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RIOT/sys/include/net/gnrc/ipv6/hdr.h 1.42 KB
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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_ipv6_hdr IPv6 header defintions
   * @ingroup     net_gnrc_ipv6
   * @{
   *
   * @file
   * @brief   IPv6 header
   *
   * @author  Martine Lenders <mlenders@inf.fu-berlin.de>
   */
  #ifndef NET_GNRC_IPV6_HDR_H
  #define NET_GNRC_IPV6_HDR_H
  
  #include <stdint.h>
  
  #include "net/ipv6/hdr.h"
  #include "net/gnrc/pkt.h"
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /**
   * @brief   Builds an IPv6 header for sending and adds it to the packet buffer.
   *
   * @details Initializes version field with 6, traffic class, flow label, and
   *          hop limit with 0, and next header with @ref PROTNUM_RESERVED.
   *
   * @param[in] payload   Payload for the packet.
   * @param[in] src       Source address for the header. Can be NULL if not
   *                      known or required.
   * @param[in] dst       Destination address for the header. Can be NULL if not
   *                      known or required.
   *
   * @return  The an IPv6 header in packet buffer on success.
   * @return  NULL on error.
   */
  gnrc_pktsnip_t *gnrc_ipv6_hdr_build(gnrc_pktsnip_t *payload, const ipv6_addr_t *src,
                                      const ipv6_addr_t *dst);
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* NET_GNRC_IPV6_HDR_H */
  /** @} */