1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
6 *
7 * Definitions for the TCP protocol sk_state field.
8 */
9#ifndef _LINUX_TCP_STATES_H
10#define _LINUX_TCP_STATES_H
11
12enum {
13 TCP_ESTABLISHED = 1,
14 TCP_SYN_SENT,
15 TCP_SYN_RECV,
16 TCP_FIN_WAIT1,
17 TCP_FIN_WAIT2,
18 TCP_TIME_WAIT,
19 TCP_CLOSE,
20 TCP_CLOSE_WAIT,
21 TCP_LAST_ACK,
22 TCP_LISTEN,
23 TCP_CLOSING, /* Now a valid state */
24 TCP_NEW_SYN_RECV,
25 TCP_BOUND_INACTIVE, /* Pseudo-state for inet_diag */
26
27 TCP_MAX_STATES /* Leave at the end! */
28};
29
30#define TCP_STATE_MASK 0xF
31
32#define TCP_ACTION_FIN (1 << TCP_CLOSE)
33
34enum {
35 TCPF_ESTABLISHED = (1 << TCP_ESTABLISHED),
36 TCPF_SYN_SENT = (1 << TCP_SYN_SENT),
37 TCPF_SYN_RECV = (1 << TCP_SYN_RECV),
38 TCPF_FIN_WAIT1 = (1 << TCP_FIN_WAIT1),
39 TCPF_FIN_WAIT2 = (1 << TCP_FIN_WAIT2),
40 TCPF_TIME_WAIT = (1 << TCP_TIME_WAIT),
41 TCPF_CLOSE = (1 << TCP_CLOSE),
42 TCPF_CLOSE_WAIT = (1 << TCP_CLOSE_WAIT),
43 TCPF_LAST_ACK = (1 << TCP_LAST_ACK),
44 TCPF_LISTEN = (1 << TCP_LISTEN),
45 TCPF_CLOSING = (1 << TCP_CLOSING),
46 TCPF_NEW_SYN_RECV = (1 << TCP_NEW_SYN_RECV),
47 TCPF_BOUND_INACTIVE = (1 << TCP_BOUND_INACTIVE),
48};
49
50#endif /* _LINUX_TCP_STATES_H */
51