Odin: an SDN framework for programmable Enterprise WLANs.
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odin-agent @ e15712e Implement spectral scan handlers Sep 13, 2013
odin-driver-patches @ 00941b6 master, agent: merge with virtual-nets branch Feb 7, 2013
odin-master @ 877efd5 Implement spectral scan handlers Sep 13, 2013
visualiser Avoid displaying new clients Aug 10, 2012
README.md Use markdown for README Feb 7, 2013



Odin is an SDN framework programmable enterprise WLANs. It provides a platform for developing typical enterprise WLAN services such as mobility managers, and load balancers as "network applications".


For the agent/AP:

  • Click Modular Router.
  • Open vSwitch.
  • An ath9k driver based WiFi card.


Running Odin implies setting up the Odin master, and Odin agents.

If you cloned Odin from the git repository, pull the individual submodules:

  $: git clone http://github.com/lalithsuresh/odin
  $: cd odin
  $: git submodule init
  $: git submodule update

To build the master (which is built as an application on top of Floodlight), do the following:

  $: cd odin-master
  $: ant

You should find floodlight.jar inside target/

Before building the agent, apply the patch in odin-driver-patches to your Linux kernel ath9k driver code.

To build the agent, copy the files in odin-agent/src/ to your Click source's /elements/local folder, then build Click.

  $: cd odin-agent
  $: cp src/* <click-folder>/elements/local

Now build Click using your cross compiler. Don't forget to pass the --enable- local flag to Click's configure script.

Generate a Click file for the agent, using your preferred values for the options:

  $: python agent-click-file-gen.py <AP_CHANNEL> <QUEUE_SIZE> \
     > agent.click

Running Odin


The master is to be run on a central server that has IP reachability to all APs in the system. The master expects the following configuration parameter to be set in the floodlight configuration file:

  • net.floodlightcontroller.odin.master.OdinMaster.poolFile:

This should point to a pool file, which are essentially slices. An example poolfile is as follows:

  # Pool-1
  NAME pool-1
  APPLICATIONS net.floodlightcontroller.odin.applications.OdinMobilityManager

  # Pool-2
  NAME pool-2
  NETWORKS guest-network
  APPLICATIONS net.floodlightcontroller.odin.applications.SimpleLoadBalancer

Each pool is defined by a name, a list of IP address of physical APs, the list of SSIDs or NETWORKS to be announced, and a list of applications that operate on that pool.

  • net.floodlightcontroller.odin.master.OdinMaster.clientList [optional]:

For testing purposes, if you'd like to assign a static IP to a client and have it connect to odin, you need to specify the client's details in a file pointed to by this property. An example file looks as follows:

  00:16:7f:7e:00:00 00:1b:1b:7e:00:00 odin-ssid-1
  00:16:7f:7e:00:01 00:1b:1b:7e:00:01 odin-ssid-2
  00:16:7f:7e:00:02 00:1b:1b:7e:00:02 odin-ssid-3

Each row represents a client's MAC address, its static IP address, its LVAP's BSSID, and the SSID that its LVAP will announce.

To run the master:

  $: java -jar floodlight.jar


To run the agents, first instantiate Open vSwitch and have it connect to the Floodlight controller from above. Next, instantiate a monitor device:

  # If on OpenWRT Backfire
  $: iw phy phy0 interface add mon0 set type monitor
  $: iw dev wlan0 set channel <required-channel>
  $: ifconfig mon0 up

Then move the agent.click file generated through the click file generator to the AP, and run the following:

  $: click-align agent.click | click &

(Make sure agent.click specifies the same channel as being used by the monitor device.)

Click should have instantiated a tap device named 'ap', which should be added to Open vSwitch' datapath:

  $: ovs-dpctl add-if dp0 ap

Wait a few seconds for the agent to successfully connect to the master.


The system is described in the following Masters' thesis: http://lalithsuresh.files.wordpress.com/2011/04/lalith-thesis.pdf