xref: /linux/include/net/tcp_states.h (revision 06d07429858317ded2db7986113a9e0129cd599b)
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 
12 enum {
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 
34 enum {
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