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The C and C++ Include Header Files

/usr/include/netinet/if_ether.h


$ cat -n /usr/include/netinet/if_ether.h

     1	/* Copyright (C) 1996-2024 Free Software Foundation, Inc.
     2	   This file is part of the GNU C Library.
     3	
     4	   The GNU C Library is free software; you can redistribute it and/or
     5	   modify it under the terms of the GNU Lesser General Public
     6	   License as published by the Free Software Foundation; either
     7	   version 2.1 of the License, or (at your option) any later version.
     8	
     9	   The GNU C Library is distributed in the hope that it will be useful,
    10	   but WITHOUT ANY WARRANTY; without even the implied warranty of
    11	   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    12	   Lesser General Public License for more details.
    13	
    14	   You should have received a copy of the GNU Lesser General Public
    15	   License along with the GNU C Library; if not, see
    16	   <https://www.gnu.org/licenses/>.  */
    17	
    18	#ifndef __NETINET_IF_ETHER_H
    19	
    20	#define __NETINET_IF_ETHER_H	1
    21	#include <features.h>
    22	#include <sys/types.h>
    23	
    24	/* Get definitions from kernel header file.  */
    25	#include <linux/if_ether.h>
    26	
    27	#ifdef __USE_MISC
    28	/*
    29	 * Copyright (c) 1982, 1986, 1993
    30	 *	The Regents of the University of California.  All rights reserved.
    31	 *
    32	 * Redistribution and use in source and binary forms, with or without
    33	 * modification, are permitted provided that the following conditions
    34	 * are met:
    35	 * 1. Redistributions of source code must retain the above copyright
    36	 *    notice, this list of conditions and the following disclaimer.
    37	 * 2. Redistributions in binary form must reproduce the above copyright
    38	 *    notice, this list of conditions and the following disclaimer in the
    39	 *    documentation and/or other materials provided with the distribution.
    40	 * 4. Neither the name of the University nor the names of its contributors
    41	 *    may be used to endorse or promote products derived from this software
    42	 *    without specific prior written permission.
    43	 *
    44	 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
    45	 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    46	 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    47	 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
    48	 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    49	 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
    50	 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    51	 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
    52	 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
    53	 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    54	 * SUCH DAMAGE.
    55	 *
    56	 *	@(#)if_ether.h	8.3 (Berkeley) 5/2/95
    57	 *	$FreeBSD$
    58	 */
    59	
    60	#include <net/ethernet.h>
    61	#include <net/if_arp.h>
    62	
    63	__BEGIN_DECLS
    64	/*
    65	 * Ethernet Address Resolution Protocol.
    66	 *
    67	 * See RFC 826 for protocol description.  Structure below is adapted
    68	 * to resolving internet addresses.  Field names used correspond to
    69	 * RFC 826.
    70	 */
    71	struct	ether_arp {
    72		struct	arphdr ea_hdr;		/* fixed-size header */
    73		uint8_t arp_sha[ETH_ALEN];	/* sender hardware address */
    74		uint8_t arp_spa[4];		/* sender protocol address */
    75		uint8_t arp_tha[ETH_ALEN];	/* target hardware address */
    76		uint8_t arp_tpa[4];		/* target protocol address */
    77	};
    78	#define	arp_hrd	ea_hdr.ar_hrd
    79	#define	arp_pro	ea_hdr.ar_pro
    80	#define	arp_hln	ea_hdr.ar_hln
    81	#define	arp_pln	ea_hdr.ar_pln
    82	#define	arp_op	ea_hdr.ar_op
    83	
    84	/*
    85	 * Macro to map an IP multicast address to an Ethernet multicast address.
    86	 * The high-order 25 bits of the Ethernet address are statically assigned,
    87	 * and the low-order 23 bits are taken from the low end of the IP address.
    88	 */
    89	#define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \
    90		/* struct in_addr *ipaddr; */ \
    91		/* uint8_t enaddr[ETH_ALEN]; */ \
    92	{ \
    93		(enaddr)[0] = 0x01; \
    94		(enaddr)[1] = 0x00; \
    95		(enaddr)[2] = 0x5e; \
    96		(enaddr)[3] = ((uint8_t *)ipaddr)[1] & 0x7f; \
    97		(enaddr)[4] = ((uint8_t *)ipaddr)[2]; \
    98		(enaddr)[5] = ((uint8_t *)ipaddr)[3]; \
    99	}
   100	
   101	__END_DECLS
   102	#endif /* __USE_MISC */
   103	
   104	#endif /* netinet/if_ether.h */