From 548f00716f483876d00532bf76deec6c4171e9d6 Mon Sep 17 00:00:00 2001
From: Michael Miller <icy.arctic.fox@gmail.com>
Date: Mon, 14 Nov 2016 14:33:13 -0700
Subject: Implement unique_local? method

---
 lib/ipaddress/ipv6.rb | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/lib/ipaddress/ipv6.rb b/lib/ipaddress/ipv6.rb
index 6850c03..1012d7d 100644
--- a/lib/ipaddress/ipv6.rb
+++ b/lib/ipaddress/ipv6.rb
@@ -436,6 +436,20 @@ module IPAddress;
       [self.class.new("fe80::/64")].any? {|i| i.include? self}
     end
 
+    #
+    # Checks if an IPv6 address objects belongs
+    # to a unique-local network RFC4193
+    #
+    # Example:
+    #
+    #   ip = IPAddress "fc00::1"
+    #   ip.unique_local?
+    #     #=> true
+    #
+    def unique_local?
+      [self.class.new("fc00::/7")].any? {|i| i.include? self}
+    end
+
     # 
     # Returns true if the address is a mapped address
     # 
-- 
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