Method: IPAddress::IPv6::Mapped#initialize

Defined in:

lib/ipaddress/ipv6.rb

#initialize(str) ⇒ Mapped

Creates a new IPv6 IPv4-mapped address

ip6 = IPAddress::IPv6::Mapped.new "::ffff:172.16.10.1/128"

ipv6.ipv4.class
  #=> IPAddress::IPv4

An IPv6 IPv4-mapped address can also be created using the IPv6 only format of the address:

ip6 = IPAddress::IPv6::Mapped.new "::0d01:4403"

ip6.to_string
  #=> "::ffff:13.1.68.3"

# File 'lib/ipaddress/ipv6.rb', line 843

def initialize(str)
  string, netmask = str.split("/")
  if string =~ /\./ # IPv4 in dotted decimal form
    @ipv4 = IPAddress::IPv4.extract(string)
  else # IPv4 in hex form
    groups = IPAddress::IPv6.groups(string)
    @ipv4 = IPAddress::IPv4.parse_u32((groups[-2]<< 16)+groups[-1])
  end
  super("::ffff:#{@ipv4.to_ipv6}/#{netmask}")
end