ipv6.h revision 0c27b3fe77ac1d5094ba3521e8142d9e7973133f
/*
* Copyright (C) 1999-2002, 2004, 2005, 2007, 2016 Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
/* $Id: ipv6.h,v 1.24 2007/06/19 23:47:18 tbox Exp $ */
#ifndef ISC_IPV6_H
#define ISC_IPV6_H 1
/*!
* Also define LWRES_IPV6_H to keep it from being included if liblwres is
* being used, or redefinition errors will occur.
*/
#define LWRES_IPV6_H 1
/*****
***** Module Info
*****/
/*! \file isc/ipv6.h
* \brief IPv6 definitions for systems which do not support IPv6.
*
* \li MP:
* No impact.
*
* \li Reliability:
* No anticipated impact.
*
* \li Resources:
* N/A.
*
* \li Security:
* No anticipated impact.
*
* \li Standards:
* RFC2553.
*/
/***
*** Imports.
***/
#include <isc/int.h>
#include <isc/platform.h>
/***
*** Types.
***/
struct in6_addr {
union {
isc_uint8_t _S6_u8[16];
isc_uint16_t _S6_u16[8];
isc_uint32_t _S6_u32[4];
} _S6_un;
};
#define s6_addr _S6_un._S6_u8
#define s6_addr8 _S6_un._S6_u8
#define s6_addr16 _S6_un._S6_u16
#define s6_addr32 _S6_un._S6_u32
#define IN6ADDR_ANY_INIT {{{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }}}
#define IN6ADDR_LOOPBACK_INIT {{{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 }}}
LIBISC_EXTERNAL_DATA extern const struct in6_addr in6addr_any;
LIBISC_EXTERNAL_DATA extern const struct in6_addr in6addr_loopback;
struct sockaddr_in6 {
#ifdef ISC_PLATFORM_HAVESALEN
isc_uint8_t sin6_len;
isc_uint8_t sin6_family;
#else
isc_uint16_t sin6_family;
#endif
isc_uint16_t sin6_port;
isc_uint32_t sin6_flowinfo;
struct in6_addr sin6_addr;
isc_uint32_t sin6_scope_id;
};
#ifdef ISC_PLATFORM_HAVESALEN
#define SIN6_LEN 1
#endif
/*%
* Unspecified
*/
#define IN6_IS_ADDR_UNSPECIFIED(a) \
(((a)->s6_addr32[0] == 0) && \
((a)->s6_addr32[1] == 0) && \
((a)->s6_addr32[2] == 0) && \
((a)->s6_addr32[3] == 0))
/*%
* Loopback
*/
#define IN6_IS_ADDR_LOOPBACK(a) \
(((a)->s6_addr32[0] == 0) && \
((a)->s6_addr32[1] == 0) && \
((a)->s6_addr32[2] == 0) && \
((a)->s6_addr32[3] == htonl(1)))
/*%
* IPv4 compatible
*/
#define IN6_IS_ADDR_V4COMPAT(a) \
(((a)->s6_addr32[0] == 0) && \
((a)->s6_addr32[1] == 0) && \
((a)->s6_addr32[2] == 0) && \
((a)->s6_addr32[3] != 0) && \
((a)->s6_addr32[3] != htonl(1)))
/*%
* Mapped
*/
#define IN6_IS_ADDR_V4MAPPED(a) \
(((a)->s6_addr32[0] == 0) && \
((a)->s6_addr32[1] == 0) && \
((a)->s6_addr32[2] == htonl(0x0000ffff)))
/*%
* Multicast
*/
#define IN6_IS_ADDR_MULTICAST(a) \
((a)->s6_addr8[0] == 0xffU)
/*%
* Unicast link / site local.
*/
#define IN6_IS_ADDR_LINKLOCAL(a) \
(((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80))
#define IN6_IS_ADDR_SITELOCAL(a) \
(((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0))
#endif /* ISC_IPV6_H */