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authorcvs2svn <admin@example.com>2022-05-04 18:02:08 +0000
committercvs2svn <admin@example.com>2022-05-04 18:02:08 +0000
commit3c94dc45dfb15483d76c47a128ec352cc0b655ac (patch)
treea7cfb4512c784e9518f1b1c2f4009295b8766ef4 /src/lib/libssl/dtls_locl.h
parentf32cca700e59c0fd1ddd8f1fd4b35a5401be28fe (diff)
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1/* $OpenBSD: dtls_locl.h,v 1.10 2021/10/23 13:45:44 jsing Exp $ */
2/*
3 * DTLS implementation written by Nagendra Modadugu
4 * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
5 */
6/* ====================================================================
7 * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * openssl-core@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 * acknowledgment:
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 *
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
57 *
58 */
59
60#ifndef HEADER_DTLS_LOCL_H
61#define HEADER_DTLS_LOCL_H
62
63#include <sys/time.h>
64
65#include <openssl/dtls1.h>
66
67#include "ssl_locl.h"
68
69__BEGIN_HIDDEN_DECLS
70
71typedef struct dtls1_bitmap_st {
72 unsigned long map; /* track 32 packets on 32-bit systems
73 and 64 - on 64-bit systems */
74 unsigned char max_seq_num[8]; /* max record number seen so far,
75 64-bit value in big-endian
76 encoding */
77} DTLS1_BITMAP;
78
79struct dtls1_retransmit_state {
80 SSL_SESSION *session;
81 unsigned short epoch;
82};
83
84struct hm_header_st {
85 unsigned char type;
86 unsigned long msg_len;
87 unsigned short seq;
88 unsigned long frag_off;
89 unsigned long frag_len;
90 unsigned int is_ccs;
91 struct dtls1_retransmit_state saved_retransmit_state;
92};
93
94struct dtls1_timeout_st {
95 /* Number of read timeouts so far */
96 unsigned int read_timeouts;
97
98 /* Number of write timeouts so far */
99 unsigned int write_timeouts;
100
101 /* Number of alerts received so far */
102 unsigned int num_alerts;
103};
104
105struct _pqueue;
106
107typedef struct record_pqueue_st {
108 unsigned short epoch;
109 struct _pqueue *q;
110} record_pqueue;
111
112typedef struct hm_fragment_st {
113 struct hm_header_st msg_header;
114 unsigned char *fragment;
115 unsigned char *reassembly;
116} hm_fragment;
117
118typedef struct dtls1_record_data_internal_st {
119 unsigned char *packet;
120 unsigned int packet_length;
121 SSL3_BUFFER_INTERNAL rbuf;
122 SSL3_RECORD_INTERNAL rrec;
123} DTLS1_RECORD_DATA_INTERNAL;
124
125struct dtls1_state_st {
126 /* Buffered (sent) handshake records */
127 struct _pqueue *sent_messages;
128
129 /* Indicates when the last handshake msg or heartbeat sent will timeout */
130 struct timeval next_timeout;
131
132 /* Timeout duration */
133 unsigned short timeout_duration;
134
135 unsigned int send_cookie;
136 unsigned char cookie[DTLS1_COOKIE_LENGTH];
137 unsigned char rcvd_cookie[DTLS1_COOKIE_LENGTH];
138 unsigned int cookie_len;
139
140 /* records being received in the current epoch */
141 DTLS1_BITMAP bitmap;
142
143 /* renegotiation starts a new set of sequence numbers */
144 DTLS1_BITMAP next_bitmap;
145
146 /* handshake message numbers */
147 unsigned short handshake_write_seq;
148 unsigned short next_handshake_write_seq;
149
150 unsigned short handshake_read_seq;
151
152 /* Received handshake records (unprocessed) */
153 record_pqueue unprocessed_rcds;
154
155 /* Buffered handshake messages */
156 struct _pqueue *buffered_messages;
157
158 /* Buffered application records.
159 * Only for records between CCS and Finished
160 * to prevent either protocol violation or
161 * unnecessary message loss.
162 */
163 record_pqueue buffered_app_data;
164
165 /* Is set when listening for new connections with dtls1_listen() */
166 unsigned int listen;
167
168 unsigned int mtu; /* max DTLS packet size */
169
170 struct hm_header_st w_msg_hdr;
171 struct hm_header_st r_msg_hdr;
172
173 struct dtls1_timeout_st timeout;
174
175 unsigned int retransmitting;
176 unsigned int change_cipher_spec_ok;
177};
178
179int dtls1_do_write(SSL *s, int type);
180int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek);
181void dtls1_set_message_header(SSL *s, unsigned char mt, unsigned long len,
182 unsigned long frag_off, unsigned long frag_len);
183void dtls1_set_message_header_int(SSL *s, unsigned char mt,
184 unsigned long len, unsigned short seq_num, unsigned long frag_off,
185 unsigned long frag_len);
186
187int do_dtls1_write(SSL *s, int type, const unsigned char *buf,
188 unsigned int len);
189
190int dtls1_write_app_data_bytes(SSL *s, int type, const void *buf, int len);
191int dtls1_write_bytes(SSL *s, int type, const void *buf, int len);
192
193int dtls1_read_failed(SSL *s, int code);
194int dtls1_buffer_message(SSL *s, int ccs);
195int dtls1_retransmit_message(SSL *s, unsigned short seq,
196 unsigned long frag_off, int *found);
197int dtls1_get_queue_priority(unsigned short seq, int is_ccs);
198int dtls1_retransmit_buffered_messages(SSL *s);
199void dtls1_clear_record_buffer(SSL *s);
200int dtls1_get_message_header(CBS *header, struct hm_header_st *msg_hdr);
201void dtls1_reset_read_seq_numbers(SSL *s);
202struct timeval* dtls1_get_timeout(SSL *s, struct timeval* timeleft);
203int dtls1_check_timeout_num(SSL *s);
204int dtls1_handle_timeout(SSL *s);
205const SSL_CIPHER *dtls1_get_cipher(unsigned int u);
206void dtls1_start_timer(SSL *s);
207void dtls1_stop_timer(SSL *s);
208int dtls1_is_timer_expired(SSL *s);
209void dtls1_double_timeout(SSL *s);
210unsigned int dtls1_min_mtu(void);
211
212int dtls1_new(SSL *s);
213void dtls1_free(SSL *s);
214void dtls1_clear(SSL *s);
215long dtls1_ctrl(SSL *s, int cmd, long larg, void *parg);
216
217int dtls1_get_message(SSL *s, int st1, int stn, int mt, long max);
218int dtls1_get_record(SSL *s);
219
220__END_HIDDEN_DECLS
221
222#endif