diff --git a/scripts/maint/practracker/exceptions.txt b/scripts/maint/practracker/exceptions.txt
index a5b3ca7242..7c8a17001e 100644
--- a/scripts/maint/practracker/exceptions.txt
+++ b/scripts/maint/practracker/exceptions.txt
@@ -145,6 +145,7 @@ problem function-size /src/core/or/connection_or.c:connection_or_group_set_badne
 problem function-size /src/core/or/connection_or.c:connection_or_client_learned_peer_id() 142
 problem dependency-violation /src/core/or/connection_or.c 21
 problem dependency-violation /src/core/or/dos.c 6
+problem dependency-violation /src/core/or/extendinfo.c 6
 problem dependency-violation /src/core/or/onion.c 2
 problem file-size /src/core/or/or.h 1150
 problem include-count /src/core/or/or.h 48
diff --git a/src/core/crypto/onion_crypto.c b/src/core/crypto/onion_crypto.c
index 69b4dc40aa..1f34be1cc1 100644
--- a/src/core/crypto/onion_crypto.c
+++ b/src/core/crypto/onion_crypto.c
@@ -31,7 +31,7 @@
  **/
 
 #include "core/or/or.h"
-#include "core/or/circuitbuild.h"
+#include "core/or/extendinfo.h"
 #include "core/crypto/onion_crypto.h"
 #include "core/crypto/onion_fast.h"
 #include "core/crypto/onion_ntor.h"
diff --git a/src/core/or/circuitbuild.c b/src/core/or/circuitbuild.c
index e971fb0865..1f9b5050ef 100644
--- a/src/core/or/circuitbuild.c
+++ b/src/core/or/circuitbuild.c
@@ -45,6 +45,7 @@
 #include "core/or/command.h"
 #include "core/or/connection_edge.h"
 #include "core/or/connection_or.h"
+#include "core/or/extendinfo.h"
 #include "core/or/onion.h"
 #include "core/or/ocirc_event.h"
 #include "core/or/policies.h"
@@ -78,9 +79,6 @@
 #include "feature/nodelist/node_st.h"
 #include "core/or/or_circuit_st.h"
 #include "core/or/origin_circuit_st.h"
-#include "feature/nodelist/microdesc_st.h"
-#include "feature/nodelist/routerinfo_st.h"
-#include "feature/nodelist/routerstatus_st.h"
 
 static int circuit_send_first_onion_skin(origin_circuit_t *circ);
 static int circuit_build_no_more_hops(origin_circuit_t *circ);
@@ -2462,143 +2460,6 @@ onion_extend_cpath(origin_circuit_t *circ)
   return 0;
 }
 
-/** Allocate a new extend_info object based on the various arguments. */
-extend_info_t *
-extend_info_new(const char *nickname,
-                const char *rsa_id_digest,
-                const ed25519_public_key_t *ed_id,
-                crypto_pk_t *onion_key,
-                const curve25519_public_key_t *ntor_key,
-                const tor_addr_t *addr, uint16_t port)
-{
-  extend_info_t *info = tor_malloc_zero(sizeof(extend_info_t));
-  memcpy(info->identity_digest, rsa_id_digest, DIGEST_LEN);
-  if (ed_id && !ed25519_public_key_is_zero(ed_id))
-    memcpy(&info->ed_identity, ed_id, sizeof(ed25519_public_key_t));
-  if (nickname)
-    strlcpy(info->nickname, nickname, sizeof(info->nickname));
-  if (onion_key)
-    info->onion_key = crypto_pk_dup_key(onion_key);
-  if (ntor_key)
-    memcpy(&info->curve25519_onion_key, ntor_key,
-           sizeof(curve25519_public_key_t));
-  tor_addr_copy(&info->addr, addr);
-  info->port = port;
-  return info;
-}
-
-/** Allocate and return a new extend_info that can be used to build a
- * circuit to or through the node <b>node</b>. Use the primary address
- * of the node (i.e. its IPv4 address) unless
- * <b>for_direct_connect</b> is true, in which case the preferred
- * address is used instead. May return NULL if there is not enough
- * info about <b>node</b> to extend to it--for example, if the preferred
- * routerinfo_t or microdesc_t is missing, or if for_direct_connect is
- * true and none of the node's addresses is allowed by tor's firewall
- * and IP version config.
- **/
-extend_info_t *
-extend_info_from_node(const node_t *node, int for_direct_connect)
-{
-  crypto_pk_t *rsa_pubkey = NULL;
-  extend_info_t *info = NULL;
-  tor_addr_port_t ap;
-  int valid_addr = 0;
-
-  if (!node_has_preferred_descriptor(node, for_direct_connect)) {
-    return NULL;
-  }
-
-  /* Choose a preferred address first, but fall back to an allowed address. */
-  if (for_direct_connect)
-    fascist_firewall_choose_address_node(node, FIREWALL_OR_CONNECTION, 0, &ap);
-  else {
-    node_get_prim_orport(node, &ap);
-  }
-  valid_addr = tor_addr_port_is_valid_ap(&ap, 0);
-
-  if (valid_addr)
-    log_debug(LD_CIRC, "using %s for %s",
-              fmt_addrport(&ap.addr, ap.port),
-              node->ri ? node->ri->nickname : node->rs->nickname);
-  else
-    log_warn(LD_CIRC, "Could not choose valid address for %s",
-              node->ri ? node->ri->nickname : node->rs->nickname);
-
-  /* Every node we connect or extend to must support ntor */
-  if (!node_has_curve25519_onion_key(node)) {
-    log_fn(LOG_PROTOCOL_WARN, LD_CIRC,
-           "Attempted to create extend_info for a node that does not support "
-           "ntor: %s", node_describe(node));
-    return NULL;
-  }
-
-  const ed25519_public_key_t *ed_pubkey = NULL;
-
-  /* Don't send the ed25519 pubkey unless the target node actually supports
-   * authenticating with it. */
-  if (node_supports_ed25519_link_authentication(node, 0)) {
-    log_info(LD_CIRC, "Including Ed25519 ID for %s", node_describe(node));
-    ed_pubkey = node_get_ed25519_id(node);
-  } else if (node_get_ed25519_id(node)) {
-    log_info(LD_CIRC, "Not including the ed25519 ID for %s, since it won't "
-             "be able to authenticate it.",
-             node_describe(node));
-  }
-
-  /* Retrieve the curve25519 pubkey. */
-  const curve25519_public_key_t *curve_pubkey =
-    node_get_curve25519_onion_key(node);
-  rsa_pubkey = node_get_rsa_onion_key(node);
-
-  if (valid_addr && node->ri) {
-    info = extend_info_new(node->ri->nickname,
-                           node->identity,
-                           ed_pubkey,
-                           rsa_pubkey,
-                           curve_pubkey,
-                           &ap.addr,
-                           ap.port);
-  } else if (valid_addr && node->rs && node->md) {
-    info = extend_info_new(node->rs->nickname,
-                           node->identity,
-                           ed_pubkey,
-                           rsa_pubkey,
-                           curve_pubkey,
-                           &ap.addr,
-                           ap.port);
-  }
-
-  crypto_pk_free(rsa_pubkey);
-  return info;
-}
-
-/** Release storage held by an extend_info_t struct. */
-void
-extend_info_free_(extend_info_t *info)
-{
-  if (!info)
-    return;
-  crypto_pk_free(info->onion_key);
-  tor_free(info);
-}
-
-/** Allocate and return a new extend_info_t with the same contents as
- * <b>info</b>. */
-extend_info_t *
-extend_info_dup(extend_info_t *info)
-{
-  extend_info_t *newinfo;
-  tor_assert(info);
-  newinfo = tor_malloc(sizeof(extend_info_t));
-  memcpy(newinfo, info, sizeof(extend_info_t));
-  if (info->onion_key)
-    newinfo->onion_key = crypto_pk_dup_key(info->onion_key);
-  else
-    newinfo->onion_key = NULL;
-  return newinfo;
-}
-
 /** Return the node_t for the chosen exit router in <b>state</b>.
  * If there is no chosen exit, or if we don't know the node_t for
  * the chosen exit, return NULL.
@@ -2634,43 +2495,6 @@ build_state_get_exit_nickname(cpath_build_state_t *state)
   return state->chosen_exit->nickname;
 }
 
-/** Return true iff the given address can be used to extend to. */
-int
-extend_info_addr_is_allowed(const tor_addr_t *addr)
-{
-  tor_assert(addr);
-
-  /* Check if we have a private address and if we can extend to it. */
-  if ((tor_addr_is_internal(addr, 0) || tor_addr_is_multicast(addr)) &&
-      !get_options()->ExtendAllowPrivateAddresses) {
-    goto disallow;
-  }
-  /* Allowed! */
-  return 1;
- disallow:
-  return 0;
-}
-
-/* Does ei have a valid TAP key? */
-int
-extend_info_supports_tap(const extend_info_t* ei)
-{
-  tor_assert(ei);
-  /* Valid TAP keys are not NULL */
-  return ei->onion_key != NULL;
-}
-
-/* Does ei have a valid ntor key? */
-int
-extend_info_supports_ntor(const extend_info_t* ei)
-{
-  tor_assert(ei);
-  /* Valid ntor keys have at least one non-zero byte */
-  return !fast_mem_is_zero(
-                          (const char*)ei->curve25519_onion_key.public_key,
-                          CURVE25519_PUBKEY_LEN);
-}
-
 /* Is circuit purpose allowed to use the deprecated TAP encryption protocol?
  * The hidden service protocol still uses TAP for some connections, because
  * ntor onion keys aren't included in HS descriptors or INTRODUCE cells. */
@@ -2705,15 +2529,6 @@ circuit_has_usable_onion_key(const origin_circuit_t *circ)
           circuit_can_use_tap(circ));
 }
 
-/* Does ei have an onion key which it would prefer to use?
- * Currently, we prefer ntor keys*/
-int
-extend_info_has_preferred_onion_key(const extend_info_t* ei)
-{
-  tor_assert(ei);
-  return extend_info_supports_ntor(ei);
-}
-
 /** Find the circuits that are waiting to find out whether their guards are
  * usable, and if any are ready to become usable, mark them open and try
  * attaching streams as appropriate. */
diff --git a/src/core/or/circuitbuild.h b/src/core/or/circuitbuild.h
index 565be09975..bbb78eada7 100644
--- a/src/core/or/circuitbuild.h
+++ b/src/core/or/circuitbuild.h
@@ -42,23 +42,8 @@ MOCK_DECL(int, circuit_all_predicted_ports_handled, (time_t now,
 
 int circuit_append_new_exit(origin_circuit_t *circ, extend_info_t *info);
 int circuit_extend_to_new_exit(origin_circuit_t *circ, extend_info_t *info);
-extend_info_t *extend_info_new(const char *nickname,
-                               const char *rsa_id_digest,
-                               const struct ed25519_public_key_t *ed_id,
-                               crypto_pk_t *onion_key,
-                               const struct curve25519_public_key_t *ntor_key,
-                               const tor_addr_t *addr, uint16_t port);
-extend_info_t *extend_info_from_node(const node_t *r, int for_direct_connect);
-extend_info_t *extend_info_dup(extend_info_t *info);
-void extend_info_free_(extend_info_t *info);
-#define extend_info_free(info) \
-  FREE_AND_NULL(extend_info_t, extend_info_free_, (info))
-int extend_info_addr_is_allowed(const tor_addr_t *addr);
-int extend_info_supports_tap(const extend_info_t* ei);
-int extend_info_supports_ntor(const extend_info_t* ei);
 int circuit_can_use_tap(const origin_circuit_t *circ);
 int circuit_has_usable_onion_key(const origin_circuit_t *circ);
-int extend_info_has_preferred_onion_key(const extend_info_t* ei);
 const uint8_t *build_state_get_exit_rsa_id(cpath_build_state_t *state);
 MOCK_DECL(const node_t *,
           build_state_get_exit_node,(cpath_build_state_t *state));
diff --git a/src/core/or/circuitlist.c b/src/core/or/circuitlist.c
index a69b7cbbe5..f4d6cd3c12 100644
--- a/src/core/or/circuitlist.c
+++ b/src/core/or/circuitlist.c
@@ -64,6 +64,7 @@
 #include "core/or/circuitstats.h"
 #include "core/or/circuitpadding.h"
 #include "core/or/crypt_path.h"
+#include "core/or/extendinfo.h"
 #include "core/mainloop/connection.h"
 #include "app/config/config.h"
 #include "core/or/connection_edge.h"
diff --git a/src/core/or/circuituse.c b/src/core/or/circuituse.c
index f4cd4ced43..0704f8521e 100644
--- a/src/core/or/circuituse.c
+++ b/src/core/or/circuituse.c
@@ -37,6 +37,7 @@
 #include "core/or/circuituse.h"
 #include "core/or/circuitpadding.h"
 #include "core/or/connection_edge.h"
+#include "core/or/extendinfo.h"
 #include "core/or/policies.h"
 #include "feature/client/addressmap.h"
 #include "feature/client/bridges.h"
diff --git a/src/core/or/crypt_path.c b/src/core/or/crypt_path.c
index 8f41540848..e1bbd81251 100644
--- a/src/core/or/crypt_path.c
+++ b/src/core/or/crypt_path.c
@@ -30,6 +30,7 @@
 #include "core/crypto/onion_crypto.h"
 #include "core/or/circuitbuild.h"
 #include "core/or/circuitlist.h"
+#include "core/or/extendinfo.h"
 
 #include "lib/crypt_ops/crypto_dh.h"
 #include "lib/crypt_ops/crypto_util.h"
@@ -259,4 +260,3 @@ cpath_get_n_hops(crypt_path_t **head_ptr)
 }
 
 #endif /* defined(TOR_UNIT_TESTS) */
-
diff --git a/src/core/or/extendinfo.c b/src/core/or/extendinfo.c
new file mode 100644
index 0000000000..74d4a54a33
--- /dev/null
+++ b/src/core/or/extendinfo.c
@@ -0,0 +1,209 @@
+/* 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 extendinfo.c
+ * @brief Functions for creating and using extend_info_t objects.
+ *
+ * An extend_info_t is the information we hold about a relay in order to
+ * extend a circuit to it.
+ **/
+
+#include "core/or/or.h"
+#include "core/or/extendinfo.h"
+
+#include "app/config/config.h"
+#include "core/or/policies.h"
+#include "feature/nodelist/describe.h"
+#include "feature/nodelist/nodelist.h"
+
+#include "core/or/extend_info_st.h"
+#include "feature/nodelist/node_st.h"
+#include "feature/nodelist/routerinfo_st.h"
+#include "feature/nodelist/routerstatus_st.h"
+
+/** Allocate a new extend_info object based on the various arguments. */
+extend_info_t *
+extend_info_new(const char *nickname,
+                const char *rsa_id_digest,
+                const ed25519_public_key_t *ed_id,
+                crypto_pk_t *onion_key,
+                const curve25519_public_key_t *ntor_key,
+                const tor_addr_t *addr, uint16_t port)
+{
+  extend_info_t *info = tor_malloc_zero(sizeof(extend_info_t));
+  memcpy(info->identity_digest, rsa_id_digest, DIGEST_LEN);
+  if (ed_id && !ed25519_public_key_is_zero(ed_id))
+    memcpy(&info->ed_identity, ed_id, sizeof(ed25519_public_key_t));
+  if (nickname)
+    strlcpy(info->nickname, nickname, sizeof(info->nickname));
+  if (onion_key)
+    info->onion_key = crypto_pk_dup_key(onion_key);
+  if (ntor_key)
+    memcpy(&info->curve25519_onion_key, ntor_key,
+           sizeof(curve25519_public_key_t));
+  tor_addr_copy(&info->addr, addr);
+  info->port = port;
+  return info;
+}
+
+/** Allocate and return a new extend_info that can be used to build a
+ * circuit to or through the node <b>node</b>. Use the primary address
+ * of the node (i.e. its IPv4 address) unless
+ * <b>for_direct_connect</b> is true, in which case the preferred
+ * address is used instead. May return NULL if there is not enough
+ * info about <b>node</b> to extend to it--for example, if the preferred
+ * routerinfo_t or microdesc_t is missing, or if for_direct_connect is
+ * true and none of the node's addresses is allowed by tor's firewall
+ * and IP version config.
+ **/
+extend_info_t *
+extend_info_from_node(const node_t *node, int for_direct_connect)
+{
+  crypto_pk_t *rsa_pubkey = NULL;
+  extend_info_t *info = NULL;
+  tor_addr_port_t ap;
+  int valid_addr = 0;
+
+  if (!node_has_preferred_descriptor(node, for_direct_connect)) {
+    return NULL;
+  }
+
+  /* Choose a preferred address first, but fall back to an allowed address. */
+  if (for_direct_connect)
+    fascist_firewall_choose_address_node(node, FIREWALL_OR_CONNECTION, 0, &ap);
+  else {
+    node_get_prim_orport(node, &ap);
+  }
+  valid_addr = tor_addr_port_is_valid_ap(&ap, 0);
+
+  if (valid_addr)
+    log_debug(LD_CIRC, "using %s for %s",
+              fmt_addrport(&ap.addr, ap.port),
+              node->ri ? node->ri->nickname : node->rs->nickname);
+  else
+    log_warn(LD_CIRC, "Could not choose valid address for %s",
+              node->ri ? node->ri->nickname : node->rs->nickname);
+
+  /* Every node we connect or extend to must support ntor */
+  if (!node_has_curve25519_onion_key(node)) {
+    log_fn(LOG_PROTOCOL_WARN, LD_CIRC,
+           "Attempted to create extend_info for a node that does not support "
+           "ntor: %s", node_describe(node));
+    return NULL;
+  }
+
+  const ed25519_public_key_t *ed_pubkey = NULL;
+
+  /* Don't send the ed25519 pubkey unless the target node actually supports
+   * authenticating with it. */
+  if (node_supports_ed25519_link_authentication(node, 0)) {
+    log_info(LD_CIRC, "Including Ed25519 ID for %s", node_describe(node));
+    ed_pubkey = node_get_ed25519_id(node);
+  } else if (node_get_ed25519_id(node)) {
+    log_info(LD_CIRC, "Not including the ed25519 ID for %s, since it won't "
+             "be able to authenticate it.",
+             node_describe(node));
+  }
+
+  /* Retrieve the curve25519 pubkey. */
+  const curve25519_public_key_t *curve_pubkey =
+    node_get_curve25519_onion_key(node);
+  rsa_pubkey = node_get_rsa_onion_key(node);
+
+  if (valid_addr && node->ri) {
+    info = extend_info_new(node->ri->nickname,
+                           node->identity,
+                           ed_pubkey,
+                           rsa_pubkey,
+                           curve_pubkey,
+                           &ap.addr,
+                           ap.port);
+  } else if (valid_addr && node->rs && node->md) {
+    info = extend_info_new(node->rs->nickname,
+                           node->identity,
+                           ed_pubkey,
+                           rsa_pubkey,
+                           curve_pubkey,
+                           &ap.addr,
+                           ap.port);
+  }
+
+  crypto_pk_free(rsa_pubkey);
+  return info;
+}
+
+/** Release storage held by an extend_info_t struct. */
+void
+extend_info_free_(extend_info_t *info)
+{
+  if (!info)
+    return;
+  crypto_pk_free(info->onion_key);
+  tor_free(info);
+}
+
+/** Allocate and return a new extend_info_t with the same contents as
+ * <b>info</b>. */
+extend_info_t *
+extend_info_dup(extend_info_t *info)
+{
+  extend_info_t *newinfo;
+  tor_assert(info);
+  newinfo = tor_malloc(sizeof(extend_info_t));
+  memcpy(newinfo, info, sizeof(extend_info_t));
+  if (info->onion_key)
+    newinfo->onion_key = crypto_pk_dup_key(info->onion_key);
+  else
+    newinfo->onion_key = NULL;
+  return newinfo;
+}
+
+/* Does ei have a valid TAP key? */
+int
+extend_info_supports_tap(const extend_info_t* ei)
+{
+  tor_assert(ei);
+  /* Valid TAP keys are not NULL */
+  return ei->onion_key != NULL;
+}
+
+/* Does ei have a valid ntor key? */
+int
+extend_info_supports_ntor(const extend_info_t* ei)
+{
+  tor_assert(ei);
+  /* Valid ntor keys have at least one non-zero byte */
+  return !fast_mem_is_zero(
+                          (const char*)ei->curve25519_onion_key.public_key,
+                          CURVE25519_PUBKEY_LEN);
+}
+
+/* Does ei have an onion key which it would prefer to use?
+ * Currently, we prefer ntor keys*/
+int
+extend_info_has_preferred_onion_key(const extend_info_t* ei)
+{
+  tor_assert(ei);
+  return extend_info_supports_ntor(ei);
+}
+
+/** Return true iff the given address can be used to extend to. */
+int
+extend_info_addr_is_allowed(const tor_addr_t *addr)
+{
+  tor_assert(addr);
+
+  /* Check if we have a private address and if we can extend to it. */
+  if ((tor_addr_is_internal(addr, 0) || tor_addr_is_multicast(addr)) &&
+      !get_options()->ExtendAllowPrivateAddresses) {
+    goto disallow;
+  }
+  /* Allowed! */
+  return 1;
+ disallow:
+  return 0;
+}
diff --git a/src/core/or/extendinfo.h b/src/core/or/extendinfo.h
new file mode 100644
index 0000000000..1e542efe2a
--- /dev/null
+++ b/src/core/or/extendinfo.h
@@ -0,0 +1,31 @@
+/* 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 extendinfo.h
+ * @brief Header for core/or/extendinfo.c
+ **/
+
+#ifndef TOR_CORE_OR_EXTENDINFO_H
+#define TOR_CORE_OR_EXTENDINFO_H
+
+extend_info_t *extend_info_new(const char *nickname,
+                               const char *rsa_id_digest,
+                               const struct ed25519_public_key_t *ed_id,
+                               crypto_pk_t *onion_key,
+                               const struct curve25519_public_key_t *ntor_key,
+                               const tor_addr_t *addr, uint16_t port);
+extend_info_t *extend_info_from_node(const node_t *r, int for_direct_connect);
+extend_info_t *extend_info_dup(extend_info_t *info);
+void extend_info_free_(extend_info_t *info);
+#define extend_info_free(info) \
+  FREE_AND_NULL(extend_info_t, extend_info_free_, (info))
+int extend_info_addr_is_allowed(const tor_addr_t *addr);
+int extend_info_supports_tap(const extend_info_t* ei);
+int extend_info_supports_ntor(const extend_info_t* ei);
+int extend_info_has_preferred_onion_key(const extend_info_t* ei);
+
+#endif /* !defined(TOR_CORE_OR_EXTENDINFO_H) */
diff --git a/src/core/or/include.am b/src/core/or/include.am
index 3626e76bed..af7c5a6f51 100644
--- a/src/core/or/include.am
+++ b/src/core/or/include.am
@@ -18,6 +18,7 @@ LIBTOR_APP_A_SOURCES += 				\
 	src/core/or/connection_edge.c		\
 	src/core/or/connection_or.c		\
 	src/core/or/dos.c			\
+	src/core/or/extendinfo.c			\
 	src/core/or/onion.c			\
 	src/core/or/ocirc_event.c		\
 	src/core/or/or_periodic.c		\
@@ -64,6 +65,7 @@ noinst_HEADERS +=					\
 	src/core/or/destroy_cell_queue_st.h		\
 	src/core/or/dos.h				\
 	src/core/or/edge_connection_st.h		\
+	src/core/or/extendinfo.h			\
 	src/core/or/half_edge_st.h			\
 	src/core/or/entry_connection_st.h		\
 	src/core/or/entry_port_cfg_st.h			\
diff --git a/src/core/or/relay.c b/src/core/or/relay.c
index 75d2d479e7..6895591064 100644
--- a/src/core/or/relay.c
+++ b/src/core/or/relay.c
@@ -56,6 +56,7 @@
 #include "core/or/circuitlist.h"
 #include "core/or/circuituse.h"
 #include "core/or/circuitpadding.h"
+#include "core/or/extendinfo.h"
 #include "lib/compress/compress.h"
 #include "app/config/config.h"
 #include "core/mainloop/connection.h"
diff --git a/src/feature/control/control_cmd.c b/src/feature/control/control_cmd.c
index a37f285d9e..a8926c0b79 100644
--- a/src/feature/control/control_cmd.c
+++ b/src/feature/control/control_cmd.c
@@ -21,6 +21,7 @@
 #include "core/or/circuituse.h"
 #include "core/or/connection_edge.h"
 #include "core/or/circuitstats.h"
+#include "core/or/extendinfo.h"
 #include "feature/client/addressmap.h"
 #include "feature/client/dnsserv.h"
 #include "feature/client/entrynodes.h"
diff --git a/src/feature/hs/hs_circuit.c b/src/feature/hs/hs_circuit.c
index 447f664f81..5e7a3ac9c8 100644
--- a/src/feature/hs/hs_circuit.c
+++ b/src/feature/hs/hs_circuit.c
@@ -16,6 +16,7 @@
 #include "core/or/policies.h"
 #include "core/or/relay.h"
 #include "core/or/crypt_path.h"
+#include "core/or/extendinfo.h"
 #include "feature/client/circpathbias.h"
 #include "feature/hs/hs_cell.h"
 #include "feature/hs/hs_circuit.h"
diff --git a/src/feature/hs/hs_client.c b/src/feature/hs/hs_client.c
index c3697d0c1d..9670ed44b3 100644
--- a/src/feature/hs/hs_client.c
+++ b/src/feature/hs/hs_client.c
@@ -16,6 +16,7 @@
 #include "core/or/circuitlist.h"
 #include "core/or/circuituse.h"
 #include "core/or/connection_edge.h"
+#include "core/or/extendinfo.h"
 #include "core/or/reasons.h"
 #include "feature/client/circpathbias.h"
 #include "feature/dirclient/dirclient.h"
diff --git a/src/feature/hs/hs_common.c b/src/feature/hs/hs_common.c
index 4639cdb68a..706b42529f 100644
--- a/src/feature/hs/hs_common.c
+++ b/src/feature/hs/hs_common.c
@@ -16,6 +16,7 @@
 #include "app/config/config.h"
 #include "core/or/circuitbuild.h"
 #include "core/or/policies.h"
+#include "core/or/extendinfo.h"
 #include "feature/dirauth/shared_random_state.h"
 #include "feature/hs/hs_cache.h"
 #include "feature/hs/hs_circuitmap.h"
diff --git a/src/feature/hs/hs_service.c b/src/feature/hs/hs_service.c
index a42879a48f..249eb47b5d 100644
--- a/src/feature/hs/hs_service.c
+++ b/src/feature/hs/hs_service.c
@@ -16,6 +16,7 @@
 #include "core/or/circuitbuild.h"
 #include "core/or/circuitlist.h"
 #include "core/or/circuituse.h"
+#include "core/or/extendinfo.h"
 #include "core/or/relay.h"
 #include "feature/client/circpathbias.h"
 #include "feature/dirclient/dirclient.h"
diff --git a/src/feature/relay/circuitbuild_relay.c b/src/feature/relay/circuitbuild_relay.c
index 470e639aa7..36e64d9b33 100644
--- a/src/feature/relay/circuitbuild_relay.c
+++ b/src/feature/relay/circuitbuild_relay.c
@@ -33,6 +33,7 @@
 #include "core/or/channel.h"
 #include "core/or/circuitbuild.h"
 #include "core/or/circuitlist.h"
+#include "core/or/extendinfo.h"
 #include "core/or/onion.h"
 #include "core/or/relay.h"
 
diff --git a/src/feature/relay/selftest.c b/src/feature/relay/selftest.c
index 101704e1c9..c663eb26b2 100644
--- a/src/feature/relay/selftest.c
+++ b/src/feature/relay/selftest.c
@@ -24,6 +24,7 @@
 #include "core/or/circuitlist.h"
 #include "core/or/circuituse.h"
 #include "core/or/crypt_path_st.h"
+#include "core/or/extendinfo.h"
 #include "core/or/extend_info_st.h"
 #include "core/or/origin_circuit_st.h"
 #include "core/or/relay.h"
diff --git a/src/feature/rend/rendclient.c b/src/feature/rend/rendclient.c
index 09db7045fa..9c2286bbcf 100644
--- a/src/feature/rend/rendclient.c
+++ b/src/feature/rend/rendclient.c
@@ -15,6 +15,7 @@
 #include "core/or/circuitlist.h"
 #include "core/or/circuituse.h"
 #include "core/or/connection_edge.h"
+#include "core/or/extendinfo.h"
 #include "core/or/relay.h"
 #include "feature/client/circpathbias.h"
 #include "feature/control/control_events.h"
diff --git a/src/feature/rend/rendcommon.c b/src/feature/rend/rendcommon.c
index 5d04755819..07cbeaa2f7 100644
--- a/src/feature/rend/rendcommon.c
+++ b/src/feature/rend/rendcommon.c
@@ -14,6 +14,7 @@
 #include "core/or/circuitbuild.h"
 #include "core/or/circuitlist.h"
 #include "core/or/circuituse.h"
+#include "core/or/extendinfo.h"
 #include "app/config/config.h"
 #include "feature/control/control_events.h"
 #include "lib/crypt_ops/crypto_rand.h"
diff --git a/src/feature/rend/rendservice.c b/src/feature/rend/rendservice.c
index a88c2080fd..8154840f12 100644
--- a/src/feature/rend/rendservice.c
+++ b/src/feature/rend/rendservice.c
@@ -16,6 +16,7 @@
 #include "core/or/circuitbuild.h"
 #include "core/or/circuitlist.h"
 #include "core/or/circuituse.h"
+#include "core/or/extendinfo.h"
 #include "core/or/policies.h"
 #include "core/or/relay.h"
 #include "core/or/crypt_path.h"
diff --git a/src/test/test_circuitpadding.c b/src/test/test_circuitpadding.c
index 3e3a59dc96..cc8c63d608 100644
--- a/src/test/test_circuitpadding.c
+++ b/src/test/test_circuitpadding.c
@@ -23,6 +23,7 @@
 #include "core/or/circuitbuild.h"
 #include "core/or/circuitpadding.h"
 #include "core/or/circuitpadding_machines.h"
+#include "core/or/extendinfo.h"
 #include "core/mainloop/netstatus.h"
 #include "core/crypto/relay_crypto.h"
 #include "core/or/protover.h"
diff --git a/src/test/test_hs_client.c b/src/test/test_hs_client.c
index ae5cc5ed84..3fef1b41c6 100644
--- a/src/test/test_hs_client.c
+++ b/src/test/test_hs_client.c
@@ -41,6 +41,7 @@
 #include "feature/rend/rendcache.h"
 #include "core/or/circuitlist.h"
 #include "core/or/circuitbuild.h"
+#include "core/or/extendinfo.h"
 #include "core/mainloop/connection.h"
 #include "core/or/connection_edge.h"
 #include "feature/nodelist/networkstatus.h"
diff --git a/src/test/test_policy.c b/src/test/test_policy.c
index 7949e90e9e..6cb588a0eb 100644
--- a/src/test/test_policy.c
+++ b/src/test/test_policy.c
@@ -8,6 +8,7 @@
 #include "app/config/config.h"
 #include "core/or/circuitbuild.h"
 #include "core/or/policies.h"
+#include "core/or/extendinfo.h"
 #include "feature/dirparse/policy_parse.h"
 #include "feature/hs/hs_common.h"
 #include "feature/hs/hs_descriptor.h"