Class: Arpoon

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/arpoon/version.rb,
lib/arpoon.rb,
lib/arpoon/route.rb,
lib/arpoon/table.rb,
lib/arpoon/client.rb,
lib/arpoon/packet.rb,
lib/arpoon/interface.rb,
lib/arpoon/controller.rb

Overview

–

          DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                  Version 2, December 2004

          DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

0. You just DO WHAT THE FUCK YOU WANT TO.

++

Defined Under Namespace

Classes: Client, Controller, Interface, Packet, Route, Table

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Arpoon

Returns a new instance of Arpoon.



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# File 'lib/arpoon.rb', line 30

def initialize
	@commands    = {}
	@connections = []
	@interfaces  = {}
	@any         = []

	reload_table!

	any {
		on :packet do |packet|
			if packet.request?
				packet.interface.fire :request, packet, packet.interface
			else
				packet.interface.fire :reply, packet, packet.interface
			end

			if packet.destination.broadcast?
				packet.interface.fire :broadcast, packet, packet.interface
			end
		end
	}

	controller_at '/var/run/arpoon.ctl'
	logs_at       '/var/log/arpoon.log'
end

Instance Attribute Details

#interfaces ⇒ Object (readonly)

Returns the value of attribute interfaces.



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# File 'lib/arpoon.rb', line 28

def interfaces
  @interfaces
end

Class Method Details

.method_missing(*args, &block) ⇒ Object 



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# File 'lib/arpoon.rb', line 24

def self.method_missing (*args, &block)
	instance.__send__ *args, &block
end

.version ⇒ Object 



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# File 'lib/arpoon/version.rb', line 12

def self.version
	'0.0.1.1'
end

Instance Method Details

#any(&block) ⇒ Object 



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# File 'lib/arpoon.rb', line 184

def any (&block)
	@interfaces.each_value {|interface|
		interface.load(&block)
	}

	@any << block
end

#broadcast(*args) ⇒ Object 



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# File 'lib/arpoon.rb', line 146

def broadcast (*args)
	@connections.each {|conn|
		conn.send_response(*args)
	}
end

#command(*args, &block) ⇒ Object 



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# File 'lib/arpoon.rb', line 152

def command (*args, &block)
	if block
		command = args.first.to_sym

		@commands[command] = block
	else
		controller = args.shift
		command    = args.shift

		controller.instance_exec *args, &@commands[command.to_sym]
	end
rescue Exception => e
	log e, "command: #{command}"
end

#connected(controller) ⇒ Object 



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# File 'lib/arpoon.rb', line 138

def connected (controller)
	@connections << controller
end

#controller_at(path) ⇒ Object 



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# File 'lib/arpoon.rb', line 56

def controller_at (path)
	@controller_at = File.expand_path(path)
end

#disconnected(controller) ⇒ Object 



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# File 'lib/arpoon.rb', line 142

def disconnected (controller)
	@connections.delete(controller)
end

#interface(name, &block) ⇒ Object 



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# File 'lib/arpoon.rb', line 167

def interface (name, &block)
	unless @interfaces.member? name
		@interfaces[name] = Interface.new(name)

		@any.each {|block|
			@interfaces[name].load(&block)
		}

		EM.schedule {
			@interfaces[name].start if started?
		}
	end

	@interfaces[name].load(&block) if block
	@interfaces[name]
end

#load(path = nil, &block) ⇒ Object 



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# File 'lib/arpoon.rb', line 128

def load (path = nil, &block)
	if path
		instance_eval File.read(File.expand_path(path)), path, 1
	else
		instance_exec &block
	end

	self
end

#log(what, group = nil) ⇒ Object 



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# File 'lib/arpoon.rb', line 65

def log (what, group = nil)
	io = StringIO.new

	io.print "[#{Time.now}#{", #{group}" if group}] "

	if what.is_a? Exception
		io.puts "#{what.class.name}: #{what.message}"
		io.puts what.backtrace
	else
		io.puts what
	end

	io.string.tap {|text|
		$stderr.puts text

		File.open(@logs_at, 'a') { |f| f.print text }
	}
end

#logs_at(path) ⇒ Object 



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# File 'lib/arpoon.rb', line 60

def logs_at (path)
	@logs_at = File.expand_path(path)
end

#reload_table! ⇒ Object 



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# File 'lib/arpoon.rb', line 120

def reload_table!
	@table = Table.new
end

#route ⇒ Object 



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# File 'lib/arpoon.rb', line 124

def route
	Route.new
end

#start ⇒ Object 



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# File 'lib/arpoon.rb', line 84

def start
	return if started?

	@started = true

	@interfaces.each_value {|interface|
		interface.start
	}

	File.umask(0).tap {|old|
		begin
			@signature = EM.start_server(@controller_at, Controller)
		ensure
			File.umask(old)
		end
	}
end

#started? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/arpoon.rb', line 63

def started?; @started; end

#stop ⇒ Object 



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# File 'lib/arpoon.rb', line 102

def stop
	return unless started?

	@interfaces.each_value {|interface|
		interface.stop
	}

	if @signature
		EM.stop_server @signature
	end

	@started = false
end

#table ⇒ Object 



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# File 'lib/arpoon.rb', line 116

def table
	@table || reload_table!
end