private void ReceiveVoiceAsync(CancellationToken cancelToken)
{
try
{
byte[] packet, decodingBuffer = null, nonce = null, result;
int packetLength, resultOffset, resultLength;
IPEndPoint endpoint = new IPEndPoint(IPAddress.Any, 0);
if ((_client.Config.VoiceMode & DiscordVoiceMode.Incoming) != 0)
{
decodingBuffer = new byte[MaxOpusSize];
nonce = new byte[24];
}
while (!cancelToken.IsCancellationRequested)
{
Thread.Sleep(1);
if (_udp.Available > 0)
{
packet = _udp.Receive(ref endpoint);
packetLength = packet.Length;
if (packetLength > 0 && endpoint.Equals(_endpoint))
{
if (_state != (int)WebSocketState.Connected)
{
if (packetLength != 70)
{
return;
}
int port = packet[68] | packet[69] << 8;
string ip = Encoding.ASCII.GetString(packet, 4, 70 - 6).TrimEnd('\0');
var login2 = new VoiceLogin2Command();
login2.Payload.Protocol = "udp";
login2.Payload.SocketData.Address = ip;
login2.Payload.SocketData.Mode = _encryptionMode;
login2.Payload.SocketData.Port = port;
QueueMessage(login2);
if ((_client.Config.VoiceMode & DiscordVoiceMode.Incoming) == 0)
{
return;
}
}
else
{
//Parse RTP Data
if (packetLength < 12)
{
return;
}
byte flags = packet[0];
if (flags != 0x80)
{
return;
}
byte payloadType = packet[1];
if (payloadType != 0x78)
{
return;
}
ushort sequenceNumber = (ushort)((packet[2] << 8) |
packet[3] << 0);
uint timestamp = (uint)((packet[4] << 24) |
(packet[5] << 16) |
(packet[6] << 8) |
(packet[7] << 0));
uint ssrc = (uint)((packet[8] << 24) |
(packet[9] << 16) |
(packet[10] << 8) |
(packet[11] << 0));
//Decrypt
if (_isEncrypted)
{
if (packetLength < 28) //12 + 16 (RTP + Poly1305 MAC)
{
return;
}
Buffer.BlockCopy(packet, 0, nonce, 0, 12);
int ret = Sodium.Decrypt(packet, 12, packetLength - 12, decodingBuffer, nonce, _secretKey);
if (ret != 0)
{
continue;
}
result = decodingBuffer;
resultOffset = 0;
resultLength = packetLength - 28;
}
else //Plain
{
result = packet;
resultOffset = 12;
resultLength = packetLength - 12;
}
/*if (_logLevel >= LogMessageSeverity.Debug)
* RaiseOnLog(LogMessageSeverity.Debug, $"Received {buffer.Length - 12} bytes.");*/
string userId;
if (_ssrcMapping.TryGetValue(ssrc, out userId))
{
RaiseOnPacket(userId, _channelId, result, resultOffset, resultLength);
}
}
}
}
}
}
catch (OperationCanceledException) { }
catch (InvalidOperationException) { } //Includes ObjectDisposedException
}
private void ReceiveVoiceAsync(CancellationToken cancelToken)
{
try
{
byte[] packet, decodingBuffer = null, nonce = null, result;
int packetLength, resultOffset, resultLength;
IPEndPoint endpoint = new IPEndPoint(IPAddress.Any, 0);
if ((_client.Config.VoiceMode & DiscordVoiceMode.Incoming) != 0)
{
decodingBuffer = new byte[MaxOpusSize];
nonce = new byte[24];
}
while (!cancelToken.IsCancellationRequested)
{
Thread.Sleep(1);
if (_udp.Available > 0)
{
packet = _udp.Receive(ref endpoint);
packetLength = packet.Length;
if (packetLength > 0 && endpoint.Equals(_endpoint))
{
if (_state != (int)WebSocketState.Connected)
{
if (packetLength != 70)
return;
int port = packet[68] | packet[69] << 8;
string ip = Encoding.ASCII.GetString(packet, 4, 70 - 6).TrimEnd('\0');
var login2 = new VoiceLogin2Command();
login2.Payload.Protocol = "udp";
login2.Payload.SocketData.Address = ip;
login2.Payload.SocketData.Mode = _encryptionMode;
login2.Payload.SocketData.Port = port;
QueueMessage(login2);
if ((_client.Config.VoiceMode & DiscordVoiceMode.Incoming) == 0)
return;
}
else
{
//Parse RTP Data
if (packetLength < 12)
return;
byte flags = packet[0];
if (flags != 0x80)
return;
byte payloadType = packet[1];
if (payloadType != 0x78)
return;
ushort sequenceNumber = (ushort)((packet[2] << 8) |
packet[3] << 0);
uint timestamp = (uint)((packet[4] << 24) |
(packet[5] << 16) |
(packet[6] << 8) |
(packet[7] << 0));
uint ssrc = (uint)((packet[8] << 24) |
(packet[9] << 16) |
(packet[10] << 8) |
(packet[11] << 0));
//Decrypt
if (_isEncrypted)
{
if (packetLength < 28) //12 + 16 (RTP + Poly1305 MAC)
return;
Buffer.BlockCopy(packet, 0, nonce, 0, 12);
int ret = Sodium.Decrypt(packet, 12, packetLength - 12, decodingBuffer, nonce, _secretKey);
if (ret != 0)
continue;
result = decodingBuffer;
resultOffset = 0;
resultLength = packetLength - 28;
}
else //Plain
{
result = packet;
resultOffset = 12;
resultLength = packetLength - 12;
}
/*if (_logLevel >= LogMessageSeverity.Debug)
RaiseOnLog(LogMessageSeverity.Debug, $"Received {buffer.Length - 12} bytes.");*/
string userId;
if (_ssrcMapping.TryGetValue(ssrc, out userId))
RaiseOnPacket(userId, _channelId, result, resultOffset, resultLength);
}
}
}
}
}
catch (OperationCanceledException) { }
catch (InvalidOperationException) { } //Includes ObjectDisposedException
}
