public int Receive(byte[] recv_buffer, int size, SocketFlags flags, out int bytesRead, out int protocolSize, out bool sendback)
{
bytesRead = _socket.Receive(recv_buffer, size, flags);
protocolSize = 0;
if (bytesRead > 0)
{
lock (_decryptionLock)
{
int bytesToSend = 0;
int obfsRecvSize;
byte[] remoteRecvObfsBuffer = _obfs.ClientDecode(recv_buffer, bytesRead, out obfsRecvSize, out sendback);
if (obfsRecvSize > 0)
{
Util.Utils.SetArrayMinSize(ref ReceiveDecryptBuffer, obfsRecvSize);
_encryptor.Decrypt(remoteRecvObfsBuffer, obfsRecvSize, ReceiveDecryptBuffer, out bytesToSend);
int outlength;
protocolSize = bytesToSend;
byte[] buffer = _protocol.ClientPostDecrypt(ReceiveDecryptBuffer, bytesToSend, out outlength);
TcpMSS = _protocol.GetTcpMSS();
//if (recv_buffer.Length < outlength) //ASSERT
Array.Copy(buffer, 0, recv_buffer, 0, outlength);
return(outlength);
}
}
return(0);
}
else
{
sendback = false;
_close = true;
}
return(bytesRead);
}
public int EndReceive(IAsyncResult ar, out bool sendback)
{
int bytesRead = _socket.EndReceive(ar);
sendback = false;
if (bytesRead > 0)
{
CallbackState st = (CallbackState)ar.AsyncState;
st.size = bytesRead;
lock (_decryptionLock)
{
int bytesToSend = 0;
int obfsRecvSize;
byte[] remoteRecvObfsBuffer = _obfs.ClientDecode(st.buffer, bytesRead, out obfsRecvSize, out sendback);
if (obfsRecvSize > 0)
{
_encryptor.Decrypt(remoteRecvObfsBuffer, obfsRecvSize, ReceiveDecryptBuffer, out bytesToSend);
int outlength;
byte[] buffer = _protocol.ClientPostDecrypt(ReceiveDecryptBuffer, bytesToSend, out outlength);
Array.Copy(buffer, 0, st.buffer, 0, outlength);
return(outlength);
}
}
return(0);
}
else
{
_close = true;
}
return(bytesRead);
}
public override byte[] ClientDecode(byte[] encryptdata, int datalength, out int outlength, out bool needsendback)
{
if (subObfs != null)
{
return(subObfs.ClientDecode(encryptdata, datalength, out outlength, out needsendback));
}
outlength = datalength;
needsendback = false;
return(encryptdata);
}