mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-08-16 22:28:59 +00:00
320 lines
9.2 KiB
C
320 lines
9.2 KiB
C
/**
|
|
* \addtogroup uip6
|
|
* @{
|
|
*/
|
|
/*
|
|
* Copyright (c) 2009, 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
|
|
* ContikiRPL, an implementation of RPL: IPv6 Routing Protocol
|
|
* for Low-Power and Lossy Networks (IETF RFC 6550)
|
|
*
|
|
* \author Joakim Eriksson <joakime@sics.se>, Nicolas Tsiftes <nvt@sics.se>
|
|
*/
|
|
|
|
#include "net/ip/uip.h"
|
|
#include "net/ip/tcpip.h"
|
|
#include "net/ipv6/uip-ds6.h"
|
|
#include "net/ipv6/uip-icmp6.h"
|
|
#include "net/rpl/rpl-private.h"
|
|
#include "net/ipv6/multicast/uip-mcast6.h"
|
|
|
|
#define DEBUG DEBUG_NONE
|
|
#include "net/ip/uip-debug.h"
|
|
|
|
#include <limits.h>
|
|
#include <string.h>
|
|
|
|
#if UIP_CONF_IPV6
|
|
|
|
#if RPL_CONF_STATS
|
|
rpl_stats_t rpl_stats;
|
|
#endif
|
|
|
|
static enum rpl_mode mode = RPL_MODE_MESH;
|
|
/*---------------------------------------------------------------------------*/
|
|
enum rpl_mode
|
|
rpl_get_mode(void)
|
|
{
|
|
return mode;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
enum rpl_mode
|
|
rpl_set_mode(enum rpl_mode m)
|
|
{
|
|
enum rpl_mode oldmode = mode;
|
|
|
|
/* We need to do different things depending on what mode we are
|
|
switching to. */
|
|
if(m == RPL_MODE_MESH) {
|
|
|
|
/* If we switcht to mesh mode, we should send out a DAO message to
|
|
inform our parent that we now are reachable. Before we do this,
|
|
we must set the mode variable, since DAOs will not be send if
|
|
we are in feather mode. */
|
|
PRINTF("RPL: switching to mesh mode\n");
|
|
mode = m;
|
|
|
|
if(default_instance != NULL) {
|
|
rpl_schedule_dao_immediately(default_instance);
|
|
}
|
|
} else if(m == RPL_MODE_FEATHER) {
|
|
|
|
PRINTF("RPL: switching to feather mode\n");
|
|
mode = m;
|
|
if(default_instance != NULL) {
|
|
rpl_cancel_dao(default_instance);
|
|
}
|
|
|
|
} else {
|
|
mode = m;
|
|
}
|
|
|
|
return oldmode;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
rpl_purge_routes(void)
|
|
{
|
|
uip_ds6_route_t *r;
|
|
uip_ipaddr_t prefix;
|
|
rpl_dag_t *dag;
|
|
#if RPL_CONF_MULTICAST
|
|
uip_mcast6_route_t *mcast_route;
|
|
#endif
|
|
|
|
/* First pass, decrement lifetime */
|
|
r = uip_ds6_route_head();
|
|
|
|
while(r != NULL) {
|
|
if(r->state.lifetime >= 1) {
|
|
/*
|
|
* If a route is at lifetime == 1, set it to 0, scheduling it for
|
|
* immediate removal below. This achieves the same as the original code,
|
|
* which would delete lifetime <= 1
|
|
*/
|
|
r->state.lifetime--;
|
|
}
|
|
r = uip_ds6_route_next(r);
|
|
}
|
|
|
|
/* Second pass, remove dead routes */
|
|
r = uip_ds6_route_head();
|
|
|
|
while(r != NULL) {
|
|
if(r->state.lifetime < 1) {
|
|
/* Routes with lifetime == 1 have only just been decremented from 2 to 1,
|
|
* thus we want to keep them. Hence < and not <= */
|
|
uip_ipaddr_copy(&prefix, &r->ipaddr);
|
|
uip_ds6_route_rm(r);
|
|
r = uip_ds6_route_head();
|
|
PRINTF("No more routes to ");
|
|
PRINT6ADDR(&prefix);
|
|
dag = default_instance->current_dag;
|
|
/* Propagate this information with a No-Path DAO to preferred parent if we are not a RPL Root */
|
|
if(dag->rank != ROOT_RANK(default_instance)) {
|
|
PRINTF(" -> generate No-Path DAO\n");
|
|
dao_output_target(dag->preferred_parent, &prefix, RPL_ZERO_LIFETIME);
|
|
/* Don't schedule more than 1 No-Path DAO, let next iteration handle that */
|
|
return;
|
|
}
|
|
PRINTF("\n");
|
|
} else {
|
|
r = uip_ds6_route_next(r);
|
|
}
|
|
}
|
|
|
|
#if RPL_CONF_MULTICAST
|
|
mcast_route = uip_mcast6_route_list_head();
|
|
|
|
while(mcast_route != NULL) {
|
|
if(mcast_route->lifetime <= 1) {
|
|
uip_mcast6_route_rm(mcast_route);
|
|
mcast_route = uip_mcast6_route_list_head();
|
|
} else {
|
|
mcast_route->lifetime--;
|
|
mcast_route = list_item_next(mcast_route);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
rpl_remove_routes(rpl_dag_t *dag)
|
|
{
|
|
uip_ds6_route_t *r;
|
|
#if RPL_CONF_MULTICAST
|
|
uip_mcast6_route_t *mcast_route;
|
|
#endif
|
|
|
|
r = uip_ds6_route_head();
|
|
|
|
while(r != NULL) {
|
|
if(r->state.dag == dag) {
|
|
uip_ds6_route_rm(r);
|
|
r = uip_ds6_route_head();
|
|
} else {
|
|
r = uip_ds6_route_next(r);
|
|
}
|
|
}
|
|
|
|
#if RPL_CONF_MULTICAST
|
|
mcast_route = uip_mcast6_route_list_head();
|
|
|
|
while(mcast_route != NULL) {
|
|
if(mcast_route->dag == dag) {
|
|
uip_mcast6_route_rm(mcast_route);
|
|
mcast_route = uip_mcast6_route_list_head();
|
|
} else {
|
|
mcast_route = list_item_next(mcast_route);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
rpl_remove_routes_by_nexthop(uip_ipaddr_t *nexthop, rpl_dag_t *dag)
|
|
{
|
|
uip_ds6_route_t *r;
|
|
|
|
r = uip_ds6_route_head();
|
|
|
|
while(r != NULL) {
|
|
if(uip_ipaddr_cmp(uip_ds6_route_nexthop(r), nexthop) &&
|
|
r->state.dag == dag) {
|
|
uip_ds6_route_rm(r);
|
|
r = uip_ds6_route_head();
|
|
} else {
|
|
r = uip_ds6_route_next(r);
|
|
}
|
|
}
|
|
ANNOTATE("#L %u 0\n", nexthop->u8[sizeof(uip_ipaddr_t) - 1]);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
uip_ds6_route_t *
|
|
rpl_add_route(rpl_dag_t *dag, uip_ipaddr_t *prefix, int prefix_len,
|
|
uip_ipaddr_t *next_hop)
|
|
{
|
|
uip_ds6_route_t *rep;
|
|
|
|
if((rep = uip_ds6_route_add(prefix, prefix_len, next_hop)) == NULL) {
|
|
PRINTF("RPL: No space for more route entries\n");
|
|
return NULL;
|
|
}
|
|
|
|
rep->state.dag = dag;
|
|
rep->state.lifetime = RPL_LIFETIME(dag->instance, dag->instance->default_lifetime);
|
|
rep->state.learned_from = RPL_ROUTE_FROM_INTERNAL;
|
|
|
|
PRINTF("RPL: Added a route to ");
|
|
PRINT6ADDR(prefix);
|
|
PRINTF("/%d via ", prefix_len);
|
|
PRINT6ADDR(next_hop);
|
|
PRINTF("\n");
|
|
|
|
return rep;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
rpl_link_neighbor_callback(const linkaddr_t *addr, int status, int numtx)
|
|
{
|
|
uip_ipaddr_t ipaddr;
|
|
rpl_parent_t *parent;
|
|
rpl_instance_t *instance;
|
|
rpl_instance_t *end;
|
|
|
|
uip_ip6addr(&ipaddr, 0xfe80, 0, 0, 0, 0, 0, 0, 0);
|
|
uip_ds6_set_addr_iid(&ipaddr, (uip_lladdr_t *)addr);
|
|
|
|
for(instance = &instance_table[0], end = instance + RPL_MAX_INSTANCES; instance < end; ++instance) {
|
|
if(instance->used == 1 ) {
|
|
parent = rpl_find_parent_any_dag(instance, &ipaddr);
|
|
if(parent != NULL) {
|
|
/* Trigger DAG rank recalculation. */
|
|
PRINTF("RPL: rpl_link_neighbor_callback triggering update\n");
|
|
parent->flags |= RPL_PARENT_FLAG_UPDATED;
|
|
if(instance->of->neighbor_link_callback != NULL) {
|
|
instance->of->neighbor_link_callback(parent, status, numtx);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
rpl_ipv6_neighbor_callback(uip_ds6_nbr_t *nbr)
|
|
{
|
|
rpl_parent_t *p;
|
|
rpl_instance_t *instance;
|
|
rpl_instance_t *end;
|
|
|
|
PRINTF("RPL: Removing neighbor ");
|
|
PRINT6ADDR(&nbr->ipaddr);
|
|
PRINTF("\n");
|
|
for(instance = &instance_table[0], end = instance + RPL_MAX_INSTANCES; instance < end; ++instance) {
|
|
if(instance->used == 1 ) {
|
|
p = rpl_find_parent_any_dag(instance, &nbr->ipaddr);
|
|
if(p != NULL) {
|
|
p->rank = INFINITE_RANK;
|
|
/* Trigger DAG rank recalculation. */
|
|
PRINTF("RPL: rpl_ipv6_neighbor_callback infinite rank\n");
|
|
p->flags |= RPL_PARENT_FLAG_UPDATED;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
rpl_init(void)
|
|
{
|
|
uip_ipaddr_t rplmaddr;
|
|
PRINTF("RPL started\n");
|
|
default_instance = NULL;
|
|
|
|
rpl_dag_init();
|
|
rpl_reset_periodic_timer();
|
|
rpl_icmp6_register_handlers();
|
|
|
|
/* add rpl multicast address */
|
|
uip_create_linklocal_rplnodes_mcast(&rplmaddr);
|
|
uip_ds6_maddr_add(&rplmaddr);
|
|
|
|
#if RPL_CONF_STATS
|
|
memset(&rpl_stats, 0, sizeof(rpl_stats));
|
|
#endif
|
|
|
|
RPL_OF.reset(NULL);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
#endif /* UIP_CONF_IPV6 */
|
|
|
|
/** @}*/
|