343 lines
12 KiB
C
343 lines
12 KiB
C
/*
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* Copyright (c) 2010, 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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* \file
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* Private declarations for ContikiRPL.
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* \author
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* Joakim Eriksson <joakime@sics.se>, Nicolas Tsiftes <nvt@sics.se>
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*/
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#ifndef RPL_PRIVATE_H
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#define RPL_PRIVATE_H
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#include "net/rpl/rpl.h"
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#include "lib/list.h"
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#include "net/ip/uip.h"
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#include "sys/clock.h"
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#include "sys/ctimer.h"
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#include "net/ipv6/uip-ds6.h"
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#include "net/ipv6/multicast/uip-mcast6.h"
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/*---------------------------------------------------------------------------*/
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/** \brief Is IPv6 address addr the link-local, all-RPL-nodes
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multicast address? */
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#define uip_is_addr_linklocal_rplnodes_mcast(addr) \
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((addr)->u8[0] == 0xff) && \
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((addr)->u8[1] == 0x02) && \
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((addr)->u16[1] == 0) && \
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((addr)->u16[2] == 0) && \
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((addr)->u16[3] == 0) && \
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((addr)->u16[4] == 0) && \
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((addr)->u16[5] == 0) && \
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((addr)->u16[6] == 0) && \
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((addr)->u8[14] == 0) && \
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((addr)->u8[15] == 0x1a))
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/** \brief Set IP address addr to the link-local, all-rpl-nodes
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multicast address. */
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#define uip_create_linklocal_rplnodes_mcast(addr) \
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uip_ip6addr((addr), 0xff02, 0, 0, 0, 0, 0, 0, 0x001a)
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/*---------------------------------------------------------------------------*/
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/* RPL message types */
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#define RPL_CODE_DIS 0x00 /* DAG Information Solicitation */
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#define RPL_CODE_DIO 0x01 /* DAG Information Option */
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#define RPL_CODE_DAO 0x02 /* Destination Advertisement Option */
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#define RPL_CODE_DAO_ACK 0x03 /* DAO acknowledgment */
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#define RPL_CODE_SEC_DIS 0x80 /* Secure DIS */
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#define RPL_CODE_SEC_DIO 0x81 /* Secure DIO */
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#define RPL_CODE_SEC_DAO 0x82 /* Secure DAO */
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#define RPL_CODE_SEC_DAO_ACK 0x83 /* Secure DAO ACK */
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/* RPL control message options. */
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#define RPL_OPTION_PAD1 0
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#define RPL_OPTION_PADN 1
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#define RPL_OPTION_DAG_METRIC_CONTAINER 2
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#define RPL_OPTION_ROUTE_INFO 3
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#define RPL_OPTION_DAG_CONF 4
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#define RPL_OPTION_TARGET 5
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#define RPL_OPTION_TRANSIT 6
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#define RPL_OPTION_SOLICITED_INFO 7
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#define RPL_OPTION_PREFIX_INFO 8
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#define RPL_OPTION_TARGET_DESC 9
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#define RPL_DAO_K_FLAG 0x80 /* DAO ACK requested */
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#define RPL_DAO_D_FLAG 0x40 /* DODAG ID present */
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/*---------------------------------------------------------------------------*/
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/* RPL IPv6 extension header option. */
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#define RPL_HDR_OPT_LEN 4
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#define RPL_HOP_BY_HOP_LEN (RPL_HDR_OPT_LEN + 2 + 2)
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#define RPL_HDR_OPT_DOWN 0x80
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#define RPL_HDR_OPT_DOWN_SHIFT 7
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#define RPL_HDR_OPT_RANK_ERR 0x40
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#define RPL_HDR_OPT_RANK_ERR_SHIFT 6
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#define RPL_HDR_OPT_FWD_ERR 0x20
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#define RPL_HDR_OPT_FWD_ERR_SHIFT 5
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/*---------------------------------------------------------------------------*/
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/* Default values for RPL constants and variables. */
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/* The default value for the DAO timer. */
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#ifdef RPL_CONF_DAO_LATENCY
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#define RPL_DAO_LATENCY RPL_CONF_DAO_LATENCY
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#else /* RPL_CONF_DAO_LATENCY */
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#define RPL_DAO_LATENCY (CLOCK_SECOND * 4)
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#endif /* RPL_DAO_LATENCY */
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/* Special value indicating immediate removal. */
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#define RPL_ZERO_LIFETIME 0
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#define RPL_LIFETIME(instance, lifetime) \
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((unsigned long)(instance)->lifetime_unit * (lifetime))
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#ifndef RPL_CONF_MIN_HOPRANKINC
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#define RPL_MIN_HOPRANKINC 256
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#else
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#define RPL_MIN_HOPRANKINC RPL_CONF_MIN_HOPRANKINC
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#endif
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#define RPL_MAX_RANKINC (7 * RPL_MIN_HOPRANKINC)
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#define DAG_RANK(fixpt_rank, instance) \
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((fixpt_rank) / (instance)->min_hoprankinc)
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/* Rank of a virtual root node that coordinates DAG root nodes. */
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#define BASE_RANK 0
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/* Rank of a root node. */
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#define ROOT_RANK(instance) (instance)->min_hoprankinc
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#define INFINITE_RANK 0xffff
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/* Represents 2^n ms. */
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/* Default value according to the specification is 3 which
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means 8 milliseconds, but that is an unreasonable value if
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using power-saving / duty-cycling */
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#ifdef RPL_CONF_DIO_INTERVAL_MIN
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#define RPL_DIO_INTERVAL_MIN RPL_CONF_DIO_INTERVAL_MIN
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#else
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#define RPL_DIO_INTERVAL_MIN 12
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#endif
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/* Maximum amount of timer doublings. */
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#ifdef RPL_CONF_DIO_INTERVAL_DOUBLINGS
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#define RPL_DIO_INTERVAL_DOUBLINGS RPL_CONF_DIO_INTERVAL_DOUBLINGS
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#else
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#define RPL_DIO_INTERVAL_DOUBLINGS 8
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#endif
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/* Default DIO redundancy. */
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#ifdef RPL_CONF_DIO_REDUNDANCY
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#define RPL_DIO_REDUNDANCY RPL_CONF_DIO_REDUNDANCY
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#else
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#define RPL_DIO_REDUNDANCY 10
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#endif
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/* Expire DAOs from neighbors that do not respond in this time. (seconds) */
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#define DAO_EXPIRATION_TIMEOUT 60
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/*---------------------------------------------------------------------------*/
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#define RPL_INSTANCE_LOCAL_FLAG 0x80
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#define RPL_INSTANCE_D_FLAG 0x40
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/* Values that tell where a route came from. */
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#define RPL_ROUTE_FROM_INTERNAL 0
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#define RPL_ROUTE_FROM_UNICAST_DAO 1
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#define RPL_ROUTE_FROM_MULTICAST_DAO 2
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#define RPL_ROUTE_FROM_DIO 3
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/* DAG Mode of Operation */
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#define RPL_MOP_NO_DOWNWARD_ROUTES 0
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#define RPL_MOP_NON_STORING 1
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#define RPL_MOP_STORING_NO_MULTICAST 2
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#define RPL_MOP_STORING_MULTICAST 3
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#ifdef RPL_CONF_MOP
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#define RPL_MOP_DEFAULT RPL_CONF_MOP
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#else /* RPL_CONF_MOP */
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#if RPL_CONF_MULTICAST
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#define RPL_MOP_DEFAULT RPL_MOP_STORING_MULTICAST
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#else
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#define RPL_MOP_DEFAULT RPL_MOP_STORING_NO_MULTICAST
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#endif /* UIP_IPV6_MULTICAST_RPL */
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#endif /* RPL_CONF_MOP */
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/* Emit a pre-processor error if the user configured multicast with bad MOP */
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#if RPL_CONF_MULTICAST && (RPL_MOP_DEFAULT != RPL_MOP_STORING_MULTICAST)
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#error "RPL Multicast requires RPL_MOP_DEFAULT==3. Check contiki-conf.h"
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#endif
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/* Multicast Route Lifetime as a multiple of the lifetime unit */
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#ifdef RPL_CONF_MCAST_LIFETIME
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#define RPL_MCAST_LIFETIME RPL_CONF_MCAST_LIFETIME
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#else
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#define RPL_MCAST_LIFETIME 3
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#endif
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/*
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* The ETX in the metric container is expressed as a fixed-point value
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* whose integer part can be obtained by dividing the value by
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* RPL_DAG_MC_ETX_DIVISOR.
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*/
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#define RPL_DAG_MC_ETX_DIVISOR 256
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/* DIS related */
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#define RPL_DIS_SEND 1
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#ifdef RPL_DIS_INTERVAL_CONF
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#define RPL_DIS_INTERVAL RPL_DIS_INTERVAL_CONF
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#else
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#define RPL_DIS_INTERVAL 60
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#endif
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#define RPL_DIS_START_DELAY 5
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/*---------------------------------------------------------------------------*/
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/* Lollipop counters */
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#define RPL_LOLLIPOP_MAX_VALUE 255
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#define RPL_LOLLIPOP_CIRCULAR_REGION 127
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#define RPL_LOLLIPOP_SEQUENCE_WINDOWS 16
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#define RPL_LOLLIPOP_INIT (RPL_LOLLIPOP_MAX_VALUE - RPL_LOLLIPOP_SEQUENCE_WINDOWS + 1)
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#define RPL_LOLLIPOP_INCREMENT(counter) \
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do { \
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if((counter) > RPL_LOLLIPOP_CIRCULAR_REGION) { \
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(counter) = ((counter) + 1) & RPL_LOLLIPOP_MAX_VALUE; \
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} else { \
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(counter) = ((counter) + 1) & RPL_LOLLIPOP_CIRCULAR_REGION; \
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} \
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} while(0)
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#define RPL_LOLLIPOP_IS_INIT(counter) \
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((counter) > RPL_LOLLIPOP_CIRCULAR_REGION)
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/*---------------------------------------------------------------------------*/
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/* Logical representation of a DAG Information Object (DIO.) */
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struct rpl_dio {
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uip_ipaddr_t dag_id;
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rpl_ocp_t ocp;
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rpl_rank_t rank;
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uint8_t grounded;
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uint8_t mop;
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uint8_t preference;
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uint8_t version;
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uint8_t instance_id;
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uint8_t dtsn;
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uint8_t dag_intdoubl;
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uint8_t dag_intmin;
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uint8_t dag_redund;
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uint8_t default_lifetime;
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uint16_t lifetime_unit;
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rpl_rank_t dag_max_rankinc;
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rpl_rank_t dag_min_hoprankinc;
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rpl_prefix_t destination_prefix;
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rpl_prefix_t prefix_info;
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struct rpl_metric_container mc;
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};
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typedef struct rpl_dio rpl_dio_t;
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#if RPL_CONF_STATS
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/* Statistics for fault management. */
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struct rpl_stats {
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uint16_t mem_overflows;
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uint16_t local_repairs;
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uint16_t global_repairs;
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uint16_t malformed_msgs;
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uint16_t resets;
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uint16_t parent_switch;
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};
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typedef struct rpl_stats rpl_stats_t;
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extern rpl_stats_t rpl_stats;
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#endif
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/*---------------------------------------------------------------------------*/
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/* RPL macros. */
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#if RPL_CONF_STATS
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#define RPL_STAT(code) (code)
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#else
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#define RPL_STAT(code)
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#endif /* RPL_CONF_STATS */
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/*---------------------------------------------------------------------------*/
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/* Instances */
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extern rpl_instance_t instance_table[];
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extern rpl_instance_t *default_instance;
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/* ICMPv6 functions for RPL. */
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void dis_output(uip_ipaddr_t *addr);
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void dio_output(rpl_instance_t *, uip_ipaddr_t *uc_addr);
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void dao_output(rpl_parent_t *, uint8_t lifetime);
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void dao_output_target(rpl_parent_t *, uip_ipaddr_t *, uint8_t lifetime);
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void dao_ack_output(rpl_instance_t *, uip_ipaddr_t *, uint8_t);
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void rpl_icmp6_register_handlers(void);
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/* RPL logic functions. */
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void rpl_join_dag(uip_ipaddr_t *from, rpl_dio_t *dio);
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void rpl_join_instance(uip_ipaddr_t *from, rpl_dio_t *dio);
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void rpl_local_repair(rpl_instance_t *instance);
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void rpl_process_dio(uip_ipaddr_t *, rpl_dio_t *);
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int rpl_process_parent_event(rpl_instance_t *, rpl_parent_t *);
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/* DAG object management. */
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rpl_dag_t *rpl_alloc_dag(uint8_t, uip_ipaddr_t *);
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rpl_instance_t *rpl_alloc_instance(uint8_t);
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void rpl_free_dag(rpl_dag_t *);
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void rpl_free_instance(rpl_instance_t *);
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/* DAG parent management function. */
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rpl_parent_t *rpl_add_parent(rpl_dag_t *, rpl_dio_t *dio, uip_ipaddr_t *);
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rpl_parent_t *rpl_find_parent(rpl_dag_t *, uip_ipaddr_t *);
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rpl_parent_t *rpl_find_parent_any_dag(rpl_instance_t *instance, uip_ipaddr_t *addr);
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void rpl_nullify_parent(rpl_parent_t *);
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void rpl_remove_parent(rpl_parent_t *);
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void rpl_move_parent(rpl_dag_t *dag_src, rpl_dag_t *dag_dst, rpl_parent_t *parent);
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rpl_parent_t *rpl_select_parent(rpl_dag_t *dag);
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rpl_dag_t *rpl_select_dag(rpl_instance_t *instance,rpl_parent_t *parent);
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void rpl_recalculate_ranks(void);
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/* RPL routing table functions. */
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void rpl_remove_routes(rpl_dag_t *dag);
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void rpl_remove_routes_by_nexthop(uip_ipaddr_t *nexthop, rpl_dag_t *dag);
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uip_ds6_route_t *rpl_add_route(rpl_dag_t *dag, uip_ipaddr_t *prefix,
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int prefix_len, uip_ipaddr_t *next_hop);
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void rpl_purge_routes(void);
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/* Lock a parent in the neighbor cache. */
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void rpl_lock_parent(rpl_parent_t *p);
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/* Objective function. */
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rpl_of_t *rpl_find_of(rpl_ocp_t);
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/* Timer functions. */
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void rpl_schedule_dao(rpl_instance_t *);
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void rpl_schedule_dao_immediately(rpl_instance_t *);
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void rpl_cancel_dao(rpl_instance_t *instance);
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void rpl_reset_dio_timer(rpl_instance_t *);
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void rpl_reset_periodic_timer(void);
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/* Route poisoning. */
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void rpl_poison_routes(rpl_dag_t *, rpl_parent_t *);
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#endif /* RPL_PRIVATE_H */
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