150 lines
4.2 KiB
C
150 lines
4.2 KiB
C
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/*++
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Copyright (c) 1992-1996 Microsoft Corporation
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Module Name:
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arp.h
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Abstract:
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This file contains the definitions and data declarations for the atmarp server.
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Author:
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Jameel Hyder (jameelh@microsoft.com) July 1996
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Environment:
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Kernel mode
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Revision History:
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--*/
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//
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// Definition for an IP address
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//
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typedef ULONG IPADDR; // An IP address
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//
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// OpCodes - Define these in network byte order
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//
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#define ATMARP_Request 0x0100
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#define ATMARP_Reply 0x0200
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#define InATMARP_Request 0x0800
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#define InATMARP_Reply 0x0900
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#define ATMARP_Nak 0x0A00
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#define ATM_HWTYPE 0x1300 // ATM Forum assigned - in network byte order
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#define IP_PROTOCOL_TYPE 0x0008 // In network byte order
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#define IP_ADDR_LEN sizeof(IPADDR)
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//
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// the offset into the 20 byte ATM address where the ESI starts
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//
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#define ESI_START_OFFSET 13
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//
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// Structure of a Q2931 ARP header.
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//
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//
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// Encoding of the TL, ATM Number and ATM Sub-address encoding
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//
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typedef UCHAR ATM_ADDR_TL;
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#define TL_LEN(_x_) ((_x_) & 0x3F) // Low 6 bits
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// range is from 0-ATM_ADDRESS_LENGTH
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#define TL_TYPE(_x_) (((_x_) & 0x40) >> 6) // Bit # 7, 0 - ATM Forum NSAP, 1 - E164
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#define TL_RESERVED(_x_) (((_x_) & 0x80) >> 7) // Bit # 8 - Must be 0
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#define TL(_type_, _len_) (((UCHAR)(_type_) << 6) + (UCHAR)(_len_))
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#define ADDR_TYPE_NSAP 0
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#define ADDR_TYPE_E164 1
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#if (ADDR_TYPE_NSAP != ATM_NSAP)
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#error "Atm address type mismatch"
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#endif
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#if (ADDR_TYPE_E164 != ATM_E164)
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#error "Atm address type mismatch"
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#endif
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//
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// the structure for the LLC/SNAP encapsulation header on the IP packets for Q2931
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//
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typedef struct
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{
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UCHAR LLC[3];
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UCHAR OUI[3];
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USHORT EtherType;
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} LLC_SNAP_HDR, *PLLC_SNAP_HDR;
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//
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// On the wire format for Atm ARP request
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//
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typedef struct _ARPS_HEADER
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{
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LLC_SNAP_HDR LlcSnapHdr; // LLC SNAP Header
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USHORT HwType; // Hardware address space.
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USHORT Protocol; // Protocol address space.
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ATM_ADDR_TL SrcAddressTL; // Src ATM number type & length
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ATM_ADDR_TL SrcSubAddrTL; // Src ATM subaddr type & length
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USHORT Opcode; // Opcode.
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UCHAR SrcProtoAddrLen; // Src protocol addr length
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ATM_ADDR_TL DstAddressTL; // Dest ATM number type & length
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ATM_ADDR_TL DstSubAddrTL; // Dest ATM subaddr type & length
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UCHAR DstProtoAddrLen; // Dest protocol addr length
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//
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// This is followed by variable length fields and is dictated by the value of fields above.
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//
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} ARPS_HEADER, *PARPS_HEADER;
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//
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// The following structure is used ONLY to allocate space for the packet.
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// It represents the maximum space needed for an arp request/reply.
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//
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typedef struct
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{
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UCHAR SrcHwAddr[ATM_ADDRESS_LENGTH]; // Source HW address.
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UCHAR SrcHwSubAddr[ATM_ADDRESS_LENGTH];// Source HW sub-address.
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IPADDR SrcProtoAddr; // Source protocol address.
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UCHAR DstHwAddr[ATM_ADDRESS_LENGTH]; // Destination HW address.
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UCHAR DstHwSubAddr[ATM_ADDRESS_LENGTH];// Destination HW sub-address.
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IPADDR DstProtoAddr; // Destination protocol address.
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} ARPS_VAR_HDR, *PARPS_VAR_HDR;
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//
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// Get a short (16-bits) from on-the-wire format (big-endian)
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// to a short in the host format (either big or little endian)
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//
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#define GETSHORT2SHORT(_D_, _S_) \
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*(PUSHORT)(_D_) = ((*((PUCHAR)(_S_)+0) << 8) + (*((PUCHAR)(_S_)+1)))
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//
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// Copy a short (16-bits) from the host format (either big or little endian)
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// to a short in the on-the-wire format (big-endian)
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//
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#define PUTSHORT2SHORT(_D_, _S_) \
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*((PUCHAR)(_D_)+0) = (UCHAR)((USHORT)(_S_) >> 8), \
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*((PUCHAR)(_D_)+1) = (UCHAR)(_S_)
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//
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// Get a ULONG from on-the-wire format to a ULONG in the host format
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//
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#define GETULONG2ULONG(DstPtr, SrcPtr) \
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*(PULONG)(DstPtr) = ((*((PUCHAR)(SrcPtr)+0) << 24) + \
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(*((PUCHAR)(SrcPtr)+1) << 16) + \
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(*((PUCHAR)(SrcPtr)+2) << 8) + \
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(*((PUCHAR)(SrcPtr)+3) ))
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//
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// Put a ULONG from the host format to a ULONG to on-the-wire format
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//
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#define PUTULONG2ULONG(DstPtr, Src) \
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*((PUCHAR)(DstPtr)+0) = (UCHAR) ((ULONG)(Src) >> 24), \
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*((PUCHAR)(DstPtr)+1) = (UCHAR) ((ULONG)(Src) >> 16), \
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*((PUCHAR)(DstPtr)+2) = (UCHAR) ((ULONG)(Src) >> 8), \
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*((PUCHAR)(DstPtr)+3) = (UCHAR) (Src)
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