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announce.php
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announce.php
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<?php
require_once('include/bittorrent_announce.php');
dbconn_announce();
global $BASEURL, $seebanned_class, $REPORTMAIL, $waitsystem, $uploaderdouble_torrent, $cheaterdet_security, $nodetect_security;
// 1. BLOCK ACCESS WITH WEB BROWSERS AND CHEATS!
$agent = $_SERVER ["HTTP_USER_AGENT"];
block_browser();
// 2. GET ANNOUNCE VARIABLES
// get string type passkey, info_hash, peer_id, event, ip from client
foreach (array("passkey", "info_hash", "peer_id", "event", "key") as $x) {
if (isset ($_GET ["$x"]))
$GLOBALS [$x] = $_GET [$x];
}
if (!isset ($event))
$event = "";
// get integer type port, downloaded, uploaded, left from client
foreach (array("port", "downloaded", "uploaded", "left", "compact", "no_peer_id") as $x) {
$GLOBALS [$x] = 0 + $_GET [$x];
}
// check info_hash, peer_id and passkey
foreach (array("passkey", "info_hash", "peer_id", "port", "downloaded", "uploaded", "left") as $x) {
if (!isset ($x))
err("丢失关键信息: $x");
}
foreach (array("info_hash", "peer_id") as $x) {
if (strlen($GLOBALS [$x]) != 20)
err(" $x 的长度为 " . strlen($GLOBALS [$x]) . "( " . rawurlencode($GLOBALS [$x]) . " )");
}
// check passkey
if (strlen($passkey) != 32)
err("001-错误的passkey( $passkey )! 请从" . $BASEURL . "重新下载torrent文件");
if (!$az = $Cache->get_value('user_passkey_' . $passkey . '_content')) {
$res = sql_query("SELECT id, username, downloadpos, enabled, uploaded, downloaded, class, parked, clientselect, showclienterror, enablepublic4, showtjuipnotice FROM users WHERE passkey='" . mysql_real_escape_string($passkey) . "' LIMIT 1");
$az = mysql_fetch_array($res);
$Cache->cache_value('user_passkey_' . $passkey . '_content', $az, 950);
}
if (!$az)
err("001-错误的passkey( $passkey )! 请从" . $BASEURL . "重新下载torrent文件");
// 4. GET IP AND CHECK PORT
$ip = getip(); // avoid to get the spoof ip from some agent
$query_ip['ipv6'] = $_GET ['ipv6'] ?? "";
$query_ip['ipv4'] = $_GET ['ipv4'] ?? "";
$query_ip['ip'] = $_GET ['ip'] ?? "";
// handle IPv6 address
// client may send local ipv6 address to server, so we use `remote addr` first, then query param
if (validateIPv6($ip)) {
$ipv6 = $ip;
} else if (validateIPv6($query_ip['ipv6'])) {
$ipv6 = $query_ip['ipv6'];
} else if (validateIPv6($query_ip['ip'])) {
$ipv6 = $query_ip['ip'];
}
// IPv4 same with IPv6
if (validateIPv4($query_ip['ipv4'])) {
$ipv4 = $query_ip['ipv4'];
} else if (validateIPv4($query_ip['ip'])) {
$ipv4 = $query_ip['ip'];
} else if (validateIPv4($ip)) {
$ipv4 = $ip;
}
if (isset($ipv4)) {
$nip = ip2long($ipv4);
// check banned IPv4 address
$res = sql_query("SELECT * FROM bans WHERE $nip >= first AND $nip <= last") or sqlerr(__FILE__, __LINE__);
if (mysql_num_rows($res) > 0) err("403-该IP被封禁，请与{$REPORTMAIL}联系！");
// warn the user who enables `public4` in campus
if (check_tjuip($nip) && $az['enablepublic4'] == 'yes' && $az['showtjuipnotice'] == 'no')
sql_query("UPDATE users SET showtjuipnotice = 'yes' WHERE id = " . sqlesc($az['id']));
// drop teredo IPv6 address for campus users
if (check_tjuip($nip) && substr($ipv6, 0, 7) == '2001:0:') unset ($ipv6);
}
// check banned IPv6 address
if (isset ($ipv6)) {
$longipv6 = IPv6ToLong($ipv6);
$res = sql_query("SELECT * FROM banipv6 WHERE ip0 = $longipv6[0] AND ip1=$longipv6[1] AND ip2=$longipv6[2] AND (type='school' OR
( ip3=$longipv6[3] AND type='building' OR
( ip4=$longipv6[4] AND ip5=$longipv6[5] AND ip6=$longipv6[6] AND ip7=$longipv6[7] )))") or sqlerr(__FILE__, __LINE__);
if (mysql_num_rows($res) > 0) err("403-该IP被封禁，请与{$REPORTMAIL}联系！");
}
// check port
if (!$port || $port > 0xffff)
err("002-端口号错误");
if (portblacklisted($port))
err("005-端口 " . $port . " 在黑名单里，请更换端口");
// 5. GET PEER LIST
// Number of peers that the client would like to receive from the tracker.This
// value is permitted to be zero. If omitted, typically defaults to 50 peers.
$rsize = 50;
foreach (array("numwant", "num want", "num_want") as $k) {
if (isset ($_GET [$k])) {
$rsize = 0 + $_GET [$k];
break;
}
}
// set if seeder based on left field
$seeder = ($left == 0) ? "yes" : "no";
$userid = 0 + $az ['id'];
// 3. CHECK IF CLIENT IS ALLOWED
$clicheck_res = check_client($peer_id, $agent);
// After modified, I use this clicheck_res to transmit client_familyid.
// So there is a check whether the check response is numeric or just a error message.
if (is_numeric($clicheck_res)) {
$client_familyid = $clicheck_res;
$clicheck_res = 0;
}
if (!$clicheck_res)
$clicheck_res = check_aria2(getallheaders(), $peer_id, $key);
if ($clicheck_res) {
if ($az ['showclienterror'] == 'no') {
sql_query("UPDATE users SET showclienterror = 'yes' WHERE id = " . sqlesc($userid));
$Cache->delete_value('user_passkey_' . $passkey . '_content');
}
err($clicheck_res);
} elseif ($az ['showclienterror'] == 'yes') {
$USERUPDATESET [] = "showclienterror = 'no'";
$Cache->delete_value('user_passkey_' . $passkey . '_content');
}
// check torrent based on info_hash
if (!$torrent = $Cache->get_value('torrent_hash_' . $info_hash . '_content')) {
$res = sql_query("SELECT id, owner, category, sp_state, seeders, leechers, UNIX_TIMESTAMP(last_seed) AS lastseed, UNIX_TIMESTAMP(last_reseed) AS lastreseed, UNIX_TIMESTAMP(added) AS ts, banned FROM torrents WHERE pulling_out ='0' AND " . hash_where("info_hash", $info_hash));
$torrent = mysql_fetch_array($res);
$Cache->cache_value('torrent_hash_' . $info_hash . '_content', $torrent, 350);
}
if (!$torrent)
err("006-种子尚未上传或者已经被删除");
elseif ($torrent ['banned'] == 'yes' && $az ['class'] < $seebanned_class) {
if ($torrent ['owner'] != $az ['id'])
err("007-该资源被管理员禁止下载，请与相关分类管理员联系");
}
// select peers info from peers table for this torrent
$torrentid = $torrent ["id"];
$numpeers = $torrent ["seeders"] + $torrent ["leechers"];
if ($seeder == 'yes') { // Don't report seeds to other seeders
$only_leech_query = " AND seeder = 'no' ";
$newnumpeers = $torrent ["leechers"];
} else {
$only_leech_query = "";
$newnumpeers = $numpeers;
}
if ($newnumpeers > $rsize)
$limit = " ORDER BY RAND() LIMIT $rsize";
else
$limit = "";
$announce_wait = 10;
// $fields = "seeder, peer_id, ipv4, ipv6, port, uploaded, downloaded, (" . TIMENOW . " - UNIX_TIMESTAMP(last_action)) AS announcetime, UNIX_TIMESTAMP(prev_action) AS prevts, connectable";
$fields = "seeder, peer_id, ipv4, ipv6, port, uploaded, downloaded, (" . TIMENOW . " - UNIX_TIMESTAMP(last_action)) AS announcetime, UNIX_TIMESTAMP(prev_action) AS prevts";
$peerlistsql = "SELECT " . $fields . " FROM peers WHERE torrent = " . $torrentid . " " . $only_leech_query . $limit;
$res = sql_query($peerlistsql);
$real_annnounce_interval = $announce_interval;
if ($anninterthreeage && ($anninterthree > $announce_wait) && (TIMENOW - $torrent ['ts']) >= ($anninterthreeage * 86400))
$real_annnounce_interval = $anninterthree;
elseif ($annintertwoage && ($annintertwo > $announce_wait) && (TIMENOW - $torrent ['ts']) >= ($annintertwoage * 86400))
$real_annnounce_interval = $annintertwo;
$real_annnounce_interval *= rand(1000, 1400) / 1000; // random interval avoid BOOM
$real_annnounce_interval = ceil($real_annnounce_interval);
$rep_dict = [
"interval" => (int)$real_annnounce_interval,
"min interval" => (int)$announce_wait,
"complete" => (int)$torrent["seeders"],
"incomplete" => (int)$torrent["leechers"],
"peers" => [] // By default it is a array object, only when `&compact=1` then it should be a string
];
if ($compact == 1) {
$rep_dict["peers"] = ""; // Change `peers` from array to string
if (validateIPv6($ip))
$rep_dict["peers6"] = ""; // If peer use IPv6 address , we should add packed string in `peers6`
}
unset ($self);
// bencoding the peers info get for this announce
while ($row = mysql_fetch_assoc($res)) {
$row ["peer_id"] = hash_pad($row ["peer_id"]);
if ($row ["peer_id"] === $peer_id) {
$self = $row;
continue;
}
if (isset($event) && $event == "stopped") {
continue;
}
if ($compact == 1) {
if (validateIPv6($row["ipv6"])) {
$rep_dict['peers6'] .= inet_pton($row["ipv6"]) . pack("n", $row["port"]);
}
if (validateIPv4($row["ipv4"])) {
if (!check_tjuip(ip2long($row['ipv4'])) && $az['enablepublic4'] == 'no') {
continue;
}
$rep_dict['peers'] .= inet_pton($row["ipv4"]) . pack("n", $row["port"]);
}
} else {
if (validateIPv6($row["ipv6"])) {
$rep_dict['peers'][] = [
'ip' => $row["ipv6"],
'port' => $row["port"]
];
}
if (validateIPv4($row["ipv4"])) {
if (!check_tjuip(ip2long($row['ipv4'])) && $az['enablepublic4'] == 'no') {
continue;
}
$rep_dict['peers'][] = [
'ip' => $row["ipv4"],
'port' => $row["port"]
];
}
}
}
$selfwhere = "torrent = $torrentid AND " . hash_where("peer_id", $peer_id);
// no found in the above random selection
if (!isset ($self)) {
$res = sql_query("SELECT $fields FROM peers WHERE $selfwhere LIMIT 1");
$row = mysql_fetch_assoc($res);
if ($row) {
$self = $row;
}
}
if (validateIPv6($ip))
$ipv4 = $self ['ipv4'];
// min announce time
if (isset ($self) && $self ['prevts'] > (TIMENOW - $announce_wait) && $event != "stopped" && $event != "completed")
err('008-您的刷新过于频繁，请等候 ' . $announce_wait . ' 秒再尝试');
// current peer_id, or you could say session with tracker not found in table `peers`
if (!isset ($self)) {
$valid = @mysql_fetch_row(@sql_query("SELECT COUNT(*) FROM peers WHERE torrent=$torrentid AND userid=" . sqlesc($userid)));
if ($valid [0] >= 1 && $seeder == 'no')
err("009-你正在从其他地方下载相同的内容，如果这是由下载软件非正常退出造成的，请到个人信息页清除冗余种子");
if ($valid [0] >= 3 && $seeder == 'yes')
err("010-同一种子不能在超过三个地方保种");
if ($az ["enabled"] == "no")
err("011-您的帐户已经被禁用");
elseif ($az ["parked"] == "yes")
err("012-您的帐户已经被封存，请到控制面板中重新启用帐户。（详情请阅读“常见问题”）");
elseif ($az ["downloadpos"] == "no")
err("013-您的下载权限被取消(请与管理组联系)！");
if ($az ["class"] < UC_ADMINISTRATOR) {
$ratio = (($az ["downloaded"] > 0) ? ($az ["uploaded"] / $az ["downloaded"]) : 1);
$gigs = $az ["downloaded"] / (1024 * 1024 * 1024);
if ($waitsystem == "yes") {
if ($gigs > 10) {
$elapsed = strtotime(date("Y-m-d H:i:s")) - $torrent ["ts"];
if ($ratio < 0.4)
$wait = 24;
elseif ($ratio < 0.5)
$wait = 12;
elseif ($ratio < 0.6)
$wait = 6;
elseif ($ratio < 0.8)
$wait = 3;
else
$wait = 0;
if ($elapsed < $wait)
err("014-你的分享率太低，需要等待 " . mkprettytime($wait * 3600 - $elapsed) . "小时才能开始下载, 如需了解详情，请参阅 $BASEURL/faq.php#id46");
}
}
}
} else { // continue an existing session
$upthis = $trueupthis = max(0, $uploaded - $self ["uploaded"]);
$downthis = $truedownthis = max(0, $downloaded - $self ["downloaded"]);
if ($self ['announcetime'] > 0 && $self ['announcetime'] < 43200)
$announcetime = ($self ["seeder"] == "yes" ? "seedtime = seedtime + $self[announcetime]" : "leechtime = leechtime + $self[announcetime]");
else
$announcetime = "seedtime = seedtime";
$is_cheater = false;
if ($cheaterdet_security) {
if ($az ['class'] < $nodetect_security && $self ['announcetime'] > 10) {
$is_cheater = check_cheater($userid, $az ['username'], $torrent ['id'], $upthis, $downthis, $self ['announcetime'], $self ['ipv4'] . "/" . $self ['ipv6'], $port, $torrent ['seeders'], $torrent ['leechers']);
}
}
if (!$is_cheater && ($trueupthis > 0 || $truedownthis > 0)) {
if ($az ['class'] == UC_VIP)
$truedownthis = 0;
$global_promotion_state = get_global_sp_state();
if ($global_promotion_state == 1) { // Normal, see individual torrent
if ($torrent ['sp_state'] == 3 || $torrent ['sp_state'] == 9) { // 2X
$USERUPDATESET [] = "uploaded = uploaded + 2*$trueupthis";
$USERUPDATESET [] = "downloaded = downloaded + $truedownthis";
} elseif ($torrent ['sp_state'] == 4 || $torrent ['sp_state'] == 10) { // 2X
// Free
$USERUPDATESET [] = "uploaded = uploaded + 2*$trueupthis";
} elseif ($torrent ['sp_state'] == 6 || $torrent ['sp_state'] == 12) { // 2X
// 50%
$USERUPDATESET [] = "uploaded = uploaded + 2*$trueupthis";
$USERUPDATESET [] = "downloaded = downloaded + $truedownthis/2";
} else {
if ($torrent ['owner'] == $userid && $uploaderdouble_torrent > 1)
$upthis = $trueupthis * $uploaderdouble_torrent;
if ($torrent ['sp_state'] == 2 || $torrent ['sp_state'] == 8) { // Free
// and
// Forever
// free
$USERUPDATESET [] = "uploaded = uploaded + $upthis";
} elseif ($torrent ['sp_state'] == 5 || $torrent ['sp_state'] == 11) { // 50%
$USERUPDATESET [] = "uploaded = uploaded + $upthis";
$USERUPDATESET [] = "downloaded = downloaded + $truedownthis/2";
} elseif ($torrent ['sp_state'] == 7 || $torrent ['sp_state'] == 13) { // 30%
$USERUPDATESET [] = "uploaded = uploaded + $upthis";
$USERUPDATESET [] = "downloaded = downloaded + $truedownthis*3/10";
} elseif ($torrent ['sp_state'] == 1) { // Normal
$USERUPDATESET [] = "uploaded = uploaded + $upthis";
$USERUPDATESET [] = "downloaded = downloaded + $truedownthis";
}
}
} elseif ($global_promotion_state == 2) { // Free
if ($torrent ['owner'] == $userid && $uploaderdouble_torrent > 0)
$upthis = $trueupthis * $uploaderdouble_torrent;
$USERUPDATESET [] = "uploaded = uploaded + $upthis";
} elseif ($global_promotion_state == 3) { // 2X
if ($uploaderdouble_torrent > 2 && $torrent ['owner'] == $userid && $uploaderdouble_torrent > 0)
$upthis = $trueupthis * $uploaderdouble_torrent;
else
$upthis = 2 * $trueupthis;
$USERUPDATESET [] = "uploaded = uploaded + $upthis";
$USERUPDATESET [] = "downloaded = downloaded + $truedownthis";
} elseif ($global_promotion_state == 4) { // 2X Free
if ($uploaderdouble_torrent > 2 && $torrent ['owner'] == $userid && $uploaderdouble_torrent > 0)
$upthis = $trueupthis * $uploaderdouble_torrent;
else
$upthis = 2 * $trueupthis;
$USERUPDATESET [] = "uploaded = uploaded + $upthis";
} elseif ($global_promotion_state == 5) { // 50%
if ($torrent ['owner'] == $userid && $uploaderdouble_torrent > 0)
$upthis = $trueupthis * $uploaderdouble_torrent;
$USERUPDATESET [] = "uploaded = uploaded + $upthis";
$USERUPDATESET [] = "downloaded = downloaded + $truedownthis/2";
} elseif ($global_promotion_state == 6) { // 2X 50%
if ($uploaderdouble_torrent > 2 && $torrent ['owner'] == $userid && $uploaderdouble_torrent > 0)
$upthis = $trueupthis * $uploaderdouble_torrent;
else
$upthis = 2 * $trueupthis;
$USERUPDATESET [] = "uploaded = uploaded + $upthis";
$USERUPDATESET [] = "downloaded = downloaded + $truedownthis/2";
} elseif ($global_promotion_state == 7) { // 30%
if ($torrent ['owner'] == $userid && $uploaderdouble_torrent > 0)
$upthis = $trueupthis * $uploaderdouble_torrent;
$USERUPDATESET [] = "uploaded = uploaded + $upthis";
$USERUPDATESET [] = "downloaded = downloaded + $truedownthis*3/10";
}
}
}
$dt = sqlesc(date("Y-m-d H:i:s"));
$updateset = array();
// set non-type event
if (!isset ($event))
$event = "";
if (isset ($self) && $event == "stopped") {
sql_query("DELETE FROM peers WHERE $selfwhere") or err("删除P表失败（请向程序员汇报这个信息）");
if (mysql_affected_rows()) {
$updateset [] = ($self ["seeder"] == "yes" ? "seeders = seeders - 1" : "leechers = leechers - 1");
sql_query("UPDATE snatched SET uploaded = uploaded + $trueupthis, downloaded = downloaded + $truedownthis, to_go = $left, $announcetime, last_action = " . $dt . " WHERE torrentid = $torrentid AND userid = $userid") or err("更新S表失败1（请向程序员汇报这个信息）");
}
} elseif (isset ($self)) {
if ($event == "completed") {
$finished = ", finishedat = " . TIMENOW;
$finished_snatched = ", completedat = " . $dt . ", finished = 'yes'";
$updateset [] = "times_completed = times_completed + 1";
}
sql_query("UPDATE peers SET " . ($ipv4 == "" ? "" : "ipv4 = " . sqlesc($ipv4) . ", ") . ($ipv6 == "" ? "" : "ipv6 = " . sqlesc($ipv6) . ", ") . "port = $port, uploaded = $uploaded, downloaded = $downloaded, to_go = $left, prev_action = last_action, last_action = $dt, seeder = '$seeder', agent = " . sqlesc($agent) . " $finished WHERE $selfwhere LIMIT 1") or err("更新P表失败（请向程序员汇报这个信息）");
if (mysql_affected_rows()) {
if ($seeder != $self ["seeder"]) {
$updateset [] = ($seeder == "yes" ? "seeders = seeders + 1, leechers = leechers - 1" : "seeders = seeders - 1, leechers = leechers + 1");
}
sql_query("UPDATE snatched SET uploaded = uploaded + $trueupthis, downloaded = downloaded + $truedownthis, to_go = $left, $announcetime, last_action = " . $dt . " $finished_snatched WHERE torrentid = $torrentid AND userid = $userid") or err("更新S表失败2（请向程序员汇报这个信息）");
}
} else {
if ($event != "stopped") {
if (!mysql_fetch_assoc(sql_query("SELECT $fields FROM peers WHERE $selfwhere LIMIT 1"))) {
// sql_query ( "INSERT INTO peers (torrent, userid, peer_id, " . ($ipv4 == "" ? "" : "ipv4, ") . ($ipv6 == "" ? "" : "ipv6, ") . "port, connectable, uploaded, downloaded, to_go, started, last_action, seeder, agent, downloadoffset, uploadoffset, passkey) VALUES ($torrentid, $userid, " . sqlesc ( $peer_id ) . ", " . ($ipv4 == "" ? "" : sqlesc ( $ipv4 ) . ", ") . ($ipv6 == "" ? "" : sqlesc ( $ipv6 ) . ", ") . "$port, '$connectable', $uploaded, $downloaded, $left, $dt, $dt, '$seeder', " . sqlesc ( $agent ) . ", $downloaded, $uploaded, " . sqlesc ( $passkey ) . ")" ) or err ( "插入P表失败（请向程序员汇报这个信息）" );
sql_query("INSERT INTO peers (torrent, userid, peer_id, " . ($ipv4 == "" ? "" : "ipv4, ") . ($ipv6 == "" ? "" : "ipv6, ") . " port, uploaded, downloaded, to_go, started, last_action, seeder, agent, downloadoffset, uploadoffset, passkey) VALUES ($torrentid, $userid, " . sqlesc($peer_id) . ", " . ($ipv4 == "" ? "" : sqlesc($ipv4) . ", ") . ($ipv6 == "" ? "" : sqlesc($ipv6) . ", ") . "$port, $uploaded, $downloaded, $left, $dt, $dt, '$seeder', " . sqlesc($agent) . ", $downloaded, $uploaded, " . sqlesc($passkey) . ")") or err("插入P表失败（请向程序员汇报这个信息）");
if (mysql_affected_rows()) {
$updateset [] = ($seeder == "yes" ? "seeders = seeders + 1" : "leechers = leechers + 1");
$check = @mysql_fetch_row(@sql_query("SELECT COUNT(*) FROM snatched WHERE torrentid = $torrentid AND userid = $userid"));
if (!$check ['0'])
sql_query("INSERT INTO snatched (torrentid, userid, ip, port, uploaded, downloaded, to_go, startdat, last_action) VALUES ($torrentid, $userid, " . sqlesc($ip) . ", $port, $uploaded, $downloaded, $left, $dt, $dt)") or err("插入S表失败（请向程序员汇报这个信息）");
else
sql_query("UPDATE snatched SET to_go = $left, last_action = " . $dt . " WHERE torrentid = $torrentid AND userid = $userid") or err("更新S表失败3（请向程序员汇报这个信息）");
}
}
}
}
if (count($updateset)) { // Update only when there is change in peer counts
$updateset [] = "visible = 'yes'";
$updateset [] = "last_action = $dt";
if ($seeder == "yes") {
$updateset [] = "last_seed = $dt";
if ($torrent ['lastseed'] < $torrent ['lastreseed'])
$USERUPDATESET [] = "seedbonus = seedbonus + 90.0"; // 响应续种请求
}
sql_query("UPDATE torrents SET " . join(", ", $updateset) . " WHERE id = " . $torrentid) or err("更新T表失败（请向程序员汇报这个信息）");
}
if ($client_familyid != 0 && $client_familyid != $az ['clientselect'])
$USERUPDATESET [] = "clientselect = " . sqlesc($client_familyid);
if (count($USERUPDATESET) && $userid) {
sql_query("UPDATE users SET " . join(",", $USERUPDATESET) . " WHERE id = " . $userid) or err("更新U表失败（请向程序员汇报这个信息）");
}
/* 与下载客户端交互 */
benc_resp($rep_dict);
/* 与下载客户端交互 */
function check_tjuip($nip)
{
static $nontjuip = null;
global $Cache;
empty($nontjuip) && $nontjuip = $Cache->get_value('nontjuip');
if (!$nontjuip) {
$nontjuip = array();
$res = sql_query("SELECT * FROM nontjuip");
while ($row = mysql_fetch_array($res)) {
$nontjuip[] = $row;
}
$Cache->cache_value('nontjuip', $nontjuip, 3600);
}
foreach ($nontjuip as $row) {
if ($nip >= $row['first'] && $nip <= $row['last']) {
return FALSE;
}
}
return TRUE;
}