Class IPAddress::IPv6::Unspecified
In: lib/ipaddress/ipv6.rb
Parent: IPAddress::IPv6

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.

Methods

new  

Public Class methods

Creates a new IPv6 unspecified address

  ip = IPAddress::IPv6::Unspecified.new

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

[Validate]