Reorg to separate different NETLINK_ROUTE functions. Try adding vlan interfaces

examples/add_vlan.rb

@@ -0,0 +1,30 @@
+LIBDIR = File.expand_path(File.join(File.dirname(__FILE__), '..', 'lib'))
+$LOAD_PATH.unshift LIBDIR
+
+require 'netlink/route'
+require 'pp'
+
+nl = Netlink::Route::Socket.new
+puts "\n*** Before adding VLAN"
+pp nl.if.select { |lnk| lnk.kind?("vlan") }
+
+puts "\n*** After adding VLAN on lo"
+begin
+  nl.if.add_link(:link=>"lo",
+    :linkinfo=>Netlink::LinkInfo.new(
+    :kind=>"vlan", :data=>Netlink::VlanInfo.new(
+      :id=>1234,  #:flags => Netlink::VlanFlags.new(:flags=>Netlink::VLAN_FLAG_LOOSE_BINDING, :mask=>0xffffffff)
+  )))
+rescue Errno::EEXIST
+  puts "Already present"
+end
+pp nl.if.select { |lnk| lnk.kind?("vlan") }
+
+puts "\n*** After deleting VLANs from lo"
+nl.if.each do |lnk|
+  if lnk.kind?('vlan') && nl.if.name(lnk.link) == 'lo'
+    nl.if.delete_link(lnk.index)
+  end
+end
+pp nl.if.select { |lnk| lnk.kind?("vlan") }
+