text: /*
   * Copyright 2005-2018 The OpenSSL Project Authors. All Rights Reserved.
   *
   * Licensed under the OpenSSL license (the "License").  You may not use
   * this file except in compliance with the License.  You can obtain a copy
   * in the file LICENSE in the source distribution or at
   * https://www.openssl.org/source/license.html
   */
  
  #ifndef HEADER_DTLS1_H
  # define HEADER_DTLS1_H
  
  #ifdef  __cplusplus
  extern "C" {
  #endif
  
  # define DTLS1_VERSION                   0xFEFF
  # define DTLS1_2_VERSION                 0xFEFD
  # define DTLS_MIN_VERSION                DTLS1_VERSION
  # define DTLS_MAX_VERSION                DTLS1_2_VERSION
  # define DTLS1_VERSION_MAJOR             0xFE
  
  # define DTLS1_BAD_VER                   0x0100
  
  /* Special value for method supporting multiple versions */
  # define DTLS_ANY_VERSION                0x1FFFF
  
  /* lengths of messages */
  /*
   * Actually the max cookie length in DTLS is 255. But we can't change this now
   * due to compatibility concerns.
   */
  # define DTLS1_COOKIE_LENGTH                     256
  
  # define DTLS1_RT_HEADER_LENGTH                  13
  
  # define DTLS1_HM_HEADER_LENGTH                  12
  
  # define DTLS1_HM_BAD_FRAGMENT                   -2
  # define DTLS1_HM_FRAGMENT_RETRY                 -3
  
  # define DTLS1_CCS_HEADER_LENGTH                  1
  
  # define DTLS1_AL_HEADER_LENGTH                   2
  
  /* Timeout multipliers */
  # define DTLS1_TMO_READ_COUNT                      2
  # define DTLS1_TMO_WRITE_COUNT                     2
  
  # define DTLS1_TMO_ALERT_COUNT                     12
  
  #ifdef  __cplusplus
  }
  #endif
  #endif
  