frame.rb

# Strip leading and trailing bytes
def self.decode data, &blk
  while msg = data.slice!(/\000([^\377]*)\377/)
    msg.gsub!(/^\x00|\xff$/, '')
    yield msg
  end
end

server.rb

# when the connection receives data from the client
# we either handshake or handle the message at 
# the app layer
def receive_data data
  unless @connected
    handshake data
  else
    Frame.decode(data) { |msg| on_receive msg }
  end
end