Class: Resolv::IPv4

Relationships & Source Files
Inherits:	Object
Defined in:	lib/resolv.rb

Overview

A DNS IPv4 address.

Constant Summary

Regex =
# File 'lib/resolv.rb', line 2366

/\A(#{Regex256})\.(#{Regex256})\.(#{Regex256})\.(#{Regex256})\z/

Regex256 =

Regular expression IPv4 addresses must match.

# File 'lib/resolv.rb', line 2362
```
/0
|1(?:[0-9][0-9]?)?
|2(?:[0-4][0-9]?|5[0-5]?|[6-9])?
|[3-9][0-9]?/x
```

Class Method Summary

.create(arg)

Instance Attribute Summary

#address readonly

The raw IPv4 address as a String.

Instance Method Summary

#to_name

Turns this IPv4 address into a DNS::Name.

Class Method Details

.create(arg)

[ GitHub ]

# File 'lib/resolv.rb', line 2368


def self.create(arg)
  case arg
  when IPv4
    return arg
  when Regex
    if (0..255) === (a = $1.to_i) &&
       (0..255) === (b = $2.to_i) &&
       (0..255) === (c = $3.to_i) &&
       (0..255) === (d = $4.to_i)
      return self.new([a, b, c, d].pack("CCCC"))
    else
      raise ArgumentError.new("IPv4 address with invalid value: " + arg)
    end
  else
    raise ArgumentError.new("cannot interpret as IPv4 address: #{arg.inspect}")
  end
end

Instance Attribute Details

#address (readonly)

The raw IPv4 address as a String.

[ GitHub ]

# File 'lib/resolv.rb', line 2402


attr_reader :address

Instance Method Details

#to_name

Turns this IPv4 address into a DNS::Name.

[ GitHub ]

# File 'lib/resolv.rb', line 2415


def to_name
  return DNS::Name.create(
    '%d.%d.%d.%d.in-addr.arpa.' % @address.unpack('CCCC').reverse)
end