Kuo-Lang Tseng et al: add ipv6 support
diff --git a/extensions/Makefile b/extensions/Makefile
index 731f5fa..4e65931 100644
--- a/extensions/Makefile
+++ b/extensions/Makefile
@@ -1,6 +1,6 @@
 #! /usr/bin/make
 
-EXT_FUNC+=802_3 nat arp arpreply ip standard log redirect vlan mark_m mark \
+EXT_FUNC+=802_3 nat arp arpreply ip ip6 standard log redirect vlan mark_m mark \
           pkttype stp among limit ulog
 EXT_TABLES+=filter nat broute
 EXT_OBJS+=$(foreach T,$(EXT_FUNC), extensions/ebt_$(T).o)