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/*
* Trickle implementation
*
* Copyright (C) 2013, 2014 INRIA.
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @author Eric Engel <eric.engel@fu-berlin.de>
* @author Cenk Gündoğan <cnkgndgn@gmail.com>
*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "inttypes.h"
#include "random.h"
#include "trickle.h"
#define ENABLE_DEBUG (0)
#include "debug.h"
void trickle_callback(trickle_t *trickle)
{
/* Handle k=0 like k=infinity (according to RFC6206, section 6.5) */
if ((trickle->c < trickle->k) || (trickle->k == 0)) {
(*trickle->callback.func)(trickle->callback.args);
}
}
void trickle_interval(trickle_t *trickle)
{
uint32_t max_interval;
trickle->I = trickle->I * 2;
max_interval = trickle->Imin << trickle->Imax;
if ((trickle->I == 0) || (trickle->I > max_interval)) {
trickle->I = max_interval;
}
DEBUG("trickle: I == %" PRIu32 "\n", trickle->I);
trickle->c = 0;
trickle->t = (trickle->I / 2) + random_uint32_range(0, (trickle->I / 2) + 1);
trickle->msg_callback_time = trickle->t * MS_PER_SEC;
xtimer_set_msg64(&trickle->msg_callback_timer, trickle->msg_callback_time,
&trickle->msg_callback, trickle->pid);
trickle->msg_interval_time = trickle->I * MS_PER_SEC;
xtimer_set_msg64(&trickle->msg_interval_timer, trickle->msg_interval_time,
&trickle->msg_interval, trickle->pid);
}
void trickle_reset_timer(trickle_t *trickle)
{
trickle_stop(trickle);
trickle_start(trickle->pid, trickle, trickle->msg_interval.type, trickle->msg_callback.type,
trickle->Imin, trickle->Imax, trickle->k);
}
void trickle_start(kernel_pid_t pid, trickle_t *trickle, uint16_t interval_msg_type,
uint16_t callback_msg_type, uint32_t Imin, uint8_t Imax, uint8_t k)
{
trickle->pid = pid;
trickle->c = 0;
trickle->k = k;
trickle->Imin = Imin;
trickle->Imax = Imax;
trickle->I = trickle->Imin + random_uint32_range(0, 4 * trickle->Imin);
trickle->pid = pid;
trickle->msg_interval.content.ptr = trickle;
trickle->msg_interval.type = interval_msg_type;
trickle->msg_callback.content.ptr = trickle;
trickle->msg_callback.type = callback_msg_type;
trickle_interval(trickle);
}
void trickle_stop(trickle_t *trickle)
{
xtimer_remove(&trickle->msg_interval_timer);
xtimer_remove(&trickle->msg_callback_timer);
}
void trickle_increment_counter(trickle_t *trickle)
{
trickle->c++;
}