[pox-dev] listen to ECHO_REPLY info,raise events

[Weiyang Mo]

Hi,

Just wonder how to listen to OFPT_ECHO_REPLY information, and raise
event similar to handle_PacketIn, handle_ConnectionUp. I know that this
event is not in the Eventmixin_events in of_01.py.

I saw there're some definations in of_01.py as follows:

def handle_ECHO_REPLY (con, msg):
  #con.msg("Got echo reply")
  pass

This seems not complete. Does that mean I should rewrite this function?
I'm trying to write similar codes such as def handle_Flow_Removed but I
don't know whether I'm on the right direction..

Thanks

Weiyang