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diff --git a/private/ntos/tdi/nbf/nbfmac.c b/private/ntos/tdi/nbf/nbfmac.c
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+++ b/private/ntos/tdi/nbf/nbfmac.c
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+/*++
+
+Copyright (c) 1989, 1990, 1991 Microsoft Corporation
+
+Module Name:
+
+ nbfmac.c
+
+Abstract:
+
+ This module contains code which implements Mac type dependent code for
+ the NBF transport.
+
+Author:
+
+ David Beaver (dbeaver) 1-July-1991
+
+Environment:
+
+ Kernel mode (Actually, unimportant)
+
+Revision History:
+
+--*/
+
+#include "precomp.h"
+#pragma hdrstop
+
+UCHAR SingleRouteSourceRouting[] = { 0xc2, 0x70 };
+UCHAR GeneralRouteSourceRouting[] = { 0x82, 0x70 };
+ULONG DefaultSourceRoutingLength = 2;
+
+//
+// This is the interpretation of the length bits in
+// the 802.5 source-routing information.
+//
+
+ULONG SR802_5Lengths[8] = { 516, 1500, 2052, 4472,
+ 8144, 11407, 17800, 17800 };
+
+
+#ifdef ALLOC_PRAGMA
+#pragma alloc_text(PAGE,MacInitializeMacInfo)
+#pragma alloc_text(PAGE,MacSetNetBIOSMulticast)
+#endif
+
+
+VOID
+MacInitializeMacInfo(
+ IN NDIS_MEDIUM MacType,
+ IN BOOLEAN UseDix,
+ OUT PNBF_NDIS_IDENTIFICATION MacInfo
+ )
+
+/*++
+
+Routine Description:
+
+ Fills in the MacInfo table based on MacType.
+
+Arguments:
+
+ MacType - The MAC type we wish to decode.
+
+ UseDix - TRUE if we should use DIX encoding on 802.3.
+
+ MacInfo - The MacInfo structure to fill in.
+
+Return Value:
+
+ None.
+
+--*/
+
+{
+ switch (MacType) {
+ case NdisMedium802_3:
+ MacInfo->DestinationOffset = 0;
+ MacInfo->SourceOffset = 6;
+ MacInfo->SourceRouting = FALSE;
+ MacInfo->AddressLength = 6;
+ if (UseDix) {
+ MacInfo->TransferDataOffset = 3;
+ MacInfo->MaxHeaderLength = 17;
+ MacInfo->MediumType = NdisMediumDix;
+ } else {
+ MacInfo->TransferDataOffset = 0;
+ MacInfo->MaxHeaderLength = 14;
+ MacInfo->MediumType = NdisMedium802_3;
+ }
+ MacInfo->MediumAsync = FALSE;
+ break;
+ case NdisMedium802_5:
+ MacInfo->DestinationOffset = 2;
+ MacInfo->SourceOffset = 8;
+ MacInfo->SourceRouting = TRUE;
+ MacInfo->AddressLength = 6;
+ MacInfo->TransferDataOffset = 0;
+ MacInfo->MaxHeaderLength = 32;
+ MacInfo->MediumType = NdisMedium802_5;
+ MacInfo->MediumAsync = FALSE;
+ break;
+ case NdisMediumFddi:
+ MacInfo->DestinationOffset = 1;
+ MacInfo->SourceOffset = 7;
+ MacInfo->SourceRouting = FALSE;
+ MacInfo->AddressLength = 6;
+ MacInfo->TransferDataOffset = 0;
+ MacInfo->MaxHeaderLength = 13;
+ MacInfo->MediumType = NdisMediumFddi;
+ MacInfo->MediumAsync = FALSE;
+ break;
+ case NdisMediumWan:
+ MacInfo->DestinationOffset = 0;
+ MacInfo->SourceOffset = 6;
+ MacInfo->SourceRouting = FALSE;
+ MacInfo->AddressLength = 6;
+ MacInfo->TransferDataOffset = 0;
+ MacInfo->MaxHeaderLength = 14;
+ MacInfo->MediumType = NdisMedium802_3;
+ MacInfo->MediumAsync = TRUE;
+ break;
+ default:
+ ASSERT(FALSE);
+ }
+}
+
+VOID
+MacConstructHeader (
+ IN PNBF_NDIS_IDENTIFICATION MacInfo,
+ IN PUCHAR Buffer,
+ IN PUCHAR DestinationAddress,
+ IN PUCHAR SourceAddress,
+ IN UINT PacketLength,
+ IN PUCHAR SourceRouting,
+ IN UINT SourceRoutingLength,
+ OUT PUINT HeaderLength
+ )
+
+/*++
+
+Routine Description:
+
+ This routine is called to construct the Mac header for the particular
+ network type we're talking to.
+
+Arguments:
+
+ MacInfo - Describes the mac we wish to build a header for.
+
+ Buffer - Where to build the header.
+
+ DestinationAddress - the address this packet is to be sent to.
+
+ SourceAddress - Our address. Passing it in as a parameter allows us to play
+ games with source if we need to.
+
+ PacketLength - The length of this packet. Note that this does not
+ includes the Mac header.
+
+ SourceRouting - Optional source routing information.
+
+ SourceRoutingLength - The length of SourceRouting.
+
+ HeaderLength - Returns the length of the constructed header.
+
+Return Value:
+
+ None.
+
+--*/
+{
+
+ //
+ // Note network order of bytes.
+ //
+
+ switch (MacInfo->MediumType) {
+
+ case NdisMedium802_3:
+
+ *(ULONG UNALIGNED *)&Buffer[6] = *(ULONG UNALIGNED *)&SourceAddress[0];
+ Buffer[10] = SourceAddress[4];
+ Buffer[11] = SourceAddress[5];
+
+ *(ULONG UNALIGNED *)&Buffer[0] = *(ULONG UNALIGNED *)&DestinationAddress[0];
+ Buffer[4] = DestinationAddress[4];
+ Buffer[5] = DestinationAddress[5];
+
+ Buffer[12] = (UCHAR)(PacketLength >> 8);
+ Buffer[13] = (UCHAR)PacketLength;
+
+ *HeaderLength = 14;
+
+ break;
+
+ case NdisMediumDix:
+
+ *(ULONG UNALIGNED *)&Buffer[6] = *(ULONG UNALIGNED *)&SourceAddress[0];
+ Buffer[10] = SourceAddress[4];
+ Buffer[11] = SourceAddress[5];
+
+ *(ULONG UNALIGNED *)&Buffer[0] = *(ULONG UNALIGNED *)&DestinationAddress[0];
+ Buffer[4] = DestinationAddress[4];
+ Buffer[5] = DestinationAddress[5];
+
+ Buffer[12] = 0x80;
+ Buffer[13] = 0xd5;
+
+ Buffer[14] = (UCHAR)(PacketLength >> 8);
+ Buffer[15] = (UCHAR)PacketLength;
+
+ Buffer[16] = 0x00;
+ *HeaderLength = 17;
+
+ break;
+
+ case NdisMedium802_5:
+
+ Buffer[0] = TR_HEADER_BYTE_0;
+ Buffer[1] = TR_HEADER_BYTE_1;
+
+ ASSERT (TR_ADDRESS_LENGTH == 6);
+
+ *(ULONG UNALIGNED *)&Buffer[8] = *(ULONG UNALIGNED *)&SourceAddress[0];
+ Buffer[12] = SourceAddress[4];
+ Buffer[13] = SourceAddress[5];
+
+ *(ULONG UNALIGNED *)&Buffer[2] = *(ULONG UNALIGNED *)&DestinationAddress[0];
+ Buffer[6] = DestinationAddress[4];
+ Buffer[7] = DestinationAddress[5];
+
+ *HeaderLength = 14;
+ if (SourceRouting != NULL) {
+ RtlCopyMemory (&Buffer[14], SourceRouting, SourceRoutingLength);
+ Buffer[8] |= 0x80; // add SR bit in source address
+ *HeaderLength = 14 + SourceRoutingLength;
+ }
+
+ break;
+
+ case NdisMediumFddi:
+
+ Buffer[0] = FDDI_HEADER_BYTE;
+
+ *(ULONG UNALIGNED *)&Buffer[7] = *(ULONG UNALIGNED *)&SourceAddress[0];
+ Buffer[11] = SourceAddress[4];
+ Buffer[12] = SourceAddress[5];
+
+ *(ULONG UNALIGNED *)&Buffer[1] = *(ULONG UNALIGNED *)&DestinationAddress[0];
+ Buffer[5] = DestinationAddress[4];
+ Buffer[6] = DestinationAddress[5];
+
+ *HeaderLength = 13;
+
+ break;
+
+ default:
+ PANIC ("MacConstructHeader: PANIC! called with unsupported Mac type.\n");
+ }
+}
+
+
+VOID
+MacReturnMaxDataSize(
+ IN PNBF_NDIS_IDENTIFICATION MacInfo,
+ IN PUCHAR SourceRouting,
+ IN UINT SourceRoutingLength,
+ IN UINT DeviceMaxFrameSize,
+ IN BOOLEAN AssumeWorstCase,
+ OUT PUINT MaxFrameSize
+ )
+
+/*++
+
+Routine Description:
+
+ This routine returns the space available for user data in a MAC packet.
+ This will be the available space after the MAC header; all LLC and NBF
+ headers will be included in this space.
+
+Arguments:
+
+ MacInfo - Describes the MAC we wish to decode.
+
+ SourceRouting - If we are concerned about a reply to a specific
+ frame, then this information is used.
+
+ SourceRouting - The length of SourceRouting.
+
+ MaxFrameSize - The maximum frame size as returned by the adapter.
+
+ AssumeWorstCase - TRUE if we should be pessimistic.
+
+ MaxDataSize - The maximum data size computed.
+
+Return Value:
+
+ None.
+
+--*/
+
+{
+ switch (MacInfo->MediumType) {
+
+ case NdisMedium802_3:
+
+ //
+ // For 802.3, we always have a 14-byte MAC header.
+ //
+
+ *MaxFrameSize = DeviceMaxFrameSize - 14;
+ break;
+
+ case NdisMediumDix:
+
+ //
+ // For DIX, we have the 14-byte MAC header plus
+ // the three-byte DIX header.
+ //
+
+ *MaxFrameSize = DeviceMaxFrameSize - 17;
+ break;
+
+ case NdisMedium802_5:
+
+ //
+ // For 802.5, if we have source routing information then
+ // use that, otherwise assume the worst if told to.
+ //
+
+ if (SourceRouting && SourceRoutingLength >= 2) {
+
+ UINT SRLength;
+
+ SRLength = SR802_5Lengths[(SourceRouting[1] & 0x70) >> 4];
+ DeviceMaxFrameSize -= (SourceRoutingLength + 14);
+
+ if (DeviceMaxFrameSize < SRLength) {
+ *MaxFrameSize = DeviceMaxFrameSize;
+ } else {
+ *MaxFrameSize = SRLength;
+ }
+
+ } else {
+
+ if (!AssumeWorstCase) {
+ *MaxFrameSize = DeviceMaxFrameSize - 16;
+ } else if (DeviceMaxFrameSize < (544+sizeof(DLC_FRAME)+sizeof(NBF_HDR_CONNECTIONLESS))) {
+ *MaxFrameSize = DeviceMaxFrameSize - 32;
+ } else {
+ *MaxFrameSize = 512 + sizeof(DLC_FRAME) + sizeof(NBF_HDR_CONNECTIONLESS);
+ }
+ }
+
+ break;
+
+ case NdisMediumFddi:
+
+ //
+ // For FDDI, we always have a 13-byte MAC header.
+ //
+
+ *MaxFrameSize = DeviceMaxFrameSize - 13;
+ break;
+
+ }
+}
+
+
+
+VOID
+MacSetNetBIOSMulticast (
+ IN NDIS_MEDIUM Type,
+ IN PUCHAR Buffer
+ )
+/*++
+
+Routine Description:
+
+ This routine sets the NetBIOS broadcast address into a buffer provided
+ by the user.
+
+Arguments:
+
+ Type the Mac Medium type.
+
+ Buffer the buffer to put the multicast address in.
+
+
+Return Value:
+
+ none.
+
+--*/
+{
+ switch (Type) {
+ case NdisMedium802_3:
+ case NdisMediumDix:
+ Buffer[0] = 0x03;
+ Buffer[ETHERNET_ADDRESS_LENGTH-1] = 0x01;
+ break;
+
+ case NdisMedium802_5:
+ Buffer[0] = 0xc0;
+ Buffer[TR_ADDRESS_LENGTH-1] = 0x80;
+ break;
+
+ case NdisMediumFddi:
+ Buffer[0] = 0x03;
+ Buffer[FDDI_ADDRESS_LENGTH-1] = 0x01;
+ break;
+
+ default:
+ PANIC ("MacSetNetBIOSAddress: PANIC! called with unsupported Mac type.\n");
+ }
+}
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