Module: RubyDNS::TCPHandler

Defined in:
lib/rubydns/handler.rb

Instance Method Summary collapse

Instance Method Details

#initialize(server) ⇒ Object 



90
91
92
93
94
95
96
97
 
# File 'lib/rubydns/handler.rb', line 90

def initialize(server)
	@server = server
	
	@buffer = BinaryStringIO.new
	
	@length = nil
	@processed = 0
end

#receive_data(data) ⇒ Object 



99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
 
# File 'lib/rubydns/handler.rb', line 99

def receive_data(data)
	# We buffer data until we've received the entire packet:
	@buffer.write(data)
	
	# Message includes a 16-bit length field.. we need to see if we have received it yet:
	if @length == nil
		if (@buffer.size - @processed) < 2
			raise LengthError.new("Malformed message smaller than two bytes received")
		end
		
		# Grab the length field:
		@length = @buffer.string.byteslice(@processed, 2).unpack('n')[0]
		@processed += 2
	end
	
	if (@buffer.size - @processed) >= @length
		data = @buffer.string.byteslice(@processed, @length)
		
		options = {:peer => RubyDNS::get_peer_details(self)}
		
		UDPHandler.process(@server, data, options) do |answer|
			data = answer.encode
			
			@server.logger.debug "Writing response to client (#{data.bytesize} bytes) via TCP..."
			
			self.send_data([data.bytesize].pack('n'))
			self.send_data(data)
		end
		
		@processed += @length
		@length = nil
	end
end

#unbind ⇒ Object 



133
134
135
136
137
 
# File 'lib/rubydns/handler.rb', line 133

def unbind
	if @processed != @buffer.size
		raise LengthError.new("Unprocessed data remaining (#{@buffer.size - @processed} bytes unprocessed)")
	end
end