public static async Task <List <IEnvelope> > ReceivePackets(EnvelopeReaderBuffer readerBuffer, Stream stream, CancellationToken ct)
{
var receivedPackets = new List <IEnvelope>();
int currentBytesRead;
TLSEnvelope packet;
do
{
currentBytesRead = await stream.ReadAsync(readerBuffer.Buffer, 0, readerBuffer.Buffer.Length, ct);
TLSEnvelopeExtensions.UpdatePayload(currentBytesRead, readerBuffer);
packet = TLSEnvelopeExtensions.TryTakeOnePacket(ref readerBuffer.Payload);
if (packet != null)
{
receivedPackets.Add(packet);
}
} while (currentBytesRead > 0 && (packet == null || readerBuffer.Payload != null));
return(receivedPackets);
}
public async Task <string> Receive(byte[] rawRequest, Transport transport)
{
Debug.Assert(transport == Transport.UDP);
try
{
if (rawRequest == null || rawRequest.Length == 0)
{
throw new Exception("TLSClient received null or empty packet");
}
var tlsEnvelope = new TLSEnvelope(rawRequest);
if (!TLSEnvelopeExtensions.ValidateCrc32(rawRequest, out var actualCrc32))
{
throw new Exception($"TLSEnvelope CRC32 Error: Expected: {tlsEnvelope.Crc32}, actual: {actualCrc32}");
}
var request = await this.Ratchet.DecryptRequest(tlsEnvelope);
var command = request.ParseCommand();
if (!command.CommandId.IsCommandDefined())
{
throw new Exception($"TLSClient: The command {command.CommandId} is not defined.");
}
await ProcessCommand(command);
}
catch (Exception e)
{
var error = $"{nameof(TLSClient)} received bad request via {transport}: {e.Message}";
this._log.LogError(error);
}
return(null); // this goes back to the IUdpConnection and is not used there.
}