Implementation of the Trickle multicast engine
This commit is contained in:
George Oikonomou
George Oikonomou
parent
6f3a1eb032
commit
151533b9bc
1435
core/net/ipv6/multicast/roll-tm.c
Normal file
1435
core/net/ipv6/multicast/roll-tm.c
Normal file
File diff suppressed because it is too large
Load diff
238
core/net/ipv6/multicast/roll-tm.h
Normal file
238
core/net/ipv6/multicast/roll-tm.h
Normal file
|
|
@ -0,0 +1,238 @@
|
|||
/*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
/**
|
||||
* \file
|
||||
* Header file for 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.
|
||||
*
|
||||
* \author
|
||||
* George Oikonomou - <oikonomou@users.sourceforge.net>
|
||||
*/
|
||||
|
||||
#ifndef ROLL_TM_H_
|
||||
#define ROLL_TM_H_
|
||||
|
||||
#include "contiki-conf.h"
|
||||
|
||||
#include <stdint.h>
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/* Protocol Constants */
|
||||
/*---------------------------------------------------------------------------*/
|
||||
#define ROLL_TM_VER 1 /* Supported Draft Version */
|
||||
#define ROLL_TM_ICMP_CODE 0 /* 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,
|
||||
* sensinode/cc243x), 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
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/* Prototypes of additional Trickle Multicast functions */
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/**
|
||||
* \brief Called by the uIPv6 engine when it receives a Trickle Multicast
|
||||
* ICMPv6 datagram
|
||||
*/
|
||||
void roll_tm_icmp_input();
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/* Stats datatype */
|
||||
/*---------------------------------------------------------------------------*/
|
||||
struct roll_tm_stats {
|
||||
uint16_t mcast_in_unique;
|
||||
uint16_t mcast_in_all; /* At layer 3 */
|
||||
uint16_t mcast_in_ours; /* Unique and we are a group member */
|
||||
uint16_t mcast_fwd; /* Forwarded by us but we are not the seed */
|
||||
uint16_t mcast_out; /* We are the seed */
|
||||
uint16_t mcast_bad;
|
||||
uint16_t mcast_dropped;
|
||||
uint16_t icmp_in;
|
||||
uint16_t icmp_out;
|
||||
uint16_t icmp_bad;
|
||||
};
|
||||
|
||||
#endif /* ROLL_TM_H_ */
|
||||
Loading…
Reference in a new issue