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diff --git a/openssl/ssl/dtls1.h b/openssl/ssl/dtls1.h
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+/* ssl/dtls1.h */
+/*
+ * 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
+
+# include <openssl/buffer.h>
+# include <openssl/pqueue.h>
+# ifdef OPENSSL_SYS_VMS
+#  include <resource.h>
+#  include <sys/timeb.h>
+# endif
+# ifdef OPENSSL_SYS_WIN32
+/* Needed for struct timeval */
+#  include <winsock.h>
+# elif defined(OPENSSL_SYS_NETWARE) && !defined(_WINSOCK2API_)
+#  include <sys/timeval.h>
+# else
+#  if defined(OPENSSL_SYS_VXWORKS)
+#   include <sys/times.h>
+#  else
+#   include <sys/time.h>
+#  endif
+# endif
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+# define DTLS1_VERSION                   0xFEFF
+# define DTLS1_2_VERSION                 0xFEFD
+# define DTLS_MAX_VERSION                DTLS1_2_VERSION
+# define DTLS1_VERSION_MAJOR             0xFE
+
+# define DTLS1_BAD_VER                   0x0100
+
+/* Special value for method supporting multiple versions */
+# define DTLS_ANY_VERSION                0x1FFFF
+
+# if 0
+/* this alert description is not specified anywhere... */
+#  define DTLS1_AD_MISSING_HANDSHAKE_MESSAGE    110
+# endif
+
+/* 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
+
+# ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
+#  define DTLS1_AL_HEADER_LENGTH                   7
+# else
+#  define DTLS1_AL_HEADER_LENGTH                   2
+# endif
+
+# ifndef OPENSSL_NO_SSL_INTERN
+
+#  ifndef OPENSSL_NO_SCTP
+#   define DTLS1_SCTP_AUTH_LABEL   "EXPORTER_DTLS_OVER_SCTP"
+#  endif
+
+/* Max MTU overhead we know about so far is 40 for IPv6 + 8 for UDP */
+#  define DTLS1_MAX_MTU_OVERHEAD                   48
+
+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 */
+#  ifndef OPENSSL_NO_COMP
+    COMP_CTX *compress;         /* compression */
+#  else
+    char *compress;
+#  endif
+    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;
+};
+
+typedef struct record_pqueue_st {
+    unsigned short epoch;
+    pqueue q;
+} record_pqueue;
+
+typedef struct hm_fragment_st {
+    struct hm_header_st msg_header;
+    unsigned char *fragment;
+    unsigned char *reassembly;
+} hm_fragment;
+
+typedef struct dtls1_state_st {
+    unsigned int send_cookie;
+    unsigned char cookie[DTLS1_COOKIE_LENGTH];
+    unsigned char rcvd_cookie[DTLS1_COOKIE_LENGTH];
+    unsigned int cookie_len;
+    /*
+     * The current data and handshake epoch.  This is initially
+     * undefined, and starts at zero once the initial handshake is
+     * completed
+     */
+    unsigned short r_epoch;
+    unsigned short w_epoch;
+    /* records being received in the current epoch */
+    DTLS1_BITMAP bitmap;
+    /* renegotiation starts a new set of sequence numbers */
+    DTLS1_BITMAP next_bitmap;
+    /* handshake message numbers */
+    unsigned short handshake_write_seq;
+    unsigned short next_handshake_write_seq;
+    unsigned short handshake_read_seq;
+    /* save last sequence number for retransmissions */
+    unsigned char last_write_sequence[8];
+    /* Received handshake records (processed and unprocessed) */
+    record_pqueue unprocessed_rcds;
+    record_pqueue processed_rcds;
+    /* Buffered handshake messages */
+    pqueue buffered_messages;
+    /* Buffered (sent) handshake records */
+    pqueue sent_messages;
+    /*
+     * Buffered application records. Only for records between CCS and
+     * Finished to prevent either protocol violation or unnecessary message
+     * loss.
+     */
+    record_pqueue buffered_app_data;
+    /* Is set when listening for new connections with dtls1_listen() */
+    unsigned int listen;
+    unsigned int link_mtu;      /* max on-the-wire DTLS packet size */
+    unsigned int mtu;           /* max DTLS packet size */
+    struct hm_header_st w_msg_hdr;
+    struct hm_header_st r_msg_hdr;
+    struct dtls1_timeout_st timeout;
+    /*
+     * Indicates when the last handshake msg or heartbeat sent will timeout
+     */
+    struct timeval next_timeout;
+    /* Timeout duration */
+    unsigned short timeout_duration;
+    /*
+     * storage for Alert/Handshake protocol data received but not yet
+     * processed by ssl3_read_bytes:
+     */
+    unsigned char alert_fragment[DTLS1_AL_HEADER_LENGTH];
+    unsigned int alert_fragment_len;
+    unsigned char handshake_fragment[DTLS1_HM_HEADER_LENGTH];
+    unsigned int handshake_fragment_len;
+    unsigned int retransmitting;
+    /*
+     * Set when the handshake is ready to process peer's ChangeCipherSpec message.
+     * Cleared after the message has been processed.
+     */
+    unsigned int change_cipher_spec_ok;
+#  ifndef OPENSSL_NO_SCTP
+    /* used when SSL_ST_XX_FLUSH is entered */
+    int next_state;
+    int shutdown_received;
+#  endif
+} DTLS1_STATE;
+
+typedef struct dtls1_record_data_st {
+    unsigned char *packet;
+    unsigned int packet_length;
+    SSL3_BUFFER rbuf;
+    SSL3_RECORD rrec;
+#  ifndef OPENSSL_NO_SCTP
+    struct bio_dgram_sctp_rcvinfo recordinfo;
+#  endif
+} 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