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/*
* Copyright (C) 2012 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_RTC_DATA_CHANNEL_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_RTC_DATA_CHANNEL_H_
#include <memory>
#include "base/gtest_prod_util.h"
#include "base/single_thread_task_runner.h"
#include "base/threading/thread_checker.h"
#include "third_party/blink/renderer/bindings/core/v8/active_script_wrappable.h"
#include "third_party/blink/renderer/core/execution_context/execution_context_lifecycle_observer.h"
#include "third_party/blink/renderer/core/typed_arrays/array_buffer_view_helpers.h"
#include "third_party/blink/renderer/modules/event_target_modules.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
#include "third_party/blink/renderer/platform/timer.h"
#include "third_party/webrtc/api/peer_connection_interface.h"
namespace blink {
class Blob;
class DOMArrayBuffer;
class DOMArrayBufferView;
class ExceptionState;
class RTCPeerConnectionHandler;
class MODULES_EXPORT RTCDataChannel final
: public EventTargetWithInlineData,
public ActiveScriptWrappable<RTCDataChannel>,
public ExecutionContextLifecycleObserver {
USING_GARBAGE_COLLECTED_MIXIN(RTCDataChannel);
DEFINE_WRAPPERTYPEINFO();
USING_PRE_FINALIZER(RTCDataChannel, Dispose);
public:
RTCDataChannel(ExecutionContext*,
scoped_refptr<webrtc::DataChannelInterface> channel,
RTCPeerConnectionHandler* peer_connection_handler);
~RTCDataChannel() override;
String label() const;
// DEPRECATED
bool reliable() const;
bool ordered() const;
base::Optional<uint16_t> maxPacketLifeTime() const;
base::Optional<uint16_t> maxRetransmits() const;
String protocol() const;
bool negotiated() const;
base::Optional<uint16_t> id() const;
String readyState() const;
unsigned bufferedAmount() const;
unsigned bufferedAmountLowThreshold() const;
void setBufferedAmountLowThreshold(unsigned);
String binaryType() const;
void setBinaryType(const String&, ExceptionState&);
// Functions called from RTCPeerConnection's DidAddRemoteDataChannel
// in order to make things happen in the specified order when announcing
// a remote channel.
void SetStateToOpenWithoutEvent();
void DispatchOpenEvent();
void send(const String&, ExceptionState&);
void send(DOMArrayBuffer*, ExceptionState&);
void send(NotShared<DOMArrayBufferView>, ExceptionState&);
void send(Blob*, ExceptionState&);
void close();
DEFINE_ATTRIBUTE_EVENT_LISTENER(open, kOpen)
DEFINE_ATTRIBUTE_EVENT_LISTENER(bufferedamountlow, kBufferedamountlow)
DEFINE_ATTRIBUTE_EVENT_LISTENER(error, kError)
DEFINE_ATTRIBUTE_EVENT_LISTENER(close, kClose)
DEFINE_ATTRIBUTE_EVENT_LISTENER(closing, kClosing)
DEFINE_ATTRIBUTE_EVENT_LISTENER(message, kMessage)
// EventTarget
const AtomicString& InterfaceName() const override;
ExecutionContext* GetExecutionContext() const override;
// ExecutionContextLifecycleObserver
void ContextDestroyed() override;
// ScriptWrappable
bool HasPendingActivity() const override;
void Trace(Visitor*) override;
private:
friend class Observer;
// Implementation of webrtc::DataChannelObserver that receives events on
// webrtc's signaling thread and forwards them over to the main thread for
// handling. Since the |blink_channel_|'s lifetime is scoped potentially
// narrower than the |webrtc_channel_|, the observer is reference counted to
// make sure all callbacks have a valid pointer but won't do anything if the
// |blink_channel_| has gone away.
class Observer : public WTF::ThreadSafeRefCounted<RTCDataChannel::Observer>,
public webrtc::DataChannelObserver {
public:
Observer(scoped_refptr<base::SingleThreadTaskRunner> main_thread,
RTCDataChannel* blink_channel,
scoped_refptr<webrtc::DataChannelInterface> channel);
~Observer() override;
// Returns a reference to |webrtc_channel_|. Typically called from the main
// thread except for on observer registration, done in a synchronous call to
// the signaling thread (safe because the call is synchronous).
const scoped_refptr<webrtc::DataChannelInterface>& channel() const;
// Clears the |blink_channel_| reference, disassociates this observer from
// the |webrtc_channel_| and releases the |webrtc_channel_| pointer. Must be
// called on the main thread.
void Unregister();
// webrtc::DataChannelObserver implementation, called from signaling thread.
void OnStateChange() override;
void OnBufferedAmountChange(uint64_t sent_data_size) override;
void OnMessage(const webrtc::DataBuffer& buffer) override;
private:
// webrtc::DataChannelObserver implementation on the main thread.
void OnStateChangeImpl(webrtc::DataChannelInterface::DataState state);
void OnBufferedAmountChangeImpl(unsigned sent_data_size);
void OnMessageImpl(std::unique_ptr<webrtc::DataBuffer> buffer);
const scoped_refptr<base::SingleThreadTaskRunner> main_thread_;
WeakPersistent<RTCDataChannel> blink_channel_;
scoped_refptr<webrtc::DataChannelInterface> webrtc_channel_;
};
void OnStateChange(webrtc::DataChannelInterface::DataState state);
void OnBufferedAmountChange(unsigned previous_amount);
void OnMessage(std::unique_ptr<webrtc::DataBuffer> buffer);
void Dispose();
void ScheduleDispatchEvent(Event*);
void ScheduledEventTimerFired(TimerBase*);
const scoped_refptr<webrtc::DataChannelInterface>& channel() const;
bool SendRawData(const char* data, size_t length);
webrtc::DataChannelInterface::DataState state_;
enum BinaryType { kBinaryTypeBlob, kBinaryTypeArrayBuffer };
BinaryType binary_type_;
TaskRunnerTimer<RTCDataChannel> scheduled_event_timer_;
HeapVector<Member<Event>> scheduled_events_;
FRIEND_TEST_ALL_PREFIXES(RTCDataChannelTest, Open);
FRIEND_TEST_ALL_PREFIXES(RTCDataChannelTest, Close);
FRIEND_TEST_ALL_PREFIXES(RTCDataChannelTest, Message);
FRIEND_TEST_ALL_PREFIXES(RTCDataChannelTest, BufferedAmountLow);
unsigned buffered_amount_low_threshold_;
unsigned buffered_amount_;
bool stopped_;
bool closed_from_owner_;
scoped_refptr<Observer> observer_;
THREAD_CHECKER(thread_checker_);
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_RTC_DATA_CHANNEL_H_
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