--- /dev/null
+/* 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
projects / cassiopeia.git / blobdiff