| #ifndef _NF_CONNTRACK_TCP_H |
| #define _NF_CONNTRACK_TCP_H |
| /* TCP tracking. */ |
| |
| /* 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, |
| TCP_CONNTRACK_MAX, |
| TCP_CONNTRACK_IGNORE |
| }; |
| |
| /* 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 |
| |
| struct nf_ct_tcp_flags { |
| u_int8_t flags; |
| u_int8_t mask; |
| }; |
| |
| |
| #endif /* _NF_CONNTRACK_TCP_H */ |
