Add config to prune TURN ports

webrtc/p2p/base/turnport.h

 /*
  *  Copyright 2012 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 67 matching lines @@
   const ProtocolAddress& server_address() const { return server_address_; }
   // Returns an empty address if the local address has not been assigned.
   rtc::SocketAddress GetLocalAddress() const;
 
   bool ready() const { return state_ == STATE_READY; }
   bool connected() const {
     return state_ == STATE_READY || state_ == STATE_CONNECTED;
   }
   const RelayCredentials& credentials() const { return credentials_; }
 
+  virtual ProtocolType GetProtocol() const { return server_address_.proto; }
+
   virtual void PrepareAddress();
   virtual Connection* CreateConnection(
       const Candidate& c, PortInterface::CandidateOrigin origin);
   virtual int SendTo(const void* data, size_t size,
                      const rtc::SocketAddress& addr,
                      const rtc::PacketOptions& options,
                      bool payload);
   virtual int SetOption(rtc::Socket::Option opt, int value);
   virtual int GetOption(rtc::Socket::Option opt, int* value);
   virtual int GetError();
@@ skipping 184 matching lines @@
   friend class TurnEntry;
   friend class TurnAllocateRequest;
   friend class TurnRefreshRequest;
   friend class TurnCreatePermissionRequest;
   friend class TurnChannelBindRequest;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_P2P_BASE_TURNPORT_H_