IPS_SEEN_REPLY_BIT 33 include/linux/netfilter/nf_conntrack_common.h IPS_SEEN_REPLY_BIT = 1, IPS_SEEN_REPLY_BIT 34 include/linux/netfilter/nf_conntrack_common.h IPS_SEEN_REPLY = (1 << IPS_SEEN_REPLY_BIT),