Add the IFA_FLAGS RTAttr and a couple of new flags

lib/linux/constants.rb

@@ -318,6 +318,7 @@ module Linux
   IFA_ANYCAST     = 5
   IFA_CACHEINFO   = 6
   IFA_MULTICAST   = 7
+  IFA_FLAGS       = 8
 
   IFA_F_SECONDARY      = 0x01
   IFA_F_TEMPORARY      = IFA_F_SECONDARY
@@ -328,6 +329,8 @@ module Linux
   IFA_F_DEPRECATED     = 0x20
   IFA_F_TENTATIVE      = 0x40
   IFA_F_PERMANENT      = 0x80
+  IFA_F_MANAGETEMPADDR = 0x100
+  IFA_F_NOPREFIXROUTE  = 0x200
 
   # from linux/if_arp.h - selected subset
   ARPHRD_NETROM		= 0

lib/linux/netlink/route/addr_handler.rb

@@ -24,6 +24,10 @@ module Netlink
         :pack   => lambda { |val,obj| val.to_a.pack("L*") },
         :unpack => lambda { |str,obj| IFACacheInfo.new(*(str.unpack("L*"))) }
     rtattr :multicast, IFA_MULTICAST, :l3addr
+
+    # TODO: is there any difference between flags and ifa_flags? The latter only
+    # shows up on newer kernels
+    rtattr :ifa_flags, IFA_FLAGS, :uint
   end
 
   module Route