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diff --git a/libressl/include64/openssl/dtls1.h b/libressl/include64/openssl/dtls1.h
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+/* $OpenBSD: dtls1.h,v 1.22 2018/08/24 19:35:05 jsing Exp $ */
+/*
+ * DTLS implementation written by Nagendra Modadugu
+ * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
+ */
+/* ====================================================================
+ * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * openssl-core@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#ifndef HEADER_DTLS1_H
+#define HEADER_DTLS1_H
+
+#if defined(_WIN32)
+#include <winsock2.h>
+#else
+#include <sys/time.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <openssl/opensslconf.h>
+#include <openssl/buffer.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define DTLS1_VERSION 0xFEFF
+
+/* lengths of messages */
+#define DTLS1_COOKIE_LENGTH 256
+
+#define DTLS1_RT_HEADER_LENGTH 13
+
+#define DTLS1_HM_HEADER_LENGTH 12
+
+#define DTLS1_HM_BAD_FRAGMENT -2
+#define DTLS1_HM_FRAGMENT_RETRY -3
+
+#define DTLS1_CCS_HEADER_LENGTH 1
+
+#define DTLS1_AL_HEADER_LENGTH 2
+
+#ifndef OPENSSL_NO_SSL_INTERN
+
+
+typedef struct dtls1_bitmap_st {
+ unsigned long map; /* track 32 packets on 32-bit systems
+ and 64 - on 64-bit systems */
+ unsigned char max_seq_num[8]; /* max record number seen so far,
+ 64-bit value in big-endian
+ encoding */
+} DTLS1_BITMAP;
+
+struct dtls1_retransmit_state {
+ EVP_CIPHER_CTX *enc_write_ctx; /* cryptographic state */
+ EVP_MD_CTX *write_hash; /* used for mac generation */
+ SSL_SESSION *session;
+ unsigned short epoch;
+};
+
+struct hm_header_st {
+ unsigned char type;
+ unsigned long msg_len;
+ unsigned short seq;
+ unsigned long frag_off;
+ unsigned long frag_len;
+ unsigned int is_ccs;
+ struct dtls1_retransmit_state saved_retransmit_state;
+};
+
+struct ccs_header_st {
+ unsigned char type;
+ unsigned short seq;
+};
+
+struct dtls1_timeout_st {
+ /* Number of read timeouts so far */
+ unsigned int read_timeouts;
+
+ /* Number of write timeouts so far */
+ unsigned int write_timeouts;
+
+ /* Number of alerts received so far */
+ unsigned int num_alerts;
+};
+
+struct _pqueue;
+
+typedef struct record_pqueue_st {
+ unsigned short epoch;
+ struct _pqueue *q;
+} record_pqueue;
+
+typedef struct hm_fragment_st {
+ struct hm_header_st msg_header;
+ unsigned char *fragment;
+ unsigned char *reassembly;
+} hm_fragment;
+
+struct dtls1_state_internal_st;
+
+typedef struct dtls1_state_st {
+ /* Buffered (sent) handshake records */
+ struct _pqueue *sent_messages;
+
+ /* Indicates when the last handshake msg or heartbeat sent will timeout */
+ struct timeval next_timeout;
+
+ /* Timeout duration */
+ unsigned short timeout_duration;
+
+ struct dtls1_state_internal_st *internal;
+} DTLS1_STATE;
+
+typedef struct dtls1_record_data_st {
+ unsigned char *packet;
+ unsigned int packet_length;
+ SSL3_BUFFER rbuf;
+ SSL3_RECORD rrec;
+} DTLS1_RECORD_DATA;
+
+#endif
+
+/* Timeout multipliers (timeout slice is defined in apps/timeouts.h */
+#define DTLS1_TMO_READ_COUNT 2
+#define DTLS1_TMO_WRITE_COUNT 2
+
+#define DTLS1_TMO_ALERT_COUNT 12
+
+#ifdef __cplusplus
+}
+#endif
+#endif