1 files changed, 67 insertions, 0 deletions
diff --git a/src/core/or/or_periodic.c b/src/core/or/or_periodic.c
new file mode 100644
index 0000000000..4dfdce14ca
--- /dev/null
+++ b/src/core/or/or_periodic.c
@@ -0,0 +1,67 @@
+/* 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 or_periodic.c
+ * @brief Periodic callbacks for the onion routing subsystem
+ **/
+
+#include "orconfig.h"
+#include "core/or/or.h"
+
+#include "core/mainloop/periodic.h"
+
+#include "core/or/channel.h"
+#include "core/or/circuituse.h"
+#include "core/or/or_periodic.h"
+
+#include "feature/relay/routermode.h"
+
+#ifndef COCCI
+#define DECLARE_EVENT(name, roles, flags)         \
+  static periodic_event_item_t name ## _event =   \
+    PERIODIC_EVENT(name,                          \
+                   PERIODIC_EVENT_ROLE_##roles,   \
+                   flags)
+#endif /* !defined(COCCI) */
+
+#define FL(name) (PERIODIC_EVENT_FLAG_ ## name)
+
+#define CHANNEL_CHECK_INTERVAL (60*60)
+static int
+check_canonical_channels_callback(time_t now, const or_options_t *options)
+{
+  (void)now;
+  if (public_server_mode(options))
+    channel_check_for_duplicates();
+
+  return CHANNEL_CHECK_INTERVAL;
+}
+
+DECLARE_EVENT(check_canonical_channels, RELAY, FL(NEED_NET));
+
+/**
+ * Periodic callback: as a server, see if we have any old unused circuits
+ * that should be expired */
+static int
+expire_old_circuits_serverside_callback(time_t now,
+                                        const or_options_t *options)
+{
+  (void)options;
+  /* every 11 seconds, so not usually the same second as other such events */
+  circuit_expire_old_circuits_serverside(now);
+  return 11;
+}
+
+DECLARE_EVENT(expire_old_circuits_serverside, ROUTER, FL(NEED_NET));
+
+void
+or_register_periodic_events(void)
+{
+  // These are router-only events, but they're owned by the OR subsystem. */
+  periodic_events_register(&check_canonical_channels_event);
+  periodic_events_register(&expire_old_circuits_serverside_event);
+}