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/*
* Copyright (C) 2017 Apple 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.
*/
#pragma once
#if ENABLE(WEB_RTC) && USE(LIBWEBRTC)
#include "LibWebRTCMacros.h"
#include "ProcessQualified.h"
#include "RTCDataChannelHandler.h"
#include "RTCDataChannelState.h"
#include "SharedBuffer.h"
#include <wtf/Lock.h>
#include <wtf/ObjectIdentifier.h>
#include <wtf/TZoneMalloc.h>
#include <wtf/WeakPtr.h>
WTF_IGNORE_WARNINGS_IN_THIRD_PARTY_CODE_BEGIN
#include <webrtc/api/data_channel_interface.h>
WTF_IGNORE_WARNINGS_IN_THIRD_PARTY_CODE_END
namespace webrtc {
struct DataChannelInit;
}
namespace WebCore {
class Document;
class RTCDataChannelEvent;
class RTCDataChannelHandlerClient;
struct RTCDataChannelInit;
class ScriptExecutionContext;
class LibWebRTCDataChannelHandler final : public RTCDataChannelHandler, private webrtc::DataChannelObserver {
WTF_MAKE_TZONE_ALLOCATED(LibWebRTCDataChannelHandler);
public:
explicit LibWebRTCDataChannelHandler(rtc::scoped_refptr<webrtc::DataChannelInterface>&&);
~LibWebRTCDataChannelHandler();
RTCDataChannelInit dataChannelInit() const;
String label() const;
static webrtc::DataChannelInit fromRTCDataChannelInit(const RTCDataChannelInit&);
private:
// RTCDataChannelHandler API
void setClient(RTCDataChannelHandlerClient&, std::optional<ScriptExecutionContextIdentifier>) final;
bool sendStringData(const CString&) final;
bool sendRawData(std::span<const uint8_t>) final;
void close() final;
std::optional<unsigned short> id() const final;
// webrtc::DataChannelObserver API
void OnStateChange();
void OnMessage(const webrtc::DataBuffer&);
void OnBufferedAmountChange(uint64_t);
void checkState();
struct StateChange {
RTCDataChannelState state;
std::optional<webrtc::RTCError> error;
};
using Message = std::variant<StateChange, String, Ref<FragmentedSharedBuffer>>;
using PendingMessages = Vector<Message>;
void storeMessage(PendingMessages&, const webrtc::DataBuffer&);
void processMessage(const webrtc::DataBuffer&);
void processStoredMessage(Message&);
void postTask(Function<void()>&&);
rtc::scoped_refptr<webrtc::DataChannelInterface> m_channel;
Lock m_clientLock;
bool m_hasClient WTF_GUARDED_BY_LOCK(m_clientLock) { false };
WeakPtr<RTCDataChannelHandlerClient> m_client WTF_GUARDED_BY_LOCK(m_clientLock) { nullptr };
Markable<ScriptExecutionContextIdentifier> m_contextIdentifier;
PendingMessages m_bufferedMessages WTF_GUARDED_BY_LOCK(m_clientLock);
};
} // namespace WebCore
#endif // ENABLE(WEB_RTC) && USE(LIBWEBRTC)
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