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
  1. 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:



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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