# Fact: ipaddress6
#
# Purpose: Returns the "main" IPv6 IP address of a system.
#
# Resolution:
#  OS dependant code that parses the output of various networking
#  tools and currently not very intelligent. Returns the first
#  non-loopback and non-linklocal address found in the ouput unless
#  a default route can be mapped to a routeable interface. Guessing
#  an interface is currently only possible with BSD type systems
#  to many assumptions have to be made on other platforms to make
#  this work with the current code. Most code ported or modeled
#  after the ipaddress fact for the sake of similar functionality
#  and familiar mechanics.
#
# Caveats:
#

# Cody Herriges <c.a.herriges@gmail.com>
#
# Used the ipaddress fact that is already part of
# Facter as a template.

def get_address_after_token(output, token, return_first=false)
  ip = nil

  output.scan(/#{token} ((?>[0-9,a-f,A-F]*\:{1,2})+[0-9,a-f,A-F]{0,4})/).each do |match|
    match = match.first
    unless match =~ /fe80.*/ or match == "::1"
      ip = match
      break if return_first
    end
  end

  ip
end

Facter.add(:ipaddress6) do
  confine :kernel => :linux
  setcode do
    output = Facter::Util::Resolution.exec('/sbin/ifconfig')

    get_address_after_token(output, 'inet6 addr:')
  end
end

Facter.add(:ipaddress6) do
  confine :kernel => %w{SunOS}
  setcode do
    output = Facter::Util::Resolution.exec('/usr/sbin/ifconfig -a')

    get_address_after_token(output, 'inet6')
  end
end

Facter.add(:ipaddress6) do
  confine :kernel => %w{Darwin FreeBSD OpenBSD}
  setcode do
    output = Facter::Util::Resolution.exec('/sbin/ifconfig -a')

    get_address_after_token(output, 'inet6', true)
  end
end

Facter.add(:ipaddress6) do
  confine :kernel => :windows
  setcode do
    output = Facter::Util::Resolution.exec("#{ENV['SYSTEMROOT']}/system32/netsh interface ipv6 show address level=verbose")

    get_address_after_token(output, 'Address', true)
  end
end
