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diff --git a/src/or/rend_intro_point_st.h b/src/or/rend_intro_point_st.h
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+++ b/src/or/rend_intro_point_st.h
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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 REND_INTRO_POINT_ST_H
+#define REND_INTRO_POINT_ST_H
+
+/** Introduction point information.  Used both in rend_service_t (on
+ * the service side) and in rend_service_descriptor_t (on both the
+ * client and service side). */
+struct rend_intro_point_t {
+  extend_info_t *extend_info; /**< Extend info for connecting to this
+                               * introduction point via a multi-hop path. */
+  crypto_pk_t *intro_key; /**< Introduction key that replaces the service
+                               * key, if this descriptor is V2. */
+
+  /** (Client side only) Flag indicating that a timeout has occurred
+   * after sending an INTRODUCE cell to this intro point.  After a
+   * timeout, an intro point should not be tried again during the same
+   * hidden service connection attempt, but it may be tried again
+   * during a future connection attempt. */
+  unsigned int timed_out : 1;
+
+  /** (Client side only) The number of times we have failed to build a
+   * circuit to this intro point for some reason other than our
+   * circuit-build timeout.  See also MAX_INTRO_POINT_REACHABILITY_FAILURES. */
+  unsigned int unreachable_count : 3;
+
+  /** (Service side only) Flag indicating that this intro point was
+   * included in the last HS descriptor we generated. */
+  unsigned int listed_in_last_desc : 1;
+
+  /** (Service side only) A replay cache recording the RSA-encrypted parts
+   * of INTRODUCE2 cells this intro point's circuit has received.  This is
+   * used to prevent replay attacks. */
+  replaycache_t *accepted_intro_rsa_parts;
+
+  /** (Service side only) Count of INTRODUCE2 cells accepted from this
+   * intro point.
+   */
+  int accepted_introduce2_count;
+
+  /** (Service side only) Maximum number of INTRODUCE2 cells that this IP
+   * will accept. This is a random value between
+   * INTRO_POINT_MIN_LIFETIME_INTRODUCTIONS and
+   * INTRO_POINT_MAX_LIFETIME_INTRODUCTIONS. */
+  int max_introductions;
+
+  /** (Service side only) The time at which this intro point was first
+   * published, or -1 if this intro point has not yet been
+   * published. */
+  time_t time_published;
+
+  /** (Service side only) The time at which this intro point should
+   * (start to) expire, or -1 if we haven't decided when this intro
+   * point should expire. */
+  time_t time_to_expire;
+
+  /** (Service side only) The amount of circuit creation we've made to this
+   * intro point. This is incremented every time we do a circuit relaunch on
+   * this object which is triggered when the circuit dies but the node is
+   * still in the consensus. After MAX_INTRO_POINT_CIRCUIT_RETRIES, we give
+   * up on it. */
+  unsigned int circuit_retries;
+
+  /** (Service side only) Set if this intro point has an established circuit
+   * and unset if it doesn't. */
+  unsigned int circuit_established:1;
+};
+
+#endif
+