/*
 * 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
 *	Public configuration and API declarations for ContikiRPL.
 * \author
 *	Joakim Eriksson <joakime@sics.se> & Nicolas Tsiftes <nvt@sics.se>
 *
 */

#ifndef RPL_CONF_H
#define RPL_CONF_H

/* Set to 1 to enable RPL statistics */
#ifndef RPL_CONF_STATS
#define RPL_CONF_STATS 0
#endif /* RPL_CONF_STATS */

/* 
 * Select routing metric supported at runtime. This must be a valid
 * DAG Metric Container Object Type (see below). Currently, we only 
 * support RPL_DAG_MC_ETX and RPL_DAG_MC_ENERGY.
 */
#ifdef RPL_CONF_DAG_MC
#define RPL_DAG_MC RPL_CONF_DAG_MC
#else
#define RPL_DAG_MC RPL_DAG_MC_ETX
#endif /* RPL_CONF_DAG_MC */

/*
 * The objective function used by RPL is configurable through the 
 * RPL_CONF_OF parameter. This should be defined to be the name of an 
 * rpl_of_t object linked into the system image, e.g., rpl_of0.
 */
#ifdef RPL_CONF_OF
#define RPL_OF RPL_CONF_OF
#else
/* ETX is the default objective function. */
#define RPL_OF rpl_of_etx
#endif /* RPL_CONF_OF */

/* This value decides which DAG instance we should participate in by default. */
#ifdef RPL_CONF_DEFAULT_INSTANCE
#define RPL_DEFAULT_INSTANCE RPL_CONF_DEFAULT_INSTANCE
#else
#define RPL_DEFAULT_INSTANCE	       0x1e
#endif /* RPL_CONF_DEFAULT_INSTANCE */

/*
 * This value decides if this node must stay as a leaf or not
 * as allowed by draft-ietf-roll-rpl-19#section-8.5
 */
#ifdef RPL_CONF_LEAF_ONLY
#define RPL_LEAF_ONLY RPL_CONF_LEAF_ONLY
#else
#define RPL_LEAF_ONLY 0
#endif

/*
 * Maximum of concurent RPL instances.
 */
#ifdef RPL_CONF_MAX_INSTANCES
#define RPL_MAX_INSTANCES     RPL_CONF_MAX_INSTANCES
#else
#define RPL_MAX_INSTANCES     1
#endif /* RPL_CONF_MAX_INSTANCES */

/*
 * Maximum number of DAGs within an instance.
 */
#ifdef RPL_CONF_MAX_DAG_PER_INSTANCE
#define RPL_MAX_DAG_PER_INSTANCE     RPL_CONF_MAX_DAG_PER_INSTANCE
#else
#define RPL_MAX_DAG_PER_INSTANCE     2
#endif /* RPL_CONF_MAX_DAG_PER_INSTANCE */

/*
 * 
 */
#ifndef RPL_CONF_DAO_SPECIFY_DAG
  #if RPL_MAX_DAG_PER_INSTANCE > 1
    #define RPL_DAO_SPECIFY_DAG 1
  #else
    #define RPL_DAO_SPECIFY_DAG 0
  #endif /* RPL_MAX_DAG_PER_INSTANCE > 1 */
#else
  #define RPL_DAO_SPECIFY_DAG RPL_CONF_DAO_SPECIFY_DAG
#endif /* RPL_CONF_DAO_SPECIFY_DAG */

/*
 * The DIO interval (n) represents 2^n ms.
 *
 * According to the specification, the default value is 3 which
 * means 8 milliseconds. That is far too low when using duty cycling
 * with wake-up intervals that are typically hundreds of milliseconds.
 * ContikiRPL thus sets the default to 2^12 ms = 4.096 s.
 */
#ifdef RPL_CONF_DIO_INTERVAL_MIN
#define RPL_DIO_INTERVAL_MIN        RPL_CONF_DIO_INTERVAL_MIN
#else
#define RPL_DIO_INTERVAL_MIN        12
#endif

/*
 * Maximum amount of timer doublings.
 *
 * The maximum interval will by default be 2^(12+8) ms = 1048.576 s.
 * RFC 6550 suggests a default value of 20, which of course would be
 * unsuitable when we start with a minimum interval of 2^12.
 */
#ifdef RPL_CONF_DIO_INTERVAL_DOUBLINGS
#define RPL_DIO_INTERVAL_DOUBLINGS  RPL_CONF_DIO_INTERVAL_DOUBLINGS
#else
#define RPL_DIO_INTERVAL_DOUBLINGS  8
#endif

/*
 * DIO redundancy. To learn more about this, see RFC 6206.
 *
 * RFC 6550 suggests a default value of 10. It is unclear what the basis
 * of this suggestion is. Network operators might attain more efficient
 * operation by tuning this parameter for specific deployments.
 */
#ifdef RPL_CONF_DIO_REDUNDANCY
#define RPL_DIO_REDUNDANCY          RPL_CONF_DIO_REDUNDANCY
#else
#define RPL_DIO_REDUNDANCY          10
#endif

#endif /* RPL_CONF_H */
