Class: IPAddress::IPv6::Unspecified

Inherits:

IPAddress::IPv6

Object
IPAddress::IPv6
IPAddress::IPv6::Unspecified

show all

Defined in:: lib/ipaddress/ipv6.rb

Overview

The address with all zero bits is called the unspecified address (corresponding to 0.0.0.0 in IPv4). It should be something like this:

0000:0000:0000:0000:0000:0000:0000:0000

but, with the use of compression, it is usually written as just two colons:

::

or, specifying the netmask:

::/128

With IPAddress, create a new unspecified IPv6 address using its own subclass:

ip = IPAddress::IPv6::Unspecified.new

ip.to_s
  #=> => "::/128"

You can easily check if an IPv6 object is an unspecified address by using the IPv6#unspecified? method

ip.unspecified?
  #=> true

An unspecified IPv6 address can also be created with the wrapper method, like we’ve seen before

ip = IPAddress "::"

ip.unspecified?
  #=> true

This address must never be assigned to an interface and is to be used only in software before the application has learned its host’s source address appropriate for a pending connection. Routers must not forward packets with the unspecified address.

Constant Summary

Constants inherited from IPAddress::IPv6

IN6FORMAT

Constants included from IPAddress

AUTHORS, GEM, NAME

Instance Method Summary collapse

#initialize ⇒ Unspecified constructor

Creates a new IPv6 unspecified address.

Methods inherited from IPAddress::IPv6

#<=>, #[], #[]=, #address, #bits, #broadcast_u128, compress, #compressed, #data, #each, expand, #groups, groups, #hexs, #include?, #literal, #loopback?, #mapped?, #network, #network?, #network_u128, parse_data, parse_hex, parse_u128, #prefix, #prefix=, #reverse, #size, #to_hex, #to_i, #to_s, #to_string, #to_string_uncompressed, #unspecified?

Methods included from IPAddress

demongoize, deprecate, evolve, #ipv4?, #ipv6?, mongoize, #mongoize, ntoa, parse, valid?, valid_ipv4?, valid_ipv4_netmask?, valid_ipv6?

Constructor Details

#initialize ⇒ `Unspecified`

Creates a new IPv6 unspecified address

ip = IPAddress::IPv6::Unspecified.new

ip.to_s
   #=> => "::/128"

# File 'lib/ipaddress/ipv6.rb', line 701

def initialize
  @address = ("0000:"*8).chop
  @groups = Array.new(8,0)
  @prefix = Prefix128.new(128)
  @compressed = compress_address
end