cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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if_arcnet.h (3717B)

      1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
      2/*
      3 * INET         An implementation of the TCP/IP protocol suite for the LINUX
      4 *              operating system.  INET is implemented using the  BSD Socket
      5 *              interface as the means of communication with the user level.
      6 *
      7 *              Global definitions for the ARCnet interface.
      8 *
      9 * Authors:     David Woodhouse and Avery Pennarun
     10 *
     11 *              This program is free software; you can redistribute it and/or
     12 *              modify it under the terms of the GNU General Public License
     13 *              as published by the Free Software Foundation; either version
     14 *              2 of the License, or (at your option) any later version.
     15 */
     16
     17#ifndef _LINUX_IF_ARCNET_H
     18#define _LINUX_IF_ARCNET_H
     19
     20#include <linux/types.h>
     21#include <linux/if_ether.h>
     22
     23/*
     24 *    These are the defined ARCnet Protocol ID's.
     25 */
     26
     27/* CAP mode */
     28/* No macro but uses 1-8 */
     29
     30/* RFC1201 Protocol ID's */
     31#define ARC_P_IP		212	/* 0xD4 */
     32#define ARC_P_IPV6		196	/* 0xC4: RFC2497 */
     33#define ARC_P_ARP		213	/* 0xD5 */
     34#define ARC_P_RARP		214	/* 0xD6 */
     35#define ARC_P_IPX		250	/* 0xFA */
     36#define ARC_P_NOVELL_EC		236	/* 0xEC */
     37
     38/* Old RFC1051 Protocol ID's */
     39#define ARC_P_IP_RFC1051	240	/* 0xF0 */
     40#define ARC_P_ARP_RFC1051	241	/* 0xF1 */
     41
     42/* MS LanMan/WfWg "NDIS" encapsulation */
     43#define ARC_P_ETHER		232	/* 0xE8 */
     44
     45/* Unsupported/indirectly supported protocols */
     46#define ARC_P_DATAPOINT_BOOT	0	/* very old Datapoint equipment */
     47#define ARC_P_DATAPOINT_MOUNT	1
     48#define ARC_P_POWERLAN_BEACON	8	/* Probably ATA-Netbios related */
     49#define ARC_P_POWERLAN_BEACON2	243	/* 0xF3 */
     50#define ARC_P_LANSOFT		251	/* 0xFB - what is this? */
     51#define ARC_P_ATALK		0xDD
     52
     53/* Hardware address length */
     54#define ARCNET_ALEN	1
     55
     56/*
     57 * The RFC1201-specific components of an arcnet packet header.
     58 */
     59struct arc_rfc1201 {
     60	__u8  proto;		/* protocol ID field - varies		*/
     61	__u8  split_flag;	/* for use with split packets		*/
     62	__be16   sequence;	/* sequence number			*/
     63	__u8  payload[0];	/* space remaining in packet (504 bytes)*/
     64};
     65#define RFC1201_HDR_SIZE 4
     66
     67/*
     68 * The RFC1051-specific components.
     69 */
     70struct arc_rfc1051 {
     71	__u8 proto;		/* ARC_P_RFC1051_ARP/RFC1051_IP	*/
     72	__u8 payload[0];	/* 507 bytes			*/
     73};
     74#define RFC1051_HDR_SIZE 1
     75
     76/*
     77 * The ethernet-encap-specific components.  We have a real ethernet header
     78 * and some data.
     79 */
     80struct arc_eth_encap {
     81	__u8 proto;		/* Always ARC_P_ETHER			*/
     82	struct ethhdr eth;	/* standard ethernet header (yuck!)	*/
     83	__u8 payload[0];	/* 493 bytes				*/
     84};
     85#define ETH_ENCAP_HDR_SIZE 14
     86
     87struct arc_cap {
     88	__u8 proto;
     89	__u8 cookie[sizeof(int)];
     90				/* Actually NOT sent over the network */
     91	union {
     92		__u8 ack;
     93		__u8 raw[0];	/* 507 bytes */
     94	} mes;
     95};
     96
     97/*
     98 * The data needed by the actual arcnet hardware.
     99 *
    100 * Now, in the real arcnet hardware, the third and fourth bytes are the
    101 * 'offset' specification instead of the length, and the soft data is at
    102 * the _end_ of the 512-byte buffer.  We hide this complexity inside the
    103 * driver.
    104 */
    105struct arc_hardware {
    106	__u8 source;		/* source ARCnet - filled in automagically */
    107	__u8 dest;		/* destination ARCnet - 0 for broadcast    */
    108	__u8 offset[2];		/* offset bytes (some weird semantics)     */
    109};
    110#define ARC_HDR_SIZE 4
    111
    112/*
    113 * This is an ARCnet frame header, as seen by the kernel (and userspace,
    114 * when you do a raw packet capture).
    115 */
    116struct archdr {
    117	/* hardware requirements */
    118	struct arc_hardware hard;
    119
    120	/* arcnet encapsulation-specific bits */
    121	union {
    122		struct arc_rfc1201   rfc1201;
    123		struct arc_rfc1051   rfc1051;
    124		struct arc_eth_encap eth_encap;
    125		struct arc_cap       cap;
    126		__u8 raw[0];	/* 508 bytes				*/
    127	} soft;
    128};
    129
    130#endif				/* _LINUX_IF_ARCNET_H */