/*
* Copyright (C) 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 https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
#ifndef LWRES_IPV6_H
#define LWRES_IPV6_H 1
/*****
***** Module Info
*****/
/*! \file lwres/ipv6.h
* IPv6 definitions for systems which do not support IPv6.
*/
/***
*** Imports.
***/
#include <inttypes.h>
#include <lwres/platform.h>
/***
*** Types.
***/
/*% in6_addr structure */
struct in6_addr {
union {
uint8_t _S6_u8[16];
uint16_t _S6_u16[8];
uint32_t _S6_u32[4];
} _S6_un;
};
/*@{*/
/*% IP v6 types */
#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 }}}
LIBLWRES_EXTERNAL_DATA extern const struct in6_addr in6addr_any;
LIBLWRES_EXTERNAL_DATA extern const struct in6_addr in6addr_loopback;
/*% used in getaddrinfo.c and getnameinfo.c */
struct sockaddr_in6 {
#ifdef LWRES_PLATFORM_HAVESALEN
uint8_t sin6_len;
uint8_t sin6_family;
#else
uint16_t sin6_family;
#endif
uint16_t sin6_port;
uint32_t sin6_flowinfo;
struct in6_addr sin6_addr;
uint32_t sin6_scope_id;
};
#ifdef LWRES_PLATFORM_HAVESALEN
#define SIN6_LEN 1
#endif
/*% in6_pktinfo structure */
struct in6_pktinfo {
struct in6_addr ipi6_addr; /*%< src/dst IPv6 address */
unsigned int ipi6_ifindex; /*%< send/recv interface index */
};
/*!
* Unspecified IPv6 address
*/
#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)))
#endif /* LWRES_IPV6_H */
