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/* Copyright (c) 2001 Matej Pfajfar.
* Copyright (c) 2001-2004, Roger Dingledine.
* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
* Copyright (c) 2007-2020, The Tor Project, Inc. */
/* See LICENSE for licensing information */
/**
* \file orconn_event.h
* \brief Header file for orconn_event.c
*
* The OR_CONN_STATE_* symbols are here to make it easier for
* subscribers to make decisions based on the messages that they
* receive.
**/
#ifndef TOR_ORCONN_EVENT_H
#define TOR_ORCONN_EVENT_H
#include "lib/pubsub/pubsub.h"
/**
* @name States of OR connections
*
* These must be in a partial ordering such that usually no OR
* connection will transition from a higher-numbered state to a
* lower-numbered one. Code such as bto_update_best() depends on this
* ordering to determine the best state it's seen so far.
* @{ */
#define OR_CONN_STATE_MIN_ 1
/** State for a connection to an OR: waiting for connect() to finish. */
#define OR_CONN_STATE_CONNECTING 1
/** State for a connection to an OR: waiting for proxy handshake to complete */
#define OR_CONN_STATE_PROXY_HANDSHAKING 2
/** State for an OR connection client: SSL is handshaking, not done
* yet. */
#define OR_CONN_STATE_TLS_HANDSHAKING 3
/** State for a connection to an OR: We're doing a second SSL handshake for
* renegotiation purposes. (V2 handshake only.) */
#define OR_CONN_STATE_TLS_CLIENT_RENEGOTIATING 4
/** State for a connection at an OR: We're waiting for the client to
* renegotiate (to indicate a v2 handshake) or send a versions cell (to
* indicate a v3 handshake) */
#define OR_CONN_STATE_TLS_SERVER_RENEGOTIATING 5
/** State for an OR connection: We're done with our SSL handshake, we've done
* renegotiation, but we haven't yet negotiated link protocol versions and
* sent a netinfo cell. */
#define OR_CONN_STATE_OR_HANDSHAKING_V2 6
/** State for an OR connection: We're done with our SSL handshake, but we
* haven't yet negotiated link protocol versions, done a V3 handshake, and
* sent a netinfo cell. */
#define OR_CONN_STATE_OR_HANDSHAKING_V3 7
/** State for an OR connection: Ready to send/receive cells. */
#define OR_CONN_STATE_OPEN 8
#define OR_CONN_STATE_MAX_ 8
/** @} */
/** Used to indicate the type of an OR connection event passed to the
* controller. The various types are defined in control-spec.txt */
typedef enum or_conn_status_event_t {
OR_CONN_EVENT_LAUNCHED = 0,
OR_CONN_EVENT_CONNECTED = 1,
OR_CONN_EVENT_FAILED = 2,
OR_CONN_EVENT_CLOSED = 3,
OR_CONN_EVENT_NEW = 4,
} or_conn_status_event_t;
/**
* Message for orconn state update
*
* This contains information about internal state changes of
* or_connection_t objects. The chan and proxy_type fields are
* additional information that a subscriber may need to make
* decisions.
**/
typedef struct orconn_state_msg_t {
uint64_t gid; /**< connection's global ID */
uint64_t chan; /**< associated channel ID */
int proxy_type; /**< connection's proxy type */
uint8_t state; /**< new connection state */
} orconn_state_msg_t;
DECLARE_MESSAGE(orconn_state, orconn_state, orconn_state_msg_t *);
/**
* Message for orconn status event
*
* This contains information that ends up in ORCONN control protocol
* events.
**/
typedef struct orconn_status_msg_t {
uint64_t gid; /**< connection's global ID */
int status; /**< or_conn_status_event_t */
int reason; /**< reason */
} orconn_status_msg_t;
DECLARE_MESSAGE(orconn_status, orconn_status, orconn_status_msg_t *);
#ifdef ORCONN_EVENT_PRIVATE
void orconn_state_publish(orconn_state_msg_t *);
void orconn_status_publish(orconn_status_msg_t *);
#endif
#endif /* !defined(TOR_ORCONN_EVENT_H) */
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