static ActionSkBuff filter_l4_proto(arguments_t args, SkBuff b) { const u8 proto = GET_ARG(u8, args); return is_l4_proto(b, proto) ? Pass(b) : Drop(b); }
static bool pred_is_l4_proto(arguments_t args, SkBuff b) { const u8 protocol = GET_ARG(u8, args); return is_l4_proto(b, protocol); }