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Restrict the rank to INFINITE_RANK

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This commit is contained in:
nvt-se 2010-06-03 12:12:20 +00:00
parent c4278dedc2
commit 352fb4e74d
1 changed files with 15 additions and 15 deletions
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30
core/net/rpl/rpl-of-etx.c
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@ -32,7 +32,7 @@
* *
* This file is part of the Contiki operating system. * This file is part of the Contiki operating system.
* *
* $Id: rpl-of-etx.c,v 1.3 2010/06/02 16:23:11 joxe Exp $ * $Id: rpl-of-etx.c,v 1.4 2010/06/03 12:12:20 nvt-se Exp $
*/ */
/** /**
* \file * \file
@ -64,16 +64,15 @@ rpl_of_t rpl_of_etx = {
#define PATH_ETX_MIN 1 #define PATH_ETX_MIN 1
#define PATH_ETX_MAX 200 #define PATH_ETX_MAX 200
#define PARENT_SWITCH_ETX_THRESHOLD 0.5 #define PARENT_SWITCH_ETX_THRESHOLD 0.5
#define INFINITY 0xffff
typedef unsigned int etx_t; typedef uint16_t etx_t;
static etx_t min_path_etx = INFINITY; static etx_t min_path_etx = INFINITE_RANK;
static void static void
reset(void *dag) reset(void *dag)
{ {
min_path_etx = INFINITY; min_path_etx = INFINITE_RANK;
} }
static void static void
@ -84,15 +83,15 @@ parent_state_callback(rpl_parent_t *parent, int known, int etx)
dag = (rpl_dag_t *)parent->dag; dag = (rpl_dag_t *)parent->dag;
if(known) { if(known) {
if(min_path_etx != INFINITY) { if(min_path_etx != INFINITE_RANK) {
dag->rank = min_path_etx + etx; dag->rank = min_path_etx + etx;
PRINTF("RPL: New path ETX: %u min_path_etx=%u etx=%u\n", PRINTF("RPL: New path ETX: %u min_path_etx=%u etx=%u\n",
(unsigned)(min_path_etx + etx), min_path_etx, etx); (unsigned)(min_path_etx + etx), min_path_etx, etx);
} }
} else { } else {
if(RPL_PARENT_COUNT(dag) == 1) { if(RPL_PARENT_COUNT(dag) == 1) {
/* Our last parent has disappeared, set the path ETX to infinity. */ /* Our last parent has disappeared, set the path ETX to INFINITE_RANK. */
min_path_etx = INFINITY; min_path_etx = INFINITE_RANK;
} }
} }
} }
@ -109,13 +108,14 @@ increment_rank(rpl_rank_t rank, rpl_parent_t *parent)
PRINTF("RPL: min_path_etx updated to:%u\n", min_path_etx); PRINTF("RPL: min_path_etx updated to:%u\n", min_path_etx);
} }
/* calculate the rank based on the new rank information from DIO or if(INFINITE_RANK - rank < LINK_ETX_MAX) {
stored otherwise */ /* Reached the maximum rank. */
new_rank = rank + LINK_ETX_MAX; new_rank = INFINITE_RANK;
} else {
/* if(new_rank < rank) { */ /* Calculate the rank based on the new rank information from DIO or
/* return INFINITE_RANK; */ stored otherwise. */
/* } */ new_rank = rank + LINK_ETX_MAX;
}
PRINTF("RPL: Path ETX %u\n", (unsigned)new_rank); PRINTF("RPL: Path ETX %u\n", (unsigned)new_rank);