/*

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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")

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*

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* This Source Code Form is subject to the terms of the Mozilla Public

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* License, v. 2.0. If a copy of the MPL was not distributed with this

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* file, you can obtain one at https://mozilla.org/MPL/2.0/.

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*

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* See the COPYRIGHT file distributed with this work for additional

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* information regarding copyright ownership.

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*/

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#ifndef LWRES_IPV6_H

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#define LWRES_IPV6_H 1

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/*****

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***** Module Info

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*****/

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/*! \file lwres/ipv6.h

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* IPv6 definitions for systems which do not support IPv6.

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*/

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/***

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*** Imports.

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***/

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#include <inttypes.h>

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#include <lwres/platform.h>

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/***

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*** Types.

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***/

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/*% in6_addr structure */

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struct in6_addr {

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union {

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uint8_t _S6_u8[16];

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uint16_t _S6_u16[8];

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uint32_t _S6_u32[4];

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} _S6_un;

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};

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/*@{*/

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/*% IP v6 types */

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#define s6_addr _S6_un._S6_u8

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#define s6_addr8 _S6_un._S6_u8

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#define s6_addr16 _S6_un._S6_u16

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#define s6_addr32 _S6_un._S6_u32

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/*@}*/

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#define IN6ADDR_ANY_INIT {{{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }}}

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#define IN6ADDR_LOOPBACK_INIT {{{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 }}}

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LIBLWRES_EXTERNAL_DATA extern const struct in6_addr in6addr_any;

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LIBLWRES_EXTERNAL_DATA extern const struct in6_addr in6addr_loopback;

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/*% used in getaddrinfo.c and getnameinfo.c */

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struct sockaddr_in6 {

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#ifdef LWRES_PLATFORM_HAVESALEN

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uint8_t sin6_len;

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uint8_t sin6_family;

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#else

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uint16_t sin6_family;

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#endif

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uint16_t sin6_port;

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uint32_t sin6_flowinfo;

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struct in6_addr sin6_addr;

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uint32_t sin6_scope_id;

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};

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#ifdef LWRES_PLATFORM_HAVESALEN

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#define SIN6_LEN 1

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#endif

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/*% in6_pktinfo structure */

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struct in6_pktinfo {

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struct in6_addr ipi6_addr; /*%< src/dst IPv6 address */

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unsigned int ipi6_ifindex; /*%< send/recv interface index */

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};

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/*!

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* Unspecified IPv6 address

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*/

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#define IN6_IS_ADDR_UNSPECIFIED(a) \

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(((a)->s6_addr32[0] == 0) && \

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((a)->s6_addr32[1] == 0) && \

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((a)->s6_addr32[2] == 0) && \

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((a)->s6_addr32[3] == 0))

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/*

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* Loopback

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*/

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#define IN6_IS_ADDR_LOOPBACK(a) \

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(((a)->s6_addr32[0] == 0) && \

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((a)->s6_addr32[1] == 0) && \

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((a)->s6_addr32[2] == 0) && \

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((a)->s6_addr32[3] == htonl(1)))

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/*

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* IPv4 compatible

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*/

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#define IN6_IS_ADDR_V4COMPAT(a) \

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(((a)->s6_addr32[0] == 0) && \

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((a)->s6_addr32[1] == 0) && \

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((a)->s6_addr32[2] == 0) && \

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((a)->s6_addr32[3] != 0) && \

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((a)->s6_addr32[3] != htonl(1)))

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/*

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* Mapped

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*/

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#define IN6_IS_ADDR_V4MAPPED(a) \

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(((a)->s6_addr32[0] == 0) && \

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((a)->s6_addr32[1] == 0) && \

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((a)->s6_addr32[2] == htonl(0x0000ffff)))

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#endif /* LWRES_IPV6_H */

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