145 lines
4.4 KiB
PHP
145 lines
4.4 KiB
PHP
<?php
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require_once __DIR__ . '/../seria.php';
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function announce_fail(string $reason): never {
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die(bencode(['failure reason' => $reason]));
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}
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if(empty($_GET))
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die('There is nothing here.');
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header('Content-Type: text/plain; charset=us-ascii');
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header('X-Tracker-Version: Seria/' . SERIA_VERSION);
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if(!$sIsIPv4)
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announce_fail('Tracker is only supported over IPv4, please reset your DNS cache.');
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//file_put_contents(SERIA_ERRORS, $_SERVER['REQUEST_URI'] . PHP_EOL, FILE_APPEND);
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$urlParts = explode('/', trim($_SERVER['PATH_INFO'], '/'));
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$cInfoHash = (string)filter_input(INPUT_GET, 'info_hash');
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if(strlen($cInfoHash) !== 20)
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announce_fail('Invalid info hash.');
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$cPeerId = (string)filter_input(INPUT_GET, 'peer_id');
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if(strlen($cPeerId) !== 20)
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announce_fail('Invalid peer id format.');
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$cPeerAddress = $_SERVER['REMOTE_ADDR'];
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$cPeerPort = (int)filter_input(INPUT_GET, 'port', FILTER_SANITIZE_NUMBER_INT);
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if($cPeerPort < 1 || $cPeerPort > 0xFFFF)
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announce_fail('Invalid port number.');
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$cPeerKey = (string)filter_input(INPUT_GET, 'key');
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if(strlen($cPeerKey) > 128)
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announce_fail('Key is ridiculous.');
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$cPeerEvent = (string)filter_input(INPUT_GET, 'event');
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if(strlen($cPeerEvent) > 128)
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announce_fail('Event is fucked up.');
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$cPeerAgent = (string)filter_input(INPUT_SERVER, 'HTTP_USER_AGENT');
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if(strlen($cPeerAgent) > 255)
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announce_fail('Agent is stupid.');
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$cCompactPeers = !empty($_GET['compact']);
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$cNoPeerId = !empty($_GET['no_peer_id']);
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$cShortAnnounce = !empty($_GET['short']);
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$cBytesUploaded = (int)filter_input(INPUT_GET, 'uploaded', FILTER_SANITIZE_NUMBER_INT);
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$cBytesDownloaded = (int)filter_input(INPUT_GET, 'downloaded', FILTER_SANITIZE_NUMBER_INT);
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$cBytesRemaining = (int)filter_input(INPUT_GET, 'left', FILTER_SANITIZE_NUMBER_INT);
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$cPeerWant = (int)filter_input(INPUT_GET, 'numwant', FILTER_SANITIZE_NUMBER_INT);
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$cPassKey = $urlParts[0] ?? '';
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if(!empty($cPassKey)) {
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try {
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$cUserInfo = SeriaUser::byPassKey($pdo, $cPassKey);
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} catch(SeriaUserNotFoundException $ex) {
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sleep(3);
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announce_fail('Authentication failed.');
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}
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} else $cUserInfo = SeriaUser::anonymous();
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$interval = SERIA_ANNOUNCE_INTERVAL;
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$minInterval = SERIA_ANNOUNCE_INTERVAL_MIN;
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if($cShortAnnounce && SERIA_ANNOUNCE_SHORT) {
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$interval = SERIA_ANNOUNCE_SHORT_INTERVAL;
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$minInterval = SERIA_ANNOUNCE_SHORT_INTERVAL_MIN;
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}
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try {
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$cTorrentInfo = SeriaTorrent::byHash($pdo, $cInfoHash);
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} catch(SeriaTorrentNotFoundException $ex) {
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announce_fail('Info hash not found.');
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}
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$cCanDownload = $cTorrentInfo->canDownload($cUserInfo);
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if($cCanDownload !== '')
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switch($cCanDownload) {
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case 'inactive':
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announce_fail('This download is inactive.');
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case 'private':
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announce_fail('You must be logged in for this download.');
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case 'pending':
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announce_fail('This download is pending approval.');
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default:
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announce_fail($cCanDownload);
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}
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$cPeerInfo = SeriaTorrentPeer::byPeerId($pdo, $cTorrentInfo, $cPeerId);
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if(empty($cPeerInfo)) {
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// could probably skip this is the event is 'stopped'
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$cPeerInfo = SeriaTorrentPeer::create(
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$pdo, $cTorrentInfo, $cUserInfo, $cPeerId, $cPeerAddress, $cPeerPort, $interval,
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$cPeerAgent, $cPeerKey, $cBytesUploaded, $cBytesDownloaded, $cBytesRemaining
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);
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} else {
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if(!$cPeerInfo->verifyKey($cPeerKey)) {
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sleep(3);
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announce_fail('Peer verification failed.');
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}
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if(!$cPeerInfo->verifyUser($cUserInfo)) {
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sleep(3);
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announce_fail('User verification failed.');
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}
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$cUserInfo->incrementTransferCounts(
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$cBytesDownloaded - $cPeerInfo->getBytesDownloaded(),
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$cBytesUploaded - $cPeerInfo->getBytesUploaded()
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);
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$cPeerInfo->update(
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$cUserInfo, $cPeerAddress, $cPeerPort, $interval, $cPeerAgent,
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$cBytesUploaded, $cBytesDownloaded, $cBytesRemaining
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);
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}
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if($cPeerEvent === 'stopped') {
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$cPeerInfo->delete();
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die(bencode(new SeriaAnnounceResponse));
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}
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SeriaTorrentPeer::deleteExpired($pdo);
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$response = new SeriaAnnounceResponse(
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$interval + mt_rand(0, 10),
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$minInterval,
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$cTorrentInfo,
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$cNoPeerId && SERIA_ANNOUNCE_NO_PEER_ID,
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$cCompactPeers
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);
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if(!$cPeerInfo->isSeed() || !SERIA_ANNOUNCE_NO_SEED_P2P) {
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$peers = $cTorrentInfo->getSeeds($cPeerInfo);
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foreach($peers as $peer)
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$response->addPeer($peer);
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}
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echo bencode($response);
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