2 * Copyright 2005-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 #ifndef HEADER_DTLS1_H
11 # define HEADER_DTLS1_H
17 # define DTLS1_VERSION 0xFEFF
18 # define DTLS1_2_VERSION 0xFEFD
19 # define DTLS_MIN_VERSION DTLS1_VERSION
20 # define DTLS_MAX_VERSION DTLS1_2_VERSION
21 # define DTLS1_VERSION_MAJOR 0xFE
23 # define DTLS1_BAD_VER 0x0100
25 /* Special value for method supporting multiple versions */
26 # define DTLS_ANY_VERSION 0x1FFFF
28 /* lengths of messages */
30 * Actually the max cookie length in DTLS is 255. But we can't change this now
31 * due to compatibility concerns.
33 # define DTLS1_COOKIE_LENGTH 256
35 # define DTLS1_RT_HEADER_LENGTH 13
37 # define DTLS1_HM_HEADER_LENGTH 12
39 # define DTLS1_HM_BAD_FRAGMENT -2
40 # define DTLS1_HM_FRAGMENT_RETRY -3
42 # define DTLS1_CCS_HEADER_LENGTH 1
44 # define DTLS1_AL_HEADER_LENGTH 2
46 /* Timeout multipliers (timeout slice is defined in apps/timeouts.h */
47 # define DTLS1_TMO_READ_COUNT 2
48 # define DTLS1_TMO_WRITE_COUNT 2
50 # define DTLS1_TMO_ALERT_COUNT 12