![Patrick McHardy](/assets/img/avatar_default.png)
IP_CT_TCP_FLAG_CLOSE_INIT is a flag and should have a value of 0x4 instead of 0x3, which is IP_CT_TCP_FLAG_WINDOW_SCALE | IP_CT_TCP_FLAG_SACK_PERM. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
#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
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
struct ip_ct_tcp_state {
|
|
u_int32_t td_end; /* max of seq + len */
|
|
u_int32_t td_maxend; /* max of ack + max(win, 1) */
|
|
u_int32_t td_maxwin; /* max(win) */
|
|
u_int8_t td_scale; /* window scale factor */
|
|
u_int8_t loose; /* used when connection picked up from the middle */
|
|
u_int8_t flags; /* per direction options */
|
|
};
|
|
|
|
struct ip_ct_tcp
|
|
{
|
|
struct ip_ct_tcp_state seen[2]; /* connection parameters per direction */
|
|
u_int8_t state; /* state of the connection (enum tcp_conntrack) */
|
|
/* For detecting stale connections */
|
|
u_int8_t last_dir; /* Direction of the last packet (enum ip_conntrack_dir) */
|
|
u_int8_t retrans; /* Number of retransmitted packets */
|
|
u_int8_t last_index; /* Index of the last packet */
|
|
u_int32_t last_seq; /* Last sequence number seen in dir */
|
|
u_int32_t last_ack; /* Last sequence number seen in opposite dir */
|
|
u_int32_t last_end; /* Last seq + len */
|
|
u_int16_t last_win; /* Last window advertisement seen in dir */
|
|
};
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _NF_CONNTRACK_TCP_H */
|