Thread tx failure handling update (ARMmbed#1620)

When TX failure threshold is reached Thread cleaup is called, device
information still remains in MLE layer causing routing problems later.

Update Thread TX failure handler to clean entry information from
MLE layer. MLE cleanup will trigger cleaning from MAC and Thread
layers.

source/6LoWPAN/Thread/thread_common.c

@@ -1838,7 +1838,7 @@ static void thread_tx_failure_handler(int8_t nwk_id, uint8_t accumulated_failure
     }
 
     if (accumulated_failures >= THREAD_MAC_TRANSMISSIONS*THREAD_FAILED_CHILD_TRANSMISSIONS) {
-        thread_reset_neighbour_info(cur, neighbor);
+        mle_class_remove_entry(cur->id, neighbor);
     }
 }
 

source/6LoWPAN/Thread/thread_routing.c

@@ -768,6 +768,8 @@ static void delete_link(thread_info_t *thread, thread_router_link_t *link)
     thread_router_id_t id = link->router_id;
     thread_routing_info_t *routing = &thread->routing;
 
+    tr_debug("delete_link: router: %x", thread_router_addr_from_id(link->router_id));
+
     /* Remove entry from the link set */
     ns_list_remove(&routing->link_set, link);
     ns_dyn_mem_free(link);
@@ -779,7 +781,6 @@ static void delete_link(thread_info_t *thread, thread_router_link_t *link)
             ns_dyn_mem_free(route_entry);
         }
     }
-
     thread_update_fast_route_table(thread);
 }
 

source/6LoWPAN/adaptation_interface.c

@@ -1014,6 +1014,12 @@ int8_t lowpan_adaptation_interface_tx_confirm(protocol_interface_info_entry_t *c
         case MLME_TRANSACTION_EXPIRED:
         default:
             tr_error("MCPS Data fail by status %u", confirm->status);
+            if (buf->dst_sa.addr_type == ADDR_802_15_4_SHORT) {
+                tr_info("Dest addr: %x", common_read_16_bit(buf->dst_sa.address+2));
+            } else if (buf->dst_sa.addr_type == ADDR_802_15_4_LONG) {
+                tr_info("Dest addr: %s", trace_array(buf->dst_sa.address+2, 8));
+            }
+
 #ifdef HAVE_RPL
             if (confirm->status == MLME_TX_NO_ACK) {
                 if (buf->route && rpl_data_is_rpl_parent_route(buf->route->route_info.source)) {