/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
* INET An implementation of the TCP / IP protocol suite for the LINUX
* operating system . INET is implemented using the BSD Socket
* interface as the means of communication with the user level .
*
* Global definitions for the ARCnet interface .
*
* Authors : David Woodhouse and Avery Pennarun
*
* This program is free software ; you can redistribute it and / or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation ; either version
* 2 of the License , or ( at your option ) any later version .
*/
#ifndef _UAPI_LINUX_IF_ARCNET_H
#define _UAPI_LINUX_IF_ARCNET_H
#include <linux/types.h>
#include <linux/if_ether.h>
/*
* These are the defined ARCnet Protocol ID ' s .
*/
/* CAP mode */
/* No macro but uses 1-8 */
/* RFC1201 Protocol ID's */
#define ARC_P_IP 212 /* 0xD4 */
#define ARC_P_IPV6 196 /* 0xC4: RFC2497 */
#define ARC_P_ARP 213 /* 0xD5 */
#define ARC_P_RARP 214 /* 0xD6 */
#define ARC_P_IPX 250 /* 0xFA */
#define ARC_P_NOVELL_EC 236 /* 0xEC */
/* Old RFC1051 Protocol ID's */
#define ARC_P_IP_RFC1051 240 /* 0xF0 */
#define ARC_P_ARP_RFC1051 241 /* 0xF1 */
/* MS LanMan/WfWg "NDIS" encapsulation */
#define ARC_P_ETHER 232 /* 0xE8 */
/* Unsupported/indirectly supported protocols */
#define ARC_P_DATAPOINT_BOOT 0 /* very old Datapoint equipment */
#define ARC_P_DATAPOINT_MOUNT 1
#define ARC_P_POWERLAN_BEACON 8 /* Probably ATA-Netbios related */
#define ARC_P_POWERLAN_BEACON2 243 /* 0xF3 */
#define ARC_P_LANSOFT 251 /* 0xFB - what is this? */
#define ARC_P_ATALK 0 xDD
/* Hardware address length */
#define ARCNET_ALEN 1
/*
* The RFC1201 - specific components of an arcnet packet header .
*/
struct arc_rfc1201 {
__u8 proto; /* protocol ID field - varies */
__u8 split_flag; /* for use with split packets */
__be16 sequence; /* sequence number */
__u8 payload[]; /* space remaining in packet (504 bytes)*/
};
#define RFC1201_HDR_SIZE 4
/*
* The RFC1051 - specific components .
*/
struct arc_rfc1051 {
__u8 proto; /* ARC_P_RFC1051_ARP/RFC1051_IP */
__u8 payload[]; /* 507 bytes */
};
#define RFC1051_HDR_SIZE 1
/*
* The ethernet - encap - specific components . We have a real ethernet header
* and some data .
*/
struct arc_eth_encap {
__u8 proto; /* Always ARC_P_ETHER */
struct ethhdr eth; /* standard ethernet header (yuck!) */
__u8 payload[]; /* 493 bytes */
};
#define ETH_ENCAP_HDR_SIZE 14
struct arc_cap {
__u8 proto;
__u8 cookie[sizeof (int )];
/* Actually NOT sent over the network */
union {
__u8 ack;
__u8 raw[0 ]; /* 507 bytes */
} mes;
};
/*
* The data needed by the actual arcnet hardware .
*
* Now , in the real arcnet hardware , the third and fourth bytes are the
* ' offset ' specification instead of the length , and the soft data is at
* the _ end_ of the 512 - byte buffer . We hide this complexity inside the
* driver .
*/
struct arc_hardware {
__u8 source; /* source ARCnet - filled in automagically */
__u8 dest; /* destination ARCnet - 0 for broadcast */
__u8 offset[2 ]; /* offset bytes (some weird semantics) */
};
#define ARC_HDR_SIZE 4
/*
* This is an ARCnet frame header , as seen by the kernel ( and userspace ,
* when you do a raw packet capture ) .
*/
struct archdr {
/* hardware requirements */
struct arc_hardware hard;
/* arcnet encapsulation-specific bits */
union {
struct arc_rfc1201 rfc1201;
struct arc_rfc1051 rfc1051;
struct arc_eth_encap eth_encap;
struct arc_cap cap;
__u8 raw[0 ]; /* 508 bytes */
} soft;
};
#endif /* _UAPI_LINUX_IF_ARCNET_H */
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