The C and C++ Include Header Files

/usr/include/linux/if_arcnet.h


$ cat -n /usr/include/linux/if_arcnet.h

     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	 */
    59	struct 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[];	/* space remaining in packet (504 bytes)*/
    64	};
    65	#define RFC1201_HDR_SIZE 4
    66	
    67	/*
    68	 * The RFC1051-specific components.
    69	 */
    70	struct arc_rfc1051 {
    71		__u8 proto;		/* ARC_P_RFC1051_ARP/RFC1051_IP	*/
    72		__u8 payload[];	/* 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	 */
    80	struct arc_eth_encap {
    81		__u8 proto;		/* Always ARC_P_ETHER			*/
    82		struct ethhdr eth;	/* standard ethernet header (yuck!)	*/
    83		__u8 payload[];	/* 493 bytes				*/
    84	};
    85	#define ETH_ENCAP_HDR_SIZE 14
    86	
    87	struct 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	 */
   105	struct 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	 */
   116	struct 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 */