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https://gitlab.torproject.org/tpo/core/tor.git
synced 2024-11-27 22:03:31 +01:00
implement first piece of hibernation
still need to track bandwidth, and make decisions based on bandwidth svn:r2630
This commit is contained in:
parent
ae7495dd55
commit
984ffec105
@ -7,7 +7,7 @@ bin_PROGRAMS = tor
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tor_SOURCES = buffers.c circuitbuild.c circuitlist.c \
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circuituse.c command.c config.c \
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connection.c connection_edge.c connection_or.c \
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cpuworker.c directory.c dirserv.c dns.c main.c \
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cpuworker.c directory.c dirserv.c dns.c hibernate.c main.c \
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onion.c relay.c rendcommon.c rendclient.c rendmid.c \
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rendservice.c rephist.c router.c routerlist.c routerparse.c \
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tor_main.c
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@ -17,7 +17,7 @@ tor_LDADD = ../common/libor.a ../common/libor-crypto.a -lz -lssl -lcrypto
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test_SOURCES = buffers.c circuitbuild.c circuitlist.c \
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circuituse.c command.c config.c \
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connection.c connection_edge.c connection_or.c \
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cpuworker.c directory.c dirserv.c dns.c main.c \
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cpuworker.c directory.c dirserv.c dns.c hibernate.c main.c \
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onion.c relay.c rendcommon.c rendclient.c rendmid.c \
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rendservice.c rephist.c router.c routerlist.c routerparse.c \
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test.c
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@ -16,7 +16,6 @@
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#include "or.h"
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extern or_options_t options; /* command-line and config-file options */
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extern int shutting_down; /* whether we should refuse create cells */
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/** Keep statistics about how many of each type of cell we've received. */
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unsigned long stats_n_padding_cells_processed = 0;
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@ -127,7 +126,7 @@ void command_process_cell(cell_t *cell, connection_t *conn) {
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static void command_process_create_cell(cell_t *cell, connection_t *conn) {
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circuit_t *circ;
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if(shutting_down) {
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if(we_are_hibernating()) {
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log_fn(LOG_INFO,"Received create cell but we're shutting down. Sending back destroy.");
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connection_send_destroy(cell->circ_id, conn);
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return;
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@ -13,7 +13,6 @@
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/********* START VARIABLES **********/
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extern or_options_t options; /* command-line and config-file options */
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extern int shutting_down; /* whether we should refuse new connections */
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/** Array of strings to make conn-\>type human-readable. */
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const char *conn_type_to_string[] = {
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@ -401,13 +400,6 @@ static int connection_handle_listener_read(connection_t *conn, int new_type) {
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}
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log(LOG_INFO,"Connection accepted on socket %d (child of fd %d).",news, conn->s);
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if(shutting_down && new_type != CONN_TYPE_DIR) {
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/* allow directory connections even while we're shutting down */
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log(LOG_INFO,"But we're shutting down, so closing (type %d).", new_type);
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tor_close_socket(news);
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return 0;
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}
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set_socket_nonblocking(news);
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/* process entrance policies here, before we even create the connection */
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@ -804,6 +804,11 @@ int connection_exit_begin_conn(cell_t *cell, circuit_t *circ) {
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n_stream->state = EXIT_CONN_STATE_RESOLVEFAILED;
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/* default to failed, change in dns_resolve if it turns out not to fail */
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if(we_are_hibernating()) {
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connection_edge_end(n_stream, END_STREAM_REASON_EXITPOLICY, n_stream->cpath_layer);
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connection_free(n_stream);
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}
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/* send it off to the gethostbyname farm */
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switch(dns_resolve(n_stream)) {
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case 1: /* resolve worked */
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@ -53,13 +53,6 @@ static int please_sigpipe=0; /**< Whether we've caught a sigpipe lately. */
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static int please_shutdown=0; /**< Whether we should shut down Tor. */
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#endif /* signal stuff */
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/** We should exit if shutting_down != 0 and now <= shutting_down.
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* If it's non-zero, don't accept any new circuits or connections.
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* This gets assigned when we receive a sig_int, and if we receive a
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* second one we exit immediately. */
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int shutting_down=0;
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#define SHUTDOWN_WAIT_LENGTH 30 /* seconds */
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/** We set this to 1 when we've fetched a dir, to know whether to complain
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* yet about unrecognized nicknames in entrynodes, exitnodes, etc.
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* Also, we don't try building circuits unless this is 1. */
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@ -373,7 +366,8 @@ void directory_has_arrived(time_t now) {
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if (!time_to_fetch_directory)
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time_to_fetch_directory = now + options.DirFetchPostPeriod;
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if(server_mode()) { /* connect to the appropriate routers */
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if (server_mode() &&
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!we_are_hibernating()) { /* connect to the appropriate routers */
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router_retry_connections();
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}
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}
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@ -400,9 +394,10 @@ static void run_connection_housekeeping(int i, time_t now) {
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now >= conn->timestamp_lastwritten + options.KeepalivePeriod) {
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routerinfo_t *router = router_get_by_digest(conn->identity_digest);
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if((!connection_state_is_open(conn)) ||
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(we_are_hibernating() && !circuit_get_by_conn(conn)) ||
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(!clique_mode() && !circuit_get_by_conn(conn) &&
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(!router || !server_mode() || !router_is_clique_mode(router)))) {
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/* our handshake has expired;
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/* our handshake has expired; we're hibernating;
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* or we have no circuits and we're both either OPs or normal ORs,
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* then kill it. */
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log_fn(LOG_INFO,"Expiring connection to %d (%s:%d).",
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@ -510,13 +505,10 @@ static void run_scheduled_events(time_t now) {
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int i;
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/** 0. See if we've been asked to shut down and our timeout has
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* expired. If so, exit now.
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* expired; or if our bandwidth limits are exhausted and we
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* should hibernate; or if it's time to wake up from hibernation.
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*/
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if(shutting_down && shutting_down <= now) {
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log(LOG_NOTICE,"Clean shutdown finished. Exiting.");
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tor_cleanup();
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exit(0);
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}
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consider_hibernation(now);
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/** 1a. Every MIN_ONION_KEY_LIFETIME seconds, rotate the onion keys,
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* shut down and restart all cpuworkers, and update the directory if
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@ -566,7 +558,7 @@ static void run_scheduled_events(time_t now) {
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/* We're a directory; dump any old descriptors. */
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dirserv_remove_old_servers(ROUTER_MAX_AGE);
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}
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if(server_mode()) {
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if(server_mode() && !we_are_hibernating()) {
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/* dirservers try to reconnect, in case connections have failed;
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* and normal servers try to reconnect to dirservers */
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router_retry_connections();
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@ -574,9 +566,11 @@ static void run_scheduled_events(time_t now) {
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directory_get_from_dirserver(DIR_PURPOSE_FETCH_DIR, NULL, 0);
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/* Force an upload of our rend descriptors every DirFetchPostPeriod seconds. */
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rend_services_upload(1);
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last_uploaded_services = now;
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if(!we_are_hibernating()) {
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/* Force an upload of our rend descriptors every DirFetchPostPeriod seconds. */
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rend_services_upload(1);
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last_uploaded_services = now;
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}
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rend_cache_clean(); /* should this go elsewhere? */
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time_to_fetch_directory = now + options.DirFetchPostPeriod;
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@ -601,8 +595,8 @@ static void run_scheduled_events(time_t now) {
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*/
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connection_expire_held_open();
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/** 3d. And every 60 secionds, we relaunch listeners if any died. */
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if (time_to_check_listeners < now) {
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/** 3d. And every 60 seconds, we relaunch listeners if any died. */
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if (!we_are_hibernating() && time_to_check_listeners < now) {
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retry_all_listeners(0); /* 0 means "only if some died." */
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time_to_check_listeners = now+60;
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}
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@ -612,7 +606,7 @@ static void run_scheduled_events(time_t now) {
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* that became dirty more than NewCircuitPeriod seconds ago,
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* and we make a new circ if there are no clean circuits.
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*/
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if(has_fetched_directory)
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if(has_fetched_directory && !we_are_hibernating())
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circuit_build_needed_circs(now);
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/** 5. We do housekeeping for each connection... */
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@ -842,14 +836,7 @@ static int do_main_loop(void) {
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tor_cleanup();
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exit(0);
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}
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if(shutting_down) { /* we've already been asked. do it now. */
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log(LOG_NOTICE,"Second sigint received; exiting now.");
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tor_cleanup();
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exit(0);
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} else {
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log(LOG_NOTICE,"Interrupt: will shut down in %d seconds. Interrupt again to exit now.", SHUTDOWN_WAIT_LENGTH);
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shutting_down = time(NULL) + SHUTDOWN_WAIT_LENGTH;
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}
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hibernate_begin_shutdown();
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please_shutdown = 0;
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}
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if(please_sigpipe) {
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@ -1236,6 +1236,12 @@ void assert_all_pending_dns_resolves_ok(void);
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void dns_cancel_pending_resolve(char *question);
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int dns_resolve(connection_t *exitconn);
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/********************************* hibernate.c **********************/
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void hibernate_begin_shutdown(void);
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int we_are_hibernating(void);
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void consider_hibernation(time_t now);
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/********************************* main.c ***************************/
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int connection_add(connection_t *conn);
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