diff options
Diffstat (limited to 'openssl/ssl/dtls1.h')
| -rw-r--r-- | openssl/ssl/dtls1.h | 394 |
1 files changed, 183 insertions, 211 deletions
diff --git a/openssl/ssl/dtls1.h b/openssl/ssl/dtls1.h index 338575268..8deb299a7 100644 --- a/openssl/ssl/dtls1.h +++ b/openssl/ssl/dtls1.h @@ -1,7 +1,7 @@ /* ssl/dtls1.h */ -/* +/* * DTLS implementation written by Nagendra Modadugu - * (nagendra@cs.stanford.edu) for the OpenSSL project 2005. + * (nagendra@cs.stanford.edu) for the OpenSSL project 2005. */ /* ==================================================================== * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved. @@ -11,7 +11,7 @@ * are met: * * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. + * 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 @@ -58,237 +58,209 @@ */ #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 +# 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 +# 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_VERSION 0xFEFF +# define DTLS_MAX_VERSION DTLS1_VERSION +# define DTLS1_VERSION_MAJOR 0xFE -#define DTLS1_BAD_VER 0x0100 +# define DTLS1_BAD_VER 0x0100 -#if 0 +# if 0 /* this alert description is not specified anywhere... */ -#define DTLS1_AD_MISSING_HANDSHAKE_MESSAGE 110 -#endif +# define DTLS1_AD_MISSING_HANDSHAKE_MESSAGE 110 +# endif /* lengths of messages */ -#define DTLS1_COOKIE_LENGTH 256 +# define DTLS1_COOKIE_LENGTH 256 -#define DTLS1_RT_HEADER_LENGTH 13 +# define DTLS1_RT_HEADER_LENGTH 13 -#define DTLS1_HM_HEADER_LENGTH 12 +# define DTLS1_HM_HEADER_LENGTH 12 -#define DTLS1_HM_BAD_FRAGMENT -2 -#define DTLS1_HM_FRAGMENT_RETRY -3 +# define DTLS1_HM_BAD_FRAGMENT -2 +# define DTLS1_HM_FRAGMENT_RETRY -3 -#define DTLS1_CCS_HEADER_LENGTH 1 +# 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 +# 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_SSL_INTERN -#ifndef OPENSSL_NO_SCTP -#define DTLS1_SCTP_AUTH_LABEL "EXPORTER_DTLS_OVER_SCTP" -#endif +# ifndef OPENSSL_NO_SCTP +# define DTLS1_SCTP_AUTH_LABEL "EXPORTER_DTLS_OVER_SCTP" +# endif /* Max MTU overhead we know about so far is 40 for IPv6 + 8 for UDP */ -#define DTLS1_MAX_MTU_OVERHEAD 48 - -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 link_mtu; /* max on-the-wire DTLS packet size */ - 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; - /* - * Set when the handshake is ready to process peer's ChangeCipherSpec message. - * Cleared after the message has been processed. - */ - 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 +# define DTLS1_MAX_MTU_OVERHEAD 48 + +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 link_mtu; /* max on-the-wire DTLS packet size */ + 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; + /* + * Set when the handshake is ready to process peer's ChangeCipherSpec message. + * Cleared after the message has been processed. + */ + 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_READ_COUNT 2 +# define DTLS1_TMO_WRITE_COUNT 2 -#define DTLS1_TMO_ALERT_COUNT 12 +# define DTLS1_TMO_ALERT_COUNT 12 #ifdef __cplusplus } |