#!/usr/bin/ruby
-# Copyright 2006, 2012 Peter Palfrader
+# Copyright 2006, 2012, 2014 Peter Palfrader
# 2012 Uli Martens
#
# Permission is hereby granted, free of charge, to any person obtaining
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+# the each_resource function is lifted from ruby 1.9.1's resolv.rb, with the
+# minor modification that we do not unconditionally set the message's RD flag
+# to 1. Its license is:
+#
+# Copyright (C) 1993-2010 Yukihiro Matsumoto. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+
+
require 'ipaddr'
require 'resolv'
require 'optparse'
exit(1)
end
+class DSADNS < Resolv::DNS
+ attr_reader :rd
+ attr_writer :rd
+
+ def initialize(*args)
+ super
+ @rd = 1
+ end
+
+ def each_resource(name, typeclass, &proc)
+ lazy_initialize
+ requester = make_udp_requester
+ senders = {}
+ begin
+ @config.resolv(name) {|candidate, tout, nameserver, port|
+ msg = Message.new
+puts @rd
+ msg.rd = @rd
+ msg.add_question(candidate, typeclass)
+ unless sender = senders[[candidate, nameserver, port]]
+ sender = senders[[candidate, nameserver, port]] =
+ requester.sender(msg, candidate, nameserver, port)
+ end
+ reply, reply_name = requester.request(sender, tout)
+ case reply.rcode
+ when RCode::NoError
+ if reply.tc == 1 and not Requester::TCP === requester
+ requester.close
+ # Retry via TCP:
+ requester = make_tcp_requester(nameserver, port)
+ senders = {}
+ # This will use TCP for all remaining candidates (assuming the
+ # current candidate does not already respond successfully via
+ # TCP). This makes sense because we already know the full
+ # response will not fit in an untruncated UDP packet.
+ redo
+ else
+ extract_resources(reply, reply_name, typeclass, &proc)
+ end
+ return
+ when RCode::NXDomain
+ raise Config::NXDomain.new(reply_name.to_s)
+ else
+ raise Config::OtherResolvError.new(reply_name.to_s)
+ end
+ }
+ ensure
+ requester.close
+ end
+ end
+end
+
warnings = []
oks = []
addrs.each do |a|
puts " Nameserver #{nameserver} is at #{a}" if @verbose > 0
begin
- resolver = Resolv::DNS.new({:nameserver => a})
+ resolver = DSADNS.new({:nameserver => a})
+ resolver.rd = 0
soas = resolver.getresources(domain, Resolv::DNS::Resource::IN::SOA)
rescue SystemCallError => e
warnings << "Could not resolve #{domain} on #{nameserver}: #{e.message}"
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