text: #ifndef _TREE_ROUTING_H
  #define _TREE_ROUTING_H
  
  enum {
      AM_TREE_ROUTING_CONTROL = 0xCE,
      BEACON_INTERVAL = 8192, 
      INVALID_ADDR  = TOS_BCAST_ADDR,
      ETX_THRESHOLD = 50,      // link quality=20% -> ETX=5 -> Metric=50 
      PARENT_SWITCH_THRESHOLD = 15,
      MAX_METRIC = 0xFFFF,
  }; 
   
  
  typedef struct {
    am_addr_t parent;
    uint16_t etx;
    bool haveHeard;
    bool congested;
  } route_info_t;
  
  typedef struct {
    am_addr_t neighbor;
    route_info_t info;
  } routing_table_entry;
  
  inline void routeInfoInit(route_info_t *ri) {
      ri->parent = INVALID_ADDR;
      ri->etx = 0;
      ri->haveHeard = 0;
      ri->congested = FALSE;
  }
  
  #endif
  