
IN NDIS_HANDLE ProtocolBindingContext,
|
|
IN NDIS_HANDLE MacReceiveContext,
|
|
IN PVOID pHeader,
|
|
IN UINT HeaderSize,
|
|
IN PVOID pLookAheadBuffer,
|
|
IN UINT LookAheadSize,
|
|
IN UINT PacketSize
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
NDIS copy-path entry point. Receives an inbound packet on the copy path.
|
|
|
|
Because the indicated data buffers are valid only for the duration of this
|
|
function, we must copy the indicated data to our own packet descriptor
|
|
before proceeding.
|
|
|
|
Arguments:
|
|
|
|
ProtocolBindingContext The receiving adapter
|
|
MacReceiveContext Must be passed as a param to certain Ndis APIs
|
|
pHeader Packet header buffer
|
|
HeaderSize Size of pHeader
|
|
pLookAheadBuffer Buffer with packet data
|
|
LookAheadSize Size of pLookAheadBuffer
|
|
PacketSize Total packet size
|
|
|
|
Return Value:
|
|
|
|
Status of the receive (cannot be NDIS_STATUS_PENDING)
|
|
|
|
--*/
|
|
{
|
|
PADAPT pAdapt = (PADAPT)ProtocolBindingContext, TargetAdapt = NULL;
|
|
PUCHAR SrcAddr = ((PUCHAR)pHeader) + ETH_LENGTH_OF_ADDRESS, DstAddr = pHeader;
|
|
PNDIS_PACKET pNewPacket;
|
|
PPACKET_INFO ppi;
|
|
PPACKET_Q_INFO ppqi;
|
|
UINT SizeOfPacket = HeaderSize + PacketSize;
|
|
BOOLEAN bIsSTAPacket = FALSE, bIsUnicastToBridge = FALSE, bRequiresCompatWork = FALSE;
|
|
UINT result;
|
|
|
|
#if DBG
|
|
// Paranoia check for incorrectly looped-back packets
|
|
{
|
|
PNDIS_PACKET pPacket = NdisGetReceivedPacket(pAdapt->BindingHandle, MacReceiveContext);
|
|
|
|
if( pPacket != NULL )
|
|
{
|
|
SAFEASSERT( BrdgBufGetPacketOwnership(pPacket) == BrdgNotOwned );
|
|
}
|
|
}
|
|
|
|
// Break on packets from gBreakMACAddress
|
|
if( gBreakOnMACAddress )
|
|
{
|
|
ETH_COMPARE_NETWORK_ADDRESSES_EQ( SrcAddr, gBreakMACAddress, &result );
|
|
|
|
if( result == 0 )
|
|
{
|
|
KdBreakPoint();
|
|
}
|
|
}
|
|
#endif
|
|
//
|
|
// We don't accept packets that are sent from our MAC address to us.
|
|
//
|
|
ETH_COMPARE_NETWORK_ADDRESSES_EQ( SrcAddr, gBridgeAddress, &result );
|
|
|
|
if (0 == result)
|
|
{
|
|
return NDIS_STATUS_NOT_ACCEPTED;
|
|
}
|
|
|
|
// Don't accept packets if we are shutting down or this adapter is being torn down or reset
|
|
if( (gShuttingDown) || (pAdapt->bResetting) || (! BrdgAcquireAdapter(pAdapt)) )
|
|
{
|
|
return NDIS_STATUS_NOT_ACCEPTED;
|
|
}
|
|
|
|
// Must have at least a complete Ethernet header!
|
|
if( HeaderSize < ETHERNET_HEADER_SIZE )
|
|
{
|
|
THROTTLED_DBGPRINT(FWD, ("Too-small header seen in BrdgFwdReceive!\n"));
|
|
BrdgReleaseAdapter( pAdapt );
|
|
return NDIS_STATUS_NOT_ACCEPTED;
|
|
}
|
|
|
|
// Packet can't be larger than the maximum size we can handle
|
|
if( SizeOfPacket > MAX_PACKET_SIZE )
|
|
{
|
|
THROTTLED_DBGPRINT(FWD, ("Too-large packet seen in BrdgFwdReceive!\n"));
|
|
BrdgReleaseAdapter( pAdapt );
|
|
return NDIS_STATUS_NOT_ACCEPTED;
|
|
}
|
|
|
|
//
|
|
// If this is an STA packet, we go through all the receive motions regardless of
|
|
// our state
|
|
//
|
|
if( BrdgFwdIsSTAGroupAddress(DstAddr) )
|
|
{
|
|
if( DstAddr[5] == STA_MAC_ADDR[5] )
|
|
{
|
|
bIsSTAPacket = TRUE;
|
|
TargetAdapt = NULL;
|
|
}
|
|
else
|
|
{
|
|
// Packet was sent to a reserved multicast address that we don't use.
|
|
// We mustn't forward the frame.
|
|
BrdgReleaseAdapter( pAdapt );
|
|
return NDIS_STATUS_NOT_ACCEPTED;
|
|
}
|
|
}
|
|
|
|
if( ! bIsSTAPacket )
|
|
{
|
|
// Note the MAC address of the frame if this adapter is learning
|
|
if( (pAdapt->State == Learning) || (pAdapt->State == Forwarding) )
|
|
{
|
|
BrdgTblNoteAddress(SrcAddr, pAdapt);
|
|
}
|
|
|
|
//
|
|
// Check if we are accepting packets or not
|
|
//
|
|
if( pAdapt->State != Forwarding )
|
|
{
|
|
BrdgReleaseAdapter( pAdapt );
|
|
return NDIS_STATUS_NOT_ACCEPTED;
|
|
}
|
|
|
|
//
|
|
// Look up the target in our table.
|
|
// ** TargetAdapt comes back with its refcount incremented!
|
|
//
|
|
TargetAdapt = BrdgTblFindTargetAdapter( DstAddr );
|
|
|
|
// If the target host is known to be on the same segment as the received
|
|
// packet, there is no need to forward the packet.
|
|
//
|
|
// Also bail out here if the target adapter is resetting
|
|
if( (TargetAdapt == pAdapt) ||
|
|
((TargetAdapt != NULL) && (TargetAdapt->bResetting)) )
|
|
{
|
|
BrdgReleaseAdapter( TargetAdapt );
|
|
BrdgReleaseAdapter( pAdapt );
|
|
return NDIS_STATUS_NOT_ACCEPTED;
|
|
}
|
|
|
|
// Learn if this packet requires compatibility-mode processing later
|
|
// (this forces us to copy the packet to our own buffers and queue it)
|
|
bRequiresCompatWork = BrdgCompRequiresCompatWork( pAdapt, pHeader, HeaderSize );
|
|
|
|
// If the packet came in on a compatibility adapter, or is going to
|
|
// a compatibility-mode adapter, but the compatibility code is not
|
|
// interested in it, there is nothing further to be done with the packet.
|
|
if( (pAdapt->bCompatibilityMode || ((TargetAdapt != NULL) && (TargetAdapt->bCompatibilityMode)))
|
|
&&
|
|
(! bRequiresCompatWork) )
|
|
{
|
|
if( TargetAdapt != NULL )
|
|
{
|
|
BrdgReleaseAdapter( TargetAdapt );
|
|
}
|
|
|
|
BrdgReleaseAdapter( pAdapt );
|
|
return NDIS_STATUS_NOT_ACCEPTED;
|
|
}
|
|
|
|
bIsUnicastToBridge = BrdgMiniIsUnicastToBridge(DstAddr);
|
|
|
|
// Sanity
|
|
if( bIsUnicastToBridge && (TargetAdapt != NULL) )
|
|
{
|
|
//
|
|
// This indicates that someone else on the network is using our MAC address,
|
|
// or that there is an undetected loop such that we are seeing our own traffic!
|
|
// Either way, this is very bad.
|
|
//
|
|
THROTTLED_DBGPRINT(FWD, ("*** Have a table entry for our own MAC address! PROBABLE NET LOOP!\n"));
|
|
|
|
// Ditch the target adapter since we won't be using it
|
|
BrdgReleaseAdapter( TargetAdapt );
|
|
TargetAdapt = NULL;
|
|
}
|
|
}
|
|
// else was STA packet; continue processing below
|
|
|
|
//
|
|
// There is no fast-track on the copy-receive path. Copy the packet data into our
|
|
// own descriptor and queue the packet for processing later.
|
|
//
|
|
if (LookAheadSize == PacketSize)
|
|
{
|
|
// A normal, non-fragmented indicate. Copy the data to a new packet.
|
|
pNewPacket = BrdgFwdMakeCopyBasePacket( &ppi, pHeader, pLookAheadBuffer, HeaderSize, LookAheadSize,
|
|
SizeOfPacket, TRUE, pAdapt, NULL );
|
|
|
|
if( pNewPacket == NULL )
|
|
{
|
|
// We failed to get a copy packet to wrap this data
|
|
goto failure;
|
|
}
|
|
|
|
SAFEASSERT( ppi != NULL );
|
|
|
|
if (bRequiresCompatWork && (TargetAdapt == NULL) && !bIsUnicastToBridge)
|
|
{
|
|
TargetAdapt = BrdgCompFindTargetAdapterForIPAddress(pNewPacket);
|
|
if (TargetAdapt && !BrdgAcquireAdapter(TargetAdapt))
|
|
{
|
|
return NDIS_STATUS_NOT_ACCEPTED;
|
|
}
|
|
}
|
|
|
|
// Queue the new packet for processing
|
|
ppqi = (PPACKET_Q_INFO)&pNewPacket->ProtocolReserved;
|
|
|
|
ppqi->u.pTargetAdapt = TargetAdapt;
|
|
ppqi->pInfo = ppi;
|
|
ppqi->Flags.bIsSTAPacket = bIsSTAPacket;
|
|
ppqi->Flags.bFastTrackReceive = FALSE;
|
|
ppqi->Flags.bRequiresCompatWork = bRequiresCompatWork;
|
|
|
|
if( bIsUnicastToBridge )
|
|
{
|
|
SAFEASSERT( TargetAdapt == NULL );
|
|
ppqi->Flags.bIsUnicastToBridge = TRUE;
|
|
ppqi->Flags.bShouldIndicate = TRUE;
|
|
}
|
|
else
|
|
{
|
|
ppqi->Flags.bIsUnicastToBridge = FALSE;
|
|
ppqi->Flags.bShouldIndicate = BrdgMiniShouldIndicatePacket(DstAddr);
|
|
}
|
|
|
|
BrdgFwdQueuePacket( ppqi, pAdapt );
|
|
}
|
|
else
|
|
{
|
|
NDIS_STATUS Status;
|
|
UINT transferred;
|
|
PNDIS_BUFFER pBufDesc;
|
|
PUCHAR pBuf;
|
|
|
|
//
|
|
// This is an unusual code path in this day and age; the underlying driver
|
|
// is an old NDIS driver that still does fragmented receives.
|
|
//
|
|
SAFEASSERT( LookAheadSize < PacketSize );
|
|
|
|
// Get copy packet and copy in the header data (but NOT the lookahead)
|
|
pNewPacket = BrdgFwdMakeCopyBasePacket( &ppi, pHeader, NULL, HeaderSize, 0, SizeOfPacket, TRUE, pAdapt, &pBuf );
|
|
|
|
if( pNewPacket == NULL )
|
|
{
|
|
// We failed to get a copy packet
|
|
goto failure;
|
|
}
|
|
|
|
SAFEASSERT( ppi != NULL );
|
|
SAFEASSERT( pBuf != NULL );
|
|
|
|
//
|
|
// NdisTransferData is kind of a crummy API; it won't copy the entire packet
|
|
// (i.e., you have to copy the header separately), and it won't let you specify
|
|
// an offset in the receiving packet to copy to. The NIC wants to copy into the
|
|
// beginning of the first buffer chained to the packet.
|
|
//
|
|
// Because of this silliness, we copy the header into the beginning of our copy
|
|
// packet's data buffer (done in the call to BrdgFwdMakeCopyBasePacket above).
|
|
//
|
|
// Then we grab a NEW buffer descriptor, point it to the area of the data buffer
|
|
// *after* the header, and chain it to the front of the packet. Then we request
|
|
// that all data (other than the header) be copied.
|
|
//
|
|
// In BrdgFwdTransferComplete, we rip off the leading buffer descriptor and
|
|
// dispose of it, leaving a single buffer descriptor that correctly describes
|
|
// the (single) data buffer, now containing all data.
|
|
//
|
|
pBufDesc = BrdgBufAllocateBuffer( pBuf + HeaderSize, PacketSize );
|
|
|
|
if( pBufDesc == NULL )
|
|
{
|
|
BrdgFwdReleaseBasePacket( pNewPacket, ppi, BrdgBufGetPacketOwnership(pNewPacket),
|
|
NDIS_STATUS_FAILURE );
|
|
|
|
goto failure;
|
|
}
|
|
|
|
// Chain this to the front of the packet where it will be used during the copy
|
|
NdisChainBufferAtFront( pNewPacket, pBufDesc );
|
|
|
|
// Set up the queuing structure in the packet's ProtocolReserved area
|
|
ppqi = (PPACKET_Q_INFO)&pNewPacket->ProtocolReserved;
|
|
ppqi->u.pTargetAdapt = TargetAdapt;
|
|
ppqi->pInfo = ppi;
|
|
ppqi->Flags.bIsSTAPacket = bIsSTAPacket;
|
|
ppqi->Flags.bFastTrackReceive = FALSE;
|
|
ppqi->Flags.bRequiresCompatWork = bRequiresCompatWork;
|
|
|
|
if( bIsUnicastToBridge )
|
|
{
|
|
SAFEASSERT( TargetAdapt == NULL );
|
|
ppqi->Flags.bIsUnicastToBridge = TRUE;
|
|
ppqi->Flags.bShouldIndicate = TRUE;
|
|
}
|
|
else
|
|
{
|
|
ppqi->Flags.bIsUnicastToBridge = FALSE;
|
|
ppqi->Flags.bShouldIndicate = BrdgMiniShouldIndicatePacket(DstAddr);
|
|
}
|
|
|
|
// Ask the NIC to copy the packet's data into the new packet
|
|
NdisTransferData( &Status, pAdapt->BindingHandle, MacReceiveContext, 0, PacketSize,
|
|
pNewPacket, &transferred );
|
|
|
|
if( Status == NDIS_STATUS_SUCCESS )
|
|
{
|
|
// Call BrdgFwdTransferComplete by hand to postprocess the packet.
|
|
BrdgFwdTransferComplete( (NDIS_HANDLE)pAdapt, pNewPacket, Status, transferred );
|
|
}
|
|
else if( Status != NDIS_STATUS_PENDING )
|
|
{
|
|
// The transfer failed for some reason.
|
|
NdisUnchainBufferAtFront( pNewPacket, &pBufDesc );
|
|
|
|
if( pBufDesc != NULL )
|
|
{
|
|
NdisFreeBuffer( pBufDesc );
|
|
}
|
|
else
|
|
{
|
|
SAFEASSERT( FALSE );
|
|
}
|
|
|
|
BrdgFwdReleaseBasePacket( pNewPacket, ppi, BrdgBufGetPacketOwnership(pNewPacket),
|
|
NDIS_STATUS_FAILURE );
|
|
|
|
goto failure;
|
|
}
|
|
// else BrdgFwdTransferComplete will be called to postprocess the packet.
|
|
}
|
|
|
|
BrdgReleaseAdapter( pAdapt );
|
|
return NDIS_STATUS_SUCCESS;
|
|
|
|
failure:
|
|
if( TargetAdapt != NULL )
|
|
{
|
|
BrdgReleaseAdapter( TargetAdapt );
|
|
}
|
|
|
|
if( BrdgMiniShouldIndicatePacket(DstAddr) )
|
|
{
|
|
ExInterlockedAddLargeStatistic( &gStatIndicatedDroppedFrames, 1L );
|
|
}
|
|
|
|
BrdgReleaseAdapter( pAdapt );
|
|
return NDIS_STATUS_NOT_ACCEPTED;
|
|
}
|
|
|
|
VOID
|
|
BrdgFwdTransferComplete(
|
|
IN NDIS_HANDLE ProtocolBindingContext,
|
|
IN PNDIS_PACKET pPacket,
|
|
IN NDIS_STATUS Status,
|
|
IN UINT BytesTransferred
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
NDIS entry point, registered in BrdgProtRegisterProtocol. Called when a
|
|
call to NdisTransferData() that returned NDIS_STATUS_PENDING completes
|
|
(we also call this by hand to postprocess a call that completes immediately).
|
|
|
|
If the data copy from the underlying NIC was successful, the packet is
|
|
queued for processing on the owner adapter's queue. Otherwise the packet
|
|
is released.
|
|
|
|
Arguments:
|
|
|
|
ProtocolBindingContext The receiving adapter
|
|
pPacket The base packet into which data was being copied
|
|
Status Status of the copy
|
|
BytesTransferred Number of transferred bytes (unused)
|
|
|
|
Return Value:
|
|
|
|
None
|
|
|
|
--*/
|
|
{
|
|
PADAPT pAdapt = (PADAPT)ProtocolBindingContext;
|
|
PPACKET_Q_INFO ppqi = (PPACKET_Q_INFO)&pPacket->ProtocolReserved;
|
|
PNDIS_BUFFER pBuf;
|
|
|
|
SAFEASSERT( pAdapt != NULL );
|
|
SAFEASSERT( pPacket != NULL );
|
|
SAFEASSERT( ppqi->pInfo != NULL );
|
|
SAFEASSERT( ppqi->pInfo->pOwnerPacket == pPacket );
|
|
SAFEASSERT( ppqi->Flags.bFastTrackReceive == FALSE );
|
|
|
|
// Remove the extra buffer descriptor on the front of the packet and dispose of it
|
|
// (see comments in BrdgFwdReceive() for details)
|
|
NdisUnchainBufferAtFront( pPacket, &pBuf );
|
|
|
|
if( pBuf != NULL )
|
|
{
|
|
NdisFreeBuffer( pBuf );
|
|
}
|
|
else
|
|
{
|
|
// Should never happen
|
|
SAFEASSERT( FALSE );
|
|
}
|
|
|
|
// We should still have the original buffer descriptor describing the entire data buffer
|
|
// chained to the packet
|
|
SAFEASSERT( BrdgBufPacketHeadBuffer(pPacket) != NULL );
|
|
|
|
if( Status != NDIS_STATUS_SUCCESS )
|
|
{
|
|
// The copy failed. Undo everything.
|
|
if( ppqi->u.pTargetAdapt != NULL )
|
|
{
|
|
BrdgReleaseAdapter( ppqi->u.pTargetAdapt );
|
|
}
|
|
|
|
if( ppqi->Flags.bShouldIndicate )
|
|
{
|
|
ExInterlockedAddLargeStatistic( &gStatIndicatedDroppedFrames, 1L );
|
|
}
|
|
|
|
BrdgFwdReleaseBasePacket( pPacket, ppqi->pInfo, BrdgBufGetPacketOwnership(pPacket), Status );
|
|
}
|
|
else
|
|
{
|
|
// Success! Queue the packet for processing
|
|
BrdgFwdQueuePacket( ppqi, pAdapt );
|
|
}
|
|
}
|
|
|
|
INT
|
|
BrdgFwdReceivePacket(
|
|
IN NDIS_HANDLE ProtocolBindingContext,
|
|
IN PNDIS_PACKET pPacket
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
NDIS no-copy entry point
|
|
|
|
Receives a packet on the no-copy path
|
|
|
|
Arguments:
|
|
|
|
ProtocolBindingContext The adapter on which the packet is received
|
|
pPacket The received packet
|
|
|
|
Return Value:
|
|
|
|
The number of times we will call NdisReturnPackets() to free this packet.
|
|
We return 0 to complete immediately or 1 to pend.
|
|
|
|
--*/
|
|
{
|
|
PADAPT pAdapt = (PADAPT)ProtocolBindingContext, TargetAdapt;
|
|
UINT PacketSize;
|
|
PNDIS_BUFFER Buffer;
|
|
PUCHAR DstAddr, SrcAddr;
|
|
UINT Size;
|
|
PPACKET_Q_INFO ppqi;
|
|
INT rc;
|
|
BOOLEAN bForceCopy = FALSE, bFastTrack = FALSE, bIsUnicastToBridge = FALSE,
|
|
bRequiresCompatWork = FALSE;
|
|
|
|
// Paranoia check for incorrectly looped-back packets
|
|
SAFEASSERT( BrdgBufGetPacketOwnership(pPacket) == BrdgNotOwned );
|
|
|
|
// Don't receive packets if we are shutting down or this adapter is being torn down or reset
|
|
if ( gShuttingDown || (pAdapt->bResetting) || (! BrdgAcquireAdapter(pAdapt)) )
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
NdisQueryPacket(pPacket, NULL, NULL, &Buffer, &PacketSize);
|
|
|
|
if (!Buffer)
|
|
{
|
|
BrdgReleaseAdapter( pAdapt );
|
|
return 0;
|
|
}
|
|
|
|
NdisQueryBufferSafe(Buffer, &DstAddr, &Size, NormalPagePriority);
|
|
|
|
if( DstAddr == NULL )
|
|
{
|
|
BrdgReleaseAdapter( pAdapt );
|
|
return 0;
|
|
}
|
|
|
|
// Must have at least a complete Ethernet header!
|
|
if( Size < ETHERNET_HEADER_SIZE )
|
|
{
|
|
THROTTLED_DBGPRINT(FWD, ("Packet smaller than Ethernet header seen!\n"));
|
|
BrdgReleaseAdapter( pAdapt );
|
|
return 0;
|
|
}
|
|
|
|
// Packet can't be larger than the maximum we can handle
|
|
if( Size > MAX_PACKET_SIZE )
|
|
{
|
|
THROTTLED_DBGPRINT(FWD, ("Over-large packet seen!\n"));
|
|
BrdgReleaseAdapter( pAdapt );
|
|
return 0;
|
|
}
|
|
|
|
SrcAddr = DstAddr + ETH_LENGTH_OF_ADDRESS;
|
|
|
|
#if DBG
|
|
// Break on packets from gBreakMACAddress
|
|
if( gBreakOnMACAddress )
|
|
{
|
|
UINT result;
|
|
|
|
ETH_COMPARE_NETWORK_ADDRESSES_EQ( SrcAddr, gBreakMACAddress, &result );
|
|
|
|
if( result == 0 )
|
|
{
|
|
KdBreakPoint();
|
|
}
|
|
}
|
|
#endif
|
|
|
|
//
|
|
// If this is an STA packet, don't process it, but hand it off
|
|
//
|
|
if( BrdgFwdIsSTAGroupAddress(DstAddr) )
|
|
{
|
|
if( (! gDisableSTA) && (DstAddr[5] == STA_MAC_ADDR[5]))
|
|
{
|
|
if (BrdgFwdBridgingNetworks())
|
|
{
|
|
// Hand off this packet for processing
|
|
BrdgSTAReceivePacket( pAdapt, pPacket );
|
|
}
|
|
}
|
|
|
|
BrdgReleaseAdapter( pAdapt );
|
|
return 0;
|
|
}
|
|
|
|
// Note the MAC address of the frame if this adapter is learning
|
|
if( (pAdapt->State == Learning) || (pAdapt->State == Forwarding) )
|
|
{
|
|
BrdgTblNoteAddress(SrcAddr, pAdapt);
|
|
}
|
|
|
|
//
|
|
// Check if we are accepting packets or not
|
|
//
|
|
if( pAdapt->State != Forwarding )
|
|
{
|
|
BrdgReleaseAdapter( pAdapt );
|
|
return 0;
|
|
}
|
|
|
|
// Look up the target in our table
|
|
TargetAdapt = BrdgTblFindTargetAdapter( DstAddr );
|
|
|
|
// If the target host is known to be on the same segment as the received
|
|
// packet, there is no need to forward the packet.
|
|
//
|
|
// Also bail out if the target adapter is resetting
|
|
if( (TargetAdapt == pAdapt) ||
|
|
((TargetAdapt != NULL) && (TargetAdapt->bResetting)) )
|
|
{
|
|
BrdgReleaseAdapter( TargetAdapt );
|
|
BrdgReleaseAdapter( pAdapt );
|
|
return 0;
|
|
}
|
|
|
|
// Check if the packet will require compatibility-mode processing
|
|
bRequiresCompatWork = BrdgCompRequiresCompatWork( pAdapt, DstAddr, Size );
|
|
|
|
// If a packet requires compatibility work, we MUST copy it so the
|
|
// compatibility code has a flat, editable buffer to work with.
|
|
if( bRequiresCompatWork )
|
|
{
|
|
bForceCopy = TRUE;
|
|
}
|
|
|
|
// If the packet came in on a compatibility adapter, or is going to
|
|
// a compatibility-mode adapter, but the compatibility code is not
|
|
// interested in it, there is nothing further to be done with the packet.
|
|
if( (pAdapt->bCompatibilityMode || ((TargetAdapt != NULL) && (TargetAdapt->bCompatibilityMode)))
|
|
&&
|
|
(! bRequiresCompatWork) )
|
|
{
|
|
if( TargetAdapt != NULL )
|
|
{
|
|
BrdgReleaseAdapter( TargetAdapt );
|
|
}
|
|
|
|
BrdgReleaseAdapter( pAdapt );
|
|
return 0;
|
|
}
|
|
|
|
//
|
|
// If this packet is a unicast packet ONLY for the local machine,
|
|
// we can fast-track it by just passing through the indication to
|
|
// upper-layer protocols.
|
|
//
|
|
// We can't pull this stunt if the packet requires compatibility-mode
|
|
// processing.
|
|
//
|
|
|
|
bIsUnicastToBridge = BrdgMiniIsUnicastToBridge(DstAddr);
|
|
|
|
if( bIsUnicastToBridge && (!bRequiresCompatWork) )
|
|
{
|
|
NDIS_HANDLE MiniportHandle;
|
|
BOOLEAN bRemaining, bRetain;
|
|
|
|
if( TargetAdapt != NULL )
|
|
{
|
|
//
|
|
// This indicates that someone else on the network is using our MAC address,
|
|
// or that there is an undetected loop such that we are seeing our own traffic!
|
|
// Either way, this is very bad.
|
|
//
|
|
THROTTLED_DBGPRINT(FWD, ("** Have a table entry for our own MAC address! PROBABLE NET LOOP!\n"));
|
|
|
|
// We won't be needing the target adapter
|
|
BrdgReleaseAdapter( TargetAdapt );
|
|
TargetAdapt = NULL;
|
|
}
|
|
|
|
MiniportHandle = BrdgMiniAcquireMiniportForIndicate();
|
|
|
|
if( MiniportHandle == NULL )
|
|
{
|
|
// Nothing to do with this packet since we don't have a miniport to
|
|
// indicate it with!
|
|
BrdgReleaseAdapter( pAdapt );
|
|
return 0;
|
|
}
|
|
|
|
//
|
|
// Figure out if it's possible to fast-track this packet
|
|
//
|
|
NdisIMGetCurrentPacketStack(pPacket, &bRemaining);
|
|
|
|
if( bRemaining )
|
|
{
|
|
//
|
|
// We can fast-track right away if the packet queue for this adapter
|
|
// is empty. Otherwise, we would be cutting ahead of other packets from this
|
|
// adapter.
|
|
//
|
|
if( ! pAdapt->bServiceInProgress )
|
|
{
|
|
// We can fast-track this packet right now.
|
|
|
|
if( BrdgFwdNoCopyFastTrackReceive(pPacket, pAdapt, MiniportHandle, DstAddr, &bRetain) )
|
|
{
|
|
// bRetain tells us whether to retain ownership of this packet or not
|
|
BrdgReleaseAdapter( pAdapt );
|
|
BrdgMiniReleaseMiniportForIndicate();
|
|
return bRetain ? 1 : 0;
|
|
}
|
|
else
|
|
{
|
|
// This should never happen since we checked to see if there was stack room
|
|
SAFEASSERT( FALSE );
|
|
|
|
bForceCopy = TRUE;
|
|
bFastTrack = FALSE;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// We want to fast-track this packet but the processing queue is not
|
|
// empty. Flag it for fast-tracking in the queue draining thread.
|
|
bFastTrack = TRUE;
|
|
bForceCopy = FALSE;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// Force this packet to be copied into a base packet since
|
|
// we know it can't be fast-tracked.
|
|
bForceCopy = TRUE;
|
|
bFastTrack = FALSE;
|
|
}
|
|
|
|
// Allow the miniport to shut down
|
|
BrdgMiniReleaseMiniportForIndicate();
|
|
}
|
|
|
|
//
|
|
// We couldn't fast-track the packet. We will have to queue it for processing.
|
|
//
|
|
|
|
if ( bForceCopy || !bFastTrack || (NDIS_GET_PACKET_STATUS(pPacket) == NDIS_STATUS_RESOURCES) )
|
|
{
|
|
// We must copy this packet's data.
|
|
PNDIS_PACKET pNewPacket;
|
|
PPACKET_INFO ppi;
|
|
UINT copied;
|
|
|
|
// Get a new copy packet with nothing copied in yet.
|
|
pNewPacket = BrdgFwdMakeCopyBasePacket( &ppi, NULL, NULL, 0, 0, PacketSize, TRUE, pAdapt, NULL );
|
|
|
|
if( pNewPacket == NULL )
|
|
{
|
|
// Failed to get a copy packet to hold the data.
|
|
goto failure;
|
|
}
|
|
|
|
SAFEASSERT( ppi != NULL );
|
|
|
|
// Copy data out of the old packet into the new one
|
|
NdisCopyFromPacketToPacket( pNewPacket, 0, PacketSize, pPacket, 0, &copied );
|
|
|
|
if( copied != PacketSize )
|
|
{
|
|
BrdgFwdReleaseBasePacket( pNewPacket, ppi, BrdgBufGetPacketOwnership(pNewPacket),
|
|
NDIS_STATUS_FAILURE );
|
|
|
|
goto failure;
|
|
}
|
|
|
|
if (bRequiresCompatWork && (TargetAdapt == NULL) && !bIsUnicastToBridge)
|
|
{
|
|
TargetAdapt = BrdgCompFindTargetAdapterForIPAddress(pNewPacket);
|
|
if (TargetAdapt && !BrdgAcquireAdapter(TargetAdapt))
|
|
{
|
|
TargetAdapt = NULL;
|
|
}
|
|
}
|
|
|
|
// Queue the new base packet for processing
|
|
ppqi = (PPACKET_Q_INFO)&pNewPacket->ProtocolReserved;
|
|
ppqi->pInfo = ppi;
|
|
ppqi->u.pTargetAdapt = TargetAdapt;
|
|
ppqi->Flags.bIsSTAPacket = FALSE;
|
|
ppqi->Flags.bFastTrackReceive = FALSE;
|
|
ppqi->Flags.bRequiresCompatWork = bRequiresCompatWork;
|
|
|
|
if( bIsUnicastToBridge )
|
|
{
|
|
SAFEASSERT( TargetAdapt == NULL );
|
|
ppqi->Flags.bIsUnicastToBridge = TRUE;
|
|
ppqi->Flags.bShouldIndicate = TRUE;
|
|
}
|
|
else
|
|
{
|
|
ppqi->Flags.bIsUnicastToBridge = FALSE;
|
|
ppqi->Flags.bShouldIndicate = BrdgMiniShouldIndicatePacket(DstAddr);
|
|
}
|
|
|
|
// The NIC gets its packet back immediately since we copied its data
|
|
rc = 0;
|
|
}
|
|
else
|
|
{
|
|
// Queue the original packet for processing
|
|
ppqi = (PPACKET_Q_INFO)&pPacket->ProtocolReserved;
|
|
ppqi->pInfo = NULL;
|
|
ppqi->Flags.bIsSTAPacket = FALSE;
|
|
ppqi->Flags.bIsUnicastToBridge = bIsUnicastToBridge;
|
|
ppqi->Flags.bRequiresCompatWork = bRequiresCompatWork;
|
|
|
|
if( bFastTrack )
|
|
{
|
|
SAFEASSERT( bIsUnicastToBridge );
|
|
SAFEASSERT( TargetAdapt == NULL );
|
|
ppqi->Flags.bFastTrackReceive = TRUE;
|
|
ppqi->Flags.bShouldIndicate = TRUE;
|
|
ppqi->u.pOriginalAdapt = pAdapt;
|
|
}
|
|
else
|
|
{
|
|
ppqi->Flags.bFastTrackReceive = FALSE;
|
|
ppqi->u.pTargetAdapt = TargetAdapt;
|
|
|
|
if( bIsUnicastToBridge )
|
|
{
|
|
SAFEASSERT( TargetAdapt == NULL );
|
|
ppqi->Flags.bShouldIndicate = TRUE;
|
|
}
|
|
else
|
|
{
|
|
ppqi->Flags.bShouldIndicate = BrdgMiniShouldIndicatePacket(DstAddr);
|
|
}
|
|
}
|
|
|
|
// We require the use of the packet until our processing is complete
|
|
rc = 1;
|
|
}
|
|
|
|
// Queue the packet for processing
|
|
BrdgFwdQueuePacket( ppqi, pAdapt );
|
|
|
|
BrdgReleaseAdapter( pAdapt );
|
|
return rc;
|
|
|
|
failure:
|
|
if( TargetAdapt != NULL )
|
|
{
|
|
BrdgReleaseAdapter( TargetAdapt );
|
|
}
|
|
|
|
if( BrdgMiniShouldIndicatePacket(DstAddr) )
|
|
{
|
|
ExInterlockedAddLargeStatistic( &gStatIndicatedDroppedFrames, 1L );
|
|
}
|
|
|
|
BrdgReleaseAdapter( pAdapt );
|
|
|
|
// We are done with this packet
|
|
return 0;
|
|
}
|
|
|
|
NDIS_STATUS
|
|
BrdgFwdSendPacket(
|
|
IN PNDIS_PACKET pPacket
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Called to handle the transmission of a packet from an overlying protocol
|
|
|
|
Arguments:
|
|
|
|
pPacket The packet to send
|
|
|
|
Return Value:
|
|
|
|
Status of the send (NDIS_STATUS_PENDING means the send will be completed later)
|
|
|
|
--*/
|
|
{
|
|
PNDIS_BUFFER Buffer;
|
|
PUCHAR DstAddr;
|
|
UINT Size;
|
|
PADAPT TargetAdapt;
|
|
BOOLEAN bRemaining;
|
|
NDIS_STATUS Status;
|
|
PNDIS_PACKET_STACK pStack;
|
|
|
|
NdisQueryPacket(pPacket, NULL, NULL, &Buffer, NULL);
|
|
NdisQueryBufferSafe(Buffer, &DstAddr, &Size, NormalPagePriority);
|
|
|
|
if( DstAddr == NULL )
|
|
{
|
|
return NDIS_STATUS_RESOURCES;
|
|
}
|
|
|
|
//
|
|
// See if we know the adapter to reach the target through
|
|
//
|
|
TargetAdapt = BrdgTblFindTargetAdapter( DstAddr );
|
|
|
|
// Fail silently if the target adapter is resetting
|
|
if( (TargetAdapt != NULL) && (TargetAdapt->bResetting) )
|
|
{
|
|
BrdgReleaseAdapter( TargetAdapt );
|
|
return NDIS_STATUS_SUCCESS;
|
|
}
|
|
|
|
// Do compatibility processing, unless the packet is going to
|
|
// a known target that isn't on a compatibility adapter (in
|
|
// which case no compatibility processing is required).
|
|
if( (TargetAdapt == NULL) || (TargetAdapt->bCompatibilityMode) )
|
|
{
|
|
BrdgCompProcessOutboundPacket( pPacket, TargetAdapt );
|
|
}
|
|
|
|
// If the target adapter is in compatibility-mode, no processing
|
|
// other than the compatibility processing is required.
|
|
if( (TargetAdapt != NULL) && (TargetAdapt->bCompatibilityMode) )
|
|
{
|
|
// We're done with this packet!
|
|
BrdgReleaseAdapter( TargetAdapt );
|
|
return NDIS_STATUS_SUCCESS;
|
|
}
|
|
|
|
//
|
|
// We can fast-track the packet if there is an NDIS stack slot available
|
|
// for use and there is a single target adapter to send on.
|
|
//
|
|
pStack = NdisIMGetCurrentPacketStack(pPacket, &bRemaining);
|
|
|
|
if( (TargetAdapt != NULL) && bRemaining && (pStack != NULL) )
|
|
{
|
|
// We fiddle with some of the packet flags when sending a packet. Remember the
|
|
// state of the flags we change so we can restore them before handing back the
|
|
// packet when the send completes.
|
|
*((PUINT)(pStack->IMReserved)) = NdisGetPacketFlags(pPacket) & CHANGED_PACKET_FLAGS;
|
|
|
|
// Just fast-track it out the target adapter
|
|
BrdgFwdSendOnLink( TargetAdapt, pPacket );
|
|
|
|
// Done with the adapter pointer
|
|
BrdgReleaseAdapter( TargetAdapt );
|
|
|
|
// We retain the buffers until we're done
|
|
return NDIS_STATUS_PENDING;
|
|
}
|
|
|
|
//
|
|
// Can't fast-track for whatever reason. We need to take the slow path through BrdgFwdHandlePacket
|
|
//
|
|
Status = BrdgFwdHandlePacket( BrdgPacketOutbound, TargetAdapt, NULL /* No source adapter */, FALSE /* Do not indicate */,
|
|
NULL /*No miniport handle because no indication*/, NULL, NULL, /*No base packet yet*/
|
|
BrdgFwdMakeSendBasePacket, pPacket, NULL, 0, 0 );
|
|
|
|
if( TargetAdapt != NULL )
|
|
{
|
|
// We're done with this adapter pointer
|
|
BrdgReleaseAdapter( TargetAdapt );
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
VOID
|
|
BrdgFwdCleanupPacket(
|
|
IN PADAPT pAdapt,
|
|
IN PNDIS_PACKET pPacket,
|
|
IN NDIS_STATUS Status
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
NDIS entry point called when a packet transmission has completed
|
|
|
|
Arguments:
|
|
|
|
ProtocolBindingContext The adapter on which the packet was send
|
|
pPacket The transmitted packet
|
|
Status The status of the send
|
|
|
|
Return Value:
|
|
|
|
None
|
|
|
|
--*/
|
|
{
|
|
PACKET_OWNERSHIP Own;
|
|
|
|
// Find out whether we own this packet
|
|
Own = BrdgBufGetPacketOwnership(pPacket);
|
|
|
|
if( Own == BrdgNotOwned )
|
|
{
|
|
NDIS_HANDLE MiniportHandle;
|
|
PNDIS_PACKET_STACK pStack;
|
|
BOOLEAN bRemaining;
|
|
|
|
// This packet must have been a fast-track send. Return it to
|
|
// its upper-layer owner.
|
|
|
|
// Restore the flags that we change on a packet send by retrieving the
|
|
// stored state of these flags that we stashed in IMReserved in
|
|
// BrdgFwdSendPacket.
|
|
pStack = NdisIMGetCurrentPacketStack(pPacket, &bRemaining);
|
|
|
|
if( (pStack != NULL) && bRemaining )
|
|
{
|
|
NdisClearPacketFlags( pPacket, CHANGED_PACKET_FLAGS );
|
|
NdisSetPacketFlags( pPacket, *((PUINT)(pStack->IMReserved)) );
|
|
}
|
|
else
|
|
{
|
|
// There was stack room on the way down so this shouldn't happen.
|
|
SAFEASSERT( FALSE );
|
|
}
|
|
|
|
if( Status == NDIS_STATUS_SUCCESS )
|
|
{
|
|
PVOID pHeader = BrdgBufGetPacketHeader(pPacket);
|
|
|
|
if( pHeader != NULL )
|
|
{
|
|
BrdgFwdCountTransmittedPacket( pAdapt, pHeader, BrdgBufTotalPacketSize(pPacket) );
|
|
}
|
|
// pHeader can only be NULL under heavy system stress
|
|
}
|
|
else
|
|
{
|
|
ExInterlockedAddLargeStatistic( &gStatTransmittedErrorFrames, 1L );
|
|
}
|
|
|
|
// NDIS should prevent the miniport from shutting down while
|
|
// there is still a send pending.
|
|
MiniportHandle = BrdgMiniAcquireMiniport();
|
|
SAFEASSERT( MiniportHandle != NULL );
|
|
NdisMSendComplete( MiniportHandle, pPacket, Status );
|
|
BrdgMiniReleaseMiniport();
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// We allocated this packet ourselves.
|
|
//
|
|
|
|
// Recover the info pointer from our reserved area in the packet header
|
|
PPACKET_INFO ppi = *((PPACKET_INFO*)pPacket->ProtocolReserved),
|
|
baseppi;
|
|
PNDIS_PACKET pBasePacket;
|
|
|
|
if( ppi->Flags.bIsBasePacket == FALSE )
|
|
{
|
|
// This packet is using buffers from another packet.
|
|
baseppi = ppi->u.pBasePacketInfo;
|
|
SAFEASSERT( baseppi != NULL );
|
|
pBasePacket = baseppi->pOwnerPacket;
|
|
SAFEASSERT( pBasePacket != NULL );
|
|
}
|
|
else
|
|
{
|
|
// This packet tracks its own buffers.
|
|
pBasePacket = pPacket;
|
|
baseppi = ppi;
|
|
}
|
|
|
|
// Contribute to the composite status of this packet
|
|
if( Status == NDIS_STATUS_SUCCESS )
|
|
{
|
|
baseppi->u.BasePacketInfo.CompositeStatus = NDIS_STATUS_SUCCESS;
|
|
}
|
|
|
|
{
|
|
UCHAR DstAddr[ETH_LENGTH_OF_ADDRESS];
|
|
UINT PacketSize;
|
|
PVOID pHeader = BrdgBufGetPacketHeader(pBasePacket);
|
|
NDIS_STATUS PacketStatus;
|
|
PACKET_DIRECTION PacketDirection;
|
|
|
|
// Pull out some information before we try to free the packet
|
|
if( pHeader != NULL )
|
|
{
|
|
ETH_COPY_NETWORK_ADDRESS( DstAddr, pHeader );
|
|
}
|
|
// pHeader can only == NULL under heavy system stress
|
|
|
|
PacketStatus = baseppi->u.BasePacketInfo.CompositeStatus;
|
|
PacketDirection = baseppi->Flags.OriginalDirection;
|
|
BrdgFwdValidatePacketDirection( PacketDirection );
|
|
PacketSize = BrdgBufTotalPacketSize(pBasePacket);
|
|
|
|
// Now deref the packet
|
|
if( BrdgFwdDerefBasePacket( pAdapt, pBasePacket, baseppi, PacketStatus ) )
|
|
{
|
|
// The base packet was freed. Now ILLEGAL to reference pHeader, baseppi or pBasepacket
|
|
|
|
if( PacketDirection == BrdgPacketOutbound )
|
|
{
|
|
// This was a local-source packet.
|
|
if( PacketStatus == NDIS_STATUS_SUCCESS )
|
|
{
|
|
if( pHeader != NULL )
|
|
{
|
|
BrdgFwdCountTransmittedPacket( pAdapt, DstAddr, PacketSize );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ExInterlockedAddLargeStatistic( &gStatTransmittedErrorFrames, 1L );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// This was a relayed packet.
|
|
ExInterlockedAddLargeStatistic( &pAdapt->SentFrames, 1L );
|
|
ExInterlockedAddLargeStatistic( &pAdapt->SentBytes, PacketSize );
|
|
}
|
|
}
|
|
}
|
|
|
|
if( pBasePacket != pPacket )
|
|
{
|
|
// Owned copy packets are always base packets, so this should be a no-copy packet.
|
|
SAFEASSERT( Own == BrdgOwnWrapperPacket );
|
|
BrdgFwdFreeWrapperPacket( pPacket, ppi, pAdapt );
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
VOID
|
|
BrdgFwdSendComplete(
|
|
IN NDIS_HANDLE ProtocolBindingContext,
|
|
IN PNDIS_PACKET pPacket,
|
|
IN NDIS_STATUS Status
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
NDIS entry point called when a packet transmission has completed
|
|
|
|
Arguments:
|
|
|
|
ProtocolBindingContext The adapter on which the packet was send
|
|
pPacket The transmitted packet
|
|
Status The status of the send
|
|
|
|
Return Value:
|
|
|
|
None
|
|
|
|
--*/
|
|
{
|
|
PADAPT pAdapt = (PADAPT)ProtocolBindingContext;
|
|
|
|
SAFEASSERT( pAdapt != NULL );
|
|
|
|
if (pAdapt)
|
|
{
|
|
if( Status != NDIS_STATUS_SUCCESS )
|
|
{
|
|
THROTTLED_DBGPRINT(FWD, ("Packet send failed with %08x\n", Status));
|
|
}
|
|
|
|
BrdgFwdCleanupPacket(pAdapt, pPacket, Status);
|
|
|
|
BrdgDecrementWaitRef(&pAdapt->Refcount);
|
|
}
|
|
}
|
|
|
|
|
|
VOID
|
|
BrdgFwdReturnIndicatedPacket(
|
|
IN NDIS_HANDLE MiniportAdapterContext,
|
|
IN PNDIS_PACKET pPacket
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
NDIS entry point called when a packet indication has completed
|
|
|
|
Arguments:
|
|
|
|
MiniportAdapterContext Ignored
|
|
pPacket The transmitted packet
|
|
|
|
Return Value:
|
|
|
|
None
|
|
|
|
--*/
|
|
{
|
|
PACKET_OWNERSHIP Own;
|
|
|
|
// Find out whether we own this packet
|
|
Own = BrdgBufGetPacketOwnership(pPacket);
|
|
|
|
if( Own == BrdgNotOwned )
|
|
{
|
|
// This packet must have been a fast-track receive. Return it to
|
|
// its lower-layer owner.
|
|
BOOLEAN bRemaining;
|
|
PNDIS_PACKET_STACK pStack = NdisIMGetCurrentPacketStack(pPacket, &bRemaining);
|
|
PADAPT pOwnerAdapt;
|
|
|
|
// If we fast-tracked this packet, it MUST have had room for us to stash our
|
|
// pointer to the owning adapter
|
|
SAFEASSERT( pStack != NULL );
|
|
SAFEASSERT( bRemaining );
|
|
|
|
if (pStack)
|
|
{
|
|
// We incremented the owning adapter's refcount when we first received the packet
|
|
pOwnerAdapt = (PADAPT)pStack->IMReserved[0];
|
|
SAFEASSERT( pOwnerAdapt != NULL );
|
|
|
|
// Here you go
|
|
NdisReturnPackets( &pPacket, 1 );
|
|
|
|
// Release the owning NIC after the packet release
|
|
BrdgReleaseAdapter( pOwnerAdapt );
|
|
}
|
|
else
|
|
{
|
|
// if pStack is NULL, then we just return the packet as we can't determine the owning adapter.
|
|
|
|
// Here you go
|
|
NdisReturnPackets( &pPacket, 1 );
|
|
}
|
|
// Illegal to refer to pPacket now
|
|
pPacket = NULL;
|
|
}
|
|
else
|
|
{
|
|
// Recover our packet info block from our reserved area in the packet header
|
|
PPACKET_INFO ppi = *((PPACKET_INFO*)pPacket->MiniportReserved);
|
|
|
|
// Indications are always made with the base packet
|
|
SAFEASSERT( ppi->Flags.bIsBasePacket );
|
|
|
|
// Let go of the base packet
|
|
BrdgFwdDerefBasePacket( LOCAL_MINIPORT, pPacket, ppi, ppi->u.BasePacketInfo.CompositeStatus );
|
|
}
|
|
}
|
|
|
|
// ===========================================================================
|
|
//
|
|
// PRIVATE FUNCTIONS
|
|
//
|
|
// ===========================================================================
|
|
|
|
BOOLEAN
|
|
BrdgFwdServiceQueue(
|
|
IN PADAPT pAdapt
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Services the inbound packet queue of a particular adapter
|
|
|
|
This routine raises IRQL to DISPATCH to service the queue. It will
|
|
service up to MAX_PACKETS_AT_DPC packets at DISPATCH and then
|
|
return, even if the adapter's queue has not been drained.
|
|
|
|
The bServiceInProgress flag is cleared if this routine manages to
|
|
drain the adapter's queue. If the queue is non-empty when the
|
|
routine exits, the bServiceInProgress flag is left set.
|
|
|
|
Arguments:
|
|
|
|
pAdapt The adapter to service
|
|
|
|
Return Value:
|
|
|
|
TRUE == the adapter's queue was drained FALSE == there are still queued
|
|
packets to be serviced in the adapter's queue.
|
|
|
|
--*/
|
|
{
|
|
PPACKET_Q_INFO pqi;
|
|
NDIS_HANDLE MiniportHandle = NULL;
|
|
KIRQL oldIrql;
|
|
ULONG HandledPackets = 0L;
|
|
BOOLEAN bQueueWasEmptied;
|
|
|
|
SAFEASSERT( pAdapt != NULL );
|
|
|
|
KeRaiseIrql( DISPATCH_LEVEL, &oldIrql );
|
|
|
|
// We should only be scheduled when there's something to deal with
|
|
SAFEASSERT( BrdgQuerySingleListLength(&pAdapt->Queue) > 0 );
|
|
SAFEASSERT( pAdapt->bServiceInProgress );
|
|
|
|
// Get a handle on the miniport for the entire function duration
|
|
MiniportHandle = BrdgMiniAcquireMiniportForIndicate();
|
|
|
|
//
|
|
// The queue lock protects bServiceInProgress as well. Use it to dequeue
|
|
// packets and update the flag atomically.
|
|
//
|
|
NdisDprAcquireSpinLock( &pAdapt->QueueLock);
|
|
|
|
pqi = (PPACKET_Q_INFO)BrdgRemoveHeadSingleList(&pAdapt->Queue);
|
|
|
|
while( pqi != NULL )
|
|
{
|
|
PNDIS_PACKET pPacket;
|
|
PADAPT TargetAdapt = NULL, OriginalAdapt = NULL;
|
|
|
|
//
|
|
// QueueRefcount reflects the number of elements in the processing queue
|
|
// so people can block on it becoming empty
|
|
//
|
|
BrdgDecrementWaitRef( &pAdapt->QueueRefcount );
|
|
SAFEASSERT( (ULONG)pAdapt->QueueRefcount.Refcount == pAdapt->Queue.Length );
|
|
|
|
NdisDprReleaseSpinLock( &pAdapt->QueueLock );
|
|
|
|
// Demultiplex the union
|
|
if( pqi->Flags.bFastTrackReceive )
|
|
{
|
|
OriginalAdapt = pqi->u.pOriginalAdapt;
|
|
}
|
|
else
|
|
{
|
|
TargetAdapt = pqi->u.pTargetAdapt;
|
|
}
|
|
|
|
// Recover the packet pointer from the ProtocolReserved offset
|
|
pPacket = CONTAINING_RECORD(pqi, NDIS_PACKET, ProtocolReserved);
|
|
|
|
// Deal with this packet
|
|
if( pqi->pInfo != NULL )
|
|
{
|
|
if( pqi->Flags.bIsSTAPacket )
|
|
{
|
|
if( ! gDisableSTA && BrdgFwdBridgingNetworks() )
|
|
{
|
|
// Hand this packet off to the STA code
|
|
BrdgSTAReceivePacket( pAdapt, pPacket );
|
|
}
|
|
|
|
// We're done with this packet
|
|
BrdgFwdReleaseBasePacket( pPacket, pqi->pInfo, BrdgBufGetPacketOwnership(pPacket),
|
|
NDIS_STATUS_SUCCESS );
|
|
|
|
// It is an error to use any of these variables now
|
|
pPacket = NULL;
|
|
pqi = NULL;
|
|
}
|
|
else
|
|
{
|
|
BOOLEAN bShouldIndicate = pqi->Flags.bShouldIndicate,
|
|
bIsUnicastToBridge = pqi->Flags.bIsUnicastToBridge,
|
|
bRequiresCompatWork = pqi->Flags.bRequiresCompatWork,
|
|
bCompatOnly;
|
|
NDIS_STATUS Status;
|
|
PPACKET_INFO ppi = pqi->pInfo;
|
|
BOOLEAN bRetained = FALSE;
|
|
|
|
//
|
|
// This is an already-wrapped packet from the copy path.
|
|
//
|
|
SAFEASSERT( ! pqi->Flags.bFastTrackReceive );
|
|
|
|
// Before passing this packet along for processing, we must put a pointer to the packet's
|
|
// info block back into its MiniportReserved and ProtocolReserved areas so completion
|
|
// routines can recover the info block.
|
|
//
|
|
SAFEASSERT( ppi->pOwnerPacket == pPacket );
|
|
*((PPACKET_INFO*)pPacket->ProtocolReserved) = ppi;
|
|
*((PPACKET_INFO*)pPacket->MiniportReserved) = ppi;
|
|
|
|
// It is an error to use pqi anymore since it points into the ProtocolReserved area
|
|
pqi = NULL;
|
|
|
|
// If this packet arrived on a compatibility adapter or is bound for a
|
|
// compatibility adapter, only compatibility-mode work is required.
|
|
bCompatOnly = (BOOLEAN)((pAdapt->bCompatibilityMode) ||
|
|
((TargetAdapt != NULL) && (TargetAdapt->bCompatibilityMode)));
|
|
|
|
// Do compatibility work first if required
|
|
if( bRequiresCompatWork )
|
|
{
|
|
bRetained = BrdgCompProcessInboundPacket( pPacket, pAdapt, bCompatOnly );
|
|
Status = NDIS_STATUS_SUCCESS;
|
|
}
|
|
else
|
|
{
|
|
// Packet shouldn't have gotten here if there's nothing to do with it
|
|
SAFEASSERT( ! bCompatOnly );
|
|
bRetained = FALSE;
|
|
Status = NDIS_STATUS_SUCCESS;
|
|
}
|
|
|
|
if( ! bCompatOnly )
|
|
{
|
|
// We told the compatibility module not to retain the packet
|
|
SAFEASSERT( ! bRetained );
|
|
|
|
if( bIsUnicastToBridge )
|
|
{
|
|
SAFEASSERT( TargetAdapt == NULL );
|
|
bRetained = FALSE;
|
|
Status = NDIS_STATUS_FAILURE;
|
|
|
|
if( MiniportHandle != NULL )
|
|
{
|
|
if( BrdgBufAssignBasePacketQuota(pPacket, LOCAL_MINIPORT) )
|
|
{
|
|
// Do fixups usually done in BrdgFwdHandlePacket
|
|
ppi->u.BasePacketInfo.RefCount = 1L;
|
|
ppi->u.BasePacketInfo.CompositeStatus = NDIS_STATUS_FAILURE;
|
|
|
|
// Indicate the packet up
|
|
BrdgFwdIndicatePacket( pPacket, MiniportHandle );
|
|
bRetained = TRUE;
|
|
}
|
|
else
|
|
{
|
|
THROTTLED_DBGPRINT(FWD, ("Local miniport over quota on queued receive!\n"));
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if ((NULL == TargetAdapt) && pAdapt->bCompatibilityMode)
|
|
{
|
|
TargetAdapt = BrdgCompFindTargetAdapterForIPAddress(pPacket);
|
|
if (TargetAdapt && !BrdgAcquireAdapter(TargetAdapt))
|
|
{
|
|
TargetAdapt = NULL;
|
|
}
|
|
}
|
|
|
|
// Hand off this packet for general processing
|
|
Status = BrdgFwdHandlePacket( BrdgPacketInbound, TargetAdapt, pAdapt, bShouldIndicate,
|
|
MiniportHandle, pPacket, ppi, NULL, NULL, NULL, 0, 0 );
|
|
|
|
if( Status == NDIS_STATUS_PENDING )
|
|
{
|
|
bRetained = TRUE;
|
|
}
|
|
else
|
|
{
|
|
// The base packet we previously created was not actually used by BrdgFwdHandlePacket.
|
|
bRetained = FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
// If our processing did not retain the packet for later release, release it now.
|
|
if( ! bRetained )
|
|
{
|
|
BrdgFwdReleaseBasePacket( pPacket, ppi, BrdgBufGetPacketOwnership(pPacket), Status );
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// Can't have unwrapped STA packets
|
|
SAFEASSERT( ! pqi->Flags.bIsSTAPacket );
|
|
|
|
// Can't have unwrapped packets for compatibility processing
|
|
SAFEASSERT( ! pqi->Flags.bRequiresCompatWork );
|
|
|
|
// Packet should not be here (unwrapped) if it arrived from a compatibility-mode
|
|
// adapter.
|
|
SAFEASSERT( ! pAdapt->bCompatibilityMode );
|
|
|
|
// BrdgFwdReceivePacket should copy unicast packets that can't be fast-tracked
|
|
// into base packets before queuing them; we shouldn't end up with unwrapped
|
|
// packets that are unicast to the bridge but aren't tagged for fast-tracking.
|
|
if( pqi->Flags.bIsUnicastToBridge )
|
|
{
|
|
SAFEASSERT( pqi->Flags.bFastTrackReceive );
|
|
}
|
|
|
|
if( pqi->Flags.bFastTrackReceive )
|
|
{
|
|
BOOLEAN bRetained = FALSE;
|
|
|
|
SAFEASSERT( pqi->Flags.bIsUnicastToBridge );
|
|
|
|
if( MiniportHandle != NULL )
|
|
{
|
|
PUCHAR DstAddr = BrdgBufGetPacketHeader(pPacket);
|
|
|
|
if( DstAddr != NULL )
|
|
{
|
|
// This is unicast to the bridge only; we are asked to try to fast-track it straight up to
|
|
// overlying protocols.
|
|
if( BrdgFwdNoCopyFastTrackReceive(pPacket, OriginalAdapt, MiniportHandle, DstAddr, &bRetained ) )
|
|
{
|
|
// We had better be able to retain ownership of the original packet because we've already
|
|
// hung on to it past the return of FwdReceivePacket!
|
|
SAFEASSERT( bRetained );
|
|
}
|
|
else
|
|
{
|
|
// BrdgFwdReceivePacket is supposed to make sure packets can be fast-tracked
|
|
// before queuing them up
|
|
SAFEASSERT( FALSE );
|
|
}
|
|
}
|
|
// DstAddr can only == NULL under heavy system stress
|
|
}
|
|
|
|
if( !bRetained )
|
|
{
|
|
// Error of some sort or the miniport isn't available for indications. Ditch the packet.
|
|
NdisReturnPackets( &pPacket, 1 );
|
|
|
|
// Illegal to refer to the packet now
|
|
pPacket = NULL;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
NDIS_STATUS Status;
|
|
|
|
// Packet should not be here (unwrapped) if it is bound for a compatibility-mode adapter.
|
|
SAFEASSERT( ! TargetAdapt->bCompatibilityMode );
|
|
|
|
// This is not a packet unicast to the bridge. Do the more general processing.
|
|
Status = BrdgFwdHandlePacket( BrdgPacketInbound, TargetAdapt, pAdapt, pqi->Flags.bShouldIndicate,
|
|
MiniportHandle, NULL, NULL, BrdgFwdMakeNoCopyBasePacket, pPacket, pAdapt, 0, 0 );
|
|
|
|
if( Status != NDIS_STATUS_PENDING )
|
|
{
|
|
// The unwrapped packet from the underlying NIC was not used. Release it now.
|
|
NdisReturnPackets( &pPacket, 1 );
|
|
|
|
// Illegal to refer to the packet now
|
|
pPacket = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Release the target adapter if there was one
|
|
if( TargetAdapt )
|
|
{
|
|
BrdgReleaseAdapter( TargetAdapt );
|
|
}
|
|
|
|
// Acquire the spin lock before either exiting or grabbing the next packet
|
|
NdisDprAcquireSpinLock( &pAdapt->QueueLock );
|
|
|
|
// If we've processed too many packets, bail out even if the queue is not empty
|
|
HandledPackets++;
|
|
|
|
if( HandledPackets >= MAX_PACKETS_AT_DPC )
|
|
{
|
|
break;
|
|
}
|
|
|
|
// Get the next packet off the queue
|
|
pqi = (PPACKET_Q_INFO)BrdgRemoveHeadSingleList(&pAdapt->Queue);
|
|
}
|
|
|
|
//
|
|
// Clear bServiceInProgress only if we emptied the queue. Otherwise, leave it set to
|
|
// prevent spurious signalling of the QueueEvent, which would cause more than one
|
|
// draining thread to service the same queue!
|
|
//
|
|
if( BrdgQuerySingleListLength(&pAdapt->Queue) == 0L )
|
|
{
|
|
bQueueWasEmptied = TRUE;
|
|
pAdapt->bServiceInProgress = FALSE;
|
|
}
|
|
else
|
|
{
|
|
bQueueWasEmptied = FALSE;
|
|
}
|
|
|
|
NdisDprReleaseSpinLock( &pAdapt->QueueLock );
|
|
|
|
// Let go of the miniport until next time
|
|
if( MiniportHandle != NULL )
|
|
{
|
|
BrdgMiniReleaseMiniportForIndicate();
|
|
}
|
|
|
|
KeLowerIrql(oldIrql);
|
|
|
|
return bQueueWasEmptied;
|
|
}
|
|
|
|
VOID
|
|
BrdgFwdProcessQueuedPackets(
|
|
IN PVOID Param1
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Per-adapter inbound packet queue draining function
|
|
|
|
There is one instance of this function running per processor.
|
|
This routine sleeps until there is work to be done, and then calls
|
|
BrdgFwdServiceQueue to service whichever adapter needs attention.
|
|
It does this by blocking against the QueueEvent object for each
|
|
adapter's queue, as well as the global gKillThreads and the
|
|
gThreadsCheckAdapters event for this processor.
|
|
|
|
When the block returns, there is an event needing attention; it
|
|
may be the fact that the thread has been signaled to exit, that
|
|
this thread is supposed to re-enumerate adapters, or that an
|
|
adapter needs its inbound queue serviced.
|
|
|
|
This routine increments the refcount of every adapter that it
|
|
sleeps against; the gThreadsCheckAdapters event causes the thread
|
|
to re-examine the adapter list and release its refcount on any
|
|
adapters that were removed (or notice new additions).
|
|
|
|
Must be called at < DISPATCH_LEVEL since we wait on an event
|
|
|
|
Arguments:
|
|
|
|
Param1 The processor on which we should execute
|
|
(is not necessarily the processor on which
|
|
we are first scheduled)
|
|
|
|
Return Value:
|
|
|
|
None
|
|
|
|
--*/
|
|
{
|
|
// Double cast to tell the IA64 compiler we really mean to truncate
|
|
UINT Processor = (UINT)(ULONG_PTR)Param1;
|
|
PVOID WaitObjects[MAXIMUM_WAIT_OBJECTS];
|
|
KWAIT_BLOCK WaitBlocks[MAXIMUM_WAIT_OBJECTS];
|
|
ULONG numWaitObjects;
|
|
BOOLEAN bDie = FALSE;
|
|
PVOID pThread = KeGetCurrentThread();
|
|
|
|
// Constants
|
|
const ULONG KILL_EVENT = 0L, CHECK_EVENT = 1L;
|
|
|
|
DBGPRINT(FWD, ("Spinning up a thread on processor %i\n", Processor));
|
|
|
|
// Elevate our priority
|
|
KeSetPriorityThread(pThread, LOW_REALTIME_PRIORITY);
|
|
|
|
// Attach ourselves to our designated processor
|
|
KeSetAffinityThread(pThread, (KAFFINITY)(1<<Processor));
|
|
|
|
// Start off waiting against just the kill event and the re-enumerate event.
|
|
WaitObjects[KILL_EVENT] = &gKillThreads;
|
|
WaitObjects[CHECK_EVENT] = &gThreadsCheckAdapters[Processor];
|
|
numWaitObjects = 2L;
|
|
|
|
while( ! bDie )
|
|
{
|
|
NTSTATUS Status;
|
|
ULONG firedObject;
|
|
|
|
//
|
|
// Block until we are told to exit, re-enumerate, or until a processor's
|
|
// queue signals that it needs servicing.
|
|
//
|
|
SAFEASSERT(CURRENT_IRQL < DISPATCH_LEVEL);
|
|
Status = KeWaitForMultipleObjects( numWaitObjects, WaitObjects, WaitAny, Executive,
|
|
KernelMode, FALSE, NULL, WaitBlocks );
|
|
|
|
if( ! NT_SUCCESS(Status) )
|
|
{
|
|
// This really shouldn't happen
|
|
DBGPRINT(FWD, ("KeWaitForMultipleObjects failed! %08x\n", Status));
|
|
SAFEASSERT(FALSE);
|
|
|
|
// Pretend this was a signal to exit
|
|
firedObject = KILL_EVENT;
|
|
}
|
|
else
|
|
{
|
|
firedObject = (ULONG)Status - (ULONG)STATUS_WAIT_0;
|
|
}
|
|
|
|
if( firedObject == KILL_EVENT )
|
|
{
|
|
// We are asked to exit.
|
|
DBGPRINT(FWD, ("Exiting queue servicing thread on processor %i\n", Processor));
|
|
bDie = TRUE;
|
|
}
|
|
else if( firedObject == CHECK_EVENT )
|
|
{
|
|
LOCK_STATE LockState;
|
|
UINT i;
|
|
PADAPT pAdapt;
|
|
|
|
DBGPRINT(FWD, ("Re-enumerating adapters on processor %i\n", Processor));
|
|
|
|
// We must re-enumerate the list of adapters. First decrement the refcount on any
|
|
// adapters we're already holding
|
|
for( i = 2; i < numWaitObjects; i++ )
|
|
{
|
|
pAdapt = CONTAINING_RECORD( WaitObjects[i], ADAPT, QueueEvent );
|
|
BrdgReleaseAdapter( pAdapt );
|
|
}
|
|
|
|
numWaitObjects = 2;
|
|
|
|
// Now walk the adapter list and retrieve a pointer to each one's queue event.
|
|
NdisAcquireReadWriteLock( &gAdapterListLock, FALSE/*Read only*/, &LockState );
|
|
|
|
for( pAdapt = gAdapterList; pAdapt != NULL; pAdapt = pAdapt->Next )
|
|
{
|
|
// We will be using this adapter outside the list lock
|
|
BrdgAcquireAdapterInLock(pAdapt);
|
|
WaitObjects[numWaitObjects] = &pAdapt->QueueEvent;
|
|
numWaitObjects++;
|
|
}
|
|
|
|
NdisReleaseReadWriteLock( &gAdapterListLock, &LockState );
|
|
}
|
|
else
|
|
{
|
|
// An adapter needs queue servicing.
|
|
PADAPT pAdapt = CONTAINING_RECORD( WaitObjects[firedObject], ADAPT, QueueEvent );
|
|
|
|
if( ! BrdgFwdServiceQueue( pAdapt ) )
|
|
{
|
|
// The adapter's queue was serviced but not emptied. Signal the queue event so
|
|
// someone (maybe us!) will be scheduled to service the queue
|
|
KeSetEvent( &pAdapt->QueueEvent, EVENT_INCREMENT, FALSE );
|
|
}
|
|
}
|
|
}
|
|
|
|
// Shoot ourselves in the head
|
|
PsTerminateSystemThread( STATUS_SUCCESS );
|
|
}
|
|
|
|
PNDIS_PACKET
|
|
BrdgFwdMakeSendBasePacket(
|
|
OUT PPACKET_INFO *pppi,
|
|
IN PADAPT Target,
|
|
IN PVOID Param1,
|
|
IN PVOID Param2,
|
|
IN UINT Param3,
|
|
IN UINT Param4
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Passed as a parameter to BrdgFwdHandlePacket and called back as necessary
|
|
|
|
Builds a base packet from a packet outbound from overlying protocols
|
|
|
|
Arguments:
|
|
|
|
pppi The info block of the new base packet or NULL if the
|
|
allocation failed
|
|
|
|
Target The adapter to "charge" the new base packet to
|
|
Param1 The outbound packet
|
|
Param2 - Param4 Unused
|
|
|
|
Return Value:
|
|
|
|
The new base packet or NULL if the allocation failed (usually because the
|
|
target adapter didn't pass quota)
|
|
|
|
--*/
|
|
{
|
|
PNDIS_PACKET pPacket = (PNDIS_PACKET)Param1;
|
|
PNDIS_PACKET pNewPacket;
|
|
|
|
SAFEASSERT( pPacket != NULL );
|
|
|
|
// Get a wrapper packet to be the base packet
|
|
pNewPacket = BrdgFwdAllocAndWrapPacketForSend( pPacket, pppi, Target );
|
|
|
|
if( pNewPacket == NULL )
|
|
{
|
|
// We didn't pass quota for this target
|
|
return NULL;
|
|
}
|
|
|
|
// Stuff a pointer to the packet's info block into both the ProtocolReserved
|
|
// and the MiniportReserved areas so we can recover the info block no matter
|
|
// how we plan to use this packet
|
|
*((PPACKET_INFO*)pNewPacket->ProtocolReserved) = *pppi;
|
|
*((PPACKET_INFO*)pNewPacket->MiniportReserved) = *pppi;
|
|
|
|
SAFEASSERT( *pppi != NULL );
|
|
(*pppi)->u.BasePacketInfo.pOriginalPacket = pPacket;
|
|
(*pppi)->u.BasePacketInfo.pOwnerAdapter = NULL;
|
|
(*pppi)->Flags.OriginalDirection = BrdgPacketOutbound;
|
|
(*pppi)->Flags.bIsBasePacket = TRUE;
|
|
|
|
// Signal that the underlying NIC can hang on to the buffers
|
|
NDIS_SET_PACKET_STATUS( pNewPacket, NDIS_STATUS_SUCCESS );
|
|
|
|
return pNewPacket;
|
|
}
|
|
|
|
PNDIS_PACKET
|
|
BrdgFwdMakeNoCopyBasePacket(
|
|
OUT PPACKET_INFO *pppi,
|
|
IN PADAPT Target,
|
|
IN PVOID Param1,
|
|
IN PVOID Param2,
|
|
IN UINT Param3,
|
|
IN UINT Param4
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Passed as a parameter to BrdgFwdHandlePacket and called back as necessary
|
|
|
|
Builds a new base packet from a packet received on the no-copy path
|
|
|
|
Arguments:
|
|
|
|
pppi The info block for the new packet or NULL if the alloc
|
|
failed
|
|
|
|
Target The adapter to "charge" the new packet to
|
|
Param1 The originally indicated packet descriptor
|
|
Param2 The adapter on which the packet was received
|
|
Param3, Param4 Unused
|
|
|
|
Return Value:
|
|
|
|
A new base packet or NULL if the allocation failed (usually because the
|
|
target adapter did not pass quota)
|
|
|
|
--*/
|
|
{
|
|
PNDIS_PACKET pPacket = (PNDIS_PACKET)Param1;
|
|
PADAPT pOwnerAdapt = (PADAPT)Param2;
|
|
PNDIS_PACKET NewPacket;
|
|
|
|
SAFEASSERT( pPacket != NULL );
|
|
SAFEASSERT( pOwnerAdapt != NULL );
|
|
|
|
// Get a new wrapper packet
|
|
NewPacket = BrdgFwdAllocAndWrapPacketForReceive( pPacket, pppi, Target );
|
|
|
|
if (NewPacket == NULL)
|
|
{
|
|
// We didn't pass quota for this target
|
|
return NULL;
|
|
}
|
|
|
|
SAFEASSERT( *pppi != NULL );
|
|
|
|
// Stuff a pointer to the packet's info block into both the ProtocolReserved
|
|
// and the MiniportReserved areas so we can recover the info block no matter
|
|
// how we plan to use this packet
|
|
*((PPACKET_INFO*)NewPacket->ProtocolReserved) = *pppi;
|
|
*((PPACKET_INFO*)NewPacket->MiniportReserved) = *pppi;
|
|
|
|
//
|
|
// We must ensure that the adapter we just got this packet from is not unbound until we are
|
|
// done with its packet. Bump the adapter's refcount here. The adapter's refcount will be
|
|
// decremented again when this base packet is freed.
|
|
//
|
|
BrdgReacquireAdapter( pOwnerAdapt );
|
|
(*pppi)->u.BasePacketInfo.pOwnerAdapter = pOwnerAdapt;
|
|
|
|
(*pppi)->u.BasePacketInfo.pOriginalPacket = pPacket;
|
|
(*pppi)->Flags.OriginalDirection = BrdgPacketInbound;
|
|
(*pppi)->Flags.bIsBasePacket = TRUE;
|
|
|
|
// Make sure the packet indicates that it's OK to hang on to buffers
|
|
NDIS_SET_PACKET_STATUS( NewPacket, NDIS_STATUS_SUCCESS );
|
|
|
|
// Count this packet as received
|
|
ExInterlockedAddLargeStatistic( &gStatReceivedFrames, 1L );
|
|
ExInterlockedAddLargeStatistic( &gStatReceivedBytes, BrdgBufTotalPacketSize(pPacket) );
|
|
ExInterlockedAddLargeStatistic( &gStatReceivedNoCopyFrames, 1L );
|
|
ExInterlockedAddLargeStatistic( &gStatReceivedNoCopyBytes, BrdgBufTotalPacketSize(pPacket) );
|
|
|
|
ExInterlockedAddLargeStatistic( &pOwnerAdapt->ReceivedFrames, 1L );
|
|
ExInterlockedAddLargeStatistic( &pOwnerAdapt->ReceivedBytes, BrdgBufTotalPacketSize(pPacket) );
|
|
|
|
return NewPacket;
|
|
}
|
|
|
|
PNDIS_PACKET
|
|
BrdgFwdMakeCopyBasePacket(
|
|
OUT PPACKET_INFO *pppi,
|
|
IN PVOID pHeader,
|
|
IN PVOID pData,
|
|
IN UINT HeaderSize,
|
|
IN UINT DataSize,
|
|
IN UINT SizeOfPacket,
|
|
IN BOOLEAN bCountAsReceived,
|
|
IN PADAPT pOwnerAdapt,
|
|
PVOID *ppBuf
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Builds a new copy packet to hold inbound data on the copy path or on the
|
|
no-copy path if a packet arrives with STATUS_RESOURCES.
|
|
|
|
The new packet has NO ATTRIBUTED QUOTA to any adapter. This is because
|
|
at the time of the initial receive, a target adapter is not yet known
|
|
and the inbound data must be wrapped in a copy packet to be queued for
|
|
processing.
|
|
|
|
The cost of the base packet is assigned to target adapters as it is
|
|
processed in the queue-draining thread.
|
|
|
|
Arguments:
|
|
|
|
pppi Output of the new info block associated with the
|
|
new packet (NULL if alloc failed)
|
|
|
|
pHeader Pointer to the header buffer originally indicated
|
|
Can be NULL to not copy the header
|
|
|
|
pData Pointer to the data buffer originally indicated
|
|
Can be NULL to not copy the data buffer
|
|
|
|
HeaderSize Size of the header buffer
|
|
DataSize Size of the data buffer
|
|
|
|
SizeOfPacket Size to set the packet's buffer to. Can be different
|
|
from HeaderSize+DataSize if the caller plans to
|
|
copy more data in later
|
|
|
|
bCountAsReceived Whether to count this packet as received
|
|
|
|
pOwnerAdapt Adapter this packet was received on (purely for
|
|
statistics purposes). Can be NULL if bCountAsReceived == FALSE
|
|
|
|
ppBuf (optionally) receives a pointer to the data buffer
|
|
of the freshly allocated packet
|
|
|
|
Return Value:
|
|
|
|
A new base packet or NULL if the allocation failed
|
|
|
|
--*/
|
|
{
|
|
PNDIS_PACKET NewPacket;
|
|
PNDIS_BUFFER pBuffer;
|
|
PVOID pvBuf;
|
|
UINT bufLength;
|
|
|
|
// Get a copy packet to carry the data
|
|
NewPacket = BrdgBufGetBaseCopyPacket( pppi );
|
|
|
|
if (NewPacket == NULL)
|
|
{
|
|
// Our copy packet pool is full!
|
|
return NULL;
|
|
}
|
|
|
|
SAFEASSERT( *pppi != NULL );
|
|
|
|
// Get a pointer to the preallocated buffer in this packet
|
|
pBuffer = BrdgBufPacketHeadBuffer(NewPacket);
|
|
SAFEASSERT( pBuffer != NULL );
|
|
NdisQueryBufferSafe( pBuffer, &pvBuf, &bufLength, NormalPagePriority );
|
|
|
|
if( pvBuf == NULL )
|
|
{
|
|
// This shouldn't be possible because the data buffer should have been
|
|
// alloced from kernel space
|
|
SAFEASSERT(FALSE);
|
|
BrdgBufFreeBaseCopyPacket( NewPacket, *pppi );
|
|
*pppi = NULL;
|
|
return NULL;
|
|
}
|
|
|
|
SAFEASSERT( bufLength == MAX_PACKET_SIZE );
|
|
|
|
if( ppBuf != NULL )
|
|
{
|
|
*ppBuf = pvBuf;
|
|
}
|
|
|
|
// Copy the packet data into our own preallocated buffers
|
|
if( pHeader != NULL )
|
|
{
|
|
NdisMoveMemory(pvBuf, pHeader, HeaderSize);
|
|
}
|
|
else
|
|
{
|
|
SAFEASSERT( HeaderSize == 0 );
|
|
}
|
|
|
|
if( pData != NULL )
|
|
{
|
|
NdisMoveMemory((PUCHAR)pvBuf + HeaderSize, pData, DataSize);
|
|
}
|
|
else
|
|
{
|
|
SAFEASSERT( DataSize == 0 );
|
|
}
|
|
|
|
// Tweak the size of the buffer so it looks like the right length
|
|
NdisAdjustBufferLength(pBuffer, SizeOfPacket);
|
|
|
|
(*pppi)->u.BasePacketInfo.pOriginalPacket = NULL;
|
|
(*pppi)->u.BasePacketInfo.pOwnerAdapter = NULL;
|
|
(*pppi)->Flags.OriginalDirection = BrdgPacketInbound;
|
|
(*pppi)->Flags.bIsBasePacket = TRUE;
|
|
|
|
// Make the header size correct
|
|
NDIS_SET_PACKET_HEADER_SIZE(NewPacket, ETHERNET_HEADER_SIZE);
|
|
|
|
// Indicate that upper-layer protocols can hang on to these buffers
|
|
NDIS_SET_PACKET_STATUS( NewPacket, NDIS_STATUS_SUCCESS );
|
|
|
|
// Count this packet as received
|
|
if( bCountAsReceived )
|
|
{
|
|
ExInterlockedAddLargeStatistic( &gStatReceivedFrames, 1L );
|
|
ExInterlockedAddLargeStatistic( &gStatReceivedBytes, SizeOfPacket );
|
|
ExInterlockedAddLargeStatistic( &gStatReceivedCopyFrames, 1L );
|
|
ExInterlockedAddLargeStatistic( &gStatReceivedCopyBytes, SizeOfPacket );
|
|
|
|
SAFEASSERT( pOwnerAdapt != NULL );
|
|
ExInterlockedAddLargeStatistic( &pOwnerAdapt->ReceivedFrames, 1L );
|
|
ExInterlockedAddLargeStatistic( &pOwnerAdapt->ReceivedBytes, SizeOfPacket );
|
|
}
|
|
|
|
return NewPacket;
|
|
}
|
|
|
|
VOID
|
|
BrdgFwdSendOnLink(
|
|
IN PADAPT pAdapt,
|
|
IN PNDIS_PACKET pPacket
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Sends a packet to a particular adapter
|
|
|
|
Arguments:
|
|
|
|
pAdapt The adapter to send to
|
|
pPacket The packet to send
|
|
|
|
Return Value:
|
|
|
|
None
|
|
|
|
--*/
|
|
{
|
|
PPACKET_INFO ppi;
|
|
PACKET_DIRECTION PacketDirection = BrdgPacketImpossible;
|
|
BOOLEAN Bridging = BrdgFwdBridgingNetworks();
|
|
BOOLEAN Incremented = FALSE;
|
|
|
|
// Make sure this doesn't loop back
|
|
NdisClearPacketFlags( pPacket, NDIS_FLAGS_LOOPBACK_ONLY );
|
|
NdisSetPacketFlags( pPacket, NDIS_FLAGS_DONT_LOOPBACK );
|
|
|
|
//
|
|
// Logic is like this:
|
|
// If the packet is an Outbound packet then we send it.
|
|
// If the packet has been created in the bridge, then we check
|
|
// the base packet to see if it is outbound, if it is then we send the packet.
|
|
//
|
|
|
|
if (!Bridging)
|
|
{
|
|
if (BrdgBufGetPacketOwnership(pPacket) != BrdgNotOwned)
|
|
{
|
|
ppi = *((PPACKET_INFO*)pPacket->MiniportReserved);
|
|
if (!ppi)
|
|
{
|
|
ppi = *((PPACKET_INFO*)pPacket->ProtocolReserved);
|
|
}
|
|
|
|
if (ppi)
|
|
{
|
|
if (((ppi->Flags.OriginalDirection == BrdgPacketOutbound) ||
|
|
((ppi->Flags.OriginalDirection == BrdgPacketCreatedInBridge) &&
|
|
(ppi->u.pBasePacketInfo != NULL &&
|
|
ppi->u.pBasePacketInfo->Flags.OriginalDirection == BrdgPacketOutbound)
|
|
)
|
|
)
|
|
)
|
|
{
|
|
PacketDirection = BrdgPacketOutbound;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// If it doesn't contain a ppi then it never came through the bridge, so it's being transmitted locally.
|
|
PacketDirection = BrdgPacketOutbound;
|
|
#if DBG
|
|
if (gBreakIfNullPPI)
|
|
{
|
|
KdBreakPoint();
|
|
}
|
|
#endif // DBG
|
|
}
|
|
}
|
|
else
|
|
{
|
|
PacketDirection = BrdgPacketOutbound;
|
|
}
|
|
}
|
|
|
|
Incremented = BrdgIncrementWaitRef(&pAdapt->Refcount);
|
|
|
|
if (Incremented &&
|
|
(PacketDirection == BrdgPacketOutbound || Bridging))
|
|
{
|
|
|
|
#if DBG
|
|
if (gPrintPacketTypes)
|
|
{
|
|
if (PacketDirection == BrdgPacketOutbound)
|
|
{
|
|
THROTTLED_DBGPRINT(FWD, ("Sending Outbound packet\r\n"));
|
|
}
|
|
else
|
|
{
|
|
THROTTLED_DBGPRINT(FWD, ("Forwarding packet\r\n"));
|
|
}
|
|
}
|
|
#endif // DBG
|
|
|
|
// Send!
|
|
NdisSendPackets( pAdapt->BindingHandle, &pPacket, 1 );
|
|
}
|
|
else
|
|
{
|
|
|
|
#if DBG
|
|
if (Bridging && gPrintPacketTypes)
|
|
{
|
|
THROTTLED_DBGPRINT(FWD, ("Not allowed to send packet\r\n"));
|
|
}
|
|
#endif // DBG
|
|
|
|
//
|
|
// We incremented this, but we're not going to be going through any path that
|
|
// decrements this, so we need to do this here.
|
|
//
|
|
if (Incremented)
|
|
{
|
|
BrdgDecrementWaitRef(&pAdapt->Refcount);
|
|
}
|
|
|
|
BrdgFwdCleanupPacket(pAdapt, pPacket, NDIS_STATUS_CLOSING);
|
|
}
|
|
}
|
|
|
|
VOID
|
|
BrdgFwdReleaseBasePacket(
|
|
IN PNDIS_PACKET pPacket,
|
|
PPACKET_INFO ppi,
|
|
IN PACKET_OWNERSHIP Own,
|
|
IN NDIS_STATUS Status
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Frees a base packet. Called when a base packet's refcount reaches zero.
|
|
|
|
Arguments:
|
|
|
|
pPacket The base packet to free
|
|
ppi The packet's info block
|
|
Own The result of a call to BrdgBufGetPacketOwnership(pPacket)
|
|
|
|
Status The status to be returned to the entity owning the
|
|
original packet wrapped by the base packet (if any)
|
|
|
|
Return Value:
|
|
|
|
None
|
|
|
|
--*/
|
|
{
|
|
SAFEASSERT( ppi->Flags.bIsBasePacket );
|
|
|
|
if( Own == BrdgOwnCopyPacket )
|
|
{
|
|
// This packet was allocated to wrap copied buffers. Free it back to our pool.
|
|
BrdgFwdValidatePacketDirection( ppi->Flags.OriginalDirection );
|
|
BrdgBufFreeBaseCopyPacket( pPacket, ppi );
|
|
}
|
|
else
|
|
{
|
|
// This packet was allocated to wrap a protocol or miniport's buffers.
|
|
// Return the packet to its original owner.
|
|
SAFEASSERT( Own == BrdgOwnWrapperPacket );
|
|
SAFEASSERT( ppi->u.BasePacketInfo.pOriginalPacket != NULL );
|
|
|
|
if( ppi->Flags.OriginalDirection == BrdgPacketInbound )
|
|
{
|
|
// Wraps a lower-layer miniport packet.
|
|
NdisReturnPackets( &ppi->u.BasePacketInfo.pOriginalPacket, 1 );
|
|
|
|
// We incremented the adapter's refcount when we first received the packet
|
|
// to prevent the adapter from shutting down while we still held some of
|
|
// its packets
|
|
SAFEASSERT( ppi->u.BasePacketInfo.pOwnerAdapter != NULL );
|
|
BrdgReleaseAdapter( ppi->u.BasePacketInfo.pOwnerAdapter );
|
|
}
|
|
else
|
|
{
|
|
NDIS_HANDLE MiniportHandle;
|
|
|
|
// Wraps a higher-layer protocol packet
|
|
SAFEASSERT( ppi->Flags.OriginalDirection == BrdgPacketOutbound );
|
|
|
|
// Shuttle back per-packet information before returning the original descriptor
|
|
NdisIMCopySendCompletePerPacketInfo (ppi->u.BasePacketInfo.pOriginalPacket, pPacket);
|
|
|
|
// Give back the original descriptor.
|
|
// NDIS should prevent the miniport from shutting down while there is still an
|
|
// indicate pending.
|
|
MiniportHandle = BrdgMiniAcquireMiniport();
|
|
SAFEASSERT( MiniportHandle != NULL );
|
|
if (MiniportHandle)
|
|
{
|
|
NdisMSendComplete( MiniportHandle, ppi->u.BasePacketInfo.pOriginalPacket, Status );
|
|
BrdgMiniReleaseMiniport();
|
|
}
|
|
}
|
|
|
|
// Don't forget to free the wrapper packet as well
|
|
BrdgFwdFreeBaseWrapperPacket( pPacket, ppi );
|
|
}
|
|
}
|
|
|
|
VOID
|
|
BrdgFwdWrapPacketForReceive(
|
|
IN PNDIS_PACKET pOriginalPacket,
|
|
IN PNDIS_PACKET pNewPacket
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Copies state information into a wrapper packet for the purposes of indicating
|
|
the new packet up to overlying protocols
|
|
|
|
Arguments:
|
|
|
|
pOriginalPacket The packet to copy state out of
|
|
pNewPacket The wrapper packet to copy state into
|
|
|
|
Return Value:
|
|
|
|
None
|
|
|
|
--*/
|
|
{
|
|
NDIS_STATUS Status;
|
|
|
|
// Copy other header and OOB data
|
|
NDIS_SET_ORIGINAL_PACKET(pNewPacket, NDIS_GET_ORIGINAL_PACKET(pOriginalPacket));
|
|
NdisSetPacketFlags( pNewPacket, NdisGetPacketFlags(pOriginalPacket) );
|
|
Status = NDIS_GET_PACKET_STATUS(pOriginalPacket);
|
|
NDIS_SET_PACKET_STATUS(pNewPacket, Status);
|
|
NDIS_SET_PACKET_HEADER_SIZE(pNewPacket, NDIS_GET_PACKET_HEADER_SIZE(pOriginalPacket));
|
|
}
|
|
|
|
VOID
|
|
BrdgFwdWrapPacketForSend(
|
|
IN PNDIS_PACKET pOriginalPacket,
|
|
IN PNDIS_PACKET pNewPacket
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Copies state information into a wrapper packet for the purposes of transmitting the
|
|
new packet to underlying NICs
|
|
|
|
Arguments:
|
|
|
|
pOriginalPacket The packet to copy state out of
|
|
pNewPacket The wrapper packet to copy state into
|
|
|
|
Return Value:
|
|
|
|
None
|
|
|
|
--*/
|
|
{
|
|
PVOID MediaSpecificInfo = NULL;
|
|
ULONG MediaSpecificInfoSize = 0;
|
|
|
|
NdisSetPacketFlags( pNewPacket, NdisGetPacketFlags(pOriginalPacket) );
|
|
|
|
//
|
|
// Copy the OOB Offset from the original packet to the new
|
|
// packet.
|
|
//
|
|
NdisMoveMemory(NDIS_OOB_DATA_FROM_PACKET(pNewPacket),
|
|
NDIS_OOB_DATA_FROM_PACKET(pOriginalPacket),
|
|
sizeof(NDIS_PACKET_OOB_DATA));
|
|
|
|
//
|
|
// Copy the per packet info into the new packet
|
|
// This includes ClassificationHandle, etc.
|
|
// Make sure other stuff is not copied !!!
|
|
//
|
|
NdisIMCopySendPerPacketInfo(pNewPacket, pOriginalPacket);
|
|
|
|
//
|
|
// Copy the Media specific information
|
|
//
|
|
NDIS_GET_PACKET_MEDIA_SPECIFIC_INFO(pOriginalPacket,
|
|
&MediaSpecificInfo,
|
|
&MediaSpecificInfoSize);
|
|
|
|
if (MediaSpecificInfo || MediaSpecificInfoSize)
|
|
{
|
|
NDIS_SET_PACKET_MEDIA_SPECIFIC_INFO(pNewPacket,
|
|
MediaSpecificInfo,
|
|
MediaSpecificInfoSize);
|
|
}
|
|
}
|
|
|
|
PNDIS_PACKET
|
|
BrdgFwdCommonAllocAndWrapPacket(
|
|
IN PNDIS_PACKET pBasePacket,
|
|
OUT PPACKET_INFO *pppi,
|
|
IN PADAPT pTargetAdapt,
|
|
IN PWRAPPER_FUNC pFunc
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Common logic for creating a wrapper packet
|
|
|
|
Creates a new wrapper packet and calls the supplied function to copy
|
|
state information from the original packet into the wrapper
|
|
|
|
Arguments:
|
|
|
|
pBasePacket The packet to wrap
|
|
pppi Returns the new wrapper packet's info block or
|
|
NULL if the allocation fails
|
|
|
|
pTargetAdapt The adapter to charge the new wrapper packet (and
|
|
the cost of hanging onto the base packet) to
|
|
|
|
pFunc The function to call to copy state from the original
|
|
packet to the new wrapper
|
|
|
|
Return Value:
|
|
|
|
The newly allocated wrapper packet or NULL if the allocation failed (usually
|
|
because the target adapter did not pass quota)
|
|
|
|
--*/
|
|
{
|
|
PNDIS_PACKET pNewPacket;
|
|
NDIS_STATUS Status;
|
|
|
|
SAFEASSERT( pTargetAdapt != NULL );
|
|
|
|
// Must first determine if the target can handle the quota of
|
|
// holding onto the base packet.
|
|
//
|
|
// If we do not own the base packet, this has no effect.
|
|
if( ! BrdgBufAssignBasePacketQuota(pBasePacket, pTargetAdapt) )
|
|
{
|
|
*pppi = NULL;
|
|
return NULL;
|
|
}
|
|
|
|
// Try to get a wrapper packet
|
|
pNewPacket = BrdgBufGetWrapperPacket( pppi, pTargetAdapt );
|
|
|
|
if( pNewPacket == NULL )
|
|
{
|
|
SAFEASSERT( *pppi == NULL );
|
|
|
|
// Reverse the previous accounting for holding onto the base packet
|
|
BrdgBufReleaseBasePacketQuota( pBasePacket, pTargetAdapt );
|
|
return NULL;
|
|
}
|
|
|
|
SAFEASSERT( *pppi != NULL );
|
|
|
|
// Point the new packet to the old buffers
|
|
Status = BrdgBufChainCopyBuffers( pNewPacket, pBasePacket );
|
|
|
|
if( Status != NDIS_STATUS_SUCCESS )
|
|
{
|
|
BrdgBufReleaseBasePacketQuota( pBasePacket, pTargetAdapt );
|
|
BrdgBufFreeWrapperPacket( pNewPacket, *pppi, pTargetAdapt );
|
|
*pppi = NULL;
|
|
return NULL;
|
|
}
|
|
|
|
// Stuff a pointer to the packet's info block into both the ProtocolReserved
|
|
// and the MiniportReserved areas so we can recover the info block no matter
|
|
// how we plan to use this packet
|
|
*((PPACKET_INFO*)pNewPacket->ProtocolReserved) = *pppi;
|
|
*((PPACKET_INFO*)pNewPacket->MiniportReserved) = *pppi;
|
|
|
|
// Copy whatever state needs to be copied for the direction this packet is heading
|
|
(*pFunc)(pBasePacket, pNewPacket);
|
|
|
|
return pNewPacket;
|
|
}
|
|
|
|
//
|
|
// Paranoid checking of base packets
|
|
//
|
|
#if DBG
|
|
_inline VOID
|
|
BrdgFwdCheckBasePacket(
|
|
IN PNDIS_PACKET pPacket,
|
|
IN PPACKET_INFO ppi
|
|
)
|
|
{
|
|
SAFEASSERT( ppi != NULL );
|
|
|
|
// Packets should come prepared so the PACKET_INFO structure is recoverable from
|
|
// both the MiniportReserved and ProtocolReserved areas, so it won't matter whether
|
|
// we use the packet for a send or an indicate.
|
|
SAFEASSERT( *((PPACKET_INFO*)pPacket->ProtocolReserved) == ppi );
|
|
SAFEASSERT( *((PPACKET_INFO*)pPacket->MiniportReserved) == ppi );
|
|
|
|
// The base packet refcounts its own buffers
|
|
SAFEASSERT( ppi->Flags.bIsBasePacket );
|
|
|
|
// The base packet must allow the upper-layer protocol to hang onto its buffers
|
|
SAFEASSERT( NDIS_GET_PACKET_STATUS( pPacket ) == NDIS_STATUS_SUCCESS );
|
|
}
|
|
#else
|
|
#define BrdgFwdCheckBasePacket(A,B) {}
|
|
#endif
|
|
|
|
|
|
NDIS_STATUS
|
|
BrdgFwdHandlePacket(
|
|
IN PACKET_DIRECTION PacketDirection,
|
|
IN PADAPT pTargetAdapt,
|
|
IN PADAPT pOriginalAdapt,
|
|
IN BOOLEAN bShouldIndicate,
|
|
IN NDIS_HANDLE MiniportHandle,
|
|
IN PNDIS_PACKET pBasePacket,
|
|
IN PPACKET_INFO baseppi,
|
|
IN PPACKET_BUILD_FUNC pFunc,
|
|
IN PVOID Param1,
|
|
IN PVOID Param2,
|
|
IN UINT Param3,
|
|
IN UINT Param4
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Common logic for handling packets that cannot be fast-tracked
|
|
|
|
A base packet can optionally be passed in. This is only done when handling
|
|
packets from the copy path or the no-copy path when packets arrived with
|
|
STATUS_RESOURCES set, since those types of packets must be wrapped just to
|
|
be queued for processing.
|
|
|
|
If a base packet is passed in, it is assumed that NO QUOTA has been assigned
|
|
to any adapter for that base packet. The cost of the base packet is assigned
|
|
to any prospective target via BrdgBufAssignBasePacketQuota().
|
|
|
|
If a base packet is not passed in, a function pointer must be supplied that
|
|
can build a base packet on demand from the supplied parameters. When base
|
|
packets are built on the fly, they DO require immediate quota assignments.
|
|
|
|
Note that if a base packet is passed in, it is possible for this function to
|
|
release the base packet itself (via BrdgFwdReleaseBasePacket) and return
|
|
NDIS_STATUS_PENDING.
|
|
|
|
Arguments:
|
|
|
|
PacketDirection The original direction of the packet being handled
|
|
|
|
pTargetAdapt The adapter corresponding to the packet's target
|
|
MAC address, or NULL if not known. A non-NULL value
|
|
implies that bShouldIndicate == FALSE, since it doesn't
|
|
make sense for a unicast packet bound for another
|
|
adapter to require indication to the local machine.
|
|
|
|
pOriginalAdapt The adapter on which the original packet was received
|
|
|
|
bShouldIndicate Whether the packet should be indicated to overlying protocols
|
|
|
|
MiniportHandle The handle to our local miniport (CALLER IS RESPONSIBLE
|
|
FOR ENSURING THE MINIPORT'S EXISTENCE DURING THIS CALL!)
|
|
|
|
pBasePacket The base packet to use if one has already been built (this
|
|
occurs on the copy-receive path)
|
|
|
|
baseppi The base packet's PACKET_INFO if one exists.
|
|
|
|
pFunc A function that, when passed Param1 - Param4, can build
|
|
a base packet from the originally received packet for
|
|
a particular target adapter.
|
|
|
|
Param1 - Param4 Parameters to pass to pFunc
|
|
|
|
If a base packet is not supplied, pFunc must be non-NULL. Conversely, if a base
|
|
packet is supplied, pFunc should be NULL because it will never be called.
|
|
|
|
Return Value:
|
|
|
|
NDIS_STATUS_PENDING Indicates that the base packet passed in was used successfully
|
|
or that a base packet was successfully built and used with
|
|
the help of pFunc. The base packet and any wrapper packets
|
|
build by BrdgFwdHandlePacket will be automatically deallocated
|
|
in the future; the caller need not take any additional action.
|
|
|
|
OTHER RETURN CODE No targets were found or none passed quota check. If a base
|
|
packet was passed in, the caller should free it. If there is
|
|
an underlying packet that was to be used to build a base packet,
|
|
the caller should free it.
|
|
|
|
--*/
|
|
{
|
|
BOOLEAN dataRetained = FALSE;
|
|
PACKET_DIRECTION tmpPacketDirection;
|
|
|
|
tmpPacketDirection = PacketDirection;
|
|
|
|
SAFEASSERT( (PacketDirection == BrdgPacketInbound) ||
|
|
(PacketDirection == BrdgPacketOutbound) );
|
|
|
|
SAFEASSERT( (pBasePacket != NULL) || (pFunc != NULL) );
|
|
|
|
SAFEASSERT( (pTargetAdapt == NULL) || (bShouldIndicate == FALSE) );
|
|
|
|
if( pBasePacket != NULL )
|
|
{
|
|
SAFEASSERT( baseppi != NULL );
|
|
BrdgFwdCheckBasePacket( pBasePacket, baseppi );
|
|
}
|
|
|
|
if( bShouldIndicate )
|
|
{
|
|
// Don't try to indicate if the miniport doesn't exist
|
|
if( MiniportHandle == NULL )
|
|
{
|
|
// Count this as a failed indicate
|
|
ExInterlockedAddLargeStatistic( &gStatIndicatedDroppedFrames, 1L );
|
|
bShouldIndicate = FALSE;
|
|
}
|
|
}
|
|
|
|
// Not allowed to pass in a target adapter in compatibility-mode, since
|
|
// only the compatibility-mode code is supposed to deal with those.
|
|
if( pTargetAdapt != NULL )
|
|
{
|
|
SAFEASSERT( !pTargetAdapt->bCompatibilityMode );
|
|
}
|
|
|
|
if( (pTargetAdapt != NULL) && (! bShouldIndicate) )
|
|
{
|
|
// This packet is going to a single destination.
|
|
if( pBasePacket != NULL )
|
|
{
|
|
// We were passed in a base packet. See if the target adapter can accept
|
|
// the quota of the base packet.
|
|
if( ! BrdgBufAssignBasePacketQuota(pBasePacket, pTargetAdapt) )
|
|
{
|
|
// The target is over quota and can't accept this packet. We will
|
|
// return an error code to indicate that we never used the caller's base
|
|
// packet.
|
|
pBasePacket = NULL;
|
|
baseppi = NULL;
|
|
}
|
|
// else we continue processing below
|
|
}
|
|
else
|
|
{
|
|
// Alloc a base packet with the supplied function
|
|
SAFEASSERT( pFunc != NULL );
|
|
pBasePacket = (*pFunc)(&baseppi, pTargetAdapt, Param1, Param2, Param3, Param4);
|
|
}
|
|
|
|
if( pBasePacket != NULL )
|
|
{
|
|
// Paranoia
|
|
BrdgFwdCheckBasePacket( pBasePacket, baseppi );
|
|
baseppi->u.BasePacketInfo.RefCount = 1L;
|
|
baseppi->u.BasePacketInfo.CompositeStatus = NDIS_STATUS_FAILURE;
|
|
BrdgFwdSendOnLink( pTargetAdapt, pBasePacket );
|
|
|
|
// We're using the base packet or the underlying packet used to build the
|
|
// base packet
|
|
dataRetained = TRUE;
|
|
}
|
|
else
|
|
{
|
|
THROTTLED_DBGPRINT(FWD, ("Over quota for single target adapter\n"));
|
|
|
|
if( PacketDirection == BrdgPacketOutbound )
|
|
{
|
|
// This was a failed local-source transmit
|
|
ExInterlockedAddLargeStatistic( &gStatTransmittedErrorFrames, 1L );
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// Our packet isn't bound for a single destination. Do the slow processing.
|
|
//
|
|
UINT numTargets = 0L, actualTargets, i;
|
|
PADAPT pAdapt;
|
|
PADAPT SendList[MAX_ADAPTERS];
|
|
LOCK_STATE LockState;
|
|
BOOLEAN sentBase = FALSE; // Whether we have sent the base packet yet
|
|
|
|
//
|
|
// First we need a list of the adapters we intend to send this packet to
|
|
//
|
|
|
|
NdisAcquireReadWriteLock( &gAdapterListLock, FALSE /*Read only*/, &LockState );
|
|
|
|
// Always indicate with the base packet
|
|
if( bShouldIndicate )
|
|
{
|
|
SendList[0] = LOCAL_MINIPORT;
|
|
numTargets = 1L;
|
|
}
|
|
|
|
if( pTargetAdapt != NULL )
|
|
{
|
|
BrdgReacquireAdapter( pTargetAdapt );
|
|
SendList[numTargets] = pTargetAdapt;
|
|
numTargets++;
|
|
}
|
|
else
|
|
{
|
|
// Note each adapter to send to
|
|
for( pAdapt = gAdapterList; pAdapt != NULL; pAdapt = pAdapt->Next )
|
|
{
|
|
// Don't need to acquire the global adapter characteristics lock to read the
|
|
// media state because we don't care about the global consistency of the
|
|
// adapters' characteristics here
|
|
if( (pAdapt != pOriginalAdapt) &&
|
|
(pAdapt->MediaState == NdisMediaStateConnected) && // Don't send to disconnected adapters
|
|
(pAdapt->State == Forwarding) && // Adapter must be in relaying state
|
|
(! pAdapt->bResetting) && // Adapter must not be resetting
|
|
(! pAdapt->bCompatibilityMode) ) // Adapter can't be in compat-mode
|
|
{
|
|
if( numTargets < MAX_ADAPTERS )
|
|
{
|
|
// We will use this adapter outside the list lock; bump its refcount
|
|
BrdgAcquireAdapterInLock(pAdapt);
|
|
SendList[numTargets] = pAdapt;
|
|
numTargets++;
|
|
}
|
|
else
|
|
{
|
|
// Too many copies to send!
|
|
SAFEASSERT( FALSE );
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Can let go of the adapter list now; we have copied out all the target adapters
|
|
// and incremented the refcount for the adapters we will be using.
|
|
NdisReleaseReadWriteLock( &gAdapterListLock, &LockState );
|
|
|
|
if( numTargets == 0 )
|
|
{
|
|
//
|
|
// Nowhere to send the packet! Nothing to do.
|
|
//
|
|
// This should not happen often. If the packet is a local send, our media status
|
|
// should be DISCONNECTED, so there should be no transmits from above.
|
|
//
|
|
|
|
if( PacketDirection == BrdgPacketOutbound )
|
|
{
|
|
// This was a failed local-source transmit (although the caller probably
|
|
// shouldn't have sent the packet in the first place since our media status
|
|
// should be DISCONNECTED
|
|
ExInterlockedAddLargeStatistic( &gStatTransmittedErrorFrames, 1L );
|
|
}
|
|
|
|
//
|
|
// Indicate to the caller that no send occurred
|
|
//
|
|
return NDIS_STATUS_NO_CABLE;
|
|
}
|
|
|
|
actualTargets = numTargets;
|
|
|
|
// If we had a base packet passed in, set its refcount now that we know how many
|
|
// adapters we will be targeting
|
|
if( pBasePacket != NULL )
|
|
{
|
|
baseppi->u.BasePacketInfo.RefCount = actualTargets;
|
|
baseppi->u.BasePacketInfo.CompositeStatus = NDIS_STATUS_FAILURE;
|
|
|
|
// We now need ownership of the base packet passed in; even if all our send
|
|
// attempts fail, we will release the base packet ourselves below, so the
|
|
// caller should not dispose of the base packet himself.
|
|
dataRetained = TRUE;
|
|
}
|
|
|
|
//
|
|
// Walk the list of targets and try to send to each
|
|
//
|
|
for( i = 0L; i < numTargets; i++ )
|
|
{
|
|
PADAPT OutAdapt = SendList[i];
|
|
PNDIS_PACKET pPacketToSend = NULL;
|
|
PPACKET_INFO ppiToSend = NULL;
|
|
|
|
SAFEASSERT(tmpPacketDirection == PacketDirection);
|
|
|
|
if( pBasePacket == NULL )
|
|
{
|
|
//
|
|
// We weren't passed in a base packet and we haven't built one yet. Build one now
|
|
// that we have a specific target adapter.
|
|
//
|
|
pBasePacket = (*pFunc)(&baseppi, OutAdapt, Param1, Param2, Param3, Param4);
|
|
|
|
if( pBasePacket != NULL )
|
|
{
|
|
// Paranoia
|
|
BrdgFwdCheckBasePacket( pBasePacket, baseppi );
|
|
SAFEASSERT( actualTargets > 0L );
|
|
baseppi->u.BasePacketInfo.RefCount = actualTargets;
|
|
baseppi->u.BasePacketInfo.CompositeStatus = NDIS_STATUS_FAILURE;
|
|
|
|
pPacketToSend = pBasePacket;
|
|
ppiToSend = baseppi;
|
|
sentBase = TRUE;
|
|
}
|
|
else
|
|
{
|
|
// We failed to build a base packet. Just pretend there was one less target
|
|
// for the next time through
|
|
actualTargets--;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if( ! sentBase )
|
|
{
|
|
//
|
|
// We have a base packet but we haven't sent it yet. Send to this target if quota allows.
|
|
//
|
|
if( BrdgBufAssignBasePacketQuota(pBasePacket, OutAdapt) )
|
|
{
|
|
// This target can accept the base packet.
|
|
pPacketToSend = pBasePacket;
|
|
ppiToSend = baseppi;
|
|
sentBase = TRUE;
|
|
}
|
|
else
|
|
{
|
|
// The target is over quota and can't accept this packet.
|
|
pPacketToSend = NULL;
|
|
ppiToSend = NULL;
|
|
|
|
// bookkeeping on the base packet done below
|
|
}
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// We have a base packet and we have already sent it. Use wrapper packets for each additional
|
|
// send.
|
|
//
|
|
if( baseppi->Flags.OriginalDirection == BrdgPacketInbound )
|
|
{
|
|
pPacketToSend = BrdgFwdAllocAndWrapPacketForReceive( pBasePacket, &ppiToSend, OutAdapt );
|
|
}
|
|
else
|
|
{
|
|
SAFEASSERT( baseppi->Flags.OriginalDirection == BrdgPacketOutbound );
|
|
pPacketToSend = BrdgFwdAllocAndWrapPacketForSend( pBasePacket, &ppiToSend, OutAdapt );
|
|
}
|
|
|
|
if( pPacketToSend != NULL )
|
|
{
|
|
// Signal that the upper-layer protocol can hang on to these buffers
|
|
NDIS_SET_PACKET_STATUS(pPacketToSend, NDIS_STATUS_SUCCESS);
|
|
|
|
// Set up the wrapper's info block
|
|
SAFEASSERT( ppiToSend != NULL );
|
|
ppiToSend->Flags.OriginalDirection = BrdgPacketCreatedInBridge;
|
|
ppiToSend->Flags.bIsBasePacket = FALSE;
|
|
ppiToSend->u.pBasePacketInfo = baseppi;
|
|
}
|
|
// else bookkeeping done below
|
|
}
|
|
}
|
|
|
|
if( pPacketToSend == NULL )
|
|
{
|
|
// Record the failed attempt as appropriate
|
|
SAFEASSERT( ppiToSend == NULL );
|
|
|
|
if( OutAdapt == LOCAL_MINIPORT )
|
|
{
|
|
THROTTLED_DBGPRINT(FWD, ("Over quota for local miniport during processing\n"));
|
|
ExInterlockedAddLargeStatistic( &gStatIndicatedDroppedFrames, 1L );
|
|
}
|
|
else
|
|
{
|
|
THROTTLED_DBGPRINT(FWD, ("Over quota for adapter during processing\n"));
|
|
}
|
|
|
|
if( pBasePacket != NULL )
|
|
{
|
|
// We failed to send or wrap the base packet to this target. Do bookkeeping.
|
|
SAFEASSERT( baseppi != NULL );
|
|
|
|
if( BrdgFwdDerefBasePacket( NULL/*The cost of the base packet never got assigned to OutAdapt*/,
|
|
pBasePacket, baseppi, NDIS_STATUS_FAILURE ) )
|
|
{
|
|
// We should have been the last target in the list to cause the base packet
|
|
// to actually be freed.
|
|
SAFEASSERT( i == numTargets - 1 );
|
|
pBasePacket = NULL;
|
|
baseppi = NULL;
|
|
|
|
// We just disposed of the caller's base packet, so we should not cause him to
|
|
// try to do that again on return
|
|
SAFEASSERT( dataRetained );
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// We have a packet to send.
|
|
SAFEASSERT( ppiToSend != NULL );
|
|
|
|
if( OutAdapt == LOCAL_MINIPORT )
|
|
{
|
|
// We are indicating this packet
|
|
SAFEASSERT( MiniportHandle != NULL );
|
|
BrdgFwdIndicatePacket( pPacketToSend, MiniportHandle );
|
|
}
|
|
else
|
|
{
|
|
// We are sending to an adapter, not the local miniport
|
|
BrdgFwdSendOnLink( OutAdapt, pPacketToSend );
|
|
}
|
|
|
|
// We definitely need ownership of the underlying data since we just handed it off
|
|
// to a target
|
|
dataRetained = TRUE;
|
|
}
|
|
|
|
if( OutAdapt != LOCAL_MINIPORT )
|
|
{
|
|
// We're done with this adapter now
|
|
BrdgReleaseAdapter( OutAdapt );
|
|
}
|
|
}
|
|
|
|
if( ! dataRetained )
|
|
{
|
|
// If we're not claiming ownership of the underlying data, we had better not have
|
|
// actually used it
|
|
SAFEASSERT( ! sentBase );
|
|
|
|
if( PacketDirection == BrdgPacketOutbound )
|
|
{
|
|
// This was a failed local-source transmit
|
|
ExInterlockedAddLargeStatistic( &gStatTransmittedErrorFrames, 1L );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// If we are claiming owernship of the underlying data, we must have used it or
|
|
// disposed of the base packet ourselves.
|
|
SAFEASSERT( sentBase || (pBasePacket == NULL) );
|
|
}
|
|
}
|
|
|
|
// Tell the caller whether we are hanging into his data or not
|
|
return dataRetained ? NDIS_STATUS_PENDING : NDIS_STATUS_FAILURE;
|
|
}
|
|
|
|
BOOLEAN
|
|
BrdgFwdNoCopyFastTrackReceive(
|
|
IN PNDIS_PACKET pPacket,
|
|
IN PADAPT pAdapt,
|
|
IN NDIS_HANDLE MiniportHandle,
|
|
IN PUCHAR DstAddr,
|
|
OUT BOOLEAN *bRetainPacket
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Called to indicate a packet descriptor from an underlying NIC straight up to
|
|
overlying protocols without wrapping.
|
|
|
|
Arguments:
|
|
|
|
pPacket The packet to indicate
|
|
pAdapt The adapter that owns this packet descriptor
|
|
MiniportHandle The miniport handle (must be != NULL)
|
|
DstAddr The target MAC address of the packet
|
|
|
|
bRetainPacket Whether the caller should retain ownership of the
|
|
given packet descriptor or not. TRUE if the original
|
|
packet's status was not STATUS_RESOURCES, FALSE otherwise.
|
|
Undefined if return value != TRUE
|
|
|
|
Return Value:
|
|
|
|
TRUE if the indication succeeded, FALSE otherwise.
|
|
|
|
--*/
|
|
{
|
|
BOOLEAN bRemaining;
|
|
NDIS_STATUS Status;
|
|
PNDIS_PACKET_STACK pStack;
|
|
|
|
SAFEASSERT( pPacket != NULL );
|
|
SAFEASSERT( pAdapt != NULL );
|
|
SAFEASSERT( MiniportHandle != NULL );
|
|
SAFEASSERT( bRetainPacket != NULL );
|
|
|
|
*bRetainPacket = FALSE;
|
|
|
|
// The fast-track is possible only if NDIS has room left in its packet stack
|
|
pStack = NdisIMGetCurrentPacketStack(pPacket, &bRemaining);
|
|
|
|
if ( bRemaining )
|
|
{
|
|
Status = NDIS_GET_PACKET_STATUS(pPacket);
|
|
|
|
if( Status != NDIS_STATUS_RESOURCES )
|
|
{
|
|
SAFEASSERT( (Status == NDIS_STATUS_SUCCESS) || (Status == NDIS_STATUS_PENDING) );
|
|
|
|
//
|
|
// The upper-layer protocol gets to hang on to this packet until it's done.
|
|
// We must ensure that this adapter is not allowed to shut down while we are
|
|
// still holding its packet. As a special case for fast-track receives, we
|
|
// stash a pointer to the adapter's PADAPT struct in the magic NDIS stack
|
|
// area reserved for intermediate drivers. This allows us to decrement the
|
|
// adapter's refcount when the indication completes.
|
|
//
|
|
BrdgReacquireAdapter( pAdapt );
|
|
pStack->IMReserved[0] = (ULONG_PTR)pAdapt;
|
|
|
|
// Tell the caller to retain ownership of the packet
|
|
*bRetainPacket = TRUE;
|
|
}
|
|
else
|
|
{
|
|
// Paranoia: zero out the area we use to stash the PADAPT pointer in case
|
|
// we get confused about the path this packet took
|
|
pStack->IMReserved[0] = 0L;
|
|
|
|
// Tell the owner not to retain ownership of the packet
|
|
*bRetainPacket = FALSE;
|
|
}
|
|
|
|
// Count the packet as received
|
|
ExInterlockedAddLargeStatistic( &gStatReceivedFrames, 1L );
|
|
ExInterlockedAddLargeStatistic( &gStatReceivedBytes, BrdgBufTotalPacketSize(pPacket) );
|
|
ExInterlockedAddLargeStatistic( &gStatReceivedNoCopyFrames, 1L );
|
|
ExInterlockedAddLargeStatistic( &gStatReceivedNoCopyBytes, BrdgBufTotalPacketSize(pPacket) );
|
|
ExInterlockedAddLargeStatistic( &pAdapt->ReceivedFrames, 1L );
|
|
ExInterlockedAddLargeStatistic( &pAdapt->ReceivedBytes, BrdgBufTotalPacketSize(pPacket) );
|
|
|
|
// Hand up to overlying protocols
|
|
BrdgFwdIndicatePacket( pPacket, MiniportHandle );
|
|
|
|
// Fast-track succeeded.
|
|
return TRUE;
|
|
}
|
|
|
|
// Can't fast-track.
|
|
return FALSE;
|
|
}
|
|
|
|
//
|
|
// Changes Bridging Status due to a GPO change
|
|
//
|
|
|
|
VOID
|
|
BrdgFwdChangeBridging(
|
|
IN BOOLEAN Bridging
|
|
)
|
|
{
|
|
//
|
|
// Since we don't want to empty our tables if the settings are the same, we check
|
|
// this before updating anything. If nothing has changed, we just return
|
|
//
|
|
if (gBridging != Bridging)
|
|
{
|
|
gBridging = Bridging;
|
|
// Remove all MAC addresses from tables
|
|
BrdgTblScrubAllAdapters();
|
|
// Remove all IP addresses from tables
|
|
BrdgCompScrubAllAdapters();
|
|
if (!Bridging)
|
|
{
|
|
DBGPRINT(FWD, ("Bridging is now OFF.\r\n"));
|
|
if (gHaveID)
|
|
{
|
|
BrdgSTACancelTimersGPO();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
DBGPRINT(FWD, ("Bridging is now ON.\r\n"));
|
|
if (gHaveID)
|
|
{
|
|
BrdgSTARestartTimersGPO();
|
|
BrdgSTAResetSTAInfoGPO();
|
|
}
|
|
}
|
|
}
|
|
}
|