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Diffstat (limited to 'main/openssl/ssl/dtls1.h')
| -rw-r--r-- | main/openssl/ssl/dtls1.h | 267 |
1 files changed, 267 insertions, 0 deletions
diff --git a/main/openssl/ssl/dtls1.h b/main/openssl/ssl/dtls1.h new file mode 100644 index 00000000..2900d1d8 --- /dev/null +++ b/main/openssl/ssl/dtls1.h @@ -0,0 +1,267 @@ +/* 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 +#include <sys/time.h> +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +#define DTLS1_VERSION 0xFEFF +#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 + + +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 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; + + } DTLS1_STATE; + +typedef struct dtls1_record_data_st + { + unsigned char *packet; + unsigned int packet_length; + SSL3_BUFFER rbuf; + SSL3_RECORD rrec; + } DTLS1_RECORD_DATA; + + +/* 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 + |