Cleaned up the collect neighbor management code
This commit is contained in:
adamdunkels
parent
b23a364397
commit
d0579c8a81
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@ -33,7 +33,7 @@
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*
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* This file is part of the Contiki operating system.
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*
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* $Id: collect-neighbor.c,v 1.6 2010/09/22 22:04:55 adamdunkels Exp $
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* $Id: collect-neighbor.c,v 1.7 2010/10/03 20:07:10 adamdunkels Exp $
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*/
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/**
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@ -63,7 +63,8 @@
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MEMB(collect_neighbors_mem, struct collect_neighbor, MAX_COLLECT_NEIGHBORS);
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static int max_time = 2400;
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#define MAX_AGE 60
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#define PERIODIC_INTERVAL CLOCK_SECOND * 60
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#define DEBUG 0
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#if DEBUG
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@ -78,32 +79,22 @@ static void
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periodic(void *ptr)
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{
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struct collect_neighbor_list *neighbor_list;
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struct collect_neighbor *n, *next;
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struct collect_neighbor *n;
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neighbor_list = ptr;
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/* Go through all collect_neighbors and remove old ones. */
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for(n = list_head(neighbor_list->list); n != NULL; n = next) {
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next = NULL;
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if(!rimeaddr_cmp(&n->addr, &rimeaddr_null) &&
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n->time < max_time) {
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n->time++;
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if(n->time == max_time) {
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n->rtmetric = RTMETRIC_MAX;
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PRINTF("%d.%d: removing old collect_neighbor %d.%d\n",
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rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1],
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n->addr.u8[0], n->addr.u8[1]);
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rimeaddr_copy(&n->addr, &rimeaddr_null);
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next = list_item_next(n);
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list_remove(neighbor_list->list, n);
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memb_free(&collect_neighbors_mem, n);
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}
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}
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if(next == NULL) {
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next = list_item_next(n);
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/* Go through all collect_neighbors and increase their age. */
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for(n = list_head(neighbor_list->list); n != NULL; n = list_item_next(n)) {
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n->age++;
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}
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for(n = list_head(neighbor_list->list); n != NULL; n = list_item_next(n)) {
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if(n->age == MAX_AGE) {
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list_remove(neighbor_list->list, n);
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n = list_head(neighbor_list->list);
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}
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}
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ctimer_set(&neighbor_list->periodic, CLOCK_SECOND, periodic, neighbor_list);
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ctimer_set(&neighbor_list->periodic, PERIODIC_INTERVAL,
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periodic, neighbor_list);
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}
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/*---------------------------------------------------------------------------*/
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void
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@ -137,20 +128,17 @@ collect_neighbor_list_find(struct collect_neighbor_list *neighbors_list,
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return NULL;
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}
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/*---------------------------------------------------------------------------*/
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void
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int
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collect_neighbor_list_add(struct collect_neighbor_list *neighbors_list,
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const rimeaddr_t *addr, uint8_t nrtmetric)
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const rimeaddr_t *addr, uint16_t nrtmetric)
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{
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uint16_t rtmetric;
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uint16_t le;
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struct collect_neighbor *n, *max;
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struct collect_neighbor *n;
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PRINTF("collect_neighbor_add: adding %d.%d\n", addr->u8[0], addr->u8[1]);
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/* Check if the collect_neighbor is already on the list. */
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for(n = list_head(neighbors_list->list); n != NULL; n = list_item_next(n)) {
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if(rimeaddr_cmp(&n->addr, &rimeaddr_null) ||
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rimeaddr_cmp(&n->addr, addr)) {
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if(rimeaddr_cmp(&n->addr, addr)) {
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PRINTF("collect_neighbor_add: already on list %d.%d\n",
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addr->u8[0], addr->u8[1]);
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break;
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@ -169,64 +157,63 @@ collect_neighbor_list_add(struct collect_neighbor_list *neighbors_list,
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}
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/* If we could not allocate memory, we try to recycle an old
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collect_neighbor */
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neighbor. XXX Should also look for the one with the worst
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rtmetric (not link esimate). XXX Also make sure that we don't
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replace a neighbor with a neighbor that has a worse metric. */
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if(n == NULL) {
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PRINTF("collect_neighbor_add: not on list, not allocated, recycling %d.%d\n",
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addr->u8[0], addr->u8[1]);
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/* Find the first unused entry or the used entry with the highest
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rtmetric and highest link estimate. */
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rtmetric = 0;
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le = 0;
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max = NULL;
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uint16_t worst_rtmetric;
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struct collect_neighbor *worst_neighbor;
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for(n = list_head(neighbors_list->list); n != NULL; n = list_item_next(n)) {
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if(!rimeaddr_cmp(&n->addr, &rimeaddr_null)) {
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if(n->rtmetric > rtmetric) {
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rtmetric = n->rtmetric;
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le = collect_neighbor_link_estimate(n);
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max = n;
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} else if(n->rtmetric == rtmetric) {
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if(collect_neighbor_link_estimate(n) > le) {
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rtmetric = n->rtmetric;
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le = collect_neighbor_link_estimate(n);
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max = n;
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/* PRINTF("%d: found worst collect_neighbor %d with rtmetric %d, signal %d\n",
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node_id, collect_neighbors[n].nodeid, rtmetric, signal);*/
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}
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}
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/* Find the neighbor that has the highest rtmetric. This is the
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neighbor that we are least likely to be using in the
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future. But we also need to make sure that the neighbor we are
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currently adding is not worst than the one we would be
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replacing. If so, we don't put the new neighbor on the list. */
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worst_rtmetric = 0;
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worst_neighbor = NULL;
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for(n = list_head(neighbors_list->list);
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n != NULL; n = list_item_next(n)) {
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if(n->rtmetric > worst_rtmetric) {
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worst_neighbor = n;
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worst_rtmetric = n->rtmetric;
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}
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}
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n = max;
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/* Only add this new neighbor if its rtmetric is lower than the
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one it would replace. */
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if(nrtmetric < worst_rtmetric) {
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n = worst_neighbor;
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}
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PRINTF("collect_neighbor_add: not on list, not allocated, recycling %d.%d\n",
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n->addr.u8[0], n->addr.u8[1]);
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}
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/* PRINTF("%d: adding collect_neighbor %d with rtmetric %d, signal %d at %d\n",
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node_id, collect_neighbors[n].nodeid, rtmetric, signal, n);*/
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if(n != NULL) {
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n->time = 0;
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n->age = 0;
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rimeaddr_copy(&n->addr, addr);
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n->rtmetric = nrtmetric;
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collect_link_estimate_new(&n->le);
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return 1;
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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list_t
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collect_neighbor_list(struct collect_neighbor_list *neighbors_list)
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{
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return neighbors_list->list;
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}
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/*---------------------------------------------------------------------------*/
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void
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collect_neighbor_list_remove(struct collect_neighbor_list *neighbors_list,
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const rimeaddr_t *addr)
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{
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struct collect_neighbor *n;
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struct collect_neighbor *n = collect_neighbor_list_find(neighbors_list, addr);
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for(n = list_head(neighbors_list->list); n != NULL; n = list_item_next(n)) {
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if(rimeaddr_cmp(&n->addr, addr)) {
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PRINTF("%d.%d: removing %d.%d\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
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addr->u8[0], addr->u8[1]);
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rimeaddr_copy(&n->addr, &rimeaddr_null);
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n->rtmetric = RTMETRIC_MAX;
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list_remove(neighbors_list->list, n);
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memb_free(&collect_neighbors_mem, n);
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return;
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}
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if(n != NULL) {
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list_remove(neighbors_list->list, n);
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memb_free(&collect_neighbors_mem, n);
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}
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}
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/*---------------------------------------------------------------------------*/
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@ -243,15 +230,14 @@ collect_neighbor_list_best(struct collect_neighbor_list *neighbors_list)
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/* PRINTF("%d: ", node_id);*/
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PRINTF("collect_neighbor_best: ");
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/* Find the lowest rtmetric. */
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/* Find the neighbor with the lowest rtmetric + linkt estimate. */
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for(n = list_head(neighbors_list->list); n != NULL; n = list_item_next(n)) {
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PRINTF("%d.%d %d+%d=%d, ",
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n->addr.u8[0], n->addr.u8[1],
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n->rtmetric, collect_neighbor_link_estimate(n),
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collect_neighbor_rtmetric(n));
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if(!rimeaddr_cmp(&n->addr, &rimeaddr_null) &&
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rtmetric > collect_neighbor_rtmetric_link_estimate(n)) {
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if(collect_neighbor_rtmetric_link_estimate(n) < rtmetric) {
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rtmetric = collect_neighbor_rtmetric_link_estimate(n);
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best = n;
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}
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@ -297,59 +283,57 @@ collect_neighbor_list_purge(struct collect_neighbor_list *neighbors_list)
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}
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/*---------------------------------------------------------------------------*/
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void
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collect_neighbor_update_rtmetric(struct collect_neighbor *n, uint8_t rtmetric)
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collect_neighbor_update_rtmetric(struct collect_neighbor *n, uint16_t rtmetric)
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{
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if(n != NULL) {
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PRINTF("%d.%d: collect_neighbor_update %d.%d rtmetric %d\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
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n->addr.u8[0], n->addr.u8[1], rtmetric);
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n->rtmetric = rtmetric;
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n->time = 0;
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n->age = 0;
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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collect_neighbor_tx_fail(struct collect_neighbor *n, uint8_t num_tx)
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collect_neighbor_tx_fail(struct collect_neighbor *n, uint16_t num_tx)
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{
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collect_link_estimate_update_tx_fail(&n->le, num_tx);
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n->age = 0;
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}
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/*---------------------------------------------------------------------------*/
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void
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collect_neighbor_tx(struct collect_neighbor *n, uint8_t num_tx)
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collect_neighbor_tx(struct collect_neighbor *n, uint16_t num_tx)
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{
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collect_link_estimate_update_tx(&n->le, num_tx);
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n->time = 0;
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n->age = 0;
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}
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/*---------------------------------------------------------------------------*/
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void
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collect_neighbor_rx(struct collect_neighbor *n)
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{
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collect_link_estimate_update_rx(&n->le);
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n->time = 0;
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n->age = 0;
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}
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/*---------------------------------------------------------------------------*/
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int
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uint16_t
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collect_neighbor_link_estimate(struct collect_neighbor *n)
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{
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n->age = 0;
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return collect_link_estimate(&n->le);
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}
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/*---------------------------------------------------------------------------*/
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int
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uint16_t
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collect_neighbor_rtmetric_link_estimate(struct collect_neighbor *n)
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{
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n->age = 0;
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return n->rtmetric + collect_link_estimate(&n->le);
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}
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/*---------------------------------------------------------------------------*/
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int
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uint16_t
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collect_neighbor_rtmetric(struct collect_neighbor *n)
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{
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n->age = 0;
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return n->rtmetric;
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}
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/*---------------------------------------------------------------------------*/
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void
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collect_neighbor_set_lifetime(int seconds)
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{
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max_time = seconds;
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}
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/*---------------------------------------------------------------------------*/
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/** @} */
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@ -39,7 +39,7 @@
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*
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* This file is part of the Contiki operating system.
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*
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* $Id: collect-neighbor.h,v 1.4 2010/09/22 22:04:55 adamdunkels Exp $
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* $Id: collect-neighbor.h,v 1.5 2010/10/03 20:07:10 adamdunkels Exp $
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*/
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/**
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@ -63,19 +63,20 @@ struct collect_neighbor_list {
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struct collect_neighbor {
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struct collect_neighbor *next;
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uint16_t time;
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rimeaddr_t addr;
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uint16_t rtmetric;
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uint16_t age;
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struct collect_link_estimate le;
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};
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void collect_neighbor_init(void);
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list_t collect_neighbor_list(struct collect_neighbor_list *neighbor_list);
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void collect_neighbor_list_new(struct collect_neighbor_list *neighbor_list);
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void collect_neighbor_list_add(struct collect_neighbor_list *neighbor_list,
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const rimeaddr_t *addr, uint8_t rtmetric);
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int collect_neighbor_list_add(struct collect_neighbor_list *neighbor_list,
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const rimeaddr_t *addr, uint16_t rtmetric);
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void collect_neighbor_list_remove(struct collect_neighbor_list *neighbor_list,
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const rimeaddr_t *addr);
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struct collect_neighbor *collect_neighbor_list_find(struct collect_neighbor_list *neighbor_list,
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@ -85,14 +86,14 @@ int collect_neighbor_list_num(struct collect_neighbor_list *neighbor_list);
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struct collect_neighbor *collect_neighbor_list_get(struct collect_neighbor_list *neighbor_list, int num);
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void collect_neighbor_list_purge(struct collect_neighbor_list *neighbor_list);
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void collect_neighbor_update_rtmetric(struct collect_neighbor *n, uint8_t rtmetric);
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void collect_neighbor_set_lifetime(int seconds);
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void collect_neighbor_tx(struct collect_neighbor *n, uint8_t num_tx);
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void collect_neighbor_update_rtmetric(struct collect_neighbor *n,
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uint16_t rtmetric);
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void collect_neighbor_tx(struct collect_neighbor *n, uint16_t num_tx);
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void collect_neighbor_rx(struct collect_neighbor *n);
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void collect_neighbor_tx_fail(struct collect_neighbor *n, uint8_t num_tx);
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int collect_neighbor_link_estimate(struct collect_neighbor *n);
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int collect_neighbor_rtmetric_link_estimate(struct collect_neighbor *n);
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int collect_neighbor_rtmetric(struct collect_neighbor *n);
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void collect_neighbor_tx_fail(struct collect_neighbor *n, uint16_t num_tx);
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uint16_t collect_neighbor_link_estimate(struct collect_neighbor *n);
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uint16_t collect_neighbor_rtmetric_link_estimate(struct collect_neighbor *n);
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uint16_t collect_neighbor_rtmetric(struct collect_neighbor *n);
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#endif /* __COLLECT_NEIGHBOR_H__ */
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