Class: Checker

Inherits:
Object
  • Object
show all
Defined in:
lib/checker.rb

Defined Under Namespace

Modules: RBL Classes: NotFound

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(to_check) ⇒ Checker

Returns a new instance of Checker.



19
20
21
 
# File 'lib/checker.rb', line 19

def initialize(to_check)
  @ip = resolve_to_ip(to_check)
end

Instance Attribute Details

#ip ⇒ Object

Returns the value of attribute ip.



17
18
19
 
# File 'lib/checker.rb', line 17

def ip
  @ip
end

Instance Method Details

#check(&blk) ⇒ Object 



36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
 
# File 'lib/checker.rb', line 36

def check(&blk)
  rbls.each do |line|
    rbl_domain = line.strip
    name = name_to_lookup rbl_domain

    answer = resolver.query(name).answer
    if answer.length > 0
      rbl_response_code = answer.first.address
      text = resolver.query(name, Net::DNS::TXT).answer
      rbl_txt_message = text.first.nil? ? "" : text.first.txt
      ttl = text.first.nil? ? 0 : text.first.ttl

      yield({ rbl: rbl_domain, ttl: ttl, result: rbl_response_code, message: rbl_txt_message })
    else
      yield({ rbl: rbl_domain, ttl: ttl, result: "", message: 'Not Listed' })
    end
  end
end

#name_to_lookup(rbl_domain) ⇒ Object 



59
60
61
 
# File 'lib/checker.rb', line 59

def name_to_lookup(rbl_domain)
  ip.reverse.gsub(/in-addr.arpa/, rbl_domain)
end

#rbls ⇒ Object 



55
56
57
 
# File 'lib/checker.rb', line 55

def rbls
  @@rbls ||= RBL::Loader.load
end

#resolve_to_ip(name_to_lookup) ⇒ Object 



23
24
25
26
27
28
29
30
31
32
33
34
 
# File 'lib/checker.rb', line 23

def resolve_to_ip name_to_lookup
  begin
    IPAddr.new(name_to_lookup)
  rescue ArgumentError => e
    answer = Resolver(name_to_lookup).answer
    if answer.empty?
      raise NotFound.new(name_to_lookup)
    else
      answer.first.address
    end
  end
end

#resolver ⇒ Object 



63
64
65
 
# File 'lib/checker.rb', line 63

def resolver
  @resolver ||= Net::DNS::Resolver.new(:nameservers => ['8.8.8.8','8.8.4.4'] * 10, :log_file => nil)
end