Trema is an OpenFlow controller programming framework that provides everything needed to create OpenFlow controllers in Ruby. It provides a high-level OpenFlow library and also a network emulator that can create OpenFlow-based networks for testing on your PC. This self-contained environment helps streamlines the entire process of development and testing.

• Ruby 2.0.0 or higher (RVM).
• Open vSwitch (apt-get install openvswitch-switch).

See https://relishapp.com/trema/trema/docs for links to documentation for all APIs.

Study sample code for implementation examples of Trema features. Each sample code project is executable source example of how to write a OpenFlow controller using Trema Ruby API.

• trema/hello_trema
• trema/repeater_hub
• trema/patch_panel
• trema/cbench
• trema/learning_switch
• trema/switch_monitor
• trema/simple_router
• trema/topology
• trema/routing_switch

Special thanks to all contributors for submitting patches. A full list of contributors including their patches can be found at:

https://github.com/trema/trema/contributors

Trema is released under the GNU General Public License version 2.0 or MIT License:

• http://www.gnu.org/licenses/gpl-2.0.html
• http://www.opensource.org/licenses/MIT