| /* 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 _LINUX_IF_ARCNET_H |
| #define _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 0xDD |
| |
| /* 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 /* _LINUX_IF_ARCNET_H */ |