245 lines
8.3 KiB
C
245 lines
8.3 KiB
C
/*
|
|
* Copyright (c) 2011, Loughborough University - 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.
|
|
*/
|
|
|
|
/**
|
|
* \addtogroup uip6-multicast
|
|
* @{
|
|
*/
|
|
/**
|
|
* \defgroup roll-tm ROLL Trickle Multicast
|
|
*
|
|
* IPv6 multicast according to the algorithm in the
|
|
* "MCAST Forwarding Using Trickle" internet draft.
|
|
*
|
|
* The current version of the draft can always be found in
|
|
* http://tools.ietf.org/html/draft-ietf-roll-trickle-mcast
|
|
*
|
|
* This implementation is based on the draft version stored in
|
|
* ROLL_TM_VER.
|
|
*
|
|
* In draft v2, the document was renamed to
|
|
* "Multicast Protocol for Low power and Lossy Networks (MPL)"
|
|
* Due to very significant changes between draft versions 1 and 2,
|
|
* MPL will be implemented as a separate engine and this file here
|
|
* will provide legacy support for Draft v1.
|
|
* @{
|
|
*/
|
|
/**
|
|
* \file
|
|
* Header file for the implementation of the ROLL-TM multicast engine
|
|
* \author
|
|
* George Oikonomou - <oikonomou@users.sourceforge.net>
|
|
*/
|
|
|
|
#ifndef ROLL_TM_H_
|
|
#define ROLL_TM_H_
|
|
|
|
#include "contiki.h"
|
|
#include "net/ipv6/multicast/uip-mcast6-stats.h"
|
|
|
|
#include <stdint.h>
|
|
/*---------------------------------------------------------------------------*/
|
|
/* Protocol Constants */
|
|
/*---------------------------------------------------------------------------*/
|
|
#define ROLL_TM_VER 1 /**< Supported Draft Version */
|
|
#define ROLL_TM_ICMP_CODE 0 /**< ROLL TM ICMPv6 code field */
|
|
#define ROLL_TM_IP_HOP_LIMIT 0xFF /**< Hop limit for ICMP messages */
|
|
#define ROLL_TM_INFINITE_REDUNDANCY 0xFF
|
|
#define ROLL_TM_DGRAM_OUT 0
|
|
#define ROLL_TM_DGRAM_IN 1
|
|
|
|
/*
|
|
* The draft does not currently specify a default number for the trickle
|
|
* interval nor a way to derive it. Examples however hint at 100 msec.
|
|
*
|
|
* In draft terminology, we use an 'aggressive' policy (M=0) and a conservative
|
|
* one (M=1).
|
|
*
|
|
* When experimenting with the two policies on the sky platform,
|
|
* an interval of 125ms proves to be way too low: When we have traffic,
|
|
* doublings happen after the interval end and periodics fire after point T
|
|
* within the interval (and sometimes even after interval end). When traffic
|
|
* settles down, the code compensates the offsets.
|
|
*
|
|
* We consider 125, 250ms etc because they are nice divisors of 1 sec
|
|
* (quotient is power of two). For some machines (e.g sky/msp430),
|
|
* this is also a nice number of clock ticks
|
|
*
|
|
* After experimentation, the values of Imin leading to best performance are:
|
|
* ContikiMAC: Imin=64 (500ms)
|
|
* Null RDC: imin=16 (125ms)
|
|
*/
|
|
|
|
/* Configuration for Timer with M=0 (aggressive) */
|
|
#ifdef ROLL_TM_CONF_IMIN_0
|
|
#define ROLL_TM_IMIN_0 ROLL_TM_CONF_IMIN_0
|
|
#else
|
|
#define ROLL_TM_IMIN_0 32 /* 250 msec */
|
|
#endif
|
|
|
|
#ifdef ROLL_TM_CONF_IMAX_0
|
|
#define ROLL_TM_IMAX_0 ROLL_TM_CONF_IMAX_0
|
|
#else
|
|
#define ROLL_TM_IMAX_0 1 /* Imax = 500ms */
|
|
#endif
|
|
|
|
#ifdef ROLL_TM_CONF_K_0
|
|
#define ROLL_TM_K_0 ROLL_TM_CONF_K_0
|
|
#else
|
|
#define ROLL_TM_K_0 ROLL_TM_INFINITE_REDUNDANCY
|
|
#endif
|
|
|
|
#ifdef ROLL_TM_CONF_T_ACTIVE_0
|
|
#define ROLL_TM_T_ACTIVE_0 ROLL_TM_CONF_T_ACTIVE_0
|
|
#else
|
|
#define ROLL_TM_T_ACTIVE_0 3
|
|
#endif
|
|
|
|
#ifdef ROLL_TM_CONF_T_DWELL_0
|
|
#define ROLL_TM_T_DWELL_0 ROLL_TM_CONF_T_DWELL_0
|
|
#else
|
|
#define ROLL_TM_T_DWELL_0 11
|
|
#endif
|
|
|
|
/* Configuration for Timer with M=1 (conservative) */
|
|
#ifdef ROLL_TM_CONF_IMIN_1
|
|
#define ROLL_TM_IMIN_1 ROLL_TM_CONF_IMIN_1
|
|
#else
|
|
#define ROLL_TM_IMIN_1 64 /* 500 msec */
|
|
#endif
|
|
|
|
#ifdef ROLL_TM_CONF_IMAX_1
|
|
#define ROLL_TM_IMAX_1 ROLL_TM_CONF_IMAX_1
|
|
#else
|
|
#define ROLL_TM_IMAX_1 9 /* Imax = 256 secs */
|
|
#endif
|
|
|
|
#ifdef ROLL_TM_CONF_K_1
|
|
#define ROLL_TM_K_1 ROLL_TM_CONF_K_1
|
|
#else
|
|
#define ROLL_TM_K_1 1
|
|
#endif
|
|
|
|
#ifdef ROLL_TM_CONF_T_ACTIVE_1
|
|
#define ROLL_TM_T_ACTIVE_1 ROLL_TM_CONF_T_ACTIVE_1
|
|
#else
|
|
#define ROLL_TM_T_ACTIVE_1 3
|
|
#endif
|
|
|
|
#ifdef ROLL_TM_CONF_T_DWELL_1
|
|
#define ROLL_TM_T_DWELL_1 ROLL_TM_CONF_T_DWELL_1
|
|
#else
|
|
#define ROLL_TM_T_DWELL_1 12
|
|
#endif
|
|
/*---------------------------------------------------------------------------*/
|
|
/* Configuration */
|
|
/*---------------------------------------------------------------------------*/
|
|
/**
|
|
* Number of Sliding Windows
|
|
* In essence: How many unique sources of simultaneous multicast traffic do we
|
|
* want to support for our lowpan
|
|
* If a node is seeding two multicast streams, parametrized on different M
|
|
* values, then this seed will occupy two different sliding windows
|
|
*/
|
|
#ifdef ROLL_TM_CONF_WINS
|
|
#define ROLL_TM_WINS ROLL_TM_CONF_WINS
|
|
#else
|
|
#define ROLL_TM_WINS 2
|
|
#endif
|
|
/*---------------------------------------------------------------------------*/
|
|
/**
|
|
* Maximum Number of Buffered Multicast Messages
|
|
* This buffer is shared across all Seed IDs, therefore a new very active Seed
|
|
* may eventually occupy all slots. It would make little sense (if any) to
|
|
* define support for fewer buffered messages than seeds*2
|
|
*/
|
|
#ifdef ROLL_TM_CONF_BUFF_NUM
|
|
#define ROLL_TM_BUFF_NUM ROLL_TM_CONF_BUFF_NUM
|
|
#else
|
|
#define ROLL_TM_BUFF_NUM 6
|
|
#endif
|
|
/*---------------------------------------------------------------------------*/
|
|
/**
|
|
* Use Short Seed IDs [short: 2, long: 16 (default)]
|
|
* It can be argued that we should (and it would be easy to) support both at
|
|
* the same time but the draft doesn't list this as a MUST so we opt for
|
|
* code/ram savings
|
|
*/
|
|
#ifdef ROLL_TM_CONF_SHORT_SEEDS
|
|
#define ROLL_TM_SHORT_SEEDS ROLL_TM_CONF_SHORT_SEEDS
|
|
#else
|
|
#define ROLL_TM_SHORT_SEEDS 0
|
|
#endif
|
|
/*---------------------------------------------------------------------------*/
|
|
/**
|
|
* Destination address for our ICMPv6 advertisements. The draft gives us a
|
|
* choice between LL all-nodes or LL all-routers
|
|
*
|
|
* We use allrouters unless a conf directive chooses otherwise
|
|
*/
|
|
#ifdef ROLL_TM_CONF_DEST_ALL_NODES
|
|
#define ROLL_TM_DEST_ALL_NODES ROLL_TM_CONF_DEST_ALL_NODES
|
|
#else
|
|
#define ROLL_TM_DEST_ALL_NODES 0
|
|
#endif
|
|
/*---------------------------------------------------------------------------*/
|
|
/**
|
|
* M param for our outgoing messages
|
|
* By default, we set the M bit (conservative). Define this as 0 to clear the
|
|
* M bit in our outgoing messages (aggressive)
|
|
*/
|
|
#ifdef ROLL_TM_CONF_SET_M_BIT
|
|
#define ROLL_TM_SET_M_BIT ROLL_TM_CONF_SET_M_BIT
|
|
#else
|
|
#define ROLL_TM_SET_M_BIT 1
|
|
#endif
|
|
/*---------------------------------------------------------------------------*/
|
|
/* Stats datatype */
|
|
/*---------------------------------------------------------------------------*/
|
|
/**
|
|
* \brief Multicast stats extension for the ROLL TM engine
|
|
*/
|
|
struct roll_tm_stats {
|
|
/** Number of received ICMP datagrams */
|
|
UIP_MCAST6_STATS_DATATYPE icmp_in;
|
|
|
|
/** Number of ICMP datagrams sent */
|
|
UIP_MCAST6_STATS_DATATYPE icmp_out;
|
|
|
|
/** Number of malformed ICMP datagrams seen by us */
|
|
UIP_MCAST6_STATS_DATATYPE icmp_bad;
|
|
};
|
|
/*---------------------------------------------------------------------------*/
|
|
#endif /* ROLL_TM_H_ */
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @} */
|
|
/** @} */
|