Class: Async::DNS::GenericHandler

Inherits:
Object
  • Object
show all
Defined in:
lib/async/dns/handler.rb

Direct Known Subclasses

DatagramHandler, StreamHandler

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(server, socket) ⇒ GenericHandler

Returns a new instance of GenericHandler.



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# File 'lib/async/dns/handler.rb', line 27

def initialize(server, socket)
  @server = server
  @socket = socket
  
  @logger = @server.logger || Async.logger
end

Instance Attribute Details

#server ⇒ Object (readonly)

Returns the value of attribute server.



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# File 'lib/async/dns/handler.rb', line 34

def server
  @server
end

#socket ⇒ Object (readonly)

Returns the value of attribute socket.



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# File 'lib/async/dns/handler.rb', line 35

def socket
  @socket
end

Instance Method Details

#error_response(query = nil, code = Resolv::DNS::RCode::ServFail) ⇒ Object 



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# File 'lib/async/dns/handler.rb', line 37

def error_response(query = nil, code = Resolv::DNS::RCode::ServFail)
  # Encoding may fail, so we need to handle this particular case:
  server_failure = Resolv::DNS::Message::new(query ? query.id : 0)
  
  server_failure.qr = 1
  server_failure.opcode = query ? query.opcode : 0
  server_failure.aa = 1
  server_failure.rd = 0
  server_failure.ra = 0

  server_failure.rcode = code

  # We can't do anything at this point...
  return server_failure
end

#process_query(data, options) ⇒ Object 



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# File 'lib/async/dns/handler.rb', line 53

def process_query(data, options)
  @logger.debug "<> Receiving incoming query (#{data.bytesize} bytes) to #{self.class.name}..."
  query = nil

  begin
    query = Async::DNS::decode_message(data)
    
    return @server.process_query(query, options)
  rescue StandardError => error
    @logger.error(self, error)
    
    return error_response(query)
  end
end