old_contents: # Copyright 2012 James McCauley
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at:
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  """
  Turns your complex OpenFlow switches into stupid hubs.
  """
  
  from pox.core import core
  import pox.openflow.libopenflow_01 as of
  from pox.lib.util import dpidToStr
  
  log = core.getLogger()
  
  
  def _handle_ConnectionUp (event):
    msg = of.ofp_flow_mod()
    msg.actions.append(of.ofp_action_output(port = of.OFPP_FLOOD))
    event.connection.send(msg)
    log.info("Hubifying %s", dpidToStr(event.dpid))
  
  def launch ():
    core.openflow.addListenerByName("ConnectionUp", _handle_ConnectionUp)
  
    log.info("Hub running.")
  
new_contents: # Copyright 2012 James McCauley
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at:
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  """
  Turns your complex OpenFlow switches into stupid hubs.
  
  There are actually two hubs in here -- a reactive one and a proactive one.
  """
  
  from pox.core import core
  import pox.openflow.libopenflow_01 as of
  from pox.lib.util import dpidToStr
  
  log = core.getLogger()
  
  
  def _handle_ConnectionUp (event):
    """
    Be a proactive hub by telling every connected switch to flood all packets
    """
    msg = of.ofp_flow_mod()
    msg.actions.append(of.ofp_action_output(port = of.OFPP_FLOOD))
    event.connection.send(msg)
    log.info("Hubifying %s", dpidToStr(event.dpid))
  
  
  def _handle_PacketIn (event):
    """
    Be a reactive hub by flooding every incoming packet
    """
    msg = of.ofp_packet_out()
    msg.data = event.ofp
    msg.actions.append(of.ofp_action_output(port = of.OFPP_FLOOD))
    event.connection.send(msg)
  
  
  def launch (reactive = False):
    if reactive:
      core.openflow.addListenerByName("PacketIn", _handle_PacketIn)
      log.info("Reactive hub running.")
    else:
      core.openflow.addListenerByName("ConnectionUp", _handle_ConnectionUp)
      log.info("Proactive hub running.")
  
subject: Add reactive hub mode