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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) 2007-2020, 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);
}
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