projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 9fb9cbb1 YK |
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 0x03 | |
| 29 | ||
| 30 | #ifdef __KERNEL__ | |
| 31 | ||
| 32 | struct ip_ct_tcp_state { | |
| 33 | u_int32_t td_end; /* max of seq + len */ | |
| 34 | u_int32_t td_maxend; /* max of ack + max(win, 1) */ | |
| 35 | u_int32_t td_maxwin; /* max(win) */ | |
| 36 | u_int8_t td_scale; /* window scale factor */ | |
| 37 | u_int8_t loose; /* used when connection picked up from the middle */ | |
| 38 | u_int8_t flags; /* per direction options */ | |
| 39 | }; | |
| 40 | ||
| 41 | struct ip_ct_tcp | |
| 42 | { | |
| 43 | struct ip_ct_tcp_state seen[2]; /* connection parameters per direction */ | |
| 44 | u_int8_t state; /* state of the connection (enum tcp_conntrack) */ | |
| 45 | /* For detecting stale connections */ | |
| 46 | u_int8_t last_dir; /* Direction of the last packet (enum ip_conntrack_dir) */ | |
| 47 | u_int8_t retrans; /* Number of retransmitted packets */ | |
| 48 | u_int8_t last_index; /* Index of the last packet */ | |
| 49 | u_int32_t last_seq; /* Last sequence number seen in dir */ | |
| 50 | u_int32_t last_ack; /* Last sequence number seen in opposite dir */ | |
| 51 | u_int32_t last_end; /* Last seq + len */ | |
| 52 | }; | |
| 53 | ||
| 54 | #endif /* __KERNEL__ */ | |
| 55 | ||
| 56 | #endif /* _NF_CONNTRACK_TCP_H */ |