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Linux/include/net/tcp_states.h

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  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 
 26         TCP_MAX_STATES  /* Leave at the end! */
 27 };
 28 
 29 #define TCP_STATE_MASK  0xF
 30 
 31 #define TCP_ACTION_FIN  (1 << TCP_CLOSE)
 32 
 33 enum {
 34         TCPF_ESTABLISHED = (1 << TCP_ESTABLISHED),
 35         TCPF_SYN_SENT    = (1 << TCP_SYN_SENT),
 36         TCPF_SYN_RECV    = (1 << TCP_SYN_RECV),
 37         TCPF_FIN_WAIT1   = (1 << TCP_FIN_WAIT1),
 38         TCPF_FIN_WAIT2   = (1 << TCP_FIN_WAIT2),
 39         TCPF_TIME_WAIT   = (1 << TCP_TIME_WAIT),
 40         TCPF_CLOSE       = (1 << TCP_CLOSE),
 41         TCPF_CLOSE_WAIT  = (1 << TCP_CLOSE_WAIT),
 42         TCPF_LAST_ACK    = (1 << TCP_LAST_ACK),
 43         TCPF_LISTEN      = (1 << TCP_LISTEN),
 44         TCPF_CLOSING     = (1 << TCP_CLOSING),
 45         TCPF_NEW_SYN_RECV = (1 << TCP_NEW_SYN_RECV),
 46 };
 47 
 48 #endif  /* _LINUX_TCP_STATES_H */
 49 

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