Module: Async::DNS

Defined in:
lib/async/dns/chunked.rb,
lib/async/dns.rb,
lib/async/dns/server.rb,
lib/async/dns/system.rb,
lib/async/dns/handler.rb,
lib/async/dns/message.rb,
lib/async/dns/replace.rb,
lib/async/dns/version.rb,
lib/async/dns/resolver.rb,
lib/async/dns/transport.rb,
lib/async/dns/transaction.rb

Overview

Copyright, 2009, 2012, by Samuel G. D. Williams. <www.codeotaku.com>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Defined Under Namespace

Modules: Replace, System Classes: DatagramHandler, GenericHandler, IPSocket, InvalidProtocolError, InvalidResponseError, ResolutionFailure, Resolver, Server, StreamHandler, Transaction, Transport

Constant Summary collapse

UDP_TRUNCATION_SIZE = 
512
Message =

The DNS message container.

::Resolv::DNS::Message
DecodeError = 
::Resolv::DNS::DecodeError
VERSION = 
'1.3.0'

Class Method Summary collapse

Class Method Details

.address_family(host) ⇒ Object 



28
29
30
 
# File 'lib/async/dns/transport.rb', line 28

def self.address_family(host)
	return IPAddr.new(host).family
end

.chunked(string, chunk_size = 255) ⇒ Object

Produces an array of arrays of binary data with each sub-array a maximum of chunk_size bytes.



23
24
25
26
27
28
29
30
31
32
33
 
# File 'lib/async/dns/chunked.rb', line 23

def self.chunked(string, chunk_size = 255)
	chunks = []
	
	offset = 0
	while offset < string.bytesize
		chunks << string.byteslice(offset, chunk_size)
		offset += chunk_size
	end
	
	return chunks
end

.decode_message(data) ⇒ Object

Decodes binary data into a Message.



36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
 
# File 'lib/async/dns/message.rb', line 36

def self.decode_message(data)
	# Otherwise the decode process might fail with non-binary data.
	if data.respond_to? :force_encoding
		data.force_encoding("BINARY")
	end
	
	begin
		return Message.decode(data)
	rescue DecodeError
		raise
	rescue StandardError => error
		new_error = DecodeError.new(error.message)
		new_error.set_backtrace(error.backtrace)
		
		raise new_error
	end
end