123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973974975976977978979980981982983984985986987988989990991992993994995996997998999100010011002100310041005100610071008100910101011101210131014101510161017101810191020102110221023102410251026102710281029103010311032103310341035103610371038103910401041104210431044104510461047104810491050105110521053105410551056105710581059106010611062106310641065106610671068106910701071107210731074107510761077107810791080108110821083108410851086108710881089109010911092109310941095109610971098109911001101110211031104110511061107110811091110111111121113111411151116111711181119112011211122112311241125112611271128112911301131113211331134113511361137113811391140114111421143114411451146114711481149115011511152115311541155115611571158115911601161116211631164116511661167116811691170117111721173117411751176117711781179118011811182118311841185118611871188118911901191119211931194119511961197119811991200120112021203120412051206120712081209121012111212121312141215121612171218121912201221122212231224122512261227122812291230123112321233123412351236123712381239124012411242124312441245124612471248124912501251125212531254125512561257125812591260126112621263126412651266126712681269127012711272127312741275127612771278127912801281128212831284128512861287128812891290129112921293129412951296129712981299130013011302130313041305130613071308130913101311131213131314131513161317131813191320132113221323132413251326132713281329133013311332133313341335133613371338133913401341134213431344134513461347134813491350135113521353135413551356135713581359136013611362136313641365136613671368136913701371137213731374137513761377 |
- /* Copyright 2001 Matej Pfajfar.
- * Copyright 2001-2004 Roger Dingledine.
- * Copyright 2004 Roger Dingledine, Nick Mathewson. */
- /* See LICENSE for licensing information */
- /* $Id$ */
- const char main_c_id[] = "$Id$";
- /**
- * \file main.c
- * \brief Tor main loop and startup functions.
- **/
- #include "or.h"
- /********* PROTOTYPES **********/
- static void dumpstats(int severity); /* log stats */
- /********* START VARIABLES **********/
- int global_read_bucket; /**< Max number of bytes I can read this second. */
- int global_write_bucket; /**< Max number of bytes I can write this second. */
- /** What was the read bucket before the last call to prepare_for_pool?
- * (used to determine how many bytes we've read). */
- static int stats_prev_global_read_bucket;
- /** What was the write bucket before the last call to prepare_for_pool?
- * (used to determine how many bytes we've written). */
- static int stats_prev_global_write_bucket;
- /** How many bytes have we read/written since we started the process? */
- static uint64_t stats_n_bytes_read = 0;
- static uint64_t stats_n_bytes_written = 0;
- /** How many seconds have we been running? */
- long stats_n_seconds_uptime = 0;
- /** When do we next download a directory? */
- static time_t time_to_fetch_directory = 0;
- /** When do we next upload our descriptor? */
- static time_t time_to_force_upload_descriptor = 0;
- /** When do we next download a running-routers summary? */
- static time_t time_to_fetch_running_routers = 0;
- /** Array of all open connections; each element corresponds to the element of
- * poll_array in the same position. The first nfds elements are valid. */
- static connection_t *connection_array[MAXCONNECTIONS] =
- { NULL };
- /** Array of pollfd objects for calls to poll(). */
- static struct pollfd poll_array[MAXCONNECTIONS];
- static int nfds=0; /**< Number of connections currently active. */
- #ifndef MS_WINDOWS /* do signal stuff only on unix */
- static int please_dumpstats=0; /**< Whether we should dump stats during the loop. */
- static int please_debug=0; /**< Whether we should switch all logs to -l debug. */
- static int please_reset=0; /**< Whether we just got a sighup. */
- static int please_reap_children=0; /**< Whether we should waitpid for exited children. */
- static int please_sigpipe=0; /**< Whether we've caught a sigpipe lately. */
- static int please_shutdown=0; /**< Whether we should shut down Tor. */
- #endif /* signal stuff */
- /** We set this to 1 when we've fetched a dir, to know whether to complain
- * yet about unrecognized nicknames in entrynodes, exitnodes, etc.
- * Also, we don't try building circuits unless this is 1. */
- int has_fetched_directory=0;
- /** We set this to 1 when we've opened a circuit, so we can print a log
- * entry to inform the user that Tor is working. */
- int has_completed_circuit=0;
- /* #define MS_WINDOWS_SERVICE */
- #ifdef MS_WINDOWS_SERVICE
- #include <tchar.h>
- #define GENSRV_SERVICENAME TEXT("tor-"VERSION)
- #define GENSRV_DISPLAYNAME TEXT("Tor "VERSION" Win32 Service")
- SERVICE_STATUS service_status;
- SERVICE_STATUS_HANDLE hStatus;
- static char **backup_argv;
- static int backup_argc;
- #endif
- #define CHECK_DESCRIPTOR_INTERVAL 60
- /********* END VARIABLES ************/
- /****************************************************************************
- *
- * This section contains accessors and other methods on the connection_array
- * and poll_array variables (which are global within this file and unavailable
- * outside it).
- *
- ****************************************************************************/
- /** Add <b>conn</b> to the array of connections that we can poll on. The
- * connection's socket must be set; the connection starts out
- * non-reading and non-writing.
- */
- int connection_add(connection_t *conn) {
- tor_assert(conn);
- tor_assert(conn->s >= 0);
- if (nfds >= get_options()->MaxConn-1) {
- log_fn(LOG_WARN,"failing because nfds is too high.");
- return -1;
- }
- tor_assert(conn->poll_index == -1); /* can only connection_add once */
- conn->poll_index = nfds;
- connection_array[nfds] = conn;
- poll_array[nfds].fd = conn->s;
- /* zero these out here, because otherwise we'll inherit values from the previously freed one */
- poll_array[nfds].events = 0;
- poll_array[nfds].revents = 0;
- nfds++;
- log_fn(LOG_INFO,"new conn type %s, socket %d, nfds %d.",
- CONN_TYPE_TO_STRING(conn->type), conn->s, nfds);
- return 0;
- }
- /** Remove the connection from the global list, and remove the
- * corresponding poll entry. Calling this function will shift the last
- * connection (if any) into the position occupied by conn.
- */
- int connection_remove(connection_t *conn) {
- int current_index;
- tor_assert(conn);
- tor_assert(nfds>0);
- log_fn(LOG_INFO,"removing socket %d (type %s), nfds now %d",
- conn->s, CONN_TYPE_TO_STRING(conn->type), nfds-1);
- tor_assert(conn->poll_index >= 0);
- current_index = conn->poll_index;
- if (current_index == nfds-1) { /* this is the end */
- nfds--;
- return 0;
- }
- /* replace this one with the one at the end */
- nfds--;
- poll_array[current_index].fd = poll_array[nfds].fd;
- poll_array[current_index].events = poll_array[nfds].events;
- poll_array[current_index].revents = poll_array[nfds].revents;
- connection_array[current_index] = connection_array[nfds];
- connection_array[current_index]->poll_index = current_index;
- return 0;
- }
- /** Return true iff conn is in the current poll array. */
- int connection_in_array(connection_t *conn) {
- int i;
- for (i=0; i<nfds; ++i) {
- if (conn==connection_array[i])
- return 1;
- }
- return 0;
- }
- /** Set <b>*array</b> to an array of all connections, and <b>*n</b>
- * to the length of the array. <b>*array</b> and <b>*n</b> must not
- * be modified.
- */
- void get_connection_array(connection_t ***array, int *n) {
- *array = connection_array;
- *n = nfds;
- }
- /** Set the event mask on <b>conn</b> to <b>events</b>. (The form of
- * the event mask is as for poll().)
- */
- void connection_watch_events(connection_t *conn, short events) {
- tor_assert(conn);
- tor_assert(conn->poll_index >= 0);
- tor_assert(conn->poll_index < nfds);
- poll_array[conn->poll_index].events = events;
- }
- /** Return true iff <b>conn</b> is listening for read events. */
- int connection_is_reading(connection_t *conn) {
- tor_assert(conn);
- tor_assert(conn->poll_index >= 0);
- return poll_array[conn->poll_index].events & POLLIN;
- }
- /** Tell the main loop to stop notifying <b>conn</b> of any read events. */
- void connection_stop_reading(connection_t *conn) {
- tor_assert(conn);
- tor_assert(conn->poll_index >= 0);
- tor_assert(conn->poll_index < nfds);
- log(LOG_DEBUG,"connection_stop_reading() called.");
- poll_array[conn->poll_index].events &= ~POLLIN;
- }
- /** Tell the main loop to start notifying <b>conn</b> of any read events. */
- void connection_start_reading(connection_t *conn) {
- tor_assert(conn);
- tor_assert(conn->poll_index >= 0);
- tor_assert(conn->poll_index < nfds);
- poll_array[conn->poll_index].events |= POLLIN;
- }
- /** Return true iff <b>conn</b> is listening for write events. */
- int connection_is_writing(connection_t *conn) {
- return poll_array[conn->poll_index].events & POLLOUT;
- }
- /** Tell the main loop to stop notifying <b>conn</b> of any write events. */
- void connection_stop_writing(connection_t *conn) {
- tor_assert(conn);
- tor_assert(conn->poll_index >= 0);
- tor_assert(conn->poll_index < nfds);
- poll_array[conn->poll_index].events &= ~POLLOUT;
- }
- /** Tell the main loop to start notifying <b>conn</b> of any write events. */
- void connection_start_writing(connection_t *conn) {
- tor_assert(conn);
- tor_assert(conn->poll_index >= 0);
- tor_assert(conn->poll_index < nfds);
- poll_array[conn->poll_index].events |= POLLOUT;
- }
- /** Called when the connection at connection_array[i] has a read event,
- * or it has pending tls data waiting to be read: checks for validity,
- * catches numerous errors, and dispatches to connection_handle_read.
- */
- static void conn_read(int i) {
- connection_t *conn = connection_array[i];
- if (conn->marked_for_close)
- return;
- /* see http://www.greenend.org.uk/rjk/2001/06/poll.html for
- * discussion of POLLIN vs POLLHUP */
- if (!(poll_array[i].revents & (POLLIN|POLLHUP|POLLERR)))
- /* Sometimes read events get triggered for things that didn't ask
- * for them (XXX due to unknown poll wonkiness) and sometime we
- * want to read even though there was no read event (due to
- * pending TLS data).
- */
- /* XXX Post 0.0.9, we should rewrite this whole if statement;
- * something sane may result. Nick suspects that the || below
- * should be a &&.
- */
- if (!connection_is_reading(conn) ||
- !connection_has_pending_tls_data(conn))
- return; /* this conn should not read */
- log_fn(LOG_DEBUG,"socket %d wants to read.",conn->s);
- assert_connection_ok(conn, time(NULL));
- assert_all_pending_dns_resolves_ok();
- if (
- /* XXX does POLLHUP also mean it's definitely broken? */
- #ifdef MS_WINDOWS
- (poll_array[i].revents & POLLERR) ||
- #endif
- connection_handle_read(conn) < 0) {
- if (!conn->marked_for_close) {
- /* this connection is broken. remove it */
- log_fn(LOG_WARN,"Unhandled error on read for %s connection (fd %d); removing",
- CONN_TYPE_TO_STRING(conn->type), conn->s);
- connection_mark_for_close(conn);
- }
- }
- assert_connection_ok(conn, time(NULL));
- assert_all_pending_dns_resolves_ok();
- }
- /** Called when the connection at connection_array[i] has a write event:
- * checks for validity, catches numerous errors, and dispatches to
- * connection_handle_write.
- */
- static void conn_write(int i) {
- connection_t *conn;
- if (!(poll_array[i].revents & POLLOUT))
- return; /* this conn doesn't want to write */
- conn = connection_array[i];
- log_fn(LOG_DEBUG,"socket %d wants to write.",conn->s);
- if (conn->marked_for_close)
- return;
- assert_connection_ok(conn, time(NULL));
- assert_all_pending_dns_resolves_ok();
- if (connection_handle_write(conn) < 0) {
- if (!conn->marked_for_close) {
- /* this connection is broken. remove it. */
- log_fn(LOG_WARN,"Unhandled error on write for %s connection (fd %d); removing",
- CONN_TYPE_TO_STRING(conn->type), conn->s);
- conn->has_sent_end = 1; /* otherwise we cry wolf about duplicate close */
- /* XXX do we need a close-immediate here, so we don't try to flush? */
- connection_mark_for_close(conn);
- }
- }
- assert_connection_ok(conn, time(NULL));
- assert_all_pending_dns_resolves_ok();
- }
- /** If the connection at connection_array[i] is marked for close, then:
- * - If it has data that it wants to flush, try to flush it.
- * - If it _still_ has data to flush, and conn->hold_open_until_flushed is
- * true, then leave the connection open and return.
- * - Otherwise, remove the connection from connection_array and from
- * all other lists, close it, and free it.
- * If we remove the connection, then call conn_closed_if_marked at the new
- * connection at position i.
- */
- static void conn_close_if_marked(int i) {
- connection_t *conn;
- int retval;
- conn = connection_array[i];
- assert_connection_ok(conn, time(NULL));
- assert_all_pending_dns_resolves_ok();
- if (!conn->marked_for_close)
- return; /* nothing to see here, move along */
- log_fn(LOG_INFO,"Cleaning up connection (fd %d).",conn->s);
- if (conn->s >= 0 && connection_wants_to_flush(conn)) {
- /* -1 means it's an incomplete edge connection, or that the socket
- * has already been closed as unflushable. */
- if (!conn->hold_open_until_flushed)
- log_fn(LOG_INFO,
- "Conn (addr %s, fd %d, type %s, state %d) marked, but wants to flush %d bytes. "
- "(Marked at %s:%d)",
- conn->address, conn->s, CONN_TYPE_TO_STRING(conn->type), conn->state,
- (int)conn->outbuf_flushlen, conn->marked_for_close_file, conn->marked_for_close);
- if (connection_speaks_cells(conn)) {
- if (conn->state == OR_CONN_STATE_OPEN) {
- retval = flush_buf_tls(conn->tls, conn->outbuf, &conn->outbuf_flushlen);
- } else
- retval = -1; /* never flush non-open broken tls connections */
- } else {
- retval = flush_buf(conn->s, conn->outbuf, &conn->outbuf_flushlen);
- }
- if (retval >= 0 &&
- conn->hold_open_until_flushed && connection_wants_to_flush(conn)) {
- log_fn(LOG_INFO,"Holding conn (fd %d) open for more flushing.",conn->s);
- /* XXX should we reset timestamp_lastwritten here? */
- return;
- }
- if (connection_wants_to_flush(conn)) {
- log_fn(LOG_WARN,"Conn (addr %s, fd %d, type %s, state %d) still wants to flush. Losing %d bytes! (Marked at %s:%d)",
- conn->address, conn->s, CONN_TYPE_TO_STRING(conn->type), conn->state,
- (int)buf_datalen(conn->outbuf), conn->marked_for_close_file,
- conn->marked_for_close);
- }
- }
- /* if it's an edge conn, remove it from the list
- * of conn's on this circuit. If it's not on an edge,
- * flush and send destroys for all circuits on this conn
- */
- circuit_about_to_close_connection(conn);
- connection_about_to_close_connection(conn);
- connection_remove(conn);
- if (conn->type == CONN_TYPE_EXIT) {
- assert_connection_edge_not_dns_pending(conn);
- }
- connection_free(conn);
- if (i<nfds) { /* we just replaced the one at i with a new one.
- process it too. */
- conn_close_if_marked(i);
- }
- }
- /** This function is called whenever we successfully pull down a directory */
- void directory_has_arrived(time_t now) {
- or_options_t *options = get_options();
- log_fn(LOG_INFO, "A directory has arrived.");
- has_fetched_directory=1;
- /* Don't try to upload or download anything for a while
- * after the directory we had when we started.
- */
- if (!time_to_fetch_directory)
- time_to_fetch_directory = now + options->DirFetchPeriod;
- if (!time_to_force_upload_descriptor)
- time_to_force_upload_descriptor = now + options->DirPostPeriod;
- if (!time_to_fetch_running_routers)
- time_to_fetch_running_routers = now + options->StatusFetchPeriod;
- if (server_mode(options) &&
- !we_are_hibernating()) { /* connect to the appropriate routers */
- router_retry_connections();
- }
- }
- /** Perform regular maintenance tasks for a single connection. This
- * function gets run once per second per connection by run_housekeeping.
- */
- static void run_connection_housekeeping(int i, time_t now) {
- cell_t cell;
- connection_t *conn = connection_array[i];
- or_options_t *options = get_options();
- /* Expire any directory connections that haven't sent anything for 5 min */
- if (conn->type == CONN_TYPE_DIR &&
- !conn->marked_for_close &&
- conn->timestamp_lastwritten + 5*60 < now) {
- log_fn(LOG_INFO,"Expiring wedged directory conn (fd %d, purpose %d)", conn->s, conn->purpose);
- connection_mark_for_close(conn);
- return;
- }
- /* If we haven't written to an OR connection for a while, then either nuke
- the connection or send a keepalive, depending. */
- if (connection_speaks_cells(conn) &&
- now >= conn->timestamp_lastwritten + options->KeepalivePeriod) {
- routerinfo_t *router = router_get_by_digest(conn->identity_digest);
- if ((!connection_state_is_open(conn)) ||
- (we_are_hibernating() && !circuit_get_by_conn(conn)) ||
- (!clique_mode(options) && !circuit_get_by_conn(conn) &&
- (!router || !server_mode(options) || !router_is_clique_mode(router)))) {
- /* our handshake has expired; we're hibernating;
- * or we have no circuits and we're both either OPs or normal ORs,
- * then kill it. */
- log_fn(LOG_INFO,"Expiring connection to %d (%s:%d).",
- i,conn->address, conn->port);
- /* flush anything waiting, e.g. a destroy for a just-expired circ */
- connection_mark_for_close(conn);
- conn->hold_open_until_flushed = 1;
- } else {
- /* either in clique mode, or we've got a circuit. send a padding cell. */
- log_fn(LOG_DEBUG,"Sending keepalive to (%s:%d)",
- conn->address, conn->port);
- memset(&cell,0,sizeof(cell_t));
- cell.command = CELL_PADDING;
- connection_or_write_cell_to_buf(&cell, conn);
- }
- }
- }
- #define MIN_BW_TO_PUBLISH_DESC 5000 /* 5000 bytes/s sustained */
- #define MIN_UPTIME_TO_PUBLISH_DESC (30*60) /* half an hour */
- /** Decide if we're a publishable server or just a client. We are a server if:
- * - We have the AuthoritativeDirectory option set.
- * or
- * - We don't have the ClientOnly option set; and
- * - We have ORPort set; and
- * - We have been up for at least MIN_UPTIME_TO_PUBLISH_DESC seconds; and
- * - We have processed some suitable minimum bandwidth recently; and
- * - We believe we are reachable from the outside.
- */
- static int decide_if_publishable_server(time_t now) {
- int bw;
- or_options_t *options = get_options();
- bw = rep_hist_bandwidth_assess();
- router_set_bandwidth_capacity(bw);
- if (options->ClientOnly)
- return 0;
- if (!options->ORPort)
- return 0;
- /* XXX for now, you're only a server if you're a server */
- return server_mode(options);
- /* here, determine if we're reachable */
- if (0) { /* we've recently failed to reach our IP/ORPort from the outside */
- return 0;
- }
- if (bw < MIN_BW_TO_PUBLISH_DESC)
- return 0;
- if (options->AuthoritativeDir)
- return 1;
- if (stats_n_seconds_uptime < MIN_UPTIME_TO_PUBLISH_DESC)
- return 0;
- return 1;
- }
- /** Return true iff we believe ourselves to be an authoritative
- * directory server.
- */
- int authdir_mode(or_options_t *options) {
- return options->AuthoritativeDir != 0;
- }
- /** Return true iff we try to stay connected to all ORs at once.
- */
- int clique_mode(or_options_t *options) {
- return authdir_mode(options);
- }
- /** Return true iff we are trying to be a server.
- */
- int server_mode(or_options_t *options) {
- return (options->ORPort != 0 || options->ORBindAddress);
- }
- /** Remember if we've advertised ourselves to the dirservers. */
- static int server_is_advertised=0;
- /** Return true iff we have published our descriptor lately.
- */
- int advertised_server_mode(void) {
- return server_is_advertised;
- }
- /** Return true iff we are trying to be a socks proxy. */
- int proxy_mode(or_options_t *options) {
- return (options->SocksPort != 0 || options->SocksBindAddress);
- }
- /** Perform regular maintenance tasks. This function gets run once per
- * second by prepare_for_poll.
- */
- static void run_scheduled_events(time_t now) {
- static time_t last_rotated_certificate = 0;
- static time_t time_to_check_listeners = 0;
- static time_t time_to_check_descriptor = 0;
- or_options_t *options = get_options();
- int i;
- /** 0. See if we've been asked to shut down and our timeout has
- * expired; or if our bandwidth limits are exhausted and we
- * should hibernate; or if it's time to wake up from hibernation.
- */
- consider_hibernation(now);
- /** 1a. Every MIN_ONION_KEY_LIFETIME seconds, rotate the onion keys,
- * shut down and restart all cpuworkers, and update the directory if
- * necessary.
- */
- if (server_mode(options) &&
- get_onion_key_set_at()+MIN_ONION_KEY_LIFETIME < now) {
- log_fn(LOG_INFO,"Rotating onion key.");
- rotate_onion_key();
- cpuworkers_rotate();
- if (router_rebuild_descriptor(1)<0) {
- log_fn(LOG_WARN, "Couldn't rebuild router descriptor");
- }
- if (advertised_server_mode())
- router_upload_dir_desc_to_dirservers(0);
- }
- /** 1b. Every MAX_SSL_KEY_LIFETIME seconds, we change our TLS context. */
- if (!last_rotated_certificate)
- last_rotated_certificate = now;
- if (last_rotated_certificate+MAX_SSL_KEY_LIFETIME < now) {
- log_fn(LOG_INFO,"Rotating tls context.");
- if (tor_tls_context_new(get_identity_key(), 1, options->Nickname,
- MAX_SSL_KEY_LIFETIME) < 0) {
- log_fn(LOG_WARN, "Error reinitializing TLS context");
- }
- last_rotated_certificate = now;
- /* XXXX We should rotate TLS connections as well; this code doesn't change
- * XXXX them at all. */
- }
- /** 1c. If we have to change the accounting interval or record
- * bandwidth used in this accounting interval, do so. */
- if (accounting_is_enabled(options))
- accounting_run_housekeeping(now);
- /** 2. Periodically, we consider getting a new directory, getting a
- * new running-routers list, and/or force-uploading our descriptor
- * (if we've passed our internal checks). */
- if (time_to_fetch_directory < now) {
- /* purge obsolete entries */
- routerlist_remove_old_routers(ROUTER_MAX_AGE);
- if (authdir_mode(options)) {
- /* We're a directory; dump any old descriptors. */
- dirserv_remove_old_servers(ROUTER_MAX_AGE);
- }
- if (server_mode(options) && !we_are_hibernating()) {
- /* dirservers try to reconnect, in case connections have failed;
- * and normal servers try to reconnect to dirservers */
- router_retry_connections();
- }
- directory_get_from_dirserver(DIR_PURPOSE_FETCH_DIR, NULL);
- time_to_fetch_directory = now + options->DirFetchPeriod;
- if (time_to_fetch_running_routers < now + options->StatusFetchPeriod) {
- time_to_fetch_running_routers = now + options->StatusFetchPeriod;
- }
- /* Also, take this chance to remove old information from rephist. */
- rep_history_clean(now-24*60*60);
- }
- if (time_to_fetch_running_routers < now) {
- if (!authdir_mode(options)) {
- directory_get_from_dirserver(DIR_PURPOSE_FETCH_RUNNING_LIST, NULL);
- }
- time_to_fetch_running_routers = now + options->StatusFetchPeriod;
- }
- if (time_to_force_upload_descriptor < now) {
- if (decide_if_publishable_server(now)) {
- server_is_advertised = 1;
- router_rebuild_descriptor(1);
- router_upload_dir_desc_to_dirservers(1);
- } else {
- server_is_advertised = 0;
- }
- rend_cache_clean(); /* this should go elsewhere? */
- time_to_force_upload_descriptor = now + options->DirPostPeriod;
- }
- /* 2b. Once per minute, regenerate and upload the descriptor if the old
- * one is inaccurate. */
- if (time_to_check_descriptor < now) {
- time_to_check_descriptor = now + CHECK_DESCRIPTOR_INTERVAL;
- if (decide_if_publishable_server(now)) {
- server_is_advertised=1;
- router_rebuild_descriptor(0);
- router_upload_dir_desc_to_dirservers(0);
- } else {
- server_is_advertised=0;
- }
- }
- /** 3a. Every second, we examine pending circuits and prune the
- * ones which have been pending for more than a few seconds.
- * We do this before step 4, so it can try building more if
- * it's not comfortable with the number of available circuits.
- */
- circuit_expire_building(now);
- /** 3b. Also look at pending streams and prune the ones that 'began'
- * a long time ago but haven't gotten a 'connected' yet.
- * Do this before step 4, so we can put them back into pending
- * state to be picked up by the new circuit.
- */
- connection_ap_expire_beginning();
- /** 3c. And expire connections that we've held open for too long.
- */
- connection_expire_held_open();
- /** 3d. And every 60 seconds, we relaunch listeners if any died. */
- if (!we_are_hibernating() && time_to_check_listeners < now) {
- retry_all_listeners(0); /* 0 means "only if some died." */
- time_to_check_listeners = now+60;
- }
- /** 4. Every second, we try a new circuit if there are no valid
- * circuits. Every NewCircuitPeriod seconds, we expire circuits
- * that became dirty more than NewCircuitPeriod seconds ago,
- * and we make a new circ if there are no clean circuits.
- */
- if (has_fetched_directory && !we_are_hibernating())
- circuit_build_needed_circs(now);
- /** 5. We do housekeeping for each connection... */
- for (i=0;i<nfds;i++) {
- run_connection_housekeeping(i, now);
- }
- /** 6. And remove any marked circuits... */
- circuit_close_all_marked();
- /** 7. And upload service descriptors if necessary. */
- if (!we_are_hibernating())
- rend_consider_services_upload(now);
- /** 8. and blow away any connections that need to die. have to do this now,
- * because if we marked a conn for close and left its socket -1, then
- * we'll pass it to poll/select and bad things will happen.
- */
- for (i=0;i<nfds;i++)
- conn_close_if_marked(i);
- }
- /** Called every time we're about to call tor_poll. Increments statistics,
- * and adjusts token buckets. Returns the number of milliseconds to use for
- * the poll() timeout.
- */
- static int prepare_for_poll(void) {
- static long current_second = 0; /* from previous calls to gettimeofday */
- connection_t *conn;
- struct timeval now;
- int i;
- tor_gettimeofday(&now);
- if (now.tv_sec > current_second) {
- /* the second has rolled over. check more stuff. */
- size_t bytes_written;
- size_t bytes_read;
- int seconds_elapsed;
- bytes_written = stats_prev_global_write_bucket - global_write_bucket;
- bytes_read = stats_prev_global_read_bucket - global_read_bucket;
- seconds_elapsed = current_second ? (now.tv_sec - current_second) : 0;
- stats_n_bytes_read += bytes_read;
- stats_n_bytes_written += bytes_written;
- if (accounting_is_enabled(get_options()))
- accounting_add_bytes(bytes_read, bytes_written, seconds_elapsed);
- control_event_bandwidth_used((uint32_t)bytes_read,(uint32_t)bytes_written);
- connection_bucket_refill(&now);
- stats_prev_global_read_bucket = global_read_bucket;
- stats_prev_global_write_bucket = global_write_bucket;
- stats_n_seconds_uptime += seconds_elapsed;
- assert_all_pending_dns_resolves_ok();
- run_scheduled_events(now.tv_sec);
- assert_all_pending_dns_resolves_ok();
- current_second = now.tv_sec; /* remember which second it is, for next time */
- }
- for (i=0;i<nfds;i++) {
- conn = connection_array[i];
- if (connection_has_pending_tls_data(conn) &&
- connection_is_reading(conn)) {
- log_fn(LOG_DEBUG,"sock %d has pending bytes.",conn->s);
- return 0; /* has pending bytes to read; don't let poll wait. */
- }
- }
- return (1000 - (now.tv_usec / 1000)); /* how many milliseconds til the next second? */
- }
- /** Called when we get a SIGHUP: reload configuration files and keys,
- * retry all connections, re-upload all descriptors, and so on. */
- static int do_hup(void) {
- char keydir[512];
- or_options_t *options = get_options();
- log_fn(LOG_NOTICE,"Received sighup. Reloading config.");
- has_completed_circuit=0;
- if (accounting_is_enabled(options))
- accounting_record_bandwidth_usage(time(NULL));
- /* first, reload config variables, in case they've changed */
- /* no need to provide argc/v, they've been cached inside init_from_config */
- if (init_from_config(0, NULL) < 0) {
- log_fn(LOG_ERR,"Reading config failed--see warnings above. For usage, try -h.");
- return -1;
- }
- options = get_options();
- if (authdir_mode(options)) {
- /* reload the approved-routers file */
- tor_snprintf(keydir,sizeof(keydir),"%s/approved-routers", options->DataDirectory);
- log_fn(LOG_INFO,"Reloading approved fingerprints from %s...",keydir);
- if (dirserv_parse_fingerprint_file(keydir) < 0) {
- log_fn(LOG_WARN, "Error reloading fingerprints. Continuing with old list.");
- }
- }
- /* Fetch a new directory. Even authdirservers do this. */
- directory_get_from_dirserver(DIR_PURPOSE_FETCH_DIR, NULL);
- if (server_mode(options)) {
- /* Restart cpuworker and dnsworker processes, so they get up-to-date
- * configuration options. */
- cpuworkers_rotate();
- dnsworkers_rotate();
- /* Rebuild fresh descriptor. */
- router_rebuild_descriptor(1);
- tor_snprintf(keydir,sizeof(keydir),"%s/router.desc", options->DataDirectory);
- log_fn(LOG_INFO,"Saving descriptor to %s...",keydir);
- if (write_str_to_file(keydir, router_get_my_descriptor(), 0)) {
- return -1;
- }
- }
- return 0;
- }
- /** Tor main loop. */
- static int do_main_loop(void) {
- int i;
- int timeout;
- int poll_result;
- /* load the private keys, if we're supposed to have them, and set up the
- * TLS context. */
- if (! identity_key_is_set()) {
- if (init_keys() < 0) {
- log_fn(LOG_ERR,"Error initializing keys; exiting");
- return -1;
- }
- }
- /* Set up our buckets */
- connection_bucket_init();
- stats_prev_global_read_bucket = global_read_bucket;
- stats_prev_global_write_bucket = global_write_bucket;
- /* load the routers file, or assign the defaults. */
- if (router_reload_router_list()) {
- return -1;
- }
- if (authdir_mode(get_options())) {
- /* the directory is already here, run startup things */
- router_retry_connections();
- }
- if (server_mode(get_options())) {
- /* launch cpuworkers. Need to do this *after* we've read the onion key. */
- cpu_init();
- }
- for (;;) {
- #ifdef MS_WINDOWS_SERVICE /* Do service stuff only on windows. */
- if (service_status.dwCurrentState == SERVICE_STOP_PENDING) {
- service_status.dwWin32ExitCode = 0;
- service_status.dwCurrentState = SERVICE_STOPPED;
- SetServiceStatus(hStatus, &service_status);
- return 0;
- }
- #endif
- #ifndef MS_WINDOWS /* do signal stuff only on unix */
- if (please_shutdown) {
- if (!server_mode(get_options())) { /* do it now */
- log(LOG_NOTICE,"Interrupt: exiting cleanly.");
- tor_cleanup();
- exit(0);
- }
- hibernate_begin_shutdown();
- please_shutdown = 0;
- }
- if (please_sigpipe) {
- log(LOG_NOTICE,"Caught sigpipe. Ignoring.");
- please_sigpipe = 0;
- }
- if (please_dumpstats) {
- /* prefer to log it at INFO, but make sure we always see it */
- dumpstats(get_min_log_level()<LOG_INFO ? get_min_log_level() : LOG_INFO);
- please_dumpstats = 0;
- }
- if (please_debug) {
- switch_logs_debug();
- log(LOG_NOTICE,"Caught USR2. Going to loglevel debug.");
- please_debug = 0;
- }
- if (please_reset) {
- if (do_hup() < 0) {
- log_fn(LOG_WARN,"Restart failed (config error?). Exiting.");
- tor_cleanup();
- exit(1);
- }
- please_reset = 0;
- }
- if (please_reap_children) {
- while (waitpid(-1,NULL,WNOHANG) > 0) ; /* keep reaping until no more zombies */
- please_reap_children = 0;
- }
- #endif /* signal stuff */
- timeout = prepare_for_poll();
- /* poll until we have an event, or the second ends */
- poll_result = tor_poll(poll_array, nfds, timeout);
- /* let catch() handle things like ^c, and otherwise don't worry about it */
- if (poll_result < 0) {
- int e = tor_socket_errno(-1);
- /* let the program survive things like ^z */
- if (e != EINTR) {
- log_fn(LOG_ERR,"poll failed: %s [%d]",
- tor_socket_strerror(e), e);
- return -1;
- } else {
- log_fn(LOG_DEBUG,"poll interrupted.");
- /* You can't trust the results of this poll(). Go back to the
- * top of the big for loop. */
- continue;
- }
- }
- /* do all the reads and errors first, so we can detect closed sockets */
- for (i=0;i<nfds;i++)
- conn_read(i); /* this also marks broken connections */
- /* then do the writes */
- for (i=0;i<nfds;i++)
- conn_write(i);
- /* any of the conns need to be closed now? */
- for (i=0;i<nfds;i++)
- conn_close_if_marked(i);
- /* refilling buckets and sending cells happens at the beginning of the
- * next iteration of the loop, inside prepare_for_poll()
- */
- }
- }
- /** Unix signal handler. */
- static void catch(int the_signal) {
- #ifndef MS_WINDOWS /* do signal stuff only on unix */
- switch (the_signal) {
- // case SIGABRT:
- case SIGTERM:
- log(LOG_ERR,"Catching signal %d, exiting cleanly.", the_signal);
- tor_cleanup();
- exit(0);
- case SIGINT:
- please_shutdown = 1;
- break;
- case SIGPIPE:
- /* don't log here, since it's possible you got the sigpipe because
- * your log failed! */
- please_sigpipe = 1;
- break;
- case SIGHUP:
- please_reset = 1;
- break;
- case SIGUSR1:
- please_dumpstats = 1;
- break;
- case SIGUSR2:
- please_debug = 1;
- break;
- case SIGCHLD:
- please_reap_children = 1;
- break;
- #ifdef SIGXFSZ
- case SIGXFSZ: /* this happens when write fails with etoobig */
- break; /* ignore; write will fail and we'll look at errno. */
- #endif
- default:
- log(LOG_WARN,"Caught signal %d that we can't handle??", the_signal);
- tor_cleanup();
- exit(1);
- }
- #endif /* signal stuff */
- }
- /** Write all statistics to the log, with log level 'severity'. Called
- * in response to a SIGUSR1. */
- static void dumpstats(int severity) {
- int i;
- connection_t *conn;
- time_t now = time(NULL);
- log(severity, "Dumping stats:");
- for (i=0;i<nfds;i++) {
- conn = connection_array[i];
- log(severity, "Conn %d (socket %d) type %d (%s), state %d (%s), created %d secs ago",
- i, conn->s, conn->type, CONN_TYPE_TO_STRING(conn->type),
- conn->state, conn_state_to_string[conn->type][conn->state], (int)(now - conn->timestamp_created));
- if (!connection_is_listener(conn)) {
- log(severity,"Conn %d is to '%s:%d'.",i,conn->address, conn->port);
- log(severity,"Conn %d: %d bytes waiting on inbuf (last read %d secs ago)",i,
- (int)buf_datalen(conn->inbuf),
- (int)(now - conn->timestamp_lastread));
- log(severity,"Conn %d: %d bytes waiting on outbuf (last written %d secs ago)",i,
- (int)buf_datalen(conn->outbuf), (int)(now - conn->timestamp_lastwritten));
- }
- circuit_dump_by_conn(conn, severity); /* dump info about all the circuits using this conn */
- }
- log(severity,
- "Cells processed: %10lu padding\n"
- " %10lu create\n"
- " %10lu created\n"
- " %10lu relay\n"
- " (%10lu relayed)\n"
- " (%10lu delivered)\n"
- " %10lu destroy",
- stats_n_padding_cells_processed,
- stats_n_create_cells_processed,
- stats_n_created_cells_processed,
- stats_n_relay_cells_processed,
- stats_n_relay_cells_relayed,
- stats_n_relay_cells_delivered,
- stats_n_destroy_cells_processed);
- if (stats_n_data_cells_packaged)
- log(severity,"Average packaged cell fullness: %2.3f%%",
- 100*(((double)stats_n_data_bytes_packaged) /
- (stats_n_data_cells_packaged*RELAY_PAYLOAD_SIZE)) );
- if (stats_n_data_cells_received)
- log(severity,"Average delivered cell fullness: %2.3f%%",
- 100*(((double)stats_n_data_bytes_received) /
- (stats_n_data_cells_received*RELAY_PAYLOAD_SIZE)) );
- if (stats_n_seconds_uptime)
- log(severity,
- "Average bandwidth used: "U64_FORMAT"/%ld = %d bytes/sec",
- U64_PRINTF_ARG(stats_n_bytes_read),
- stats_n_seconds_uptime,
- (int) (stats_n_bytes_read/stats_n_seconds_uptime));
- rep_hist_dump_stats(now,severity);
- rend_service_dump_stats(severity);
- }
- /** Called before we make any calls to network-related functions.
- * (Some operating systems require their network libraries to be
- * initialized.) */
- static int network_init(void)
- {
- #ifdef MS_WINDOWS
- /* This silly exercise is necessary before windows will allow gethostbyname to work.
- */
- WSADATA WSAData;
- int r;
- r = WSAStartup(0x101,&WSAData);
- if (r) {
- log_fn(LOG_WARN,"Error initializing windows network layer: code was %d",r);
- return -1;
- }
- #endif
- return 0;
- }
- /** Called by exit() as we shut down the process.
- */
- static void exit_function(void)
- {
- /* NOTE: If we ever daemonize, this gets called immediately. That's
- * okay for now, because we only use this on Windows. */
- #ifdef MS_WINDOWS
- WSACleanup();
- #endif
- }
- /** Set up the signal handlers for either parent or child. */
- void handle_signals(int is_parent)
- {
- #ifndef MS_WINDOWS /* do signal stuff only on unix */
- struct sigaction action;
- action.sa_flags = 0;
- sigemptyset(&action.sa_mask);
- action.sa_handler = is_parent ? catch : SIG_IGN;
- sigaction(SIGINT, &action, NULL); /* do a controlled slow shutdown */
- sigaction(SIGTERM, &action, NULL); /* to terminate now */
- sigaction(SIGPIPE, &action, NULL); /* otherwise sigpipe kills us */
- sigaction(SIGUSR1, &action, NULL); /* dump stats */
- sigaction(SIGUSR2, &action, NULL); /* go to loglevel debug */
- sigaction(SIGHUP, &action, NULL); /* to reload config, retry conns, etc */
- #ifdef SIGXFSZ
- sigaction(SIGXFSZ, &action, NULL); /* handle file-too-big resource exhaustion */
- #endif
- if (is_parent)
- sigaction(SIGCHLD, &action, NULL); /* handle dns/cpu workers that exit */
- #endif /* signal stuff */
- }
- /** Main entry point for the Tor command-line client.
- */
- static int tor_init(int argc, char *argv[]) {
- /* Initialize the history structures. */
- rep_hist_init();
- /* Initialize the service cache. */
- rend_cache_init();
- client_dns_init(); /* Init the client dns cache. Do it always, since it's cheap. */
- /* give it somewhere to log to initially */
- add_temp_log();
- log_fn(LOG_NOTICE,"Tor v%s. This is experimental software. Do not rely on it for strong anonymity.",VERSION);
- if (network_init()<0) {
- log_fn(LOG_ERR,"Error initializing network; exiting.");
- return -1;
- }
- atexit(exit_function);
- if (init_from_config(argc,argv) < 0) {
- log_fn(LOG_ERR,"Reading config failed--see warnings above. For usage, try -h.");
- return -1;
- }
- #ifndef MS_WINDOWS
- if (geteuid()==0)
- log_fn(LOG_WARN,"You are running Tor as root. You don't need to, and you probably shouldn't.");
- #endif
- if (server_mode(get_options())) { /* only spawn dns handlers if we're a router */
- dns_init(); /* initialize the dns resolve tree, and spawn workers */
- }
- handle_signals(1);
- crypto_global_init();
- crypto_seed_rng();
- return 0;
- }
- /** Do whatever cleanup is necessary before shutting Tor down. */
- void tor_cleanup(void) {
- or_options_t *options = get_options();
- /* Remove our pid file. We don't care if there was an error when we
- * unlink, nothing we could do about it anyways. */
- if (options->PidFile && options->command == CMD_RUN_TOR)
- unlink(options->PidFile);
- crypto_global_cleanup();
- if (accounting_is_enabled(options))
- accounting_record_bandwidth_usage(time(NULL));
- }
- /** Read/create keys as needed, and echo our fingerprint to stdout. */
- static void do_list_fingerprint(void)
- {
- char buf[FINGERPRINT_LEN+1];
- crypto_pk_env_t *k;
- const char *nickname = get_options()->Nickname;
- if (!server_mode(get_options())) {
- printf("Clients don't have long-term identity keys. Exiting.\n");
- return;
- }
- tor_assert(nickname);
- if (init_keys() < 0) {
- log_fn(LOG_ERR,"Error initializing keys; exiting");
- return;
- }
- if (!(k = get_identity_key())) {
- log_fn(LOG_ERR,"Error: missing identity key.");
- return;
- }
- if (crypto_pk_get_fingerprint(k, buf, 1)<0) {
- log_fn(LOG_ERR, "Error computing fingerprint");
- return;
- }
- printf("%s %s\n", nickname, buf);
- }
- /** Entry point for password hashing: take the desired password from
- * the command line, and print its salted hash to stdout. **/
- static void do_hash_password(void)
- {
- char output[256];
- char key[S2K_SPECIFIER_LEN+DIGEST_LEN];
- crypto_rand(key, S2K_SPECIFIER_LEN-1);
- key[S2K_SPECIFIER_LEN-1] = (uint8_t)96; /* Hash 64 K of data. */
- secret_to_key(key+S2K_SPECIFIER_LEN, DIGEST_LEN,
- get_options()->command_arg, strlen(get_options()->command_arg),
- key);
- if (base64_encode(output, sizeof(output), key, sizeof(key))<0) {
- log_fn(LOG_ERR, "Unable to compute base64");
- } else {
- printf("%s",output);
- }
- }
- #ifdef MS_WINDOWS_SERVICE
- void nt_service_control(DWORD request)
- {
- switch (request) {
- case SERVICE_CONTROL_STOP:
- case SERVICE_CONTROL_SHUTDOWN:
- log(LOG_ERR, "Got stop/shutdown request; shutting down cleanly.");
- service_status.dwCurrentState = SERVICE_STOP_PENDING;
- return;
- }
- SetServiceStatus(hStatus, &service_status);
- }
- void nt_service_body(int argc, char **argv)
- {
- int err;
- FILE *f;
- service_status.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
- service_status.dwCurrentState = SERVICE_START_PENDING;
- service_status.dwControlsAccepted =
- SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_SHUTDOWN;
- service_status.dwWin32ExitCode = 0;
- service_status.dwServiceSpecificExitCode = 0;
- service_status.dwCheckPoint = 0;
- service_status.dwWaitHint = 1000;
- hStatus = RegisterServiceCtrlHandler(GENSRV_SERVICENAME, (LPHANDLER_FUNCTION) nt_service_control);
- if (hStatus == 0) {
- // failed;
- return;
- }
- err = tor_init(backup_argc, backup_argv); // refactor this part out of tor_main and do_main_loop
- if (err) {
- // failed.
- service_status.dwCurrentState = SERVICE_STOPPED;
- service_status.dwWin32ExitCode = -1;
- SetServiceStatus(hStatus, &service_status);
- return;
- }
- service_status.dwCurrentState = SERVICE_RUNNING;
- SetServiceStatus(hStatus, &service_status);
- do_main_loop();
- tor_cleanup();
- return;
- }
- void nt_service_main(void)
- {
- SERVICE_TABLE_ENTRY table[2];
- DWORD result = 0;
- table[0].lpServiceName = GENSRV_SERVICENAME;
- table[0].lpServiceProc = (LPSERVICE_MAIN_FUNCTION)nt_service_body;
- table[1].lpServiceName = NULL;
- table[1].lpServiceProc = NULL;
- if (!StartServiceCtrlDispatcher(table)) {
- result = GetLastError();
- printf("Error was %d\n",result);
- if (result == ERROR_FAILED_SERVICE_CONTROLLER_CONNECT) {
- if (tor_init(backup_argc, backup_argv) < 0)
- return;
- switch (get_options()->command) {
- case CMD_RUN_TOR:
- do_main_loop();
- break;
- case CMD_LIST_FINGERPRINT:
- do_list_fingerprint();
- break;
- case CMD_HASH_PASSWORD:
- do_hash_password();
- break;
- default:
- log_fn(LOG_ERR, "Illegal command number %d: internal error.", get_options()->command);
- }
- tor_cleanup();
- }
- }
- }
- int nt_service_install()
- {
- /* XXXX Problems with NT services:
- * 1. The configuration file needs to be in the same directory as the .exe
- * 2. The exe and the configuration file can't be on any directory path
- * that contains a space.
- * 3. Ideally, there should be one EXE that can either run as a
- * separate process (as now) or that can install and run itself
- * as an NT service. I have no idea how hard this is.
- *
- * Notes about develiping NT services:
- *
- * 1. Don't count on your CWD. If an abolute path is not given, the
- * fopen() function goes wrong.
- * 2. The parameters given to the nt_service_body() function differ
- * from those given to main() function.
- */
- SC_HANDLE hSCManager = NULL;
- SC_HANDLE hService = NULL;
- TCHAR szPath[_MAX_PATH];
- TCHAR szDrive[_MAX_DRIVE];
- TCHAR szDir[_MAX_DIR];
- char cmd1[] = " -f ";
- char cmd2[] = "\\torrc";
- char *command;
- int len = 0;
- if (0 == GetModuleFileName(NULL, szPath, MAX_PATH))
- return 0;
- _tsplitpath(szPath, szDrive, szDir, NULL, NULL);
- len = _MAX_PATH + strlen(cmd1) + _MAX_DRIVE + _MAX_DIR + strlen(cmd2);
- command = tor_malloc(len);
- strlcpy(command, szPath, len);
- strlcat(command, " -f ", len);
- strlcat(command, szDrive, len);
- strlcat(command, szDir, len);
- strlcat(command, "\\torrc", len);
- if ((hSCManager = OpenSCManager(NULL, NULL, SC_MANAGER_CREATE_SERVICE)) == NULL) {
- printf("Failed: OpenSCManager()\n");
- free(command);
- return 0;
- }
- if ((hService = CreateService(hSCManager, GENSRV_SERVICENAME, GENSRV_DISPLAYNAME,
- SERVICE_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS,
- SERVICE_DEMAND_START, SERVICE_ERROR_IGNORE, command,
- NULL, NULL, NULL, NULL, NULL)) == NULL) {
- printf("Failed: CreateService()\n");
- CloseServiceHandle(hSCManager);
- free(command);
- return 0;
- }
- CloseServiceHandle(hService);
- CloseServiceHandle(hSCManager);
- free(command);
- printf("Install service successfully\n");
- return 0;
- }
- int nt_service_remove()
- {
- SC_HANDLE hSCManager = NULL;
- SC_HANDLE hService = NULL;
- SERVICE_STATUS service_status;
- BOOL result = FALSE;
- if ((hSCManager = OpenSCManager(NULL, NULL, SC_MANAGER_CREATE_SERVICE)) == NULL) {
- printf("Failed: OpenSCManager()\n");
- return 0;
- }
- if ((hService = OpenService(hSCManager, GENSRV_SERVICENAME, SERVICE_ALL_ACCESS)) == NULL) {
- printf("Failed: OpenService()\n");
- CloseServiceHandle(hSCManager);
- }
- result = ControlService(hService, SERVICE_CONTROL_STOP, &service_status);
- if (result) {
- while (QueryServiceStatus(hService, &service_status))
- {
- if (service_status.dwCurrentState == SERVICE_STOP_PENDING)
- Sleep(500);
- else
- break;
- }
- if (DeleteService(hService))
- printf("Remove service successfully\n");
- else
- printf("Failed: DeleteService()\n");
- } else {
- result = DeleteService(hService);
- if (result)
- printf("Remove service successfully\n");
- else
- printf("Failed: DeleteService()\n");
- }
- CloseServiceHandle(hService);
- CloseServiceHandle(hSCManager);
- return 0;
- }
- #endif
- int tor_main(int argc, char *argv[]) {
- #ifdef MS_WINDOWS_SERVICE
- backup_argv = argv;
- backup_argc = argc;
- if ((argc >= 2) && !strcmp(argv[1], "-install"))
- return nt_service_install();
- if ((argc >= 2) && !strcmp(argv[1], "-remove"))
- return nt_service_remove();
- nt_service_main();
- return 0;
- #else
- if (tor_init(argc, argv)<0)
- return -1;
- switch (get_options()->command) {
- case CMD_RUN_TOR:
- do_main_loop();
- break;
- case CMD_LIST_FINGERPRINT:
- do_list_fingerprint();
- break;
- case CMD_HASH_PASSWORD:
- do_hash_password();
- break;
- default:
- log_fn(LOG_ERR, "Illegal command number %d: internal error.",
- get_options()->command);
- }
- tor_cleanup();
- return -1;
- #endif
- }
|