IPT_ECN_OP_MATCH_MASK 93 net/ipv4/netfilter/ipt_ecn.c if (info->operation & IPT_ECN_OP_MATCH_MASK) IPT_ECN_OP_MATCH_MASK 96 net/ipv4/netfilter/ipt_ecn.c if (info->invert & IPT_ECN_OP_MATCH_MASK)