Initial import

1 files changed, 267 insertions, 0 deletions

diff --git a/openssl/ssl/dtls1.h b/openssl/ssl/dtls1.h
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+/* ssl/dtls1.h */
+/* 
+ * DTLS implementation written by Nagendra Modadugu
+ * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.  
+ */
+/* ====================================================================
+ * Copyright (c) 1999-2005 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    openssl-core@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#ifndef HEADER_DTLS1_H 
+#define HEADER_DTLS1_H 
+
+#include <openssl/buffer.h>
+#include <openssl/pqueue.h>
+#ifdef OPENSSL_SYS_VMS
+#include <resource.h>
+#include <sys/timeb.h>
+#endif
+#ifdef OPENSSL_SYS_WIN32
+/* Needed for struct timeval */
+#include <winsock.h>
+#elif defined(OPENSSL_SYS_NETWARE) && !defined(_WINSOCK2API_)
+#include <sys/timeval.h>
+#else
+#include <sys/time.h>
+#endif
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+#define DTLS1_VERSION			0xFEFF
+#define DTLS1_BAD_VER			0x0100
+
+#if 0
+/* this alert description is not specified anywhere... */
+#define DTLS1_AD_MISSING_HANDSHAKE_MESSAGE    110
+#endif
+
+/* lengths of messages */
+#define DTLS1_COOKIE_LENGTH                     256
+
+#define DTLS1_RT_HEADER_LENGTH                  13
+
+#define DTLS1_HM_HEADER_LENGTH                  12
+
+#define DTLS1_HM_BAD_FRAGMENT                   -2
+#define DTLS1_HM_FRAGMENT_RETRY                 -3
+
+#define DTLS1_CCS_HEADER_LENGTH                  1
+
+#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
+#define DTLS1_AL_HEADER_LENGTH                   7
+#else
+#define DTLS1_AL_HEADER_LENGTH                   2
+#endif
+
+
+typedef struct dtls1_bitmap_st
+	{
+	unsigned long map;		/* track 32 packets on 32-bit systems
+					   and 64 - on 64-bit systems */
+	unsigned char max_seq_num[8];	/* max record number seen so far,
+					   64-bit value in big-endian
+					   encoding */
+	} DTLS1_BITMAP;
+
+struct dtls1_retransmit_state
+	{
+	EVP_CIPHER_CTX *enc_write_ctx;	/* cryptographic state */
+	EVP_MD_CTX *write_hash;			/* used for mac generation */
+#ifndef OPENSSL_NO_COMP
+	COMP_CTX *compress;				/* compression */
+#else
+	char *compress;	
+#endif
+	SSL_SESSION *session;
+	unsigned short epoch;
+	};
+
+struct hm_header_st
+	{
+	unsigned char type;
+	unsigned long msg_len;
+	unsigned short seq;
+	unsigned long frag_off;
+	unsigned long frag_len;
+	unsigned int is_ccs;
+	struct dtls1_retransmit_state saved_retransmit_state;
+	};
+
+struct ccs_header_st
+	{
+	unsigned char type;
+	unsigned short seq;
+	};
+
+struct dtls1_timeout_st
+	{
+	/* Number of read timeouts so far */
+	unsigned int read_timeouts;
+	
+	/* Number of write timeouts so far */
+	unsigned int write_timeouts;
+	
+	/* Number of alerts received so far */
+	unsigned int num_alerts;
+	};
+
+typedef struct record_pqueue_st
+	{
+	unsigned short epoch;
+	pqueue q;
+	} record_pqueue;
+
+typedef struct hm_fragment_st
+	{
+	struct hm_header_st msg_header;
+	unsigned char *fragment;
+	unsigned char *reassembly;
+	} hm_fragment;
+
+typedef struct dtls1_state_st
+	{
+	unsigned int send_cookie;
+	unsigned char cookie[DTLS1_COOKIE_LENGTH];
+	unsigned char rcvd_cookie[DTLS1_COOKIE_LENGTH];
+	unsigned int cookie_len;
+
+	/* 
+	 * The current data and handshake epoch.  This is initially
+	 * undefined, and starts at zero once the initial handshake is
+	 * completed 
+	 */
+	unsigned short r_epoch;
+	unsigned short w_epoch;
+
+	/* records being received in the current epoch */
+	DTLS1_BITMAP bitmap;
+
+	/* renegotiation starts a new set of sequence numbers */
+	DTLS1_BITMAP next_bitmap;
+
+	/* handshake message numbers */
+	unsigned short handshake_write_seq;
+	unsigned short next_handshake_write_seq;
+
+	unsigned short handshake_read_seq;
+
+	/* save last sequence number for retransmissions */
+	unsigned char last_write_sequence[8];
+
+	/* Received handshake records (processed and unprocessed) */
+	record_pqueue unprocessed_rcds;
+	record_pqueue processed_rcds;
+
+	/* Buffered handshake messages */
+	pqueue buffered_messages;
+
+	/* Buffered (sent) handshake records */
+	pqueue sent_messages;
+
+	/* Buffered application records.
+	 * Only for records between CCS and Finished
+	 * to prevent either protocol violation or
+	 * unnecessary message loss.
+	 */
+	record_pqueue buffered_app_data;
+
+	/* Is set when listening for new connections with dtls1_listen() */
+	unsigned int listen;
+
+	unsigned int mtu; /* max DTLS packet size */
+
+	struct hm_header_st w_msg_hdr;
+	struct hm_header_st r_msg_hdr;
+
+	struct dtls1_timeout_st timeout;
+
+	/* Indicates when the last handshake msg sent will timeout */
+	struct timeval next_timeout;
+
+	/* Timeout duration */
+	unsigned short timeout_duration;
+
+	/* storage for Alert/Handshake protocol data received but not
+	 * yet processed by ssl3_read_bytes: */
+	unsigned char alert_fragment[DTLS1_AL_HEADER_LENGTH];
+	unsigned int alert_fragment_len;
+	unsigned char handshake_fragment[DTLS1_HM_HEADER_LENGTH];
+	unsigned int handshake_fragment_len;
+
+	unsigned int retransmitting;
+	unsigned int change_cipher_spec_ok;
+
+	} DTLS1_STATE;
+
+typedef struct dtls1_record_data_st
+	{
+	unsigned char *packet;
+	unsigned int   packet_length;
+	SSL3_BUFFER    rbuf;
+	SSL3_RECORD    rrec;
+	} DTLS1_RECORD_DATA;
+
+
+/* Timeout multipliers (timeout slice is defined in apps/timeouts.h */
+#define DTLS1_TMO_READ_COUNT                      2
+#define DTLS1_TMO_WRITE_COUNT                     2
+
+#define DTLS1_TMO_ALERT_COUNT                     12
+
+#ifdef  __cplusplus
+}
+#endif
+#endif
+