There are any number of ways you might do this. Two examples... One would be to have your POX component just watch the config file to see if it changes. When it changes, reconfigure.
POX also contains the messenger subsystem which is infrastructure for communicating with outside applications over JSON, which it can do over TCP or HTTP (further "transports" can be added). The POXDesk web UI uses this to configure POX logging and switch flow tables "live" without restarting POX. Hope that helps. -- Murphy On Apr 22, 2013, at 9:13 PM, Eric Chou wrote: > Hi, apologies if this has been asked before, seems this should've been asked > but I couldn't find it in the pox-dev archive. > > Can somebody point me the direction on how to update the component without > restarting the controller? For example, I wrote a component that redirect > flow traffic to a 'sniffer' port thru several switches. This is the topology, > http://3.bp.blogspot.com/-BWiv9Kvn_-c/UXQVIT67p0I/AAAAAAAAAOA/8WEdV_TlasY/s1600/Topology_Simulation.png, > h1 <> h2, h3 <> h4, h6 <> h7 all have bi-dir flows installed based on ports. > Then I carbon copy the traffic on h1 to e6 on s1, traffic on h6 to e7 on s2, > then both traffic redirects to e11 on s3 that connects to an analysis host. > This is all running fine, the code is here > https://github.com/ericchou-python/PyTapDEMON/blob/master/ext/echou_pytapFinal.py. > > > But suppose I have a web frontend that allows user to pick and choose which > source port to start/stop sniff traffic. Currently I take the input and put > that into a text file, the component reads that file and parse it out into > the specific mirror ports/destination. Every time I make a change, I need to: > > 1. write the updated information to that text file. > 2. restart the pox controller: "./pox.py <myComponent>" > > The switch usually registers pretty fast, but there is still a delay. I > wonder if there is a to dynamically write that information somewhere and do > an in-place update without restarting the controller? > > Thanks in advance for your help, :) > > Eric
