162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */
262306a36Sopenharmony_ci/* Copyright (c) 2023 Meta Platforms, Inc. and affiliates. */
362306a36Sopenharmony_ci
462306a36Sopenharmony_ci/* Define states of a socket to tracking messages sending to and from the
562306a36Sopenharmony_ci * socket.
662306a36Sopenharmony_ci *
762306a36Sopenharmony_ci * These states are based on rfc9293 with some modifications to support
862306a36Sopenharmony_ci * tracking of messages sent out from a socket. For example, when a SYN is
962306a36Sopenharmony_ci * received, a new socket is transiting to the SYN_RECV state defined in
1062306a36Sopenharmony_ci * rfc9293. But, we put it in SYN_RECV_SENDING_SYN_ACK state and when
1162306a36Sopenharmony_ci * SYN-ACK is sent out, it moves to SYN_RECV state. With this modification,
1262306a36Sopenharmony_ci * we can track the message sent out from a socket.
1362306a36Sopenharmony_ci */
1462306a36Sopenharmony_ci
1562306a36Sopenharmony_ci#ifndef __CGROUP_TCP_SKB_H__
1662306a36Sopenharmony_ci#define __CGROUP_TCP_SKB_H__
1762306a36Sopenharmony_ci
1862306a36Sopenharmony_cienum {
1962306a36Sopenharmony_ci	INIT,
2062306a36Sopenharmony_ci	CLOSED,
2162306a36Sopenharmony_ci	SYN_SENT,
2262306a36Sopenharmony_ci	SYN_RECV_SENDING_SYN_ACK,
2362306a36Sopenharmony_ci	SYN_RECV,
2462306a36Sopenharmony_ci	ESTABLISHED,
2562306a36Sopenharmony_ci	FIN_WAIT1,
2662306a36Sopenharmony_ci	FIN_WAIT2,
2762306a36Sopenharmony_ci	CLOSE_WAIT_SENDING_ACK,
2862306a36Sopenharmony_ci	CLOSE_WAIT,
2962306a36Sopenharmony_ci	CLOSING,
3062306a36Sopenharmony_ci	LAST_ACK,
3162306a36Sopenharmony_ci	TIME_WAIT_SENDING_ACK,
3262306a36Sopenharmony_ci	TIME_WAIT,
3362306a36Sopenharmony_ci};
3462306a36Sopenharmony_ci
3562306a36Sopenharmony_ci#endif /* __CGROUP_TCP_SKB_H__ */
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