From 4c759982e386e2ebdd99346c67caef3dce55e583 Mon Sep 17 00:00:00 2001
From: Mike Mackintosh <m@zyp.io>
Date: Sun, 22 Mar 2015 10:53:41 -0400
Subject: added multicast

---
 lib/ipaddress/ipv4.rb | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'lib')

diff --git a/lib/ipaddress/ipv4.rb b/lib/ipaddress/ipv4.rb
index a32a4a0..38afbb1 100644
--- a/lib/ipaddress/ipv4.rb
+++ b/lib/ipaddress/ipv4.rb
@@ -584,6 +584,20 @@ module IPAddress;
        self.class.new("192.168.0.0/16")].any? {|i| i.include? self}
     end
 
+    #
+    # Checks if an IPv4 address objects belongs
+    # to a multicast network RFC3171
+    #
+    # Example:
+    #
+    #   ip = IPAddress "224.0.0.0/4"
+    #   ip.multicast?
+    #     #=> true
+    #    
+    def multicast?
+      [self.class.new("224.0.0.0/4")].any? {|i| i.include? self}
+    end
+
     #
     # Returns the IP address in in-addr.arpa format
     # for DNS lookups
-- 
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