1/*
2 * Copyright (C) 2004-2007  Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 2000, 2001  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 1.16 2007/06/19 23:47:23 tbox Exp $ */
19
20#ifndef LWRES_IPV6_H
21#define LWRES_IPV6_H 1
22
23/*****
24 ***** Module Info
25 *****/
26
27/*! \file lwres/ipv6.h
28 * IPv6 definitions for systems which do not support IPv6.
29 */
30
31/***
32 *** Imports.
33 ***/
34
35#include <lwres/int.h>
36#include <lwres/platform.h>
37
38/***
39 *** Types.
40 ***/
41
42/*% in6_addr structure */
43struct in6_addr {
44        union {
45		lwres_uint8_t	_S6_u8[16];
46		lwres_uint16_t	_S6_u16[8];
47		lwres_uint32_t	_S6_u32[4];
48        } _S6_un;
49};
50/*@{*/
51/*% IP v6 types */
52#define s6_addr		_S6_un._S6_u8
53#define s6_addr8	_S6_un._S6_u8
54#define s6_addr16	_S6_un._S6_u16
55#define s6_addr32	_S6_un._S6_u32
56/*@}*/
57
58#define IN6ADDR_ANY_INIT 	{{{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }}}
59#define IN6ADDR_LOOPBACK_INIT 	{{{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 }}}
60
61LIBLWRES_EXTERNAL_DATA extern const struct in6_addr in6addr_any;
62LIBLWRES_EXTERNAL_DATA extern const struct in6_addr in6addr_loopback;
63
64/*% used in getaddrinfo.c and getnameinfo.c */
65struct sockaddr_in6 {
66#ifdef LWRES_PLATFORM_HAVESALEN
67	lwres_uint8_t		sin6_len;
68	lwres_uint8_t		sin6_family;
69#else
70	lwres_uint16_t		sin6_family;
71#endif
72	lwres_uint16_t		sin6_port;
73	lwres_uint32_t		sin6_flowinfo;
74	struct in6_addr		sin6_addr;
75	lwres_uint32_t		sin6_scope_id;
76};
77
78#ifdef LWRES_PLATFORM_HAVESALEN
79#define SIN6_LEN 1
80#endif
81
82/*% in6_pktinfo structure */
83struct in6_pktinfo {
84	struct in6_addr ipi6_addr;    /*%< src/dst IPv6 address */
85	unsigned int    ipi6_ifindex; /*%< send/recv interface index */
86};
87
88/*!
89 * Unspecified IPv6 address
90 */
91#define IN6_IS_ADDR_UNSPECIFIED(a)      \
92        (((a)->s6_addr32[0] == 0) &&    \
93         ((a)->s6_addr32[1] == 0) &&    \
94         ((a)->s6_addr32[2] == 0) &&    \
95         ((a)->s6_addr32[3] == 0))
96
97/*
98 * Loopback
99 */
100#define IN6_IS_ADDR_LOOPBACK(a)         \
101        (((a)->s6_addr32[0] == 0) &&    \
102         ((a)->s6_addr32[1] == 0) &&    \
103         ((a)->s6_addr32[2] == 0) &&    \
104         ((a)->s6_addr32[3] == htonl(1)))
105
106/*
107 * IPv4 compatible
108 */
109#define IN6_IS_ADDR_V4COMPAT(a)         \
110        (((a)->s6_addr32[0] == 0) &&    \
111         ((a)->s6_addr32[1] == 0) &&    \
112         ((a)->s6_addr32[2] == 0) &&    \
113         ((a)->s6_addr32[3] != 0) &&    \
114         ((a)->s6_addr32[3] != htonl(1)))
115
116/*
117 * Mapped
118 */
119#define IN6_IS_ADDR_V4MAPPED(a)               \
120        (((a)->s6_addr32[0] == 0) &&          \
121         ((a)->s6_addr32[1] == 0) &&          \
122         ((a)->s6_addr32[2] == htonl(0x0000ffff)))
123
124#endif /* LWRES_IPV6_H */
125