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eui64.h
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#include "ppp_opts.h"
39#if PPP_SUPPORT && PPP_IPV6_SUPPORT /* don't build if not configured for use in ppp_opts.h */
40
41#ifndef EUI64_H
42#define EUI64_H
43
44#ifdef __cplusplus
45extern "C" {
46#endif
47
48/*
49 * @todo:
50 *
51 * Maybe this should be done by processing struct in6_addr directly...
52 */
53typedef union
54{
55 u8_t e8[8];
56 u16_t e16[4];
57 u32_t e32[2];
58} eui64_t;
59
60#define eui64_iszero(e) (((e).e32[0] | (e).e32[1]) == 0)
61#define eui64_equals(e, o) (((e).e32[0] == (o).e32[0]) && \
62 ((e).e32[1] == (o).e32[1]))
63#define eui64_zero(e) (e).e32[0] = (e).e32[1] = 0;
64
65#define eui64_copy(s, d) memcpy(&(d), &(s), sizeof(eui64_t))
66
67#define eui64_magic(e) do { \
68 (e).e32[0] = magic(); \
69 (e).e32[1] = magic(); \
70 (e).e8[0] &= ~2; \
71 } while (0)
72#define eui64_magic_nz(x) do { \
73 eui64_magic(x); \
74 } while (eui64_iszero(x))
75#define eui64_magic_ne(x, y) do { \
76 eui64_magic(x); \
77 } while (eui64_equals(x, y))
78
79#define eui64_get(ll, cp) do { \
80 eui64_copy((*cp), (ll)); \
81 (cp) += sizeof(eui64_t); \
82 } while (0)
83
84#define eui64_put(ll, cp) do { \
85 eui64_copy((ll), (*cp)); \
86 (cp) += sizeof(eui64_t); \
87 } while (0)
88
89#define eui64_set32(e, l) do { \
90 (e).e32[0] = 0; \
91 (e).e32[1] = ppp_htonl(l); \
92 } while (0)
93#define eui64_setlo32(e, l) eui64_set32(e, l)
94
95char *eui64_ntoa(eui64_t); /* Returns ascii representation of id */
96
97#ifdef __cplusplus
98}
99#endif
100
101#endif /* EUI64_H */
102#endif /* PPP_SUPPORT && PPP_IPV6_SUPPORT */