LXR linux/include/uapi/linux/netfilter/nf_conntrack

   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) */
   8enum 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
  45struct nf_ct_tcp_flags {
  46        __u8 flags;
  47        __u8 mask;
  48};
  49
  50
  51#endif /* _UAPI_NF_CONNTRACK_TCP_H */
  52