168 lines
5.4 KiB
C
168 lines
5.4 KiB
C
// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil -*- (for GNU Emacs)
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//
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// Copyright (c) 1985-2000 Microsoft Corporation
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//
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// This file is part of the Microsoft Research IPv6 Network Protocol Stack.
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// You should have received a copy of the Microsoft End-User License Agreement
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// for this software along with this release; see the file "license.txt".
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// If not, please see http://www.research.microsoft.com/msripv6/license.htm,
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// or write to Microsoft Research, One Microsoft Way, Redmond, WA 98052-6399.
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//
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// Abstract:
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//
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// LAN driver definitions.
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//
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#ifndef LAN_INCLUDED
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#define LAN_INCLUDED 1
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#define INTERFACE_UP 0 // Interface is up.
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#define INTERFACE_INIT 1 // Interface is initializing.
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#define INTERFACE_DOWN 2 // Interface is down.
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#define LOOKAHEAD_SIZE 128 // A reasonable lookahead size.
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#define IEEE_802_ADDR_LENGTH 6 // Length of an IEEE 802 address.
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//
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// Structure of an Ethernet header.
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//
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typedef struct EtherHeader {
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uchar eh_daddr[IEEE_802_ADDR_LENGTH];
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uchar eh_saddr[IEEE_802_ADDR_LENGTH];
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ushort eh_type;
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} EtherHeader;
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//
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// Structure of a token ring header.
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//
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typedef struct TRHeader {
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uchar tr_ac;
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uchar tr_fc;
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uchar tr_daddr[IEEE_802_ADDR_LENGTH];
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uchar tr_saddr[IEEE_802_ADDR_LENGTH];
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} TRHeader;
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#define ARP_AC 0x10
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#define ARP_FC 0x40
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#define TR_RII 0x80
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typedef struct RC {
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uchar rc_blen; // Broadcast indicator and length.
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uchar rc_dlf; // Direction and largest frame.
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} RC;
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#define RC_DIR 0x80
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#define RC_LENMASK 0x1f
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#define RC_SRBCST 0xc2 // Single route broadcast RC.
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#define RC_BCST_LEN 0x70 // Length for a broadcast.
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#define RC_LF_MASK 0x70 // Mask for length bits.
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// Structure of source routing information.
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typedef struct SRInfo {
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RC sri_rc; // Routing control info.
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ushort sri_rd[1]; // Routing designators.
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} SRInfo;
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#define MAX_RD 8
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//
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// Structure of an FDDI header.
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//
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typedef struct FDDIHeader {
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uchar fh_pri;
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uchar fh_daddr[IEEE_802_ADDR_LENGTH];
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uchar fh_saddr[IEEE_802_ADDR_LENGTH];
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} FDDIHeader;
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#define FDDI_PRI 0x57
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#define FDDI_MSS 4352
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//
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// Structure of a SNAP header.
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//
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typedef struct SNAPHeader {
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uchar sh_dsap;
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uchar sh_ssap;
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uchar sh_ctl;
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uchar sh_protid[3];
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ushort sh_etype;
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} SNAPHeader;
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#define SNAP_SAP 170
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#define SNAP_UI 3
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#define MAX_MEDIA_ETHER sizeof(EtherHeader)
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#define MAX_MEDIA_TR (sizeof(TRHeader)+sizeof(RC)+(MAX_RD*sizeof(ushort))+sizeof(SNAPHeader))
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#define MAX_MEDIA_FDDI (sizeof(FDDIHeader)+sizeof(SNAPHeader))
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#define ETHER_BCAST_MASK 0x01
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#define TR_BCAST_MASK 0x80
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#define FDDI_BCAST_MASK 0x01
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#define ETHER_BCAST_VAL 0x01
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#define TR_BCAST_VAL 0x80
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#define FDDI_BCAST_VAL 0x01
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#define ETHER_BCAST_OFF 0x00
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#define TR_BCAST_OFF FIELD_OFFSET(struct TRHeader, tr_daddr)
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#define FDDI_BCAST_OFF FIELD_OFFSET(struct FDDIHeader, fh_daddr)
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//
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// Lan driver specific information we keep on a per-interface basis.
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//
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typedef struct LanInterface {
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void *ai_context; // Upper layer context info.
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NDIS_HANDLE ai_handle; // NDIS binding handle.
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NDIS_HANDLE ai_unbind; // NDIS unbinding handle.
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KSPIN_LOCK ai_lock; // Lock for this structure.
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PNDIS_PACKET ai_tdpacket; // Transfer Data packet.
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uchar ai_state; // State of the interface.
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int ai_resetting; // Is the interface resetting?
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uint ai_pfilter; // Packet filter for this I/F.
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//
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// Used for calling NdisOpenAdapter and NdisCloseAdapter.
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//
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KEVENT ai_event;
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NDIS_STATUS ai_status;
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NDIS_MEDIUM ai_media; // Media type.
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uchar ai_addr[IEEE_802_ADDR_LENGTH]; // Local HW address.
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uchar ai_addrlen; // Length of ai_addr.
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uchar ai_bcastmask; // Mask for checking unicast.
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uchar ai_bcastval; // Value to check against.
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uchar ai_bcastoff; // Offset in frame to check against.
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uchar ai_hdrsize; // Size of link-level header.
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ushort ai_mtu; // MTU for this interface.
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uint ai_speed; // Speed.
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uint ai_qlen; // Output queue length.
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uint ai_uknprotos; // Unknown protocols received.
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uint ai_inoctets; // Input octets.
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uint ai_inpcount[2]; // Count of packets received.
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uint ai_indiscards; // Input packets discarded.
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uint ai_inerrors; // Input errors.
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uint ai_outoctets; // Output octets.
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uint ai_outpcount[2]; // Count of packets sent.
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uint ai_outdiscards; // Output packets discarded.
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uint ai_outerrors; // Output errors.
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} LanInterface;
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//
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// NOTE: These two values MUST stay at 0 and 1.
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//
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#define AI_UCAST_INDEX 0
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#define AI_NONUCAST_INDEX 1
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// Ether Types
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//
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// Note that the Ether-Type field from classic Ethernet frames coincides
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// in the header with the Length field in IEEE 802.3 frames. This field
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// can be used to distinguish between frame types as valid values for the
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// 802.3 Length field are from 0x0000 to 0x05dc. All valid Ether Types
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// are greater than this. See discussion on p.25 of RFC 1122.
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//
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#define ETYPE_MIN 0x05dd
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#define ETYPE_IPv6 0x86dd
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#endif // LAN_INCLUDED
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