2a8db71713
We'd like the first bit of early_data and the ClientHello to go in the same TCP packet if at all possible to enable things like TCP Fast Open. Also, if you're only going to send one block of early data then you also don't need to worry about TCP_NODELAY. Fixes #4783 Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/4802)
137 lines
4.9 KiB
C
137 lines
4.9 KiB
C
/*
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* Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/*****************************************************************************
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* *
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* These enums should be considered PRIVATE to the state machine. No *
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* non-state machine code should need to use these *
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* *
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*****************************************************************************/
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/*
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* Valid return codes used for functions performing work prior to or after
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* sending or receiving a message
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*/
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typedef enum {
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/* Something went wrong */
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WORK_ERROR,
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/* We're done working and there shouldn't be anything else to do after */
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WORK_FINISHED_STOP,
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/* We're done working move onto the next thing */
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WORK_FINISHED_CONTINUE,
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/* We're working on phase A */
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WORK_MORE_A,
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/* We're working on phase B */
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WORK_MORE_B,
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/* We're working on phase C */
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WORK_MORE_C
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} WORK_STATE;
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/* Write transition return codes */
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typedef enum {
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/* Something went wrong */
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WRITE_TRAN_ERROR,
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/* A transition was successfully completed and we should continue */
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WRITE_TRAN_CONTINUE,
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/* There is no more write work to be done */
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WRITE_TRAN_FINISHED
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} WRITE_TRAN;
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/* Message flow states */
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typedef enum {
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/* No handshake in progress */
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MSG_FLOW_UNINITED,
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/* A permanent error with this connection */
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MSG_FLOW_ERROR,
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/* We are reading messages */
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MSG_FLOW_READING,
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/* We are writing messages */
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MSG_FLOW_WRITING,
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/* Handshake has finished */
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MSG_FLOW_FINISHED
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} MSG_FLOW_STATE;
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/* Read states */
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typedef enum {
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READ_STATE_HEADER,
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READ_STATE_BODY,
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READ_STATE_POST_PROCESS
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} READ_STATE;
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/* Write states */
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typedef enum {
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WRITE_STATE_TRANSITION,
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WRITE_STATE_PRE_WORK,
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WRITE_STATE_SEND,
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WRITE_STATE_POST_WORK
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} WRITE_STATE;
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/*****************************************************************************
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* *
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* This structure should be considered "opaque" to anything outside of the *
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* state machine. No non-state machine code should be accessing the members *
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* of this structure. *
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* *
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*****************************************************************************/
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struct ossl_statem_st {
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MSG_FLOW_STATE state;
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WRITE_STATE write_state;
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WORK_STATE write_state_work;
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READ_STATE read_state;
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WORK_STATE read_state_work;
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OSSL_HANDSHAKE_STATE hand_state;
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/* The handshake state requested by an API call (e.g. HelloRequest) */
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OSSL_HANDSHAKE_STATE request_state;
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int in_init;
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int read_state_first_init;
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/* true when we are actually in SSL_accept() or SSL_connect() */
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int in_handshake;
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/*
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* True when are processing a "real" handshake that needs cleaning up (not
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* just a HelloRequest or similar).
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*/
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int cleanuphand;
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/* Should we skip the CertificateVerify message? */
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unsigned int no_cert_verify;
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int use_timer;
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};
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typedef struct ossl_statem_st OSSL_STATEM;
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/*****************************************************************************
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* *
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* The following macros/functions represent the libssl internal API to the *
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* state machine. Any libssl code may call these functions/macros *
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* *
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*****************************************************************************/
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__owur int ossl_statem_accept(SSL *s);
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__owur int ossl_statem_connect(SSL *s);
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void ossl_statem_clear(SSL *s);
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void ossl_statem_set_renegotiate(SSL *s);
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void ossl_statem_fatal(SSL *s, int al, int func, int reason, const char *file,
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int line);
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# define SSL_AD_NO_ALERT -1
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# ifndef OPENSSL_NO_ERR
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# define SSLfatal(s, al, f, r) ossl_statem_fatal((s), (al), (f), (r), \
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OPENSSL_FILE, OPENSSL_LINE)
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# else
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# define SSLfatal(s, al, f, r) ossl_statem_fatal((s), (al), (f), (r), NULL, 0)
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# endif
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int ossl_statem_in_error(const SSL *s);
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void ossl_statem_set_in_init(SSL *s, int init);
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int ossl_statem_get_in_handshake(SSL *s);
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void ossl_statem_set_in_handshake(SSL *s, int inhand);
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__owur int ossl_statem_skip_early_data(SSL *s);
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void ossl_statem_check_finish_init(SSL *s, int send);
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void ossl_statem_set_hello_verify_done(SSL *s);
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__owur int ossl_statem_app_data_allowed(SSL *s);
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/* Flush the write BIO */
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int statem_flush(SSL *s);
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