Move literally everything out of src/or

This commit won't build yet -- it just puts everything in a slightly
more logical place.

The reasoning here is that "src/core" will hold the stuff that every (or
nearly every) tor instance will need in order to do onion routing.
Other features (including some necessary ones) will live in
"src/feature".  The "src/app" directory will hold the stuff needed
to have Tor be an application you can actually run.

This commit DOES NOT refactor the former contents of src/or into a
logical set of acyclic libraries, or change any code at all.  That
will have to come in the future.

We will continue to move things around and split them in the future,
but I hope this lays a reasonable groundwork for doing so.

1 files changed, 77 insertions, 0 deletions

diff --git a/src/core/or/edge_connection_st.h b/src/core/or/edge_connection_st.h
new file mode 100644
index 0000000000..d58e1c2b8c
--- /dev/null
+++ b/src/core/or/edge_connection_st.h
@@ -0,0 +1,77 @@
+/* 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 EDGE_CONNECTION_ST_H
+#define EDGE_CONNECTION_ST_H
+
+#include "or/or.h"
+
+#include "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
+