include/uapi/linux/netfilter/nf_conntrack_tcp.h

   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 struct nf_ct_tcp_flags {
  46         __u8 flags;
  47         __u8 mask;
  48 };
  49
  50
  51 #endif /* _UAPI_NF_CONNTRACK_TCP_H */