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) */ 8 enum 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 42 struct nf_ct_tcp_flags { 43 __u8 flags; 44 __u8 mask; 45 }; 46 47 48 #endif /* _NF_CONNTRACK_TCP_H */ 49
