Only try to pair protocol matching candidates for creating connections.

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 89 matching lines @@
       const rtc::PacketTime& packet_time) {
     OnReadPacket(socket, data, size, remote_addr, packet_time);
     return true;
   }
   virtual void OnReadPacket(rtc::AsyncPacketSocket* socket,
                             const char* data, size_t size,
                             const rtc::SocketAddress& remote_addr,
                             const rtc::PacketTime& packet_time);
 
   virtual void OnReadyToSend(rtc::AsyncPacketSocket* socket);
+  virtual bool ProtocolMatch(const std::string& protocol) const {
+    // Turn port only connects to UDP candidates.
+    return protocol == UDP_PROTOCOL_NAME;
+  }
 
   void OnSocketConnect(rtc::AsyncPacketSocket* socket);
   void OnSocketClose(rtc::AsyncPacketSocket* socket, int error);
 
 
   const std::string& hash() const { return hash_; }
   const std::string& nonce() const { return nonce_; }
 
   int error() const { return error_; }
 
@@ skipping 138 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_