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- /* Copyright 2001,2002,2003 Roger Dingledine, Matej Pfajfar. */
- /* See LICENSE for licensing information */
- /* $Id$ */
- #include "or.h"
- /********* START PROTOTYPES **********/
- static void dumpstats(int severity); /* log stats */
- /********* START VARIABLES **********/
- extern char *conn_type_to_string[];
- 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 */
- /* private keys */
- static crypto_pk_env_t *onionkey=NULL;
- static crypto_pk_env_t *linkkey=NULL;
- static crypto_pk_env_t *identitykey=NULL;
- /********* END VARIABLES ************/
- void set_onion_key(crypto_pk_env_t *k) {
- onionkey = k;
- }
- crypto_pk_env_t *get_onion_key(void) {
- assert(onionkey);
- return onionkey;
- }
- void set_link_key(crypto_pk_env_t *k)
- {
- linkkey = k;
- }
- crypto_pk_env_t *get_link_key(void)
- {
- assert(linkkey);
- return linkkey;
- }
- void set_identity_key(crypto_pk_env_t *k) {
- identitykey = k;
- }
- crypto_pk_env_t *get_identity_key(void) {
- assert(identitykey);
- return identitykey;
- }
- /****************************************************************************
- *
- * 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(LOG_WARN,"connection_add(): 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(LOG_INFO,"connection_add(): new conn type %d, socket %d, nfds %d.",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(LOG_INFO,"connection_remove(): removing socket %d, nfds now %d",conn->s, 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;
- }
- /* we replace this one with the one at the end, then free it */
- 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;
- }
- 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];
- /* 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)
- {
- /* this connection is broken. remove it */
- log_fn(LOG_INFO,"%s connection broken, removing.", conn_type_to_string[conn->type]);
- connection_remove(conn);
- connection_free(conn);
- if(i<nfds) { /* we just replaced the one at i with a new one. process it too. */
- conn_read(i);
- }
- } else 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);
- assert_connection_ok(conn, time(NULL));
- if(connection_handle_write(conn) < 0) { /* this connection is broken. remove it. */
- log_fn(LOG_INFO,"%s connection broken, removing.", conn_type_to_string[conn->type]);
- connection_remove(conn);
- connection_free(conn);
- if(i<nfds) { /* we just replaced the one at i with a new one. process it too. */
- conn_write(i);
- }
- } else assert_connection_ok(conn, time(NULL));
- }
- static void conn_close_if_marked(int i) {
- connection_t *conn;
- conn = connection_array[i];
- assert_connection_ok(conn, time(NULL));
- if(conn->marked_for_close) {
- log_fn(LOG_INFO,"Cleaning up connection (fd %d).",conn->s);
- if(conn->s >= 0) { /* might be an incomplete edge connection */
- /* FIXME there's got to be a better way to check for this -- and make other checks? */
- if(connection_speaks_cells(conn)) {
- if(conn->state == OR_CONN_STATE_OPEN)
- flush_buf_tls(conn->tls, conn->outbuf, &conn->outbuf_flushlen);
- } else {
- flush_buf(conn->s, conn->outbuf, &conn->outbuf_flushlen);
- }
- if(connection_wants_to_flush(conn)) /* not done flushing */
- log_fn(LOG_WARN,"Conn (socket %d) still wants to flush. Losing %d bytes!",conn->s, (int)buf_datalen(conn->inbuf));
- }
- connection_remove(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);
- }
- }
- }
- /* 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];
- if(connection_receiver_bucket_should_increase(conn)) {
- conn->receiver_bucket += conn->bandwidth;
- // log_fn(LOG_DEBUG,"Receiver bucket %d now %d.", i, conn->receiver_bucket);
- }
- if(conn->wants_to_read == 1 /* it's marked to turn reading back on now */
- && global_read_bucket > 0 /* and we're allowed to read */
- && (!connection_speaks_cells(conn) || conn->receiver_bucket > 0)) {
- /* and either a non-cell conn or a cell conn with non-empty bucket */
- conn->wants_to_read = 0;
- connection_start_reading(conn);
- if(conn->wants_to_write == 1) {
- conn->wants_to_write = 0;
- connection_start_writing(conn);
- }
- }
-
- /* 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.OnionRouter && !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);
- conn->marked_for_close = 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(options.OnionRouter) {
- router_rebuild_descriptor();
- router_upload_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_CONN_STATE_CONNECTING_FETCH);
- }
- time_to_fetch_directory = now + options.DirFetchPostPeriod;
- }
- /* 2. Every NewCircuitPeriod seconds, we expire old circuits and make a
- * new one as needed.
- */
- if(options.APPort && time_to_new_circuit < now) {
- circuit_expire_unused_circuits();
- circuit_launch_new(-1); /* tell it to forget about previous failures */
- circ = circuit_get_newest_open();
- if(!circ || circ->dirty) {
- log_fn(LOG_INFO,"Youngest circuit %s; launching replacement.", circ ? "dirty" : "missing");
- circuit_launch_new(0); /* make an onion and lay the circuit */
- }
- time_to_new_circuit = now + options.NewCircuitPeriod;
- }
-
- /* 3. Every second, we check how much bandwidth we've consumed and
- * increment global_read_bucket.
- */
- stats_n_bytes_read += stats_prev_global_read_bucket-global_read_bucket;
- if(global_read_bucket < 9*options.TotalBandwidth) {
- global_read_bucket += options.TotalBandwidth;
- log_fn(LOG_DEBUG,"global_read_bucket now %d.", global_read_bucket);
- }
- stats_prev_global_read_bucket = global_read_bucket;
-
- /* 4. We do houskeeping for each connection... */
- for(i=0;i<nfds;i++) {
- run_connection_housekeeping(i, now);
- }
- /* 5. 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.
- */
- 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);
- 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)) {
- 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 crypto_pk_env_t *init_key_from_file(const char *fname)
- {
- crypto_pk_env_t *prkey = NULL;
- int fd = -1;
- FILE *file = NULL;
- if (!(prkey = crypto_new_pk_env(CRYPTO_PK_RSA))) {
- log(LOG_ERR, "Error creating crypto environment.");
- goto error;
- }
- switch(file_status(fname)) {
- case FN_DIR:
- case FN_ERROR:
- log(LOG_ERR, "Can't read key from %s", fname);
- goto error;
- case FN_NOENT:
- log(LOG_INFO, "No key found in %s; generating fresh key.", fname);
- if (crypto_pk_generate_key(prkey)) {
- log(LOG_ERR, "Error generating key: %s", crypto_perror());
- goto error;
- }
- if (crypto_pk_check_key(prkey) <= 0) {
- log(LOG_ERR, "Generated key seems invalid");
- goto error;
- }
- log(LOG_INFO, "Generated key seems valid");
- if (crypto_pk_write_private_key_to_filename(prkey, fname)) {
- log(LOG_ERR, "Couldn't write generated key to %s.", fname);
- goto error;
- }
- return prkey;
- case FN_FILE:
- if (crypto_pk_read_private_key_from_filename(prkey, fname)) {
- log(LOG_ERR, "Error loading private key.");
- goto error;
- }
- return prkey;
- default:
- assert(0);
- }
- error:
- if (prkey)
- crypto_free_pk_env(prkey);
- if (fd >= 0 && !file)
- close(fd);
- if (file)
- fclose(file);
- return NULL;
- }
- static int init_keys(void)
- {
- char keydir[512];
- char fingerprint[FINGERPRINT_LEN+MAX_NICKNAME_LEN+3];
- char *cp;
- const char *tmp, *mydesc;
- crypto_pk_env_t *prkey;
- /* OP's don't need keys. Just initialize the TLS context.*/
- if (!options.OnionRouter) {
- assert(!options.DirPort);
- if (tor_tls_context_new(NULL, 0, NULL)<0) {
- log_fn(LOG_ERR, "Error creating TLS context for OP.");
- return -1;
- }
- return 0;
- }
- assert(options.DataDirectory);
- if (strlen(options.DataDirectory) > (512-128)) {
- log_fn(LOG_ERR, "DataDirectory is too long.");
- return -1;
- }
- if (check_private_dir(options.DataDirectory, 1)) {
- return -1;
- }
- sprintf(keydir,"%s/keys",options.DataDirectory);
- if (check_private_dir(keydir, 1)) {
- return -1;
- }
- cp = keydir + strlen(keydir); /* End of string. */
-
- /* 1. Read identity key. Make it if none is found. */
- strcpy(cp, "/identity.key");
- log_fn(LOG_INFO,"Reading/making identity key %s...",keydir);
- prkey = init_key_from_file(keydir);
- if (!prkey) return -1;
- set_identity_key(prkey);
- /* 2. Read onion key. Make it if none is found. */
- strcpy(cp, "/onion.key");
- log_fn(LOG_INFO,"Reading/making onion key %s...",keydir);
- prkey = init_key_from_file(keydir);
- if (!prkey) return -1;
- set_onion_key(prkey);
-
- /* 3. Initialize link key and TLS context. */
- strcpy(cp, "/link.key");
- log_fn(LOG_INFO,"Reading/making link key %s...",keydir);
- prkey = init_key_from_file(keydir);
- if (!prkey) return -1;
- set_link_key(prkey);
- if (tor_tls_context_new(prkey, 1, options.Nickname) < 0) {
- log_fn(LOG_ERR, "Error initializing TLS context");
- return -1;
- }
- /* 4. Dump router descriptor to 'router.desc' */
- /* Must be called after keys are initialized. */
- if (!(router_get_my_descriptor())) {
- log_fn(LOG_ERR, "Error initializing descriptor.");
- return -1;
- }
- /* We need to add our own fingerprint so it gets recognized. */
- if (dirserv_add_own_fingerprint(options.Nickname, get_identity_key())) {
- log_fn(LOG_ERR, "Error adding own fingerprint to approved set");
- return -1;
- }
- tmp = mydesc = router_get_my_descriptor();
- if (dirserv_add_descriptor(&tmp)) {
- log(LOG_ERR, "Unable to add own descriptor to directory.");
- return -1;
- }
- sprintf(keydir,"%s/router.desc", options.DataDirectory);
- log_fn(LOG_INFO,"Dumping descriptor to %s...",keydir);
- if (write_str_to_file(keydir, mydesc)) {
- return -1;
- }
- /* 5. Dump fingerprint to 'fingerprint' */
- sprintf(keydir,"%s/fingerprint", options.DataDirectory);
- log_fn(LOG_INFO,"Dumping fingerprint to %s...",keydir);
- assert(strlen(options.Nickname) <= MAX_NICKNAME_LEN);
- strcpy(fingerprint, options.Nickname);
- strcat(fingerprint, " ");
- if (crypto_pk_get_fingerprint(get_identity_key(),
- fingerprint+strlen(fingerprint))<0) {
- log_fn(LOG_ERR, "Error computing fingerprint");
- return -1;
- }
- strcat(fingerprint, "\n");
- if (write_str_to_file(keydir, fingerprint))
- return -1;
- if(!options.DirPort)
- return 0;
- /* 6. [dirserver only] load approved-routers file */
- sprintf(keydir,"%s/approved-routers", options.DataDirectory);
- log_fn(LOG_INFO,"Loading approved fingerprints from %s...",keydir);
- if(dirserv_parse_fingerprint_file(keydir) < 0) {
- log_fn(LOG_ERR, "Error loading fingerprints");
- return -1;
- }
- /* 7. [dirserver only] load old directory, if it's there */
- sprintf(keydir,"%s/cached-directory", options.DataDirectory);
- log_fn(LOG_INFO,"Loading cached directory from %s...",keydir);
- cp = read_file_to_str(keydir);
- if(!cp) {
- log_fn(LOG_INFO,"Cached directory %s not present. Ok.",keydir);
- } else {
- if(dirserv_init_from_directory_string(cp) < 0) {
- log_fn(LOG_ERR, "Cached directory %s is corrupt", keydir);
- free(cp);
- return -1;
- }
- free(cp);
- }
- /* success */
- return 0;
- }
- static int do_main_loop(void) {
- int i;
- int timeout;
- int poll_result;
-
- /* load the routers file */
- if(router_get_list_from_file(options.RouterFile) < 0) {
- log_fn(LOG_ERR,"Error loading router list.");
- return -1;
- }
- /* load the private keys, if we're supposed to have them, and set up the
- * TLS context. */
- if (init_keys() < 0) {
- log_fn(LOG_ERR,"Error initializing keys; exiting");
- return -1;
- }
- if(options.OnionRouter) {
- cpu_init(); /* launch cpuworkers. Need to do this *after* we've read the onion key. */
- router_upload_desc_to_dirservers(); /* upload our descriptor to all dirservers */
- }
- /* 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.
- */
- retry_all_connections((uint16_t) options.ORPort,
- (uint16_t) options.APPort,
- (uint16_t) options.DirPort);
- for(;;) {
- #ifndef MS_WIN32 /* 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) {
- /* fetch a new directory */
- if(options.DirPort) {
- /* reload the fingerprint file */
- char keydir[512];
- 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.");
- }
- if(router_get_list_from_file(options.RouterFile) < 0) {
- log(LOG_WARN,"Error reloading router list. Continuing with old list.");
- }
- } else {
- directory_initiate_command(router_pick_directory_server(), DIR_CONN_STATE_CONNECTING_FETCH);
- }
- /* close and reopen the log files */
- reset_logs();
- 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 = 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.");
- 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 blows away 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_WIN32 /* 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 */
- unlink(options.PidFile);
- exit(0);
- 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"
- " %10lud 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 outgoing cell fullness: %2.3f%%",
- 100*(((double)stats_n_data_bytes_packaged) /
- (stats_n_data_cells_packaged*(CELL_PAYLOAD_SIZE-RELAY_HEADER_SIZE))) );
- if (stats_n_data_cells_received)
- log(severity,"Average incoming cell fullness: %2.3f%%",
- 100*(((double)stats_n_data_bytes_received) /
- (stats_n_data_cells_received*(CELL_PAYLOAD_SIZE-RELAY_HEADER_SIZE))) );
-
- if (stats_n_seconds_reading)
- log(severity,"Average bandwidth used: %d bytes/sec",
- (int) (stats_n_bytes_read/stats_n_seconds_reading));
- }
- void daemonize(void) {
- #ifndef MS_WINDOWS
- /* Fork; parent exits. */
- if (fork())
- exit(0);
- /* Create new session; make sure we never get a terminal */
- setsid();
- if (fork())
- exit(0);
- chdir("/");
- umask(000);
- fclose(stdin);
- fclose(stdout);
- fclose(stderr);
- #endif
- }
- void write_pidfile(char *filename) {
- FILE *pidfile;
- if ((pidfile = fopen(filename, "w")) == NULL) {
- log_fn(LOG_WARN, "unable to open %s for writing: %s", filename,
- strerror(errno));
- } else {
- fprintf(pidfile, "%d", getpid());
- fclose(pidfile);
- }
- }
- int tor_main(int argc, char *argv[]) {
- /* give it somewhere to log to initially */
- add_stream_log(LOG_INFO, "<stdout>", stdout);
- if(getconfig(argc,argv,&options)) {
- log_fn(LOG_ERR,"Reading config file failed. exiting.");
- return -1;
- }
- log_set_severity(options.loglevel); /* assign logging severity level from options */
- close_logs(); /* close stdout, then open with correct loglevel if necessary */
- if(!options.LogFile && !options.RunAsDaemon)
- add_stream_log(options.loglevel, "<stdout>", stdout);
- if(options.DebugLogFile)
- add_file_log(LOG_DEBUG, options.DebugLogFile);
- if(options.LogFile)
- add_file_log(options.loglevel, options.LogFile);
- global_read_bucket = options.TotalBandwidth; /* start it at 1 second of traffic */
- stats_prev_global_read_bucket = global_read_bucket;
- /* write our pid to the pid file */
- write_pidfile(options.PidFile);
- if(options.RunAsDaemon)
- daemonize();
- if(options.OnionRouter) { /* only spawn dns handlers if we're a router */
- dns_init(); /* initialize the dns resolve tree, and spawn workers */
- }
- #ifndef MS_WINDOWS /* do signal stuff only on unix */
- signal (SIGINT, catch); /* catch kills so we can exit cleanly */
- signal (SIGTERM, catch);
- signal (SIGUSR1, catch); /* to dump stats */
- signal (SIGHUP, catch); /* to reload directory */
- signal (SIGCHLD, catch); /* for exiting dns/cpu workers */
- #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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