public void TestDecode()
{
ShortHeaderPacket shp = new ShortHeaderPacket();
shp.PacketNumber = 42;
shp.DCID = new byte[] { 0x00, 0x00, 0x00, 0x7b };
shp.AddFrame(new DebugFrame {
Message = "Message"
});
byte[] pack = shp.Encode();
Packet p = Packet.Unpack(pack);
Assert.AreEqual(p.GetType(), typeof(ShortHeaderPacket));
ShortHeaderPacket sh = p as ShortHeaderPacket;
CollectionAssert.AreEqual(sh.DCID, new byte[] { 0x00, 0x00, 0x00, 0x7b });
Assert.AreEqual(sh.PacketNumber, (UInt64)42);
Assert.AreEqual(sh.Spin, false);
Assert.AreEqual(sh.KeyPhase, false);
Assert.AreEqual(sh.PacketNumberLength, (UInt32)4);
foreach (Frame f in p.Frames)
{
Assert.AreEqual(f.Type, 0x1e);
DebugFrame fd = f as DebugFrame;
Assert.AreEqual(fd.Message, "Message");
}
}
static void Main(string[] args)
{
byte[] bytes = new VariableInteger(12345);
VariableInteger integer = bytes;
UInt64 uinteger = integer;
int size = VariableInteger.Size(bytes[0]);
InitialPacket packet = new InitialPacket()
{
Version = 16,
SourceConnectionId = 124,
DestinationConnectionId = 0,
PacketNumber = 777521,
TokenLength = 0
};
packet = new PacketCreator().CreateInitialPacket(124, 0);
ConnectionCloseFrame frame = new ConnectionCloseFrame(ErrorCode.SERVER_BUSY, "The server is too busy to process your request.");
MaxStreamIdFrame msidframe = new MaxStreamIdFrame(144123, StreamType.ClientUnidirectional);
//packet.AttachFrame(frame);
packet.AttachFrame(msidframe);
byte[] data = packet.Encode();
string b64 = ToBase64(data);
byte[] shpdata1 = new byte[] { 1, 1, 2, 3, 5, 8 };
byte[] shpdata2 = new byte[] { 13, 21, 34, 55, 89, 144 };
ShortHeaderPacket shp = new ShortHeaderPacket();
shp.DestinationConnectionId = 124;
shp.PacketNumber = 2;
shp.AttachFrame(new StreamFrame()
{
StreamId = 1, Length = new VariableInteger((UInt64)shpdata2.Length), StreamData = shpdata2, Offset = 6, EndOfStream = true
});
shp.AttachFrame(new StreamFrame()
{
StreamId = 1, Length = new VariableInteger((UInt64)shpdata1.Length), StreamData = shpdata1, Offset = 0
});
string shpb64 = ToBase64(shp.Encode());
packet.Decode(data);
byte[] ccfData = frame.Encode();
frame.Decode(new ByteArray(ccfData));
byte[] streamIdData = new StreamId(123, StreamType.ClientUnidirectional);
StreamId streamId = streamIdData;
QuicListener listener = new QuicListener(11000);
listener.OnClientConnected += Listener_OnClientConnected;
listener.Start();
}
public ShortHeaderPacket CreateDataPacket(UInt64 streamId, byte[] data)
{
ShortHeaderPacket packet = new ShortHeaderPacket();
packet.PacketNumber = _ns.Get();
packet.DestinationConnectionId = (byte)_peerConnectionId;
packet.AttachFrame(new StreamFrame(streamId, data, 0, true));
return(packet);
}
public ShortHeaderPacket CreateConnectionClosePacket(ErrorCode code, string reason)
{
ShortHeaderPacket packet = new ShortHeaderPacket();
packet.PacketNumber = _ns.Get();
packet.DestinationConnectionId = (byte)_peerConnectionId;
packet.AttachFrame(new ConnectionCloseFrame(code, reason));
return(packet);
}
public ShortHeaderPacket CreateDataPacket(UInt64 streamId, byte[] data, UInt64 offset, bool eos)
{
ShortHeaderPacket packet = new ShortHeaderPacket(_peerConnectionId.Size);
packet.PacketNumber = _ns.Get();
packet.DestinationConnectionId = (byte)_peerConnectionId;
packet.AttachFrame(new StreamFrame(streamId, data, offset, eos));
return(packet);
}
public ShortHeaderPacket CreateDataPacket(ulong streamId, byte[] data)
{
var packet = new ShortHeaderPacket
{
PacketNumber = _ns.Get(), DestinationConnectionId = (byte)_peerConnectionId
};
packet.AttachFrame(new StreamFrame(streamId, data, 0, true));
return(packet);
}
private void ProcessShortHeaderPacket(Packet packet)
{
ShortHeaderPacket shp = (ShortHeaderPacket)packet;
QuicConnection connection = ConnectionPool.Find(shp.DestinationConnectionId);
if (connection == null)
{
return; // TODO: Figure out if the packet should be discarded in that case?
}
connection.ProcessFrames(shp.GetFrames());
}
public void TestEncode()
{
ShortHeaderPacket shp = new ShortHeaderPacket();
shp.PacketNumber = 42;
shp.DCID = new byte[] { 0x00, 0x00, 0x00, 0x7b };
shp.AddFrame(new DebugFrame {
Message = "Message"
});
byte[] pack = shp.Encode();
/*
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| 0 | 1 | S | R | R | K | P P |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Destination Connection ID(0..160) ...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Packet Number(8 / 16 / 24 / 32)...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Protected Payload(*)...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
Assert.AreEqual(pack.Length, 17);
Assert.AreEqual(pack[0] & 0x80, 0); // First bit
Assert.AreEqual(pack[0] & 0x40, 0x40); // Second bit
Assert.AreEqual(pack[0] & 0x20, 0);
Assert.AreEqual(pack[0] & 0x04, 0);
Assert.AreEqual(pack[0] & 0x02, 0x02);
Assert.AreEqual(pack[0] & 0x01, 0x01);
Assert.AreEqual(pack[1], 0);
Assert.AreEqual(pack[2], 0);
Assert.AreEqual(pack[3], 0);
Assert.AreEqual(pack[4], 0x7b);
Assert.AreEqual(pack[5], 0);
Assert.AreEqual(pack[6], 0);
Assert.AreEqual(pack[7], 0);
Assert.AreEqual(pack[8], 42);
// Payload
Assert.AreEqual(pack[9], 0x1e); // Type Debug
Assert.AreEqual(pack[10], Convert.ToByte('M'));
Assert.AreEqual(pack[11], Convert.ToByte('e'));
Assert.AreEqual(pack[12], Convert.ToByte('s'));
Assert.AreEqual(pack[13], Convert.ToByte('s'));
Assert.AreEqual(pack[14], Convert.ToByte('a'));
Assert.AreEqual(pack[15], Convert.ToByte('g'));
Assert.AreEqual(pack[16], Convert.ToByte('e'));
}
/// <summary>
/// Processes short header packet, by distributing the frames towards connections.
/// </summary>
/// <param name="packet"></param>
private void ProcessShortHeaderPacket(Packet packet)
{
ShortHeaderPacket shp = (ShortHeaderPacket)packet;
QuicConnection connection = ConnectionPool.Find(shp.DestinationConnectionId);
// No suitable connection found. Discard the packet.
if (connection == null)
{
return;
}
connection.ProcessFrames(shp.GetFrames());
}
public void ProcessData(StreamFrame frame)
{
// Do not accept data if the stream is reset.
if (State == StreamState.ResetRecvd)
{
return;
}
byte[] data = frame.StreamData;
if (frame.Offset != null)
{
_data.Add(frame.Offset.Value, frame.StreamData);
}
else
{
// TODO: Careful with duplicate 0 offset packets on the same stream. Probably PROTOCOL_VIOLATION?
_data.Add(0, frame.StreamData);
}
// Either this frame marks the end of the stream,
// or fin frame came before the data frames
if (frame.EndOfStream)
{
State = StreamState.SizeKnown;
}
_currentTransferRate += (UInt64)data.Length;
// Terminate connection if maximum stream data is reached
if (_currentTransferRate >= _maximumStreamData)
{
ShortHeaderPacket errorPacket = _connection.PacketCreator.CreateConnectionClosePacket(Infrastructure.ErrorCode.FLOW_CONTROL_ERROR, frame.ActualType, ErrorConstants.MaxDataTransfer);
_connection.SendData(errorPacket);
_connection.TerminateConnection();
return;
}
if (State == StreamState.SizeKnown && IsStreamFull())
{
State = StreamState.DataRecvd;
OnStreamDataReceived?.Invoke(this, Data);
}
}
public bool Send(byte[] data)
{
if (Type == StreamType.ServerUnidirectional)
{
throw new StreamException("Cannot send data on unidirectional stream.");
}
_connection.IncrementRate(data.Length);
ShortHeaderPacket packet = _connection.PacketCreator.CreateDataPacket(this.StreamId.IntegerValue, data);
if (_connection.MaximumReached())
{
packet.AttachFrame(new StreamDataBlockedFrame(StreamId.IntegerValue, (UInt64)data.Length));
}
return(_connection.SendData(packet));
}
public bool Send(byte[] data)
{
if (Type == StreamType.ServerUnidirectional)
{
throw new StreamException("Cannot send data on unidirectional stream.");
}
_connection.IncrementRate(data.Length);
int numberOfPackets = (data.Length / QuicSettings.PMTU) + 1;
int leftoverCarry = data.Length % QuicSettings.PMTU;
for (int i = 0; i < numberOfPackets; i++)
{
bool eos = false;
int dataSize = QuicSettings.PMTU;
if (i == numberOfPackets - 1)
{
eos = true;
dataSize = leftoverCarry;
}
byte[] buffer = new byte[dataSize];
Buffer.BlockCopy(data, (Int32)_sendOffset, buffer, 0, dataSize);
ShortHeaderPacket packet = _connection.PacketCreator.CreateDataPacket(this.StreamId.IntegerValue, buffer, _sendOffset, eos);
if (i == 0 && data.Length >= QuicSettings.MaxStreamData)
{
packet.AttachFrame(new MaxStreamDataFrame(this.StreamId.IntegerValue, (UInt64)(data.Length + 1)));
}
if (_connection.MaximumReached())
{
packet.AttachFrame(new StreamDataBlockedFrame(StreamId.IntegerValue, (UInt64)data.Length));
}
_sendOffset += (UInt64)buffer.Length;
_connection.SendData(packet);
}
return(true);
}
public Packet Unpack(byte[] data)
{
Packet result = null;
var type = GetPacketType(data);
switch (type)
{
case QuicPacketType.Initial: result = new InitialPacket(); break;
case QuicPacketType.ShortHeader: result = new ShortHeaderPacket(); break;
}
if (result == null)
{
return(null);
}
result.Decode(data);
return(result);
}
/// <summary>
/// Client only!
/// </summary>
/// <returns></returns>
internal void ReceivePacket()
{
Packet packet = _pwt.ReadPacket();
if (packet is ShortHeaderPacket)
{
ShortHeaderPacket shp = (ShortHeaderPacket)packet;
ProcessFrames(shp.GetFrames());
}
// If the connection has been closed
if (_state == ConnectionState.Draining)
{
if (string.IsNullOrWhiteSpace(_lastError))
{
_lastError = "Protocol error";
}
TerminateConnection();
throw new QuicConnectivityException(_lastError);
}
}
internal void SendMaximumStreamReachedError()
{
ShortHeaderPacket packet = PacketCreator.CreateConnectionClosePacket(Infrastructure.ErrorCode.STREAM_LIMIT_ERROR, 0x00, ErrorConstants.MaxNumberOfStreams);
Send(packet);
}
internal void SendMaximumStreamReachedError()
{
ShortHeaderPacket packet = PacketCreator.CreateConnectionClosePacket(Infrastructure.ErrorCode.STREAM_LIMIT_ERROR, "Maximum number of streams reached.");
Context.Send(packet);
}