Only try to pair protocol matching candidates for creating connections.

webrtc/p2p/base/relayport.h

 /*
  *  Copyright 2004 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 42 matching lines @@
 
   const std::vector<OptionValue>& options() const { return options_; }
   bool HasMagicCookie(const char* data, size_t size);
 
   virtual void PrepareAddress();
   virtual Connection* CreateConnection(const Candidate& address,
                                        CandidateOrigin origin);
   virtual int SetOption(rtc::Socket::Option opt, int value);
   virtual int GetOption(rtc::Socket::Option opt, int* value);
   virtual int GetError();
+  virtual bool SupportsProtocol(const std::string& protocol) const {
+    // Relay port may create both TCP and UDP connections.
+    return true;
+  }
 
   const ProtocolAddress * ServerAddress(size_t index) const;
   bool IsReady() { return ready_; }
 
   // Used for testing.
   sigslot::signal1<const ProtocolAddress*> SignalConnectFailure;
   sigslot::signal1<const ProtocolAddress*> SignalSoftTimeout;
 
  protected:
   RelayPort(rtc::Thread* thread,
@@ skipping 26 matching lines @@
   std::vector<ProtocolAddress> external_addr_;
   bool ready_;
   std::vector<RelayEntry*> entries_;
   std::vector<OptionValue> options_;
   int error_;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_P2P_BASE_RELAYPORT_H_