270 lines
9.9 KiB
C
270 lines
9.9 KiB
C
/*++
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Copyright (c) Microsoft Corporation. All rights reserved.
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Module Name:
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xfilter.h
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Abstract:
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Header file for the address filtering library for NDIS MAC's.
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Author:
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Environment:
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Notes:
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None.
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Revision History:
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--*/
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#ifndef _X_FILTER_DEFS_
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#define _X_FILTER_DEFS_
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#pragma once
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#define ETH_LENGTH_OF_ADDRESS 6
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//
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// ZZZ This is a little-endian specific check.
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//
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#define ETH_IS_MULTICAST(Address) \
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(BOOLEAN)(((PUCHAR)(Address))[0] & ((UCHAR)0x01))
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//
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// Check whether an address is broadcast.
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//
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#define ETH_IS_BROADCAST(Address) \
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((((PUCHAR)(Address))[0] == ((UCHAR)0xff)) && (((PUCHAR)(Address))[1] == ((UCHAR)0xff)) && (((PUCHAR)(Address))[2] == ((UCHAR)0xff)) && (((PUCHAR)(Address))[3] == ((UCHAR)0xff)) && (((PUCHAR)(Address))[4] == ((UCHAR)0xff)) && (((PUCHAR)(Address))[5] == ((UCHAR)0xff)))
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//
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// This macro will compare network addresses.
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//
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// A - Is a network address.
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//
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// B - Is a network address.
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//
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// Result - The result of comparing two network address.
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//
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// Result < 0 Implies the B address is greater.
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// Result > 0 Implies the A element is greater.
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// Result = 0 Implies equality.
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//
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// Note that this is an arbitrary ordering. There is not
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// defined relation on network addresses. This is ad-hoc!
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//
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//
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#define ETH_COMPARE_NETWORK_ADDRESSES(_A, _B, _Result) \
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{ \
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if (*(ULONG UNALIGNED *)&(_A)[2] > \
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*(ULONG UNALIGNED *)&(_B)[2]) \
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{ \
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*(_Result) = 1; \
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} \
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else if (*(ULONG UNALIGNED *)&(_A)[2] < \
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*(ULONG UNALIGNED *)&(_B)[2]) \
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{ \
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*(_Result) = (UINT)-1; \
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} \
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else if (*(USHORT UNALIGNED *)(_A) > \
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*(USHORT UNALIGNED *)(_B)) \
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{ \
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*(_Result) = 1; \
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} \
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else if (*(USHORT UNALIGNED *)(_A) < \
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*(USHORT UNALIGNED *)(_B)) \
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{ \
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*(_Result) = (UINT)-1; \
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} \
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else \
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{ \
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*(_Result) = 0; \
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} \
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}
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//
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// This macro will compare network addresses.
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//
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// A - Is a network address.
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//
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// B - Is a network address.
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//
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// Result - The result of comparing two network address.
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//
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// Result != 0 Implies inequality.
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// Result == 0 Implies equality.
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//
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//
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#define ETH_COMPARE_NETWORK_ADDRESSES_EQ(_A,_B, _Result) \
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{ \
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if ((*(ULONG UNALIGNED *)&(_A)[2] == \
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*(ULONG UNALIGNED *)&(_B)[2]) && \
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(*(USHORT UNALIGNED *)(_A) == \
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*(USHORT UNALIGNED *)(_B))) \
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{ \
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*(_Result) = 0; \
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} \
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else \
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{ \
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*(_Result) = 1; \
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} \
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}
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//
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// This macro is used to copy from one network address to
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// another.
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//
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#define ETH_COPY_NETWORK_ADDRESS(_D, _S) \
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{ \
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*((ULONG UNALIGNED *)(_D)) = *((ULONG UNALIGNED *)(_S)); \
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*((USHORT UNALIGNED *)((UCHAR *)(_D)+4)) = *((USHORT UNALIGNED *)((UCHAR *)(_S)+4)); \
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}
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#define TR_LENGTH_OF_FUNCTIONAL 4
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#define TR_LENGTH_OF_ADDRESS 6
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//
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// Only the low 32 bits of the functional/group address
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// are needed since the upper 16 bits is always c0-00.
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//
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typedef ULONG TR_FUNCTIONAL_ADDRESS;
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typedef ULONG TR_GROUP_ADDRESS;
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#define TR_IS_NOT_DIRECTED(_Address, _Result) \
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{ \
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*(_Result) = (BOOLEAN)((_Address)[0] & 0x80); \
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}
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#define TR_IS_FUNCTIONAL(_Address, _Result) \
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{ \
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*(_Result) = (BOOLEAN)(((_Address)[0] & 0x80) && \
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!((_Address)[2] & 0x80)); \
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}
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//
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//
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#define TR_IS_GROUP(_Address, _Result) \
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{ \
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*(_Result) = (BOOLEAN)((_Address)[0] & (_Address)[2] & 0x80); \
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}
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//
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//
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#define TR_IS_SOURCE_ROUTING(_Address, _Result) \
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{ \
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*(_Result) = (BOOLEAN)((_Address)[0] & 0x80); \
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}
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//
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// Check for NDIS_PACKET_TYPE_MAC_FRAME
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//
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#define TR_IS_MAC_FRAME(_PacketHeader) ((((PUCHAR)_PacketHeader)[1] & 0xFC) == 0)
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//
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// Check whether an address is broadcast. This is a little-endian check.
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//
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#define TR_IS_BROADCAST(_Address, _Result) \
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{ \
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*(_Result) = (BOOLEAN)(((*(UNALIGNED USHORT *)&(_Address)[0] == 0xFFFF) || \
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(*(UNALIGNED USHORT *)&(_Address)[0] == 0x00C0)) && \
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(*(UNALIGNED ULONG *)&(_Address)[2] == 0xFFFFFFFF));\
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}
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//
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// This macro will compare network addresses.
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//
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// A - Is a network address.
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//
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// B - Is a network address.
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//
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// Result - The result of comparing two network address.
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//
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// Result < 0 Implies the B address is greater.
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// Result > 0 Implies the A element is greater.
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// Result = 0 Implies equality.
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//
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// Note that this is an arbitrary ordering. There is not
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// defined relation on network addresses. This is ad-hoc!
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//
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//
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#define TR_COMPARE_NETWORK_ADDRESSES(_A, _B, _Result) \
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{ \
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if (*(ULONG UNALIGNED *)&(_A)[2] > \
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*(ULONG UNALIGNED *)&(_B)[2]) \
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{ \
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*(_Result) = 1; \
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} \
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else if (*(ULONG UNALIGNED *)&(_A)[2] < \
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*(ULONG UNALIGNED *)&(_B)[2]) \
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{ \
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*(_Result) = (UINT)-1; \
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} \
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else if (*(USHORT UNALIGNED *)(_A) > \
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*(USHORT UNALIGNED *)(_B)) \
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{ \
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*(_Result) = 1; \
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} \
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else if (*(USHORT UNALIGNED *)(_A) < \
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*(USHORT UNALIGNED *)(_B)) \
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{ \
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*(_Result) = (UINT)-1; \
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} \
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else \
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{ \
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*(_Result) = 0; \
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} \
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}
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//
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// This macro will compare network addresses.
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//
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// A - Is a network address.
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//
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// B - Is a network address.
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//
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// Result - The result of comparing two network address.
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//
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// Result != 0 Implies inequality.
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// Result == 0 Implies equality.
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//
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//
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#define TR_COMPARE_NETWORK_ADDRESSES_EQ(_A, _B, _Result) \
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{ \
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if ((*(ULONG UNALIGNED *)&(_A)[2] == *(ULONG UNALIGNED *)&(_B)[2]) && \
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(*(USHORT UNALIGNED *)&(_A)[0] == *(USHORT UNALIGNED *)&(_B)[0])) \
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{ \
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*(_Result) = 0; \
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} \
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else \
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{ \
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*(_Result) = 1; \
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} \
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}
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//
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// This macro is used to copy from one network address to
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// another.
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//
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#define TR_COPY_NETWORK_ADDRESS(_D, _S) \
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{ \
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*((ULONG UNALIGNED *)(_D)) = *((ULONG UNALIGNED *)(_S)); \
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*((USHORT UNALIGNED *)((UCHAR *)(_D)+4)) = \
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*((USHORT UNALIGNED *)((UCHAR *)(_S)+4)); \
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}
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#endif // _X_FILTER_DEFS_
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