Tres is a framework and set of helper libraries to develop OpenFlow controllers in Elixir.
def deps do
[
{:tres, "~> 0.1.2"}
]
endconfig :tres,
callback_module: Tres.ExampleHandler,
callback_args: []To use Tres.Controller with your code, set the handler callback_module to your callback module.
This module must implement the Module.start_link/1 that returns on_start.
Set the callback_args to the terms you want pass to the start_link/2 callback function.
% cat lib/sample.ex
defmodule Sample do
use GenServer
use Tres.Controller
def start_link([datapath_id, _start_args]) do
GenServer.start_link(__MODULE__, [datapath_id])
end
def init([datapath_id]) do
# As an example create a flow to receive all packet_ins from port 1
redirect_action = Output.new(:controller)
apply_ins = ApplyActions.new(redirect_action)
match = Match.new(in_port: 1)
:ok = send_flow_mod_add(datapath_id,
priority: 1,
match: match,
instructions: [apply_ins])
{:ok, datapath_id}
end
def handle_info(%PacketIn{} = packet_in, datapath_id) do
# print the packet_in message struct
IO.inspect(packet_in)
{:noreply, datapath_id}
end
end
$ iex -S mix- learning-switch: Simple Layer2 switch
- leader-example: Simple election based multiple controller using Ulf Wiger's Locks Leader
- patch_panel: inteligent patch_panel example
- simple_router: An OpenFlow controller that emulates layer 3 switch (router).
- nx_learning_switch: Example for very simple-minded L2 switch using NXAST_LEARN action.
Tres is released under the SUSHI-WARE LICENSE.
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