2 * Copyright 2005-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (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 OPENSSL_DTLS1_H
11 # define OPENSSL_DTLS1_H
14 # include <openssl/macros.h>
15 # ifndef OPENSSL_NO_DEPRECATED_3_0
16 # define HEADER_DTLS1_H
23 #include <openssl/opensslconf.h>
25 # define DTLS1_VERSION 0xFEFF
26 # define DTLS1_2_VERSION 0xFEFD
27 # ifndef OPENSSL_NO_DEPRECATED_3_0
28 # define DTLS_MIN_VERSION DTLS1_VERSION
29 # define DTLS_MAX_VERSION DTLS1_2_VERSION
31 # define DTLS1_VERSION_MAJOR 0xFE
33 # define DTLS1_BAD_VER 0x0100
35 /* Special value for method supporting multiple versions */
36 # define DTLS_ANY_VERSION 0x1FFFF
38 /* lengths of messages */
40 * Actually the max cookie length in DTLS is 255. But we can't change this now
41 * due to compatibility concerns.
43 # define DTLS1_COOKIE_LENGTH 256
45 # define DTLS1_RT_HEADER_LENGTH 13
47 # define DTLS1_HM_HEADER_LENGTH 12
49 # define DTLS1_HM_BAD_FRAGMENT -2
50 # define DTLS1_HM_FRAGMENT_RETRY -3
52 # define DTLS1_CCS_HEADER_LENGTH 1
54 # define DTLS1_AL_HEADER_LENGTH 2
56 /* Timeout multipliers */
57 # define DTLS1_TMO_READ_COUNT 2
58 # define DTLS1_TMO_WRITE_COUNT 2
60 # define DTLS1_TMO_ALERT_COUNT 12