+function IptParser._supported_tables( self, family )
+ local tables = { }
+ local ok, lines = pcall(io.lines,
+ (family == 6) and "/proc/net/ip6_tables_names"
+ or "/proc/net/ip_tables_names")
+
+ if ok and lines then
+ local line
+ for line in lines do
+ tables[line] = true
+ end
+ end
+
+ return tables
+end
+