1/*
2 * eui64.h - EUI64 routines for IPv6CP.
3 *
4 * Copyright (c) 1999 Tommi Komulainen.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in
15 *    the documentation and/or other materials provided with the
16 *    distribution.
17 *
18 * 3. The name(s) of the authors of this software must not be used to
19 *    endorse or promote products derived from this software without
20 *    prior written permission.
21 *
22 * 4. Redistributions of any form whatsoever must retain the following
23 *    acknowledgment:
24 *    "This product includes software developed by Tommi Komulainen
25 *     <Tommi.Komulainen@iki.fi>".
26 *
27 * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
28 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
29 * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
30 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
31 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
32 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
33 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
34 *
35 * $Id: eui64.h,v 1.6 2002/12/04 23:03:32 paulus Exp $
36*/
37
38#ifndef __EUI64_H__
39#define __EUI64_H__
40
41#if !defined(INET6)
42#error	"this file should only be included when INET6 is defined"
43#endif /* not defined(INET6) */
44
45#if defined(SOL2)
46#include <netinet/in.h>
47
48typedef union {
49    uint8_t	e8[8];		/* lower 64-bit IPv6 address */
50    uint32_t	e32[2];		/* lower 64-bit IPv6 address */
51} eui64_t;
52
53/*
54 * Declare the two below, since in.h only defines them when _KERNEL
55 * is declared - which shouldn't be true when dealing with user-land programs
56 */
57#define	s6_addr8	_S6_un._S6_u8
58#define	s6_addr32	_S6_un._S6_u32
59
60#else /* else if not defined(SOL2) */
61
62/*
63 * TODO:
64 *
65 * Maybe this should be done by processing struct in6_addr directly...
66 */
67typedef union
68{
69    u_int8_t e8[8];
70    u_int16_t e16[4];
71    u_int32_t e32[2];
72} eui64_t;
73
74#endif /* defined(SOL2) */
75
76#define eui64_iszero(e)		(((e).e32[0] | (e).e32[1]) == 0)
77#define eui64_equals(e, o)	(((e).e32[0] == (o).e32[0]) && \
78				((e).e32[1] == (o).e32[1]))
79#define eui64_zero(e)		(e).e32[0] = (e).e32[1] = 0;
80
81#define eui64_copy(s, d)	memcpy(&(d), &(s), sizeof(eui64_t))
82
83#define eui64_magic(e)		do {			\
84				(e).e32[0] = magic();	\
85				(e).e32[1] = magic();	\
86				(e).e8[0] &= ~2;	\
87				} while (0)
88#define eui64_magic_nz(x)	do {				\
89				eui64_magic(x);			\
90				} while (eui64_iszero(x))
91#define eui64_magic_ne(x, y)	do {				\
92				eui64_magic(x);			\
93				} while (eui64_equals(x, y))
94
95#define eui64_get(ll, cp)	do {				\
96				eui64_copy((*cp), (ll));	\
97				(cp) += sizeof(eui64_t);	\
98				} while (0)
99
100#define eui64_put(ll, cp)	do {				\
101				eui64_copy((ll), (*cp));	\
102				(cp) += sizeof(eui64_t);	\
103				} while (0)
104
105#define eui64_set32(e, l)	do {			\
106				(e).e32[0] = 0;		\
107				(e).e32[1] = htonl(l);	\
108				} while (0)
109#define eui64_setlo32(e, l)	eui64_set32(e, l)
110
111char *eui64_ntoa __P((eui64_t));	/* Returns ascii representation of id */
112
113#endif /* __EUI64_H__ */
114
115