Added print for debugging why SRH validate check fail.

Change-Id: I57c8edfb35a3e23de108b2c24109c62333f3b54e

Author: Juha Heiskanen

source/6LoWPAN/ws/ws_bootstrap.c

@@ -634,6 +634,7 @@ uint16_t ws_etx_read(protocol_interface_info_entry_t *interface, addrtype_t addr
 
     mac_neighbor_table_entry_t *mac_neighbor = mac_neighbor_table_address_discover(mac_neighbor_info(interface), addr_ptr + PAN_ID_LEN, addr_type);
     if (!mac_neighbor) {
+        tr_debug("ws_etx_read Unknown Neighbor");
         return 0xffff;
     }
     attribute_index = mac_neighbor->index;
@@ -650,6 +651,9 @@ uint16_t ws_etx_read(protocol_interface_info_entry_t *interface, addrtype_t addr
                 !ws_neighbour->candidate_parent) {
             // if RSL value is not good enough candidate parent flag is removed and device not accepted as parent
             //tr_debug("ws_etx_read not valid parent");
+            if (etx_entry && etx_entry->etx_samples) {
+                tr_debug("ws_etx_read not valid %u RSL IN(%u), %u RSL out(%u)", ws_neighbor_class_rsl_in_get(ws_neighbour), ws_neighbour->rsl_in, ws_neighbor_class_rsl_out_get(ws_neighbour), ws_neighbour->rsl_out);
+            }
             return 0xffff;
         }
 
@@ -663,6 +667,7 @@ uint16_t ws_etx_read(protocol_interface_info_entry_t *interface, addrtype_t addr
         } else {
             if (!ws_neighbour->broadcast_timing_info_stored) {
                 //Global shedule is stored already
+                tr_debug("ws_etx_read not valid NO BTI");
                 return 0xffff;
             }
         }