删除与特定cookie匹配的流 - OpenVSwitch对OpenFlow 1.3.5规范的支持

根据OpenFlow 1.3.5规范，第44页指定了以下内容：

如果cookie_mask字段包含0以外的值，则还可以通过cookie值过滤修改和删除命令 . 此约束是由flow mod的cookie字段和flow条目的cookie值中的cookie_mask指定的位必须等于 . 换句话说，（flow entry.cookie＆flow mod.cookie mask）==（flow mod.cookie＆flow mod.cookie mask） .

现在，使用基于Ryu python的控制器，我尝试通过指定流的cookie值来删除流，但过程不成功 .

以下代码是我使用的测试示例 .

from ryu.base.app_manager import RyuApp
from ryu.controller.dpset import EventDP
from ryu.controller.handler import MAIN_DISPATCHER
from ryu.controller.handler import set_ev_cls
from ryu.ofproto import ofproto_v1_3
from ryu.ofproto import ether, inet

class MPLS_Testing(RyuApp):
  OFP_VERSIONS = [ofproto_v1_3.OFP_VERSION]

  @set_ev_cls(EventDP, MAIN_DISPATCHER)
  def switch_connect_event(self, ev):
    ofp_parser = ev.dp.ofproto_parser
    ofp = ev.dp.ofproto
    datapath_obj = ev.dp
    if ev.enter:
      datapath_obj.send_msg(  # Removes all flows registered in this switch.
        ofp_parser.OFPFlowMod(
          datapath=datapath_obj,
          table_id=ofp.OFPTT_ALL,
          command=ofp.OFPFC_DELETE,
          out_port=ofp.OFPP_ANY,
          out_group=ofp.OFPG_ANY,
        )
      )
      add_label_flow = ofp_parser.OFPFlowMod(
        datapath=datapath_obj,            
        cookie=1,        
        table_id=0,
        command=ofp.OFPFC_ADD,
        match=ofp_parser.OFPMatch(
          in_port=1
        ),
        instructions=[
          ofp_parser.OFPInstructionActions(
            ofp.OFPIT_APPLY_ACTIONS,
            [
              ofp_parser.OFPActionPushMpls(),
              ofp_parser.OFPActionSetField(mpls_label=16),
            ]
          ),
          ofp_parser.OFPInstructionGotoTable(table_id=1),
        ]
      )
      datapath_obj.send_msg(add_label_flow)

      add_label_flow2 = ofp_parser.OFPFlowMod(
        datapath=datapath_obj,            
        cookie=2,
        table_id=1,
        command=ofp.OFPFC_ADD,            
        match=ofp_parser.OFPMatch(
          in_port=1
        ),
        instructions=[
          ofp_parser.OFPInstructionActions(
            ofp.OFPIT_APPLY_ACTIONS,
            [
              ofp_parser.OFPActionPushMpls(),
              ofp_parser.OFPActionSetField(mpls_label=12),
            ]
          ),
          ofp_parser.OFPInstructionGotoTable(table_id=2),
        ]
      )
      datapath_obj.send_msg(add_label_flow2)

      # Deletes flow with cookie equal to 2.
      datapath_obj.send_msg(
        ofp_parser.OFPFlowMod(
          cookie=2,
          cookie_mask=0xFFFFFFFFFFFFFFFF,
          datapath=datapath_obj,
          command=ofp.OFPFC_DELETE,
          out_port=ofp.OFPP_ANY,
          out_group=ofp.OFPG_ANY,
        )
      )

任何人都可以告诉我，当从表中删除流时，OpenVSwitch 2.9是否支持cookie匹配？ OpenFlow 1.3.5规范明确指出，当cookie_mask不为零时，Delete命令也可以使用cookie值过滤流 . 目前，我有点迷失在这里 .