Protocol tree display proto_item_add_subtree Adds a new subtree to the protocol tree proto_tree_add_xxx[_format] Adds an item to the subtree for display and searching proto_tree_add_xxx_hidden Adds an item to the subtree for searching only proto_item_set_len Sets the length for an item proto_tree_add_notext & proto_tree_set_text Adds an item without text Later add the text