File: FlowManager.hxx

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#if !defined(FlowManager_hxx)
#define FlowManager_hxx

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "MediaStream.hxx"
#include "FlowManagerException.hxx"

#include "dtls_wrapper/DtlsFactory.hxx"
#include <openssl/crypto.h>
#include <openssl/ssl.h>

#include <map>

using namespace reTurn;

namespace flowmanager
{

/**
  This class represents the Flow Manager.  It is responsible for sending/receiving
  media and performing the necessary NAT traversal.  
  
  Threading Notes:  This class implements a thread
  to manage the asyncrouns reTurn client library calls.  Essentially all
  asyncrounous operations for all Flows will be called from this one thread.

  Author: Scott Godin (sgodin AT SipSpectrum DOT com)
*/
class IOServiceThread;

class FlowManager
{
public:  
   FlowManager();  // throws FlowManagerException
   virtual ~FlowManager();

   // This API assumes that RTCP localBinding is always the same as RTP binding but add one to the port number
   // We can add a new API in the future to accomodate, custom RTCP bindings as required
   MediaStream* createMediaStream(MediaStreamHandler& mediaStreamHandler,
                                  const StunTuple& localBinding, 
                                  bool rtcpEnabled = true,
                                  MediaStream::NatTraversalMode natTraversalMode = MediaStream::NoNatTraversal,
                                  const char* natTraversalServerHostname = 0, 
                                  unsigned short natTraversalServerPort = 0, 
                                  const char* stunUsername = 0,
                                  const char* stunPassword = 0);

   void initializeDtlsFactory(const char* certAor);
   dtls::DtlsFactory* getDtlsFactory() { return mDtlsFactory; }

protected: 

private:
   static void srtpEventHandler(srtp_event_data_t *data);

   // Member variables used to manager asio io service thread
   asio::io_service mIOService;
   IOServiceThread* mIOServiceThread;
   asio::io_service::work* mIOServiceWork;
   static int createCert (const resip::Data& pAor, int expireDays, int keyLen, X509*& outCert, EVP_PKEY*& outKey );
   asio::ssl::context mSslContext;
   
   X509* mClientCert;
   EVP_PKEY* mClientKey;
   dtls::DtlsFactory* mDtlsFactory;
};

}

#endif


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