Delete bundled copy of OpenSSL and replace with README.

openssl/ssl/d1_pkt.c

Index: openssl/ssl/d1_pkt.c
diff --git a/openssl/ssl/d1_pkt.c b/openssl/ssl/d1_pkt.c
deleted file mode 100644
index 028d48bb46e7843e79327b8b767eeff6af2d1375..0000000000000000000000000000000000000000
--- a/openssl/ssl/d1_pkt.c
+++ /dev/null
@@ -1,1893 +0,0 @@
-/* ssl/d1_pkt.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 <stdio.h>
-#include <errno.h>
-#define USE_SOCKETS
-#include "ssl_locl.h"
-#include <openssl/evp.h>
-#include <openssl/buffer.h>
-#include <openssl/pqueue.h>
-#include <openssl/rand.h>
-
-/* mod 128 saturating subtract of two 64-bit values in big-endian order */
-static int satsub64be(const unsigned char *v1,const unsigned char *v2)
-{	int ret,sat,brw,i;
-
-	if (sizeof(long) == 8) do
-	{	const union { long one; char little; } is_endian = {1};
-		long l;
-
-		if (is_endian.little)			break;
-		/* not reached on little-endians */
-		/* following test is redundant, because input is
-		 * always aligned, but I take no chances... */
-		if (((size_t)v1|(size_t)v2)&0x7)	break;
-
-		l  = *((long *)v1);
-		l -= *((long *)v2);
-		if (l>128)		return 128;
-		else if (l<-128)	return -128;
-		else			return (int)l;
-	} while (0);
-
-	ret = (int)v1[7]-(int)v2[7];
-	sat = 0;
-	brw = ret>>8;	/* brw is either 0 or -1 */
-	if (ret & 0x80)
-	{	for (i=6;i>=0;i--)
-		{	brw += (int)v1[i]-(int)v2[i];
-			sat |= ~brw;
-			brw >>= 8;
-		}
-	}
-	else
-	{	for (i=6;i>=0;i--)
-		{	brw += (int)v1[i]-(int)v2[i];
-			sat |= brw;
-			brw >>= 8;
-		}
-	}
-	brw <<= 8;	/* brw is either 0 or -256 */
-
-	if (sat&0xff)	return brw | 0x80;
-	else		return brw + (ret&0xFF);
-}
-
-static int have_handshake_fragment(SSL *s, int type, unsigned char *buf, 
-	int len, int peek);
-static int dtls1_record_replay_check(SSL *s, DTLS1_BITMAP *bitmap);
-static void dtls1_record_bitmap_update(SSL *s, DTLS1_BITMAP *bitmap);
-static DTLS1_BITMAP *dtls1_get_bitmap(SSL *s, SSL3_RECORD *rr, 
-    unsigned int *is_next_epoch);
-#if 0
-static int dtls1_record_needs_buffering(SSL *s, SSL3_RECORD *rr,
-	unsigned short *priority, unsigned long *offset);
-#endif
-static int dtls1_buffer_record(SSL *s, record_pqueue *q,
-	unsigned char *priority);
-static int dtls1_process_record(SSL *s);
-
-/* copy buffered record into SSL structure */
-static int
-dtls1_copy_record(SSL *s, pitem *item)
-    {
-    DTLS1_RECORD_DATA *rdata;
-
-    rdata = (DTLS1_RECORD_DATA *)item->data;
-    
-    if (s->s3->rbuf.buf != NULL)
-        OPENSSL_free(s->s3->rbuf.buf);
-    
-    s->packet = rdata->packet;
-    s->packet_length = rdata->packet_length;
-    memcpy(&(s->s3->rbuf), &(rdata->rbuf), sizeof(SSL3_BUFFER));
-    memcpy(&(s->s3->rrec), &(rdata->rrec), sizeof(SSL3_RECORD));
-	
-	/* Set proper sequence number for mac calculation */
-	memcpy(&(s->s3->read_sequence[2]), &(rdata->packet[5]), 6);
-    
-    return(1);
-    }
-
-
-static int
-dtls1_buffer_record(SSL *s, record_pqueue *queue, unsigned char *priority)
-	{
-	DTLS1_RECORD_DATA *rdata;
-	pitem *item;
-
-	/* Limit the size of the queue to prevent DOS attacks */
-	if (pqueue_size(queue->q) >= 100)
-		return 0;
-		
-	rdata = OPENSSL_malloc(sizeof(DTLS1_RECORD_DATA));
-	item = pitem_new(priority, rdata);
-	if (rdata == NULL || item == NULL)
-		{
-		if (rdata != NULL) OPENSSL_free(rdata);
-		if (item != NULL) pitem_free(item);
-		
-		SSLerr(SSL_F_DTLS1_BUFFER_RECORD, ERR_R_INTERNAL_ERROR);
-		return(0);
-		}
-	
-	rdata->packet = s->packet;
-	rdata->packet_length = s->packet_length;
-	memcpy(&(rdata->rbuf), &(s->s3->rbuf), sizeof(SSL3_BUFFER));
-	memcpy(&(rdata->rrec), &(s->s3->rrec), sizeof(SSL3_RECORD));
-
-	item->data = rdata;
-
-#ifndef OPENSSL_NO_SCTP
-	/* Store bio_dgram_sctp_rcvinfo struct */
-	if (BIO_dgram_is_sctp(SSL_get_rbio(s)) &&
-	    (s->state == SSL3_ST_SR_FINISHED_A || s->state == SSL3_ST_CR_FINISHED_A)) {
-		BIO_ctrl(SSL_get_rbio(s), BIO_CTRL_DGRAM_SCTP_GET_RCVINFO, sizeof(rdata->recordinfo), &rdata->recordinfo);
-	}
-#endif
-
-	s->packet = NULL;
-	s->packet_length = 0;
-	memset(&(s->s3->rbuf), 0, sizeof(SSL3_BUFFER));
-	memset(&(s->s3->rrec), 0, sizeof(SSL3_RECORD));
-	
-	if (!ssl3_setup_buffers(s))
-		{
-		SSLerr(SSL_F_DTLS1_BUFFER_RECORD, ERR_R_INTERNAL_ERROR);
-		OPENSSL_free(rdata);
-		pitem_free(item);
-		return(0);
-		}
-
-	/* insert should not fail, since duplicates are dropped */
-	if (pqueue_insert(queue->q, item) == NULL)
-		{
-		OPENSSL_free(rdata);
-		pitem_free(item);
-		return(0);
-		}
-
-	return(1);
-	}
-
-
-static int
-dtls1_retrieve_buffered_record(SSL *s, record_pqueue *queue)
-    {
-    pitem *item;
-
-    item = pqueue_pop(queue->q);
-    if (item)
-        {
-        dtls1_copy_record(s, item);
-
-        OPENSSL_free(item->data);
-		pitem_free(item);
-
-        return(1);
-        }
-
-    return(0);
-    }
-
-
-/* retrieve a buffered record that belongs to the new epoch, i.e., not processed 
- * yet */
-#define dtls1_get_unprocessed_record(s) \
-                   dtls1_retrieve_buffered_record((s), \
-                   &((s)->d1->unprocessed_rcds))
-
-/* retrieve a buffered record that belongs to the current epoch, ie, processed */
-#define dtls1_get_processed_record(s) \
-                   dtls1_retrieve_buffered_record((s), \
-                   &((s)->d1->processed_rcds))
-
-static int
-dtls1_process_buffered_records(SSL *s)
-    {
-    pitem *item;
-    
-    item = pqueue_peek(s->d1->unprocessed_rcds.q);
-    if (item)
-        {
-        /* Check if epoch is current. */
-        if (s->d1->unprocessed_rcds.epoch != s->d1->r_epoch)
-            return(1);  /* Nothing to do. */
-        
-        /* Process all the records. */
-        while (pqueue_peek(s->d1->unprocessed_rcds.q))
-            {
-            dtls1_get_unprocessed_record(s);
-            if ( ! dtls1_process_record(s))
-                return(0);
-            dtls1_buffer_record(s, &(s->d1->processed_rcds), 
-                s->s3->rrec.seq_num);
-            }
-        }
-
-    /* sync epoch numbers once all the unprocessed records 
-     * have been processed */
-    s->d1->processed_rcds.epoch = s->d1->r_epoch;
-    s->d1->unprocessed_rcds.epoch = s->d1->r_epoch + 1;
-
-    return(1);
-    }
-
-
-#if 0
-
-static int
-dtls1_get_buffered_record(SSL *s)
-	{
-	pitem *item;
-	PQ_64BIT priority = 
-		(((PQ_64BIT)s->d1->handshake_read_seq) << 32) | 
-		((PQ_64BIT)s->d1->r_msg_hdr.frag_off);
-	
-	if ( ! SSL_in_init(s))  /* if we're not (re)negotiating, 
-							   nothing buffered */
-		return 0;
-
-
-	item = pqueue_peek(s->d1->rcvd_records);
-	if (item && item->priority == priority)
-		{
-		/* Check if we've received the record of interest.  It must be
-		 * a handshake record, since data records as passed up without
-		 * buffering */
-		DTLS1_RECORD_DATA *rdata;
-		item = pqueue_pop(s->d1->rcvd_records);
-		rdata = (DTLS1_RECORD_DATA *)item->data;
-		
-		if (s->s3->rbuf.buf != NULL)
-			OPENSSL_free(s->s3->rbuf.buf);
-		
-		s->packet = rdata->packet;
-		s->packet_length = rdata->packet_length;
-		memcpy(&(s->s3->rbuf), &(rdata->rbuf), sizeof(SSL3_BUFFER));
-		memcpy(&(s->s3->rrec), &(rdata->rrec), sizeof(SSL3_RECORD));
-		
-		OPENSSL_free(item->data);
-		pitem_free(item);
-		
-		/* s->d1->next_expected_seq_num++; */
-		return(1);
-		}
-	
-	return 0;
-	}
-
-#endif
-
-static int
-dtls1_process_record(SSL *s)
-{
-	int i,al;
-	int enc_err;
-	SSL_SESSION *sess;
-	SSL3_RECORD *rr;
-	unsigned int mac_size, orig_len;
-	unsigned char md[EVP_MAX_MD_SIZE];
-
-	rr= &(s->s3->rrec);
-	sess = s->session;
-
-	/* At this point, s->packet_length == SSL3_RT_HEADER_LNGTH + rr->length,
-	 * and we have that many bytes in s->packet
-	 */
-	rr->input= &(s->packet[DTLS1_RT_HEADER_LENGTH]);
-
-	/* ok, we can now read from 's->packet' data into 'rr'
-	 * rr->input points at rr->length bytes, which
-	 * need to be copied into rr->data by either
-	 * the decryption or by the decompression
-	 * When the data is 'copied' into the rr->data buffer,
-	 * rr->input will be pointed at the new buffer */ 
-
-	/* We now have - encrypted [ MAC [ compressed [ plain ] ] ]
-	 * rr->length bytes of encrypted compressed stuff. */
-
-	/* check is not needed I believe */
-	if (rr->length > SSL3_RT_MAX_ENCRYPTED_LENGTH)
-		{
-		al=SSL_AD_RECORD_OVERFLOW;
-		SSLerr(SSL_F_DTLS1_PROCESS_RECORD,SSL_R_ENCRYPTED_LENGTH_TOO_LONG);
-		goto f_err;
-		}
-
-	/* decrypt in place in 'rr->input' */
-	rr->data=rr->input;
-
-	enc_err = s->method->ssl3_enc->enc(s,0);
-	/* enc_err is:
-	 *    0: (in non-constant time) if the record is publically invalid.
-	 *    1: if the padding is valid
-	 *    -1: if the padding is invalid */
-	if (enc_err == 0)
-		{
-		/* For DTLS we simply ignore bad packets. */
-		rr->length = 0;
-		s->packet_length = 0;
-		goto err;
-		}
-
-#ifdef TLS_DEBUG
-printf("dec %d\n",rr->length);
-{ unsigned int z; for (z=0; z<rr->length; z++) printf("%02X%c",rr->data[z],((z+1)%16)?' ':'\n'); }
-printf("\n");
-#endif
-
-	/* r->length is now the compressed data plus mac */
-	if ((sess != NULL) &&
-	    (s->enc_read_ctx != NULL) &&
-	    (EVP_MD_CTX_md(s->read_hash) != NULL))
-		{
-		/* s->read_hash != NULL => mac_size != -1 */
-		unsigned char *mac = NULL;
-		unsigned char mac_tmp[EVP_MAX_MD_SIZE];
-		mac_size=EVP_MD_CTX_size(s->read_hash);
-		OPENSSL_assert(mac_size <= EVP_MAX_MD_SIZE);
-
-		/* kludge: *_cbc_remove_padding passes padding length in rr->type */
-		orig_len = rr->length+((unsigned int)rr->type>>8);
-
-		/* orig_len is the length of the record before any padding was
-		 * removed. This is public information, as is the MAC in use,
-		 * therefore we can safely process the record in a different
-		 * amount of time if it's too short to possibly contain a MAC.
-		 */
-		if (orig_len < mac_size ||
-		    /* CBC records must have a padding length byte too. */
-		    (EVP_CIPHER_CTX_mode(s->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
-		     orig_len < mac_size+1))
-			{
-			al=SSL_AD_DECODE_ERROR;
-			SSLerr(SSL_F_DTLS1_PROCESS_RECORD,SSL_R_LENGTH_TOO_SHORT);
-			goto f_err;
-			}
-
-		if (EVP_CIPHER_CTX_mode(s->enc_read_ctx) == EVP_CIPH_CBC_MODE)
-			{
-			/* We update the length so that the TLS header bytes
-			 * can be constructed correctly but we need to extract
-			 * the MAC in constant time from within the record,
-			 * without leaking the contents of the padding bytes.
-			 * */
-			mac = mac_tmp;
-			ssl3_cbc_copy_mac(mac_tmp, rr, mac_size, orig_len);
-			rr->length -= mac_size;
-			}
-		else
-			{
-			/* In this case there's no padding, so |orig_len|
-			 * equals |rec->length| and we checked that there's
-			 * enough bytes for |mac_size| above. */
-			rr->length -= mac_size;
-			mac = &rr->data[rr->length];
-			}
-
-		i=s->method->ssl3_enc->mac(s,md,0 /* not send */);
-		if (i < 0 || mac == NULL || CRYPTO_memcmp(md, mac, (size_t)mac_size) != 0)
-			enc_err = -1;
-		if (rr->length > SSL3_RT_MAX_COMPRESSED_LENGTH+mac_size)
-			enc_err = -1;
-		}
-
-	if (enc_err < 0)
-		{
-		/* decryption failed, silently discard message */
-		rr->length = 0;
-		s->packet_length = 0;
-		goto err;
-		}
-
-	/* r->length is now just compressed */
-	if (s->expand != NULL)
-		{
-		if (rr->length > SSL3_RT_MAX_COMPRESSED_LENGTH)
-			{
-			al=SSL_AD_RECORD_OVERFLOW;
-			SSLerr(SSL_F_DTLS1_PROCESS_RECORD,SSL_R_COMPRESSED_LENGTH_TOO_LONG);
-			goto f_err;
-			}
-		if (!ssl3_do_uncompress(s))
-			{
-			al=SSL_AD_DECOMPRESSION_FAILURE;
-			SSLerr(SSL_F_DTLS1_PROCESS_RECORD,SSL_R_BAD_DECOMPRESSION);
-			goto f_err;
-			}
-		}
-
-	if (rr->length > SSL3_RT_MAX_PLAIN_LENGTH)
-		{
-		al=SSL_AD_RECORD_OVERFLOW;
-		SSLerr(SSL_F_DTLS1_PROCESS_RECORD,SSL_R_DATA_LENGTH_TOO_LONG);
-		goto f_err;
-		}
-
-	rr->off=0;
-	/* So at this point the following is true
-	 * ssl->s3->rrec.type 	is the type of record
-	 * ssl->s3->rrec.length	== number of bytes in record
-	 * ssl->s3->rrec.off	== offset to first valid byte
-	 * ssl->s3->rrec.data	== where to take bytes from, increment
-	 *			   after use :-).
-	 */
-
-	/* we have pulled in a full packet so zero things */
-	s->packet_length=0;
-	dtls1_record_bitmap_update(s, &(s->d1->bitmap));/* Mark receipt of record. */
-	return(1);
-
-f_err:
-	ssl3_send_alert(s,SSL3_AL_FATAL,al);
-err:
-	return(0);
-}
-
-
-/* Call this to get a new input record.
- * It will return <= 0 if more data is needed, normally due to an error
- * or non-blocking IO.
- * When it finishes, one packet has been decoded and can be found in
- * ssl->s3->rrec.type    - is the type of record
- * ssl->s3->rrec.data, 	 - data
- * ssl->s3->rrec.length, - number of bytes
- */
-/* used only by dtls1_read_bytes */
-int dtls1_get_record(SSL *s)
-	{
-	int ssl_major,ssl_minor;
-	int i,n;
-	SSL3_RECORD *rr;
-	unsigned char *p = NULL;
-	unsigned short version;
-	DTLS1_BITMAP *bitmap;
-	unsigned int is_next_epoch;
-
-	rr= &(s->s3->rrec);
-
-	/* The epoch may have changed.  If so, process all the
-	 * pending records.  This is a non-blocking operation. */
-	dtls1_process_buffered_records(s);
-
-	/* if we're renegotiating, then there may be buffered records */
-	if (dtls1_get_processed_record(s))
-		return 1;
-
-	/* get something from the wire */
-again:
-	/* check if we have the header */
-	if (	(s->rstate != SSL_ST_READ_BODY) ||
-		(s->packet_length < DTLS1_RT_HEADER_LENGTH)) 
-		{
-		n=ssl3_read_n(s, DTLS1_RT_HEADER_LENGTH, s->s3->rbuf.len, 0);
-		/* read timeout is handled by dtls1_read_bytes */
-		if (n <= 0) return(n); /* error or non-blocking */
-
-		/* this packet contained a partial record, dump it */
-		if (s->packet_length != DTLS1_RT_HEADER_LENGTH)
-			{
-			s->packet_length = 0;
-			goto again;
-			}
-
-		s->rstate=SSL_ST_READ_BODY;
-
-		p=s->packet;
-
-		/* Pull apart the header into the DTLS1_RECORD */
-		rr->type= *(p++);
-		ssl_major= *(p++);
-		ssl_minor= *(p++);
-		version=(ssl_major<<8)|ssl_minor;
-
-		/* sequence number is 64 bits, with top 2 bytes = epoch */ 
-		n2s(p,rr->epoch);
-
-		memcpy(&(s->s3->read_sequence[2]), p, 6);
-		p+=6;
-
-		n2s(p,rr->length);
-
-		/* Lets check version */
-		if (!s->first_packet)
-			{
-			if (version != s->version)
-				{
-				/* unexpected version, silently discard */
-				rr->length = 0;
-				s->packet_length = 0;
-				goto again;
-				}
-			}
-
-		if ((version & 0xff00) != (s->version & 0xff00))
-			{
-			/* wrong version, silently discard record */
-			rr->length = 0;
-			s->packet_length = 0;
-			goto again;
-			}
-
-		if (rr->length > SSL3_RT_MAX_ENCRYPTED_LENGTH)
-			{
-			/* record too long, silently discard it */
-			rr->length = 0;
-			s->packet_length = 0;
-			goto again;
-			}
-
-		/* now s->rstate == SSL_ST_READ_BODY */
-		}
-
-	/* s->rstate == SSL_ST_READ_BODY, get and decode the data */
-
-	if (rr->length > s->packet_length-DTLS1_RT_HEADER_LENGTH)
-		{
-		/* now s->packet_length == DTLS1_RT_HEADER_LENGTH */
-		i=rr->length;
-		n=ssl3_read_n(s,i,i,1);
-		if (n <= 0) return(n); /* error or non-blocking io */
-
-		/* this packet contained a partial record, dump it */
-		if ( n != i)
-			{
-			rr->length = 0;
-			s->packet_length = 0;
-			goto again;
-			}
-
-		/* now n == rr->length,
-		 * and s->packet_length == DTLS1_RT_HEADER_LENGTH + rr->length */
-		}
-	s->rstate=SSL_ST_READ_HEADER; /* set state for later operations */
-
-	/* match epochs.  NULL means the packet is dropped on the floor */
-	bitmap = dtls1_get_bitmap(s, rr, &is_next_epoch);
-	if ( bitmap == NULL)
-		{
-		rr->length = 0;
-		s->packet_length = 0;  /* dump this record */
-		goto again;   /* get another record */
-		}
-
-#ifndef OPENSSL_NO_SCTP
-	/* Only do replay check if no SCTP bio */
-	if (!BIO_dgram_is_sctp(SSL_get_rbio(s)))
-  		{
-#endif
-		/* Check whether this is a repeat, or aged record.
-		 * Don't check if we're listening and this message is
-		 * a ClientHello. They can look as if they're replayed,
-		 * since they arrive from different connections and
-		 * would be dropped unnecessarily.
-		 */
-		if (!(s->d1->listen && rr->type == SSL3_RT_HANDSHAKE &&
-		    *p == SSL3_MT_CLIENT_HELLO) &&
-		    !dtls1_record_replay_check(s, bitmap))
-			{
-			rr->length = 0;
-			s->packet_length=0; /* dump this record */
-			goto again;     /* get another record */
-			}
-#ifndef OPENSSL_NO_SCTP
-  		}
-#endif
-
-	/* just read a 0 length packet */
-	if (rr->length == 0) goto again;
-
-	/* If this record is from the next epoch (either HM or ALERT),
-	 * and a handshake is currently in progress, buffer it since it
-	 * cannot be processed at this time. However, do not buffer
-	 * anything while listening.
-	 */
-	if (is_next_epoch)
-		{
-		if ((SSL_in_init(s) || s->in_handshake) && !s->d1->listen)
-			{
-			dtls1_buffer_record(s, &(s->d1->unprocessed_rcds), rr->seq_num);
-			}
-		rr->length = 0;
-		s->packet_length = 0;
-		goto again;
-		}
-
-	if (!dtls1_process_record(s))
-		{
-		rr->length = 0;
-		s->packet_length = 0;  /* dump this record */
-		goto again;   /* get another record */
-		}
-
-	return(1);
-
-	}
-
-/* Return up to 'len' payload bytes received in 'type' records.
- * 'type' is one of the following:
- *
- *   -  SSL3_RT_HANDSHAKE (when ssl3_get_message calls us)
- *   -  SSL3_RT_APPLICATION_DATA (when ssl3_read calls us)
- *   -  0 (during a shutdown, no data has to be returned)
- *
- * If we don't have stored data to work from, read a SSL/TLS record first
- * (possibly multiple records if we still don't have anything to return).
- *
- * This function must handle any surprises the peer may have for us, such as
- * Alert records (e.g. close_notify), ChangeCipherSpec records (not really
- * a surprise, but handled as if it were), or renegotiation requests.
- * Also if record payloads contain fragments too small to process, we store
- * them until there is enough for the respective protocol (the record protocol
- * may use arbitrary fragmentation and even interleaving):
- *     Change cipher spec protocol
- *             just 1 byte needed, no need for keeping anything stored
- *     Alert protocol
- *             2 bytes needed (AlertLevel, AlertDescription)
- *     Handshake protocol
- *             4 bytes needed (HandshakeType, uint24 length) -- we just have
- *             to detect unexpected Client Hello and Hello Request messages
- *             here, anything else is handled by higher layers
- *     Application data protocol
- *             none of our business
- */
-int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
-	{
-	int al,i,j,ret;
-	unsigned int n;
-	SSL3_RECORD *rr;
-	void (*cb)(const SSL *ssl,int type2,int val)=NULL;
-
-	if (s->s3->rbuf.buf == NULL) /* Not initialized yet */
-		if (!ssl3_setup_buffers(s))
-			return(-1);
-
-    /* XXX: check what the second '&& type' is about */
-	if ((type && (type != SSL3_RT_APPLICATION_DATA) && 
-		(type != SSL3_RT_HANDSHAKE) && type) ||
-	    (peek && (type != SSL3_RT_APPLICATION_DATA)))
-		{
-		SSLerr(SSL_F_DTLS1_READ_BYTES, ERR_R_INTERNAL_ERROR);
-		return -1;
-		}
-
-	/* check whether there's a handshake message (client hello?) waiting */
-	if ( (ret = have_handshake_fragment(s, type, buf, len, peek)))
-		return ret;
-
-	/* Now s->d1->handshake_fragment_len == 0 if type == SSL3_RT_HANDSHAKE. */
-
-#ifndef OPENSSL_NO_SCTP
-	/* Continue handshake if it had to be interrupted to read
-	 * app data with SCTP.
-	 */
-	if ((!s->in_handshake && SSL_in_init(s)) ||
-	    (BIO_dgram_is_sctp(SSL_get_rbio(s)) &&
-	     (s->state == DTLS1_SCTP_ST_SR_READ_SOCK || s->state == DTLS1_SCTP_ST_CR_READ_SOCK) &&
-	     s->s3->in_read_app_data != 2))
-#else
-	if (!s->in_handshake && SSL_in_init(s))
-#endif
-		{
-		/* type == SSL3_RT_APPLICATION_DATA */
-		i=s->handshake_func(s);
-		if (i < 0) return(i);
-		if (i == 0)
-			{
-			SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
-			return(-1);
-			}
-		}
-
-start:
-	s->rwstate=SSL_NOTHING;
-
-	/* s->s3->rrec.type	    - is the type of record
-	 * s->s3->rrec.data,    - data
-	 * s->s3->rrec.off,     - offset into 'data' for next read
-	 * s->s3->rrec.length,  - number of bytes. */
-	rr = &(s->s3->rrec);
-
-	/* We are not handshaking and have no data yet,
-	 * so process data buffered during the last handshake
-	 * in advance, if any.
-	 */
-	if (s->state == SSL_ST_OK && rr->length == 0)
-		{
-		pitem *item;
-		item = pqueue_pop(s->d1->buffered_app_data.q);
-		if (item)
-			{
-#ifndef OPENSSL_NO_SCTP
-			/* Restore bio_dgram_sctp_rcvinfo struct */
-			if (BIO_dgram_is_sctp(SSL_get_rbio(s)))
-				{
-				DTLS1_RECORD_DATA *rdata = (DTLS1_RECORD_DATA *) item->data;
-				BIO_ctrl(SSL_get_rbio(s), BIO_CTRL_DGRAM_SCTP_SET_RCVINFO, sizeof(rdata->recordinfo), &rdata->recordinfo);
-				}
-#endif
-
-			dtls1_copy_record(s, item);
-
-			OPENSSL_free(item->data);
-			pitem_free(item);
-			}
-		}
-
-	/* Check for timeout */
-	if (dtls1_handle_timeout(s) > 0)
-		goto start;
-
-	/* get new packet if necessary */
-	if ((rr->length == 0) || (s->rstate == SSL_ST_READ_BODY))
-		{
-		ret=dtls1_get_record(s);
-		if (ret <= 0) 
-			{
-			ret = dtls1_read_failed(s, ret);
-			/* anything other than a timeout is an error */
-			if (ret <= 0)  
-				return(ret);
-			else
-				goto start;
-			}
-		}
-
-	/* we now have a packet which can be read and processed */
-
-	if (s->s3->change_cipher_spec /* set when we receive ChangeCipherSpec,
-	                               * reset by ssl3_get_finished */
-		&& (rr->type != SSL3_RT_HANDSHAKE))
-		{
-		/* We now have application data between CCS and Finished.
-		 * Most likely the packets were reordered on their way, so
-		 * buffer the application data for later processing rather
-		 * than dropping the connection.
-		 */
-		dtls1_buffer_record(s, &(s->d1->buffered_app_data), rr->seq_num);
-		rr->length = 0;
-		goto start;
-		}
-
-	/* If the other end has shut down, throw anything we read away
-	 * (even in 'peek' mode) */
-	if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
-		{
-		rr->length=0;
-		s->rwstate=SSL_NOTHING;
-		return(0);
-		}
-
-
-	if (type == rr->type) /* SSL3_RT_APPLICATION_DATA or SSL3_RT_HANDSHAKE */
-		{
-		/* make sure that we are not getting application data when we
-		 * are doing a handshake for the first time */
-		if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) &&
-			(s->enc_read_ctx == NULL))
-			{
-			al=SSL_AD_UNEXPECTED_MESSAGE;
-			SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_APP_DATA_IN_HANDSHAKE);
-			goto f_err;
-			}
-
-		if (len <= 0) return(len);
-
-		if ((unsigned int)len > rr->length)
-			n = rr->length;
-		else
-			n = (unsigned int)len;
-
-		memcpy(buf,&(rr->data[rr->off]),n);
-		if (!peek)
-			{
-			rr->length-=n;
-			rr->off+=n;
-			if (rr->length == 0)
-				{
-				s->rstate=SSL_ST_READ_HEADER;
-				rr->off=0;
-				}
-			}
-
-#ifndef OPENSSL_NO_SCTP
-			/* We were about to renegotiate but had to read
-			 * belated application data first, so retry.
-			 */
-			if (BIO_dgram_is_sctp(SSL_get_rbio(s)) &&
-			    rr->type == SSL3_RT_APPLICATION_DATA &&
-			    (s->state == DTLS1_SCTP_ST_SR_READ_SOCK || s->state == DTLS1_SCTP_ST_CR_READ_SOCK))
-				{
-				s->rwstate=SSL_READING;
-				BIO_clear_retry_flags(SSL_get_rbio(s));
-				BIO_set_retry_read(SSL_get_rbio(s));
-				}
-
-			/* We might had to delay a close_notify alert because
-			 * of reordered app data. If there was an alert and there
-			 * is no message to read anymore, finally set shutdown.
-			 */
-			if (BIO_dgram_is_sctp(SSL_get_rbio(s)) &&
-			    s->d1->shutdown_received && !BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s)))
-				{
-				s->shutdown |= SSL_RECEIVED_SHUTDOWN;
-				return(0);
-				}
-#endif			
-		return(n);
-		}
-
-
-	/* If we get here, then type != rr->type; if we have a handshake
-	 * message, then it was unexpected (Hello Request or Client Hello). */
-
-	/* In case of record types for which we have 'fragment' storage,
-	 * fill that so that we can process the data at a fixed place.
-	 */
-		{
-		unsigned int k, dest_maxlen = 0;
-		unsigned char *dest = NULL;
-		unsigned int *dest_len = NULL;
-
-		if (rr->type == SSL3_RT_HANDSHAKE)
-			{
-			dest_maxlen = sizeof s->d1->handshake_fragment;
-			dest = s->d1->handshake_fragment;
-			dest_len = &s->d1->handshake_fragment_len;
-			}
-		else if (rr->type == SSL3_RT_ALERT)
-			{
-			dest_maxlen = sizeof(s->d1->alert_fragment);
-			dest = s->d1->alert_fragment;
-			dest_len = &s->d1->alert_fragment_len;
-			}
-#ifndef OPENSSL_NO_HEARTBEATS
-		else if (rr->type == TLS1_RT_HEARTBEAT)
-			{
-			dtls1_process_heartbeat(s);
-
-			/* Exit and notify application to read again */
-			rr->length = 0;
-			s->rwstate=SSL_READING;
-			BIO_clear_retry_flags(SSL_get_rbio(s));
-			BIO_set_retry_read(SSL_get_rbio(s));
-			return(-1);
-			}
-#endif
-		/* else it's a CCS message, or application data or wrong */
-		else if (rr->type != SSL3_RT_CHANGE_CIPHER_SPEC)
-			{
-			/* Application data while renegotiating
-			 * is allowed. Try again reading.
-			 */
-			if (rr->type == SSL3_RT_APPLICATION_DATA)
-				{
-				BIO *bio;
-				s->s3->in_read_app_data=2;
-				bio=SSL_get_rbio(s);
-				s->rwstate=SSL_READING;
-				BIO_clear_retry_flags(bio);
-				BIO_set_retry_read(bio);
-				return(-1);
-				}
-
-			/* Not certain if this is the right error handling */
-			al=SSL_AD_UNEXPECTED_MESSAGE;
-			SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_UNEXPECTED_RECORD);
-			goto f_err;
-			}
-
-		if (dest_maxlen > 0)
-			{
-            /* XDTLS:  In a pathalogical case, the Client Hello
-             *  may be fragmented--don't always expect dest_maxlen bytes */
-			if ( rr->length < dest_maxlen)
-				{
-#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
-				/*
-				 * for normal alerts rr->length is 2, while
-				 * dest_maxlen is 7 if we were to handle this
-				 * non-existing alert...
-				 */
-				FIX ME
-#endif
-				s->rstate=SSL_ST_READ_HEADER;
-				rr->length = 0;
-				goto start;
-				}
-
-			/* now move 'n' bytes: */
-			for ( k = 0; k < dest_maxlen; k++)
-				{
-				dest[k] = rr->data[rr->off++];
-				rr->length--;
-				}
-			*dest_len = dest_maxlen;
-			}
-		}
-
-	/* s->d1->handshake_fragment_len == 12  iff  rr->type == SSL3_RT_HANDSHAKE;
-	 * s->d1->alert_fragment_len == 7      iff  rr->type == SSL3_RT_ALERT.
-	 * (Possibly rr is 'empty' now, i.e. rr->length may be 0.) */
-
-	/* If we are a client, check for an incoming 'Hello Request': */
-	if ((!s->server) &&
-		(s->d1->handshake_fragment_len >= DTLS1_HM_HEADER_LENGTH) &&
-		(s->d1->handshake_fragment[0] == SSL3_MT_HELLO_REQUEST) &&
-		(s->session != NULL) && (s->session->cipher != NULL))
-		{
-		s->d1->handshake_fragment_len = 0;
-
-		if ((s->d1->handshake_fragment[1] != 0) ||
-			(s->d1->handshake_fragment[2] != 0) ||
-			(s->d1->handshake_fragment[3] != 0))
-			{
-			al=SSL_AD_DECODE_ERROR;
-			SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_BAD_HELLO_REQUEST);
-			goto err;
-			}
-
-		/* no need to check sequence number on HELLO REQUEST messages */
-
-		if (s->msg_callback)
-			s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, 
-				s->d1->handshake_fragment, 4, s, s->msg_callback_arg);
-
-		if (SSL_is_init_finished(s) &&
-			!(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) &&
-			!s->s3->renegotiate)
-			{
-			s->new_session = 1;
-			ssl3_renegotiate(s);
-			if (ssl3_renegotiate_check(s))
-				{
-				i=s->handshake_func(s);
-				if (i < 0) return(i);
-				if (i == 0)
-					{
-					SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
-					return(-1);
-					}
-
-				if (!(s->mode & SSL_MODE_AUTO_RETRY))
-					{
-					if (s->s3->rbuf.left == 0) /* no read-ahead left? */
-						{
-						BIO *bio;
-						/* In the case where we try to read application data,
-						 * but we trigger an SSL handshake, we return -1 with
-						 * the retry option set.  Otherwise renegotiation may
-						 * cause nasty problems in the blocking world */
-						s->rwstate=SSL_READING;
-						bio=SSL_get_rbio(s);
-						BIO_clear_retry_flags(bio);
-						BIO_set_retry_read(bio);
-						return(-1);
-						}
-					}
-				}
-			}
-		/* we either finished a handshake or ignored the request,
-		 * now try again to obtain the (application) data we were asked for */
-		goto start;
-		}
-
-	if (s->d1->alert_fragment_len >= DTLS1_AL_HEADER_LENGTH)
-		{
-		int alert_level = s->d1->alert_fragment[0];
-		int alert_descr = s->d1->alert_fragment[1];
-
-		s->d1->alert_fragment_len = 0;
-
-		if (s->msg_callback)
-			s->msg_callback(0, s->version, SSL3_RT_ALERT, 
-				s->d1->alert_fragment, 2, s, s->msg_callback_arg);
-
-		if (s->info_callback != NULL)
-			cb=s->info_callback;
-		else if (s->ctx->info_callback != NULL)
-			cb=s->ctx->info_callback;
-
-		if (cb != NULL)
-			{
-			j = (alert_level << 8) | alert_descr;
-			cb(s, SSL_CB_READ_ALERT, j);
-			}
-
-		if (alert_level == 1) /* warning */
-			{
-			s->s3->warn_alert = alert_descr;
-			if (alert_descr == SSL_AD_CLOSE_NOTIFY)
-				{
-#ifndef OPENSSL_NO_SCTP
-				/* With SCTP and streams the socket may deliver app data
-				 * after a close_notify alert. We have to check this
-				 * first so that nothing gets discarded.
-				 */
-				if (BIO_dgram_is_sctp(SSL_get_rbio(s)) &&
-					BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s)))
-					{
-					s->d1->shutdown_received = 1;
-					s->rwstate=SSL_READING;
-					BIO_clear_retry_flags(SSL_get_rbio(s));
-					BIO_set_retry_read(SSL_get_rbio(s));
-					return -1;
-					}
-#endif
-				s->shutdown |= SSL_RECEIVED_SHUTDOWN;
-				return(0);
-				}
-#if 0
-            /* XXX: this is a possible improvement in the future */
-			/* now check if it's a missing record */
-			if (alert_descr == DTLS1_AD_MISSING_HANDSHAKE_MESSAGE)
-				{
-				unsigned short seq;
-				unsigned int frag_off;
-				unsigned char *p = &(s->d1->alert_fragment[2]);
-
-				n2s(p, seq);
-				n2l3(p, frag_off);
-
-				dtls1_retransmit_message(s,
-										 dtls1_get_queue_priority(frag->msg_header.seq, 0),
-										 frag_off, &found);
-				if ( ! found  && SSL_in_init(s))
-					{
-					/* fprintf( stderr,"in init = %d\n", SSL_in_init(s)); */
-					/* requested a message not yet sent, 
-					   send an alert ourselves */
-					ssl3_send_alert(s,SSL3_AL_WARNING,
-						DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
-					}
-				}
-#endif
-			}
-		else if (alert_level == 2) /* fatal */
-			{
-			char tmp[16];
-
-			s->rwstate=SSL_NOTHING;
-			s->s3->fatal_alert = alert_descr;
-			SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_AD_REASON_OFFSET + alert_descr);
-			BIO_snprintf(tmp,sizeof tmp,"%d",alert_descr);
-			ERR_add_error_data(2,"SSL alert number ",tmp);
-			s->shutdown|=SSL_RECEIVED_SHUTDOWN;
-			SSL_CTX_remove_session(s->ctx,s->session);
-			return(0);
-			}
-		else
-			{
-			al=SSL_AD_ILLEGAL_PARAMETER;
-			SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_UNKNOWN_ALERT_TYPE);
-			goto f_err;
-			}
-
-		goto start;
-		}
-
-	if (s->shutdown & SSL_SENT_SHUTDOWN) /* but we have not received a shutdown */
-		{
-		s->rwstate=SSL_NOTHING;
-		rr->length=0;
-		return(0);
-		}
-
-	if (rr->type == SSL3_RT_CHANGE_CIPHER_SPEC)
-		{
-		struct ccs_header_st ccs_hdr;
-		unsigned int ccs_hdr_len = DTLS1_CCS_HEADER_LENGTH;
-
-		dtls1_get_ccs_header(rr->data, &ccs_hdr);
-
-		if (s->version == DTLS1_BAD_VER)
-			ccs_hdr_len = 3;
-
-		/* 'Change Cipher Spec' is just a single byte, so we know
-		 * exactly what the record payload has to look like */
-		/* XDTLS: check that epoch is consistent */
-		if (	(rr->length != ccs_hdr_len) || 
-			(rr->off != 0) || (rr->data[0] != SSL3_MT_CCS))
-			{
-			i=SSL_AD_ILLEGAL_PARAMETER;
-			SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_BAD_CHANGE_CIPHER_SPEC);
-			goto err;
-			}
-
-		rr->length=0;
-
-		if (s->msg_callback)
-			s->msg_callback(0, s->version, SSL3_RT_CHANGE_CIPHER_SPEC, 
-				rr->data, 1, s, s->msg_callback_arg);
-
-		/* We can't process a CCS now, because previous handshake
-		 * messages are still missing, so just drop it.
-		 */
-		if (!s->d1->change_cipher_spec_ok)
-			{
-			goto start;
-			}
-
-		s->d1->change_cipher_spec_ok = 0;
-
-		s->s3->change_cipher_spec=1;
-		if (!ssl3_do_change_cipher_spec(s))
-			goto err;
-
-		/* do this whenever CCS is processed */
-		dtls1_reset_seq_numbers(s, SSL3_CC_READ);
-
-		if (s->version == DTLS1_BAD_VER)
-			s->d1->handshake_read_seq++;
-
-#ifndef OPENSSL_NO_SCTP
-		/* Remember that a CCS has been received,
-		 * so that an old key of SCTP-Auth can be
-		 * deleted when a CCS is sent. Will be ignored
-		 * if no SCTP is used
-		 */
-		BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD, 1, NULL);
-#endif
-
-		goto start;
-		}
-
-	/* Unexpected handshake message (Client Hello, or protocol violation) */
-	if ((s->d1->handshake_fragment_len >= DTLS1_HM_HEADER_LENGTH) && 
-		!s->in_handshake)
-		{
-		struct hm_header_st msg_hdr;
-		
-		/* this may just be a stale retransmit */
-		dtls1_get_message_header(rr->data, &msg_hdr);
-		if( rr->epoch != s->d1->r_epoch)
-			{
-			rr->length = 0;
-			goto start;
-			}
-
-		/* If we are server, we may have a repeated FINISHED of the
-		 * client here, then retransmit our CCS and FINISHED.
-		 */
-		if (msg_hdr.type == SSL3_MT_FINISHED)
-			{
-			if (dtls1_check_timeout_num(s) < 0)
-				return -1;
-
-			dtls1_retransmit_buffered_messages(s);
-			rr->length = 0;
-			goto start;
-			}
-
-		if (((s->state&SSL_ST_MASK) == SSL_ST_OK) &&
-			!(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS))
-			{
-#if 0 /* worked only because C operator preferences are not as expected (and
-       * because this is not really needed for clients except for detecting
-       * protocol violations): */
-			s->state=SSL_ST_BEFORE|(s->server)
-				?SSL_ST_ACCEPT
-				:SSL_ST_CONNECT;
-#else
-			s->state = s->server ? SSL_ST_ACCEPT : SSL_ST_CONNECT;
-#endif
-			s->renegotiate=1;
-			s->new_session=1;
-			}
-		i=s->handshake_func(s);
-		if (i < 0) return(i);
-		if (i == 0)
-			{
-			SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
-			return(-1);
-			}
-
-		if (!(s->mode & SSL_MODE_AUTO_RETRY))
-			{
-			if (s->s3->rbuf.left == 0) /* no read-ahead left? */
-				{
-				BIO *bio;
-				/* In the case where we try to read application data,
-				 * but we trigger an SSL handshake, we return -1 with
-				 * the retry option set.  Otherwise renegotiation may
-				 * cause nasty problems in the blocking world */
-				s->rwstate=SSL_READING;
-				bio=SSL_get_rbio(s);
-				BIO_clear_retry_flags(bio);
-				BIO_set_retry_read(bio);
-				return(-1);
-				}
-			}
-		goto start;
-		}
-
-	switch (rr->type)
-		{
-	default:
-#ifndef OPENSSL_NO_TLS
-		/* TLS just ignores unknown message types */
-		if (s->version == TLS1_VERSION)
-			{
-			rr->length = 0;
-			goto start;
-			}
-#endif
-		al=SSL_AD_UNEXPECTED_MESSAGE;
-		SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_UNEXPECTED_RECORD);
-		goto f_err;
-	case SSL3_RT_CHANGE_CIPHER_SPEC:
-	case SSL3_RT_ALERT:
-	case SSL3_RT_HANDSHAKE:
-		/* we already handled all of these, with the possible exception
-		 * of SSL3_RT_HANDSHAKE when s->in_handshake is set, but that
-		 * should not happen when type != rr->type */
-		al=SSL_AD_UNEXPECTED_MESSAGE;
-		SSLerr(SSL_F_DTLS1_READ_BYTES,ERR_R_INTERNAL_ERROR);
-		goto f_err;
-	case SSL3_RT_APPLICATION_DATA:
-		/* At this point, we were expecting handshake data,
-		 * but have application data.  If the library was
-		 * running inside ssl3_read() (i.e. in_read_app_data
-		 * is set) and it makes sense to read application data
-		 * at this point (session renegotiation not yet started),
-		 * we will indulge it.
-		 */
-		if (s->s3->in_read_app_data &&
-			(s->s3->total_renegotiations != 0) &&
-			((
-				(s->state & SSL_ST_CONNECT) &&
-				(s->state >= SSL3_ST_CW_CLNT_HELLO_A) &&
-				(s->state <= SSL3_ST_CR_SRVR_HELLO_A)
-				) || (
-					(s->state & SSL_ST_ACCEPT) &&
-					(s->state <= SSL3_ST_SW_HELLO_REQ_A) &&
-					(s->state >= SSL3_ST_SR_CLNT_HELLO_A)
-					)
-				))
-			{
-			s->s3->in_read_app_data=2;
-			return(-1);
-			}
-		else
-			{
-			al=SSL_AD_UNEXPECTED_MESSAGE;
-			SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_UNEXPECTED_RECORD);
-			goto f_err;
-			}
-		}
-	/* not reached */
-
-f_err:
-	ssl3_send_alert(s,SSL3_AL_FATAL,al);
-err:
-	return(-1);
-	}
-
-int
-dtls1_write_app_data_bytes(SSL *s, int type, const void *buf_, int len)
-	{
-	int i;
-
-#ifndef OPENSSL_NO_SCTP
-		/* Check if we have to continue an interrupted handshake
-		 * for reading belated app data with SCTP.
-		 */
-		if ((SSL_in_init(s) && !s->in_handshake) ||
-		    (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
-		     (s->state == DTLS1_SCTP_ST_SR_READ_SOCK || s->state == DTLS1_SCTP_ST_CR_READ_SOCK)))
-#else
-		if (SSL_in_init(s) && !s->in_handshake)
-#endif
-		{
-		i=s->handshake_func(s);
-		if (i < 0) return(i);
-		if (i == 0)
-			{
-			SSLerr(SSL_F_DTLS1_WRITE_APP_DATA_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
-			return -1;
-			}
-		}
-
-	if (len > SSL3_RT_MAX_PLAIN_LENGTH)
-		{
-			SSLerr(SSL_F_DTLS1_WRITE_APP_DATA_BYTES,SSL_R_DTLS_MESSAGE_TOO_BIG);
-			return -1;
-		}
-
-	i = dtls1_write_bytes(s, type, buf_, len);
-	return i;
-	}
-
-
-	/* this only happens when a client hello is received and a handshake 
-	 * is started. */
-static int
-have_handshake_fragment(SSL *s, int type, unsigned char *buf, 
-	int len, int peek)
-	{
-	
-	if ((type == SSL3_RT_HANDSHAKE) && (s->d1->handshake_fragment_len > 0))
-		/* (partially) satisfy request from storage */
-		{
-		unsigned char *src = s->d1->handshake_fragment;
-		unsigned char *dst = buf;
-		unsigned int k,n;
-		
-		/* peek == 0 */
-		n = 0;
-		while ((len > 0) && (s->d1->handshake_fragment_len > 0))
-			{
-			*dst++ = *src++;
-			len--; s->d1->handshake_fragment_len--;
-			n++;
-			}
-		/* move any remaining fragment bytes: */
-		for (k = 0; k < s->d1->handshake_fragment_len; k++)
-			s->d1->handshake_fragment[k] = *src++;
-		return n;
-		}
-	
-	return 0;
-	}
-
-
-
-
-/* Call this to write data in records of type 'type'
- * It will return <= 0 if not all data has been sent or non-blocking IO.
- */
-int dtls1_write_bytes(SSL *s, int type, const void *buf, int len)
-	{
-	int i;
-
-	OPENSSL_assert(len <= SSL3_RT_MAX_PLAIN_LENGTH);
-	s->rwstate=SSL_NOTHING;
-	i=do_dtls1_write(s, type, buf, len, 0);
-	return i;
-	}
-
-int do_dtls1_write(SSL *s, int type, const unsigned char *buf, unsigned int len, int create_empty_fragment)
-	{
-	unsigned char *p,*pseq;
-	int i,mac_size,clear=0;
-	int prefix_len = 0;
-	SSL3_RECORD *wr;
-	SSL3_BUFFER *wb;
-	SSL_SESSION *sess;
-	int bs;
-
-	/* first check if there is a SSL3_BUFFER still being written
-	 * out.  This will happen with non blocking IO */
-	if (s->s3->wbuf.left != 0)
-		{
-		OPENSSL_assert(0); /* XDTLS:  want to see if we ever get here */
-		return(ssl3_write_pending(s,type,buf,len));
-		}
-
-	/* If we have an alert to send, lets send it */
-	if (s->s3->alert_dispatch)
-		{
-		i=s->method->ssl_dispatch_alert(s);
-		if (i <= 0)
-			return(i);
-		/* if it went, fall through and send more stuff */
-		}
-
-	if (len == 0 && !create_empty_fragment)
-		return 0;
-
-	wr= &(s->s3->wrec);
-	wb= &(s->s3->wbuf);
-	sess=s->session;
-
-	if (	(sess == NULL) ||
-		(s->enc_write_ctx == NULL) ||
-		(EVP_MD_CTX_md(s->write_hash) == NULL))
-		clear=1;
-
-	if (clear)
-		mac_size=0;
-	else
-		{
-		mac_size=EVP_MD_CTX_size(s->write_hash);
-		if (mac_size < 0)
-			goto err;
-		}
-
-	/* DTLS implements explicit IV, so no need for empty fragments */
-#if 0
-	/* 'create_empty_fragment' is true only when this function calls itself */
-	if (!clear && !create_empty_fragment && !s->s3->empty_fragment_done
-	    && SSL_version(s) != DTLS1_VERSION && SSL_version(s) != DTLS1_BAD_VER)
-		{
-		/* countermeasure against known-IV weakness in CBC ciphersuites
-		 * (see http://www.openssl.org/~bodo/tls-cbc.txt) 
-		 */
-
-		if (s->s3->need_empty_fragments && type == SSL3_RT_APPLICATION_DATA)
-			{
-			/* recursive function call with 'create_empty_fragment' set;
-			 * this prepares and buffers the data for an empty fragment
-			 * (these 'prefix_len' bytes are sent out later
-			 * together with the actual payload) */
-			prefix_len = s->method->do_ssl_write(s, type, buf, 0, 1);
-			if (prefix_len <= 0)
-				goto err;
-
-			if (s->s3->wbuf.len < (size_t)prefix_len + SSL3_RT_MAX_PACKET_SIZE)
-				{
-				/* insufficient space */
-				SSLerr(SSL_F_DO_DTLS1_WRITE, ERR_R_INTERNAL_ERROR);
-				goto err;
-				}
-			}
-		
-		s->s3->empty_fragment_done = 1;
-		}
-#endif
-	p = wb->buf + prefix_len;
-
-	/* write the header */
-
-	*(p++)=type&0xff;
-	wr->type=type;
-
-	*(p++)=(s->version>>8);
-	*(p++)=s->version&0xff;
-
-	/* field where we are to write out packet epoch, seq num and len */
-	pseq=p; 
-	p+=10;
-
-	/* lets setup the record stuff. */
-
-	/* Make space for the explicit IV in case of CBC.
-	 * (this is a bit of a boundary violation, but what the heck).
-	 */
-	if ( s->enc_write_ctx && 
-		(EVP_CIPHER_mode( s->enc_write_ctx->cipher ) & EVP_CIPH_CBC_MODE))
-		bs = EVP_CIPHER_block_size(s->enc_write_ctx->cipher);
-	else
-		bs = 0;
-
-	wr->data=p + bs;  /* make room for IV in case of CBC */
-	wr->length=(int)len;
-	wr->input=(unsigned char *)buf;
-
-	/* we now 'read' from wr->input, wr->length bytes into
-	 * wr->data */
-
-	/* first we compress */
-	if (s->compress != NULL)
-		{
-		if (!ssl3_do_compress(s))
-			{
-			SSLerr(SSL_F_DO_DTLS1_WRITE,SSL_R_COMPRESSION_FAILURE);
-			goto err;
-			}
-		}
-	else
-		{
-		memcpy(wr->data,wr->input,wr->length);
-		wr->input=wr->data;
-		}
-
-	/* we should still have the output to wr->data and the input
-	 * from wr->input.  Length should be wr->length.
-	 * wr->data still points in the wb->buf */
-
-	if (mac_size != 0)
-		{
-		if(s->method->ssl3_enc->mac(s,&(p[wr->length + bs]),1) < 0)
-			goto err;
-		wr->length+=mac_size;
-		}
-
-	/* this is true regardless of mac size */
-	wr->input=p;
-	wr->data=p;
-
-
-	/* ssl3_enc can only have an error on read */
-	if (bs)	/* bs != 0 in case of CBC */
-		{
-		RAND_pseudo_bytes(p,bs);
-		/* master IV and last CBC residue stand for
-		 * the rest of randomness */
-		wr->length += bs;
-		}
-
-	s->method->ssl3_enc->enc(s,1);
-
-	/* record length after mac and block padding */
-/*	if (type == SSL3_RT_APPLICATION_DATA ||
-	(type == SSL3_RT_ALERT && ! SSL_in_init(s))) */
-	
-	/* there's only one epoch between handshake and app data */
-	
-	s2n(s->d1->w_epoch, pseq);
-
-	/* XDTLS: ?? */
-/*	else
-	s2n(s->d1->handshake_epoch, pseq); */
-
-	memcpy(pseq, &(s->s3->write_sequence[2]), 6);
-	pseq+=6;
-	s2n(wr->length,pseq);
-
-	/* we should now have
-	 * wr->data pointing to the encrypted data, which is
-	 * wr->length long */
-	wr->type=type; /* not needed but helps for debugging */
-	wr->length+=DTLS1_RT_HEADER_LENGTH;
-
-#if 0  /* this is now done at the message layer */
-	/* buffer the record, making it easy to handle retransmits */
-	if ( type == SSL3_RT_HANDSHAKE || type == SSL3_RT_CHANGE_CIPHER_SPEC)
-		dtls1_buffer_record(s, wr->data, wr->length, 
-			*((PQ_64BIT *)&(s->s3->write_sequence[0])));
-#endif
-
-	ssl3_record_sequence_update(&(s->s3->write_sequence[0]));
-
-	if (create_empty_fragment)
-		{
-		/* we are in a recursive call;
-		 * just return the length, don't write out anything here
-		 */
-		return wr->length;
-		}
-
-	/* now let's set up wb */
-	wb->left = prefix_len + wr->length;
-	wb->offset = 0;
-
-	/* memorize arguments so that ssl3_write_pending can detect bad write retries later */
-	s->s3->wpend_tot=len;
-	s->s3->wpend_buf=buf;
-	s->s3->wpend_type=type;
-	s->s3->wpend_ret=len;
-
-	/* we now just need to write the buffer */
-	return ssl3_write_pending(s,type,buf,len);
-err:
-	return -1;
-	}
-
-
-
-static int dtls1_record_replay_check(SSL *s, DTLS1_BITMAP *bitmap)
-	{
-	int cmp;
-	unsigned int shift;
-	const unsigned char *seq = s->s3->read_sequence;
-
-	cmp = satsub64be(seq,bitmap->max_seq_num);
-	if (cmp > 0)
-		{
-		memcpy (s->s3->rrec.seq_num,seq,8);
-		return 1; /* this record in new */
-		}
-	shift = -cmp;
-	if (shift >= sizeof(bitmap->map)*8)
-		return 0; /* stale, outside the window */
-	else if (bitmap->map & (1UL<<shift))
-		return 0; /* record previously received */
-
-	memcpy (s->s3->rrec.seq_num,seq,8);
-	return 1;
-	}
-
-
-static void dtls1_record_bitmap_update(SSL *s, DTLS1_BITMAP *bitmap)
-	{
-	int cmp;
-	unsigned int shift;
-	const unsigned char *seq = s->s3->read_sequence;
-
-	cmp = satsub64be(seq,bitmap->max_seq_num);
-	if (cmp > 0)
-		{
-		shift = cmp;
-		if (shift < sizeof(bitmap->map)*8)
-			bitmap->map <<= shift, bitmap->map |= 1UL;
-		else
-			bitmap->map = 1UL;
-		memcpy(bitmap->max_seq_num,seq,8);
-		}
-	else	{
-		shift = -cmp;
-		if (shift < sizeof(bitmap->map)*8)
-			bitmap->map |= 1UL<<shift;
-		}
-	}
-
-
-int dtls1_dispatch_alert(SSL *s)
-	{
-	int i,j;
-	void (*cb)(const SSL *ssl,int type,int val)=NULL;
-	unsigned char buf[DTLS1_AL_HEADER_LENGTH];
-	unsigned char *ptr = &buf[0];
-
-	s->s3->alert_dispatch=0;
-
-	memset(buf, 0x00, sizeof(buf));
-	*ptr++ = s->s3->send_alert[0];
-	*ptr++ = s->s3->send_alert[1];
-
-#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
-	if (s->s3->send_alert[1] == DTLS1_AD_MISSING_HANDSHAKE_MESSAGE)
-		{	
-		s2n(s->d1->handshake_read_seq, ptr);
-#if 0
-		if ( s->d1->r_msg_hdr.frag_off == 0)  /* waiting for a new msg */
-
-		else
-			s2n(s->d1->r_msg_hdr.seq, ptr); /* partial msg read */
-#endif
-
-#if 0
-		fprintf(stderr, "s->d1->handshake_read_seq = %d, s->d1->r_msg_hdr.seq = %d\n",s->d1->handshake_read_seq,s->d1->r_msg_hdr.seq);
-#endif
-		l2n3(s->d1->r_msg_hdr.frag_off, ptr);
-		}
-#endif
-
-	i = do_dtls1_write(s, SSL3_RT_ALERT, &buf[0], sizeof(buf), 0);
-	if (i <= 0)
-		{
-		s->s3->alert_dispatch=1;
-		/* fprintf( stderr, "not done with alert\n" ); */
-		}
-	else
-		{
-		if (s->s3->send_alert[0] == SSL3_AL_FATAL
-#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
-		    || s->s3->send_alert[1] == DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
-#endif
-		    )
-			(void)BIO_flush(s->wbio);
-
-		if (s->msg_callback)
-			s->msg_callback(1, s->version, SSL3_RT_ALERT, s->s3->send_alert, 
-				2, s, s->msg_callback_arg);
-
-		if (s->info_callback != NULL)
-			cb=s->info_callback;
-		else if (s->ctx->info_callback != NULL)
-			cb=s->ctx->info_callback;
-
-		if (cb != NULL)
-			{
-			j=(s->s3->send_alert[0]<<8)|s->s3->send_alert[1];
-			cb(s,SSL_CB_WRITE_ALERT,j);
-			}
-		}
-	return(i);
-	}
-
-
-static DTLS1_BITMAP *
-dtls1_get_bitmap(SSL *s, SSL3_RECORD *rr, unsigned int *is_next_epoch)
-    {
-    
-    *is_next_epoch = 0;
-
-    /* In current epoch, accept HM, CCS, DATA, & ALERT */
-    if (rr->epoch == s->d1->r_epoch)
-        return &s->d1->bitmap;
-
-    /* Only HM and ALERT messages can be from the next epoch */
-    else if (rr->epoch == (unsigned long)(s->d1->r_epoch + 1) &&
-        (rr->type == SSL3_RT_HANDSHAKE ||
-            rr->type == SSL3_RT_ALERT))
-        {
-        *is_next_epoch = 1;
-        return &s->d1->next_bitmap;
-        }
-
-    return NULL;
-    }
-
-#if 0
-static int
-dtls1_record_needs_buffering(SSL *s, SSL3_RECORD *rr, unsigned short *priority,
-	unsigned long *offset)
-	{
-
-	/* alerts are passed up immediately */
-	if ( rr->type == SSL3_RT_APPLICATION_DATA ||
-		rr->type == SSL3_RT_ALERT)
-		return 0;
-
-	/* Only need to buffer if a handshake is underway.
-	 * (this implies that Hello Request and Client Hello are passed up
-	 * immediately) */
-	if ( SSL_in_init(s))
-		{
-		unsigned char *data = rr->data;
-		/* need to extract the HM/CCS sequence number here */
-		if ( rr->type == SSL3_RT_HANDSHAKE ||
-			rr->type == SSL3_RT_CHANGE_CIPHER_SPEC)
-			{
-			unsigned short seq_num;
-			struct hm_header_st msg_hdr;
-			struct ccs_header_st ccs_hdr;
-
-			if ( rr->type == SSL3_RT_HANDSHAKE)
-				{
-				dtls1_get_message_header(data, &msg_hdr);
-				seq_num = msg_hdr.seq;
-				*offset = msg_hdr.frag_off;
-				}
-			else
-				{
-				dtls1_get_ccs_header(data, &ccs_hdr);
-				seq_num = ccs_hdr.seq;
-				*offset = 0;
-				}
-				
-			/* this is either a record we're waiting for, or a
-			 * retransmit of something we happened to previously 
-			 * receive (higher layers will drop the repeat silently */
-			if ( seq_num < s->d1->handshake_read_seq)
-				return 0;
-			if (rr->type == SSL3_RT_HANDSHAKE && 
-				seq_num == s->d1->handshake_read_seq &&
-				msg_hdr.frag_off < s->d1->r_msg_hdr.frag_off)
-				return 0;
-			else if ( seq_num == s->d1->handshake_read_seq &&
-				(rr->type == SSL3_RT_CHANGE_CIPHER_SPEC ||
-					msg_hdr.frag_off == s->d1->r_msg_hdr.frag_off))
-				return 0;
-			else
-				{
-				*priority = seq_num;
-				return 1;
-				}
-			}
-		else /* unknown record type */
-			return 0;
-		}
-
-	return 0;
-	}
-#endif
-
-void
-dtls1_reset_seq_numbers(SSL *s, int rw)
-	{
-	unsigned char *seq;
-	unsigned int seq_bytes = sizeof(s->s3->read_sequence);
-
-	if ( rw & SSL3_CC_READ)
-		{
-		seq = s->s3->read_sequence;
-		s->d1->r_epoch++;
-		memcpy(&(s->d1->bitmap), &(s->d1->next_bitmap), sizeof(DTLS1_BITMAP));
-		memset(&(s->d1->next_bitmap), 0x00, sizeof(DTLS1_BITMAP));
-		}
-	else
-		{
-		seq = s->s3->write_sequence;
-		memcpy(s->d1->last_write_sequence, seq, sizeof(s->s3->write_sequence));
-		s->d1->w_epoch++;
-		}
-
-	memset(seq, 0x00, seq_bytes);
-	}