LXR linux/include/net/tcp

   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
  12enum {
  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
  33enum {
  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