1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright (c) 2023 Meta Platforms, Inc. and 2 /* Copyright (c) 2023 Meta Platforms, Inc. and affiliates. */
3 3
4 /* Define states of a socket to tracking messa 4 /* Define states of a socket to tracking messages sending to and from the
5 * socket. 5 * socket.
6 * 6 *
7 * These states are based on rfc9293 with some 7 * These states are based on rfc9293 with some modifications to support
8 * tracking of messages sent out from a socket 8 * tracking of messages sent out from a socket. For example, when a SYN is
9 * received, a new socket is transiting to the 9 * received, a new socket is transiting to the SYN_RECV state defined in
10 * rfc9293. But, we put it in SYN_RECV_SENDING 10 * rfc9293. But, we put it in SYN_RECV_SENDING_SYN_ACK state and when
11 * SYN-ACK is sent out, it moves to SYN_RECV s 11 * SYN-ACK is sent out, it moves to SYN_RECV state. With this modification,
12 * we can track the message sent out from a so 12 * we can track the message sent out from a socket.
13 */ 13 */
14 14
15 #ifndef __CGROUP_TCP_SKB_H__ 15 #ifndef __CGROUP_TCP_SKB_H__
16 #define __CGROUP_TCP_SKB_H__ 16 #define __CGROUP_TCP_SKB_H__
17 17
18 enum { 18 enum {
19 INIT, 19 INIT,
20 CLOSED, 20 CLOSED,
21 SYN_SENT, 21 SYN_SENT,
22 SYN_RECV_SENDING_SYN_ACK, 22 SYN_RECV_SENDING_SYN_ACK,
23 SYN_RECV, 23 SYN_RECV,
24 ESTABLISHED, 24 ESTABLISHED,
25 FIN_WAIT1, 25 FIN_WAIT1,
26 FIN_WAIT2, 26 FIN_WAIT2,
27 CLOSE_WAIT_SENDING_ACK, 27 CLOSE_WAIT_SENDING_ACK,
28 CLOSE_WAIT, 28 CLOSE_WAIT,
29 CLOSING, 29 CLOSING,
30 LAST_ACK, 30 LAST_ACK,
31 TIME_WAIT_SENDING_ACK, 31 TIME_WAIT_SENDING_ACK,
32 TIME_WAIT, 32 TIME_WAIT,
33 }; 33 };
34 34
35 #endif /* __CGROUP_TCP_SKB_H__ */ 35 #endif /* __CGROUP_TCP_SKB_H__ */
36 36
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