int aodv_metric_do(metric_t* metric, uint8_t last_hop[ETH_ALEN], dessert_meshif_t* iface) {
switch(metric_type) {
case AODV_METRIC_HOP_COUNT: {
(*metric)++;
break;
}
case AODV_METRIC_RSSI: {
struct avg_node_result sample = dessert_rssi_avg(last_hop, iface);
uint8_t interval = hf_rssi2interval(sample.avg_rssi);
dessert_trace("incomming rssi_metric=%" AODV_PRI_METRIC ", add %" PRIu8 " (rssi=%" PRId8 ") for the last hop " MAC, (*metric), interval, sample.avg_rssi, EXPLODE_ARRAY6(last_hop));
(*metric) += interval;
break;
}
case AODV_METRIC_ETX: {
dessert_crit("AODV_METRIC_ETX -> not implemented! -> using AODV_METRIC_HOP_COUNT as fallback");
(*metric)++; /* HOP_COUNT */
break;
}
case AODV_METRIC_ETT: {
dessert_crit("AODV_METRIC_ETT -> not implemented! -> using AODV_METRIC_HOP_COUNT as fallback");
(*metric)++; /* HOP_COUNT */
break;
}
default: {
dessert_crit("unknown metric=%" PRIu8 " -> using HOP_COUNT as fallback", metric_type);
(*metric)++; /* HOP_COUNT */
return false;
}
}
return true;
}
int aodv_metric_do(metric_t* metric, mac_addr last_hop, dessert_meshif_t* iface, struct timeval* timestamp) {
switch(metric_type) {
case AODV_METRIC_HOP_COUNT: {
(*metric)++;
break;
}
#ifndef ANDROID
case AODV_METRIC_RSSI: {
struct avg_node_result sample = dessert_rssi_avg(last_hop, iface);
metric_t interval = hf_rssi2interval(sample.avg_rssi);
dessert_trace("incoming rssi_metric=%" AODV_PRI_METRIC ", add %" PRIu8 " (rssi=%" PRId8 ") for the last hop " MAC, (*metric), interval, sample.avg_rssi, EXPLODE_ARRAY6(last_hop));
*metric += interval;
break;
}
#endif
case AODV_METRIC_ETX_ADD: {
metric_t link_etx_add = AODV_MAX_METRIC;
if(aodv_db_pdr_get_etx_add(last_hop, &link_etx_add, timestamp)) {
dessert_debug("Old metricval %" AODV_PRI_METRIC " ETX_ADD rcvd =%" PRIu16 " for this hop " MAC, (*metric), link_etx_add, EXPLODE_ARRAY6(last_hop));
}
else {
dessert_debug("Old metricval %" AODV_PRI_METRIC " ETX_ADD for hop " MAC " failed", *metric, EXPLODE_ARRAY6(last_hop));
}
/**prevent overflow*/
if(AODV_MAX_METRIC - link_etx_add > *metric) {
*metric += link_etx_add;
}
else {
*metric = AODV_MAX_METRIC;
}
dessert_debug("New metric value =%" AODV_PRI_METRIC " for hop " MAC, *metric, EXPLODE_ARRAY6(last_hop));
break;
}
case AODV_METRIC_ETX_MUL: {
metric_t link_etx_mul = 0;
if(aodv_db_pdr_get_etx_mul(last_hop, &link_etx_mul, timestamp) == true) {
dessert_debug("Old metricval %" AODV_PRI_METRIC " ETX_MUL rcvd =%" PRIu16 " for this hop " MAC, (*metric), link_etx_mul, EXPLODE_ARRAY6(last_hop));
uintmax_t result = (*metric) * (uintmax_t)link_etx_mul;
result /= (AODV_MAX_METRIC/32);
(*metric) = (metric_t) result;
}
else {
dessert_debug("Old metricval %" AODV_PRI_METRIC " ETX_MUL for hop " MAC " failed", (*metric), EXPLODE_ARRAY6(last_hop));
(*metric) = 0;
}
dessert_debug("New metric value =%" AODV_PRI_METRIC " for hop " MAC, (*metric), EXPLODE_ARRAY6(last_hop));
break;
}
case AODV_METRIC_PDR: {
uint16_t link_pdr = 0;
if(aodv_db_pdr_get_pdr(last_hop, &link_pdr, timestamp) == true){
dessert_debug("Old metricval %" AODV_PRI_METRIC " PDR rcvd =%" PRIu16 " for this hop " MAC, (*metric), link_pdr, EXPLODE_ARRAY6(last_hop));
uint32_t result = (*metric) * (uint32_t)link_pdr;
result = result / AODV_MAX_METRIC;
(*metric) = (metric_t) result;
}
else {
dessert_debug("Old metricval %" AODV_PRI_METRIC " PDR for hop " MAC " failed", (*metric), EXPLODE_ARRAY6(last_hop));
(*metric) = 0;
}
dessert_debug("New metric value =%" AODV_PRI_METRIC " for hop " MAC, (*metric), EXPLODE_ARRAY6(last_hop));
break;
}
case AODV_METRIC_RFC: {
break;
}
default: {
dessert_crit("unknown metric set -> using AODV_METRIC_RFC as fallback");
return false;
}
}
return true;
}
