d31da7e5592e614c4deb51c6bacf5e54533bd89c
[ppp.git] / pppd / eui64.h
1 /*
2     eui64.h - EUI64 routines for IPv6CP.
3     Copyright (C) 1999  Tommi Komulainen <Tommi.Komulainen@iki.fi>
4
5     This program is free software; you can redistribute it and/or modify
6     it under the terms of the GNU General Public License as published by
7     the Free Software Foundation; either version 2 of the License, or
8     (at your option) any later version.
9
10     This program is distributed in the hope that it will be useful,
11     but WITHOUT ANY WARRANTY; without even the implied warranty of
12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13     GNU General Public License for more details.
14
15     You should have received a copy of the GNU General Public License
16     along with this program; if not, write to the Free Software
17     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18
19     
20     $Id: eui64.h,v 1.3 1999/09/30 19:56:37 masputra Exp $
21 */
22
23 #ifndef __EUI64_H__
24 #define __EUI64_H__
25
26 #if !defined(INET6)
27 #error  "this file should only be included when INET6 is defined"
28 #endif /* not defined(INET6) */
29
30 #if defined(SOL2)
31 #include <netinet/in.h>
32
33 typedef union {
34     uint8_t     e8[8];          /* lower 64-bit IPv6 address */
35     uint32_t    e32[2];         /* lower 64-bit IPv6 address */
36 } eui64_t;
37
38 /*
39  * Declare the two below, since in.h only defines them when _KERNEL
40  * is declared - which shouldn't be true when dealing with user-land programs
41  */
42 #define s6_addr8        _S6_un._S6_u8
43 #define s6_addr32       _S6_un._S6_u32
44
45 #else /* else if not defined(SOL2) */
46
47 /*
48  * TODO:
49  *
50  * Maybe this should be done by processing struct in6_addr directly...
51  */
52 typedef union
53 {
54     u_int8_t e8[8];
55     u_int16_t e16[4];
56     u_int32_t e32[2];
57 } eui64_t;
58
59 #endif /* defined(SOL2) */
60
61 #define eui64_iszero(e)         (((e).e32[0] | (e).e32[1]) == 0)
62 #define eui64_equals(e, o)      (((e).e32[0] == (o).e32[0]) && \
63                                 ((e).e32[1] == (o).e32[1]))
64 #define eui64_zero(e)           (e).e32[0] = (e).e32[1] = 0;
65
66 #define eui64_copy(s, d)        memcpy(&(d), &(s), sizeof(eui64_t))
67
68 #define eui64_magic(e)          do {                    \
69                                 (e).e32[0] = magic();   \
70                                 (e).e32[1] = magic();   \
71                                 (e).e8[0] &= ~2;        \
72                                 } while (0)
73 #define eui64_magic_nz(x)       do {                            \
74                                 eui64_magic(x);                 \
75                                 } while (eui64_iszero(x))
76 #define eui64_magic_ne(x, y)    do {                            \
77                                 eui64_magic(x);                 \
78                                 } while (eui64_equals(x, y))
79
80 #define eui64_get(ll, cp)       do {                            \
81                                 eui64_copy((*cp), (ll));        \
82                                 (cp) += sizeof(eui64_t);        \
83                                 } while (0)
84
85 #define eui64_put(ll, cp)       do {                            \
86                                 eui64_copy((ll), (*cp));        \
87                                 (cp) += sizeof(eui64_t);        \
88                                 } while (0)
89
90 #define eui64_set32(e, l)       do {                    \
91                                 (e).e32[0] = 0;         \
92                                 (e).e32[1] = htonl(l);  \
93                                 } while (0)
94 #define eui64_setlo32(e, l)     eui64_set32(e, l)
95
96 char *eui64_ntoa __P((eui64_t));        /* Returns ascii representation of id */
97
98 #endif /* __EUI64_H__ */
99