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/*
* Copyright (C) 2023-2025 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
#include "ActiveDOMObject.h"
#include "WebTransportCongestionControl.h"
#include "WebTransportReliabilityMode.h"
#include "WebTransportSessionClient.h"
#include <wtf/ListHashSet.h>
#include <wtf/RefCounted.h>
#include <wtf/WeakHashSet.h>
namespace JSC {
class JSGlobalObject;
}
namespace WebCore {
enum class WebTransportCongestionControl : uint8_t;
class DOMException;
class DOMPromise;
class DatagramSource;
class DeferredPromise;
class Exception;
class JSDOMGlobalObject;
class ReadableStream;
class ReadableStreamSource;
class ScriptExecutionContext;
class SocketProvider;
class WebTransportBidirectionalStreamSource;
class WebTransportDatagramDuplexStream;
class WebTransportDatagramsWritable;
class WebTransportError;
class WebTransportReceiveStreamSource;
class WebTransportSendGroup;
class WebTransportSendStream;
class WebTransportSendStreamSink;
class WebTransportSession;
class WorkerWebTransportSession;
class WritableStream;
struct WebTransportCloseInfo;
struct WebTransportOptions;
struct WebTransportSendStreamOptions;
struct WebTransportHash;
template<typename> class ExceptionOr;
class WebTransport : public WebTransportSessionClient, public ActiveDOMObject {
public:
static ExceptionOr<Ref<WebTransport>> create(ScriptExecutionContext&, String&&, WebTransportOptions&&);
~WebTransport();
// ActiveDOMObject.
void ref() const final { WebTransportSessionClient::ref(); }
void deref() const final { WebTransportSessionClient::deref(); }
void getStats(ScriptExecutionContext&, Ref<DeferredPromise>&&);
DOMPromise& ready();
WebTransportReliabilityMode reliability();
WebTransportCongestionControl congestionControl();
std::optional<uint16_t> anticipatedConcurrentIncomingUnidirectionalStreams();
void setAnticipatedConcurrentIncomingUnidirectionalStreams(std::optional<uint16_t>);
std::optional<uint16_t> anticipatedConcurrentIncomingBidirectionalStreams();
void setAnticipatedConcurrentIncomingBidirectionalStreams(std::optional<uint16_t>);
String& protocol();
DOMPromise& closed();
DOMPromise& draining();
void close(WebTransportCloseInfo&&);
WebTransportDatagramDuplexStream& datagrams();
void createBidirectionalStream(ScriptExecutionContext&, WebTransportSendStreamOptions&&, Ref<DeferredPromise>&&);
ReadableStream& incomingBidirectionalStreams();
void createUnidirectionalStream(ScriptExecutionContext&, WebTransportSendStreamOptions&&, Ref<DeferredPromise>&&);
ReadableStream& incomingUnidirectionalStreams();
Ref<WebTransportSendGroup> createSendGroup();
static bool supportsReliableOnly();
RefPtr<WebTransportSession> session();
void datagramsWritableCreated(WebTransportDatagramsWritable&);
void cleanupContext(ScriptExecutionContext&);
private:
WebTransport(ScriptExecutionContext&, JSDOMGlobalObject&, Ref<ReadableStream>&&, Ref<ReadableStream>&&, const WebTransportOptions&, Ref<WebTransportDatagramDuplexStream>&&, Ref<DatagramSource>&&, Ref<WebTransportReceiveStreamSource>&&, Ref<WebTransportBidirectionalStreamSource>&&);
void initializeOverHTTP(SocketProvider&, ScriptExecutionContext&, URL&&, WebTransportOptions&&);
void cleanup(Ref<DOMException>&&, std::optional<WebTransportCloseInfo>&&);
void cleanupWithSessionError();
// ActiveDOMObject.
bool virtualHasPendingActivity() const final;
void receiveDatagram(std::span<const uint8_t>, bool, std::optional<Exception>&&) final;
void receiveIncomingUnidirectionalStream(WebTransportStreamIdentifier) final;
void receiveBidirectionalStream(Ref<WebTransportSendStreamSink>&&) final;
void streamReceiveBytes(WebTransportStreamIdentifier, std::span<const uint8_t>, bool, std::optional<Exception>&&) final;
void streamReceiveError(WebTransportStreamIdentifier, uint64_t) final;
void streamSendError(WebTransportStreamIdentifier, uint64_t) final;
void didFail(std::optional<uint32_t>&&, String&&) final;
void didDrain() final;
RefPtr<WebTransportSession> protectedSession();
ListHashSet<Ref<WritableStream>> m_sendStreams;
ListHashSet<Ref<ReadableStream>> m_receiveStreams;
const Ref<ReadableStream> m_incomingBidirectionalStreams;
const Ref<ReadableStream> m_incomingUnidirectionalStreams;
// https://www.w3.org/TR/webtransport/#dom-webtransport-state-slot
enum class State : uint8_t {
Connecting,
Connected,
Draining,
Closed,
Failed
};
State m_state { State::Connecting };
using PromiseAndWrapper = const std::pair<const Ref<DOMPromise>, const Ref<DeferredPromise>>;
const PromiseAndWrapper m_ready;
WebTransportReliabilityMode m_reliability { WebTransportReliabilityMode::Pending };
WebTransportCongestionControl m_congestionControl { WebTransportCongestionControl::Default };
std::optional<uint16_t> m_anticipatedConcurrentIncomingUnidirectionalStreams;
std::optional<uint16_t> m_anticipatedConcurrentIncomingBidirectionalStreams;
String m_protocol;
const PromiseAndWrapper m_closed;
const PromiseAndWrapper m_draining;
const Ref<WebTransportDatagramDuplexStream> m_datagrams;
RefPtr<WebTransportSession> m_session;
const Ref<DatagramSource> m_datagramSource;
const Ref<WebTransportReceiveStreamSource> m_receiveStreamSource;
const Ref<WebTransportBidirectionalStreamSource> m_bidirectionalStreamSource;
HashMap<WebTransportStreamIdentifier, Ref<WebTransportReceiveStreamSource>> m_readStreamSources;
HashMap<WebTransportStreamIdentifier, Ref<WebTransportSendStream>> m_writeStreams;
WeakHashSet<WebTransportDatagramsWritable> m_datagramsWritables;
};
}
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