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