- initial import

2018-06-05 11:05:37 +03:00
commit e1a4931375
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+/* 
+ * Copyright (C) 2007-2010 Dmytro Bogovych <dmytro.bogovych@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+ */
+#ifndef __RELIABLE_TUNNEL_H
+#define __RELIABLE_TUNNEL_H
+
+#include "DataProvider.h"
+#include "InternetAddress.h"
+#include "rutil/ThreadIf.hxx"
+#include <vector>
+#include <string>
+
+#include "../ICE/ICEReliableTransport.h"
+#ifdef USE_CRYPTOPP
+# include "../Libs/CryptoPP/blowfish.h"
+#endif
+#ifdef USE_OPENSSL
+# include "../Libs/openssl/include/openssl/blowfish.h"
+#endif
+
+class ReliableTunnel: public DataProvider, public resip::ThreadIf, public ICEImpl::ReliableTransport::Encryption
+{
+public:
+  ReliableTunnel(const char* streamname);
+  virtual ~ReliableTunnel();
+  
+  // Returns provider RTP name
+  virtual std::string   streamName();
+  
+  // Returns provider RTP profile name
+  virtual std::string   streamProfile();
+  
+  // Sets destination IP address
+  virtual void          setDestinationAddress(InternetAddress& addr);
+
+  // Processes incoming data
+  virtual void          processData(const void* dataBuffer, int dataSize);
+
+  // This method is called by user agent to send ICE packet from mediasocket
+  virtual void          sendData(InternetAddress& destination, const void* dataBuffer, unsigned int datasize);
+
+  // Updates SDP offer
+  virtual void          updateSdpOffer(resip::SdpContents::Session::Medium& sdp);
+
+  // Called by user agent when session is terminated.
+  virtual void          sessionTerminated();
+
+  // Called by user agent when session is started.
+  virtual void          sessionEstablished(int conntype);
+
+    // Called by user agent to save media socket for this provider
+  virtual void          setSocket(DatagramSocket& socket4, DatagramSocket& socket6);
+  
+  // Called by user agent to get media socket for this provider
+  virtual DatagramSocket& socket(int family);
+
+  // Called by user agent to process media stream description from remote peer.
+  // Returns true if description is processed succesfully. Otherwise method returns false.
+  virtual bool          processSdpOffer(const resip::SdpContents::Session::Medium& media); 
+
+  virtual void          thread();
+
+  // Enqueues outgoing packet to sending queue
+  void                  queueData(const void* bufferPtr, int bufferSize);
+  
+  void                  setBandwidth(unsigned int bytesPerSecond);
+  unsigned int          bandwidth();
+  
+  // Checks if there is any received application data
+  bool                  hasData();
+  
+  // Reads received data. If ptr is NULL - the length of available data is returned.
+  unsigned              getData(void* ptr, unsigned capacity);
+
+  void                  setEncryptionKey(void* ptr, unsigned length);
+
+protected:
+  // SDP's stream name
+  std::string             mStreamName;
+
+  // Transport stack
+  ICEImpl::ReliableTransport mStack;  
+  
+  // Socket handles to operate
+  DatagramSocket          mSocket4;
+  DatagramSocket          mSocket6;
+
+  // Destination IP4/6 address
+  InternetAddress         mDestination;
+  
+  // Win32 exit signal
+  HANDLE                  mExitSignal;
+  
+  // Win32 "new outgoing data" signal
+  HANDLE                  mDataSignal;
+  
+  // Mutex to protect queuing/sending outgoing data
+  resip::Mutex            mOutgoingMtx;
+                          
+  std::vector<std::string>          
+                          mNewQueued;
+  resip::Mutex            mNewQueuedGuard;
+  resip::Mutex            mStackGuard;
+
+  unsigned int            mBandwidth;
+  std::string             mEncryptionKey;
+  
+#ifdef USE_CRYPTOPP
+  CryptoPP::BlowfishEncryption mEncryptor;
+  CryptoPP::BlowfishDecryption mDecryptor;
+#endif
+
+#ifdef USE_OPENSSL
+  BF_KEY mCipher;
+#endif
+
+  ICEImpl::ICEByteBuffer  mIncomingData;
+
+  // Returns block size for encryption algorythm
+  int     blockSize();
+      
+  // Encrypts dataPtr buffer inplace. dataSize must be odd to GetBlockSize() returned value.
+  void    encrypt(void* dataPtr, int dataSize);
+
+  // Decrypts dataPtr buffer inplace. dataSize must be odd to GetBlockSize() returned value.
+  void    decrypt(void* dataPtr, int dataSize);
+
+  // Calculates CRC
+  unsigned crc(const void* dataptr, int datasize);
+
+  void sendOutgoing();
+};
+#endif