153 lines
4.4 KiB
C
153 lines
4.4 KiB
C
/*
|
|
* Copyright (c) 2016, Inria.
|
|
* 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.
|
|
*/
|
|
|
|
/**
|
|
* \addtogroup rpl-lite
|
|
* @{
|
|
*
|
|
* \file
|
|
* RPL non-storing mode specific functions. Includes support for
|
|
* source routing.
|
|
*
|
|
* \author Simon Duquennoy <simon.duquennoy@inria.fr>
|
|
*/
|
|
|
|
|
|
#ifndef RPL_NS_H
|
|
#define RPL_NS_H
|
|
|
|
/********** Includes **********/
|
|
|
|
#include "net/ipv6/uip.h"
|
|
#include "net/rpl-lite/rpl.h"
|
|
|
|
/********** Data Structures **********/
|
|
|
|
/* A node in a RPL Non-storing graph, stored at the root and representing
|
|
* all child-parent relationship. Used to build source routes */
|
|
typedef struct rpl_ns_node {
|
|
struct rpl_ns_node *next;
|
|
uint32_t lifetime;
|
|
rpl_dag_t *dag;
|
|
/* Store only IPv6 link identifiers as all nodes in the DAG share the same prefix */
|
|
unsigned char link_identifier[8];
|
|
struct rpl_ns_node *parent;
|
|
} rpl_ns_node_t;
|
|
|
|
/********** Public functions **********/
|
|
|
|
/**
|
|
* Tells how many nodes are currently stored in the graph
|
|
*
|
|
* \return The number of nodes
|
|
*/
|
|
int rpl_ns_num_nodes(void);
|
|
|
|
/**
|
|
* Expires a given child-parent link
|
|
*
|
|
* \param child The IPv6 address of the child
|
|
* \param parent The IPv6 address of the parent
|
|
*/
|
|
void rpl_ns_expire_parent(const uip_ipaddr_t *child, const uip_ipaddr_t *parent);
|
|
|
|
/**
|
|
* Updates a child-parent link
|
|
*
|
|
* \param child The IPv6 address of the child
|
|
* \param parent The IPv6 address of the parent
|
|
* \param lifetime The link lifetime in seconds
|
|
*/
|
|
rpl_ns_node_t *rpl_ns_update_node(const uip_ipaddr_t *child, const uip_ipaddr_t *parent, uint32_t lifetime);
|
|
|
|
/**
|
|
* Returns the head of the non-storing node list
|
|
*
|
|
* \return The head of the list
|
|
*/
|
|
rpl_ns_node_t *rpl_ns_node_head(void);
|
|
|
|
/**
|
|
* Returns the next element of the non-storing node list
|
|
*
|
|
* \param item The current element in the list
|
|
* \return The next element of the list
|
|
*/
|
|
rpl_ns_node_t *rpl_ns_node_next(rpl_ns_node_t *item);
|
|
|
|
/**
|
|
* Looks up for a RPL NS node from its IPv6 global address
|
|
*
|
|
* \param addr The target address
|
|
* \return A pointer to the node
|
|
*/
|
|
rpl_ns_node_t *rpl_ns_get_node(const uip_ipaddr_t *addr);
|
|
|
|
/**
|
|
* Telle whether an address is reachable, i.e. if there exists a path from
|
|
* the root to the node in the current RPL NS graph
|
|
*
|
|
* \param addr The target IPv6 global address
|
|
* \return 1 if the node is reachable, 0 otherwise
|
|
*/
|
|
int rpl_ns_is_addr_reachable(const uip_ipaddr_t *addr);
|
|
|
|
/**
|
|
* Finds the global address of a given node
|
|
*
|
|
* \param addr A pointer to the address to be written
|
|
* \param node The target node
|
|
* \return 1 if success, 0 otherwise
|
|
*/
|
|
int rpl_ns_get_node_global_addr(uip_ipaddr_t *addr, rpl_ns_node_t *node);
|
|
|
|
/**
|
|
* A function called periodically. Used to age the links (decrease lifetime
|
|
* and expire links accordingly)
|
|
*
|
|
* \param seconds The number of seconds elapsted since last call
|
|
*/
|
|
void rpl_ns_periodic(unsigned seconds);
|
|
|
|
/**
|
|
* Initialize rpl-ns module
|
|
*/
|
|
void rpl_ns_init(void);
|
|
|
|
/**
|
|
* Deallocate all neighbors
|
|
*/
|
|
void rpl_ns_free_all(void);
|
|
|
|
/** @} */
|
|
|
|
#endif /* RPL_NS_H */
|