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191 lines
5.5 KiB
C
Executable File
191 lines
5.5 KiB
C
Executable File
/* $OpenBSD: dtls1.h,v 1.23 2020/03/12 17:01:53 jsing Exp $ */
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/*
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* DTLS implementation written by Nagendra Modadugu
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* (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
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*/
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/* ====================================================================
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* Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#ifndef HEADER_DTLS1_H
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#define HEADER_DTLS1_H
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#if defined(_WIN32)
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#include <winsock2.h>
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#else
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#include <sys/time.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <openssl/opensslconf.h>
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#include <openssl/buffer.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define DTLS1_VERSION 0xFEFF
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/* lengths of messages */
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#define DTLS1_COOKIE_LENGTH 256
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#define DTLS1_RT_HEADER_LENGTH 13
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#define DTLS1_HM_HEADER_LENGTH 12
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#define DTLS1_HM_BAD_FRAGMENT -2
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#define DTLS1_HM_FRAGMENT_RETRY -3
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#define DTLS1_CCS_HEADER_LENGTH 1
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#define DTLS1_AL_HEADER_LENGTH 2
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#ifndef OPENSSL_NO_SSL_INTERN
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typedef struct dtls1_bitmap_st {
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unsigned long map; /* track 32 packets on 32-bit systems
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and 64 - on 64-bit systems */
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unsigned char max_seq_num[8]; /* max record number seen so far,
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64-bit value in big-endian
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encoding */
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} DTLS1_BITMAP;
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struct dtls1_retransmit_state {
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EVP_CIPHER_CTX *enc_write_ctx; /* cryptographic state */
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EVP_MD_CTX *write_hash; /* used for mac generation */
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SSL_SESSION *session;
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unsigned short epoch;
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};
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struct hm_header_st {
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unsigned char type;
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unsigned long msg_len;
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unsigned short seq;
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unsigned long frag_off;
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unsigned long frag_len;
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unsigned int is_ccs;
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struct dtls1_retransmit_state saved_retransmit_state;
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};
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struct ccs_header_st {
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unsigned char type;
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unsigned short seq;
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};
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struct dtls1_timeout_st {
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/* Number of read timeouts so far */
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unsigned int read_timeouts;
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/* Number of write timeouts so far */
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unsigned int write_timeouts;
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/* Number of alerts received so far */
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unsigned int num_alerts;
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};
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struct _pqueue;
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typedef struct record_pqueue_st {
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unsigned short epoch;
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struct _pqueue *q;
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} record_pqueue;
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typedef struct hm_fragment_st {
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struct hm_header_st msg_header;
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unsigned char *fragment;
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unsigned char *reassembly;
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} hm_fragment;
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struct dtls1_state_internal_st;
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typedef struct dtls1_state_st {
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/* Buffered (sent) handshake records */
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struct _pqueue *sent_messages;
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/* Indicates when the last handshake msg or heartbeat sent will timeout */
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struct timeval next_timeout;
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/* Timeout duration */
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unsigned short timeout_duration;
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struct dtls1_state_internal_st *internal;
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} DTLS1_STATE;
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#ifndef LIBRESSL_INTERNAL
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typedef struct dtls1_record_data_st {
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unsigned char *packet;
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unsigned int packet_length;
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SSL3_BUFFER rbuf;
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SSL3_RECORD rrec;
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} DTLS1_RECORD_DATA;
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#endif
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#endif
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/* Timeout multipliers (timeout slice is defined in apps/timeouts.h */
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#define DTLS1_TMO_READ_COUNT 2
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#define DTLS1_TMO_WRITE_COUNT 2
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#define DTLS1_TMO_ALERT_COUNT 12
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#ifdef __cplusplus
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}
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#endif
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#endif
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