summaryrefslogtreecommitdiff
path: root/ics-openvpn-stripped/main/openssl/ssl/dtls1.h
blob: 192c5deff98a0ffd970aafc571613666a777367a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
/* ssl/dtls1.h */
/* 
 * DTLS implementation written by Nagendra Modadugu
 * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.  
 */
/* ====================================================================
 * Copyright (c) 1999-2005 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#ifndef HEADER_DTLS1_H
#define HEADER_DTLS1_H

#include <openssl/buffer.h>
#include <openssl/pqueue.h>
#ifdef OPENSSL_SYS_VMS
#include <resource.h>
#include <sys/timeb.h>
#endif
#ifdef OPENSSL_SYS_WIN32
/* Needed for struct timeval */
#include <winsock.h>
#elif defined(OPENSSL_SYS_NETWARE) && !defined(_WINSOCK2API_)
#include <sys/timeval.h>
#else
#if defined(OPENSSL_SYS_VXWORKS)
#include <sys/times.h>
#else
#include <sys/time.h>
#endif
#endif

#ifdef  __cplusplus
extern "C" {
#endif

#define DTLS1_VERSION			0xFEFF
#define DTLS_MAX_VERSION		DTLS1_VERSION

#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

#ifndef OPENSSL_NO_SSL_INTERN

#ifndef OPENSSL_NO_SCTP
#define DTLS1_SCTP_AUTH_LABEL	"EXPORTER_DTLS_OVER_SCTP"
#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 or heartbeat sent will timeout */
	struct timeval next_timeout;

	/* Timeout duration */
	unsigned short timeout_duration;

	/* storage for Alert/Handshake protocol data received but not
	 * yet processed by ssl3_read_bytes: */
	unsigned char alert_fragment[DTLS1_AL_HEADER_LENGTH];
	unsigned int alert_fragment_len;
	unsigned char handshake_fragment[DTLS1_HM_HEADER_LENGTH];
	unsigned int handshake_fragment_len;

	unsigned int retransmitting;
	unsigned int change_cipher_spec_ok;

#ifndef OPENSSL_NO_SCTP
	/* used when SSL_ST_XX_FLUSH is entered */
	int next_state;

	int shutdown_received;
#endif

	} DTLS1_STATE;

typedef struct dtls1_record_data_st
	{
	unsigned char *packet;
	unsigned int   packet_length;
	SSL3_BUFFER    rbuf;
	SSL3_RECORD    rrec;
#ifndef OPENSSL_NO_SCTP
	struct bio_dgram_sctp_rcvinfo recordinfo;
#endif
	} DTLS1_RECORD_DATA;

#endif

/* Timeout multipliers (timeout slice is defined in apps/timeouts.h */
#define DTLS1_TMO_READ_COUNT                      2
#define DTLS1_TMO_WRITE_COUNT                     2

#define DTLS1_TMO_ALERT_COUNT                     12

#ifdef  __cplusplus
}
#endif
#endif