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72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
/*
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* Copyright (C) 2018 Freie Universität Berlin
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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_gnrc_ipv6_ext_rh Support for IPv6 routing header extension
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* @ingroup net_gnrc_ipv6_ext
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* @brief GNRC implementation of IPv6 routing header extension.
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* @{
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*
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* @file
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* @brief GNRC routing extension header definitions.
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*
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* @author Martine Lenders <m.lenders@fu-berlin.de>
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*/
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#ifndef NET_GNRC_IPV6_EXT_RH_H
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#define NET_GNRC_IPV6_EXT_RH_H
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#include "net/gnrc/pkt.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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enum {
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/**
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* @brief An error occurred during routing header processing
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*/
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GNRC_IPV6_EXT_RH_ERROR = 0,
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/**
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* @brief The routing header was successfully processed and this node
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* is the destination (i.e. ipv6_ext_rh_t::seg_left == 0)
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*/
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GNRC_IPV6_EXT_RH_AT_DST,
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/**
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* @brief The routing header was successfully processed and the packet
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* was forwarded to another node or should be forwarded to another
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* node.
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*
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* When @ref gnrc_ipv6_ext_rh_process() returns this value, the packet was
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* already forwarded to another node. Implementations for specific routing
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* header types should leave the forwarding to the calling @ref
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* gnrc_ipv6_ext_rh_process() and should return @ref
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* GNRC_IPV6_EXT_RH_FORWARDED if they want the packet to be forwarded. They
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* should however set ipv6_hdr_t::dst accordingly.
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*/
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GNRC_IPV6_EXT_RH_FORWARDED,
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};
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/**
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* @brief Process the routing header of an IPv6 packet.
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*
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* @param[in] pkt An IPv6 packet containing the routing header in the first
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* snip
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*
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* @return @ref GNRC_IPV6_EXT_RH_AT_DST, on success
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* @return @ref GNRC_IPV6_EXT_RH_FORWARDED, when @p pkt was forwarded
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* @return @ref GNRC_IPV6_EXT_RH_ERROR, on error
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*/
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int gnrc_ipv6_ext_rh_process(gnrc_pktsnip_t *pkt);
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#ifdef __cplusplus
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}
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#endif
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#endif /* NET_GNRC_IPV6_EXT_RH_H */
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/** @} */
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