public static Metainfo FromBytes(byte[] bytes)
{
BencodedValue decoded = Bencoder.Decode(bytes);
Metainfo metainfo = DecodeMetainfo(decoded);
return(metainfo);
}
private static void Handle(FileHash hash, PeerHash peer, byte[] payload, Action <FileHash, PeerHash, NetworkAddress[]> callback)
{
BencodedValue value = Bencoder.Decode(payload);
byte[] added = value.Find("added", x => x?.Data?.GetBytes());
List <NetworkAddress> peers = new List <NetworkAddress>();
if (added != null)
{
for (int i = 0; i < added.Length; i += 6)
{
string host = GetHost(added, i);
int port = GetPort(added, i);
if (port > 0)
{
peers.Add(new NetworkAddress(host, port));
}
}
}
if (added?.Length > 0)
{
callback(hash, peer, peers.ToArray());
}
}
public static BencodedValue GetBencoded(this NetworkIncomingMessage incoming)
{
byte[] binary = incoming.ToBytes(6);
BencodedValue bencoded = Bencoder.Decode(binary);
return(bencoded);
}
public Metainfo ToMetainfo(out byte[] bytes)
{
BencodedValue entries = Build();
bytes = Bencoder.Encode(entries);
return(MetainfoFactory.FromBytes(bytes));
}
public void OnMessageSent(FileHash hash, PeerHash peer, byte[] payload)
{
BencodedValue bencoded = Bencoder.Decode(payload);
int? message = bencoded.Find("msg_type", x => x?.ToInt32());
int? piece = bencoded.Find("piece", x => x?.ToInt32());
int? size = bencoded.Find("total_size", x => x?.ToInt32());
if (message == 0 && piece != null)
{
hooks.CallMetadataRequestSent(hash, peer, piece.Value);
}
if (message == 1 && size != null)
{
hooks.CallMetadataMeasured(hash, peer, size.Value);
}
if (message == 1 && piece != null)
{
byte[] content = Bytes.Copy(payload, bencoded.Data.Length);
hooks.MetadataPieceSent(hash, peer, piece.Value, content);
}
if (message == 2 && piece != null)
{
hooks.CallMetadataRejectSent(hash, peer, piece.Value);
}
}
public static void SendMetadataRequest(this CoordinatorService glue, PeerHash peer, int piece)
{
BencodedValue bencoded = new BencodedValue
{
Dictionary = new[]
{
new BencodedEntry
{
Key = new BencodedValue {
Text = new BencodedText("msg_type")
},
Value = new BencodedValue {
Number = new BencodedNumber(0)
}
},
new BencodedEntry
{
Key = new BencodedValue {
Text = new BencodedText("piece")
},
Value = new BencodedValue {
Number = new BencodedNumber(piece)
}
}
}
};
glue.SendExtension(peer, MetadataPlugin.Name, Bencoder.Encode(bencoded));
}
private void SerializeDRecord(Bencoder e, DRecord rec)
{
e.StartDRecord();
foreach (var kvp in rec.Values)
{
e.ByteString(TextEncoding.GetBytes(kvp.Key));
if (kvp.Value is DNumber)
{
SerializeDNumber(e, (DNumber)kvp.Value);
}
else if (kvp.Value is DString)
{
SerializeDString(e, (DString)kvp.Value);
}
else /* kvp.Value is DRecord */
{
Debug.Assert(kvp.Value is DRecord);
SerializeDRecord(e, (DRecord)kvp.Value);
}
}
e.FinishDRecord();
}
public void ExtractInfoHash()
{
Bencoder bc = new Bencoder();
MnlMessage msg = new MnlMessage
.Builder(ParseTest.ConvertHexStringToByteArray("64313a6164323a696432303a7200ee612a3d17f22d721a8019317eb27c7039c9393a696e666f5f6861736832303af6ef92f7cfa792c050fef70c405ded104771553d363a6e6f7365656469316565313a71393a6765745f7065657273313a74343a9b9427a4313a76343a5554ab14313a79313a7165"))
.Build();
MnlMessage myMsg = new MnlMessage
.Builder(ParseTest.ConvertHexStringToByteArray("64313a74323a3032313a79313a71313a71393a6765745f7065657273313a6164323a696432303a09dc0cea8478d7f285ef674c6a2f931ae3b603f4393a696e666f5f6861736832303a3f4f40163040223f3f063f3a562f603e3f543f3f6565"))
.Build();
Dictionary <string, object> decoded = (Dictionary <string, object>)bc.DecodeElement(ParseTest.ConvertHexStringToByteArray("64313a6164323a696432303ab2dfb21aa9b31c00cdca99bcd9232a7facbc76e2393a696e666f5f6861736832303aa44f7b0766a4e53ebfc0cf79fa9c82778b88d94765313a71393a6765745f7065657273313a74343a67707588313a79313a7165"));
Dictionary <string, object> decodedMy = (Dictionary <string, object>)bc.DecodeElement(ParseTest.ConvertHexStringToByteArray("64313a74323a3034313a79313a71313a71393a6765745f7065657273313a6164323a696432303ae36f5d8ef6928691d9696e02d025e3b8f1a08ca2393a696e666f5f6861736832303a139f69de76a07790ec3ad31cbc3bd5d9058716006565"));
var infoHash = Encoding.UTF8.GetBytes((string)((Dictionary <string, object>)decoded["a"])["info_hash"]);
var bytes = ParseTest.ConvertHexStringToByteArray("3F4F40163040223F3F063F3A562F603E3F543F3F");
//CollectionAssert.AreEqual(infoHash, bytes);
SoapHexBinary hex = new SoapHexBinary(infoHash);
Debug.WriteLine($"Info hash: {hex.ToString()} ");
}
public Builder(byte[] msg)
{
Bencoder bencoder = new Bencoder();
var decodedMsg = bencoder.DecodeElement(msg);
Dictionary <string, object> msgFields = (Dictionary <string, object>)decodedMsg;
_msg = new MnlMessage();
try {
_msg.TranId = Bencoder.DefEncoding.GetString((byte[])msgFields["t"]);
} catch (KeyNotFoundException) {
throw new MalformedPacketException("t");
}
try {
_msg.Type = (MessageType)(Bencoder.DefEncoding.GetString((byte[])msgFields["y"])[0]);
} catch (KeyNotFoundException) {
throw new MalformedPacketException("y");
}
if (msgFields.ContainsKey("q"))
{
_msg.QueryType = Bencoder.DefEncoding.GetString((byte[])msgFields["q"]);
}
switch (_msg.Type)
{
case MessageType.Query:
try {
_msg.Payload = (Dictionary <string, object>)msgFields["a"];
} catch (KeyNotFoundException) {
throw new MalformedPacketException("a");
}
break;
case MessageType.Response:
try {
_msg.Payload = (Dictionary <string, object>)msgFields["r"];
} catch (KeyNotFoundException) {
throw new MalformedPacketException("r");
}
break;
case MessageType.Error:
try {
List <object> errList = (List <object>)msgFields["e"];
int codeIdx = errList[0] is int? 0 : 1;
_msg.ErrorCode = (ErrorType)errList[codeIdx];
if (errList.Count > 1)
{
_msg.ErrorMessage = Bencoder.DefEncoding.GetString((byte[])errList[codeIdx == 0 ? 1 : 0]); //TODO: ???
}
} catch (KeyNotFoundException) {
throw new MalformedPacketException("e");
}
return;
}
_msg.OriginatorId = new Id((byte[])_msg.Payload["id"]);
}
public byte[] ToBytes()
{
BencodedValue entries = Build();
byte[] bytes = Bencoder.Encode(entries);
return(bytes);
}
public Extended GetHandshake()
{
BencodedValue encoded = more.Encode(metadata?.Size);
byte[] binary = Bencoder.Encode(encoded);
return(new Extended(0, binary));
}
public void ShouldDecodeAsInteger()
{
byte[] data = Encoding.ASCII.GetBytes("i10e");
BencodedValue value = Bencoder.Decode(data);
value.Should().NotBeNull();
value.Number.Should().NotBeNull();
value.Number.ToInt32().Should().Be(10);
}
public void OnHandshake(FileHash hash, PeerHash peer, byte[] payload)
{
BencodedValue bencoded = Bencoder.Decode(payload);
int? size = bencoded.Find("metadata_size", x => x?.ToInt32());
if (size != null)
{
hooks.CallMetadataMeasured(hash, peer, size.Value);
}
}
public void ParseFindNode()
{
string findNodeMsg = "64313a6164323a696432303a5fa2a8ea6689e6beaa61b93196b10f4404dac592363a74617267657432303a5fa2a8ea6689e6beaa61b93196b10f4404dac59265313a71393a66696e645f6e6f6465313a74323aaf9e313a76343a4c540100313a79313a7165";
Bencoder bc = new Bencoder();
byte[] msgAsBytes = ConvertHexStringToByteArray(findNodeMsg);
string asciiMsg = Encoding.ASCII.GetString(msgAsBytes);
Dictionary <string, object> fields = (Dictionary <string, object>)bc.DecodeElement(msgAsBytes);
}
public FileHash ToHash()
{
BencodedValue entries = Build();
byte[] bytes = Bencoder.Encode(entries);
Metainfo metainfo = MetainfoFactory.FromBytes(bytes);
FileHash hash = metainfo.Hash;
return(hash);
}
public void ParsePing()
{
string pingMsg = "64313a6164323a696432303a5fa2a2809655927cbbe6fdab912c88e59a4630b065313a71343a70696e67313a74323a0136313a76343a4c540101313a79313a7165";
string unicodePingMsg = Encoding.ASCII.GetString(ConvertHexStringToByteArray(pingMsg));
string myPingMsg = "64313a74323a3032313a79313a71313a71343a70696e67313a6164323a696432303aefbfbd55efbfbd4a43efbfbd23efbfbdefbfbd20efbfbdefbfbdefbfbdefbfbd113738efbfbdefbfbd176565";
string unicodeMyPingMsg = Encoding.ASCII.GetString(ConvertHexStringToByteArray(myPingMsg));
Bencoder bc = new Bencoder();
Dictionary <string, object> fields = (Dictionary <string, object>)bc.DecodeElement(ConvertHexStringToByteArray(pingMsg));
Dictionary <string, object> myfields = (Dictionary <string, object>)bc.DecodeElement(ConvertHexStringToByteArray(myPingMsg));
int boop = 1;
}
public static MetainfoFile FromFile(string path)
{
byte[] bytes = File.ReadAllBytes(path);
BencodedValue decoded = Bencoder.Decode(bytes);
BencodedValue info = decoded.Find("info", x => x);
Metainfo metainfo = DecodeMetainfo(info);
string[] trackers = FindTrackers(decoded);
return(new MetainfoFile(metainfo, trackers));
}
public Metainfo(byte[] data, Encoding encoding)
{
_defaultEncoding = encoding;
_bencoder = Bencoder.Build();
var metainfoDict = _bencoder.Decode(data);
var infoDict = metainfoDict[InfoDictionaryKey];
PieceLength = infoDict[PieceLengthKey];
// ReSharper disable once PossibleLossOfFraction
PiecesHash = infoDict[PiecesKey];
InfoHash = CalcInfoHashBytes(infoDict);
Announces = GetAnnounces(metainfoDict);
Files = GetFiles(infoDict);
TotalLength = CalcTotalLength(Files);
PiecesCount = (int)Math.Ceiling((double)(TotalLength / PieceLength)) + 1;
}
/// <summary>
/// Requests peer and other info from tracker
/// </summary>
/// <param name="evnt">Client event</param>
/// <param name="compact">Whether tracker response should be compact</param>
/// <returns>Tracker response</returns>
private Dictionary <string, object> QueryTracker(ClientEvent evnt = ClientEvent.None, bool compact = true)
{
BtClientStats clientStats = Client.GetStats();
NameValueCollection httpRqArgs = new NameValueCollection();
httpRqArgs.Add("info_hash", HttpUtility.UrlEncode(Client.GetInfoHash()));
httpRqArgs.Add("peer_id", HttpUtility.UrlEncode(Client.GetPeerID()));
httpRqArgs.Add("uploaded", clientStats.Uploaded.ToString());
httpRqArgs.Add("downloaded", clientStats.Downloaded.ToString());
httpRqArgs.Add("left", clientStats.Left.ToString());
httpRqArgs.Add("compact", compact ? "1" : "0");
httpRqArgs.Add("event", evnt.ToString());
if (_trackerId != null)
{
httpRqArgs.Add("trackerid", _trackerId);
}
if (_key != null)
{
httpRqArgs.Add("key", _key);
}
string rqUrl = Url + ToQueryString(httpRqArgs);
Debug.WriteLine($"Tracker request: {rqUrl}");
HttpWebRequest httpRq = (HttpWebRequest)WebRequest.Create(rqUrl);
httpRq.UserAgent = UserAgent;
HttpWebResponse httpRs = (HttpWebResponse)httpRq.GetResponse();
if (httpRs.StatusCode == HttpStatusCode.OK)
{
MemoryStream httpRsStream = new MemoryStream(httpRs.ContentLength != -1 ? (int)httpRs.ContentLength : 0);
httpRs.GetResponseStream()?.CopyTo(httpRsStream);
return((Dictionary <string, object>)Bencoder.DecodeElement(httpRsStream.ToArray()));
}
return(null);
}
private void ListenResponses()
{
new Thread(() => {
Bencoder bencoder = new Bencoder();
while (!_myCancelTokenSrc.IsCancellationRequested)
{
int len = ParseInt(ReadMsgSync(4));
byte[] incMsg = ReadMsgSync(len);
var decoded = (Dictionary <string, object>)bencoder.DecodeElement(incMsg);
string action = (string)decoded["action"];
switch (action)
{
case "sysout":
_myPool.Add(new Peer(IPAddress.Parse((string)decoded["ip"]), int.Parse((string)decoded["port"])));
break;
}
}
}).Start();
}
public static void SendPeers(this CoordinatorService glue, PeerHash peer, params NetworkAddress[] remotes)
{
BencodedValue bencoded = new BencodedValue
{
Dictionary = new[]
{
new BencodedEntry
{
Key = new BencodedValue {
Text = new BencodedText("added")
},
Value = new BencodedValue {
Data = ToData(remotes)
}
}
}
};
glue.SendExtension(peer, PeersPlugin.Name, Bencoder.Encode(bencoded));
}
public static void SendMetadataPiece(this CoordinatorService glue, PeerHash peer, int piece, int total, byte[] data)
{
BencodedValue bencoded = new BencodedValue
{
Dictionary = new[]
{
new BencodedEntry
{
Key = new BencodedValue {
Text = new BencodedText("msg_type")
},
Value = new BencodedValue {
Number = new BencodedNumber(1)
}
},
new BencodedEntry
{
Key = new BencodedValue {
Text = new BencodedText("piece")
},
Value = new BencodedValue {
Number = new BencodedNumber(piece)
}
},
new BencodedEntry
{
Key = new BencodedValue {
Text = new BencodedText("total_size")
},
Value = new BencodedValue {
Number = new BencodedNumber(total)
}
}
}
};
byte[] payload = Bencoder.Encode(bencoded);
Bytes.Append(ref payload, data);
glue.SendExtension(peer, MetadataPlugin.Name, payload);
}
public Metainfo(byte[] data, Encoding encoding)
{
Protocol = encoding.GetBytes("BitTorrent protocol");
_encoding = encoding;
_bencoder = new Bencoder();
var metainfoDict = (Dictionary <string, object>)_bencoder.DecodeElement(data);
var infoDict = (Dictionary <string, object>)metainfoDict[InfoDictionaryKey];
PieceLength = (int)infoDict[PieceLengthKey];
PiecesHash = (byte[])infoDict[PiecesKey];
InfoHash = CalcInfoHashBytes(infoDict);
Nodes = GetNodes(metainfoDict);
Announces = GetAnnounces(metainfoDict);
if (metainfoDict.ContainsKey(AnnounceKey))
{
Announces.Add(_bencoder.Encoding.GetString((byte[])metainfoDict[AnnounceKey]));
}
Files = GetFiles(infoDict);
TotalLength = CalcTotalLength(Files);
PiecesCount = (int)Math.Ceiling((double)(TotalLength / PieceLength));
}
private void InvokeGetPeers(byte[] infohash, bool fast, bool nocache)
{
lock (__peersSearchLck) {
Dictionary <string, Object> argsDict = new Dictionary <string, object>();
List <Object> args = new List <Object> {
GETPEERS_KEY, new System.Runtime.Remoting.Metadata.W3cXsd2001.SoapHexBinary(infohash).ToString()
};
if (fast)
{
args.Add("-fast");
}
if (nocache)
{
args.Add("-nocache");
}
argsDict["arguments"] = args;
argsDict["cwd"] = ".";
Bencoder beEncoder = new Bencoder();
byte[] bencodedArgs = beEncoder.EncodeElement(argsDict);
while (!_myCancelTokenSrc.IsCancellationRequested)
{
try {
_extMnlClientStream.Write(GetInt(bencodedArgs.Length), 0, 4);
_extMnlClientStream.Write(bencodedArgs, 0, bencodedArgs.Length);
_extMnlClientStream.Flush();
} catch (SocketException se) {
Debug.WriteLine($"Can't connect to remote table {se}, waiting 10 secs and trying once more");
Thread.Sleep(10000);
continue;
}
break;
}
}
}
private void AssertEncodesTo(Action<Bencoder> encodingSteps, string expected)
{
byte[] expectedBytes = Encoding.ASCII.GetBytes(expected);
Bencoder e = new Bencoder();
encodingSteps.Invoke(e);
byte[] actualBytes = e.Encoded;
Utils.AssertBytewiseIdentical(expectedBytes, actualBytes);
}
public void TestEncodeEmpty()
{
Bencoder e = new Bencoder();
Assert.AreEqual(e.Encoded.Length, 0);
}
private TcpSocketReceiveCallback OnReceived(TrackerGetHttpEntry entry)
{
return(received =>
{
if (received.Status == SocketStatus.OK)
{
context.Queue.Add(() =>
{
byte[] data = Bytes.Copy(entry.Buffer.Data, entry.Buffer.Offset, received.Count);
string text = Encoding.ASCII.GetString(data);
context.CallPacketReceived(entry.Endpoint, data.Length);
if (text.StartsWith(TrackerGetHttpProtocol.ResponseHeader) == false)
{
context.CallPacketIgnored(entry.Endpoint, data.Length);
return;
}
int counter = 0, position = 0;
bool r = false, n = false;
for (int i = 0; i < data.Length; i++)
{
if (data[i] == '\r')
{
r = true;
counter++;
continue;
}
if (data[i] == '\n')
{
n = true;
counter++;
continue;
}
if (counter == 4 && r && n)
{
position = i;
break;
}
if (counter == 2 && !(r && n))
{
position = i;
break;
}
counter = 0;
}
if (position == 0)
{
context.CallPacketIgnored(entry.Endpoint, data.Length);
return;
}
BencodedValue decoded = Bencoder.Decode(data, position);
if (decoded.Dictionary == null)
{
context.CallPacketIgnored(entry.Endpoint, data.Length);
return;
}
string failure = decoded.Find("failure reason", x => x?.Text?.GetString());
if (failure != null)
{
context.CallFailed(entry.Address, entry.Request.Hash, failure);
return;
}
int?interval = decoded.Find("interval", x => x?.ToInt32());
BencodedValue peers = decoded.Find("peers", x => x);
if (interval != null && peers.Text != null && peers.Text.Length % 6 == 0)
{
List <NetworkAddress> result = new List <NetworkAddress>(peers.Text.Length / 6);
byte[] bytes = peers.Data.GetBytes();
for (int i = 0; i < bytes.Length; i += 6)
{
int port = Bytes.ReadUInt16(bytes, i + 4);
StringBuilder address = new StringBuilder();
address.Append(bytes[i].ToString());
address.Append('.');
address.Append(bytes[i + 1].ToString());
address.Append('.');
address.Append(bytes[i + 2].ToString());
address.Append('.');
address.Append(bytes[i + 3].ToString());
if (port > 0)
{
result.Add(new NetworkAddress(address.ToString(), port));
}
}
collection.Remove(entry.Socket);
entry.Callback.Invoke(TimeSpan.FromSeconds(interval.Value));
context.CallAnnounced(entry.Address, entry.Request.Hash, TimeSpan.FromSeconds(interval.Value), result.ToArray());
}
});
}
});
}
public void ParseProblematicMsg()
{
string problematicMsg = "d1:rd2:id20:????g????r =)??HWu5:nodes208:?Jk??\" ??? jm ?? (???[?3????[E?{??ZU ? x??,???????ln?|^L @??cxQkXT/???c??=Z?? 2?U??H??m?*Y?D?? K????????V???('.??= ??B96?????h?S? V?? ??t??????q? j???O? |^?b? p???????????I??";
var decoded = new Bencoder().DecodeElement(Encoding.ASCII.GetBytes(problematicMsg));
}
public void ParseMsgWithProblematicList()
{
byte[] problematicMsg = ParseTest.ConvertHexStringToByteArray("64313A7264323A696432303A30643513245B078D06870AA59DB1F7A21EC41608353A746F6B656E323A6778363A76616C7565736C6565313A74323A4635313A79313A7265");
var decoded = new Bencoder().DecodeElement(problematicMsg);
}
private void SerializeDString(Bencoder e, DString s)
{
e.StartDString().ByteString(TextEncoding.GetBytes(s.Value)).FinishDString();
}
public byte[] Encode(Message msg)
{
Bencoder encoder = new Bencoder();
encoder.StartDictionary();
encoder.ByteString(TextEncoding.GetBytes(SequenceNumberFieldName))
.Integer(msg.SequenceNumber)
.ByteString(TextEncoding.GetBytes(AckNumberFieldName))
.Integer(msg.AckNumber)
.ByteString(TextEncoding.GetBytes(OpCodeFieldName))
.Integer((long)msg.OpCode);
foreach (string k in msg.Attributes.Keys)
{
encoder.ByteString(TextEncoding.GetBytes(k));
object value = msg.Attributes[k];
if (typeof(long).IsAssignableFrom(value.GetType()))
{
encoder.Integer((long)value);
}
else if (value is DNumber)
{
SerializeDNumber(encoder, (DNumber)value);
}
else if (value is string)
{
encoder.ByteString(TextEncoding.GetBytes((string)value));
}
else if (value is DString)
{
SerializeDString(encoder, (DString)value);
}
else if (value is DRecord)
{
SerializeDRecord(encoder, (DRecord)value);
}
else
{
throw new NotImplementedException();
}
}
encoder.FinishDictionary();
return encoder.Encoded;
}
private void SerializeDNumber(Bencoder e, DNumber n)
{
e.StartDNumber().Number(n.Value).FinishDNumber();
}
