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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /*
23: * Copyright (c) 1986, 1993
24: * The Regents of the University of California. All rights reserved.
25: *
26: * Redistribution and use in source and binary forms, with or without
27: * modification, are permitted provided that the following conditions
28: * are met:
29: * 1. Redistributions of source code must retain the above copyright
30: * notice, this list of conditions and the following disclaimer.
31: * 2. Redistributions in binary form must reproduce the above copyright
32: * notice, this list of conditions and the following disclaimer in the
33: * documentation and/or other materials provided with the distribution.
34: * 3. All advertising materials mentioning features or use of this software
35: * must display the following acknowledgement:
36: * This product includes software developed by the University of
37: * California, Berkeley and its contributors.
38: * 4. Neither the name of the University nor the names of its contributors
39: * may be used to endorse or promote products derived from this software
40: * without specific prior written permission.
41: *
42: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
43: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
44: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
45: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
46: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
47: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
48: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
49: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
50: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
51: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52: * SUCH DAMAGE.
53: *
54: * @(#)if_arp.h 8.1 (Berkeley) 6/10/93
55: */
56:
57: #ifndef _NET_IF_ARP_H_
58: #define _NET_IF_ARP_H_
59:
60: /*
61: * Address Resolution Protocol.
62: *
63: * See RFC 826 for protocol description. ARP packets are variable
64: * in size; the arphdr structure defines the fixed-length portion.
65: * Protocol type values are the same as those for 10 Mb/s Ethernet.
66: * It is followed by the variable-sized fields ar_sha, arp_spa,
67: * arp_tha and arp_tpa in that order, according to the lengths
68: * specified. Field names used correspond to RFC 826.
69: */
70: struct arphdr {
71: u_short ar_hrd; /* format of hardware address */
72: #define ARPHRD_ETHER 1 /* ethernet hardware format */
73: #define ARPHRD_FRELAY 15 /* frame relay hardware format */
74: u_short ar_pro; /* format of protocol address */
75: u_char ar_hln; /* length of hardware address */
76: u_char ar_pln; /* length of protocol address */
77: u_short ar_op; /* one of: */
78: #define ARPOP_REQUEST 1 /* request to resolve address */
79: #define ARPOP_REPLY 2 /* response to previous request */
80: #define ARPOP_REVREQUEST 3 /* request protocol address given hardware */
81: #define ARPOP_REVREPLY 4 /* response giving protocol address */
82: #define ARPOP_INVREQUEST 8 /* request to identify peer */
83: #define ARPOP_INVREPLY 9 /* response identifying peer */
84: /*
85: * The remaining fields are variable in size,
86: * according to the sizes above.
87: */
88: #ifdef COMMENT_ONLY
89: u_char ar_sha[]; /* sender hardware address */
90: u_char ar_spa[]; /* sender protocol address */
91: u_char ar_tha[]; /* target hardware address */
92: u_char ar_tpa[]; /* target protocol address */
93: #endif
94: };
95:
96: /*
97: * ARP ioctl request
98: */
99: struct arpreq {
100: struct sockaddr arp_pa; /* protocol address */
101: struct sockaddr arp_ha; /* hardware address */
102: int arp_flags; /* flags */
103: };
104: /* arp_flags and at_flags field values */
105: #define ATF_INUSE 0x01 /* entry in use */
106: #define ATF_COM 0x02 /* completed entry (enaddr valid) */
107: #define ATF_PERM 0x04 /* permanent entry */
108: #define ATF_PUBL 0x08 /* publish entry (respond for other host) */
109: #define ATF_USETRAILERS 0x10 /* has requested trailers */
110:
111:
112: /*
113: * Ethernet multicast address structure. There is one of these for each
114: * multicast address or range of multicast addresses that we are supposed
115: * to listen to on a particular interface. They are kept in a linked list,
116: * rooted in the interface's arpcom structure. (This really has nothing to
117: * do with ARP, or with the Internet address family, but this appears to be
118: * the minimally-disrupting place to put it.)
119: */
120: struct ether_multi {
121: u_char enm_addrlo[6]; /* low or only address of range */
122: u_char enm_addrhi[6]; /* high or only address of range */
123: struct arpcom *enm_ac; /* back pointer to arpcom */
124: u_int enm_refcount; /* no. claims to this addr/range */
125: struct ether_multi *enm_next; /* ptr to next ether_multi */
126: };
127:
128: /*
129: * Structure used by macros below to remember position when stepping through
130: * all of the ether_multi records.
131: */
132: struct ether_multistep {
133: struct ether_multi *e_enm;
134: };
135:
136: #ifdef KERNEL
137: /*
138: * Structure shared between the ethernet driver modules and
139: * the address resolution code. For example, each ec_softc or il_softc
140: * begins with this structure.
141: */
142: struct arpcom {
143: /*
144: * The ifnet struct _must_ be at the head of this structure.
145: */
146: struct ifnet ac_if; /* network-visible interface */
147: u_char ac_enaddr[6]; /* ethernet hardware address */
148: struct in_addr ac_ipaddr; /* copy of ip address- XXX */
149: struct ether_multi *ac_multiaddrs; /* list of ether multicast addrs */
150: int ac_multicnt; /* length of ac_multiaddrs list */
151: };
152:
153: extern u_char etherbroadcastaddr[6];
154: #endif
155:
156: #endif /* !_NET_IF_ARP_H_ */
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