| /* $OpenBSD: dtls1.h,v 1.21 2017/01/22 07:16:39 beck Exp $ */ |
| /* |
| * 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 |
| |
| #if defined(_WIN32) |
| #include <winsock2.h> |
| #else |
| #include <sys/time.h> |
| #endif |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include <openssl/opensslconf.h> |
| #include <openssl/buffer.h> |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #define DTLS1_VERSION 0xFEFF |
| |
| /* 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 |
| |
| |
| 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 */ |
| 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; |
| }; |
| |
| struct _pqueue; |
| |
| typedef struct record_pqueue_st { |
| unsigned short epoch; |
| struct _pqueue *q; |
| } record_pqueue; |
| |
| typedef struct hm_fragment_st { |
| struct hm_header_st msg_header; |
| unsigned char *fragment; |
| unsigned char *reassembly; |
| } hm_fragment; |
| |
| struct dtls1_state_internal_st; |
| |
| typedef struct dtls1_state_st { |
| /* Buffered (sent) handshake records */ |
| struct _pqueue *sent_messages; |
| |
| /* Indicates when the last handshake msg or heartbeat sent will timeout */ |
| struct timeval next_timeout; |
| |
| /* Timeout duration */ |
| unsigned short timeout_duration; |
| |
| struct dtls1_state_internal_st *internal; |
| } DTLS1_STATE; |
| |
| typedef struct dtls1_record_data_st { |
| unsigned char *packet; |
| unsigned int packet_length; |
| SSL3_BUFFER rbuf; |
| SSL3_RECORD rrec; |
| } 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 |