<?
ob_start("ob_gzhandler");
require_once("include/bittorrent.php");
require_once("include/benc.php");
function err($msg)
{
benc_resp(array("failure reason" => array(type => "string", value => $msg)));
exit();
}
function benc_resp($d)
{
benc_resp_raw(benc(array(type => "dictionary", value => $d)));
}
function benc_resp_raw($x)
{
header("Content-Type: text/plain");
header("Pragma: no-cache");
print($x);
}
$req = "info_hash:peer_id:!ip:port:uploaded:downloaded:left:!event:!passkey";
foreach (explode(":", $req) as $x)
{
if ($x[0] == "!")
{
$x = substr($x, 1);
$opt = 1;
}
else
$opt = 0;
if (!isset($_GET[$x]))
{
if (!$opt)
err("missing key");
continue;
}
$GLOBALS[$x] = unesc($_GET[$x]);
}
if (ENA_PASSKEY && (
strlen($passkey) != 32 &&
@mysql_num_rows(@mysql_query("SELECT id FROM users WHERE passkey=" . sqlesc($passkey))) != 1))
err("Invalid passkey! Re-download the .torrent from $BASEURL ($passkey)");
$passkey=sqlesc($passkey);
foreach (array("info_hash","peer_id") as $x)
{
if (strlen($GLOBALS[$x]) != 20)
err("invalid $x (" . strlen($GLOBALS[$x]) . " - " . urlencode($GLOBALS[$x]) . ")");
}
//if (empty($ip) || !preg_match('/^(\d{1,3}\.){3}\d{1,3}$/s', $ip))
$ip = getip();
$port = 0 + $port;
$downloaded = 0 + $downloaded;
$uploaded = 0 + $uploaded;
$left = 0 + $left;
$rsize = 50;
foreach(array("num want", "numwant", "num_want") as $k)
{
if (isset($_GET[$k]))
{
$rsize = 0 + $_GET[$k];
break;
}
}
$agent = $_SERVER["HTTP_USER_AGENT"];
// Deny access made with a browser...
//if (ereg("^Mozilla\\/", $agent) || ereg("^Opera\\/", $agent) || ereg("^Links ", $agent) || ereg("^Lynx\\/", $agent))
// err("torrent not registered with this tracker");
if (!$port || $port > 0xffff)
err("invalid port");
if (!isset($event))
$event = "";
$seeder = ($left == 0) ? "yes" : "no";
$res = mysql_query("SELECT id, banned, seeders + leechers AS numpeers, UNIX_TIMESTAMP(added) AS ts FROM torrents WHERE " . hash_where("info_hash", $info_hash));
$torrent = mysql_fetch_assoc($res);
if (!$torrent)
err("torrent not registered with this tracker");
$torrentid = $torrent["id"];
$fields = "seeder, peer_id, ip, port, uploaded, downloaded, userid";
$numpeers = $torrent["numpeers"];
$limit = "";
if ($numpeers > $rsize)
$limit = "ORDER BY RAND() LIMIT $rsize";
$res = mysql_query("SELECT $fields FROM peers WHERE torrent = $torrentid AND connectable = 'yes' $limit");
$resp = 'd' . benc_str('interval') . 'i' . $announce_interval . 'e' . benc_str('peers') . (($compact = ($_GET['compact'] == 1))?'':'l');
unset($self);
while ($row = mysql_fetch_assoc($res))
{
$row["peer_id"] = hash_pad($row["peer_id"]);
if ($row["peer_id"] === $peer_id)
{
$userid = $row["userid"];
$self = $row;
continue;
}
if($compact)
{
$peer_ip = explode('.', $row["ip"]);
$plist .= pack("C*", $peer_ip[0], $peer_ip[1], $peer_ip[2], $peer_ip[3]). pack("n*", (int)$row["port"]);
} else {
$resp .= "d" .
benc_str("ip") . benc_str($row["ip"]) .
benc_str("peer id") . benc_str($row["peer_id"]) .
benc_str("port") . "i" . $row["port"] . "e" .
"e";
}
}
$resp .= ($compact ? benc_str($plist):''). "ee";
$selfwhere = "torrent = $torrentid AND ". (ENA_PASSKEY ?"passkey=$passkey AND ":'') . hash_where("peer_id", $peer_id);
if (!isset($self))
{
$res = mysql_query("SELECT $fields FROM peers WHERE $selfwhere");
$row = mysql_fetch_assoc($res);
if ($row)
{
$userid = $row["userid"];
$self = $row;
}
}
//// Up/down stats ////////////////////////////////////////////////////////////
if (!isset($self))
{
if(ENA_PASSKEY && ENA_PASSKEYLIMITCONNECTIONS)
{
$valid = @mysql_num_rows(@mysql_query("SELECT id FROM peers WHERE torrent=$torrentid AND passkey=$passkey"));
if ($valid[0] >= 1 && $seeder == 'no')
err("Connection limit exceeded! You may only leech from one location at a time.");
if ($valid[0] >= 3 && $seeder == 'yes')
err("Connection limit exceeded!");
}
$rz = mysql_query("SELECT id, uploaded, downloaded, class FROM users WHERE ip='$ip' AND enabled = 'yes' ". (ENA_PASSKEY ? "AND passkey=$passkey ":''). "ORDER BY last_access DESC LIMIT 1") or err("Tracker error 2");
if ($MEMBERSONLY && mysql_num_rows($rz) == 0)
err("Unrecognized host ($ip). Please go to $BASEURL to sign-up or login.");
$az = mysql_fetch_assoc($rz);
$userid = $az["id"];
// if ($left > 0 && $az["class"] < UC_VIP)
if ($az["class"] < UC_VIP)
{
$gigs = $az["uploaded"] / (1024*1024*1024);
$elapsed = floor((gmtime() - $torrent["ts"]) / 3600);
$ratio = (($az["downloaded"] > 0) ? ($az["uploaded"] / $az["downloaded"]) : 1);
if ($ratio < 0.5 || $gigs < 5) $wait = 48;
elseif ($ratio < 0.65 || $gigs < 6.5) $wait = 24;
elseif ($ratio < 0.8 || $gigs < 8) $wait = 12;
elseif ($ratio < 0.95 || $gigs < 9.5) $wait = 6;
else $wait = 0;
if (($elapsed < $wait)&&($seeder == 'no'))
err("Not authorized (" . ($wait - $elapsed) . "h) - READ THE FAQ!");
}
}
else
{
$upthis = max(0, $uploaded - $self["uploaded"]);
$downthis = max(0, $downloaded - $self["downloaded"]);
if ($upthis > 0 || $downthis > 0)
mysql_query("UPDATE users SET uploaded = uploaded + $upthis, downloaded = downloaded + $downthis WHERE id=$userid") or err("Tracker error 3");
}
///////////////////////////////////////////////////////////////////////////////
function portblacklisted($port)
{
// direct connect
if ($port >= 411 && $port <= 413) return true;
// bittorrent
if ($port >= 6881 && $port <= 6889) return true;
// kazaa
if ($port == 1214) return true;
// gnutella
if ($port >= 6346 && $port <= 6347) return true;
// emule
if ($port == 4662) return true;
// winmx
if ($port == 6699) return true;
return false;
}
$updateset = array();
if ($event == "stopped")
{
if (isset($self))
{
mysql_query("DELETE FROM peers WHERE $selfwhere");
if (mysql_affected_rows())
{
if ($self["seeder"] == "yes")
$updateset[] = "seeders = seeders - 1";
else
$updateset[] = "leechers = leechers - 1";
}
}
}
else
{
if ($event == "completed")
$updateset[] = "times_completed = times_completed + 1";
if (isset($self))
{
mysql_query("UPDATE peers SET uploaded = $uploaded, downloaded = $downloaded, to_go = $left, last_action = NOW(), seeder = '$seeder'"
. ($seeder == "yes" && $self["seeder"] != $seeder ? ", finishedat = " . time() : "") . " WHERE $selfwhere");
if (mysql_affected_rows() && $self["seeder"] != $seeder)
{
if ($seeder == "yes")
{
$updateset[] = "seeders = seeders + 1";
$updateset[] = "leechers = leechers - 1";
}
else
{
$updateset[] = "seeders = seeders - 1";
$updateset[] = "leechers = leechers + 1";
}
}
}
else
{
if (portblacklisted($port))
err("Port $port is blacklisted.");
else
{
$sockres = @fsockopen($ip, $port, $errno, $errstr, 5);
if (!$sockres)
$connectable = "no";
else
{
$connectable = "yes";
@fclose($sockres);
}
}
$ret = mysql_query("INSERT INTO peers (connectable, torrent, peer_id, ip, port, uploaded, downloaded, to_go, started, last_action, seeder, userid, agent, uploadoffset, downloadoffset, passkey) VALUES ('$connectable', $torrentid, " . sqlesc($peer_id) . ", " . sqlesc($ip) . ", $port, $uploaded, $downloaded, $left, NOW(), NOW(), '$seeder', $userid, " . sqlesc($agent) . ", $uploaded, $downloaded, $passkey)");
if ($ret)
{
if ($seeder == "yes")
$updateset[] = "seeders = seeders + 1";
else
$updateset[] = "leechers = leechers + 1";
}
}
}
if ($seeder == "yes")
{
if ($torrent["banned"] != "yes")
$updateset[] = "visible = 'yes'";
$updateset[] = "last_action = NOW()";
}
if (count($updateset))
mysql_query("UPDATE torrents SET " . join(",", $updateset) . " WHERE id = $torrentid");
benc_resp_raw($resp);
?>
