tools/testing/selftests/bpf/cgroup_tcp_skb.h

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