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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) 2007-2019, The Tor Project, Inc. */
/* See LICENSE for licensing information */
#ifndef EDGE_CONNECTION_ST_H
#define EDGE_CONNECTION_ST_H
#include "core/or/or.h"
#include "core/or/connection_st.h"
/** Subtype of connection_t for an "edge connection" -- that is, an entry (ap)
* connection, or an exit. */
struct edge_connection_t {
connection_t base_;
struct edge_connection_t *next_stream; /**< Points to the next stream at this
* edge, if any */
int package_window; /**< How many more relay cells can I send into the
* circuit? */
int deliver_window; /**< How many more relay cells can end at me? */
struct circuit_t *on_circuit; /**< The circuit (if any) that this edge
* connection is using. */
/** A pointer to which node in the circ this conn exits at. Set for AP
* connections and for hidden service exit connections. */
struct crypt_path_t *cpath_layer;
/** What rendezvous service are we querying for (if an AP) or providing (if
* an exit)? */
rend_data_t *rend_data;
/* Hidden service connection identifier for edge connections. Used by the HS
* client-side code to identify client SOCKS connections and by the
* service-side code to match HS circuits with their streams. */
struct hs_ident_edge_conn_t *hs_ident;
uint32_t address_ttl; /**< TTL for address-to-addr mapping on exit
* connection. Exit connections only. */
uint32_t begincell_flags; /** Flags sent or received in the BEGIN cell
* for this connection */
streamid_t stream_id; /**< The stream ID used for this edge connection on its
* circuit */
/** The reason why this connection is closing; passed to the controller. */
uint16_t end_reason;
/** Bytes read since last call to control_event_stream_bandwidth_used() */
uint32_t n_read;
/** Bytes written since last call to control_event_stream_bandwidth_used() */
uint32_t n_written;
/** True iff this connection is for a DNS request only. */
unsigned int is_dns_request:1;
/** True iff this connection is for a PTR DNS request. (exit only) */
unsigned int is_reverse_dns_lookup:1;
unsigned int edge_has_sent_end:1; /**< For debugging; only used on edge
* connections. Set once we've set the stream end,
* and check in connection_about_to_close_connection().
*/
/** True iff we've blocked reading until the circuit has fewer queued
* cells. */
unsigned int edge_blocked_on_circ:1;
/** Unique ID for directory requests; this used to be in connection_t, but
* that's going away and being used on channels instead. We still tag
* edge connections with dirreq_id from circuits, so it's copied here. */
uint64_t dirreq_id;
};
#endif
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