class Net::SFTP::Protocol::Base

provides a way for subclasses to send requests.
SFTP protocol version. It implements general packet parsing logic, and
The abstract superclass of the specific implementations for each supported

def initialize(session)

Create a new instance of a protocol driver, servicing the given session. 
def initialize(session)
  @session = session
  self.logger = session.logger
  @request_id_counter = -1
end

def parse(packet)

(the keys in the hash are packet-type specific).
type, an exception will be raised. Returns the parsed data as a hash
Attept to parse the given packet. If the packet is of an unsupported 
def parse(packet)
  case packet.type
  when FXP_STATUS then parse_status_packet(packet)
  when FXP_HANDLE then parse_handle_packet(packet)
  when FXP_DATA   then parse_data_packet(packet)
  when FXP_NAME   then parse_name_packet(packet)
  when FXP_ATTRS  then parse_attrs_packet(packet)
  else raise NotImplementedError, "unknown packet type: #{packet.type}"
  end
end

def send_request(type, *args)

be returned.
A new request identifier will be allocated to this request, and will
Send a new packet of the given type, and with the given data arguments. 
def send_request(type, *args)
  @request_id_counter += 1
  session.send_packet(type, :long, @request_id_counter, *args)
  return @request_id_counter
end