3 * DTLS implementation written by Nagendra Modadugu
4 * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
6 /* ====================================================================
7 * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
60 #ifndef HEADER_DTLS1_H
61 # define HEADER_DTLS1_H
67 # define DTLS1_VERSION 0xFEFF
68 # define DTLS1_2_VERSION 0xFEFD
69 # define DTLS_MAX_VERSION DTLS1_2_VERSION
70 # define DTLS1_VERSION_MAJOR 0xFE
72 # define DTLS1_BAD_VER 0x0100
74 /* Special value for method supporting multiple versions */
75 # define DTLS_ANY_VERSION 0x1FFFF
77 /* lengths of messages */
78 # define DTLS1_COOKIE_LENGTH 256
80 # define DTLS1_RT_HEADER_LENGTH 13
82 # define DTLS1_HM_HEADER_LENGTH 12
84 # define DTLS1_HM_BAD_FRAGMENT -2
85 # define DTLS1_HM_FRAGMENT_RETRY -3
87 # define DTLS1_CCS_HEADER_LENGTH 1
89 # ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
90 # define DTLS1_AL_HEADER_LENGTH 7
92 # define DTLS1_AL_HEADER_LENGTH 2
96 /* Timeout multipliers (timeout slice is defined in apps/timeouts.h */
97 # define DTLS1_TMO_READ_COUNT 2
98 # define DTLS1_TMO_WRITE_COUNT 2
100 # define DTLS1_TMO_ALERT_COUNT 12