127 lines
4 KiB
C
127 lines
4 KiB
C
/*++
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Copyright(c) 1998,99 Microsoft Corporation
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Module Name:
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util.h
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Abstract:
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Windows Load Balancing Service (WLBS)
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Driver - media support definitions
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Author:
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kyrilf
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--*/
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#ifndef _Util_h_
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#define _Util_h_
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#include <ndis.h>
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#include <xfilter.h>
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#include "wlbsparm.h"
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/* CONSTANTS */
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/* media-specific constants */
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#define ETHERNET_DESTINATION_FIELD_OFFSET 0
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#define ETHERNET_SOURCE_FIELD_OFFSET 6
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#define ETHERNET_LENGTH_FIELD_OFFSET 12
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#define ETHERNET_LENGTH_FIELD_SIZE 2
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#define ETHERNET_ADDRESS_FIELD_SIZE 6
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#define ETHERNET_HEADER_SIZE 14
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/* flags are in byte 0 of ethernet address */
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#define ETHERNET_GROUP_FLAG 0x1
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#define ETHERNET_LAA_FLAG 0x2
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/* max frame size we expect to generate */
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#define CVY_MAX_FRAME_SIZE 1500
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/* TYPES */
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#pragma pack(1)
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/* ethernet media header type */
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typedef struct
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{
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UCHAR data [ETHERNET_ADDRESS_FIELD_SIZE];
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}
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CVY_ETHERNET_ADR, * PCVY_ETHERNET_ADR;
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typedef struct
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{
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UCHAR data [ETHERNET_LENGTH_FIELD_SIZE];
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}
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CVY_ETHERNET_LEN, * PCVY_ETHERNET_LEN;
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typedef struct
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{
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CVY_ETHERNET_ADR dst;
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CVY_ETHERNET_ADR src;
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CVY_ETHERNET_LEN len;
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}
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CVY_ETHERNET_HDR, * PCVY_ETHERNET_HDR;
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typedef union
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{
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CVY_ETHERNET_HDR ethernet;
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}
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CVY_MEDIA_HDR, * PCVY_MEDIA_HDR;
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typedef union
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{
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CVY_ETHERNET_ADR ethernet;
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}
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CVY_MAC_ADR, * PCVY_MAC_ADR;
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/* V1.3.1b medium independent MAC address manipulation routines - note that these
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are optimized for speed and assume that all mediums have the same size addresses.
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NOTE: The seemingly silly format of these macros is simply to leave fenceposts
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for the future additions of other supported mediums. */
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#define CVY_MAC_SRC_OFF(m) ((m) == NdisMedium802_3 ? ETHERNET_SOURCE_FIELD_OFFSET : ETHERNET_SOURCE_FIELD_OFFSET)
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#define CVY_MAC_DST_OFF(m) ((m) == NdisMedium802_3 ? ETHERNET_DESTINATION_FIELD_OFFSET : ETHERNET_DESTINATION_FIELD_OFFSET)
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#define CVY_MAC_HDR_LEN(m) ((m) == NdisMedium802_3 ? sizeof (CVY_ETHERNET_HDR) : sizeof (CVY_ETHERNET_HDR))
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#define CVY_MAC_ADDR_LEN(m) ((m) == NdisMedium802_3 ? ETHERNET_ADDRESS_FIELD_SIZE : ETHERNET_ADDRESS_FIELD_SIZE)
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#define CVY_MAC_ADDR_BCAST(m,a) (((PUCHAR)(a))[0] == 0xff)
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#define CVY_MAC_ADDR_MCAST(m,a) (((PUCHAR)(a))[0] & 0x1)
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#define CVY_MAC_ADDR_GROUP_SET(m,a) ((((PUCHAR)(a))[0]) |= 0x1)
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#define CVY_MAC_ADDR_GROUP_TOGGLE(m,a) ((((PUCHAR)(a))[0]) ^= 0x1)
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#define CVY_MAC_ADDR_LAA_SET(m,a) ((((PUCHAR)(a))[0]) |= 0x2)
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#define CVY_MAC_ADDR_LAA_TOGGLE(m,a) ((((PUCHAR)(a))[0]) ^= 0x2)
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#define CVY_MAC_ADDR_COMP(m,a,b) ((* (ULONG UNALIGNED *)(a) == * (ULONG UNALIGNED *)(b)) && \
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(* (USHORT UNALIGNED *)((PUCHAR)(a) + sizeof (ULONG)) == \
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* (USHORT UNALIGNED *)((PUCHAR)(b) + sizeof (ULONG))))
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#define CVY_MAC_ADDR_COPY(m,d,s) ((* (ULONG UNALIGNED *)(d) = * (ULONG UNALIGNED *)(s)), \
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(* (USHORT UNALIGNED *)((PUCHAR)(d) + sizeof (ULONG)) = \
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* (USHORT UNALIGNED *)((PUCHAR)(s) + sizeof (ULONG))))
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#if DBG
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#define CVY_MAC_ADDR_PRINT(m,s,a) DbgPrint ("%s %02X-%02X-%02X-%02X-%02X-%02X\n", s, ((PUCHAR)(a))[0], ((PUCHAR)(a))[1], ((PUCHAR)(a))[2], ((PUCHAR)(a))[3], ((PUCHAR)(a))[4], ((PUCHAR)(a))[5])
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#else
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#define CVY_MAC_ADDR_PRINT(m,s,a)
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#endif
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/* Medium type field manipulation routines */
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#define CVY_ETHERNET_ETYPE_SET(p,l) ((PUCHAR) (p)) [ETHERNET_LENGTH_FIELD_OFFSET] = (UCHAR) ((l) >> 8); \
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((PUCHAR) (p)) [ETHERNET_LENGTH_FIELD_OFFSET + 1] = (UCHAR) (l)
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#define CVY_ETHERNET_ETYPE_GET(p) (((USHORT) ((PUCHAR) (p)) [ETHERNET_LENGTH_FIELD_OFFSET]) << 8) | \
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((USHORT) ((PUCHAR) (p)) [ETHERNET_LENGTH_FIELD_OFFSET + 1])
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#pragma pack()
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#endif /* _Util_h_ */
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