public void OnExtendedMessage(IPeerWireClient peerWireClient, byte[] bytes)
{
BDict d = (BDict)BencodingUtils.Decode(bytes);
if (d.ContainsKey("added") && d.ContainsKey("added.f"))
{
BString pexList = (BString)d["added"];
BString pexFlags = (BString)d["added.f"];
for (int i = 0; i < pexList.ByteValue.Length / 6; i++)
{
UInt32 ip = Unpack.UInt32(pexList.ByteValue, i * 6, Unpack.Endianness.Little);
UInt16 port = Unpack.UInt16(pexList.ByteValue, (i * 6) + 4, Unpack.Endianness.Big);
byte flags = pexFlags.ByteValue[i];
IPEndPoint ipAddr = new IPEndPoint(ip, port);
if (Added != null)
{
Added(peerWireClient, this, ipAddr, flags);
}
}
}
if (d.ContainsKey("dropped"))
{
BString pexList = (BString)d["dropped"];
for (int i = 0; i < pexList.ByteValue.Length / 6; i++)
{
UInt32 ip = Unpack.UInt32(pexList.ByteValue, i * 6, Unpack.Endianness.Little);
UInt16 port = Unpack.UInt16(pexList.ByteValue, (i * 6) + 4, Unpack.Endianness.Big);
IPEndPoint ipAddr = new IPEndPoint(ip, port);
if (Dropped != null)
{
Dropped(peerWireClient, this, ipAddr);
}
}
}
}
public void OnExtendedMessage(IPeerWireClient peerWireClient, byte[] bytes)
{
BDict dictionary = (BDict)BencodingUtils.Decode(bytes);
if (!dictionary.ContainsKey(ADDED_KEY) && !dictionary.ContainsKey(ADDED_FLAGS_KEY) && !dictionary.ContainsKey(DROPPED_KEY))
{
return;
}
if (dictionary.ContainsKey(ADDED_KEY) && dictionary.ContainsKey(ADDED_FLAGS_KEY))
{
var pexList = (BString)dictionary[ADDED_KEY];
var pexFlags = (BString)dictionary[ADDED_FLAGS_KEY];
for (int i = 0; i < pexList.ByteValue.Length / 6; i++)
{
var ip = Unpack.UInt32(pexList.ByteValue, i * 6, Unpack.Endianness.Little);
var port = Unpack.UInt16(pexList.ByteValue, (i * 6) + 4, Unpack.Endianness.Big);
var flags = pexFlags.ByteValue[i];
var ipAddr = new IPEndPoint(ip, port);
Added?.Invoke(peerWireClient, this, ipAddr, flags);
}
}
else //if (d.ContainsKey(DROPPED_KEY))
{
BString pexList = (BString)dictionary[DROPPED_KEY];
for (int i = 0; i < pexList.ByteValue.Length / 6; i++)
{
var ip = Unpack.UInt32(pexList.ByteValue, i * 6, Unpack.Endianness.Little);
var port = Unpack.UInt16(pexList.ByteValue, (i * 6) + 4, Unpack.Endianness.Big);
var ipAddr = new IPEndPoint(ip, port);
Dropped?.Invoke(peerWireClient, this, ipAddr);
}
}
}
public void OnHandshake(IPeerWireClient peerWireClient, byte[] handshake)
{
BDict dict = (BDict)BencodingUtils.Decode(handshake);
if (dict.ContainsKey("metadata_size"))
{
BInt size = (BInt)dict["metadata_size"];
this._metadataSize = size;
this._pieceCount = (Int64)Math.Ceiling((double)this._metadataSize / 16384);
}
this.RequestMetaData(peerWireClient);
}
public void OnExtendedMessage(IPeerWireClient peerWireClient, byte[] bytes)
{
BDict dict = (BDict)BencodingUtils.Decode(bytes);
if (dict.ContainsKey("added"))
{
var trackerList = (BList)dict["added"];
foreach (var tracker in trackerList)
{
TrackerAdded?.Invoke(peerWireClient, this, tracker.ToString());
}
}
}
public static Torrent ReadTorrent(string filename)
{
// Читаем файл торрента и берем необходимый словарь info
List <LostFile> files = new List <LostFile>();
BDict torrent = (BDict)BencodingUtils.DecodeFile(filename, Encoding.UTF8);
BDict fileInfo = (BDict)torrent["info"];
string name = ((BString)fileInfo["name"]).Value;
int pieceLength = (int)((BInt)fileInfo["piece length"]).Value;
// Перечитываем торрент еще раз, чтобы взять хеш в нужном виде
torrent = (BDict)BencodingUtils.DecodeFile(filename, Encoding.GetEncoding(437));
char[] pieces = ((BString)((BDict)torrent["info"])["pieces"]).Value.ToCharArray();
if (fileInfo.ContainsKey("files")) // Multifile torrent
{
BList filesData = (BList)fileInfo["files"];
long begin = 0;
foreach (BDict file in filesData)
{
BList filePaths = (BList)file["path"];
long length = ((BInt)file["length"]).Value;
string fullPath = name;
foreach (BString partOfPath in filePaths)
{
fullPath += @"\" + partOfPath.Value;
}
files.Add(new LostFile(fullPath, length, begin));
begin += length;
}
}
else // Singlefile torrent
{
long Length = ((BInt)fileInfo["length"]).Value;
files.Add(new LostFile(name, Length, 0));
}
return(new Torrent(name, files, pieceLength, pieces, filename));
}
public AnnounceInfo Announce(string url, string hash, string peerId, long bytesDownloaded, long bytesLeft, long bytesUploaded,
int eventTypeFilter, int ipAddress, int numWant, int listenPort, int extensions)
{
byte[] hashBytes = Pack.Hex(hash);
byte[] peerIdBytes = Encoding.ASCII.GetBytes(peerId);
String realUrl = url.Replace("scrape", "announce") + "?";
String hashEncoded = "";
foreach (byte b in hashBytes)
{
hashEncoded += String.Format("%{0:X2}", b);
}
String peerIdEncoded = "";
foreach (byte b in peerIdBytes)
{
peerIdEncoded += String.Format("%{0:X2}", b);
}
realUrl += "info_hash=" + hashEncoded;
realUrl += "&peer_id=" + peerIdEncoded;
realUrl += "&port=" + listenPort;
realUrl += "&uploaded=" + bytesUploaded;
realUrl += "&downloaded=" + bytesDownloaded;
realUrl += "&left=" + bytesLeft;
realUrl += "&event=started";
realUrl += "&compact=1";
HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(realUrl);
webRequest.Accept = "*/*";
webRequest.UserAgent = "System.Net.Torrent";
HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse();
Stream stream = webResponse.GetResponseStream();
if (stream == null)
{
return(null);
}
BinaryReader binaryReader = new BinaryReader(stream);
byte[] bytes = new byte[0];
while (true)
{
try
{
byte[] b = new byte[1];
b[0] = binaryReader.ReadByte();
bytes = bytes.Concat(b).ToArray();
}
catch (Exception)
{
break;
}
}
BDict decoded = (BDict)BencodingUtils.Decode(bytes);
if (decoded.Count == 0)
{
return(null);
}
if (!decoded.ContainsKey("peers"))
{
return(null);
}
if (!(decoded["peers"] is BString))
{
throw new NotSupportedException("Dictionary based peers not supported");
}
Int32 waitTime = 0;
Int32 seeders = 0;
Int32 leachers = 0;
if (decoded.ContainsKey("interval"))
{
waitTime = (BInt)decoded["interval"];
}
if (decoded.ContainsKey("complete"))
{
seeders = (BInt)decoded["complete"];
}
if (decoded.ContainsKey("incomplete"))
{
leachers = (BInt)decoded["incomplete"];
}
BString peerBinary = (BString)decoded["peers"];
return(new AnnounceInfo(GetPeers(peerBinary.ByteValue), waitTime, seeders, leachers));
}
public IDictionary <string, ScrapeInfo> Scrape(string url, string[] hashes)
{
Dictionary <String, ScrapeInfo> returnVal = new Dictionary <string, ScrapeInfo>();
String realUrl = url.Replace("announce", "scrape") + "?";
String hashEncoded = "";
foreach (String hash in hashes)
{
byte[] hashBytes = Pack.Hex(hash);
hashEncoded = hashBytes.Aggregate(hashEncoded, (current, b) => current + String.Format("%{0:X2}", b));
realUrl += "info_hash=" + hashEncoded + "&";
}
HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(realUrl);
webRequest.Accept = "*/*";
webRequest.UserAgent = "System.Net.Torrent";
webRequest.Timeout = this.Timeout * 1000;
HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse();
Stream stream = webResponse.GetResponseStream();
if (stream == null)
{
return(null);
}
BinaryReader binaryReader = new BinaryReader(stream);
byte[] bytes = new byte[0];
while (true)
{
try
{
byte[] b = new byte[1];
b[0] = binaryReader.ReadByte();
bytes = bytes.Concat(b).ToArray();
}
catch (Exception)
{
break;
}
}
BDict decoded = (BDict)BencodingUtils.Decode(bytes);
if (decoded.Count == 0)
{
return(null);
}
if (!decoded.ContainsKey("files"))
{
return(null);
}
BDict bDecoded = (BDict)decoded["files"];
foreach (String k in bDecoded.Keys)
{
BDict d = (BDict)bDecoded[k];
if (d.ContainsKey("complete") && d.ContainsKey("downloaded") && d.ContainsKey("incomplete"))
{
String rk = Unpack.Hex(BencodingUtils.ExtendedASCIIEncoding.GetBytes(k));
returnVal.Add(rk, new ScrapeInfo((uint)((BInt)d["complete"]).Value, (uint)((BInt)d["downloaded"]).Value, (uint)((BInt)d["incomplete"]).Value, ScraperType.HTTP));
}
}
return(returnVal);
}
/// <summary>
/// Background thread handling all incoming traffic
/// </summary>
private void ReceivePackets()
{
while (true)
{
try
{
// Get a datagram
receiveFrom = new IPEndPoint(IPAddress.Any, localPort);
byte[] data = udpClient.Receive(ref receiveFrom);
// Decode the message
Stream stream = new MemoryStream(data);
IBencodingType receivedMsg = BencodingUtils.Decode(stream);
string decoded = BencodingUtils.ExtendedASCIIEncoding.GetString(data.ToArray());
Log("Received message!");
//Log(decoded);
// t is transaction id : todo: check, since ports are reused
// y is e for error, r for reply, q for query
if (receivedMsg is BDict) // throws error.. todo: fix
{
BDict dictMsg = (BDict)receivedMsg;
if (dictMsg.ContainsKey("y"))
{
if (dictMsg["y"].Equals(new BString("e")))
{
// received error
Log("Received error! (ignored)");
}
else if (dictMsg["y"].Equals(new BString("r")))
{
// received reply
if (dictMsg.ContainsKey("r"))
{
if (dictMsg["r"] is BDict)
{
BDict dictMsg2 = (BDict)dictMsg["r"];
if (dictMsg2.ContainsKey("values") && dictMsg.ContainsKey("t"))
{
Log("Received list of peers for torrent!");
countRecvPeerPackets++;
BList peerAdrs = (BList)dictMsg2["values"];
UpdateTorrentPeerList(peerAdrs, (BString)dictMsg["t"]);
}
else if (dictMsg2.ContainsKey("nodes") && dictMsg.ContainsKey("t"))
{
// could be an answer to find node or get peers
Log("Received list of nodeID & IP & port!");
countRecvNodePackets++;
BString nodeIDString = (BString)dictMsg2["nodes"];
UpdateContactList(nodeIDString, (BString)dictMsg["t"]);
}
else
{
}
}
else
{
}
}
}
else if (dictMsg["y"].Equals(new BString("q")))
{
// received query
Log("Received query! (ignored)");
}
}
}
}
catch (Exception ex)
{
Log("Error receiving data: " + ex.ToString());
}
}
}
/// <summary>
/// Background thread handling all incoming traffic
/// </summary>
private void ReceivePackets()
{
while (true)
{
try
{
// Get a datagram
receiveFrom = new IPEndPoint(IPAddress.Any, localPort);
// Stopwatch sw = new Stopwatch();
// sw.Start();
byte[] data = udpClientReceive.Receive(ref receiveFrom);
//if (sw.ElapsedMilliseconds > 10) { Console.WriteLine(sw.ElapsedMilliseconds); }
//sw.Stop();
// Decode the message
Stream stream = new MemoryStream(data);
IBencodingType receivedMsg = BencodingUtils.Decode(stream);
string decoded = BencodingUtils.ExtendedASCIIEncoding.GetString(data.ToArray());
//Log("Received message!");
// t is transaction id
// y is e for error, r for reply, q for query
if (receivedMsg is BDict) // throws error.. todo: fix
{
BDict dictMsg = (BDict)receivedMsg;
if (dictMsg.ContainsKey("y"))
{
if (dictMsg["y"].Equals(new BString("e")))
{
//Log("Received error! (ignored)");
}
else if (dictMsg["y"].Equals(new BString("r")))
{
// received reply
if (dictMsg.ContainsKey("r"))
{
if (dictMsg["r"] is BDict)
{
BDict dictMsg2 = (BDict)dictMsg["r"];
if (dictMsg2.ContainsKey("values"))
{
//Log("Received list of peers for torrent!");
countRecvPeerPackets++;
}
else if (dictMsg2.ContainsKey("nodes"))
{
// could be an answer to find node or get peers
//Log("Received list of nodeID & IP & port!");
countRecvNodePackets++;
BString nodeIDString = (BString)dictMsg2["nodes"];
UpdateContactList(nodeIDString);
}
else
{
// no values and no nodes, assuming its a ping,
// at least some form of response
}
}
else
{
}
}
}
else if (dictMsg["y"].Equals(new BString("q")))
{
// received query
countRecvQuery++;
//Log("Received query! (ignored)");
}
}
}
}
catch (Exception ex)
{
//Log("Error receiving data: " + ex.ToString());
}
}
}
public bool Load(Stream stream)
{
_root = BencodingUtils.Decode(stream);
if (_root == null)
{
return(false);
}
BDict dictRoot = (_root as BDict);
if (dictRoot == null)
{
return(false);
}
if (dictRoot.ContainsKey("announce"))
{
Announce = (BString)dictRoot["announce"];
}
if (dictRoot.ContainsKey("announce-list"))
{
BList announceList = (BList)dictRoot["announce-list"];
foreach (IBencodingType type in announceList)
{
if (type is BString)
{
AnnounceList.Add(type as BString);
}
else
{
BList list = type as BList;
if (list == null)
{
continue;
}
BList listType = list;
foreach (IBencodingType bencodingType in listType)
{
BString s = (BString)bencodingType;
AnnounceList.Add(s);
}
}
}
}
if (dictRoot.ContainsKey("comment"))
{
Comment = (BString)dictRoot["comment"];
}
if (dictRoot.ContainsKey("created by"))
{
CreatedBy = (BString)dictRoot["created by"];
}
if (dictRoot.ContainsKey("creation date"))
{
long ts = (BInt)dictRoot["creation date"];
CreationDate = new DateTime(1970, 1, 1).AddSeconds(ts);
}
if (dictRoot.ContainsKey("info"))
{
BDict infoDict = (BDict)dictRoot["info"];
using (SHA1Managed sha1 = new SHA1Managed())
{
byte[] str = BencodingUtils.EncodeBytes(infoDict);
Hash = sha1.ComputeHash(str);
}
if (infoDict.ContainsKey("files"))
{
//multi file mode
BList fileList = (BList)infoDict["files"];
foreach (IBencodingType bencodingType in fileList)
{
BDict fileDict = (BDict)bencodingType;
String filename = string.Empty;
Int64 filesize = default(Int64);
if (fileDict.ContainsKey("path"))
{
BList filenameList = (BList)fileDict["path"];
foreach (IBencodingType type in filenameList)
{
filename += (BString)type;
filename += "\\";
}
filename = filename.Trim('\\');
}
if (fileDict.ContainsKey("length"))
{
filesize = (BInt)fileDict["length"];
}
Files.Add(filename, filesize);
}
}
if (infoDict.ContainsKey("name"))
{
Name = (BString)infoDict["name"];
if (Files.Count == 0 && infoDict.ContainsKey("length"))
{
Files.Add(Name, (BInt)infoDict["length"]);
}
}
if (infoDict.ContainsKey("private"))
{
BInt isPrivate = (BInt)infoDict["private"];
Private = isPrivate != 0;
}
if (infoDict.ContainsKey("pieces"))
{
BString pieces = (BString)infoDict["pieces"];
for (int x = 0; x < pieces.ByteValue.Length; x += 20)
{
byte[] hash = pieces.ByteValue.GetBytes(x, 20);
PieceHashes.Add(hash);
}
}
if (infoDict.ContainsKey("piece length"))
{
PieceSize = (BInt)infoDict["piece length"];
}
}
return(true);
}
