include/net/tcp_states.h

   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 */