[pox-dev] add rules proactively - send flow to two or more ports

[yona at gteccom.uff.br]

Hello everyone,
 
I´m using mininet and POX and I have two questions:
II) How do I add a flow_mod without being involved in an event? I want to
install proactively rules in the switches, but I only have achieved this
when listening events. I didn't find any such thing on Internet. When I
make simple applications like the one below, it works, but I need to
install rules proactively.
(Using: sudo mn --topo single,3 --mac --switch ovsk --controller remote)
....
class Simples (object):
  def __init__ (self):
    core.openflow.addListeners(self)
       
  def _handle_ConnectionUp (self, event):
    self._install(event.connection.dpid,1,(2,3))
    self._install(event.connection.dpid,2,(1,3))
    self._install(event.connection.dpid,3,(1,2))
    
  def _install(self,switch,in_port,out_port):
          msg = of.ofp_flow_mod()
          match = of.ofp_match()
          match.in_port = in_port
          msg.match = match
          msg.idle_timeout = 0
          msg.hard_timeout = 0
          for i in range(len(out_port)):
              msg.actions.append(of.ofp_action_output(port = out_port[i]))
          core.openflow.sendToDPID(switch,msg)
           
def launch ():
  core.registerNew(Simples)
 

II)How do I add a rule which sends a flow to two or more ports? Using dpctl
just put the ports and it works well (e.g.
in_port=2,actions=output:1,output:3), and in a application, how would I do
that? I tried as above, which works weel when I have two ports, but when I
need to install rules that sends flows to one and more ports together :
...
   self._install(event.connection.dpid,2,(1,3))    
self._install(event.connection.dpid,1,2))
   ...
    
it doesn't work:

  File "/home/mininet/pox/pox/lib/revent/revent.py", line 234, in
raiseEventNoErrors
    return self.raiseEvent(event, *args, **kw)
  File "/home/mininet/pox/pox/lib/revent/revent.py", line 281, in
raiseEvent
    rv = event._invoke(handler, *args, **kw)
  File "/home/mininet/pox/pox/lib/revent/revent.py", line 159, in _invoke
    return handler(self, *args, **kw)
  File "/home/mininet/pox/ext/swbasico2.py", line 36, in
_handle_ConnectionUp
    self._install(event.connection.dpid,3,1)
  File "/home/mininet/pox/ext/swbasico2.py", line 46, in _install
    for i in range(len(out_port)):
TypeError: object of type 'int' has no len()
 

Please, could you help me with that?
 
Many thanks in advance,
Yona Lopes
 
 

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 acredita-se estar livre de perigo.

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