From aeda1d2718a151b937712ad24fbe8b2df91a0f11 Mon Sep 17 00:00:00 2001
From: mykola2312 <49044616+mykola2312@users.noreply.github.com>
Date: Fri, 18 Mar 2022 20:13:10 +0200
Subject: [PATCH] retracker: implemented proxy-announcing to all trackers
 registered in database & retrieve peers to database.

---
 tracker.php | 79 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 tracker.php

diff --git a/tracker.php b/tracker.php
new file mode 100644
index 0000000..6efac53
--- /dev/null
+++ b/tracker.php
@@ -0,0 +1,79 @@
+<?php
+require("../php/config.php");
+require("bencoder.php");
+require("peer.php");
+$ANN_USERAGENT = "Transmission/3.00";
+$ANN_PEER_ID = "01234567890123456789";
+$DB_NAME = "torrent";
+
+class Tracker {
+    const ANN_USERAGENT = "Transmission/3.00";
+    const ANN_PEER_ID = "01234567890123456789";
+
+    protected $proto;
+    protected $host;
+    protected $port;
+    protected $path;
+    protected $passkey;
+    protected $proxy;
+
+    public function __toString() {
+        return $this->proto . "://" . $this->host
+            . ":" . $this->port . $this->path;
+    }
+
+    public function getHttpUrl() {
+        return $this->proto . "://" . $this->host . $this->path;
+    }
+
+    public function doHttpAnnounce($infoHash, $peerIp, $peerPort, $peerId = null, $uploaded = 0, $downloaded = 0, $left = 0) {
+        $peers = array();
+
+        $passkey = is_null($this->passkey) ? "" : $this->passkey . "&";
+        $params = http_build_query(array(
+            "info_hash" => hash_encode($infoHash),
+            "peer_id" => is_null($peerId) ? self::ANN_PEER_ID : $peerId,
+            "ip" => $peerIp,
+            "port" => $peerPort,
+            "uploaded" => $uploaded,
+            "downloaded" => $downloaded,
+            "left" => $left,
+        ));
+
+        $ch = curl_init();
+        curl_setopt($ch, CURLOPT_URL, $this->getHttpUrl() . "?" . $passkey . $params);
+        curl_setopt($ch, CURLOPT_PORT, intval($this->port));
+        curl_setopt($ch, CURLOPT_USERAGENT, self::ANN_USERAGENT);
+        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
+        if (!is_null($this->proxy)) {
+            curl_setopt($ch, CURLOPT_PROXY, $this->proxy);
+        }
+
+        $result = curl_exec($ch);
+        $code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+        curl_close($ch);
+        if ($code != 200 || $result == false) {
+            return false;
+        }
+
+        $response = bdecode($result);
+        $peersEnc = $response["peers"];
+        for ($i = 0; $i < strlen($peersEnc); $i+=6) {
+            $remoteIp = long2ip(unpack("N", $peersEnc, $i)[1]);
+            $remotePort = unpack("n", $peersEnc, $i + 4)[1];
+            array_push($peers, new Peer($infoHash, $remoteIp, $remotePort));
+        }
+
+        return $peers;
+    }
+
+    public function announce($infoHash, $peerIp, $peerPort, $peerId = null, $uploaded = 0, $downloaded = 0, $left = 0) {
+        if ($this->proto == "http" || $this->proto == "https") {
+            return $this->doHttpAnnounce($infoHash, $peerIp, $peerPort, $peerId, $uploaded, $downloaded, $left);
+        }
+
+        return false;
+    }
+}
+
+?>
\ No newline at end of file