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+/*
+ * Copyright 2017 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.
+ */
+
+#ifndef API_TURN_CUSTOMIZER_H_
+#define API_TURN_CUSTOMIZER_H_
+
+#include <stdlib.h>
+
+#include "api/transport/stun.h"
+
+namespace cricket {
+class PortInterface;
+} // namespace cricket
+
+namespace webrtc {
+
+class TurnCustomizer {
+ public:
+ // This is called before a TURN message is sent.
+ // This could be used to add implementation specific attributes to a request.
+ virtual void MaybeModifyOutgoingStunMessage(
+ cricket::PortInterface* port,
+ cricket::StunMessage* message) = 0;
+
+ // TURN can send data using channel data messages or Send indication.
+ // This method should return false if `data` should be sent using
+ // a Send indication instead of a ChannelData message, even if a
+ // channel is bound.
+ virtual bool AllowChannelData(cricket::PortInterface* port,
+ const void* data,
+ size_t size,
+ bool payload) = 0;
+
+ virtual ~TurnCustomizer() {}
+};
+
+} // namespace webrtc
+
+#endif // API_TURN_CUSTOMIZER_H_