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// Copyright 2014 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_QUIC_PACKET_WRITER_WRAPPER_H_
#define QUICHE_QUIC_CORE_QUIC_PACKET_WRITER_WRAPPER_H_
#include <cstddef>
#include <memory>
#include "quiche/quic/core/quic_packet_writer.h"
namespace quic {
// Wraps a writer object to allow dynamically extending functionality. Use
// cases: replace writer while dispatcher and connections hold on to the
// wrapper; mix in monitoring; mix in mocks in unit tests.
class QUICHE_EXPORT QuicPacketWriterWrapper : public QuicPacketWriter {
public:
QuicPacketWriterWrapper();
QuicPacketWriterWrapper(const QuicPacketWriterWrapper&) = delete;
QuicPacketWriterWrapper& operator=(const QuicPacketWriterWrapper&) = delete;
~QuicPacketWriterWrapper() override;
// Default implementation of the QuicPacketWriter interface. Passes everything
// to |writer_|.
WriteResult WritePacket(const char* buffer, size_t buf_len,
const QuicIpAddress& self_address,
const QuicSocketAddress& peer_address,
PerPacketOptions* options,
const QuicPacketWriterParams& params) override;
bool IsWriteBlocked() const override;
void SetWritable() override;
std::optional<int> MessageTooBigErrorCode() const override;
QuicByteCount GetMaxPacketSize(
const QuicSocketAddress& peer_address) const override;
bool SupportsReleaseTime() const override;
bool IsBatchMode() const override;
bool SupportsEcn() const override { return writer_->SupportsEcn(); }
QuicPacketBuffer GetNextWriteLocation(
const QuicIpAddress& self_address,
const QuicSocketAddress& peer_address) override;
WriteResult Flush() override;
// Takes ownership of |writer|.
void set_writer(QuicPacketWriter* writer);
// Does not take ownership of |writer|.
void set_non_owning_writer(QuicPacketWriter* writer);
virtual void set_peer_address(const QuicSocketAddress& /*peer_address*/) {}
QuicPacketWriter* writer() { return writer_; }
private:
void unset_writer();
QuicPacketWriter* writer_ = nullptr;
bool owns_writer_ = false;
};
} // namespace quic
#endif // QUICHE_QUIC_CORE_QUIC_PACKET_WRITER_WRAPPER_H_