1 #ifndef _NF_CONNTRACK_TCP_H 2 #define _NF_CONNTRACK_TCP_H 3 /* TCP tracking. */ 4 5 /* This is exposed to userspace (ctnetlink) */ 6 enum tcp_conntrack { 7 TCP_CONNTRACK_NONE, 8 TCP_CONNTRACK_SYN_SENT, 9 TCP_CONNTRACK_SYN_RECV, 10 TCP_CONNTRACK_ESTABLISHED, 11 TCP_CONNTRACK_FIN_WAIT, 12 TCP_CONNTRACK_CLOSE_WAIT, 13 TCP_CONNTRACK_LAST_ACK, 14 TCP_CONNTRACK_TIME_WAIT, 15 TCP_CONNTRACK_CLOSE, 16 TCP_CONNTRACK_LISTEN, 17 TCP_CONNTRACK_MAX, 18 TCP_CONNTRACK_IGNORE 19 }; 20 21 /* Window scaling is advertised by the sender */ 22 #define IP_CT_TCP_FLAG_WINDOW_SCALE 0x01 23 24 /* SACK is permitted by the sender */ 25 #define IP_CT_TCP_FLAG_SACK_PERM 0x02 26 27 /* This sender sent FIN first */ 28 #define IP_CT_TCP_FLAG_CLOSE_INIT 0x04 29 30 /* Be liberal in window checking */ 31 #define IP_CT_TCP_FLAG_BE_LIBERAL 0x08 32 33 struct nf_ct_tcp_flags { 34 u_int8_t flags; 35 u_int8_t mask; 36 }; 37 38 39 #endif /* _NF_CONNTRACK_TCP_H */ 40
