Class: DNS::Type

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

Overview

– TYPE fields are used in resource records. Note that these types are a subset of QTYPEs.

TYPE value and meaning

A 1 a host address

NS 2 an authoritative name server

MD 3 a mail destination (Obsolete - use MX)

MF 4 a mail forwarder (Obsolete - use MX)

CNAME 5 the canonical name for an alias

SOA 6 marks the start of a zone of authority

MB 7 a mailbox domain name (EXPERIMENTAL)

MG 8 a mail group member (EXPERIMENTAL)

MR 9 a mail rename domain name (EXPERIMENTAL)

NULL 10 a null RR (EXPERIMENTAL)

WKS 11 a well known service description

PTR 12 a domain name pointer

HINFO 13 host information

MINFO 14 mailbox or mail list information

MX 15 mail exchange

TXT 16 text strings ++

Direct Known Subclasses

QType

Constant Summary collapse

Values = 
{
  1  => :A,
  2  => :NS,
  3  => :MD,
  4  => :MF,
  5  => :CNAME,
  6  => :SOA,
  7  => :MB,
  8  => :MG,
  9  => :MR,
  10 => :NULL,
  11 => :WKS,
  12 => :PTR,
  13 => :HINFO,
  14 => :MINFO,
  15 => :MX,
  16 => :TXT,
  17 => :RP,
  18 => :AFSDB,
  19 => :X25,
  20 => :ISDN,
  21 => :RT,
  22 => :NSAP,
  23 => :NSAP_PTR,
  24 => :SIG,
  25 => :KEY,
  26 => :PX,
  27 => :GPOS,
  28 => :AAAA,
  29 => :LOC,
  30 => :NXT,
  31 => :EID,
  32 => :NIMLOC,
  33 => :SRV,
  34 => :ATMA,
  35 => :NAPTR,
  36 => :KX,
  37 => :CERT,
  38 => :A6,
  39 => :DNAME,
  40 => :SINK,
  41 => :OPT,
  42 => :APL,
  43 => :DS,
  44 => :SSHFP,
  45 => :IPSECKEY,
  46 => :RRSIG,
  47 => :NSEC,
  48 => :DNSKEY,
  49 => :DHCID,
  50 => :NSEC3,
  51 => :NSEC3PARAM,

  55 => :HIP,
  56 => :NINFO,
  57 => :RKEY,
  58 => :TALINK,

  99  => :SPF,
  100 => :UINFO,
  101 => :UID,
  102 => :GID,
  103 => :UNSPEC,

  249 => :TKEY,
  250 => :TSIG,
  251 => :IXFR,

  32768 => :TA,
  32769 => :DLV
}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(value) ⇒ Type

Returns a new instance of Type.



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# File 'lib/faildns/type.rb', line 149

def initialize (value)
  if value.is_a? Symbol
    @value = Values.find {|key, val| val == value}.first rescue nil
  elsif value.is_a? Integer
    @value = value
  else
    @value = value.value rescue nil
  end

  if !self.to_sym
    raise ArgumentError.new('The passed value is not a suitable type.')
  end
end

Instance Attribute Details

#value ⇒ Object (readonly)

Returns the value of attribute value.



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# File 'lib/faildns/type.rb', line 147

def value
  @value
end

Class Method Details

.length(string = nil) ⇒ Object 



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# File 'lib/faildns/type.rb', line 143

def self.length (string=nil)
  2
end

.parse(string) ⇒ Object 



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# File 'lib/faildns/type.rb', line 134

def self.parse (string)
  string.force_encoding 'BINARY'

  result = self.new(string.unpack('n').first)
  string[0, self.length] = ''

  return result
end

Instance Method Details

#==(what) ⇒ Object 



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# File 'lib/faildns/type.rb', line 167

def == (what)
  if what.is_a? Symbol
    self.to_sym == what
  elsif value.is_a? Integer
    @value == what
  else
    @value == what.value rescue false
  end
end

#pack ⇒ Object 



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# File 'lib/faildns/type.rb', line 163

def pack
  [@value].pack('n')
end

#to_s ⇒ Object 



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# File 'lib/faildns/type.rb', line 181

def to_s
  Values[@value].to_s
end

#to_sym ⇒ Object 



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# File 'lib/faildns/type.rb', line 177

def to_sym
  Values[@value]
end