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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) 2007-2018, The Tor Project, Inc. */
- /* See LICENSE for licensing information */
- #ifndef ENTRY_CONNECTION_ST_H
- #define ENTRY_CONNECTION_ST_H
- #include "or/edge_connection_st.h"
- /** Subtype of edge_connection_t for an "entry connection" -- that is, a SOCKS
- * connection, a DNS request, a TransPort connection or a NATD connection */
- struct entry_connection_t {
- struct edge_connection_t edge_;
- /** Nickname of planned exit node -- used with .exit support. */
- /* XXX prop220: we need to make chosen_exit_name able to encode Ed IDs too.
- * That's logically part of the UI parts for prop220 though. */
- char *chosen_exit_name;
- socks_request_t *socks_request; /**< SOCKS structure describing request (AP
- * only.) */
- /* === Isolation related, AP only. === */
- entry_port_cfg_t entry_cfg;
- /** AP only: The newnym epoch in which we created this connection. */
- unsigned nym_epoch;
- /** AP only: The original requested address before we rewrote it. */
- char *original_dest_address;
- /* Other fields to isolate on already exist. The ClientAddr is addr. The
- ClientProtocol is a combination of type and socks_request->
- socks_version. SocksAuth is socks_request->username/password.
- DestAddr is in socks_request->address. */
- /** Number of times we've reassigned this application connection to
- * a new circuit. We keep track because the timeout is longer if we've
- * already retried several times. */
- uint8_t num_socks_retries;
- /** For AP connections only: buffer for data that we have sent
- * optimistically, which we might need to re-send if we have to
- * retry this connection. */
- struct buf_t *pending_optimistic_data;
- /* For AP connections only: buffer for data that we previously sent
- * optimistically which we are currently re-sending as we retry this
- * connection. */
- struct buf_t *sending_optimistic_data;
- /** If this is a DNSPort connection, this field holds the pending DNS
- * request that we're going to try to answer. */
- struct evdns_server_request *dns_server_request;
- #define DEBUGGING_17659
- #ifdef DEBUGGING_17659
- uint16_t marked_pending_circ_line;
- const char *marked_pending_circ_file;
- #endif
- #define NUM_CIRCUITS_LAUNCHED_THRESHOLD 10
- /** Number of times we've launched a circuit to handle this stream. If
- * it gets too high, that could indicate an inconsistency between our
- * "launch a circuit to handle this stream" logic and our "attach our
- * stream to one of the available circuits" logic. */
- unsigned int num_circuits_launched:4;
- /** True iff this stream must attach to a one-hop circuit (e.g. for
- * begin_dir). */
- unsigned int want_onehop:1;
- /** True iff this stream should use a BEGIN_DIR relay command to establish
- * itself rather than BEGIN (either via onehop or via a whole circuit). */
- unsigned int use_begindir:1;
- /** For AP connections only. If 1, and we fail to reach the chosen exit,
- * stop requiring it. */
- unsigned int chosen_exit_optional:1;
- /** For AP connections only. If non-zero, this exit node was picked as
- * a result of the TrackHostExit, and the value decrements every time
- * we fail to complete a circuit to our chosen exit -- if it reaches
- * zero, abandon the associated mapaddress. */
- unsigned int chosen_exit_retries:3;
- /** True iff this is an AP connection that came from a transparent or
- * NATd connection */
- unsigned int is_transparent_ap:1;
- /** For AP connections only: Set if this connection's target exit node
- * allows optimistic data (that is, data sent on this stream before
- * the exit has sent a CONNECTED cell) and we have chosen to use it.
- */
- unsigned int may_use_optimistic_data : 1;
- };
- /** Cast a entry_connection_t subtype pointer to a edge_connection_t **/
- #define ENTRY_TO_EDGE_CONN(c) (&(((c))->edge_))
- #endif
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