include/netinet/ip6.h

/****************************************************************************
 * include/netinet/ip6.h
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The
 * ASF licenses this file to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 ****************************************************************************/

#ifndef __INCLUDE_NETINET_IP6_H
#define __INCLUDE_NETINET_IP6_H

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <sys/socket.h>
#include <netinet/in.h>

/****************************************************************************
 * Public Type Definitions
 ****************************************************************************/

struct ip6_hdr
{
  union
  {
    struct ip6_hdrctl
    {
      uint32_t ip6_un1_flow;   /* 4 bits version, 8 bits TC, 20 bits flow-ID */
      uint16_t ip6_un1_plen;   /* payload length */
      uint8_t  ip6_un1_nxt;    /* next header */
      uint8_t  ip6_un1_hlim;   /* hop limit */
    } ip6_un1;

    uint8_t ip6_un2_vfc;       /* 4 bits version, top 4 bits tclass */
  } ip6_ctlun;

  struct in6_addr ip6_src;      /* source address */
  struct in6_addr ip6_dst;      /* destination address */
};

#define ip6_vfc   ip6_ctlun.ip6_un2_vfc
#define ip6_flow  ip6_ctlun.ip6_un1.ip6_un1_flow
#define ip6_plen  ip6_ctlun.ip6_un1.ip6_un1_plen
#define ip6_nxt   ip6_ctlun.ip6_un1.ip6_un1_nxt
#define ip6_hlim  ip6_ctlun.ip6_un1.ip6_un1_hlim
#define ip6_hops  ip6_ctlun.ip6_un1.ip6_un1_hlim

/****************************************************************************
 * Public Function Prototypes
 ****************************************************************************/

#endif /* __INCLUDE_NETINET_IP6_H */