1 #ifndef _UAPI_NF_CONNTRACK_TCP_H 2 #define _UAPI_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 TCP_CONNTRACK_RETRANS, 23 TCP_CONNTRACK_UNACK, 24 TCP_CONNTRACK_TIMEOUT_MAX 25 }; 26 27 /* Window scaling is advertised by the sender */ 28 #define IP_CT_TCP_FLAG_WINDOW_SCALE 0x01 29 30 /* SACK is permitted by the sender */ 31 #define IP_CT_TCP_FLAG_SACK_PERM 0x02 32 33 /* This sender sent FIN first */ 34 #define IP_CT_TCP_FLAG_CLOSE_INIT 0x04 35 36 /* Be liberal in window checking */ 37 #define IP_CT_TCP_FLAG_BE_LIBERAL 0x08 38 39 /* Has unacknowledged data */ 40 #define IP_CT_TCP_FLAG_DATA_UNACKNOWLEDGED 0x10 41 42 /* The field td_maxack has been set */ 43 #define IP_CT_TCP_FLAG_MAXACK_SET 0x20 44 45 /* Marks possibility for expected RFC5961 challenge ACK */ 46 #define IP_CT_EXP_CHALLENGE_ACK 0x40 47 48 struct nf_ct_tcp_flags { 49 __u8 flags; 50 __u8 mask; 51 }; 52 53 54 #endif /* _UAPI_NF_CONNTRACK_TCP_H */ 55