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- /* Copyright 2001,2002,2003 Roger Dingledine, Matej Pfajfar. */
- /* See LICENSE for licensing information */
- /* $Id$ */
- #include "or.h"
- /********* PROTOTYPES **********/
- static void dumpstats(int severity); /* log stats */
- static int init_from_config(int argc, char **argv);
- /********* START VARIABLES **********/
- extern char *conn_state_to_string[][_CONN_TYPE_MAX+1];
- or_options_t options; /* command-line and config-file options */
- int global_read_bucket; /* max number of bytes I can read this second */
- static int stats_prev_global_read_bucket;
- static uint64_t stats_n_bytes_read = 0;
- static long stats_n_seconds_reading = 0;
- static connection_t *connection_array[MAXCONNECTIONS] =
- { NULL };
- 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_reset=0; /* whether we just got a sighup */
- static int please_reap_children=0; /* whether we should waitpid for exited children */
- #endif /* signal stuff */
- int has_fetched_directory=0;
- /* 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_completed_circuit=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. */
- /********* 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).
- *
- ****************************************************************************/
- int connection_add(connection_t *conn) {
- if(nfds >= options.MaxConn-1) {
- log_fn(LOG_WARN,"failing because nfds is too high.");
- return -1;
- }
- conn->poll_index = nfds;
- connection_set_poll_socket(conn);
- connection_array[nfds] = conn;
- /* 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;
- }
- void connection_set_poll_socket(connection_t *conn) {
- poll_array[conn->poll_index].fd = conn->s;
- }
- /* 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;
- assert(conn);
- 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);
- /* 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);
- 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;
- }
- void get_connection_array(connection_t ***array, int *n) {
- *array = connection_array;
- *n = nfds;
- }
- void connection_watch_events(connection_t *conn, short events) {
- assert(conn && conn->poll_index < nfds);
- poll_array[conn->poll_index].events = events;
- }
- int connection_is_reading(connection_t *conn) {
- return poll_array[conn->poll_index].events & POLLIN;
- }
- void connection_stop_reading(connection_t *conn) {
- assert(conn && conn->poll_index < nfds);
- log(LOG_DEBUG,"connection_stop_reading() called.");
- if(poll_array[conn->poll_index].events & POLLIN)
- poll_array[conn->poll_index].events -= POLLIN;
- }
- void connection_start_reading(connection_t *conn) {
- assert(conn && conn->poll_index < nfds);
- poll_array[conn->poll_index].events |= POLLIN;
- }
- int connection_is_writing(connection_t *conn) {
- return poll_array[conn->poll_index].events & POLLOUT;
- }
- void connection_stop_writing(connection_t *conn) {
- assert(conn && conn->poll_index < nfds);
- if(poll_array[conn->poll_index].events & POLLOUT)
- poll_array[conn->poll_index].events -= POLLOUT;
- }
- void connection_start_writing(connection_t *conn) {
- assert(conn && conn->poll_index < nfds);
- poll_array[conn->poll_index].events |= POLLOUT;
- }
- 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)))
- 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));
- 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 */
- /* XXX This shouldn't ever happen anymore. */
- /* XXX but it'll clearly happen on MS_WINDOWS from POLLERR, right? */
- log_fn(LOG_ERR,"Unhandled error on read for %s connection (fd %d); removing",
- CONN_TYPE_TO_STRING(conn->type), conn->s);
- connection_mark_for_close(conn,0);
- }
- }
- assert_connection_ok(conn, time(NULL));
- }
- 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));
- if (connection_handle_write(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);
- conn->has_sent_end = 1; /* otherwise we cry wolf about duplicate close */
- connection_mark_for_close(conn,0);
- }
- }
- assert_connection_ok(conn, time(NULL));
- }
- static void conn_close_if_marked(int i) {
- connection_t *conn;
- int retval;
- conn = connection_array[i];
- assert_connection_ok(conn, time(NULL));
- 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_WARN,
- "Conn (fd %d, type %s, state %d) marked, but wants to flush %d bytes. "
- "(Marked at %s:%d)",
- conn->s, CONN_TYPE_TO_STRING(conn->type), conn->state,
- 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);
- /* XXX actually, some non-zero results are maybe ok. which ones? */
- } 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 (fd %d, type %s, state %d) still wants to flush. Losing %d bytes! (Marked at %s:%d)",
- conn->s, CONN_TYPE_TO_STRING(conn->type), conn->state,
- (int)buf_datalen(conn->outbuf), conn->marked_for_close_file,
- conn->marked_for_close);
- }
- }
- 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);
- }
- }
- void directory_has_arrived(void) {
- log_fn(LOG_INFO, "We now have a directory.");
- /* just for testing */
- // directory_initiate_command(router_pick_directory_server(),
- // DIR_PURPOSE_FETCH_RENDDESC, "foo", 3);
- rend_services_init(); /* get bob to initialize all his hidden services */
- }
- /* 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];
- /* check connections to see whether we should send a keepalive, expire, or wait */
- if(!connection_speaks_cells(conn))
- return;
- if(now >= conn->timestamp_lastwritten + options.KeepalivePeriod) {
- if((!options.ORPort && !circuit_get_by_conn(conn)) ||
- (!connection_state_is_open(conn))) {
- /* we're an onion proxy, with no circuits; or our handshake has expired. 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,CLOSE_REASON_UNUSED_OR_CONN);
- conn->hold_open_until_flushed = 1;
- } else {
- /* either a full router, 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);
- }
- }
- }
- /* Perform regular maintenance tasks. This function gets run once per
- * second by prepare_for_poll.
- */
- static void run_scheduled_events(time_t now) {
- static long time_to_fetch_directory = 0;
- static long time_to_new_circuit = 0;
- circuit_t *circ;
- int i;
- /* 1. Every DirFetchPostPeriod seconds, we get a new directory and upload
- * our descriptor (if any). */
- if(time_to_fetch_directory < now) {
- /* it's time to fetch a new directory and/or post our descriptor */
- if(has_fetched_directory)
- rend_services_init(); /* make new intro points and re-upload if necessary */
- if(options.ORPort) {
- router_rebuild_descriptor();
- router_upload_dir_desc_to_dirservers();
- }
- if(!options.DirPort) {
- /* NOTE directory servers do not currently fetch directories.
- * Hope this doesn't bite us later. */
- directory_initiate_command(router_pick_directory_server(),
- DIR_PURPOSE_FETCH_DIR, NULL, 0);
- } else {
- /* We're a directory; dump any old descriptors. */
- dirserv_remove_old_servers();
- }
- rend_cache_clean(); /* should this go elsewhere? */
- time_to_fetch_directory = now + options.DirFetchPostPeriod;
- }
- /* 2. Every second, we examine pending circuits and prune the
- * ones which have been pending for more than 3 seconds.
- * We do this before step 3, so it can try building more if
- * it's not comfortable with the number of available circuits.
- */
- circuit_expire_building();
- /* 2b. 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 3, so we can put them back into pending
- * state to be picked up by the new circuit.
- */
- connection_ap_expire_beginning();
- /* 2c. And expire connections that we've held open for too long.
- */
- connection_expire_held_open();
- /* 3. 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 &&
- (options.SocksPort || options.RunTesting)) {
- if (options.SocksPort)
- /* launch a new circ for any pending streams that need one */
- connection_ap_attach_pending();
- /* Build a new test circuit every 5 minutes */
- #define TESTING_CIRCUIT_INTERVAL 300
- circ = circuit_get_best(NULL, 1, CIRCUIT_PURPOSE_C_GENERAL);
- if(time_to_new_circuit < now) {
- client_dns_clean();
- circuit_expire_unused_circuits();
- circuit_reset_failure_count();
- if(circ && circ->timestamp_dirty) {
- log_fn(LOG_INFO,"Youngest circuit dirty; launching replacement.");
- /* make a new circuit */
- circuit_launch_new(CIRCUIT_PURPOSE_C_GENERAL, NULL);
- } else if (options.RunTesting && circ &&
- circ->timestamp_created + TESTING_CIRCUIT_INTERVAL < now) {
- log_fn(LOG_INFO,"Creating a new testing circuit.");
- circuit_launch_new(CIRCUIT_PURPOSE_C_GENERAL, NULL);
- }
- time_to_new_circuit = now + options.NewCircuitPeriod;
- }
- #define CIRCUIT_MIN_BUILDING 3
- if(!circ && circuit_count_building() < CIRCUIT_MIN_BUILDING) {
- /* if there's no open circ, and less than 3 are on the way,
- * go ahead and try another.
- */
- circuit_launch_new(CIRCUIT_PURPOSE_C_GENERAL, NULL);
- }
- }
- /* 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 blow away any connections that need to die. can't do this later
- * because we might open up a circuit and not realize we're about to cull
- * the connection it's running over.
- * XXX we can remove this step once we audit circuit-building to make sure
- * it doesn't pick a marked-for-close conn. -RD
- */
- for(i=0;i<nfds;i++)
- conn_close_if_marked(i);
- }
- 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);
- /* Check how much bandwidth we've consumed,
- * and increment the token buckets. */
- stats_n_bytes_read += stats_prev_global_read_bucket-global_read_bucket;
- connection_bucket_refill(&now);
- stats_prev_global_read_bucket = global_read_bucket;
- if(now.tv_sec > current_second) { /* the second has rolled over. check more stuff. */
- ++stats_n_seconds_reading;
- run_scheduled_events(now.tv_sec);
- 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? */
- }
- static int init_from_config(int argc, char **argv) {
- if(getconfig(argc,argv,&options)) {
- log_fn(LOG_ERR,"Reading config failed. For usage, try -h.");
- return -1;
- }
- close_logs(); /* we'll close, then open with correct loglevel if necessary */
- if(options.User || options.Group) {
- if(switch_id(options.User, options.Group) != 0) {
- return -1;
- }
- }
- if (options.RunAsDaemon) {
- start_daemon(options.DataDirectory);
- }
- if(!options.LogFile && !options.RunAsDaemon)
- add_stream_log(options.loglevel, "<stdout>", stdout);
- if(options.LogFile) {
- if (add_file_log(options.loglevel, options.LogFile) != 0) {
- /* opening the log file failed! Use stderr and log a warning */
- add_stream_log(options.loglevel, "<stderr>", stderr);
- log_fn(LOG_WARN, "Cannot write to LogFile '%s': %s.", options.LogFile, strerror(errno));
- }
- log_fn(LOG_NOTICE, "Successfully opened LogFile '%s', redirecting output.",
- options.LogFile);
- }
- if(options.DebugLogFile) {
- if (add_file_log(LOG_DEBUG, options.DebugLogFile) != 0)
- log_fn(LOG_WARN, "Cannot write to DebugLogFile '%s': %s.", options.DebugLogFile, strerror(errno));
- log_fn(LOG_DEBUG, "Successfully opened DebugLogFile '%s'.", options.DebugLogFile);
- }
- connection_bucket_init();
- stats_prev_global_read_bucket = global_read_bucket;
- if(options.RunAsDaemon) {
- /* XXXX Can we delay this any more? */
- finish_daemon();
- }
- /* write our pid to the pid file, if we do not have write permissions we will log a warning */
- if(options.PidFile)
- write_pidfile(options.PidFile);
- return 0;
- }
- static int do_hup(void) {
- char keydir[512];
- log_fn(LOG_NOTICE,"Received sighup. Reloading config.");
- has_completed_circuit=0;
- /* 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) {
- exit(1);
- }
- if(retry_all_connections() < 0) {
- log_fn(LOG_ERR,"Failed to bind one of the listener ports.");
- return -1;
- }
- if(options.DirPort) {
- /* reload the approved-routers file */
- sprintf(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.");
- }
- } else {
- /* fetch a new directory */
- directory_initiate_command(router_pick_directory_server(),
- DIR_PURPOSE_FETCH_DIR, NULL, 0);
- }
- if(options.ORPort) {
- router_rebuild_descriptor();
- sprintf(keydir,"%s/router.desc", options.DataDirectory);
- log_fn(LOG_INFO,"Dumping descriptor to %s...",keydir);
- if (write_str_to_file(keydir, router_get_my_descriptor())) {
- return -1;
- }
- }
- return 0;
- }
- static int do_main_loop(void) {
- int i;
- int timeout;
- int poll_result;
- /* Initialize the history structures. */
- rep_hist_init();
- /* Intialize the service cache. */
- rend_cache_init();
- /* load the private keys, if we're supposed to have them, and set up the
- * TLS context. */
- if (init_keys() < 0 || rend_service_init_keys() < 0) {
- log_fn(LOG_ERR,"Error initializing keys; exiting");
- return -1;
- }
- /* load the routers file */
- if(options.RouterFile &&
- router_set_routerlist_from_file(options.RouterFile) < 0) {
- log_fn(LOG_ERR,"Error loading router list.");
- return -1;
- }
- if(options.DirPort) { /* the directory is already here, run startup things */
- has_fetched_directory = 1;
- directory_has_arrived();
- }
- if(options.ORPort) {
- cpu_init(); /* launch cpuworkers. Need to do this *after* we've read the onion key. */
- }
- /* start up the necessary connections based on which ports are
- * non-zero. This is where we try to connect to all the other ORs,
- * and start the listeners.
- */
- if(retry_all_connections() < 0) {
- log_fn(LOG_ERR,"Failed to bind one of the listener ports.");
- return -1;
- }
- for(;;) {
- #ifndef MS_WINDOWS /* do signal stuff only on unix */
- if(please_dumpstats) {
- /* prefer to log it at INFO, but make sure we always see it */
- dumpstats(options.loglevel>LOG_INFO ? options.loglevel : LOG_INFO);
- please_dumpstats = 0;
- }
- if(please_reset) {
- do_hup();
- please_reset = 0;
- }
- if(please_reap_children) {
- while(waitpid(-1,NULL,WNOHANG)) ; /* 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) {
- if(errno != EINTR) { /* let the program survive things like ^z */
- log_fn(LOG_ERR,"poll failed: %s",strerror(errno));
- return -1;
- } else {
- log_fn(LOG_DEBUG,"poll interrupted.");
- }
- }
- /* 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()
- */
- }
- }
- static void catch(int the_signal) {
- #ifndef MS_WINDOWS /* do signal stuff only on unix */
- switch(the_signal) {
- // case SIGABRT:
- case SIGTERM:
- case SIGINT:
- log(LOG_ERR,"Catching signal %d, exiting cleanly.", the_signal);
- /* we don't care if there was an error when we unlink, nothing
- we could do about it anyways */
- if(options.PidFile)
- unlink(options.PidFile);
- exit(0);
- case SIGPIPE:
- log(LOG_WARN,"Bug: caught sigpipe. Ignoring.");
- break;
- case SIGHUP:
- please_reset = 1;
- break;
- case SIGUSR1:
- please_dumpstats = 1;
- break;
- case SIGCHLD:
- please_reap_children = 1;
- break;
- default:
- log(LOG_WARN,"Caught signal %d that we can't handle??", the_signal);
- }
- #endif /* signal stuff */
- }
- 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 %ld secs ago",
- i, conn->s, conn->type, CONN_TYPE_TO_STRING(conn->type),
- conn->state, conn_state_to_string[conn->type][conn->state], 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 %ld secs ago)",i,
- (int)buf_datalen(conn->inbuf),
- now - conn->timestamp_lastread);
- log(severity,"Conn %d: %d bytes waiting on outbuf (last written %ld secs ago)",i,
- (int)buf_datalen(conn->outbuf), 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_reading)
- log(severity,"Average bandwidth used: %d bytes/sec",
- (int) (stats_n_bytes_read/stats_n_seconds_reading));
- rep_hist_dump_stats(now,severity);
- }
- 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;
- }
- /* XXXX We should call WSACleanup on exit, I think. */
- #endif
- return 0;
- }
- void exit_function(void)
- {
- #ifdef MS_WINDOWS
- WSACleanup();
- #endif
- }
- int tor_main(int argc, char *argv[]) {
- /* give it somewhere to log to initially */
- add_stream_log(LOG_INFO, "<stdout>", stdout);
- log_fn(LOG_NOTICE,"Tor v%s. This is experimental software. Do not use it if you need 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)
- 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(options.ORPort) { /* only spawn dns handlers if we're a router */
- dns_init(); /* initialize the dns resolve tree, and spawn workers */
- }
- if(options.SocksPort) {
- client_dns_init(); /* init the client dns cache */
- }
- #ifndef MS_WINDOWS /* do signal stuff only on unix */
- {
- struct sigaction action;
- action.sa_flags = 0;
- sigemptyset(&action.sa_mask);
- action.sa_handler = catch;
- sigaction(SIGINT, &action, NULL);
- sigaction(SIGTERM, &action, NULL);
- sigaction(SIGPIPE, &action, NULL);
- sigaction(SIGUSR1, &action, NULL);
- sigaction(SIGHUP, &action, NULL); /* to reload config, retry conns, etc */
- sigaction(SIGCHLD, &action, NULL); /* handle dns/cpu workers that exit */
- }
- #endif /* signal stuff */
- crypto_global_init();
- crypto_seed_rng();
- do_main_loop();
- crypto_global_cleanup();
- return -1;
- }
- /*
- Local Variables:
- mode:c
- indent-tabs-mode:nil
- c-basic-offset:2
- End:
- */
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