find_node_by_addr_A
node_real = find_node_by_addr_A(node_db, hsr_sp->macaddress_A);
node_dst = find_node_by_addr_A(&port->hsr->node_db,
node_dst = find_node_by_addr_A(&port->hsr->proxy_node_db,
return !!find_node_by_addr_A(node_db, addr);
node = find_node_by_addr_A(&hsr->node_db, addr);