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Diffstat (limited to 'libressl/include/openssl/dtls1.h')
| -rw-r--r-- | libressl/include/openssl/dtls1.h | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/libressl/include/openssl/dtls1.h b/libressl/include/openssl/dtls1.h new file mode 100644 index 00000000..31ba0653 --- /dev/null +++ b/libressl/include/openssl/dtls1.h @@ -0,0 +1,190 @@ +/* $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 |