199 lines
7.5 KiB
PHP
199 lines
7.5 KiB
PHP
<?php
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error_reporting(0);
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$start_time = time();
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$connkey = sprintf('%06d', $_REQUEST['connkey']);
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define('MSG_TIMEOUT', ZM_WEB_AJAX_TIMEOUT/2);
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define('MSG_DATA_SIZE', 4+256);
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if ( !($_REQUEST['connkey'] && $_REQUEST['command']) ) {
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ajaxError('No connkey or no command in stream ajax');
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}
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mkdir(ZM_PATH_SOCKS);
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# The file that we point ftok to has to exist, and only exist if zms is running, so we are pointing it at the .sock
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$key = ftok(ZM_PATH_SOCKS.'/zms-'.$connkey.'s.sock', 'Z');
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$semaphore = sem_get($key, 1);
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$semaphore_tries = 10;
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$have_semaphore = false;
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while ($semaphore_tries) {
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if ( version_compare( phpversion(), '5.6.1', '<') ) {
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# don't have support for non-blocking
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$have_semaphore = sem_acquire($semaphore);
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} else {
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$have_semaphore = sem_acquire($semaphore, 1);
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}
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if ($have_semaphore !== false) break;
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ZM\Debug('Failed to get semaphore for '.$connkey.' '.$key.', trying again');
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usleep(100000);
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$semaphore_tries -= 1;
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}
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if ($have_semaphore !== false) {
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if (!($socket = @socket_create(AF_UNIX, SOCK_DGRAM, 0))) {
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sem_release($semaphore);
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ajaxError('socket_create() failed: '.socket_strerror(socket_last_error()));
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}
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$localSocketFile = ZM_PATH_SOCKS.'/zms-'.$connkey.'w.sock';
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if (!socket_bind($socket, $localSocketFile)) {
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sem_release($semaphore);
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ajaxError("socket_bind( $localSocketFile ) failed: ".socket_strerror(socket_last_error()));
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}
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switch ($_REQUEST['command']) {
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case CMD_VARPLAY :
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ZM\Debug('Varplaying to '.$_REQUEST['rate']);
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$msg = pack('lcn', MSG_CMD, $_REQUEST['command'], $_REQUEST['rate']+32768);
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break;
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case CMD_ZOOMIN :
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ZM\Debug('Zooming to '.$_REQUEST['x'].','.$_REQUEST['y']);
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$msg = pack('lcnn', MSG_CMD, $_REQUEST['command'], $_REQUEST['x'], $_REQUEST['y']);
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break;
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case CMD_PAN :
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ZM\Debug('Panning to '.$_REQUEST['x'].','.$_REQUEST['y']);
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$msg = pack('lcnn', MSG_CMD, $_REQUEST['command'], $_REQUEST['x'], $_REQUEST['y']);
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break;
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case CMD_SCALE :
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ZM\Debug('Scaling to '.$_REQUEST['scale']);
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$msg = pack('lcn', MSG_CMD, $_REQUEST['command'], $_REQUEST['scale']);
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break;
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case CMD_SEEK :
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# Pack int two 32 bit integers instead of trying to deal with floats
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$msg = pack('lcNN', MSG_CMD, $_REQUEST['command'],
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intval($_REQUEST['offset']),
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1000000*( $_REQUEST['offset']-intval($_REQUEST['offset'])));
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break;
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default :
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ZM\Debug('Sending command ' . $_REQUEST['command']);
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$msg = pack('lc', MSG_CMD, $_REQUEST['command']);
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break;
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}
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$remSockFile = ZM_PATH_SOCKS.'/zms-'.$connkey.'s.sock';
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// Pi can take up to 3 seconds for zms to start up.
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$max_socket_tries = 1000;
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// FIXME This should not exceed web_ajax_timeout
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while ( !file_exists($remSockFile) && $max_socket_tries-- ) {
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//sometimes we are too fast for our own good, if it hasn't been setup yet give it a second.
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// WHY? We will just send another one...
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// ANSWER: Because otherwise we get a log of errors logged
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//ZM\Debug("$remSockFile does not exist, waiting, current " . (time() - $start_time) . ' seconds' );
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usleep(1000);
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}
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if (!file_exists($remSockFile)) {
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sem_release($semaphore);
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ajaxError("Socket $remSockFile does not exist. This file is created by zms, and since it does not exist, either zms did not run, or zms exited early. Please check your zms logs and ensure that CGI is enabled in apache and check that the PATH_ZMS is set correctly. Make sure that ZM is actually recording. If you are trying to view a live stream and the capture process (zmc) is not running then zms will exit. Please go to http://zoneminder.readthedocs.io/en/latest/faq.html#why-can-t-i-see-streamed-images-when-i-can-see-stills-in-the-zone-window-etc for more information.");
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} else {
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if (!@socket_sendto($socket, $msg, strlen($msg), 0, $remSockFile)) {
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sem_release($semaphore);
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ajaxError("socket_sendto( $remSockFile ) failed: ".socket_strerror(socket_last_error()));
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}
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}
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$rSockets = array($socket);
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$wSockets = NULL;
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$eSockets = NULL;
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$timeout = MSG_TIMEOUT - ( time() - $start_time );
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$numSockets = socket_select($rSockets, $wSockets, $eSockets, intval($timeout/1000), ($timeout%1000)*1000);
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if ( $numSockets === false ) {
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sem_release($semaphore);
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ajaxError('socket_select failed: '.socket_strerror(socket_last_error()));
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} else if ( $numSockets < 0 ) {
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sem_release($semaphore);
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ajaxError("Socket closed $remSockFile");
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} else if ( $numSockets == 0 ) {
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ZM\Error("Timed out waiting for msg $remSockFile");
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socket_set_nonblock($socket);
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#ajaxError("Timed out waiting for msg $remSockFile");
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} else if ( $numSockets > 0 ) {
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if ( count($rSockets) != 1 ) {
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sem_release($semaphore);
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ajaxError('Bogus return from select, '.count($rSockets).' sockets available');
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}
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}
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switch ($nbytes = @socket_recvfrom($socket, $msg, MSG_DATA_SIZE, 0, $remSockFile)) {
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case -1 :
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sem_release($semaphore);
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ajaxError("socket_recvfrom( $remSockFile ) failed: ".socket_strerror(socket_last_error()));
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break;
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case 0 :
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sem_release($semaphore);
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ajaxError('No data to read from socket');
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break;
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default :
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if ( $nbytes != MSG_DATA_SIZE ) {
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sem_release($semaphore);
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ajaxError("Got unexpected message size, got $nbytes, expected ".MSG_DATA_SIZE);
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}
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break;
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}
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$data = unpack('ltype', $msg);
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switch ( $data['type'] ) {
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case MSG_DATA_WATCH :
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$data = unpack('ltype/imonitor/istate/dfps/dcapturefps/danalysisfps/ilevel/irate/ddelay/izoom/Cdelayed/Cpaused/Cenabled/Cforced', $msg);
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$data['fps'] = round( $data['fps'], 2 );
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$data['capturefps'] = round( $data['capturefps'], 2 );
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$data['analysisfps'] = round( $data['analysisfps'], 2 );
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$data['rate'] /= RATE_BASE;
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$data['delay'] = round( $data['delay'], 2 );
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$data['zoom'] = round( $data['zoom']/SCALE_BASE, 1 );
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if (ZM_OPT_USE_AUTH && (ZM_AUTH_RELAY == 'hashed')) {
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$auth_hash = generateAuthHash(ZM_AUTH_HASH_IPS);
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if (isset($_REQUEST['auth']) and ($_REQUEST['auth'] != $auth_hash)) {
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$data['auth'] = $auth_hash;
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ZM\Debug('including new auth hash '.$data['auth'].'because doesnt match request auth hash '.$_REQUEST['auth']);
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}
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}
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sem_release($semaphore);
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ajaxResponse(array('status'=>$data));
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break;
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case MSG_DATA_EVENT :
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if ( version_compare( phpversion(), '5.6.0', '<') ) {
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ZM\Debug('Using old unpack methods to handle 64bit event id');
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$data = unpack('ltype/ieventlow/ieventhigh/dduration/dprogress/irate/izoom/Cpaused', $msg);
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$data['event'] = $data['eventhigh'] << 32 | $data['eventlow'];
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} else {
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$data = unpack('ltype/Qevent/dduration/dprogress/irate/izoom/Cpaused', $msg);
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}
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$data['rate'] /= RATE_BASE;
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$data['zoom'] = round($data['zoom']/SCALE_BASE, 1);
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if ( ZM_OPT_USE_AUTH && (ZM_AUTH_RELAY == 'hashed') ) {
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$auth_hash = generateAuthHash(ZM_AUTH_HASH_IPS);
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if ( isset($_REQUEST['auth']) and ($_REQUEST['auth'] != $auth_hash) ) {
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$data['auth'] = $auth_hash;
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}
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}
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sem_release($semaphore);
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ajaxResponse(array('status'=>$data));
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break;
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default :
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sem_release($semaphore);
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ajaxError('Unexpected received message type '.$data['type']);
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}
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sem_release($semaphore);
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} else {
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ajaxError("Unable to get semaphore for $connkey $key.");
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}
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ajaxError('Unrecognised action or insufficient permissions in ajax/stream');
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function ajaxCleanup() {
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global $socket, $localSocketFile;
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if ( !empty($socket) )
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@socket_close($socket);
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if ( !empty($localSocketFile) )
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@unlink($localSocketFile);
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}
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?>
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