575 lines
21 KiB
C
575 lines
21 KiB
C
/*
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* Copyright (c) 2006, Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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*/
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/**
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* \addtogroup uip6
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* @{
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*/
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/**
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* \file
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* Header file for IPv6 Neighbor discovery (RFC 4861)
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* \author Julien Abeille <jabeille@cisco.com>
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* \author Mathilde Durvy <mdurvy@cisco.com>
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*/
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#ifndef UIP_ND6_H_
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#define UIP_ND6_H_
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#include "net/ip/uip.h"
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#include "sys/stimer.h"
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/**
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* \name General
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* @{
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*/
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/** \brief HOP LIMIT to be used when sending ND messages (255) */
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#define UIP_ND6_HOP_LIMIT 255
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/** \brief INFINITE lifetime */
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#define UIP_ND6_INFINITE_LIFETIME 0xFFFFFFFF
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/** @} */
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/** \name RFC 4861 Host constant */
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/** @{ */
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/** \brief Maximum router solicitation delay */
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#ifndef UIP_CONF_ND6_MAX_RTR_SOLICITATION_DELAY
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#define UIP_ND6_MAX_RTR_SOLICITATION_DELAY 1
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#else
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#define UIP_ND6_MAX_RTR_SOLICITATION_DELAY UIP_CONF_ND6_MAX_RTR_SOLICITATION_DELAY
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#endif
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/** \brief Router solicitation interval */
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#ifndef UIP_CONF_ND6_RTR_SOLICITATION_INTERVAL
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#define UIP_ND6_RTR_SOLICITATION_INTERVAL 4
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#else
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#define UIP_ND6_RTR_SOLICITATION_INTERVAL UIP_CONF_ND6_RTR_SOLICITATION_INTERVAL
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#endif
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/** \brief Maximum router solicitations */
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#ifndef UIP_CONF_ND6_MAX_RTR_SOLICITATIONS
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#define UIP_ND6_MAX_RTR_SOLICITATIONS 3
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#else
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#define UIP_ND6_MAX_RTR_SOLICITATIONS UIP_CONF_ND6_MAX_RTR_SOLICITATIONS
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#endif
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/** @} */
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/** \name RFC 4861 Router constants */
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/** @{ */
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#ifndef UIP_CONF_ND6_SEND_RA
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#define UIP_ND6_SEND_RA 1 /* enable/disable RA sending */
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#else
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#define UIP_ND6_SEND_RA UIP_CONF_ND6_SEND_RA
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#endif
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#ifndef UIP_CONF_ND6_SEND_NS
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#define UIP_ND6_SEND_NS 1 /* enable/disable NS sending */
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#else
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#define UIP_ND6_SEND_NS UIP_CONF_ND6_SEND_NS
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#endif
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#ifndef UIP_CONF_ND6_SEND_NA
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#define UIP_ND6_SEND_NA 1 /* enable/disable NA sending */
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#else
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#define UIP_ND6_SEND_NA UIP_CONF_ND6_SEND_NA
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#endif
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#ifndef UIP_CONF_ND6_MAX_RA_INTERVAL
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#define UIP_ND6_MAX_RA_INTERVAL 600
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#else
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#define UIP_ND6_MAX_RA_INTERVAL UIP_CONF_ND6_MAX_RA_INTERVAL
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#endif
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#ifndef UIP_CONF_ND6_MIN_RA_INTERVAL
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#define UIP_ND6_MIN_RA_INTERVAL (UIP_ND6_MAX_RA_INTERVAL / 3)
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#else
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#define UIP_ND6_MIN_RA_INTERVAL UIP_CONF_ND6_MIN_RA_INTERVAL
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#endif
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#define UIP_ND6_M_FLAG 0
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#define UIP_ND6_O_FLAG (UIP_ND6_RA_RDNSS || UIP_ND6_RA_DNSSL)
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#ifndef UIP_CONF_ROUTER_LIFETIME
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#define UIP_ND6_ROUTER_LIFETIME 3 * UIP_ND6_MAX_RA_INTERVAL
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#else
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#define UIP_ND6_ROUTER_LIFETIME UIP_CONF_ROUTER_LIFETIME
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#endif
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#define UIP_ND6_MAX_INITIAL_RA_INTERVAL 16 /*seconds*/
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#define UIP_ND6_MAX_INITIAL_RAS 3 /*transmissions*/
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#ifndef UIP_CONF_ND6_MIN_DELAY_BETWEEN_RAS
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#define UIP_ND6_MIN_DELAY_BETWEEN_RAS 3 /*seconds*/
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#else
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#define UIP_ND6_MIN_DELAY_BETWEEN_RAS UIP_CONF_ND6_MIN_DELAY_BETWEEN_RAS
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#endif
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//#define UIP_ND6_MAX_RA_DELAY_TIME 0.5 /*seconds*/
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#define UIP_ND6_MAX_RA_DELAY_TIME_MS 500 /*milli seconds*/
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/** @} */
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#ifndef UIP_CONF_ND6_DEF_MAXDADNS
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/** \brief Do not try DAD when using EUI-64 as allowed by draft-ietf-6lowpan-nd-15 section 8.2 */
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#if UIP_CONF_LL_802154
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#define UIP_ND6_DEF_MAXDADNS 0
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#else /* UIP_CONF_LL_802154 */
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#define UIP_ND6_DEF_MAXDADNS UIP_ND6_SEND_NS
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#endif /* UIP_CONF_LL_802154 */
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#else /* UIP_CONF_ND6_DEF_MAXDADNS */
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#define UIP_ND6_DEF_MAXDADNS UIP_CONF_ND6_DEF_MAXDADNS
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#endif /* UIP_CONF_ND6_DEF_MAXDADNS */
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/** \name RFC 4861 Node constant */
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#define UIP_ND6_MAX_MULTICAST_SOLICIT 3
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#ifdef UIP_CONF_ND6_MAX_UNICAST_SOLICIT
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#define UIP_ND6_MAX_UNICAST_SOLICIT UIP_CONF_ND6_MAX_UNICAST_SOLICIT
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#else /* UIP_CONF_ND6_MAX_UNICAST_SOLICIT */
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#define UIP_ND6_MAX_UNICAST_SOLICIT 3
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#endif /* UIP_CONF_ND6_MAX_UNICAST_SOLICIT */
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#ifdef UIP_CONF_ND6_REACHABLE_TIME
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#define UIP_ND6_REACHABLE_TIME UIP_CONF_ND6_REACHABLE_TIME
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#else
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#define UIP_ND6_REACHABLE_TIME 30000
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#endif
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#ifdef UIP_CONF_ND6_RETRANS_TIMER
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#define UIP_ND6_RETRANS_TIMER UIP_CONF_ND6_RETRANS_TIMER
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#else
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#define UIP_ND6_RETRANS_TIMER 1000
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#endif
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#define UIP_ND6_DELAY_FIRST_PROBE_TIME 5
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#define UIP_ND6_MIN_RANDOM_FACTOR(x) (x / 2)
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#define UIP_ND6_MAX_RANDOM_FACTOR(x) ((x) + (x) / 2)
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/** @} */
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/** \name RFC 6106 RA DNS Options Constants */
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/** @{ */
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#ifndef UIP_CONF_ND6_RA_RDNSS
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#define UIP_ND6_RA_RDNSS 0
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#else
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#define UIP_ND6_RA_RDNSS UIP_CONF_ND6_RA_RDNSS
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#endif
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#ifndef UIP_CONF_ND6_RA_DNSSL
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#define UIP_ND6_RA_DNSSL 0
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#else
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#error Not implemented
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#define UIP_ND6_RA_DNSSL UIP_CONF_ND6_RA_DNSSL
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#endif
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/** @} */
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/** \name ND6 option types */
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/** @{ */
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#define UIP_ND6_OPT_SLLAO 1
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#define UIP_ND6_OPT_TLLAO 2
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#define UIP_ND6_OPT_PREFIX_INFO 3
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#define UIP_ND6_OPT_REDIRECTED_HDR 4
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#define UIP_ND6_OPT_MTU 5
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#define UIP_ND6_OPT_RDNSS 25
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#define UIP_ND6_OPT_DNSSL 31
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/** @} */
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/** \name ND6 option types */
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/** @{ */
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#define UIP_ND6_OPT_TYPE_OFFSET 0
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#define UIP_ND6_OPT_LEN_OFFSET 1
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#define UIP_ND6_OPT_DATA_OFFSET 2
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/** \name ND6 message length (excluding options) */
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/** @{ */
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#define UIP_ND6_NA_LEN 20
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#define UIP_ND6_NS_LEN 20
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#define UIP_ND6_RA_LEN 12
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#define UIP_ND6_RS_LEN 4
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/** @} */
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/** \name ND6 option length in bytes */
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/** @{ */
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#define UIP_ND6_OPT_HDR_LEN 2
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#define UIP_ND6_OPT_PREFIX_INFO_LEN 32
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#define UIP_ND6_OPT_MTU_LEN 8
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#define UIP_ND6_OPT_RDNSS_LEN 1
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#define UIP_ND6_OPT_DNSSL_LEN 1
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/* Length of TLLAO and SLLAO options, it is L2 dependant */
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#if UIP_CONF_LL_802154
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/* If the interface is 802.15.4. For now we use only long addresses */
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#define UIP_ND6_OPT_SHORT_LLAO_LEN 8
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#define UIP_ND6_OPT_LONG_LLAO_LEN 16
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/** \brief length of a ND6 LLAO option for 802.15.4 */
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#define UIP_ND6_OPT_LLAO_LEN UIP_ND6_OPT_LONG_LLAO_LEN
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#else /*UIP_CONF_LL_802154*/
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#if UIP_CONF_LL_80211
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/* If the interface is 802.11 */
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/** \brief length of a ND6 LLAO option for 802.11 */
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#define UIP_ND6_OPT_LLAO_LEN 8
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#else /*UIP_CONF_LL_80211*/
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/** \brief length of a ND6 LLAO option for default L2 type (e.g. Ethernet) */
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#define UIP_ND6_OPT_LLAO_LEN 8
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#endif /*UIP_CONF_LL_80211*/
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#endif /*UIP_CONF_LL_802154*/
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/** @} */
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/** \name Neighbor Advertisement flags masks */
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/** @{ */
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#define UIP_ND6_NA_FLAG_ROUTER 0x80
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#define UIP_ND6_NA_FLAG_SOLICITED 0x40
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#define UIP_ND6_NA_FLAG_OVERRIDE 0x20
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#define UIP_ND6_RA_FLAG_ONLINK 0x80
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#define UIP_ND6_RA_FLAG_AUTONOMOUS 0x40
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/** @} */
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/**
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* \name ND message structures
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* @{
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*/
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/**
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* \brief A neighbor solicitation constant part
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*
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* Possible option is: SLLAO
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*/
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typedef struct uip_nd6_ns {
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uint32_t reserved;
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uip_ipaddr_t tgtipaddr;
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} uip_nd6_ns;
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/**
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* \brief A neighbor advertisement constant part.
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*
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* Possible option is: TLLAO
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*/
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typedef struct uip_nd6_na {
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uint8_t flagsreserved;
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uint8_t reserved[3];
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uip_ipaddr_t tgtipaddr;
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} uip_nd6_na;
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/**
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* \brief A router solicitation constant part
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*
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* Possible option is: SLLAO
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*/
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typedef struct uip_nd6_rs {
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uint32_t reserved;
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} uip_nd6_rs;
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/**
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* \brief A router advertisement constant part
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*
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* Possible options are: SLLAO, MTU, Prefix Information
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*/
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typedef struct uip_nd6_ra {
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uint8_t cur_ttl;
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uint8_t flags_reserved;
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uint16_t router_lifetime;
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uint32_t reachable_time;
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uint32_t retrans_timer;
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} uip_nd6_ra;
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/**
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* \brief A redirect message constant part
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*
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* Possible options are: TLLAO, redirected header
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*/
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typedef struct uip_nd6_redirect {
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uint32_t reserved;
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uip_ipaddr_t tgtipaddress;
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uip_ipaddr_t destipaddress;
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} uip_nd6_redirect;
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/** @} */
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/**
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* \name ND Option structures
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* @{
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*/
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/** \brief ND option header */
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typedef struct uip_nd6_opt_hdr {
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uint8_t type;
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uint8_t len;
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} uip_nd6_opt_hdr;
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/** \brief ND option prefix information */
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typedef struct uip_nd6_opt_prefix_info {
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uint8_t type;
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uint8_t len;
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uint8_t preflen;
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uint8_t flagsreserved1;
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uint32_t validlt;
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uint32_t preferredlt;
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uint32_t reserved2;
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uip_ipaddr_t prefix;
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} uip_nd6_opt_prefix_info ;
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/** \brief ND option MTU */
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typedef struct uip_nd6_opt_mtu {
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uint8_t type;
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uint8_t len;
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uint16_t reserved;
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uint32_t mtu;
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} uip_nd6_opt_mtu;
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/** \brief ND option RDNSS */
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typedef struct uip_nd6_opt_dns {
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uint8_t type;
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uint8_t len;
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uint16_t reserved;
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uint32_t lifetime;
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uip_ipaddr_t ip;
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} uip_nd6_opt_dns;
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/** \struct Redirected header option */
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typedef struct uip_nd6_opt_redirected_hdr {
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uint8_t type;
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uint8_t len;
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uint8_t reserved[6];
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} uip_nd6_opt_redirected_hdr;
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/** @} */
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/**
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* \name ND Messages Processing and Generation
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* @{
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*/
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/**
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* \brief Send a neighbor solicitation, send a Neighbor Advertisement
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* \param src pointer to the src of the NS if known
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* \param dest pointer to ip address to send the NS, for DAD or ADDR Resol,
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* MUST be NULL, for NUD, must be correct unicast dest
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* \param tgt pointer to ip address to fill the target address field, must
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* not be NULL
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*
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* - RFC 4861, 7.2.2 :
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* "If the source address of the packet prompting the solicitation is the
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* same as one of the addresses assigned to the outgoing interface, that
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* address SHOULD be placed in the IP Source Address of the outgoing
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* solicitation. Otherwise, any one of the addresses assigned to the
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* interface should be used."
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* This is why we have a src ip address as argument. If NULL, we will do
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* src address selection, otherwise we use the argument.
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*
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* - we check if it is a NS for Address resolution or NUD, if yes we include
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* a SLLAO option, otherwise no.
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*/
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void
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uip_nd6_ns_output(uip_ipaddr_t *src, uip_ipaddr_t *dest, uip_ipaddr_t *tgt);
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#if UIP_CONF_ROUTER
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#if UIP_ND6_SEND_RA
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/**
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* \brief send a Router Advertisement
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*
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* Only for router, for periodic as well as sollicited RA
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*/
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void uip_nd6_ra_output(uip_ipaddr_t *dest);
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#endif /* UIP_ND6_SEND_RA */
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#endif /*UIP_CONF_ROUTER*/
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/**
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* \brief Send a Router Solicitation
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*
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* src is chosen through the uip_netif_select_src function. If src is
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* unspecified (i.e. we do not have a preferred address yet), then we do not
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* put a SLLAO option (MUST NOT in RFC 4861). Otherwise we do.
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*
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* RS message format,
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* possible option is SLLAO, MUST NOT be included if source = unspecified
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* SHOULD be included otherwise
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*/
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void uip_nd6_rs_output(void);
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/**
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* \brief Initialise the uIP ND core
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*/
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void uip_nd6_init(void);
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/** @} */
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void
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uip_appserver_addr_get(uip_ipaddr_t *ipaddr);
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/*--------------------------------------*/
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/******* ANNEX - message formats ********/
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/*--------------------------------------*/
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/*
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* RS format. possible option is SLLAO
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* 0 1 2 3
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* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Type | Code | Checksum |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Reserved |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Options ...
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* +-+-+-+-+-+-+-+-+-+-+-+-
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*
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*
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* RA format. possible options: prefix information, MTU, SLLAO
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* 0 1 2 3
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* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Type | Code | Checksum |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Cur Hop Limit |M|O| Reserved | Router Lifetime |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Reachable Time |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Retrans Timer |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Options ...
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* +-+-+-+-+-+-+-+-+-+-+-+-
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*
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*
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* NS format: options should be SLLAO
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* 0 1 2 3
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* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Type | Code | Checksum |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Reserved |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | |
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* + +
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* | |
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* + Target Address +
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* | |
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* + +
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* | |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Options ...
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-
|
|
*
|
|
*
|
|
* NA message format. possible options is TLLAO
|
|
*
|
|
* 0 1 2 3
|
|
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Type | Code | Checksum |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* |R|S|O| Reserved |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | |
|
|
* + +
|
|
* | |
|
|
* + Target Address +
|
|
* | |
|
|
* + +
|
|
* | |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Options ...
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-
|
|
*
|
|
*
|
|
* Redirect message format. Possible options are TLLAO and Redirected header
|
|
*
|
|
* 0 1 2 3
|
|
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Type | Code | Checksum |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Reserved |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | |
|
|
* + +
|
|
* | |
|
|
* + Target Address +
|
|
* | |
|
|
* + +
|
|
* | |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | |
|
|
* + +
|
|
* | |
|
|
* + Destination Address +
|
|
* | |
|
|
* + +
|
|
* | |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Options ...
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-
|
|
*
|
|
*
|
|
* SLLAO/TLLAO option:
|
|
* 0 1 2 3
|
|
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Type | Length | Link-Layer Address ...
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
*
|
|
*
|
|
* Prefix information option
|
|
* 0 1 2 3
|
|
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Type | Length | Prefix Length |L|A| Reserved1 |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Valid Lifetime |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Preferred Lifetime |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Reserved2 |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | |
|
|
* + +
|
|
* | |
|
|
* + Prefix +
|
|
* | |
|
|
* + +
|
|
* | |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
*
|
|
*
|
|
* MTU option
|
|
* 0 1 2 3
|
|
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Type | Length | Reserved |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | MTU |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
*
|
|
*
|
|
* Redirected header option
|
|
*
|
|
* 0 1 2 3
|
|
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Type | Length | Reserved |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Reserved |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | |
|
|
* ~ IP header + data ~
|
|
* | |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
*
|
|
*/
|
|
#endif /* UIP_ND6_H_ */
|
|
|
|
/** @} */
|