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Length: 2640 (0xa50)
Types: TextFile
Notes: UNIX file
Names: »if_arp.h«
└─⟦8c4f54e61⟧ Bits:30004068/disk2.imd Interactive TCP/IP v.1.2
└─⟦8c4f54e61⟧ UNIX Filesystem
└─⟦this⟧ »hb/new/usr/include/net/if_arp.h«
/*
* Copyright (c) 1986 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*
* @(#)if_arp.h 7.1 (Berkeley) 6/4/86
*/
#ifndef _h_IF_ARP
#define _h_IF_ARP
#ident "@(#)if_arp.h 2.1 - 89/04/21"
/*
* Address Resolution Protocol.
*
* See RFC 826 for protocol description. ARP packets are variable
* in size; the arphdr structure defines the fixed-length portion.
* Protocol type values are the same as those for 10 Mb/s Ethernet.
* It is followed by the variable-sized fields ar_sha, arp_spa,
* arp_tha and arp_tpa in that order, according to the lengths
* specified. Field names used correspond to RFC 826.
*/
struct arphdr {
u_short ar_hrd; /* format of hardware address */
#define ARPHRD_ETHER 1 /* ethernet hardware address */
u_short ar_pro; /* format of protocol address */
u_char ar_hln; /* length of hardware address */
u_char ar_pln; /* length of protocol address */
u_short ar_op; /* one of: */
#define ARPOP_REQUEST 1 /* request to resolve address */
#define ARPOP_REPLY 2 /* response to previous request */
/*
* The remaining fields are variable in size,
* according to the sizes above.
*/
/* u_char ar_sha[]; /* sender hardware address */
/* u_char ar_spa[]; /* sender protocol address */
/* u_char ar_tha[]; /* target hardware address */
/* u_char ar_tpa[]; /* target protocol address */
};
/*
* ARP ioctl request for SIOCSARP, SIOCDARP and SIOCGARP ioctl's
*/
struct arpreq {
struct sockaddr arp_pa; /* protocol address */
struct sockaddr arp_ha; /* hardware address */
int arp_flags; /* flags */
};
/* arp_flags and at_flags field values */
#define ATF_INUSE 0x01 /* entry in use */
#define ATF_COM 0x02 /* completed entry (enaddr valid) */
#define ATF_PERM 0x04 /* permanent entry */
#define ATF_PUBL 0x08 /* publish entry (respond for other host) */
#define ATF_USETRAILERS 0x10 /* set has requested trailers */
#define ATF_LOCAL 0x100 /* address for this host */
/*
* Arp timeout parameter request for SIOCGTIM and SIOCSTIM ioctl's
*/
struct arptimtab {
int arpt_interval; /* interval between timer runs */
int arpt_killcom; /* timeout to kill a complete entry */
int arpt_killinc; /* timeout to kill an incomplete entry*/
};
/*
* Arp indexed table entry request for SIOCGENT ioctl
*/
struct arpent {
int ae_index; /* table index (returns length) */
struct in_addr ae_iaddr; /* internet address */
u_char ae_enaddr[6]; /* ethernet address */
u_char ae_timer; /* minutes since last reference */
u_char ae_flags; /* flags */
};
#endif /* _h_IF_ARP */