if_ether.h

VRTX 商用嵌入式实时操作系统

/***************************************************************************
*
*               Copyright (c) 1993 READY SYSTEMS CORPORATION.
*
*       All rights reserved. READY SYSTEMS' source code is an unpublished
*       work and the use of a copyright notice does not imply otherwise.
*       This source code contains confidential, trade secret material of
*       READY SYSTEMS. Any attempt or participation in deciphering, decoding,
*       reverse engineering or in any way altering the source code is
*       strictly prohibited, unless the prior written consent of
*       READY SYSTEMS is obtained.
*
*
*       Module Name:            if_ether.h
*
*       Identification:         @(#) 1.3 if_ether.h
*
*       Date:                   1/6/94  16:36:21
*
****************************************************************************
*/

/*
 RCS header identifier - if_ether.h,v 1.2 1995/01/05 16:32:18 sriram Exp
*/
/*
 * Copyrighted as an unpublished work.
 * (c) Copyright 1987-1993 Lachman Technology, Incorporated
 * All rights reserved.
 * 
 * RESTRICTED RIGHTS
 * 
 * These programs are supplied under a license.  They may be used,
 * disclosed, and/or copied only as permitted under such license
 * agreement.  Any copy must contain the above copyright notice and
 * this restricted rights notice.  Use, copying, and/or disclosure
 * of the programs is strictly prohibited unless otherwise provided
 * in the license agreement.
 */
/*
 * Copyright (c) 1985 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef if_ether_h
#define if_ether_h

#ifdef __cplusplus
extern "C" {
#endif

/* if_ether.h	6.2	83/09/26	 */

/*
 * Structure of a 10Mb/s Ethernet header. 
 */
struct ether_header {
	u_char          ether_dhost[6];
	u_char          ether_shost[6];
	u_short         ether_type;
};

#define	ETHERTYPE_PUP	0x0200	/* PUP protocol */
#define	ETHERTYPE_IP	0x0800	/* IP protocol */
#define ETHERTYPE_ARP	0x0806	/* Addr. resolution protocol */

/*
 * The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have
 * (type-ETHERTYPE_TRAIL)*512 bytes of data followed by an ETHER type (as
 * given above) and then the (variable-length) header. 
 */
#define	ETHERTYPE_TRAIL		0x1000	/* Trailer packet */
#define	ETHERTYPE_NTRAILER	16

#define	ETHERMTU	1500
#define	ETHERMIN	64

/*
 * Ethernet Address Resolution Protocol. 
 *
 * See RFC 826 for protocol description.  Structure below is adapted to
 * resolving internet addresses.  Field names used correspond to RFC 826. 
 */
struct ether_arp {
	struct arphdr   ea_hdr;	/* fixed-size header */
	u_char          arp_sha[6];	/* sender hardware address */
	u_char          arp_spa[4];	/* sender protocol address */
	u_char          arp_tha[6];	/* target hardware address */
	u_char          arp_tpa[4];	/* target protocol address */
};
#define	arp_hrd	ea_hdr.ar_hrd
#define	arp_pro	ea_hdr.ar_pro
#define	arp_hln	ea_hdr.ar_hln
#define	arp_pln	ea_hdr.ar_pln
#define	arp_op	ea_hdr.ar_op


/*
 * Structure shared between the arp processor module and the address
 * resolution code.  
 */
struct arpcom {
	int             ac_ifflags;	/* IP interface flags */
	u_char          ac_enaddr[6];	/* ethernet hardware address */
	struct in_addr  ac_ipaddr;	/* IP address */
	int             ac_mintu;	/* minimum transfer unit */
	int		ac_addrlen;	/* length of address */
};


/*
 * Internet to ethernet address resolution table. 
 */
struct arptab {
	struct in_addr  at_iaddr;	/* internet address */
	u_char          at_enaddr[6];	/* ethernet address */
	u_char          at_timer;	/* minutes since last reference */
	u_char          at_flags;	/* flags */
	mblk_t          *at_hold;/* last packet until resolved/timeout */
};

#ifdef __cplusplus
}
#endif

#endif				/* if_ether_h */