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    Length: 3166 (0xc5e)
    Types: TextFile
    Notes: UNIX file
    Names: »if_ether.h«

└─⟦8c4f54e61⟧ Bits:30004068/disk2.imd Interactive TCP/IP v.1.2
└─⟦8c4f54e61⟧ UNIX Filesystem
    └─⟦this⟧ »hb/new/usr/include/netinet/if_ether.h« 

TextFile

/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *	@(#)if_ether.h	2.1 - 89/04/21
 */

#ifndef _h_IF_ETHER
#define _h_IF_ETHER
#ident "@(#)if_ether.h	2.1 - 89/04/21"

/*
 *	Arp structure for a stream device
 */
struct	arpdev {
    queue_t *arp_qptr;		/* stream write queue */
    queue_t *arp_ipq;		/* ip queue for other side */
    queue_t *arp_arpq;		/* arp queue for other side */
    u_long  arp_state;		/* stream state */
    u_long  arp_flags;		/* stream flags */
    u_long  arp_sap;		/* stream sap */
    int	    arp_subtype;	/* subnetwork types */
    int     arp_index;		/* index from I_LINK (if linked) */
    struct  in_addr arp_inaddr;	/* internet address */
    u_char  arp_enaddr[6];	/* ethernet address */
};

/* address that comes down from IP */
#define IP_ADDR_LEN	4
#define IP_FAM_LEN	2
#define IP_INDADDR_LEN	(IP_ADDR_LEN + IP_FAM_LEN)

#define ARP_LSAP_LEN	4
#define LSAP_ADDR_LEN	(IP_ADDR_LEN + ARP_LSAP_LEN)

#define ETHER_ADDR_LEN	6
#define ETHERTYPE_LEN	2
#define ARP_LEN		(ETHER_ADDR_LEN + ETHERTYPE_LEN)

#ifdef DEBUG
#define ARPDEBUG
#endif

#define ARPHIWAT	0x4000
#define ARPLOWAT	0x2000
#define MAXARPSZ	1500

/*
 * 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 */

#define	ETHERMTU	1500
#define	ETHERMIN	(60-14)

/*
 * 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

#ifdef undef
/*
 * Structure shared between the ethernet driver modules and
 * the address resolution code.  For example, each ec_softc or il_softc
 * begins with this structure.
 */
struct	arpcom {
	struct 	ifnet ac_if;		/* network-visible interface */
	u_char	ac_enaddr[6];		/* ethernet hardware address */
	struct in_addr ac_ipaddr;	/* copy of ip address- XXX */
};
#endif

/*
 * 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 */
	queue_t *at_hq;			/* queue last packet was received on */
};

#ifdef	KERNEL
/* extern u_char etherbroadcastaddr[6]; */
extern struct	arptab *arptnew();
extern char *ether_sprintf();
#endif
#endif /* _h_IF_ETHER */