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if_inarp.h revision 1.25.2.1 
      1 /*	$NetBSD: if_inarp.h,v 1.25.2.1 1997/02/07 18:08:59 is Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1982, 1986, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  *	@(#)if_ether.h	8.1 (Berkeley) 6/10/93
     36  */
     37 
     38 /*
     39  * Ethernet Address Resolution Protocol.
     40  *
     41  * See RFC 826 for protocol description.  Structure below is adapted
     42  * to resolving internet addresses.  Field names used correspond to
     43  * RFC 826.
     44  */
     45 struct	ether_arp {
     46 	struct	 arphdr ea_hdr;			/* fixed-size header */
     47 	u_int8_t arp_sha[ETHER_ADDR_LEN];	/* sender hardware address */
     48 	u_int8_t arp_spa[4];			/* sender protocol address */
     49 	u_int8_t arp_tha[ETHER_ADDR_LEN];	/* target hardware address */
     50 	u_int8_t arp_tpa[4];			/* target protocol address */
     51 };
     52 #define	arp_hrd	ea_hdr.ar_hrd
     53 #define	arp_pro	ea_hdr.ar_pro
     54 #define	arp_hln	ea_hdr.ar_hln
     55 #define	arp_pln	ea_hdr.ar_pln
     56 #define	arp_op	ea_hdr.ar_op
     57 
     58 struct llinfo_arp {
     59 	LIST_ENTRY(llinfo_arp) la_list;
     60 	struct	rtentry *la_rt;
     61 	struct	mbuf *la_hold;		/* last packet until resolved/timeout */
     62 	long	la_asked;		/* last time we QUERIED for this addr */
     63 #define la_timer la_rt->rt_rmx.rmx_expire /* deletion time in seconds */
     64 };
     65 
     66 struct sockaddr_inarp {
     67 	u_int8_t  sin_len;
     68 	u_int8_t  sin_family;
     69 	u_int16_t sin_port;
     70 	struct	  in_addr sin_addr;
     71 	struct	  in_addr sin_srcaddr;
     72 	u_int16_t sin_tos;
     73 	u_int16_t sin_other;
     74 #define SIN_PROXY 1
     75 };
     76 
     77 /*
     78  * IP and ethernet specific routing flags
     79  */
     80 #define	RTF_USETRAILERS	RTF_PROTO1	/* use trailers */
     81 #define	RTF_ANNOUNCE	RTF_PROTO2	/* announce new arp entry */
     82 
     83 #ifdef	_KERNEL
     84 struct	ifqueue arpintrq;
     85 
     86 void	arpwhohas __P((struct ifnet *, struct in_addr *));
     87 void	arpintr __P((void));
     88 int	arpresolve __P((struct ifnet *,
     89 	    struct rtentry *, struct mbuf *, struct sockaddr *, u_char *));
     90 void	arp_ifinit __P((struct ifnet *, struct ifaddr *));
     91 void	arp_rtrequest __P((int, struct rtentry *, struct sockaddr *));
     92 
     93 #endif /* _KERNEL */
     94 
     95 #ifdef _KERNEL
     96 void arp_rtrequest __P((int, struct rtentry *, struct sockaddr *));
     97 int arpresolve __P((struct ifnet *, struct rtentry *, struct mbuf *,
     98 		    struct sockaddr *, u_char *));
     99 void arpintr __P((void));
    100 int arpioctl __P((u_long, caddr_t));
    101 void arp_ifinit __P((struct ifnet *, struct ifaddr *));
    102 void revarpinput __P((struct mbuf *));
    103 void in_revarpinput __P((struct mbuf *));
    104 void revarprequest __P((struct ifnet *));
    105 int revarpwhoarewe __P((struct ifnet *, struct in_addr *, struct in_addr *));
    106 int revarpwhoami __P((struct in_addr *, struct ifnet *));
    107 int db_show_arptab __P((void));
    108 #endif
    109