### Initiate Tracker Spoofing - C#

Source: https://context7.com/nikolayit/ratiomaster.net/llms.txt

This C# method, StartButton_Click(), is called when the user initiates the torrent spoofing process. It performs input validation, sets up client and torrent objects, opens a TCP listener, sends the initial 'started' event to the tracker, and starts timers for periodic updates and auto-stopping based on configured ratios. Dependencies include UI elements for configuration and utility classes like TorrentClientFactory.

```csharp
private void StartButton_Click(object sender, EventArgs e)
{
    // Validation checks performed:
    // 1. Verify tracker URL is not empty
    if (string.IsNullOrEmpty(trackerAddress.Text))
    {
        MessageBox.Show("Please select .torrent file or enter tracker address");
        return;
    }

    // 2. Validate numeric fields (port, interval, etc.)
    int res;
    bool bCheck = int.TryParse(txtStopValue.Text, out res);
    if (!bCheck || (res < 1000 && res != 0))
    {
        MessageBox.Show("Please select valid number for Remaining Work");
        return;
    }

    // Initialize spoofing session
    updateProcessStarted = true;
    seedMode = false;
    requestScrap = checkRequestScrap.Checked;

    // Disable UI controls during spoofing
    StartButton.Enabled = false;
    StopButton.Enabled = true;
    manualUpdateButton.Enabled = true;
    cmbClient.Enabled = false;
    trackerAddress.ReadOnly = true;

    // Create configured client emulation
    currentClient = TorrentClientFactory.GetClient("uTorrent 3.3.2");
    // Returns TorrentClient with uTorrent-specific headers and peer ID

    // Create torrent info with current state
    currentTorrent = getCurrentTorrent();
    // Builds TorrentInfo with:
    // - uploaded: 2621440000 (2.5 GB)
    // - downloaded: 4026531840 (3.75 GB)
    // - left: 1748342760 (35% remaining of 5 GB torrent)
    // - uploadRate: random between 61440-102400 bytes/s
    // - downloadRate: random between 30720-51200 bytes/s

    // Get proxy configuration
    currentProxy = getCurrentProxy();
    // Returns ProxyInfo with SOCKS5 settings or null for direct connection

    // Add client info to log
    AddClientInfo();
    // Logs: "Client: uTorrent 3.3.2, Peer ID: -UT332S-Xa9Bm2Pq8Nk1"

    // Open TCP listener on random port for incoming connections
    OpenTcpListener();
    // Opens port 52341 and starts accepting connections

    // Launch background thread to send initial tracker request
    Thread myThread = new Thread(startProcess);
    myThread.Name = "startProcess() Thread";
    myThread.Start();
    // Sends: http://tracker.example.com:6969/announce?
    //        info_hash=%3F%8A%9D%2E...&peer_id=-UT332S-...&
    //        uploaded=2621440000&downloaded=4026531840&left=1748342760&
    //        event=started

    // Start periodic update timer (ticks every second)
    serverUpdateTimer.Start();
    // Every 1800 seconds, sends update request without "event" parameter

    // Start auto-stop timer if configured
    if (cmbStopAfter.SelectedItem == "After ratio reaches:")
    {
        RemaningWork.Start();
        // Monitors: uploaded/downloaded >= 1.5
    }

    // Request scrape data for peer statistics
    requestScrapFromTracker(currentTorrent);
    // Sends: http://tracker.example.com:6969/scrape?
    //        info_hash=%3F%8A%9D%2E...
    // Response parsed to extract seeders/leechers counts
}

// Tracker sees announce request with "started" event
// Tracker Response: d8:completei423e10:incompletei89e8:intervali1800e...
// Parsed to: 423 seeders, 89 leechers, update every 1800 seconds
// UI updates: "Seeders: 423, Leechers: 89, Next update: 30:00"

```

--------------------------------

### Construct Announce URL with Placeholder Replacement (C#)

Source: https://context7.com/nikolayit/ratiomaster.net/llms.txt

Builds a tracker announce URL by starting with the tracker's base URL and appending a query string. It replaces placeholders like {infohash}, {peerid}, and others within a client-specific query template with actual torrent data.

```csharp
// Helper function to construct announce URL
private string getUrlString(TorrentInfo torrent, string eventParam)
{
    // Start with tracker base URL
    string url = torrent.tracker;
    if (!url.EndsWith("?")) url += "?";

    // Get client query template
    string query = currentClient.Query;

    // Replace placeholders with actual values
    query = query.Replace("{infohash}", HashUrlEncode(torrent.hash, currentClient.HashUpperCase));
    query = query.Replace("{peerid}", HttpUtility.UrlEncode(torrent.peerID));
    query = query.Replace("{port}", torrent.port);
    query = query.Replace("{uploaded}", torrent.uploaded.ToString());
    query = query.Replace("{downloaded}", torrent.downloaded.ToString());
    query = query.Replace("{left}", torrent.left.ToString());
    query = query.Replace("{numwant}", torrent.numberOfPeers);
    query = query.Replace("{key}", torrent.key);
    query = query.Replace("{localip}", Functions.GetIp());
    query = query.Replace("{event}", eventParam);

    return url + query;
}
```

--------------------------------

### Configure and Connect via Proxy - C#

Source: https://context7.com/nikolayit/ratiomaster.net/llms.txt

This C# code configures proxy settings (SOCKS4, SOCKS4a, SOCKS5, HTTP CONNECT) with optional authentication and establishes a socket connection to a tracker through the specified proxy. It sends an HTTP GET request and receives the response, routing all traffic via the proxy. Dependencies include custom Socket classes for different proxy types and standard .NET networking libraries.

```csharp
// Configure SOCKS5 proxy
ProxyInfo proxy = new ProxyInfo();
proxy.UseProxy = true;
proxy.ProxyType = "SOCKS5";
proxy.Host = "192.168.1.100";
proxy.Port = 1080;
proxy.Username = "proxyuser";
proxy.Password = "proxypass123";

// Create socket with proxy support
Socket socket = null;

if (proxy.UseProxy)
{
    switch (proxy.ProxyType.ToUpper())
    {
        case "SOCKS4":
            socket = new Socket_Socks4(proxy.Host, proxy.Port);
            break;

        case "SOCKS4A":
            socket = new Socket_Socks4a(proxy.Host, proxy.Port);
            break;

        case "SOCKS5":
            socket = new Socket_Socks5(proxy.Host, proxy.Port);
            // Set authentication if provided
            if (!string.IsNullOrEmpty(proxy.Username))
            {
                ((Socket_Socks5)socket).ProxyUser = proxy.Username;
                ((Socket_Socks5)socket).ProxyPassword = proxy.Password;
            }
            break;

        case "HTTP":
        case "CONNECT":
            socket = new Socket_HttpConnect(proxy.Host, proxy.Port);
            if (!string.IsNullOrEmpty(proxy.Username))
            {
                ((Socket_HttpConnect)socket).ProxyUser = proxy.Username;
                ((Socket_HttpConnect)socket).ProxyPassword = proxy.Password;
            }
            break;

        default:
            throw new Exception("Unsupported proxy type: " + proxy.ProxyType);
    }
}
else
{
    // Direct connection without proxy
    socket = new Socket_None();
}

// Connect to tracker through proxy
string trackerHost = "tracker.example.com";
int trackerPort = 6969;

try
{
    socket.Connect(trackerHost, trackerPort);
    // For SOCKS5, this sends:
    // 1. SOCKS5 greeting: 0x05 0x02 0x00 0x02 (version, methods)
    // 2. Authentication: 0x01 [username length] [username] [password length] [password]
    // 3. Connection request: 0x05 0x01 0x00 0x03 [host length] [host] [port]
    // 4. Proxy responds with connection status

    // Now socket is connected to tracker through proxy
    // Send tracker announce request
    string request = "GET /announce?info_hash=... HTTP/1.1\r\n";
    request += "Host: " + trackerHost + "\r\n";
    request += "User-Agent: uTorrent/3320\r\n";
    request += "Connection: close\r\n\r\n";

    byte[] requestBytes = Encoding.ASCII.GetBytes(request);
    socket.Send(requestBytes, requestBytes.Length, SocketFlags.None);

    // Receive response through proxy
    byte[] buffer = new byte[8192];
    int bytesRead = socket.Receive(buffer, buffer.Length, SocketFlags.None);
    string response = Encoding.ASCII.GetString(buffer, 0, bytesRead);

    socket.Close();
}
catch (Exception ex)
{
    Log("Proxy connection failed: " + ex.Message);
    // Common errors:
    // - "Proxy authentication failed"
    // - "SOCKS5 connection rejected"
    // - "Proxy unreachable"
}

// Example complete proxy flow:
// 1. Application connects to SOCKS5 proxy at 192.168.1.100:1080
// 2. Sends authentication: username "proxyuser", password "proxypass123"
// 3. Proxy validates credentials
// 4. Application requests connection to tracker.example.com:6969
// 5. Proxy establishes connection to tracker
// 6. All subsequent traffic routed through proxy
// 7. Tracker sees proxy IP instead of real IP
// 8. Responses come back through same proxy tunnel

```

--------------------------------

### Scrape torrent statistics from tracker in C#

Source: https://context7.com/nikolayit/ratiomaster.net/llms.txt

Converts announce URL to scrape format, sends HTTP GET request to tracker, and parses bencoded response to extract seeders/leechers counts. Handles network errors and unsupported scrape responses. Requires TorrentInfo object with tracker URL and hash.

```csharp
private void requestScrapeFromTracker(TorrentInfo torrent)
{
    try
    {
        string scrapeUrl = getScrapeUrlString(torrent);
        scrapeUrl += "?info_hash=" + HashUrlEncode(torrent.hash, currentClient.HashUpperCase);
        Log(">> Scrape request: " + scrapeUrl);
        Uri uri = new Uri(scrapeUrl);
        Socket socket = createSocket();
        socket.Connect(uri.Host, uri.Port);
        string request = "GET " + uri.PathAndQuery + " HTTP/1.1\r\n";
        request += "Host: " + uri.Host + "\r\n";
        request += "User-Agent: " + currentClient.Headers.Split(new[] {"User-Agent: "}, StringSplitOptions.None)[1].Split('\r')[0] + "\r\n";
        request += "Accept: */*\r\n";
        request += "Connection: close\r\n";
        request += "\r\n";
        byte[] requestBytes = Encoding.ASCII.GetBytes(request);
        socket.Send(requestBytes, requestBytes.Length, SocketFlags.None);
        MemoryStream responseStream = new MemoryStream();
        byte[] buffer = new byte[8192];
        int bytesRead;
        do
        {
            bytesRead = socket.Receive(buffer, buffer.Length, SocketFlags.None);
            responseStream.Write(buffer, 0, bytesRead);
        } while (bytesRead > 0);
        socket.Close();
        TrackerResponse response = new TrackerResponse(responseStream);
        MemoryStream bodyStream = new MemoryStream(Encoding.ASCII.GetBytes(response.Body));
        ValueDictionary scrapeData = (ValueDictionary)BEncode.Parse(bodyStream);
        if (scrapeData.Contains("files"))
        {
            ValueDictionary files = (ValueDictionary)scrapeData["files"];
            foreach (string key in files.Keys)
            {
                ValueDictionary stats = (ValueDictionary)files[key];
                int complete = 0;
                int incomplete = 0;
                int downloaded = 0;
                if (stats.Contains("complete"))
                {
                    complete = (int)((ValueNumber)stats["complete"]).Integer;
                }
                if (stats.Contains("incomplete"))
                {
                    incomplete = (int)((ValueNumber)stats["incomplete"]).Integer;
                }
                if (stats.Contains("downloaded"))
                {
                    downloaded = (int)((ValueNumber)stats["downloaded"]).Integer;
                }
                Seeders = complete;
                Leechers = incomplete;
                Log("<< Scrape response received:");
                Log("   Seeders: " + complete);
                Log("   Leechers: " + incomplete);
                Log("   Completed downloads: " + downloaded);
                updateScrapStats(complete.ToString(), incomplete.ToString(),
                                (complete + incomplete).ToString());
            }
        }
        else if (scrapeData.Contains("failure reason"))
        {
            string failureReason = BEncode.String(scrapeData["failure reason"]);
            Log("Scrape failed: " + failureReason);
        }
        else
        {
            Log("Scrape response format not recognized");
        }
    }
    catch (Exception ex)
    {
        Log("Scrape error: " + ex.Message);
    }
}
```

```csharp
private string getScrapeUrlString(TorrentInfo torrent)
{
    string scrapeUrl = torrent.tracker;
    if (scrapeUrl.Contains("/announce"))
    {
        scrapeUrl = scrapeUrl.Replace("/announce", "/scrape");
    }
    return scrapeUrl;
}
```

--------------------------------

### Initialize and Configure TorrentInfo Structure in C#

Source: https://context7.com/nikolayit/ratiomaster.net/llms.txt

Illustrates how to create and configure a TorrentInfo structure, which holds all essential data for a torrent spoofing session. It covers setting up tracker URLs, hash values, file information, transfer rates, and other parameters.

```csharp
// Initialize a new torrent info structure
TorrentInfo torrentInfo = new TorrentInfo(
    uploaded: 5368709120,      // 5 GB already uploaded
    downloaded: 2147483648      // 2 GB already downloaded
);

// Configure torrent parameters
torrentInfo.tracker = "http://tracker.example.com:6969/announce";
torrentInfo.hash = "3F8A9D2E1C4B7F6E5A9C8D3E2F1A0B9C8D7E6F5A";
torrentInfo.filename = "Ubuntu-22.04-desktop-amd64.iso";
torrentInfo.totalsize = 3774873600;  // Total torrent size in bytes
torrentInfo.left = 1627390480;        // Remaining bytes to download

// Set transfer rates (in bytes per second)
torrentInfo.uploadRate = 61440;       // 60 KB/s upload
torrentInfo.downloadRate = 30720;     // 30 KB/s download

// Tracker communication settings
torrentInfo.interval = 1800;          // Update interval in seconds (30 minutes)
torrentInfo.numberOfPeers = "200";    // Number of peers to request

// Auto-generated random values
torrentInfo.port = "52341";           // Random port between 1025-65535
torrentInfo.key = "847";              // Random key for tracker identification

// Peer identification (set by client factory)
torrentInfo.peerID = "-UT332S-Xa9Bm2Pq8Nk1";  // Client-specific peer ID

// Parse tracker URI for easy access
torrentInfo.trackerUri = new Uri(torrentInfo.tracker);
```

--------------------------------

### TorrentClientFactory.GetClient() for BitTorrent Client Emulation (C#)

Source: https://context7.com/nikolayit/ratiomaster.net/llms.txt

Creates and configures a TorrentClient object to emulate a specific BitTorrent client version. This includes setting up necessary HTTP headers, peer ID format, query parameters, and client-specific settings required for successful tracker communications. The returned object contains details like client name, PeerID format, Key format, HTTP protocol, Headers, Query template, DefNumWant, and HashUpperCase.

```csharp
TorrentClient client = TorrentClientFactory.GetClient("BitComet 1.20");

// The returned client object contains:
// - Name: "BitComet 1.20"
// - PeerID: "-BC0120-" + random 12 character string
// - Key: Random 5-digit numeric string
// - HttpProtocol: "HTTP/1.1"
// - Headers: Full HTTP headers including User-Agent
// - Query: Complete query string template with placeholders
// - DefNumWant: 200 (default number of peers to request)
// - HashUpperCase: true (uppercase hash encoding)

// Headers include:
// "Host: {host}\r\n"
// "Connection: close\r\n"
// "Accept: */*\r\n"
// "Accept-Encoding: gzip\r\n"
// "User-Agent: BitComet/1.20.3.25\r\n"
// "Pragma: no-cache\r\n"
// "Cache-Control: no-cache\r\n"

// Query template:
// "info_hash={infohash}&peer_id={peerid}&port={port}&natmapped=1&localip={localip}"
// "&port_type=wan&uploaded={uploaded}&downloaded={downloaded}&left={left}"
// "&numwant={numwant}&compact=1&no_peer_id=1&key={key}{event}"

// Example usage with uTorrent 3.3.2:
TorrentClient utorrent = TorrentClientFactory.GetClient("uTorrent 3.3.2");
// PeerID format: "-UT332S-" + random characters
// User-Agent: "uTorrent/3320(25824)(server)(46680)"
// Different query string and parameters than BitComet
```

--------------------------------

### Parse BEncoded Data in C#

Source: https://context7.com/nikolayit/ratiomaster.net/llms.txt

Demonstrates parsing of BitTorrent bencoded data using the BEncode class. It shows how to read integers, strings, lists, and dictionaries, along with accessing data within the parsed structure.

```csharp
FileStream fs = File.OpenRead("C:\\Downloads\\example.torrent");
ValueDictionary torrentData = (ValueDictionary)BEncode.Parse(fs);
fs.Close();

string announceUrl = BEncode.String(torrentData["announce"]);

ValueDictionary info = (ValueDictionary)torrentData["info"];

long pieceLength = ((ValueNumber)info["piece length"]).Integer;

ValueString pieces = (ValueString)info["pieces"];
byte[] pieceHashes = pieces.Bytes;

string torrentName = BEncode.String(info["name"]);

if (info.Contains("length"))
{
    long fileSize = ((ValueNumber)info["length"]).Integer;
}

if (info.Contains("files"))
{
    ValueList files = (ValueList)info["files"];
    foreach (ValueDictionary file in files)
    {
        long fileLength = ((ValueNumber)file["length"]).Integer;
        ValueList pathComponents = (ValueList)file["path"];
        string filePath = string.Empty;
        foreach (ValueString component in pathComponents)
        {
            filePath += component.String + "/";
        }
    }
}

bool hasComment = torrentData.Contains("comment");
if (hasComment)
{
    string comment = BEncode.String(torrentData["comment"]);
}
```

--------------------------------

### Update Torrent Statistics with Realistic Randomization

Source: https://context7.com/nikolayit/ratiomaster.net/llms.txt

Calculates new fake upload and download statistics based on configured rates and elapsed time. Applies randomization for realistic variance and rounds values to appropriate denominators. Updates remaining bytes while respecting completion percentage constraints and switches to seed mode when download completes.

```csharp
// Called every second by serverUpdateTimer
private void updateCounters(TorrentInfo torrent)
{
    // Current state before update:
    // torrent.uploaded = 5368709120 (5.00 GB)
    // torrent.downloaded = 4026531840 (3.75 GB)
    // torrent.left = 1748342760 (1.63 GB of 5.75 GB total)
    // torrent.uploadRate = 81920 (80 KB/s, randomized between 60-100)
    // torrent.downloadRate = 40960 (40 KB/s, randomized between 30-50)
    // Elapsed time: 1 second since last update

    // Calculate upload increment
    long uploadIncrement = torrent.uploadRate * 1;  // 81920 bytes
    torrent.uploaded += uploadIncrement;
    // New uploaded: 5368709120 + 81920 = 5368791040 bytes

    // Round upload to 16384 (16 KB) for realism
    torrent.uploaded = RoundByDenominator(torrent.uploaded, 16384);
    // Rounded to: 5368774656 bytes (327744 * 16384)

    // Calculate download increment
    long downloadIncrement = torrent.downloadRate * 1;  // 40960 bytes
    torrent.downloaded += downloadIncrement;
    // New downloaded: 4026531840 + 40960 = 4026572800 bytes

    // Round download to 16384
    torrent.downloaded = RoundByDenominator(torrent.downloaded, 16384);
    // Rounded to: 4026580992 bytes (245760 * 16384)

    // Update remaining bytes (decrease by download amount)
    torrent.left -= downloadIncrement;
    // New left: 1748342760 - 40960 = 1748301800 bytes

    // Ensure left doesn't go negative
    if (torrent.left < 0)
    {
        torrent.left = 0;
        seedMode = true;  // Switch to seeding mode
    }

    // Ensure left doesn't exceed total size minus downloaded
    long calculatedLeft = torrent.totalsize - torrent.downloaded;
    if (torrent.left > calculatedLeft)
    {
        torrent.left = calculatedLeft;
    }

    // Update UI with new values
    // uploadedAmount.Text = "5.00 GB"
    // downloadedAmount.Text = "3.75 GB"
    // remainingAmount.Text = "1.63 GB"
    // currentRatio.Text = "1.33"

    // After 1800 seconds (30 minutes) at these rates:
    // Uploaded: 5368774656 + (81920 * 1800) = 5516230656 (5.14 GB)
    // Downloaded: 4026580992 + (40960 * 1800) = 4100308992 (3.82 GB)
    // Left: 1748301800 - (40960 * 1800) = 1674573800 (1.56 GB)
    // Ratio: 5.14 / 3.82 = 1.35
}

private long RoundByDenominator(long value, int denominator)
{
    // Round 5368791040 to nearest 16384
    // 5368791040 / 16384 = 327745.3906...
    // Math.Round(327745.3906) = 327745
    // 327745 * 16384 = 5368774656
    return (long)Math.Round((double)value / denominator) * denominator;
}
```

--------------------------------

### Send Tracker Event (C#)

Source: https://context7.com/nikolayit/ratiomaster.net/llms.txt

This C# code snippet demonstrates the `sendEventToTracker` function, which constructs and sends HTTP requests to BitTorrent trackers. It handles proxy connections, parses tracker responses, and extracts peer list information.

```csharp
private void sendEventToTracker(TorrentInfo torrentInfo, string eventParam)
{
    try
    {
        string announceUrl = getUrlString(torrentInfo, eventParam);
        Uri trackerUri = new Uri(announceUrl);
        string host = trackerUri.Host;
        int port = trackerUri.Port;
        string path = trackerUri.PathAndQuery;

        Socket socket = createSocket();
        if (currentProxy != null && currentProxy.UseProxy)
        {
            socket = new Socket_Socks5(currentProxy.Host, currentProxy.Port);
            ((Socket_Socks5)socket).ProxyUser = currentProxy.Username;
            ((Socket_Socks5)socket).ProxyPassword = currentProxy.Password;
        }

        socket.Connect(host, port);
        string request = "GET " + path + " HTTP/1.1\r\n";
        request += currentClient.Headers.Replace("{host}", host);
        request += "\r\n";

        byte[] requestBytes = Encoding.ASCII.GetBytes(request);
        socket.Send(requestBytes, requestBytes.Length, SocketFlags.None);

        MemoryStream responseStream = new MemoryStream();
        byte[] buffer = new byte[8192];
        int bytesRead;
        do
        {
            bytesRead = socket.Receive(buffer, buffer.Length, SocketFlags.None);
            responseStream.Write(buffer, 0, bytesRead);
        } while (bytesRead > 0);

        socket.Close();
        TrackerResponse response = new TrackerResponse(responseStream);

        if (response.doRedirect)
        {
            Log("Redirected to: " + response.RedirectionURL);
            return;
        }

        MemoryStream bodyStream = new MemoryStream(Encoding.ASCII.GetBytes(response.Body));
        ValueDictionary trackerResponse = (ValueDictionary)BEncode.Parse(bodyStream);

        if (trackerResponse.Contains("failure reason"))
        {
            string failureReason = BEncode.String(trackerResponse["failure reason"]);
            Log("ERROR: " + failureReason);
            return;
        }

        if (trackerResponse.Contains("interval"))
        {
            int interval = (int)((ValueNumber)trackerResponse["interval"].Integer);
            torrentInfo.interval = interval;
            Log("Interval: " + interval + " seconds");
        }

        if (trackerResponse.Contains("complete"))
        {
            Seeders = (int)((ValueNumber)trackerResponse["complete"].Integer);
            Log("Seeders: " + Seeders);
        }

        if (trackerResponse.Contains("incomplete"))
        {
            Leechers = (int)((ValueNumber)trackerResponse["incomplete"].Integer);
            Log("Leechers: " + Leechers);
        }

        if (trackerResponse.Contains("peers"))
        {
            ValueString peers = (ValueString)trackerResponse["peers"];
            int peerCount = peers.Bytes.Length / 6;
        }
    }
    catch (Exception ex)
    {
        Log("Error sending event to tracker: " + ex.Message);
    }
}
```

--------------------------------

### Log Torrent Peer Count and Update UI (C#)

Source: https://context7.com/nikolayit/ratiomaster.net/llms.txt

Logs the number of peers returned from a tracker response and updates the UI with seeding and leeching statistics. This function handles success logging and potential exceptions during the process.

```csharp
Log("Peers returned: " + peerCount);  // 200 peers
            torrentInfo.numberOfPeers = peerCount.ToString();
        }

        // Log success
        Log("<< Response received: SUCCESS");
        Log("Next update in " + interval + " seconds");

        // Update UI
        updateScrapStats(Seeders.ToString(), Leechers.ToString(),
                        torrentInfo.numberOfPeers);
    }
    catch (Exception ex)
    {
        Log("ERROR: " + ex.Message);
        // Handle network errors, malformed responses, etc.
    }
}
```

--------------------------------

### Randomize Torrent Speeds with Timer in C#

Source: https://context7.com/nikolayit/ratiomaster.net/llms.txt

Generates randomized upload and download speeds within configured ranges to simulate realistic torrent client behavior. Reads min/max values from UI controls, handles seeding mode differently from downloading mode, updates UI displays, and logs all changes. Uses a timer-based auto-randomization mechanism with configurable intervals between 60-300 seconds.

```csharp
// Called periodically (every 60-300 seconds randomly) to vary speeds
private void randomiseSpeeds(TorrentInfo torrent)
{
    // User configured speed ranges in UI:
    // Upload: Min = 60 KB/s, Max = 100 KB/s
    // Download: Min = 30 KB/s, Max = 50 KB/s

    // Read configured values from UI
    string minUpload = minUploadRate.Text;    // "60"
    string maxUpload = maxUploadRate.Text;    // "100"
    string minDownload = minDownloadRate.Text;  // "30"
    string maxDownload = maxDownloadRate.Text;  // "50"

    // Generate random upload speed within range
    int uploadSpeed = GetRandomSpeed(minUpload, maxUpload);
    // GetRandomSpeed randomly selects between min and max
    // Returns: 73 KB/s (random value between 60-100)

    torrent.uploadRate = uploadSpeed;
    // Converts to bytes: 73 * 1024 = 74752 bytes/s

    // Update UI display
    currentUploadRate.Text = uploadSpeed + " KB/s";

    // Handle download speed based on mode
    if (!seedMode)
    {
        // Still downloading - randomize download speed
        int downloadSpeed = GetRandomSpeed(minDownload, maxDownload);
        // Returns: 42 KB/s (random value between 30-50)

        torrent.downloadRate = downloadSpeed;
        // Converts to bytes: 42 * 1024 = 43008 bytes/s

        currentDownloadRate.Text = downloadSpeed + " KB/s";
    }
    else
    {
        // Seeding mode - no download
        torrent.downloadRate = 0;
        currentDownloadRate.Text = "0 KB/s";
    }

    // Log speed change
    Log("Speed randomized - Upload: " + torrent.uploadRate + " bytes/s, " +
        "Download: " + torrent.downloadRate + " bytes/s");

    // Example output over time:
    // T=0s:    Upload 75 KB/s, Download 38 KB/s
    // T=120s:  Upload 89 KB/s, Download 45 KB/s
    // T=240s:  Upload 63 KB/s, Download 31 KB/s
    // T=360s:  Upload 97 KB/s, Download 49 KB/s
    // T=480s:  Upload 71 KB/s, Download 35 KB/s
}

private int GetRandomSpeed(string min, string max)
{
    Random rand = new Random();

    // Parse min and max values
    int minn = int.Parse(min);  // 60
    int maxx = int.Parse(max);  // 100

    // Ensure min is actually minimum
    int minValue = GetMin(minn, maxx);  // 60
    int maxValue = GetMax(minn, maxx);  // 100

    // Generate random value in range
    int randomKBps = rand.Next(minValue, maxValue);  // 73

    // Convert to bytes per second
    return randomKBps * 1024;  // 74752 bytes/s
}

// Auto-randomization called from timer:
private void speedRandomizationTimer_Tick(object sender, EventArgs e)
{
    if (updateProcessStarted && currentTorrent.interval > 0)
    {
        randomiseSpeeds(ref currentTorrent);

        // Reset timer with new random interval (60-300 seconds)
        Random rand = new Random();
        int nextInterval = rand.Next(60, 300) * 1000;  // Convert to milliseconds
        speedRandomizationTimer.Interval = nextInterval;

        Log("Next speed randomization in " + (nextInterval/1000) + " seconds");
    }
}
```

--------------------------------

### Torrent.OpenTorrent() for .torrent File Parsing (C#)

Source: https://context7.com/nikolayit/ratiomaster.net/llms.txt

Parses a .torrent file to extract essential metadata, including tracker URLs, info hash, file list, piece information, and torrent size. This data is crucial for constructing proper tracker announce requests. The method returns a boolean indicating success and populates properties of the Torrent object if successful.

```csharp
// Create and open a torrent file
Torrent torrent = new Torrent();
bool success = torrent.OpenTorrent(@"C:\\Downloads\\example.torrent");

if (success)
{
    // Extract tracker announce URL
    string announceUrl = torrent.Announce;
    // Example: "http://tracker.example.com:6969/announce"

    // Get info hash (20-byte SHA-1 hash)
    byte[] infoHash = torrent.InfoHash;
    // Convert to hex string: "3F8A9D2E1C4B7F6E5A9C8D3E2F1A0B9C8D7E6F5A"

    // Get torrent name
    string name = torrent.Name;
    // Example: "Ubuntu-22.04-desktop-amd64.iso"

    // Get total size
    ulong totalSize = torrent.totalLength;
    // Example: 3774873600 bytes (3.52 GB)

    // Check if single or multi-file torrent
    bool isSingleFile = torrent.SingleFile;

    // Access file list
    foreach (TorrentFile file in torrent.PhysicalFiles)
    {
        string fileName = file.FileName;
        long fileSize = file.FileSize;
        // Process each file in the torrent
    }

    // Get number of pieces
    int pieceCount = torrent.Pieces;
    // Example: 14400 pieces

    // Access raw bencoded data
    ValueDictionary data = torrent.Data;
    string comment = torrent.Comment;
    string createdBy = torrent.CreatedBy;
}
else
{
    // Handle error - file not found or invalid torrent
    Console.WriteLine("Failed to open torrent file");
}
```

--------------------------------

### Parse Tracker HTTP Response

Source: https://context7.com/nikolayit/ratiomaster.net/llms.txt

Parses raw HTTP response from BitTorrent tracker handling chunked transfer encoding and gzip compression. Automatically handles HTTP redirects and extracts headers and body content. Returns structured tracker data including peer information and announce intervals.

```csharp
// Parse raw HTTP response from tracker
MemoryStream responseStream = new MemoryStream();
// Response contains:
// "HTTP/1.1 200 OK\r\n"
// "Content-Type: text/plain\r\n"
// "Content-Encoding: gzip\r\n"
// "Transfer-Encoding: chunked\r\n"
// "\r\n"
// "1A3\r\n"  // Chunk size in hex (419 bytes)
// [419 bytes of gzipped data]
// "\r\n"
// "0\r\n"    // End chunk
// "\r\n"

TrackerResponse response = new TrackerResponse(responseStream);

// Check for HTTP 302 redirect
if (response.doRedirect)
{
    string newUrl = response.RedirectionURL;
    // Example: "http://tracker2.example.com:8080/announce"
    // Handle redirect by making new request to newUrl
}

// Access parsed headers
string headers = response.Headers;
// Contains:
// "HTTP/1.1 200 OK\r\n"
// "Content-Type: text/plain\r\n"
// "Content-Encoding: gzip\r\n"
// "Transfer-Encoding: chunked\r\n"

// Check encoding
string encoding = response.ContentEncoding;
// Returns: "gzip"

string charset = response.Charset;
// Returns: "utf-8" if specified

// Access decoded body (automatically handles chunked + gzip)
string body = response.Body;
// Bencoded response body after decompression:
// "d8:completei423e10:downloadedi189742e10:incompletei89e8:intervali1800e"
// "12:min intervali900e5:peers600:[600 bytes of compact peer data]e"

// Parse bencoded body
MemoryStream bodyStream = new MemoryStream(Encoding.ASCII.GetBytes(body));
ValueDictionary trackerData = (ValueDictionary)BEncode.Parse(bodyStream);

// Extract tracker response fields
if (trackerData.Contains("failure reason"))
{
    string error = BEncode.String(trackerData["failure reason"]);
    // Example: "Torrent not registered"
    throw new Exception("Tracker error: " + error);
}

// Get announce interval
int interval = (int)((ValueNumber)trackerData["interval"]).Integer;
// Returns: 1800 (seconds)

// Get minimum interval
int minInterval = 0;
if (trackerData.Contains("min interval"))
{
    minInterval = (int)((ValueNumber)trackerData["min interval"]).Integer;
    // Returns: 900 (seconds)
}

// Get peer counts
int seeders = (int)((ValueNumber)trackerData["complete"]).Integer;
int leechers = (int)((ValueNumber)trackerData["incomplete"]).Integer;
// Returns: 423 seeders, 89 leechers

// Parse compact peer list (binary format)
ValueString peersData = (ValueString)trackerData["peers"];
byte[] peerBytes = peersData.Bytes;
int peerCount = peerBytes.Length / 6;  // 6 bytes per peer

for (int i = 0; i < peerCount; i++)
{
    int offset = i * 6;

    // Extract IP address (4 bytes)
    byte[] ipBytes = new byte[4];
    Array.Copy(peerBytes, offset, ipBytes, 0, 4);
    string ipAddress = string.Format("{0}.{1}.{2}.{3}",
        ipBytes[0], ipBytes[1], ipBytes[2], ipBytes[3]);

    // Extract port (2 bytes, big-endian)
    int port = (peerBytes[offset + 4] << 8) | peerBytes[offset + 5];

    // Example peer: 192.168.1.50:51413
}

// Handle dictionary-style peer list (non-compact)
if (trackerData.Contains("peers") && trackerData["peers"] is ValueList)
{
    ValueList peerList = (ValueList)trackerData["peers"];
    foreach (ValueDictionary peer in peerList)
    {
        string peerId = BEncode.String(peer["peer id"]);
        string ip = BEncode.String(peer["ip"]);
        int port = (int)((ValueNumber)peer["port"]).Integer;
        // Process each peer
    }
}
```

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