386 lines
12 KiB
C
386 lines
12 KiB
C
/**
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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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* Network interface and stateless autoconfiguration (RFC 4862)
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* \author Mathilde Durvy <mdurvy@cisco.com>
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* \author Julien Abeille <jabeille@cisco.com>
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*
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*/
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/*
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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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#ifndef __UIP_DS6_H__
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#define __UIP_DS6_H__
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#include "net/uip.h"
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#include "sys/stimer.h"
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/* The size of uip_ds6_addr_t depends on UIP_ND6_DEF_MAXDADNS. Include uip-nd6.h to define it. */
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#include "net/uip-nd6.h"
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#include "net/uip-ds6-route.h"
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/*--------------------------------------------------*/
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/** Configuration. For all tables (Neighbor cache, Prefix List, Routing Table,
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* Default Router List, Unicast address list, multicast address list, anycast address list),
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* we define:
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* - the number of elements requested by the user in contiki configuration (name suffixed by _NBU)
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* - the number of elements assigned by the system (name suffixed by _NBS)
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* - the total number of elements is the sum (name suffixed by _NB)
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*/
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/* Neighbor cache */
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#define UIP_DS6_NBR_NBS 0
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#ifndef UIP_CONF_DS6_NBR_NBU
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#define UIP_DS6_NBR_NBU 4
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#else
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#define UIP_DS6_NBR_NBU UIP_CONF_DS6_NBR_NBU
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#endif
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#define UIP_DS6_NBR_NB UIP_DS6_NBR_NBS + UIP_DS6_NBR_NBU
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/* Default router list */
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#define UIP_DS6_DEFRT_NBS 0
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#ifndef UIP_CONF_DS6_DEFRT_NBU
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#define UIP_DS6_DEFRT_NBU 2
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#else
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#define UIP_DS6_DEFRT_NBU UIP_CONF_DS6_DEFRT_NBU
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#endif
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#define UIP_DS6_DEFRT_NB UIP_DS6_DEFRT_NBS + UIP_DS6_DEFRT_NBU
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/* Prefix list */
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#define UIP_DS6_PREFIX_NBS 1
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#ifndef UIP_CONF_DS6_PREFIX_NBU
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#define UIP_DS6_PREFIX_NBU 2
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#else
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#define UIP_DS6_PREFIX_NBU UIP_CONF_DS6_PREFIX_NBU
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#endif
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#define UIP_DS6_PREFIX_NB UIP_DS6_PREFIX_NBS + UIP_DS6_PREFIX_NBU
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/* Unicast address list*/
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#define UIP_DS6_ADDR_NBS 1
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#ifndef UIP_CONF_DS6_ADDR_NBU
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#define UIP_DS6_ADDR_NBU 2
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#else
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#define UIP_DS6_ADDR_NBU UIP_CONF_DS6_ADDR_NBU
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#endif
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#define UIP_DS6_ADDR_NB UIP_DS6_ADDR_NBS + UIP_DS6_ADDR_NBU
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/* Multicast address list */
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#if UIP_CONF_ROUTER
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#define UIP_DS6_MADDR_NBS 2 + UIP_DS6_ADDR_NB /* all routers + all nodes + one solicited per unicast */
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#else
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#define UIP_DS6_MADDR_NBS 1 + UIP_DS6_ADDR_NB /* all nodes + one solicited per unicast */
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#endif
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#ifndef UIP_CONF_DS6_MADDR_NBU
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#define UIP_DS6_MADDR_NBU 0
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#else
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#define UIP_DS6_MADDR_NBU UIP_CONF_DS6_MADDR_NBU
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#endif
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#define UIP_DS6_MADDR_NB UIP_DS6_MADDR_NBS + UIP_DS6_MADDR_NBU
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/* Anycast address list */
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#if UIP_CONF_ROUTER
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#define UIP_DS6_AADDR_NBS UIP_DS6_PREFIX_NB - 1 /* One per non link local prefix (subnet prefix anycast address) */
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#else
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#define UIP_DS6_AADDR_NBS 0
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#endif
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#ifndef UIP_CONF_DS6_AADDR_NBU
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#define UIP_DS6_AADDR_NBU 0
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#else
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#define UIP_DS6_AADDR_NBU UIP_CONF_DS6_AADDR_NBU
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#endif
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#define UIP_DS6_AADDR_NB UIP_DS6_AADDR_NBS + UIP_DS6_AADDR_NBU
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/*--------------------------------------------------*/
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/* Should we use LinkLayer acks in NUD ?*/
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#ifndef UIP_CONF_DS6_LL_NUD
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#define UIP_DS6_LL_NUD 0
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#else
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#define UIP_DS6_LL_NUD UIP_CONF_DS6_LL_NUD
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#endif
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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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/** \brief Possible states for the an address (RFC 4862) */
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#define ADDR_TENTATIVE 0
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#define ADDR_PREFERRED 1
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#define ADDR_DEPRECATED 2
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/** \brief How the address was acquired: Autoconf, DHCP or manually */
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#define ADDR_ANYTYPE 0
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#define ADDR_AUTOCONF 1
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#define ADDR_DHCP 2
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#define ADDR_MANUAL 3
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/** \brief General DS6 definitions */
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#define UIP_DS6_PERIOD (CLOCK_SECOND/10) /** Period for uip-ds6 periodic task*/
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#define FOUND 0
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#define FREESPACE 1
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#define NOSPACE 2
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/*--------------------------------------------------*/
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#if UIP_CONF_IPV6_QUEUE_PKT
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#include "net/uip-packetqueue.h"
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#endif /*UIP_CONF_QUEUE_PKT */
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/** \brief An entry in the nbr cache */
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typedef struct uip_ds6_nbr {
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uint8_t isused;
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uip_ipaddr_t ipaddr;
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uip_lladdr_t lladdr;
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struct stimer reachable;
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struct stimer sendns;
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clock_time_t last_lookup;
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uint8_t nscount;
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uint8_t isrouter;
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uint8_t state;
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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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/** \brief A prefix list entry */
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#if UIP_CONF_ROUTER
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typedef struct uip_ds6_prefix {
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uint8_t isused;
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uip_ipaddr_t ipaddr;
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uint8_t length;
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uint8_t advertise;
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uint32_t vlifetime;
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uint32_t plifetime;
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uint8_t l_a_reserved; /**< on-link and autonomous flags + 6 reserved bits */
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} uip_ds6_prefix_t;
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#else /* UIP_CONF_ROUTER */
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typedef struct uip_ds6_prefix {
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uint8_t isused;
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uip_ipaddr_t ipaddr;
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uint8_t length;
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struct stimer vlifetime;
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uint8_t isinfinite;
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} uip_ds6_prefix_t;
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#endif /*UIP_CONF_ROUTER */
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/** * \brief Unicast address structure */
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typedef struct uip_ds6_addr {
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uint8_t isused;
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uip_ipaddr_t ipaddr;
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uint8_t state;
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uint8_t type;
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uint8_t isinfinite;
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struct stimer vlifetime;
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#if UIP_ND6_DEF_MAXDADNS > 0
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struct timer dadtimer;
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uint8_t dadnscount;
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#endif /* UIP_ND6_DEF_MAXDADNS > 0 */
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} uip_ds6_addr_t;
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/** \brief Anycast address */
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typedef struct uip_ds6_aaddr {
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uint8_t isused;
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uip_ipaddr_t ipaddr;
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} uip_ds6_aaddr_t;
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/** \brief A multicast address */
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typedef struct uip_ds6_maddr {
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uint8_t isused;
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uip_ipaddr_t ipaddr;
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} uip_ds6_maddr_t;
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/* only define the callback if RPL is active */
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#if UIP_CONF_IPV6_RPL
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#ifndef UIP_CONF_DS6_NEIGHBOR_STATE_CHANGED
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#define UIP_CONF_DS6_NEIGHBOR_STATE_CHANGED rpl_ipv6_neighbor_callback
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#endif /* UIP_CONF_DS6_NEIGHBOR_STATE_CHANGED */
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#endif /* UIP_CONF_IPV6_RPL */
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/** \brief Interface structure (contains all the interface variables) */
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typedef struct uip_ds6_netif {
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uint32_t link_mtu;
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uint8_t cur_hop_limit;
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uint32_t base_reachable_time; /* in msec */
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uint32_t reachable_time; /* in msec */
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uint32_t retrans_timer; /* in msec */
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uint8_t maxdadns;
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uip_ds6_addr_t addr_list[UIP_DS6_ADDR_NB];
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uip_ds6_aaddr_t aaddr_list[UIP_DS6_AADDR_NB];
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uip_ds6_maddr_t maddr_list[UIP_DS6_MADDR_NB];
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} uip_ds6_netif_t;
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/** \brief Generic type for a DS6, to use a common loop though all DS */
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typedef struct uip_ds6_element {
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uint8_t isused;
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uip_ipaddr_t ipaddr;
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} uip_ds6_element_t;
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/*---------------------------------------------------------------------------*/
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extern uip_ds6_netif_t uip_ds6_if;
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extern struct etimer uip_ds6_timer_periodic;
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#if UIP_CONF_ROUTER
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extern uip_ds6_prefix_t uip_ds6_prefix_list[UIP_DS6_PREFIX_NB];
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#else /* UIP_CONF_ROUTER */
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extern struct etimer uip_ds6_timer_rs;
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#endif /* UIP_CONF_ROUTER */
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/*---------------------------------------------------------------------------*/
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/** \brief Initialize data structures */
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void uip_ds6_init(void);
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/** \brief Periodic processing of data structures */
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void uip_ds6_periodic(void);
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/** \brief Generic loop routine on an abstract data structure, which generalizes
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* all data structures used in DS6 */
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uint8_t uip_ds6_list_loop(uip_ds6_element_t *list, uint8_t size,
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uint16_t elementsize, uip_ipaddr_t *ipaddr,
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uint8_t ipaddrlen,
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uip_ds6_element_t **out_element);
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/** \name Neighbor Cache basic routines */
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/** @{ */
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uip_ds6_nbr_t *uip_ds6_nbr_add(uip_ipaddr_t *ipaddr, uip_lladdr_t *lladdr,
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uint8_t isrouter, uint8_t state);
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void uip_ds6_nbr_rm(uip_ds6_nbr_t *nbr);
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uip_ds6_nbr_t *uip_ds6_nbr_lookup(uip_ipaddr_t *ipaddr);
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uip_ds6_nbr_t *uip_ds6_nbr_ll_lookup(uip_lladdr_t *lladdr);
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/** @} */
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/** \name Prefix list basic routines */
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/** @{ */
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#if UIP_CONF_ROUTER
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uip_ds6_prefix_t *uip_ds6_prefix_add(uip_ipaddr_t *ipaddr, uint8_t length,
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uint8_t advertise, uint8_t flags,
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unsigned long vtime,
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unsigned long ptime);
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#else /* UIP_CONF_ROUTER */
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uip_ds6_prefix_t *uip_ds6_prefix_add(uip_ipaddr_t *ipaddr, uint8_t length,
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unsigned long interval);
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#endif /* UIP_CONF_ROUTER */
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void uip_ds6_prefix_rm(uip_ds6_prefix_t *prefix);
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uip_ds6_prefix_t *uip_ds6_prefix_lookup(uip_ipaddr_t *ipaddr,
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uint8_t ipaddrlen);
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uint8_t uip_ds6_is_addr_onlink(uip_ipaddr_t *ipaddr);
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/** @} */
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/** \name Unicast address list basic routines */
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/** @{ */
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uip_ds6_addr_t *uip_ds6_addr_add(uip_ipaddr_t *ipaddr,
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unsigned long vlifetime, uint8_t type);
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void uip_ds6_addr_rm(uip_ds6_addr_t *addr);
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uip_ds6_addr_t *uip_ds6_addr_lookup(uip_ipaddr_t *ipaddr);
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uip_ds6_addr_t *uip_ds6_get_link_local(int8_t state);
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uip_ds6_addr_t *uip_ds6_get_global(int8_t state);
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/** @} */
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/** \name Multicast address list basic routines */
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/** @{ */
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uip_ds6_maddr_t *uip_ds6_maddr_add(const uip_ipaddr_t *ipaddr);
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void uip_ds6_maddr_rm(uip_ds6_maddr_t *maddr);
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uip_ds6_maddr_t *uip_ds6_maddr_lookup(const uip_ipaddr_t *ipaddr);
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/** @} */
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/** \name Anycast address list basic routines */
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/** @{ */
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uip_ds6_aaddr_t *uip_ds6_aaddr_add(uip_ipaddr_t *ipaddr);
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void uip_ds6_aaddr_rm(uip_ds6_aaddr_t *aaddr);
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uip_ds6_aaddr_t *uip_ds6_aaddr_lookup(uip_ipaddr_t *ipaddr);
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/** @} */
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/** \brief set the last 64 bits of an IP address based on the MAC address */
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void uip_ds6_set_addr_iid(uip_ipaddr_t *ipaddr, uip_lladdr_t *lladdr);
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/** \brief Get the number of matching bits of two addresses */
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uint8_t get_match_length(uip_ipaddr_t *src, uip_ipaddr_t *dst);
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#if UIP_ND6_DEF_MAXDADNS >0
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/** \brief Perform Duplicate Address Selection on one address */
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void uip_ds6_dad(uip_ds6_addr_t *ifaddr);
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/** \brief Callback when DAD failed */
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int uip_ds6_dad_failed(uip_ds6_addr_t *ifaddr);
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#endif /* UIP_ND6_DEF_MAXDADNS */
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/** \brief Source address selection, see RFC 3484 */
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void uip_ds6_select_src(uip_ipaddr_t *src, uip_ipaddr_t *dst);
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#if UIP_CONF_ROUTER
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#if UIP_ND6_SEND_RA
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/** \brief Send a RA as an asnwer to a RS */
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void uip_ds6_send_ra_sollicited(void);
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/** \brief Send a periodic RA */
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void uip_ds6_send_ra_periodic(void);
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#endif /* UIP_ND6_SEND_RA */
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#else /* UIP_CONF_ROUTER */
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/** \brief Send periodic RS to find router */
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void uip_ds6_send_rs(void);
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#endif /* UIP_CONF_ROUTER */
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/** \brief Compute the reachable time based on base reachable time, see RFC 4861*/
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uint32_t uip_ds6_compute_reachable_time(void); /** \brief compute random reachable timer */
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/** \name Macros to check if an IP address (unicast, multicast or anycast) is mine */
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/** @{ */
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#define uip_ds6_is_my_addr(addr) (uip_ds6_addr_lookup(addr) != NULL)
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#define uip_ds6_is_my_maddr(addr) (uip_ds6_maddr_lookup(addr) != NULL)
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#define uip_ds6_is_my_aaddr(addr) (uip_ds6_aaddr_lookup(addr) != NULL)
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/** @} */
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/** @} */
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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_H__ */
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