iphc.h
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/*
* Copyright (C) 2015 Martine Lenders <mlenders@inf.fu-berlin.de>
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @defgroup net_gnrc_sixlowpan_iphc IPv6 header compression (IPHC)
* @ingroup net_gnrc_sixlowpan
* @brief IPv6 header compression for 6LoWPAN.
* @{
*
* @file
* @brief 6LoWPAN IPHC definitions
*
* @author Martine Lenders <mlenders@inf.fu-berlin.de>
*/
#ifndef GNRC_SIXLOWPAN_IPHC_H_
#define GNRC_SIXLOWPAN_IPHC_H_
#include <stdbool.h>
#include "net/gnrc/pkt.h"
#include "net/sixlowpan.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Decompresses a received 6LoWPAN IPHC frame.
*
* @pre (dec_hdr != NULL) && (*dec_hdr != NULL) && ((*dec_hdr)->size >= sizeof(gnrc_ipv6_hdr_t))
*
* @param[out] dec_hdr A pre-allocated IPv6 header. Will not be inserted into
* @p pkt. May change due to next headers being added in NHC.
* @param[in] pkt A received 6LoWPAN IPHC frame. IPHC dispatch will not
* be marked.
* @param[in] datagram_size Size of the full uncompressed IPv6 datagram. May be 0, if @p pkt
* contains the full (unfragmented) IPv6 datagram.
* @param[in] offset Offset of the IPHC dispatch in 6LoWPaN frame.
*
* @return length of the HC dispatches + inline values on success.
* @return 0 on error.
*/
size_t gnrc_sixlowpan_iphc_decode(gnrc_pktsnip_t **dec_hdr, gnrc_pktsnip_t *pkt,
size_t datagram_size, size_t offset,
size_t *nh_len);
/**
* @brief Compresses a 6LoWPAN for IPHC.
*
* @param[in,out] pkt A 6LoWPAN frame with an uncompressed IPv6 header to
* send. Will be translated to an 6LoWPAN IPHC frame.
*
* @return true, on success
* @return false, on error.
*/
bool gnrc_sixlowpan_iphc_encode(gnrc_pktsnip_t *pkt);
#ifdef __cplusplus
}
#endif
#endif /* GNRC_SIXLOWPAN_IPHC_H_ */
/** @} */