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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. */
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);
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];
/* 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(options.ORPort) {
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 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(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_newest(NULL, 1);
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.");
circuit_launch_new(); /* make a new circuit */
} else if (options.RunTesting && circ &&
circ->timestamp_created + TESTING_CIRCUIT_INTERVAL < now) {
log_fn(LOG_INFO,"Creating a new testing circuit.");
circuit_launch_new();
}
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();
}
}
/* 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_WARN, "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_WARN,"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_CONN_STATE_CONNECTING_FETCH);
}
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;
/* 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;
}
/* Initialize the history structures. */
rep_hist_init();
/* 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.ORPort) {
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.
*/
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_WARN,"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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