XT_DSCP_MASK       15 include/uapi/linux/netfilter/xt_ecn.h #define XT_ECN_IP_MASK	(~XT_DSCP_MASK)
XT_DSCP_MASK       15 include/uapi/linux/netfilter_ipv4/ipt_ECN.h #define IPT_ECN_IP_MASK	(~XT_DSCP_MASK)