#!/usr/bin/ruby
-# Copyright 2006 Peter Palfrader
+# Copyright 2006, 2012 Peter Palfrader
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+require 'ipaddr'
require 'resolv'
require 'optparse'
require 'yaml'
warnings = []
oks = []
+def resolve_ns(dns, domain, nameserver)
+ puts "Getting A record for nameserver #{nameserver} for #{domain}" if @verbose > 0
+ arecords = dns.getresources(nameserver, Resolv::DNS::Resource::IN::A)
+ warnings << "Nameserver #{nameserver} for #{domain} has #{arecords.length} A records" if arecords.length != 1
+ addresses = arecords.map { |a| a.address.to_s }
+ puts "Addresses for nameserver #{nameserver} for #{domain}: #{addresses.join(', ')}" if @verbose > 0
+ return addresses
+end
+
dns = Resolv::DNS.new
ARGV.each{ |domain|
serial = []
nameservers = dns.getresources(domain, Resolv::DNS::Resource::IN::NS)
nameservernames = nameservers.collect{ |ns| ns.name.to_s }
- nameservernames = nameservernames.concat @additional_nameservers
- nameservernames.each{ |nameserver|
+ nameserver_addresses = {}
+ nameservernames.each do |nameserver|
+ addrs = resolve_ns(dns, domain, nameserver)
+ warnings << "Duplicate nameserver #{nameserver} for #{domain}" if nameserver_addresses[nameserver]
+ nameserver_addresses[nameserver] = addrs
+ end
+ @additional_nameservers.each do |ns|
+ begin
+ ipa = IPAddr.new(ns) # check if it's an address
+ addrs = [ns]
+ rescue ArgumentError
+ addrs = resolve_ns(dns, domain, ns)
+ end
+ warnings << "Duplicate nameserver #{ns} for #{domain}" if nameserver_addresses[ns]
+ nameserver_addresses[ns] = addrs
+ end
+
+ nameserver_addresses.each_pair do |nameserver, addrs|
puts "Testing nameserver #{nameserver} for #{domain}" if @verbose > 0
- arecords = dns.getresources(nameserver, Resolv::DNS::Resource::IN::A)
- warnings << "Nameserver #{nameserver} for #{domain} has #{arecords.length} A records" if arecords.length != 1
- arecords.each{ |a|
- puts " Nameserver #{nameserver} is at #{a.address}" if @verbose > 0
+ addrs.each do |a|
+ puts " Nameserver #{nameserver} is at #{a}" if @verbose > 0
begin
- resolver = Resolv::DNS.new({:nameserver => a.address.to_s})
+ resolver = Resolv::DNS.new({:nameserver => a})
soas = resolver.getresources(domain, Resolv::DNS::Resource::IN::SOA)
rescue SystemCallError => e
warnings << "Could not resolve #{domain} on #{nameserver}: #{e.message}"
else
resolver.close
warnings << "Nameserver #{nameserver} for #{domain} returns #{soas.length} SOAs" if soas.length != 1
- soas.each{ |soa|
+ soas.each do |soa|
puts " Nameserver #{nameserver} returns serial #{soa.serial} for #{domain}" if @verbose > 0
serial << soa.serial unless serial.include? soa.serial
- }
+ end
end
- }
- }
+ end
+ end
case serial.length
when 0
warnings << "Found no serials for #{domain}"