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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 shutdown.c
* @brief Code to free global resources used by Tor.
*
* In the future, this should all be handled by the subsystem manager. */
#include "core/or/or.h"
#include "app/config/config.h"
#include "app/config/statefile.h"
#include "app/main/main.h"
#include "app/main/shutdown.h"
#include "app/main/subsysmgr.h"
#include "core/mainloop/connection.h"
#include "core/mainloop/mainloop_pubsub.h"
#include "core/or/channeltls.h"
#include "core/or/circuitlist.h"
#include "core/or/circuitmux_ewma.h"
#include "core/or/circuitpadding.h"
#include "core/or/connection_edge.h"
#include "core/or/dos.h"
#include "core/or/scheduler.h"
#include "feature/client/addressmap.h"
#include "feature/client/bridges.h"
#include "feature/client/entrynodes.h"
#include "feature/client/transports.h"
#include "feature/control/control.h"
#include "feature/control/control_auth.h"
#include "feature/dirauth/authmode.h"
#include "feature/dirauth/shared_random.h"
#include "feature/dircache/consdiffmgr.h"
#include "feature/dircache/dirserv.h"
#include "feature/dirparse/routerparse.h"
#include "feature/hibernate/hibernate.h"
#include "feature/hs/hs_common.h"
#include "feature/nodelist/microdesc.h"
#include "feature/nodelist/networkstatus.h"
#include "feature/nodelist/nodelist.h"
#include "feature/nodelist/routerlist.h"
#include "feature/relay/ext_orport.h"
#include "feature/relay/relay_config.h"
#include "feature/rend/rendcache.h"
#include "feature/rend/rendclient.h"
#include "feature/stats/geoip_stats.h"
#include "feature/stats/rephist.h"
#include "lib/evloop/compat_libevent.h"
#include "lib/geoip/geoip.h"
void evdns_shutdown(int);
/** Do whatever cleanup is necessary before shutting Tor down. */
void
tor_cleanup(void)
{
const or_options_t *options = get_options();
if (options->command == CMD_RUN_TOR) {
time_t now = time(NULL);
/* Remove our pid file. We don't care if there was an error when we
* unlink, nothing we could do about it anyways. */
tor_remove_file(options->PidFile);
/* Remove control port file */
tor_remove_file(options->ControlPortWriteToFile);
/* Remove cookie authentication file */
{
char *cookie_fname = get_controller_cookie_file_name();
tor_remove_file(cookie_fname);
tor_free(cookie_fname);
}
/* Remove Extended ORPort cookie authentication file */
{
char *cookie_fname = get_ext_or_auth_cookie_file_name();
if (cookie_fname)
tor_remove_file(cookie_fname);
tor_free(cookie_fname);
}
if (accounting_is_enabled(options))
accounting_record_bandwidth_usage(now, get_or_state());
or_state_mark_dirty(get_or_state(), 0); /* force an immediate save. */
or_state_save(now);
if (authdir_mode(options)) {
sr_save_and_cleanup();
}
if (authdir_mode_tests_reachability(options))
rep_hist_record_mtbf_data(now, 0);
}
timers_shutdown();
tor_free_all(0); /* We could move tor_free_all back into the ifdef below
later, if it makes shutdown unacceptably slow. But for
now, leave it here: it's helped us catch bugs in the
past. */
}
/** Free all memory that we might have allocated somewhere.
* If <b>postfork</b>, we are a worker process and we want to free
* only the parts of memory that we won't touch. If !<b>postfork</b>,
* Tor is shutting down and we should free everything.
*
* Helps us find the real leaks with sanitizers and the like. Also valgrind
* should then report 0 reachable in its leak report (in an ideal world --
* in practice libevent, SSL, libc etc never quite free everything). */
void
tor_free_all(int postfork)
{
if (!postfork) {
evdns_shutdown(1);
}
geoip_free_all();
geoip_stats_free_all();
routerlist_free_all();
networkstatus_free_all();
addressmap_free_all();
dirserv_free_all();
rend_cache_free_all();
rend_service_authorization_free_all();
rep_hist_free_all();
circuit_free_all();
circpad_machines_free();
entry_guards_free_all();
pt_free_all();
channel_tls_free_all();
channel_free_all();
connection_free_all();
connection_edge_free_all();
scheduler_free_all();
nodelist_free_all();
microdesc_free_all();
routerparse_free_all();
control_free_all();
bridges_free_all();
consdiffmgr_free_all();
hs_free_all();
dos_free_all();
circuitmux_ewma_free_all();
accounting_free_all();
circpad_free_all();
if (!postfork) {
config_free_all();
relay_config_free_all();
or_state_free_all();
}
if (!postfork) {
#ifndef _WIN32
tor_getpwnam(NULL);
#endif
}
/* stuff in main.c */
tor_mainloop_disconnect_pubsub();
if (!postfork) {
release_lockfile();
}
subsystems_shutdown();
/* Stuff in util.c and address.c*/
if (!postfork) {
esc_router_info(NULL);
}
}
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