1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _UAPI_NF_CONNTRACK_TCP_H
3 #define _UAPI_NF_CONNTRACK_TCP_H
6 #include <linux/types.h>
8 /* This is exposed to userspace (ctnetlink) */
11 TCP_CONNTRACK_SYN_SENT,
12 TCP_CONNTRACK_SYN_RECV,
13 TCP_CONNTRACK_ESTABLISHED,
14 TCP_CONNTRACK_FIN_WAIT,
15 TCP_CONNTRACK_CLOSE_WAIT,
16 TCP_CONNTRACK_LAST_ACK,
17 TCP_CONNTRACK_TIME_WAIT,
19 TCP_CONNTRACK_LISTEN, /* obsolete */
20 #define TCP_CONNTRACK_SYN_SENT2 TCP_CONNTRACK_LISTEN
23 TCP_CONNTRACK_RETRANS,
25 TCP_CONNTRACK_TIMEOUT_MAX
28 /* Window scaling is advertised by the sender */
29 #define IP_CT_TCP_FLAG_WINDOW_SCALE 0x01
31 /* SACK is permitted by the sender */
32 #define IP_CT_TCP_FLAG_SACK_PERM 0x02
34 /* This sender sent FIN first */
35 #define IP_CT_TCP_FLAG_CLOSE_INIT 0x04
37 /* Be liberal in window checking */
38 #define IP_CT_TCP_FLAG_BE_LIBERAL 0x08
40 /* Has unacknowledged data */
41 #define IP_CT_TCP_FLAG_DATA_UNACKNOWLEDGED 0x10
43 /* The field td_maxack has been set */
44 #define IP_CT_TCP_FLAG_MAXACK_SET 0x20
46 /* Marks possibility for expected RFC5961 challenge ACK */
47 #define IP_CT_EXP_CHALLENGE_ACK 0x40
49 /* Simultaneous open initialized */
50 #define IP_CT_TCP_SIMULTANEOUS_OPEN 0x80
52 struct nf_ct_tcp_flags {
58 #endif /* _UAPI_NF_CONNTRACK_TCP_H */