Delete bundled copy of OpenSSL and replace with README.

openssl/ssl/d1_both.c

Index: openssl/ssl/d1_both.c
diff --git a/openssl/ssl/d1_both.c b/openssl/ssl/d1_both.c
deleted file mode 100644
index 9a250fdab2162b77ffb6bada5836888d5b9d7cc8..0000000000000000000000000000000000000000
--- a/openssl/ssl/d1_both.c
+++ /dev/null
@@ -1,1600 +0,0 @@
-/* ssl/d1_both.c */
-/* 
- * DTLS implementation written by Nagendra Modadugu
- * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.  
- */
-/* ====================================================================
- * Copyright (c) 1998-2005 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).
- *
- */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- * 
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to.  The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- * 
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- * 
- * 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 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 acknowledgement:
- *    "This product includes cryptographic software written by
- *     Eric Young (eay@cryptsoft.com)"
- *    The word 'cryptographic' can be left out if the rouines from the library
- *    being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from 
- *    the apps directory (application code) you must include an acknowledgement:
- *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- * 
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS 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 AUTHOR OR 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.
- * 
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed.  i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
-
-#include <limits.h>
-#include <string.h>
-#include <stdio.h>
-#include "ssl_locl.h"
-#include <openssl/buffer.h>
-#include <openssl/rand.h>
-#include <openssl/objects.h>
-#include <openssl/evp.h>
-#include <openssl/x509.h>
-
-#define RSMBLY_BITMASK_SIZE(msg_len) (((msg_len) + 7) / 8)
-
-#define RSMBLY_BITMASK_MARK(bitmask, start, end) { \
-			if ((end) - (start) <= 8) { \
-				long ii; \
-				for (ii = (start); ii < (end); ii++) bitmask[((ii) >> 3)] |= (1 << ((ii) & 7)); \
-			} else { \
-				long ii; \
-				bitmask[((start) >> 3)] |= bitmask_start_values[((start) & 7)]; \
-				for (ii = (((start) >> 3) + 1); ii < ((((end) - 1)) >> 3); ii++) bitmask[ii] = 0xff; \
-				bitmask[(((end) - 1) >> 3)] |= bitmask_end_values[((end) & 7)]; \
-			} }
-
-#define RSMBLY_BITMASK_IS_COMPLETE(bitmask, msg_len, is_complete) { \
-			long ii; \
-			OPENSSL_assert((msg_len) > 0); \
-			is_complete = 1; \
-			if (bitmask[(((msg_len) - 1) >> 3)] != bitmask_end_values[((msg_len) & 7)]) is_complete = 0; \
-			if (is_complete) for (ii = (((msg_len) - 1) >> 3) - 1; ii >= 0 ; ii--) \
-				if (bitmask[ii] != 0xff) { is_complete = 0; break; } }
-
-#if 0
-#define RSMBLY_BITMASK_PRINT(bitmask, msg_len) { \
-			long ii; \
-			printf("bitmask: "); for (ii = 0; ii < (msg_len); ii++) \
-			printf("%d ", (bitmask[ii >> 3] & (1 << (ii & 7))) >> (ii & 7)); \
-			printf("\n"); }
-#endif
-
-static unsigned char bitmask_start_values[] = {0xff, 0xfe, 0xfc, 0xf8, 0xf0, 0xe0, 0xc0, 0x80};
-static unsigned char bitmask_end_values[]   = {0xff, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f};
-
-/* XDTLS:  figure out the right values */
-static unsigned int g_probable_mtu[] = {1500 - 28, 512 - 28, 256 - 28};
-
-static unsigned int dtls1_guess_mtu(unsigned int curr_mtu);
-static void dtls1_fix_message_header(SSL *s, unsigned long frag_off, 
-	unsigned long frag_len);
-static unsigned char *dtls1_write_message_header(SSL *s,
-	unsigned char *p);
-static void dtls1_set_message_header_int(SSL *s, unsigned char mt,
-	unsigned long len, unsigned short seq_num, unsigned long frag_off, 
-	unsigned long frag_len);
-static long dtls1_get_message_fragment(SSL *s, int st1, int stn, 
-	long max, int *ok);
-
-static hm_fragment *
-dtls1_hm_fragment_new(unsigned long frag_len, int reassembly)
-	{
-	hm_fragment *frag = NULL;
-	unsigned char *buf = NULL;
-	unsigned char *bitmask = NULL;
-
-	frag = (hm_fragment *)OPENSSL_malloc(sizeof(hm_fragment));
-	if ( frag == NULL)
-		return NULL;
-
-	if (frag_len)
-		{
-		buf = (unsigned char *)OPENSSL_malloc(frag_len);
-		if ( buf == NULL)
-			{
-			OPENSSL_free(frag);
-			return NULL;
-			}
-		}
-
-	/* zero length fragment gets zero frag->fragment */
-	frag->fragment = buf;
-
-	/* Initialize reassembly bitmask if necessary */
-	if (reassembly)
-		{
-		bitmask = (unsigned char *)OPENSSL_malloc(RSMBLY_BITMASK_SIZE(frag_len));
-		if (bitmask == NULL)
-			{
-			if (buf != NULL) OPENSSL_free(buf);
-			OPENSSL_free(frag);
-			return NULL;
-			}
-		memset(bitmask, 0, RSMBLY_BITMASK_SIZE(frag_len));
-		}
-
-	frag->reassembly = bitmask;
-
-	return frag;
-	}
-
-static void
-dtls1_hm_fragment_free(hm_fragment *frag)
-	{
-	if (frag->fragment) OPENSSL_free(frag->fragment);
-	if (frag->reassembly) OPENSSL_free(frag->reassembly);
-	OPENSSL_free(frag);
-	}
-
-/* send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or SSL3_RT_CHANGE_CIPHER_SPEC) */
-int dtls1_do_write(SSL *s, int type)
-	{
-	int ret;
-	int curr_mtu;
-	unsigned int len, frag_off, mac_size, blocksize;
-
-	/* AHA!  Figure out the MTU, and stick to the right size */
-	if (s->d1->mtu < dtls1_min_mtu() && !(SSL_get_options(s) & SSL_OP_NO_QUERY_MTU))
-		{
-		s->d1->mtu = 
-			BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
-
-		/* I've seen the kernel return bogus numbers when it doesn't know
-		 * (initial write), so just make sure we have a reasonable number */
-		if (s->d1->mtu < dtls1_min_mtu())
-			{
-			s->d1->mtu = 0;
-			s->d1->mtu = dtls1_guess_mtu(s->d1->mtu);
-			BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SET_MTU, 
-				s->d1->mtu, NULL);
-			}
-		}
-#if 0 
-	mtu = s->d1->mtu;
-
-	fprintf(stderr, "using MTU = %d\n", mtu);
-
-	mtu -= (DTLS1_HM_HEADER_LENGTH + DTLS1_RT_HEADER_LENGTH);
-
-	curr_mtu = mtu - BIO_wpending(SSL_get_wbio(s));
-
-	if ( curr_mtu > 0)
-		mtu = curr_mtu;
-	else if ( ( ret = BIO_flush(SSL_get_wbio(s))) <= 0)
-		return ret;
-
-	if ( BIO_wpending(SSL_get_wbio(s)) + s->init_num >= mtu)
-		{
-		ret = BIO_flush(SSL_get_wbio(s));
-		if ( ret <= 0)
-			return ret;
-		mtu = s->d1->mtu - (DTLS1_HM_HEADER_LENGTH + DTLS1_RT_HEADER_LENGTH);
-		}
-#endif
-
-	OPENSSL_assert(s->d1->mtu >= dtls1_min_mtu());  /* should have something reasonable now */
-
-	if ( s->init_off == 0  && type == SSL3_RT_HANDSHAKE)
-		OPENSSL_assert(s->init_num == 
-			(int)s->d1->w_msg_hdr.msg_len + DTLS1_HM_HEADER_LENGTH);
-
-	if (s->write_hash)
-		mac_size = EVP_MD_CTX_size(s->write_hash);
-	else
-		mac_size = 0;
-
-	if (s->enc_write_ctx && 
-		(EVP_CIPHER_mode( s->enc_write_ctx->cipher) & EVP_CIPH_CBC_MODE))
-		blocksize = 2 * EVP_CIPHER_block_size(s->enc_write_ctx->cipher);
-	else
-		blocksize = 0;
-
-	frag_off = 0;
-	while( s->init_num)
-		{
-		curr_mtu = s->d1->mtu - BIO_wpending(SSL_get_wbio(s)) - 
-			DTLS1_RT_HEADER_LENGTH - mac_size - blocksize;
-
-		if ( curr_mtu <= DTLS1_HM_HEADER_LENGTH)
-			{
-			/* grr.. we could get an error if MTU picked was wrong */
-			ret = BIO_flush(SSL_get_wbio(s));
-			if ( ret <= 0)
-				return ret;
-			curr_mtu = s->d1->mtu - DTLS1_RT_HEADER_LENGTH -
-				mac_size - blocksize;
-			}
-
-		if ( s->init_num > curr_mtu)
-			len = curr_mtu;
-		else
-			len = s->init_num;
-
-
-		/* XDTLS: this function is too long.  split out the CCS part */
-		if ( type == SSL3_RT_HANDSHAKE)
-			{
-			if ( s->init_off != 0)
-				{
-				OPENSSL_assert(s->init_off > DTLS1_HM_HEADER_LENGTH);
-				s->init_off -= DTLS1_HM_HEADER_LENGTH;
-				s->init_num += DTLS1_HM_HEADER_LENGTH;
-
-				/* write atleast DTLS1_HM_HEADER_LENGTH bytes */
-				if ( len <= DTLS1_HM_HEADER_LENGTH)  
-					len += DTLS1_HM_HEADER_LENGTH;
-				}
-
-			dtls1_fix_message_header(s, frag_off, 
-				len - DTLS1_HM_HEADER_LENGTH);
-
-			dtls1_write_message_header(s, (unsigned char *)&s->init_buf->data[s->init_off]);
-
-			OPENSSL_assert(len >= DTLS1_HM_HEADER_LENGTH);
-			}
-
-		ret=dtls1_write_bytes(s,type,&s->init_buf->data[s->init_off],
-			len);
-		if (ret < 0)
-			{
-			/* might need to update MTU here, but we don't know
-			 * which previous packet caused the failure -- so can't
-			 * really retransmit anything.  continue as if everything
-			 * is fine and wait for an alert to handle the
-			 * retransmit 
-			 */
-			if ( BIO_ctrl(SSL_get_wbio(s),
-				BIO_CTRL_DGRAM_MTU_EXCEEDED, 0, NULL) > 0 )
-				s->d1->mtu = BIO_ctrl(SSL_get_wbio(s),
-					BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL);
-			else
-				return(-1);
-			}
-		else
-			{
-
-			/* bad if this assert fails, only part of the handshake
-			 * message got sent.  but why would this happen? */
-			OPENSSL_assert(len == (unsigned int)ret);
-
-			if (type == SSL3_RT_HANDSHAKE && ! s->d1->retransmitting)
-				{
-				/* should not be done for 'Hello Request's, but in that case
-				 * we'll ignore the result anyway */
-				unsigned char *p = (unsigned char *)&s->init_buf->data[s->init_off];
-				const struct hm_header_st *msg_hdr = &s->d1->w_msg_hdr;
-				int xlen;
-
-				if (frag_off == 0 && s->version != DTLS1_BAD_VER)
-					{
-					/* reconstruct message header is if it
-					 * is being sent in single fragment */
-					*p++ = msg_hdr->type;
-					l2n3(msg_hdr->msg_len,p);
-					s2n (msg_hdr->seq,p);
-					l2n3(0,p);
-					l2n3(msg_hdr->msg_len,p);
-					p  -= DTLS1_HM_HEADER_LENGTH;
-					xlen = ret;
-					}
-				else
-					{
-					p  += DTLS1_HM_HEADER_LENGTH;
-					xlen = ret - DTLS1_HM_HEADER_LENGTH;
-					}
-
-				ssl3_finish_mac(s, p, xlen);
-				}
-
-			if (ret == s->init_num)
-				{
-				if (s->msg_callback)
-					s->msg_callback(1, s->version, type, s->init_buf->data, 
-						(size_t)(s->init_off + s->init_num), s, 
-						s->msg_callback_arg);
-
-				s->init_off = 0;  /* done writing this message */
-				s->init_num = 0;
-
-				return(1);
-				}
-			s->init_off+=ret;
-			s->init_num-=ret;
-			frag_off += (ret -= DTLS1_HM_HEADER_LENGTH);
-			}
-		}
-	return(0);
-	}
-
-
-/* Obtain handshake message of message type 'mt' (any if mt == -1),
- * maximum acceptable body length 'max'.
- * Read an entire handshake message.  Handshake messages arrive in
- * fragments.
- */
-long dtls1_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
-	{
-	int i, al;
-	struct hm_header_st *msg_hdr;
-	unsigned char *p;
-	unsigned long msg_len;
-
-	/* s3->tmp is used to store messages that are unexpected, caused
-	 * by the absence of an optional handshake message */
-	if (s->s3->tmp.reuse_message)
-		{
-		s->s3->tmp.reuse_message=0;
-		if ((mt >= 0) && (s->s3->tmp.message_type != mt))
-			{
-			al=SSL_AD_UNEXPECTED_MESSAGE;
-			SSLerr(SSL_F_DTLS1_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
-			goto f_err;
-			}
-		*ok=1;
-		s->init_msg = s->init_buf->data + DTLS1_HM_HEADER_LENGTH;
-		s->init_num = (int)s->s3->tmp.message_size;
-		return s->init_num;
-		}
-
-	msg_hdr = &s->d1->r_msg_hdr;
-	memset(msg_hdr, 0x00, sizeof(struct hm_header_st));
-
-again:
-	i = dtls1_get_message_fragment(s, st1, stn, max, ok);
-	if ( i == DTLS1_HM_BAD_FRAGMENT ||
-		i == DTLS1_HM_FRAGMENT_RETRY)  /* bad fragment received */
-		goto again;
-	else if ( i <= 0 && !*ok)
-		return i;
-
-	p = (unsigned char *)s->init_buf->data;
-	msg_len = msg_hdr->msg_len;
-
-	/* reconstruct message header */
-	*(p++) = msg_hdr->type;
-	l2n3(msg_len,p);
-	s2n (msg_hdr->seq,p);
-	l2n3(0,p);
-	l2n3(msg_len,p);
-	if (s->version != DTLS1_BAD_VER) {
-		p       -= DTLS1_HM_HEADER_LENGTH;
-		msg_len += DTLS1_HM_HEADER_LENGTH;
-	}
-
-	ssl3_finish_mac(s, p, msg_len);
-	if (s->msg_callback)
-		s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE,
-			p, msg_len,
-			s, s->msg_callback_arg);
-
-	memset(msg_hdr, 0x00, sizeof(struct hm_header_st));
-
-	/* Don't change sequence numbers while listening */
-	if (!s->d1->listen)
-		s->d1->handshake_read_seq++;
-
-	s->init_msg = s->init_buf->data + DTLS1_HM_HEADER_LENGTH;
-	return s->init_num;
-
-f_err:
-	ssl3_send_alert(s,SSL3_AL_FATAL,al);
-	*ok = 0;
-	return -1;
-	}
-
-
-static int dtls1_preprocess_fragment(SSL *s,struct hm_header_st *msg_hdr,int max)
-	{
-	size_t frag_off,frag_len,msg_len;
-
-	msg_len  = msg_hdr->msg_len;
-	frag_off = msg_hdr->frag_off;
-	frag_len = msg_hdr->frag_len;
-
-	/* sanity checking */
-	if ( (frag_off+frag_len) > msg_len)
-		{
-		SSLerr(SSL_F_DTLS1_PREPROCESS_FRAGMENT,SSL_R_EXCESSIVE_MESSAGE_SIZE);
-		return SSL_AD_ILLEGAL_PARAMETER;
-		}
-
-	if ( (frag_off+frag_len) > (unsigned long)max)
-		{
-		SSLerr(SSL_F_DTLS1_PREPROCESS_FRAGMENT,SSL_R_EXCESSIVE_MESSAGE_SIZE);
-		return SSL_AD_ILLEGAL_PARAMETER;
-		}
-
-	if ( s->d1->r_msg_hdr.frag_off == 0) /* first fragment */
-		{
-		/* msg_len is limited to 2^24, but is effectively checked
-		 * against max above */
-		if (!BUF_MEM_grow_clean(s->init_buf,msg_len+DTLS1_HM_HEADER_LENGTH))
-			{
-			SSLerr(SSL_F_DTLS1_PREPROCESS_FRAGMENT,ERR_R_BUF_LIB);
-			return SSL_AD_INTERNAL_ERROR;
-			}
-
-		s->s3->tmp.message_size  = msg_len;
-		s->d1->r_msg_hdr.msg_len = msg_len;
-		s->s3->tmp.message_type  = msg_hdr->type;
-		s->d1->r_msg_hdr.type    = msg_hdr->type;
-		s->d1->r_msg_hdr.seq     = msg_hdr->seq;
-		}
-	else if (msg_len != s->d1->r_msg_hdr.msg_len)
-		{
-		/* They must be playing with us! BTW, failure to enforce
-		 * upper limit would open possibility for buffer overrun. */
-		SSLerr(SSL_F_DTLS1_PREPROCESS_FRAGMENT,SSL_R_EXCESSIVE_MESSAGE_SIZE);
-		return SSL_AD_ILLEGAL_PARAMETER;
-		}
-
-	return 0; /* no error */
-	}
-
-
-static int
-dtls1_retrieve_buffered_fragment(SSL *s, long max, int *ok)
-	{
-	/* (0) check whether the desired fragment is available
-	 * if so:
-	 * (1) copy over the fragment to s->init_buf->data[]
-	 * (2) update s->init_num
-	 */
-	pitem *item;
-	hm_fragment *frag;
-	int al;
-
-	*ok = 0;
-	item = pqueue_peek(s->d1->buffered_messages);
-	if ( item == NULL)
-		return 0;
-
-	frag = (hm_fragment *)item->data;
-	
-	/* Don't return if reassembly still in progress */
-	if (frag->reassembly != NULL)
-		return 0;
-
-	if ( s->d1->handshake_read_seq == frag->msg_header.seq)
-		{
-		unsigned long frag_len = frag->msg_header.frag_len;
-		pqueue_pop(s->d1->buffered_messages);
-
-		al=dtls1_preprocess_fragment(s,&frag->msg_header,max);
-
-		if (al==0) /* no alert */
-			{
-			unsigned char *p = (unsigned char *)s->init_buf->data+DTLS1_HM_HEADER_LENGTH;
-			memcpy(&p[frag->msg_header.frag_off],
-				frag->fragment,frag->msg_header.frag_len);
-			}
-
-		dtls1_hm_fragment_free(frag);
-		pitem_free(item);
-
-		if (al==0)
-			{
-			*ok = 1;
-			return frag_len;
-			}
-
-		ssl3_send_alert(s,SSL3_AL_FATAL,al);
-		s->init_num = 0;
-		*ok = 0;
-		return -1;
-		}
-	else
-		return 0;
-	}
-
-
-static int
-dtls1_reassemble_fragment(SSL *s, struct hm_header_st* msg_hdr, int *ok)
-	{
-	hm_fragment *frag = NULL;
-	pitem *item = NULL;
-	int i = -1, is_complete;
-	unsigned char seq64be[8];
-	unsigned long frag_len = msg_hdr->frag_len, max_len;
-
-	if ((msg_hdr->frag_off+frag_len) > msg_hdr->msg_len)
-		goto err;
-
-	/* Determine maximum allowed message size. Depends on (user set)
-	 * maximum certificate length, but 16k is minimum.
-	 */
-	if (DTLS1_HM_HEADER_LENGTH + SSL3_RT_MAX_ENCRYPTED_LENGTH < s->max_cert_list)
-		max_len = s->max_cert_list;
-	else
-		max_len = DTLS1_HM_HEADER_LENGTH + SSL3_RT_MAX_ENCRYPTED_LENGTH;
-
-	if ((msg_hdr->frag_off+frag_len) > max_len)
-		goto err;
-
-	/* Try to find item in queue */
-	memset(seq64be,0,sizeof(seq64be));
-	seq64be[6] = (unsigned char) (msg_hdr->seq>>8);
-	seq64be[7] = (unsigned char) msg_hdr->seq;
-	item = pqueue_find(s->d1->buffered_messages, seq64be);
-
-	if (item == NULL)
-		{
-		frag = dtls1_hm_fragment_new(msg_hdr->msg_len, 1);
-		if ( frag == NULL)
-			goto err;
-		memcpy(&(frag->msg_header), msg_hdr, sizeof(*msg_hdr));
-		frag->msg_header.frag_len = frag->msg_header.msg_len;
-		frag->msg_header.frag_off = 0;
-		}
-	else
-		{
-		frag = (hm_fragment*) item->data;
-		if (frag->msg_header.msg_len != msg_hdr->msg_len)
-			{
-			item = NULL;
-			frag = NULL;
-			goto err;
-			}
-		}
-
-
-	/* If message is already reassembled, this must be a
-	 * retransmit and can be dropped.
-	 */
-	if (frag->reassembly == NULL)
-		{
-		unsigned char devnull [256];
-
-		while (frag_len)
-			{
-			i = s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
-				devnull,
-				frag_len>sizeof(devnull)?sizeof(devnull):frag_len,0);
-			if (i<=0) goto err;
-			frag_len -= i;
-			}
-		return DTLS1_HM_FRAGMENT_RETRY;
-		}
-
-	/* read the body of the fragment (header has already been read */
-	i = s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
-		frag->fragment + msg_hdr->frag_off,frag_len,0);
-	if (i<=0 || (unsigned long)i!=frag_len)
-		goto err;
-
-	RSMBLY_BITMASK_MARK(frag->reassembly, (long)msg_hdr->frag_off,
-	                    (long)(msg_hdr->frag_off + frag_len));
-
-	RSMBLY_BITMASK_IS_COMPLETE(frag->reassembly, (long)msg_hdr->msg_len,
-	                           is_complete);
-
-	if (is_complete)
-		{
-		OPENSSL_free(frag->reassembly);
-		frag->reassembly = NULL;
-		}
-
-	if (item == NULL)
-		{
-		memset(seq64be,0,sizeof(seq64be));
-		seq64be[6] = (unsigned char)(msg_hdr->seq>>8);
-		seq64be[7] = (unsigned char)(msg_hdr->seq);
-
-		item = pitem_new(seq64be, frag);
-		if (item == NULL)
-			{
-			goto err;
-			i = -1;
-			}
-
-		pqueue_insert(s->d1->buffered_messages, item);
-		}
-
-	return DTLS1_HM_FRAGMENT_RETRY;
-
-err:
-	if (frag != NULL) dtls1_hm_fragment_free(frag);
-	if (item != NULL) OPENSSL_free(item);
-	*ok = 0;
-	return i;
-	}
-
-
-static int
-dtls1_process_out_of_seq_message(SSL *s, struct hm_header_st* msg_hdr, int *ok)
-{
-	int i=-1;
-	hm_fragment *frag = NULL;
-	pitem *item = NULL;
-	unsigned char seq64be[8];
-	unsigned long frag_len = msg_hdr->frag_len;
-
-	if ((msg_hdr->frag_off+frag_len) > msg_hdr->msg_len)
-		goto err;
-
-	/* Try to find item in queue, to prevent duplicate entries */
-	memset(seq64be,0,sizeof(seq64be));
-	seq64be[6] = (unsigned char) (msg_hdr->seq>>8);
-	seq64be[7] = (unsigned char) msg_hdr->seq;
-	item = pqueue_find(s->d1->buffered_messages, seq64be);
-
-	/* If we already have an entry and this one is a fragment,
-	 * don't discard it and rather try to reassemble it.
-	 */
-	if (item != NULL && frag_len < msg_hdr->msg_len)
-		item = NULL;
-
-	/* Discard the message if sequence number was already there, is
-	 * too far in the future, already in the queue or if we received
-	 * a FINISHED before the SERVER_HELLO, which then must be a stale
-	 * retransmit.
-	 */
-	if (msg_hdr->seq <= s->d1->handshake_read_seq ||
-		msg_hdr->seq > s->d1->handshake_read_seq + 10 || item != NULL ||
-		(s->d1->handshake_read_seq == 0 && msg_hdr->type == SSL3_MT_FINISHED))
-		{
-		unsigned char devnull [256];
-
-		while (frag_len)
-			{
-			i = s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
-				devnull,
-				frag_len>sizeof(devnull)?sizeof(devnull):frag_len,0);
-			if (i<=0) goto err;
-			frag_len -= i;
-			}
-		}
-	else
-		{
-		if (frag_len && frag_len < msg_hdr->msg_len)
-			return dtls1_reassemble_fragment(s, msg_hdr, ok);
-
-		frag = dtls1_hm_fragment_new(frag_len, 0);
-		if ( frag == NULL)
-			goto err;
-
-		memcpy(&(frag->msg_header), msg_hdr, sizeof(*msg_hdr));
-
-		if (frag_len)
-			{
-			/* read the body of the fragment (header has already been read */
-			i = s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
-				frag->fragment,frag_len,0);
-			if (i<=0 || (unsigned long)i!=frag_len)
-				goto err;
-			}
-
-		memset(seq64be,0,sizeof(seq64be));
-		seq64be[6] = (unsigned char)(msg_hdr->seq>>8);
-		seq64be[7] = (unsigned char)(msg_hdr->seq);
-
-		item = pitem_new(seq64be, frag);
-		if ( item == NULL)
-			goto err;
-
-		pqueue_insert(s->d1->buffered_messages, item);
-		}
-
-	return DTLS1_HM_FRAGMENT_RETRY;
-
-err:
-	if ( frag != NULL) dtls1_hm_fragment_free(frag);
-	if ( item != NULL) OPENSSL_free(item);
-	*ok = 0;
-	return i;
-	}
-
-
-static long
-dtls1_get_message_fragment(SSL *s, int st1, int stn, long max, int *ok)
-	{
-	unsigned char wire[DTLS1_HM_HEADER_LENGTH];
-	unsigned long len, frag_off, frag_len;
-	int i,al;
-	struct hm_header_st msg_hdr;
-
-	redo:
-	/* see if we have the required fragment already */
-	if ((frag_len = dtls1_retrieve_buffered_fragment(s,max,ok)) || *ok)
-		{
-		if (*ok)	s->init_num = frag_len;
-		return frag_len;
-		}
-
-	/* read handshake message header */
-	i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,wire,
-		DTLS1_HM_HEADER_LENGTH, 0);
-	if (i <= 0) 	/* nbio, or an error */
-		{
-		s->rwstate=SSL_READING;
-		*ok = 0;
-		return i;
-		}
-	/* Handshake fails if message header is incomplete */
-	if (i != DTLS1_HM_HEADER_LENGTH)
-		{
-		al=SSL_AD_UNEXPECTED_MESSAGE;
-		SSLerr(SSL_F_DTLS1_GET_MESSAGE_FRAGMENT,SSL_R_UNEXPECTED_MESSAGE);
-		goto f_err;
-		}
-
-	/* parse the message fragment header */
-	dtls1_get_message_header(wire, &msg_hdr);
-
-	/* 
-	 * if this is a future (or stale) message it gets buffered
-	 * (or dropped)--no further processing at this time
-	 * While listening, we accept seq 1 (ClientHello with cookie)
-	 * although we're still expecting seq 0 (ClientHello)
-	 */
-	if (msg_hdr.seq != s->d1->handshake_read_seq && !(s->d1->listen && msg_hdr.seq == 1))
-		return dtls1_process_out_of_seq_message(s, &msg_hdr, ok);
-
-	len = msg_hdr.msg_len;
-	frag_off = msg_hdr.frag_off;
-	frag_len = msg_hdr.frag_len;
-
-	if (frag_len && frag_len < len)
-		return dtls1_reassemble_fragment(s, &msg_hdr, ok);
-
-	if (!s->server && s->d1->r_msg_hdr.frag_off == 0 &&
-		wire[0] == SSL3_MT_HELLO_REQUEST)
-		{
-		/* The server may always send 'Hello Request' messages --
-		 * we are doing a handshake anyway now, so ignore them
-		 * if their format is correct. Does not count for
-		 * 'Finished' MAC. */
-		if (wire[1] == 0 && wire[2] == 0 && wire[3] == 0)
-			{
-			if (s->msg_callback)
-				s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, 
-					wire, DTLS1_HM_HEADER_LENGTH, s, 
-					s->msg_callback_arg);
-			
-			s->init_num = 0;
-			goto redo;
-			}
-		else /* Incorrectly formated Hello request */
-			{
-			al=SSL_AD_UNEXPECTED_MESSAGE;
-			SSLerr(SSL_F_DTLS1_GET_MESSAGE_FRAGMENT,SSL_R_UNEXPECTED_MESSAGE);
-			goto f_err;
-			}
-		}
-
-	if ((al=dtls1_preprocess_fragment(s,&msg_hdr,max)))
-		goto f_err;
-
-	/* XDTLS:  ressurect this when restart is in place */
-	s->state=stn;
-
-	if ( frag_len > 0)
-		{
-		unsigned char *p=(unsigned char *)s->init_buf->data+DTLS1_HM_HEADER_LENGTH;
-
-		i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
-			&p[frag_off],frag_len,0);
-		/* XDTLS:  fix this--message fragments cannot span multiple packets */
-		if (i <= 0)
-			{
-			s->rwstate=SSL_READING;
-			*ok = 0;
-			return i;
-			}
-		}
-	else
-		i = 0;
-
-	/* XDTLS:  an incorrectly formatted fragment should cause the 
-	 * handshake to fail */
-	if (i != (int)frag_len)
-		{
-		al=SSL3_AD_ILLEGAL_PARAMETER;
-		SSLerr(SSL_F_DTLS1_GET_MESSAGE_FRAGMENT,SSL3_AD_ILLEGAL_PARAMETER);
-		goto f_err;
-		}
-
-	*ok = 1;
-
-	/* Note that s->init_num is *not* used as current offset in
-	 * s->init_buf->data, but as a counter summing up fragments'
-	 * lengths: as soon as they sum up to handshake packet
-	 * length, we assume we have got all the fragments. */
-	s->init_num = frag_len;
-	return frag_len;
-
-f_err:
-	ssl3_send_alert(s,SSL3_AL_FATAL,al);
-	s->init_num = 0;
-
-	*ok=0;
-	return(-1);
-	}
-
-int dtls1_send_finished(SSL *s, int a, int b, const char *sender, int slen)
-	{
-	unsigned char *p,*d;
-	int i;
-	unsigned long l;
-
-	if (s->state == a)
-		{
-		d=(unsigned char *)s->init_buf->data;
-		p= &(d[DTLS1_HM_HEADER_LENGTH]);
-
-		i=s->method->ssl3_enc->final_finish_mac(s,
-			sender,slen,s->s3->tmp.finish_md);
-		s->s3->tmp.finish_md_len = i;
-		memcpy(p, s->s3->tmp.finish_md, i);
-		p+=i;
-		l=i;
-
-	/* Copy the finished so we can use it for
-	 * renegotiation checks
-	 */
-	if(s->type == SSL_ST_CONNECT)
-		{
-		OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
-		memcpy(s->s3->previous_client_finished, 
-		       s->s3->tmp.finish_md, i);
-		s->s3->previous_client_finished_len=i;
-		}
-	else
-		{
-		OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
-		memcpy(s->s3->previous_server_finished, 
-		       s->s3->tmp.finish_md, i);
-		s->s3->previous_server_finished_len=i;
-		}
-
-#ifdef OPENSSL_SYS_WIN16
-		/* MSVC 1.5 does not clear the top bytes of the word unless
-		 * I do this.
-		 */
-		l&=0xffff;
-#endif
-
-		d = dtls1_set_message_header(s, d, SSL3_MT_FINISHED, l, 0, l);
-		s->init_num=(int)l+DTLS1_HM_HEADER_LENGTH;
-		s->init_off=0;
-
-		/* buffer the message to handle re-xmits */
-		dtls1_buffer_message(s, 0);
-
-		s->state=b;
-		}
-
-	/* SSL3_ST_SEND_xxxxxx_HELLO_B */
-	return(dtls1_do_write(s,SSL3_RT_HANDSHAKE));
-	}
-
-/* for these 2 messages, we need to
- * ssl->enc_read_ctx			re-init
- * ssl->s3->read_sequence		zero
- * ssl->s3->read_mac_secret		re-init
- * ssl->session->read_sym_enc		assign
- * ssl->session->read_compression	assign
- * ssl->session->read_hash		assign
- */
-int dtls1_send_change_cipher_spec(SSL *s, int a, int b)
-	{ 
-	unsigned char *p;
-
-	if (s->state == a)
-		{
-		p=(unsigned char *)s->init_buf->data;
-		*p++=SSL3_MT_CCS;
-		s->d1->handshake_write_seq = s->d1->next_handshake_write_seq;
-		s->init_num=DTLS1_CCS_HEADER_LENGTH;
-
-		if (s->version == DTLS1_BAD_VER) {
-			s->d1->next_handshake_write_seq++;
-			s2n(s->d1->handshake_write_seq,p);
-			s->init_num+=2;
-		}
-
-		s->init_off=0;
-
-		dtls1_set_message_header_int(s, SSL3_MT_CCS, 0, 
-			s->d1->handshake_write_seq, 0, 0);
-
-		/* buffer the message to handle re-xmits */
-		dtls1_buffer_message(s, 1);
-
-		s->state=b;
-		}
-
-	/* SSL3_ST_CW_CHANGE_B */
-	return(dtls1_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
-	}
-
-static int dtls1_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
-	{
-	int n;
-	unsigned char *p;
-
-	n=i2d_X509(x,NULL);
-	if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
-		{
-		SSLerr(SSL_F_DTLS1_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
-		return 0;
-		}
-	p=(unsigned char *)&(buf->data[*l]);
-	l2n3(n,p);
-	i2d_X509(x,&p);
-	*l+=n+3;
-
-	return 1;
-	}
-unsigned long dtls1_output_cert_chain(SSL *s, X509 *x)
-	{
-	unsigned char *p;
-	int i;
-	unsigned long l= 3 + DTLS1_HM_HEADER_LENGTH;
-	BUF_MEM *buf;
-
-	/* TLSv1 sends a chain with nothing in it, instead of an alert */
-	buf=s->init_buf;
-	if (!BUF_MEM_grow_clean(buf,10))
-		{
-		SSLerr(SSL_F_DTLS1_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
-		return(0);
-		}
-	if (x != NULL)
-		{
-		X509_STORE_CTX xs_ctx;
-
-		if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL))
-  			{
-  			SSLerr(SSL_F_DTLS1_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB);
-  			return(0);
-  			}
-  
-		X509_verify_cert(&xs_ctx);
-		/* Don't leave errors in the queue */
-		ERR_clear_error();
-		for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
-  			{
-			x = sk_X509_value(xs_ctx.chain, i);
-
-			if (!dtls1_add_cert_to_buf(buf, &l, x))
-  				{
-				X509_STORE_CTX_cleanup(&xs_ctx);
-				return 0;
-  				}
-  			}
-  		X509_STORE_CTX_cleanup(&xs_ctx);
-  		}
-  	/* Thawte special :-) */
-	for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
-		{
-		x=sk_X509_value(s->ctx->extra_certs,i);
-		if (!dtls1_add_cert_to_buf(buf, &l, x))
-			return 0;
-		}
-
-	l-= (3 + DTLS1_HM_HEADER_LENGTH);
-
-	p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH]);
-	l2n3(l,p);
-	l+=3;
-	p=(unsigned char *)&(buf->data[0]);
-	p = dtls1_set_message_header(s, p, SSL3_MT_CERTIFICATE, l, 0, l);
-
-	l+=DTLS1_HM_HEADER_LENGTH;
-	return(l);
-	}
-
-int dtls1_read_failed(SSL *s, int code)
-	{
-	if ( code > 0)
-		{
-		fprintf( stderr, "invalid state reached %s:%d", __FILE__, __LINE__);
-		return 1;
-		}
-
-	if (!dtls1_is_timer_expired(s))
-		{
-		/* not a timeout, none of our business, 
-		   let higher layers handle this.  in fact it's probably an error */
-		return code;
-		}
-
-#ifndef OPENSSL_NO_HEARTBEATS
-	if (!SSL_in_init(s) && !s->tlsext_hb_pending)  /* done, no need to send a retransmit */
-#else
-	if (!SSL_in_init(s))  /* done, no need to send a retransmit */
-#endif
-		{
-		BIO_set_flags(SSL_get_rbio(s), BIO_FLAGS_READ);
-		return code;
-		}
-
-#if 0 /* for now, each alert contains only one record number */
-	item = pqueue_peek(state->rcvd_records);
-	if ( item )
-		{
-		/* send an alert immediately for all the missing records */
-		}
-	else
-#endif
-
-#if 0  /* no more alert sending, just retransmit the last set of messages */
-	if ( state->timeout.read_timeouts >= DTLS1_TMO_READ_COUNT)
-		ssl3_send_alert(s,SSL3_AL_WARNING,
-			DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
-#endif
-
-	return dtls1_handle_timeout(s);
-	}
-
-int
-dtls1_get_queue_priority(unsigned short seq, int is_ccs)
-	{
-	/* The index of the retransmission queue actually is the message sequence number,
-	 * since the queue only contains messages of a single handshake. However, the
-	 * ChangeCipherSpec has no message sequence number and so using only the sequence
-	 * will result in the CCS and Finished having the same index. To prevent this,
-	 * the sequence number is multiplied by 2. In case of a CCS 1 is subtracted.
-	 * This does not only differ CSS and Finished, it also maintains the order of the
-	 * index (important for priority queues) and fits in the unsigned short variable.
-	 */	
-	return seq * 2 - is_ccs;
-	}
-
-int
-dtls1_retransmit_buffered_messages(SSL *s)
-	{
-	pqueue sent = s->d1->sent_messages;
-	piterator iter;
-	pitem *item;
-	hm_fragment *frag;
-	int found = 0;
-
-	iter = pqueue_iterator(sent);
-
-	for ( item = pqueue_next(&iter); item != NULL; item = pqueue_next(&iter))
-		{
-		frag = (hm_fragment *)item->data;
-			if ( dtls1_retransmit_message(s,
-				(unsigned short)dtls1_get_queue_priority(frag->msg_header.seq, frag->msg_header.is_ccs),
-				0, &found) <= 0 && found)
-			{
-			fprintf(stderr, "dtls1_retransmit_message() failed\n");
-			return -1;
-			}
-		}
-
-	return 1;
-	}
-
-int
-dtls1_buffer_message(SSL *s, int is_ccs)
-	{
-	pitem *item;
-	hm_fragment *frag;
-	unsigned char seq64be[8];
-
-	/* this function is called immediately after a message has 
-	 * been serialized */
-	OPENSSL_assert(s->init_off == 0);
-
-	frag = dtls1_hm_fragment_new(s->init_num, 0);
-
-	memcpy(frag->fragment, s->init_buf->data, s->init_num);
-
-	if ( is_ccs)
-		{
-		OPENSSL_assert(s->d1->w_msg_hdr.msg_len + 
-			       ((s->version==DTLS1_VERSION)?DTLS1_CCS_HEADER_LENGTH:3) == (unsigned int)s->init_num);
-		}
-	else
-		{
-		OPENSSL_assert(s->d1->w_msg_hdr.msg_len + 
-			DTLS1_HM_HEADER_LENGTH == (unsigned int)s->init_num);
-		}
-
-	frag->msg_header.msg_len = s->d1->w_msg_hdr.msg_len;
-	frag->msg_header.seq = s->d1->w_msg_hdr.seq;
-	frag->msg_header.type = s->d1->w_msg_hdr.type;
-	frag->msg_header.frag_off = 0;
-	frag->msg_header.frag_len = s->d1->w_msg_hdr.msg_len;
-	frag->msg_header.is_ccs = is_ccs;
-
-	/* save current state*/
-	frag->msg_header.saved_retransmit_state.enc_write_ctx = s->enc_write_ctx;
-	frag->msg_header.saved_retransmit_state.write_hash = s->write_hash;
-	frag->msg_header.saved_retransmit_state.compress = s->compress;
-	frag->msg_header.saved_retransmit_state.session = s->session;
-	frag->msg_header.saved_retransmit_state.epoch = s->d1->w_epoch;
-	
-	memset(seq64be,0,sizeof(seq64be));
-	seq64be[6] = (unsigned char)(dtls1_get_queue_priority(frag->msg_header.seq,
-														  frag->msg_header.is_ccs)>>8);
-	seq64be[7] = (unsigned char)(dtls1_get_queue_priority(frag->msg_header.seq,
-														  frag->msg_header.is_ccs));
-
-	item = pitem_new(seq64be, frag);
-	if ( item == NULL)
-		{
-		dtls1_hm_fragment_free(frag);
-		return 0;
-		}
-
-#if 0
-	fprintf( stderr, "buffered messge: \ttype = %xx\n", msg_buf->type);
-	fprintf( stderr, "\t\t\t\t\tlen = %d\n", msg_buf->len);
-	fprintf( stderr, "\t\t\t\t\tseq_num = %d\n", msg_buf->seq_num);
-#endif
-
-	pqueue_insert(s->d1->sent_messages, item);
-	return 1;
-	}
-
-int
-dtls1_retransmit_message(SSL *s, unsigned short seq, unsigned long frag_off,
-	int *found)
-	{
-	int ret;
-	/* XDTLS: for now assuming that read/writes are blocking */
-	pitem *item;
-	hm_fragment *frag ;
-	unsigned long header_length;
-	unsigned char seq64be[8];
-	struct dtls1_retransmit_state saved_state;
-	unsigned char save_write_sequence[8];
-
-	/*
-	  OPENSSL_assert(s->init_num == 0);
-	  OPENSSL_assert(s->init_off == 0);
-	 */
-
-	/* XDTLS:  the requested message ought to be found, otherwise error */
-	memset(seq64be,0,sizeof(seq64be));
-	seq64be[6] = (unsigned char)(seq>>8);
-	seq64be[7] = (unsigned char)seq;
-
-	item = pqueue_find(s->d1->sent_messages, seq64be);
-	if ( item == NULL)
-		{
-		fprintf(stderr, "retransmit:  message %d non-existant\n", seq);
-		*found = 0;
-		return 0;
-		}
-
-	*found = 1;
-	frag = (hm_fragment *)item->data;
-
-	if ( frag->msg_header.is_ccs)
-		header_length = DTLS1_CCS_HEADER_LENGTH;
-	else
-		header_length = DTLS1_HM_HEADER_LENGTH;
-
-	memcpy(s->init_buf->data, frag->fragment, 
-		frag->msg_header.msg_len + header_length);
-		s->init_num = frag->msg_header.msg_len + header_length;
-
-	dtls1_set_message_header_int(s, frag->msg_header.type, 
-		frag->msg_header.msg_len, frag->msg_header.seq, 0, 
-		frag->msg_header.frag_len);
-
-	/* save current state */
-	saved_state.enc_write_ctx = s->enc_write_ctx;
-	saved_state.write_hash = s->write_hash;
-	saved_state.compress = s->compress;
-	saved_state.session = s->session;
-	saved_state.epoch = s->d1->w_epoch;
-	saved_state.epoch = s->d1->w_epoch;
-	
-	s->d1->retransmitting = 1;
-	
-	/* restore state in which the message was originally sent */
-	s->enc_write_ctx = frag->msg_header.saved_retransmit_state.enc_write_ctx;
-	s->write_hash = frag->msg_header.saved_retransmit_state.write_hash;
-	s->compress = frag->msg_header.saved_retransmit_state.compress;
-	s->session = frag->msg_header.saved_retransmit_state.session;
-	s->d1->w_epoch = frag->msg_header.saved_retransmit_state.epoch;
-	
-	if (frag->msg_header.saved_retransmit_state.epoch == saved_state.epoch - 1)
-	{
-		memcpy(save_write_sequence, s->s3->write_sequence, sizeof(s->s3->write_sequence));
-		memcpy(s->s3->write_sequence, s->d1->last_write_sequence, sizeof(s->s3->write_sequence));
-	}
-	
-	ret = dtls1_do_write(s, frag->msg_header.is_ccs ? 
-						 SSL3_RT_CHANGE_CIPHER_SPEC : SSL3_RT_HANDSHAKE);
-	
-	/* restore current state */
-	s->enc_write_ctx = saved_state.enc_write_ctx;
-	s->write_hash = saved_state.write_hash;
-	s->compress = saved_state.compress;
-	s->session = saved_state.session;
-	s->d1->w_epoch = saved_state.epoch;
-	
-	if (frag->msg_header.saved_retransmit_state.epoch == saved_state.epoch - 1)
-	{
-		memcpy(s->d1->last_write_sequence, s->s3->write_sequence, sizeof(s->s3->write_sequence));
-		memcpy(s->s3->write_sequence, save_write_sequence, sizeof(s->s3->write_sequence));
-	}
-
-	s->d1->retransmitting = 0;
-
-	(void)BIO_flush(SSL_get_wbio(s));
-	return ret;
-	}
-
-/* call this function when the buffered messages are no longer needed */
-void
-dtls1_clear_record_buffer(SSL *s)
-	{
-	pitem *item;
-
-	for(item = pqueue_pop(s->d1->sent_messages);
-		item != NULL; item = pqueue_pop(s->d1->sent_messages))
-		{
-		dtls1_hm_fragment_free((hm_fragment *)item->data);
-		pitem_free(item);
-		}
-	}
-
-
-unsigned char *
-dtls1_set_message_header(SSL *s, unsigned char *p, unsigned char mt,
-			unsigned long len, unsigned long frag_off, unsigned long frag_len)
-	{
-	/* Don't change sequence numbers while listening */
-	if (frag_off == 0 && !s->d1->listen)
-		{
-		s->d1->handshake_write_seq = s->d1->next_handshake_write_seq;
-		s->d1->next_handshake_write_seq++;
-		}
-
-	dtls1_set_message_header_int(s, mt, len, s->d1->handshake_write_seq,
-		frag_off, frag_len);
-
-	return p += DTLS1_HM_HEADER_LENGTH;
-	}
-
-
-/* don't actually do the writing, wait till the MTU has been retrieved */
-static void
-dtls1_set_message_header_int(SSL *s, unsigned char mt,
-			    unsigned long len, unsigned short seq_num, unsigned long frag_off,
-			    unsigned long frag_len)
-	{
-	struct hm_header_st *msg_hdr = &s->d1->w_msg_hdr;
-
-	msg_hdr->type = mt;
-	msg_hdr->msg_len = len;
-	msg_hdr->seq = seq_num;
-	msg_hdr->frag_off = frag_off;
-	msg_hdr->frag_len = frag_len;
-	}
-
-static void
-dtls1_fix_message_header(SSL *s, unsigned long frag_off,
-			unsigned long frag_len)
-	{
-	struct hm_header_st *msg_hdr = &s->d1->w_msg_hdr;
-
-	msg_hdr->frag_off = frag_off;
-	msg_hdr->frag_len = frag_len;
-	}
-
-static unsigned char *
-dtls1_write_message_header(SSL *s, unsigned char *p)
-	{
-	struct hm_header_st *msg_hdr = &s->d1->w_msg_hdr;
-
-	*p++ = msg_hdr->type;
-	l2n3(msg_hdr->msg_len, p);
-
-	s2n(msg_hdr->seq, p);
-	l2n3(msg_hdr->frag_off, p);
-	l2n3(msg_hdr->frag_len, p);
-
-	return p;
-	}
-
-unsigned int 
-dtls1_min_mtu(void)
-	{
-	return (g_probable_mtu[(sizeof(g_probable_mtu) / 
-		sizeof(g_probable_mtu[0])) - 1]);
-	}
-
-static unsigned int 
-dtls1_guess_mtu(unsigned int curr_mtu)
-	{
-	unsigned int i;
-
-	if ( curr_mtu == 0 )
-		return g_probable_mtu[0] ;
-
-	for ( i = 0; i < sizeof(g_probable_mtu)/sizeof(g_probable_mtu[0]); i++)
-		if ( curr_mtu > g_probable_mtu[i])
-			return g_probable_mtu[i];
-
-	return curr_mtu;
-	}
-
-void
-dtls1_get_message_header(unsigned char *data, struct hm_header_st *msg_hdr)
-	{
-	memset(msg_hdr, 0x00, sizeof(struct hm_header_st));
-	msg_hdr->type = *(data++);
-	n2l3(data, msg_hdr->msg_len);
-
-	n2s(data, msg_hdr->seq);
-	n2l3(data, msg_hdr->frag_off);
-	n2l3(data, msg_hdr->frag_len);
-	}
-
-void
-dtls1_get_ccs_header(unsigned char *data, struct ccs_header_st *ccs_hdr)
-	{
-	memset(ccs_hdr, 0x00, sizeof(struct ccs_header_st));
-
-	ccs_hdr->type = *(data++);
-	}
-
-int dtls1_shutdown(SSL *s)
-	{
-	int ret;
-#ifndef OPENSSL_NO_SCTP
-	if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
-	    !(s->shutdown & SSL_SENT_SHUTDOWN))
-		{
-		ret = BIO_dgram_sctp_wait_for_dry(SSL_get_wbio(s));
-		if (ret < 0) return -1;
-
-		if (ret == 0)
-			BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN, 1, NULL);
-		}
-#endif
-	ret = ssl3_shutdown(s);
-#ifndef OPENSSL_NO_SCTP
-	BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN, 0, NULL);
-#endif
-	return ret;
-	}
-
-#ifndef OPENSSL_NO_HEARTBEATS
-int
-dtls1_process_heartbeat(SSL *s)
-	{
-	unsigned char *p = &s->s3->rrec.data[0], *pl;
-	unsigned short hbtype;
-	unsigned int payload;
-	unsigned int padding = 16; /* Use minimum padding */
-
-	/* Read type and payload length first */
-	hbtype = *p++;
-	n2s(p, payload);
-	pl = p;
-
-	if (s->msg_callback)
-		s->msg_callback(0, s->version, TLS1_RT_HEARTBEAT,
-			&s->s3->rrec.data[0], s->s3->rrec.length,
-			s, s->msg_callback_arg);
-
-	if (hbtype == TLS1_HB_REQUEST)
-		{
-		unsigned char *buffer, *bp;
-		int r;
-
-		/* Allocate memory for the response, size is 1 byte
-		 * message type, plus 2 bytes payload length, plus
-		 * payload, plus padding
-		 */
-		buffer = OPENSSL_malloc(1 + 2 + payload + padding);
-		bp = buffer;
-
-		/* Enter response type, length and copy payload */
-		*bp++ = TLS1_HB_RESPONSE;
-		s2n(payload, bp);
-		memcpy(bp, pl, payload);
-		bp += payload;
-		/* Random padding */
-		RAND_pseudo_bytes(bp, padding);
-
-		r = dtls1_write_bytes(s, TLS1_RT_HEARTBEAT, buffer, 3 + payload + padding);
-
-		if (r >= 0 && s->msg_callback)
-			s->msg_callback(1, s->version, TLS1_RT_HEARTBEAT,
-				buffer, 3 + payload + padding,
-				s, s->msg_callback_arg);
-
-		OPENSSL_free(buffer);
-
-		if (r < 0)
-			return r;
-		}
-	else if (hbtype == TLS1_HB_RESPONSE)
-		{
-		unsigned int seq;
-
-		/* We only send sequence numbers (2 bytes unsigned int),
-		 * and 16 random bytes, so we just try to read the
-		 * sequence number */
-		n2s(pl, seq);
-
-		if (payload == 18 && seq == s->tlsext_hb_seq)
-			{
-			dtls1_stop_timer(s);
-			s->tlsext_hb_seq++;
-			s->tlsext_hb_pending = 0;
-			}
-		}
-
-	return 0;
-	}
-
-int
-dtls1_heartbeat(SSL *s)
-	{
-	unsigned char *buf, *p;
-	int ret;
-	unsigned int payload = 18; /* Sequence number + random bytes */
-	unsigned int padding = 16; /* Use minimum padding */
-
-	/* Only send if peer supports and accepts HB requests... */
-	if (!(s->tlsext_heartbeat & SSL_TLSEXT_HB_ENABLED) ||
-	    s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_SEND_REQUESTS)
-		{
-		SSLerr(SSL_F_DTLS1_HEARTBEAT,SSL_R_TLS_HEARTBEAT_PEER_DOESNT_ACCEPT);
-		return -1;
-		}
-
-	/* ...and there is none in flight yet... */
-	if (s->tlsext_hb_pending)
-		{
-		SSLerr(SSL_F_DTLS1_HEARTBEAT,SSL_R_TLS_HEARTBEAT_PENDING);
-		return -1;
-		}
-
-	/* ...and no handshake in progress. */
-	if (SSL_in_init(s) || s->in_handshake)
-		{
-		SSLerr(SSL_F_DTLS1_HEARTBEAT,SSL_R_UNEXPECTED_MESSAGE);
-		return -1;
-		}
-
-	/* Check if padding is too long, payload and padding
-	 * must not exceed 2^14 - 3 = 16381 bytes in total.
-	 */
-	OPENSSL_assert(payload + padding <= 16381);
-
-	/* Create HeartBeat message, we just use a sequence number
-	 * as payload to distuingish different messages and add
-	 * some random stuff.
-	 *  - Message Type, 1 byte
-	 *  - Payload Length, 2 bytes (unsigned int)
-	 *  - Payload, the sequence number (2 bytes uint)
-	 *  - Payload, random bytes (16 bytes uint)
-	 *  - Padding
-	 */
-	buf = OPENSSL_malloc(1 + 2 + payload + padding);
-	p = buf;
-	/* Message Type */
-	*p++ = TLS1_HB_REQUEST;
-	/* Payload length (18 bytes here) */
-	s2n(payload, p);
-	/* Sequence number */
-	s2n(s->tlsext_hb_seq, p);
-	/* 16 random bytes */
-	RAND_pseudo_bytes(p, 16);
-	p += 16;
-	/* Random padding */
-	RAND_pseudo_bytes(p, padding);
-
-	ret = dtls1_write_bytes(s, TLS1_RT_HEARTBEAT, buf, 3 + payload + padding);
-	if (ret >= 0)
-		{
-		if (s->msg_callback)
-			s->msg_callback(1, s->version, TLS1_RT_HEARTBEAT,
-				buf, 3 + payload + padding,
-				s, s->msg_callback_arg);
-
-		dtls1_start_timer(s);
-		s->tlsext_hb_pending = 1;
-		}
-
-	OPENSSL_free(buf);
-
-	return ret;
-	}
-#endif