ipv6.h revision 258945 
1/*
2 * Copyright (C) 2004, 2005, 2007  Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 1999-2002  Internet Software Consortium.
4 *
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
16 */
17
18/* $Id: ipv6.h,v 1.19 2007/06/18 23:47:49 tbox Exp $ */
19
20#ifndef ISC_IPV6_H
21#define ISC_IPV6_H 1
22
23/*****
24 ***** Module Info
25 *****/
26
27/*
28 * IPv6 definitions for systems which do not support IPv6.
29 *
30 * MP:
31 *	No impact.
32 *
33 * Reliability:
34 *	No anticipated impact.
35 *
36 * Resources:
37 *	N/A.
38 *
39 * Security:
40 *	No anticipated impact.
41 *
42 * Standards:
43 *	RFC2553.
44 */
45
46#if _MSC_VER < 1300
47#define in6_addr in_addr6
48#endif
49
50#ifndef IN6ADDR_ANY_INIT
51#define IN6ADDR_ANY_INIT 	{{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }}
52#endif
53#ifndef IN6ADDR_LOOPBACK_INIT
54#define IN6ADDR_LOOPBACK_INIT 	{{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 }}
55#endif
56
57LIBISC_EXTERNAL_DATA extern const struct in6_addr isc_net_in6addrany;
58LIBISC_EXTERNAL_DATA extern const struct in6_addr isc_net_in6addrloop;
59
60/*
61 * Unspecified
62 */
63#ifndef IN6_IS_ADDR_UNSPECIFIED
64#define IN6_IS_ADDR_UNSPECIFIED(a) (\
65*((u_long *)((a)->s6_addr)    ) == 0 && \
66*((u_long *)((a)->s6_addr) + 1) == 0 && \
67*((u_long *)((a)->s6_addr) + 2) == 0 && \
68*((u_long *)((a)->s6_addr) + 3) == 0 \
69)
70#endif
71
72/*
73 * Loopback
74 */
75#ifndef IN6_IS_ADDR_LOOPBACK
76#define IN6_IS_ADDR_LOOPBACK(a) (\
77*((u_long *)((a)->s6_addr)    ) == 0 && \
78*((u_long *)((a)->s6_addr) + 1) == 0 && \
79*((u_long *)((a)->s6_addr) + 2) == 0 && \
80*((u_long *)((a)->s6_addr) + 3) == htonl(1) \
81)
82#endif
83
84/*
85 * IPv4 compatible
86 */
87#define IN6_IS_ADDR_V4COMPAT(a)  (\
88*((u_long *)((a)->s6_addr)    ) == 0 && \
89*((u_long *)((a)->s6_addr) + 1) == 0 && \
90*((u_long *)((a)->s6_addr) + 2) == 0 && \
91*((u_long *)((a)->s6_addr) + 3) != 0 && \
92*((u_long *)((a)->s6_addr) + 3) != htonl(1) \
93)
94
95/*
96 * Mapped
97 */
98#define IN6_IS_ADDR_V4MAPPED(a) (\
99*((u_long *)((a)->s6_addr)    ) == 0 && \
100*((u_long *)((a)->s6_addr) + 1) == 0 && \
101*((u_long *)((a)->s6_addr) + 2) == htonl(0x0000ffff))
102
103/*
104 * Multicast
105 */
106#define IN6_IS_ADDR_MULTICAST(a)	\
107	((a)->s6_addr[0] == 0xffU)
108
109/*
110 * Unicast link / site local.
111 */
112#ifndef IN6_IS_ADDR_LINKLOCAL
113#define IN6_IS_ADDR_LINKLOCAL(a)	(\
114	((a)->s6_addr[0] == 0xfe) && \
115	(((a)->s6_addr[1] & 0xc0) == 0x80))
116#endif
117
118#ifndef IN6_IS_ADDR_SITELOCAL
119#define IN6_IS_ADDR_SITELOCAL(a)	(\
120	((a)->s6_addr[0] == 0xfe) && \
121	(((a)->s6_addr[1] & 0xc0) == 0xc0))
122#endif
123
124#endif /* ISC_IPV6_H */
125