include/linux/netfilter_ipv4/ip_conntrack_tcp.h

   1 #ifndef _IP_CONNTRACK_TCP_H
   2 #define _IP_CONNTRACK_TCP_H
   3 /* TCP tracking. */
   4
   5 enum tcp_conntrack {
   6         TCP_CONNTRACK_NONE,
   7         TCP_CONNTRACK_ESTABLISHED,
   8         TCP_CONNTRACK_SYN_SENT,
   9         TCP_CONNTRACK_SYN_RECV,
  10         TCP_CONNTRACK_FIN_WAIT,
  11         TCP_CONNTRACK_TIME_WAIT,
  12         TCP_CONNTRACK_CLOSE,
  13         TCP_CONNTRACK_CLOSE_WAIT,
  14         TCP_CONNTRACK_LAST_ACK,
  15         TCP_CONNTRACK_LISTEN,
  16         TCP_CONNTRACK_MAX
  17 };
  18
  19 struct ip_ct_tcp
  20 {
  21         enum tcp_conntrack state;
  22
  23         /* Poor man's window tracking: sequence number of valid ACK
  24            handshake completion packet */
  25         u_int32_t handshake_ack;
  26 };
  27
  28 #endif /* _IP_CONNTRACK_TCP_H */