a752c7ab
 elopes
add first test an...
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/*
* Copyright (C) 2014 Oliver Hahm <oliver.hahm@inria.fr>
*
* 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.
*/
/**
* @ingroup net_gnrc_rpl
* @{
* @file
* @brief Objective Function Zero.
*
* Implementation of Objective Function Zero.
*
* @author Eric Engel <eric.engel@fu-berlin.de>
* @}
*/
#include <string.h>
#include "of0.h"
#include "net/gnrc/rpl.h"
#include "net/gnrc/rpl/structs.h"
static uint16_t calc_rank(gnrc_rpl_parent_t *, uint16_t);
static gnrc_rpl_parent_t *which_parent(gnrc_rpl_parent_t *, gnrc_rpl_parent_t *);
static int parent_cmp(gnrc_rpl_parent_t *, gnrc_rpl_parent_t *);
static gnrc_rpl_dodag_t *which_dodag(gnrc_rpl_dodag_t *, gnrc_rpl_dodag_t *);
static void reset(gnrc_rpl_dodag_t *);
static gnrc_rpl_of_t gnrc_rpl_of0 = {
0x0,
calc_rank,
which_parent,
parent_cmp,
which_dodag,
reset,
NULL,
NULL,
NULL
};
gnrc_rpl_of_t *gnrc_rpl_get_of0(void)
{
return &gnrc_rpl_of0;
}
void reset(gnrc_rpl_dodag_t *dodag)
{
/* Nothing to do in OF0 */
(void) dodag;
}
uint16_t calc_rank(gnrc_rpl_parent_t *parent, uint16_t base_rank)
{
if (base_rank == 0) {
if (parent == NULL) {
return GNRC_RPL_INFINITE_RANK;
}
base_rank = parent->rank;
}
uint16_t add;
if (parent != NULL) {
add = parent->dodag->instance->min_hop_rank_inc;
}
else {
add = GNRC_RPL_DEFAULT_MIN_HOP_RANK_INCREASE;
}
if ((base_rank + add) < base_rank) {
return GNRC_RPL_INFINITE_RANK;
}
return base_rank + add;
}
/* We simply return the Parent with lower rank */
gnrc_rpl_parent_t *which_parent(gnrc_rpl_parent_t *p1, gnrc_rpl_parent_t *p2)
{
if (parent_cmp(p1, p2) > 0) {
return p2;
}
return p1;
}
int parent_cmp(gnrc_rpl_parent_t *parent1, gnrc_rpl_parent_t *parent2)
{
if (parent1->rank < parent2->rank) {
return -1;
}
else if (parent1->rank > parent2->rank) {
return 1;
}
return 0;
}
/* Not used yet */
gnrc_rpl_dodag_t *which_dodag(gnrc_rpl_dodag_t *d1, gnrc_rpl_dodag_t *d2)
{
(void) d2;
return d1;
}
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