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6f52b16c | 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
94d0ec58 DH |
2 | #ifndef _UAPI_NF_CONNTRACK_TCP_H |
3 | #define _UAPI_NF_CONNTRACK_TCP_H | |
4 | /* TCP tracking. */ | |
5 | ||
6 | #include <linux/types.h> | |
7 | ||
8 | /* This is exposed to userspace (ctnetlink) */ | |
9 | enum tcp_conntrack { | |
10 | TCP_CONNTRACK_NONE, | |
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, | |
18 | TCP_CONNTRACK_CLOSE, | |
19 | TCP_CONNTRACK_LISTEN, /* obsolete */ | |
20 | #define TCP_CONNTRACK_SYN_SENT2 TCP_CONNTRACK_LISTEN | |
21 | TCP_CONNTRACK_MAX, | |
22 | TCP_CONNTRACK_IGNORE, | |
23 | TCP_CONNTRACK_RETRANS, | |
24 | TCP_CONNTRACK_UNACK, | |
25 | TCP_CONNTRACK_TIMEOUT_MAX | |
26 | }; | |
27 | ||
28 | /* Window scaling is advertised by the sender */ | |
29 | #define IP_CT_TCP_FLAG_WINDOW_SCALE 0x01 | |
30 | ||
31 | /* SACK is permitted by the sender */ | |
32 | #define IP_CT_TCP_FLAG_SACK_PERM 0x02 | |
33 | ||
34 | /* This sender sent FIN first */ | |
35 | #define IP_CT_TCP_FLAG_CLOSE_INIT 0x04 | |
36 | ||
37 | /* Be liberal in window checking */ | |
38 | #define IP_CT_TCP_FLAG_BE_LIBERAL 0x08 | |
39 | ||
40 | /* Has unacknowledged data */ | |
41 | #define IP_CT_TCP_FLAG_DATA_UNACKNOWLEDGED 0x10 | |
42 | ||
43 | /* The field td_maxack has been set */ | |
44 | #define IP_CT_TCP_FLAG_MAXACK_SET 0x20 | |
45 | ||
b3cad287 JDB |
46 | /* Marks possibility for expected RFC5961 challenge ACK */ |
47 | #define IP_CT_EXP_CHALLENGE_ACK 0x40 | |
48 | ||
94d0ec58 DH |
49 | struct nf_ct_tcp_flags { |
50 | __u8 flags; | |
51 | __u8 mask; | |
52 | }; | |
53 | ||
54 | ||
55 | #endif /* _UAPI_NF_CONNTRACK_TCP_H */ |