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      1 /*
      2  * DTLS implementation written by Nagendra Modadugu
      3  * (nagendra (at) cs.stanford.edu) for the OpenSSL project 2005.
      4  */
      5 /* ====================================================================
      6  * Copyright (c) 1999-2005 The OpenSSL Project.  All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  *
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  *
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in
     17  *    the documentation and/or other materials provided with the
     18  *    distribution.
     19  *
     20  * 3. All advertising materials mentioning features or use of this
     21  *    software must display the following acknowledgment:
     22  *    "This product includes software developed by the OpenSSL Project
     23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
     24  *
     25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
     26  *    endorse or promote products derived from this software without
     27  *    prior written permission. For written permission, please contact
     28  *    openssl-core (at) OpenSSL.org.
     29  *
     30  * 5. Products derived from this software may not be called "OpenSSL"
     31  *    nor may "OpenSSL" appear in their names without prior written
     32  *    permission of the OpenSSL Project.
     33  *
     34  * 6. Redistributions of any form whatsoever must retain the following
     35  *    acknowledgment:
     36  *    "This product includes software developed by the OpenSSL Project
     37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
     38  *
     39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
     40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
     43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
     50  * OF THE POSSIBILITY OF SUCH DAMAGE.
     51  * ====================================================================
     52  *
     53  * This product includes cryptographic software written by Eric Young
     54  * (eay (at) cryptsoft.com).  This product includes software written by Tim
     55  * Hudson (tjh (at) cryptsoft.com). */
     56 
     57 #include <openssl/ssl.h>
     58 
     59 #include "internal.h"
     60 
     61 
     62 static const SSL_PROTOCOL_METHOD DTLS_protocol_method = {
     63     1 /* is_dtls */,
     64     dtls1_new,
     65     dtls1_free,
     66     dtls1_accept,
     67     dtls1_connect,
     68     dtls1_get_message,
     69     dtls1_read_app_data,
     70     dtls1_read_change_cipher_spec,
     71     dtls1_read_close_notify,
     72     dtls1_write_app_data,
     73     dtls1_dispatch_alert,
     74     dtls1_supports_cipher,
     75     DTLS1_HM_HEADER_LENGTH,
     76     dtls1_set_handshake_header,
     77     dtls1_handshake_write,
     78 };
     79 
     80 const SSL_METHOD *DTLS_method(void) {
     81   static const SSL_METHOD method = {
     82       0,
     83       &DTLS_protocol_method,
     84   };
     85   return &method;
     86 }
     87 
     88 /* Legacy version-locked methods. */
     89 
     90 const SSL_METHOD *DTLSv1_2_method(void) {
     91   static const SSL_METHOD method = {
     92       DTLS1_2_VERSION,
     93       &DTLS_protocol_method,
     94   };
     95   return &method;
     96 }
     97 
     98 const SSL_METHOD *DTLSv1_method(void) {
     99   static const SSL_METHOD method = {
    100       DTLS1_VERSION,
    101       &DTLS_protocol_method,
    102   };
    103   return &method;
    104 }
    105 
    106 /* Legacy side-specific methods. */
    107 
    108 const SSL_METHOD *DTLSv1_2_server_method(void) {
    109   return DTLSv1_2_method();
    110 }
    111 
    112 const SSL_METHOD *DTLSv1_server_method(void) {
    113   return DTLSv1_method();
    114 }
    115 
    116 const SSL_METHOD *DTLSv1_2_client_method(void) {
    117   return DTLSv1_2_method();
    118 }
    119 
    120 const SSL_METHOD *DTLSv1_client_method(void) {
    121   return DTLSv1_method();
    122 }
    123 
    124 const SSL_METHOD *DTLS_server_method(void) {
    125   return DTLS_method();
    126 }
    127 
    128 const SSL_METHOD *DTLS_client_method(void) {
    129   return DTLS_method();
    130 }
    131