1 files changed, 47 insertions, 0 deletions
diff --git a/lib/facter/netmask_ipv6.rb b/lib/facter/netmask_ipv6.rb
new file mode 100644
index 0000000..5261485
--- /dev/null
+++ b/lib/facter/netmask_ipv6.rb
@@ -0,0 +1,47 @@
+require 'ipaddr'
+
+def netmask6(value)
+  if value
+    ip = IPAddr.new('::0').mask(value)
+    ip.inspect.split('/')[1].gsub('>', '')
+  end
+end
+
+if Facter.value('facterversion')[0].to_i < 3
+  Facter::Util::IP.get_interfaces.each do |interface|
+    Facter.add('netmask6_' + Facter::Util::IP.alphafy(interface)) do
+      setcode do
+        tmp = []
+        regex = %r{inet6\s+.*\s+(?:prefixlen)\s+(\d+)}x
+        output_int = Facter::Util::IP.get_output_for_interface_and_label(interface, 'netmask6')
+
+        output_int.each_line do |line|
+          prefixlen = nil
+          matches = line.match(regex)
+          prefixlen = matches[1] if matches
+
+          if prefixlen
+            value = netmask6(prefixlen)
+            tmp.push(value)
+          end
+        end
+
+        tmp.shift if tmp
+      end
+    end
+  end
+
+  Facter.add('netmask6') do
+    setcode do
+      prefixlen = nil
+      regex = %r{#{Facter.value(:ipaddress6)}.*?(?:prefixlen)\s*(\d+)}x
+
+      String(Facter::Util::IP.exec_ifconfig(['2>/dev/null'])).split(/\n/).collect do |line|
+        matches = line.match(regex)
+        prefixlen = matches[1] if matches
+      end
+
+      netmask6(prefixlen) if prefixlen
+    end
+  end
+end