128 lines
4.5 KiB
C
128 lines
4.5 KiB
C
/*
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* Copyright (c) 2013, 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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*
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*/
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/**
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* \addtogroup uip
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* @{
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*/
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/**
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* \file
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* IPv6 Neighbor cache (link-layer/IPv6 address mapping)
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* \author Mathilde Durvy <mdurvy@cisco.com>
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* \author Julien Abeille <jabeille@cisco.com>
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* \author Simon Duquennoy <simonduq@sics.se>
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*
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*/
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#ifndef UIP_DS6_NEIGHBOR_H_
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#define UIP_DS6_NEIGHBOR_H_
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#include "contiki.h"
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#include "net/ipv6/uip.h"
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#include "net/ipv6/uip-nd6.h"
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#include "net/nbr-table.h"
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#include "sys/stimer.h"
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#if UIP_CONF_IPV6_QUEUE_PKT
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#include "net/ipv6/uip-packetqueue.h"
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#endif /*UIP_CONF_QUEUE_PKT */
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/*--------------------------------------------------*/
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/** \brief Possible states for the nbr cache entries */
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#define NBR_INCOMPLETE 0
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#define NBR_REACHABLE 1
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#define NBR_STALE 2
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#define NBR_DELAY 3
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#define NBR_PROBE 4
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NBR_TABLE_DECLARE(ds6_neighbors);
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/** \brief An entry in the nbr cache */
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typedef struct uip_ds6_nbr {
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uip_ipaddr_t ipaddr;
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uint8_t isrouter;
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uint8_t state;
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#if UIP_ND6_SEND_NS || UIP_ND6_SEND_RA
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struct stimer reachable;
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struct stimer sendns;
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uint8_t nscount;
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#endif /* UIP_ND6_SEND_NS || UIP_ND6_SEND_RA */
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#if UIP_CONF_IPV6_QUEUE_PKT
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struct uip_packetqueue_handle packethandle;
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#define UIP_DS6_NBR_PACKET_LIFETIME CLOCK_SECOND * 4
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#endif /*UIP_CONF_QUEUE_PKT */
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} uip_ds6_nbr_t;
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void uip_ds6_neighbors_init(void);
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/** \brief Neighbor Cache basic routines */
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uip_ds6_nbr_t *uip_ds6_nbr_add(const uip_ipaddr_t *ipaddr,
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const uip_lladdr_t *lladdr,
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uint8_t isrouter, uint8_t state,
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nbr_table_reason_t reason, void *data);
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int uip_ds6_nbr_rm(uip_ds6_nbr_t *nbr);
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const uip_lladdr_t *uip_ds6_nbr_get_ll(const uip_ds6_nbr_t *nbr);
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const uip_ipaddr_t *uip_ds6_nbr_get_ipaddr(const uip_ds6_nbr_t *nbr);
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uip_ds6_nbr_t *uip_ds6_nbr_lookup(const uip_ipaddr_t *ipaddr);
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uip_ds6_nbr_t *uip_ds6_nbr_ll_lookup(const uip_lladdr_t *lladdr);
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uip_ipaddr_t *uip_ds6_nbr_ipaddr_from_lladdr(const uip_lladdr_t *lladdr);
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const uip_lladdr_t *uip_ds6_nbr_lladdr_from_ipaddr(const uip_ipaddr_t *ipaddr);
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void uip_ds6_link_callback(int status, int numtx);
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void uip_ds6_neighbor_periodic(void);
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int uip_ds6_nbr_num(void);
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uip_ds6_nbr_t *uip_ds6_nbr_head(void);
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uip_ds6_nbr_t *uip_ds6_nbr_next(uip_ds6_nbr_t *nbr);
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#if UIP_ND6_SEND_NS
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/**
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* \brief Refresh the reachable state of a neighbor. This function
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* may be called when a node receives an IPv6 message that confirms the
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* reachability of a neighbor.
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* \param ipaddr pointer to the IPv6 address whose neighbor reachability state
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* should be refreshed.
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*/
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void uip_ds6_nbr_refresh_reachable_state(const uip_ipaddr_t *ipaddr);
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#endif /* UIP_ND6_SEND_NS */
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/**
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* \brief
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* This searches inside the neighbor table for the neighbor that is about to
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* expire the next.
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*
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* \return
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* A reference to the neighbor about to expire the next or NULL if
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* table is empty.
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*/
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uip_ds6_nbr_t *uip_ds6_get_least_lifetime_neighbor(void);
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#endif /* UIP_DS6_NEIGHBOR_H_ */
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/** @} */
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