1 /* 2 * Copyright 2005-2018 The OpenSSL Project Authors. All Rights Reserved. 3 * 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 8 */ 9 10 #ifndef HEADER_DTLS1_H 11 # define HEADER_DTLS1_H 12 13 #ifdef __cplusplus 14 extern "C" { 15 #endif 16 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 22 23 # define DTLS1_BAD_VER 0x0100 24 25 /* Special value for method supporting multiple versions */ 26 # define DTLS_ANY_VERSION 0x1FFFF 27 28 /* lengths of messages */ 29 /* 30 * Actually the max cookie length in DTLS is 255. But we can't change this now 31 * due to compatibility concerns. 32 */ 33 # define DTLS1_COOKIE_LENGTH 256 34 35 # define DTLS1_RT_HEADER_LENGTH 13 36 37 # define DTLS1_HM_HEADER_LENGTH 12 38 39 # define DTLS1_HM_BAD_FRAGMENT -2 40 # define DTLS1_HM_FRAGMENT_RETRY -3 41 42 # define DTLS1_CCS_HEADER_LENGTH 1 43 44 # define DTLS1_AL_HEADER_LENGTH 2 45 46 /* Timeout multipliers */ 47 # define DTLS1_TMO_READ_COUNT 2 48 # define DTLS1_TMO_WRITE_COUNT 2 49 50 # define DTLS1_TMO_ALERT_COUNT 12 51 52 #ifdef __cplusplus 53 } 54 #endif 55 #endif 56