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23bdc80e22
RFC 2460 was obsoleted by RFC 8200. This PR changes the references around, so we don't reference an obsoleted RFC ;-). Also I'm moving these references from the old-style HTML-like format to the newer-style Markdown-like format.
63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
/*
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* Copyright (C) 2015 Martine Lenders <mlenders@inf.fu-berlin.de>
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @defgroup net_ipv6_ext IPv6 extension headers
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* @ingroup net_ipv6
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* @brief Provides IPv6 extension header definitions and helper functions.
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* @{
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*
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* @file
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* @brief IPv6 extension header definitions.
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*
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* @author Martine Lenders <mlenders@inf.fu-berlin.de>
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*/
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#ifndef NET_IPV6_EXT_H
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#define NET_IPV6_EXT_H
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#include <stdint.h>
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#include "net/ipv6/ext/rh.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define IPV6_EXT_LEN_UNIT (8U) /**< Unit in byte for the extension header's
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* length field */
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/**
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* @brief IPv6 extension headers.
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*
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* @see [RFC 8200, section 4](https://tools.ietf.org/html/rfc8200#section-4)
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*/
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typedef struct __attribute__((packed)) {
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uint8_t nh; /**< next header */
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uint8_t len; /**< length in 8 octets without first octet */
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} ipv6_ext_t;
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/**
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* @brief Gets the next extension header in a packet.
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*
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* @param[in] ext The current extension header.
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*
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* @return The next extension header.
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*/
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static inline ipv6_ext_t *ipv6_ext_get_next(ipv6_ext_t *ext)
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{
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return (ipv6_ext_t *)((uint8_t *)(ext) + (ext->len * IPV6_EXT_LEN_UNIT) +
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IPV6_EXT_LEN_UNIT);
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* NET_IPV6_EXT_H */
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/** @} */
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