1#ifndef _NF_CONNTRACK_TCP_H 2#define _NF_CONNTRACK_TCP_H 3/* TCP tracking. */ 4 5#include <linux/types.h> 6 7/* This is exposed to userspace (ctnetlink) */ 8enum tcp_conntrack { 9 TCP_CONNTRACK_NONE, 10 TCP_CONNTRACK_SYN_SENT, 11 TCP_CONNTRACK_SYN_RECV, 12 TCP_CONNTRACK_ESTABLISHED, 13 TCP_CONNTRACK_FIN_WAIT, 14 TCP_CONNTRACK_CLOSE_WAIT, 15 TCP_CONNTRACK_LAST_ACK, 16 TCP_CONNTRACK_TIME_WAIT, 17 TCP_CONNTRACK_CLOSE, 18 TCP_CONNTRACK_LISTEN, /* obsolete */ 19#define TCP_CONNTRACK_SYN_SENT2 TCP_CONNTRACK_LISTEN 20 TCP_CONNTRACK_MAX, 21 TCP_CONNTRACK_IGNORE 22}; 23 24/* Window scaling is advertised by the sender */ 25#define IP_CT_TCP_FLAG_WINDOW_SCALE 0x01 26 27/* SACK is permitted by the sender */ 28#define IP_CT_TCP_FLAG_SACK_PERM 0x02 29 30/* This sender sent FIN first */ 31#define IP_CT_TCP_FLAG_CLOSE_INIT 0x04 32 33/* Be liberal in window checking */ 34#define IP_CT_TCP_FLAG_BE_LIBERAL 0x08 35 36/* Has unacknowledged data */ 37#define IP_CT_TCP_FLAG_DATA_UNACKNOWLEDGED 0x10 38 39/* The field td_maxack has been set */ 40#define IP_CT_TCP_FLAG_MAXACK_SET 0x20 41 42struct nf_ct_tcp_flags { 43 __u8 flags; 44 __u8 mask; 45}; 46 47 48#endif /* _NF_CONNTRACK_TCP_H */ 49