223 lines
7.1 KiB
C
Executable File
223 lines
7.1 KiB
C
Executable File
/* $OpenBSD: dtls_locl.h,v 1.10 2021/10/23 13:45:44 jsing Exp $ */
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/*
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* DTLS implementation written by Nagendra Modadugu
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* (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
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*/
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/* ====================================================================
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* Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#ifndef HEADER_DTLS_LOCL_H
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#define HEADER_DTLS_LOCL_H
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#include <sys/time.h>
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#include <openssl/dtls1.h>
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#include "ssl_locl.h"
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__BEGIN_HIDDEN_DECLS
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typedef struct dtls1_bitmap_st {
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unsigned long map; /* track 32 packets on 32-bit systems
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and 64 - on 64-bit systems */
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unsigned char max_seq_num[8]; /* max record number seen so far,
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64-bit value in big-endian
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encoding */
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} DTLS1_BITMAP;
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struct dtls1_retransmit_state {
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SSL_SESSION *session;
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unsigned short epoch;
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};
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struct hm_header_st {
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unsigned char type;
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unsigned long msg_len;
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unsigned short seq;
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unsigned long frag_off;
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unsigned long frag_len;
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unsigned int is_ccs;
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struct dtls1_retransmit_state saved_retransmit_state;
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};
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struct dtls1_timeout_st {
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/* Number of read timeouts so far */
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unsigned int read_timeouts;
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/* Number of write timeouts so far */
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unsigned int write_timeouts;
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/* Number of alerts received so far */
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unsigned int num_alerts;
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};
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struct _pqueue;
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typedef struct record_pqueue_st {
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unsigned short epoch;
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struct _pqueue *q;
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} record_pqueue;
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typedef struct hm_fragment_st {
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struct hm_header_st msg_header;
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unsigned char *fragment;
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unsigned char *reassembly;
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} hm_fragment;
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typedef struct dtls1_record_data_internal_st {
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unsigned char *packet;
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unsigned int packet_length;
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SSL3_BUFFER_INTERNAL rbuf;
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SSL3_RECORD_INTERNAL rrec;
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} DTLS1_RECORD_DATA_INTERNAL;
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struct dtls1_state_st {
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/* Buffered (sent) handshake records */
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struct _pqueue *sent_messages;
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/* Indicates when the last handshake msg or heartbeat sent will timeout */
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struct timeval next_timeout;
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/* Timeout duration */
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unsigned short timeout_duration;
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unsigned int send_cookie;
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unsigned char cookie[DTLS1_COOKIE_LENGTH];
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unsigned char rcvd_cookie[DTLS1_COOKIE_LENGTH];
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unsigned int cookie_len;
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/* records being received in the current epoch */
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DTLS1_BITMAP bitmap;
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/* renegotiation starts a new set of sequence numbers */
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DTLS1_BITMAP next_bitmap;
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/* handshake message numbers */
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unsigned short handshake_write_seq;
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unsigned short next_handshake_write_seq;
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unsigned short handshake_read_seq;
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/* Received handshake records (unprocessed) */
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record_pqueue unprocessed_rcds;
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/* Buffered handshake messages */
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struct _pqueue *buffered_messages;
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/* Buffered application records.
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* Only for records between CCS and Finished
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* to prevent either protocol violation or
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* unnecessary message loss.
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*/
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record_pqueue buffered_app_data;
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/* Is set when listening for new connections with dtls1_listen() */
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unsigned int listen;
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unsigned int mtu; /* max DTLS packet size */
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struct hm_header_st w_msg_hdr;
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struct hm_header_st r_msg_hdr;
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struct dtls1_timeout_st timeout;
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unsigned int retransmitting;
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unsigned int change_cipher_spec_ok;
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};
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int dtls1_do_write(SSL *s, int type);
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int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek);
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void dtls1_set_message_header(SSL *s, unsigned char mt, unsigned long len,
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unsigned long frag_off, unsigned long frag_len);
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void dtls1_set_message_header_int(SSL *s, unsigned char mt,
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unsigned long len, unsigned short seq_num, unsigned long frag_off,
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unsigned long frag_len);
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int do_dtls1_write(SSL *s, int type, const unsigned char *buf,
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unsigned int len);
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int dtls1_write_app_data_bytes(SSL *s, int type, const void *buf, int len);
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int dtls1_write_bytes(SSL *s, int type, const void *buf, int len);
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int dtls1_read_failed(SSL *s, int code);
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int dtls1_buffer_message(SSL *s, int ccs);
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int dtls1_retransmit_message(SSL *s, unsigned short seq,
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unsigned long frag_off, int *found);
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int dtls1_get_queue_priority(unsigned short seq, int is_ccs);
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int dtls1_retransmit_buffered_messages(SSL *s);
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void dtls1_clear_record_buffer(SSL *s);
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int dtls1_get_message_header(CBS *header, struct hm_header_st *msg_hdr);
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void dtls1_reset_read_seq_numbers(SSL *s);
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struct timeval* dtls1_get_timeout(SSL *s, struct timeval* timeleft);
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int dtls1_check_timeout_num(SSL *s);
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int dtls1_handle_timeout(SSL *s);
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const SSL_CIPHER *dtls1_get_cipher(unsigned int u);
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void dtls1_start_timer(SSL *s);
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void dtls1_stop_timer(SSL *s);
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int dtls1_is_timer_expired(SSL *s);
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void dtls1_double_timeout(SSL *s);
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unsigned int dtls1_min_mtu(void);
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int dtls1_new(SSL *s);
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void dtls1_free(SSL *s);
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void dtls1_clear(SSL *s);
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long dtls1_ctrl(SSL *s, int cmd, long larg, void *parg);
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int dtls1_get_message(SSL *s, int st1, int stn, int mt, long max);
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int dtls1_get_record(SSL *s);
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__END_HIDDEN_DECLS
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#endif
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