324 lines
12 KiB
C
324 lines
12 KiB
C
/*
|
|
* Copyright (c) 2010, Swedish Institute of Computer Science.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* This file is part of the Contiki operating system.
|
|
*
|
|
* \file
|
|
* Private declarations for ContikiRPL.
|
|
* \author
|
|
* Joakim Eriksson <joakime@sics.se>, Nicolas Tsiftes <nvt@sics.se>
|
|
*/
|
|
|
|
#ifndef RPL_PRIVATE_H
|
|
#define RPL_PRIVATE_H
|
|
|
|
#include "net/rpl/rpl.h"
|
|
|
|
#include "lib/list.h"
|
|
#include "net/ip/uip.h"
|
|
#include "sys/clock.h"
|
|
#include "sys/ctimer.h"
|
|
#include "net/ipv6/uip-ds6.h"
|
|
#include "net/ipv6/multicast/uip-mcast6.h"
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** \brief Is IPv6 address addr the link-local, all-RPL-nodes
|
|
multicast address? */
|
|
#define uip_is_addr_linklocal_rplnodes_mcast(addr) \
|
|
((addr)->u8[0] == 0xff) && \
|
|
((addr)->u8[1] == 0x02) && \
|
|
((addr)->u16[1] == 0) && \
|
|
((addr)->u16[2] == 0) && \
|
|
((addr)->u16[3] == 0) && \
|
|
((addr)->u16[4] == 0) && \
|
|
((addr)->u16[5] == 0) && \
|
|
((addr)->u16[6] == 0) && \
|
|
((addr)->u8[14] == 0) && \
|
|
((addr)->u8[15] == 0x1a))
|
|
|
|
/** \brief Set IP address addr to the link-local, all-rpl-nodes
|
|
multicast address. */
|
|
#define uip_create_linklocal_rplnodes_mcast(addr) \
|
|
uip_ip6addr((addr), 0xff02, 0, 0, 0, 0, 0, 0, 0x001a)
|
|
/*---------------------------------------------------------------------------*/
|
|
/* RPL message types */
|
|
#define RPL_CODE_DIS 0x00 /* DAG Information Solicitation */
|
|
#define RPL_CODE_DIO 0x01 /* DAG Information Option */
|
|
#define RPL_CODE_DAO 0x02 /* Destination Advertisement Option */
|
|
#define RPL_CODE_DAO_ACK 0x03 /* DAO acknowledgment */
|
|
#define RPL_CODE_SEC_DIS 0x80 /* Secure DIS */
|
|
#define RPL_CODE_SEC_DIO 0x81 /* Secure DIO */
|
|
#define RPL_CODE_SEC_DAO 0x82 /* Secure DAO */
|
|
#define RPL_CODE_SEC_DAO_ACK 0x83 /* Secure DAO ACK */
|
|
|
|
/* RPL control message options. */
|
|
#define RPL_OPTION_PAD1 0
|
|
#define RPL_OPTION_PADN 1
|
|
#define RPL_OPTION_DAG_METRIC_CONTAINER 2
|
|
#define RPL_OPTION_ROUTE_INFO 3
|
|
#define RPL_OPTION_DAG_CONF 4
|
|
#define RPL_OPTION_TARGET 5
|
|
#define RPL_OPTION_TRANSIT 6
|
|
#define RPL_OPTION_SOLICITED_INFO 7
|
|
#define RPL_OPTION_PREFIX_INFO 8
|
|
#define RPL_OPTION_TARGET_DESC 9
|
|
|
|
#define RPL_DAO_K_FLAG 0x80 /* DAO ACK requested */
|
|
#define RPL_DAO_D_FLAG 0x40 /* DODAG ID present */
|
|
/*---------------------------------------------------------------------------*/
|
|
/* RPL IPv6 extension header option. */
|
|
#define RPL_HDR_OPT_LEN 4
|
|
#define RPL_HOP_BY_HOP_LEN (RPL_HDR_OPT_LEN + 2 + 2)
|
|
#define RPL_HDR_OPT_DOWN 0x80
|
|
#define RPL_HDR_OPT_DOWN_SHIFT 7
|
|
#define RPL_HDR_OPT_RANK_ERR 0x40
|
|
#define RPL_HDR_OPT_RANK_ERR_SHIFT 6
|
|
#define RPL_HDR_OPT_FWD_ERR 0x20
|
|
#define RPL_HDR_OPT_FWD_ERR_SHIFT 5
|
|
/*---------------------------------------------------------------------------*/
|
|
/* Default values for RPL constants and variables. */
|
|
|
|
/* The default value for the DAO timer. */
|
|
#ifdef RPL_CONF_DAO_LATENCY
|
|
#define RPL_DAO_LATENCY RPL_CONF_DAO_LATENCY
|
|
#else /* RPL_CONF_DAO_LATENCY */
|
|
#define RPL_DAO_LATENCY (CLOCK_SECOND * 4)
|
|
#endif /* RPL_DAO_LATENCY */
|
|
|
|
/* Special value indicating immediate removal. */
|
|
#define RPL_ZERO_LIFETIME 0
|
|
|
|
#define RPL_LIFETIME(instance, lifetime) \
|
|
((unsigned long)(instance)->lifetime_unit * (lifetime))
|
|
|
|
#ifndef RPL_CONF_MIN_HOPRANKINC
|
|
#define RPL_MIN_HOPRANKINC 256
|
|
#else
|
|
#define RPL_MIN_HOPRANKINC RPL_CONF_MIN_HOPRANKINC
|
|
#endif
|
|
#define RPL_MAX_RANKINC (7 * RPL_MIN_HOPRANKINC)
|
|
|
|
#define DAG_RANK(fixpt_rank, instance) \
|
|
((fixpt_rank) / (instance)->min_hoprankinc)
|
|
|
|
/* Rank of a virtual root node that coordinates DAG root nodes. */
|
|
#define BASE_RANK 0
|
|
|
|
/* Rank of a root node. */
|
|
#define ROOT_RANK(instance) (instance)->min_hoprankinc
|
|
|
|
#define INFINITE_RANK 0xffff
|
|
|
|
|
|
/* Expire DAOs from neighbors that do not respond in this time. (seconds) */
|
|
#define DAO_EXPIRATION_TIMEOUT 60
|
|
/*---------------------------------------------------------------------------*/
|
|
#define RPL_INSTANCE_LOCAL_FLAG 0x80
|
|
#define RPL_INSTANCE_D_FLAG 0x40
|
|
|
|
/* Values that tell where a route came from. */
|
|
#define RPL_ROUTE_FROM_INTERNAL 0
|
|
#define RPL_ROUTE_FROM_UNICAST_DAO 1
|
|
#define RPL_ROUTE_FROM_MULTICAST_DAO 2
|
|
#define RPL_ROUTE_FROM_DIO 3
|
|
|
|
/* DAG Mode of Operation */
|
|
#define RPL_MOP_NO_DOWNWARD_ROUTES 0
|
|
#define RPL_MOP_NON_STORING 1
|
|
#define RPL_MOP_STORING_NO_MULTICAST 2
|
|
#define RPL_MOP_STORING_MULTICAST 3
|
|
|
|
#ifdef RPL_CONF_MOP
|
|
#define RPL_MOP_DEFAULT RPL_CONF_MOP
|
|
#else /* RPL_CONF_MOP */
|
|
#if RPL_CONF_MULTICAST
|
|
#define RPL_MOP_DEFAULT RPL_MOP_STORING_MULTICAST
|
|
#else
|
|
#define RPL_MOP_DEFAULT RPL_MOP_STORING_NO_MULTICAST
|
|
#endif /* UIP_IPV6_MULTICAST_RPL */
|
|
#endif /* RPL_CONF_MOP */
|
|
|
|
/* Emit a pre-processor error if the user configured multicast with bad MOP */
|
|
#if RPL_CONF_MULTICAST && (RPL_MOP_DEFAULT != RPL_MOP_STORING_MULTICAST)
|
|
#error "RPL Multicast requires RPL_MOP_DEFAULT==3. Check contiki-conf.h"
|
|
#endif
|
|
|
|
/* Multicast Route Lifetime as a multiple of the lifetime unit */
|
|
#ifdef RPL_CONF_MCAST_LIFETIME
|
|
#define RPL_MCAST_LIFETIME RPL_CONF_MCAST_LIFETIME
|
|
#else
|
|
#define RPL_MCAST_LIFETIME 3
|
|
#endif
|
|
|
|
/*
|
|
* The ETX in the metric container is expressed as a fixed-point value
|
|
* whose integer part can be obtained by dividing the value by
|
|
* RPL_DAG_MC_ETX_DIVISOR.
|
|
*/
|
|
#define RPL_DAG_MC_ETX_DIVISOR 256
|
|
|
|
/* DIS related */
|
|
#define RPL_DIS_SEND 1
|
|
#ifdef RPL_DIS_INTERVAL_CONF
|
|
#define RPL_DIS_INTERVAL RPL_DIS_INTERVAL_CONF
|
|
#else
|
|
#define RPL_DIS_INTERVAL 60
|
|
#endif
|
|
#define RPL_DIS_START_DELAY 5
|
|
/*---------------------------------------------------------------------------*/
|
|
/* Lollipop counters */
|
|
|
|
#define RPL_LOLLIPOP_MAX_VALUE 255
|
|
#define RPL_LOLLIPOP_CIRCULAR_REGION 127
|
|
#define RPL_LOLLIPOP_SEQUENCE_WINDOWS 16
|
|
#define RPL_LOLLIPOP_INIT (RPL_LOLLIPOP_MAX_VALUE - RPL_LOLLIPOP_SEQUENCE_WINDOWS + 1)
|
|
#define RPL_LOLLIPOP_INCREMENT(counter) \
|
|
do { \
|
|
if((counter) > RPL_LOLLIPOP_CIRCULAR_REGION) { \
|
|
(counter) = ((counter) + 1) & RPL_LOLLIPOP_MAX_VALUE; \
|
|
} else { \
|
|
(counter) = ((counter) + 1) & RPL_LOLLIPOP_CIRCULAR_REGION; \
|
|
} \
|
|
} while(0)
|
|
|
|
#define RPL_LOLLIPOP_IS_INIT(counter) \
|
|
((counter) > RPL_LOLLIPOP_CIRCULAR_REGION)
|
|
/*---------------------------------------------------------------------------*/
|
|
/* Logical representation of a DAG Information Object (DIO.) */
|
|
struct rpl_dio {
|
|
uip_ipaddr_t dag_id;
|
|
rpl_ocp_t ocp;
|
|
rpl_rank_t rank;
|
|
uint8_t grounded;
|
|
uint8_t mop;
|
|
uint8_t preference;
|
|
uint8_t version;
|
|
uint8_t instance_id;
|
|
uint8_t dtsn;
|
|
uint8_t dag_intdoubl;
|
|
uint8_t dag_intmin;
|
|
uint8_t dag_redund;
|
|
uint8_t default_lifetime;
|
|
uint16_t lifetime_unit;
|
|
rpl_rank_t dag_max_rankinc;
|
|
rpl_rank_t dag_min_hoprankinc;
|
|
rpl_prefix_t destination_prefix;
|
|
rpl_prefix_t prefix_info;
|
|
struct rpl_metric_container mc;
|
|
};
|
|
typedef struct rpl_dio rpl_dio_t;
|
|
|
|
#if RPL_CONF_STATS
|
|
/* Statistics for fault management. */
|
|
struct rpl_stats {
|
|
uint16_t mem_overflows;
|
|
uint16_t local_repairs;
|
|
uint16_t global_repairs;
|
|
uint16_t malformed_msgs;
|
|
uint16_t resets;
|
|
uint16_t parent_switch;
|
|
uint16_t forward_errors;
|
|
uint16_t loop_errors;
|
|
uint16_t loop_warnings;
|
|
uint16_t root_repairs;
|
|
};
|
|
typedef struct rpl_stats rpl_stats_t;
|
|
|
|
extern rpl_stats_t rpl_stats;
|
|
#endif
|
|
/*---------------------------------------------------------------------------*/
|
|
/* RPL macros. */
|
|
|
|
#if RPL_CONF_STATS
|
|
#define RPL_STAT(code) (code)
|
|
#else
|
|
#define RPL_STAT(code)
|
|
#endif /* RPL_CONF_STATS */
|
|
/*---------------------------------------------------------------------------*/
|
|
/* Instances */
|
|
extern rpl_instance_t instance_table[];
|
|
extern rpl_instance_t *default_instance;
|
|
|
|
/* ICMPv6 functions for RPL. */
|
|
void dis_output(uip_ipaddr_t *addr);
|
|
void dio_output(rpl_instance_t *, uip_ipaddr_t *uc_addr);
|
|
void dao_output(rpl_parent_t *, uint8_t lifetime);
|
|
void dao_output_target(rpl_parent_t *, uip_ipaddr_t *, uint8_t lifetime);
|
|
void dao_ack_output(rpl_instance_t *, uip_ipaddr_t *, uint8_t);
|
|
void rpl_icmp6_register_handlers(void);
|
|
|
|
/* RPL logic functions. */
|
|
void rpl_join_dag(uip_ipaddr_t *from, rpl_dio_t *dio);
|
|
void rpl_join_instance(uip_ipaddr_t *from, rpl_dio_t *dio);
|
|
void rpl_local_repair(rpl_instance_t *instance);
|
|
void rpl_process_dio(uip_ipaddr_t *, rpl_dio_t *);
|
|
int rpl_process_parent_event(rpl_instance_t *, rpl_parent_t *);
|
|
|
|
/* DAG object management. */
|
|
rpl_dag_t *rpl_alloc_dag(uint8_t, uip_ipaddr_t *);
|
|
rpl_instance_t *rpl_alloc_instance(uint8_t);
|
|
void rpl_free_dag(rpl_dag_t *);
|
|
void rpl_free_instance(rpl_instance_t *);
|
|
|
|
/* DAG parent management function. */
|
|
rpl_parent_t *rpl_add_parent(rpl_dag_t *, rpl_dio_t *dio, uip_ipaddr_t *);
|
|
rpl_parent_t *rpl_find_parent(rpl_dag_t *, uip_ipaddr_t *);
|
|
rpl_parent_t *rpl_find_parent_any_dag(rpl_instance_t *instance, uip_ipaddr_t *addr);
|
|
void rpl_nullify_parent(rpl_parent_t *);
|
|
void rpl_remove_parent(rpl_parent_t *);
|
|
void rpl_move_parent(rpl_dag_t *dag_src, rpl_dag_t *dag_dst, rpl_parent_t *parent);
|
|
rpl_parent_t *rpl_select_parent(rpl_dag_t *dag);
|
|
rpl_dag_t *rpl_select_dag(rpl_instance_t *instance,rpl_parent_t *parent);
|
|
void rpl_recalculate_ranks(void);
|
|
|
|
/* RPL routing table functions. */
|
|
void rpl_remove_routes(rpl_dag_t *dag);
|
|
void rpl_remove_routes_by_nexthop(uip_ipaddr_t *nexthop, rpl_dag_t *dag);
|
|
uip_ds6_route_t *rpl_add_route(rpl_dag_t *dag, uip_ipaddr_t *prefix,
|
|
int prefix_len, uip_ipaddr_t *next_hop);
|
|
void rpl_purge_routes(void);
|
|
|
|
/* Lock a parent in the neighbor cache. */
|
|
void rpl_lock_parent(rpl_parent_t *p);
|
|
|
|
/* Objective function. */
|
|
rpl_of_t *rpl_find_of(rpl_ocp_t);
|
|
|
|
/* Timer functions. */
|
|
void rpl_schedule_dao(rpl_instance_t *);
|
|
void rpl_schedule_dao_immediately(rpl_instance_t *);
|
|
void rpl_cancel_dao(rpl_instance_t *instance);
|
|
|
|
void rpl_reset_dio_timer(rpl_instance_t *);
|
|
void rpl_reset_periodic_timer(void);
|
|
|
|
/* Route poisoning. */
|
|
void rpl_poison_routes(rpl_dag_t *, rpl_parent_t *);
|
|
|
|
#endif /* RPL_PRIVATE_H */
|