Dynamic min lifetime for temporary neighbour.

Change-Id: I85308f464ce3513406b637063c9f41ad5d461855

Author: Juha Heiskanen

source/6LoWPAN/ws/ws_bootstrap.c

@@ -1497,8 +1497,13 @@ static void ws_bootstrap_neighbor_table_clean(struct protocol_interface_info_ent
 
         //Read current timestamp
         uint32_t time_from_last_unicast_shedule = ws_time_from_last_unicast_traffic(current_time_stamp, ws_neighbor);
-
-        if (time_from_last_unicast_shedule > WS_NEIGHBOR_TEMPORARY_LINK_MIN_TIMEOUT) {
+        uint32_t min_timeout;
+        if (interface->ws_info->network_size_config == NETWORK_SIZE_LARGE) {
+            min_timeout = WS_NEIGHBOR_TEMPORARY_LINK_MIN_TIMEOUT_LARGE;
+        } else {
+            min_timeout = WS_NEIGHBOR_TEMPORARY_LINK_MIN_TIMEOUT_SMALL;
+        }
+        if (time_from_last_unicast_shedule > min_timeout) {
             //Accept only Enough Old Device
             if (!neighbor_entry_ptr) {
                 //Accept first compare

source/6LoWPAN/ws/ws_common.c

@@ -438,7 +438,7 @@ bool ws_common_negative_aro_mark(protocol_interface_info_entry_t *interface, con
     }
     ws_neighbor_class_entry_t *ws_neighbor = ws_neighbor_class_entry_get(&interface->ws_info->neighbor_storage, neighbour->index);
     ws_neighbor->negative_aro_send = true;
-    neighbour->lifetime = WS_NEIGHBOR_TEMPORARY_LINK_MIN_TIMEOUT; //Remove anyway if Packet is freed before MAC push
+    neighbour->lifetime = WS_NEIGHBOR_TEMPORARY_LINK_MIN_TIMEOUT_SMALL; //Remove anyway if Packet is freed before MAC push
     return true;
 }
 

source/6LoWPAN/ws/ws_common_defines.h

@@ -186,7 +186,8 @@ typedef struct ws_bs_ie {
 #define WS_FAN_VERSION_1_0 1
 
 #define WS_NEIGHBOR_LINK_TIMEOUT 2200
-#define WS_NEIGHBOR_TEMPORARY_LINK_MIN_TIMEOUT 120
+#define WS_NEIGHBOR_TEMPORARY_LINK_MIN_TIMEOUT_LARGE 520
+#define WS_NEIGHBOR_TEMPORARY_LINK_MIN_TIMEOUT_SMALL 260
 #define WS_NEIGHBOR_NUD_TIMEOUT WS_NEIGHBOR_LINK_TIMEOUT / 2
 
 #define WS_NEIGBOR_ETX_SAMPLE_MAX 3