Class: StackHelper

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# File 'lib/diameter/stack_transport_helpers.rb', line 8

def initialize(stack)
  @all_connections = []
  @data = {}
  @stack = stack
  @loop_thread = nil
end

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# File 'lib/diameter/stack_transport_helpers.rb', line 27

def main_loop
  begin
    rs, _ws, es = IO.select(@all_connections, [], @all_connections)
  rescue RuntimeError
    return
  end

  es.each do |e|
    Diameter.logger.log(Logger::WARN, "Exception on connection #{e}")
  end

  rs.each do |r|

    existing_data = @data[r]
    if existing_data.length < 4
      msg, _src = r.recvfrom_nonblock(4 - existing_data.length)
      if msg == ''
        Diameter.logger.warn('Received 0 bytes on read, closing connection')
        r.close
        @all_connections.delete r
        @data.delete r
      else
        existing_data += msg
      end
    end

    expected_len = -1
    if existing_data.length >= 4
      expected_len = DiameterMessage.length_from_header(existing_data[0..4])
      Diameter.logger.debug("Read 4 bytes #{existing_data[0..4].inspect}, " \
                            "reading full message of length #{expected_len}")
      msg, _src = r.recvfrom_nonblock(expected_len - existing_data.length)
      existing_data += msg
      if msg == ''
        # Connection closed
        Diameter.logger.warn('Received 0 bytes on read, closing connection')
        r.close
        @all_connections.delete r
        @data.delete r
      end
    end

    if existing_data.length == expected_len
      @stack.handle_message(existing_data, r)
      @data[r] = ''
    else
      @data[r] = existing_data
    end
  end
end