1 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
2 /* All Rights Reserved */
9 /* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
10 /* The copyright notice above does not evidence any */
11 /* actual or intended publication of such source code. */
14 * PROPRIETARY NOTICE (Combined)
16 * This source code is unpublished proprietary information
17 * constituting, or derived under license from AT&T's Unix(r) System V.
18 * In addition, portions of such source code were derived from Berkeley
19 * 4.3 BSD under license from the Regents of the University of
26 * Notice of copyright on this source code product does not indicate
29 * (c) 1986,1987,1988,1989 Sun Microsystems, Inc.
30 * (c) 1983,1984,1985,1986,1987,1988,1989 AT&T.
31 * All rights reserved.
34 #ifndef _NETINET_ARP_H
35 #define _NETINET_ARP_H
41 #include <sys/socket.h>
42 #include <sys/types.h>
43 #include <libc/netinet/net_types.h>
45 Address Resolution Protocol.
47 See RFC 826 for protocol description. ARP packets are variable
48 in size; the arphdr structure defines the fixed-length portion.
49 Protocol type values are the same as those for 10 Mb/s Ethernet.
50 It is followed by the variable-sized fields ar_sha, arp_spa,
51 arp_tha and arp_tpa in that order, according to the lengths
52 specified. Field names used correspond to RFC 826.
55 u_short ar_hrd; /* format of hardware address */
56 #define ARPHRD_ETHER 1 /* ethernet hardware address */
57 u_short ar_pro; /* format of protocol address */
58 u_char ar_hln; /* length of hardware address */
59 u_char ar_pln; /* length of protocol address */
60 u_short ar_op; /* one of: */
61 #define ARPOP_REQUEST 1 /* request to resolve address */
62 #define ARPOP_REPLY 2 /* response to previous request */
63 #define REVARP_REQUEST 3 /* Reverse ARP request */
64 #define REVARP_REPLY 4 /* Reverse ARP reply */
66 * The remaining fields are variable in size,
67 * according to the sizes above, and are defined
68 * as appropriate for specific hardware/protocol
69 * combinations. (E.g., see <netinet/if_ether.h>.)
72 u_char ar_sha[]; /* sender hardware address */
73 u_char ar_spa[]; /* sender protocol address */
74 u_char ar_tha[]; /* target hardware address */
75 u_char ar_tpa[]; /* target protocol address */
80 Ethernet Address Resolution Protocol.
82 See RFC 826 for protocol description. Structure below is adapted
83 to resolving internet addresses. Field names used correspond to
87 struct arphdr ea_hdr; /* fixed-size header */
88 struct ether_addr arp_sha; /* sender hardware address */
89 u_char arp_spa[4]; /* sender protocol address */
90 struct ether_addr arp_tha; /* target hardware address */
91 u_char arp_tpa[4]; /* target protocol address */
98 struct sockaddr arp_pa; /* protocol address */
99 struct sockaddr arp_ha; /* hardware address */
100 int arp_flags; /* flags */
108 #endif /* _NETINET_ARP_H */