| #ifndef _NF_CONNTRACK_TCP_H |
| #define _NF_CONNTRACK_TCP_H |
| /* TCP tracking. */ |
| |
| #include <linux/types.h> |
| |
| /* This is exposed to userspace (ctnetlink) */ |
| enum tcp_conntrack { |
| TCP_CONNTRACK_NONE, |
| TCP_CONNTRACK_SYN_SENT, |
| TCP_CONNTRACK_SYN_RECV, |
| TCP_CONNTRACK_ESTABLISHED, |
| TCP_CONNTRACK_FIN_WAIT, |
| TCP_CONNTRACK_CLOSE_WAIT, |
| TCP_CONNTRACK_LAST_ACK, |
| TCP_CONNTRACK_TIME_WAIT, |
| TCP_CONNTRACK_CLOSE, |
| TCP_CONNTRACK_LISTEN, /* obsolete */ |
| #define TCP_CONNTRACK_SYN_SENT2 TCP_CONNTRACK_LISTEN |
| TCP_CONNTRACK_MAX, |
| TCP_CONNTRACK_IGNORE, |
| TCP_CONNTRACK_RETRANS, |
| TCP_CONNTRACK_UNACK, |
| TCP_CONNTRACK_TIMEOUT_MAX |
| }; |
| |
| /* Window scaling is advertised by the sender */ |
| #define IP_CT_TCP_FLAG_WINDOW_SCALE 0x01 |
| |
| /* SACK is permitted by the sender */ |
| #define IP_CT_TCP_FLAG_SACK_PERM 0x02 |
| |
| /* This sender sent FIN first */ |
| #define IP_CT_TCP_FLAG_CLOSE_INIT 0x04 |
| |
| /* Be liberal in window checking */ |
| #define IP_CT_TCP_FLAG_BE_LIBERAL 0x08 |
| |
| /* Has unacknowledged data */ |
| #define IP_CT_TCP_FLAG_DATA_UNACKNOWLEDGED 0x10 |
| |
| /* The field td_maxack has been set */ |
| #define IP_CT_TCP_FLAG_MAXACK_SET 0x20 |
| |
| /* Marks possibility for expected RFC5961 challenge ACK */ |
| #define IP_CT_EXP_CHALLENGE_ACK 0x40 |
| |
| struct nf_ct_tcp_flags { |
| __u8 flags; |
| __u8 mask; |
| }; |
| |
| |
| #endif /* _NF_CONNTRACK_TCP_H */ |
