Class: DIY::Controller

Inherits:
Object
  • Object
show all
Defined in:
lib/diy/controller.rb

Instance Method Summary collapse

Constructor Details

#initialize(client, server, offline, strategy) ⇒ Controller

Returns a new instance of Controller.



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# File 'lib/diy/controller.rb', line 6

def initialize( client, server, offline, strategy)
  @client = client
  @server = server
  @offline = offline
  @strategy = strategy
  @before_send = nil
  @timeout = nil
  @error_on_stop = nil
end

Instance Method Details

#before_send(&block) ⇒ Object 



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# File 'lib/diy/controller.rb', line 146

def before_send(&block)
  @before_send = block
end

#client_send(client, pkts) ⇒ Object 



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# File 'lib/diy/controller.rb', line 122

def client_send(client, pkts)
  if @before_send
    pkts = pkts.collect do |pkt| 
      content = pkt.content
      begin
        pkt.content = @before_send.call(content)
      rescue Exception => e
        DIY::Logger.warn("UserError Catch: " + error = BeforeSendCallError.new(e) )
        error.backtrace.each do |msg|
          DIY::Logger.info(msg)
        end
        raise error
      end
      pkt
    end
  end
  begin
    client.inject(pkts)
  rescue FFI::PCap::LibError =>e
    DIY::Logger.warn("SendPacketError Catch: " + e )
    raise e
  end
end

#do_trap ⇒ Object 



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# File 'lib/diy/controller.rb', line 71

def do_trap
  Signal.trap("INT") do
    DIY::Logger.info "bye.."
    stop
    exit 0
  end    
end

#error_on_stop ⇒ Object 



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# File 'lib/diy/controller.rb', line 154

def error_on_stop(*)
  @error_on_stop = true
end

#offline_result ⇒ Object 



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# File 'lib/diy/controller.rb', line 163

def offline_result
  sprintf "%4d files, %8d packets", @offline.files_size, @offline.now_size
end

#one_round(client, server, pkts) ⇒ Object 



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# File 'lib/diy/controller.rb', line 84

def one_round( client, server, pkts )
  @error_flag = nil
  @round_count = 0 unless @round_count
  @round_count += 1
  DIY::Logger.info "round #{@round_count}: (c:#{client.__drburi} / s:#{server.__drburi}) #{pkts[0].pretty_print}:(queue= #{pkts.size})"
  if pkts.size >= 10
    DIY::Logger.info "queue size too big: #{pkts.size}, maybe something error"
  end
  
  recv_pkt_proc_set( pkts )
  @ready = false
  server.ready(&@recv_pkt_proc)
  @ready = true
  client_send(client, pkts)
  wait_recv_ok(pkts)
  server.terminal
end

#recv_pkt_proc_set(queue) ⇒ Object

设置回调入口, 由 worker 通过DRb 远程调用



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# File 'lib/diy/controller.rb', line 103

def recv_pkt_proc_set(queue)
  @queue_keeper = queue
  # 不重新赋值, 防止 DRb 回收

  @recv_pkt_proc ||= lambda do |recv_pkt|
    begin
      next unless @ready # strip this recv pkt unless it's ready to.

      next if @error_flag # error accur waiting other thread do with it

      @recv_pkt_keeper = Packet.new(recv_pkt)
      @strategy.call(@queue_keeper.first, @recv_pkt_keeper, @queue_keeper)
    rescue DIY::UserError =>e
      DIY::Logger.warn("UserError Catch: " + e.inspect)
      e.backtrace.each do |msg|
        DIY::Logger.info(msg)
      end
      @error_flag = e
    end        
  end
end

#run ⇒ Object 



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# File 'lib/diy/controller.rb', line 16

def run
  do_trap
  client = @client
  server = @server
  
  @fail_count = 0
  start_time = Time.now
  #clear

  client.terminal
  server.terminal
  
  loop do
    begin
      pkts, where = @offline.nexts
      case where
      when :A
        client, server = @client, @server
      when :B
        client, server = @server, @client
      end
      one_round( client, server, pkts )
    rescue HopePacketTimeoutError, UserError, FFI::PCap::LibError => e
      DIY::Logger.warn( "Timeout: Hope packet is #{pkts[0].pretty_print} ") if e.kind_of?(HopePacketTimeoutError)
      @fail_count += 1
      if @error_on_stop and e.kind_of?(HopePacketTimeoutError)
        client.terminal
        server.terminal
        DIY::Logger.info "Error_on_stop flag opened, stopping..."
        DIY::Logger.info "Dump mac learn table(size is #{@offline.mac_learner.size})... "
        DIY::Logger.info @offline.mac_learner.dump
        break
      end
      begin
        @offline.next_pcap
        client.terminal
        server.terminal
      rescue EOFError
        client.terminal
        server.terminal
        break
      end
      #~ client,server = @client, @server

    rescue EOFError
      client.terminal
      server.terminal
      break
    ensure
      #~ client, server = server, client

    end
  end
  DRb.stop_service
  end_time = Time.now
  stats_result( end_time - start_time, @fail_count )
end

#stats_result(cost_time, fail_count) ⇒ Object 



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# File 'lib/diy/controller.rb', line 158

def stats_result( cost_time, fail_count )
  DIY::Logger.info " Finished in #{cost_time} seconds"
  DIY::Logger.info " #{offline_result}, #{fail_count} failures"
end

#stop ⇒ Object 



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# File 'lib/diy/controller.rb', line 79

def stop
  @client.terminal
  @server.terminal
end

#timeout(timeout) ⇒ Object 



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# File 'lib/diy/controller.rb', line 150

def timeout(timeout)
  @timeout = timeout
end

#wait_recv_ok(pkts) ⇒ Object 



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# File 'lib/diy/controller.rb', line 167

def wait_recv_ok(pkts)
  wait_until(@timeout ||= 10) do
    if @error_flag
      raise @error_flag
    end
    pkts.empty?
  end
end

#wait_until(timeout = 10, &block) ⇒ Object 



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# File 'lib/diy/controller.rb', line 176

def wait_until( timeout = 10, &block )
  Timeout.timeout(timeout, DIY::HopePacketTimeoutError.new("hope packet wait timeout after #{timeout} seconds") ) do
    loop do
      break if block.call
      sleep 0.01
    end
  end
end