1 /* $OpenBSD: dtls1.h,v 1.27 2021/05/16 13:56:30 jsing Exp $ */ 2 /* 3 * DTLS implementation written by Nagendra Modadugu 4 * (nagendra@cs.stanford.edu) for the OpenSSL project 2005. 5 */ 6 /* ==================================================================== 7 * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. All advertising materials mentioning features or use of this 22 * software must display the following acknowledgment: 23 * "This product includes software developed by the OpenSSL Project 24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 25 * 26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 27 * endorse or promote products derived from this software without 28 * prior written permission. For written permission, please contact 29 * openssl-core@OpenSSL.org. 30 * 31 * 5. Products derived from this software may not be called "OpenSSL" 32 * nor may "OpenSSL" appear in their names without prior written 33 * permission of the OpenSSL Project. 34 * 35 * 6. Redistributions of any form whatsoever must retain the following 36 * acknowledgment: 37 * "This product includes software developed by the OpenSSL Project 38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 51 * OF THE POSSIBILITY OF SUCH DAMAGE. 52 * ==================================================================== 53 * 54 * This product includes cryptographic software written by Eric Young 55 * (eay@cryptsoft.com). This product includes software written by Tim 56 * Hudson (tjh@cryptsoft.com). 57 * 58 */ 59 60 #ifndef HEADER_DTLS1_H 61 #define HEADER_DTLS1_H 62 63 #if defined(_WIN32) 64 #include <winsock2.h> 65 #else 66 #include <sys/time.h> 67 #endif 68 69 #include <stdio.h> 70 #include <stdlib.h> 71 #include <string.h> 72 73 #include <openssl/opensslconf.h> 74 #include <openssl/buffer.h> 75 76 #ifdef __cplusplus 77 extern "C" { 78 #endif 79 80 #define DTLS1_VERSION 0xFEFF 81 #define DTLS1_2_VERSION 0xFEFD 82 #define DTLS1_VERSION_MAJOR 0xFE 83 84 /* lengths of messages */ 85 #define DTLS1_COOKIE_LENGTH 256 86 87 #define DTLS1_RT_HEADER_LENGTH 13 88 89 #define DTLS1_HM_HEADER_LENGTH 12 90 91 #define DTLS1_HM_BAD_FRAGMENT -2 92 #define DTLS1_HM_FRAGMENT_RETRY -3 93 94 #define DTLS1_CCS_HEADER_LENGTH 1 95 96 #define DTLS1_AL_HEADER_LENGTH 2 97 98 /* Timeout multipliers (timeout slice is defined in apps/timeouts.h */ 99 #define DTLS1_TMO_READ_COUNT 2 100 #define DTLS1_TMO_WRITE_COUNT 2 101 102 #define DTLS1_TMO_ALERT_COUNT 12 103 104 #ifdef __cplusplus 105 } 106 #endif 107 #endif 108