chromium/net/third_party/quiche/src/quiche/quic/core/http/web_transport_http3.h

// Copyright 2021 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef QUICHE_QUIC_CORE_HTTP_WEB_TRANSPORT_HTTP3_H_
#define QUICHE_QUIC_CORE_HTTP_WEB_TRANSPORT_HTTP3_H_

#include <memory>
#include <optional>

#include "absl/base/attributes.h"
#include "absl/container/flat_hash_set.h"
#include "absl/time/time.h"
#include "quiche/quic/core/http/quic_spdy_session.h"
#include "quiche/quic/core/http/web_transport_stream_adapter.h"
#include "quiche/quic/core/quic_error_codes.h"
#include "quiche/quic/core/quic_stream.h"
#include "quiche/quic/core/quic_types.h"
#include "quiche/quic/core/web_transport_interface.h"
#include "quiche/quic/core/web_transport_stats.h"
#include "quiche/common/http/http_header_block.h"
#include "quiche/common/platform/api/quiche_mem_slice.h"
#include "quiche/common/quiche_callbacks.h"
#include "quiche/web_transport/web_transport.h"

namespace quic {

class QuicSpdySession;
class QuicSpdyStream;

enum class WebTransportHttp3RejectionReason { … };

// A session of WebTransport over HTTP/3.  The session is owned by
// QuicSpdyStream object for the CONNECT stream that established it.
//
// WebTransport over HTTP/3 specification:
// <https://datatracker.ietf.org/doc/html/draft-ietf-webtrans-http3>
class QUICHE_EXPORT WebTransportHttp3
    : public WebTransportSession,
      public QuicSpdyStream::Http3DatagramVisitor { … };

class QUICHE_EXPORT WebTransportHttp3UnidirectionalStream : public QuicStream { … };

// Remaps HTTP/3 error code into a WebTransport error code.  Returns nullopt if
// the provided code is outside of valid range.
QUICHE_EXPORT std::optional<WebTransportStreamError> Http3ErrorToWebTransport(
    uint64_t http3_error_code);

// Same as above, but returns default error value (zero) when none could be
// mapped.
QUICHE_EXPORT WebTransportStreamError
Http3ErrorToWebTransportOrDefault(uint64_t http3_error_code);

// Remaps WebTransport error code into an HTTP/3 error code.
QUICHE_EXPORT uint64_t
WebTransportErrorToHttp3(WebTransportStreamError webtransport_error_code);

}  // namespace quic

#endif  // QUICHE_QUIC_CORE_HTTP_WEB_TRANSPORT_HTTP3_H_