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// Copyright (c) 2017 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_SESSION_NOTIFIER_INTERFACE_H_
#define QUICHE_QUIC_CORE_SESSION_NOTIFIER_INTERFACE_H_
#include "quic/core/frames/quic_frame.h"
#include "quic/core/quic_time.h"
namespace quic {
// Pure virtual class to be notified when a packet containing a frame is acked
// or lost.
class QUIC_EXPORT_PRIVATE SessionNotifierInterface {
public:
virtual ~SessionNotifierInterface() {}
// Called when |frame| is acked. Returns true if any new data gets acked,
// returns false otherwise.
virtual bool OnFrameAcked(const QuicFrame& frame,
QuicTime::Delta ack_delay_time,
QuicTime receive_timestamp) = 0;
// Called when |frame| is retransmitted.
virtual void OnStreamFrameRetransmitted(const QuicStreamFrame& frame) = 0;
// Called when |frame| is considered as lost.
virtual void OnFrameLost(const QuicFrame& frame) = 0;
// Called to retransmit |frames| with transmission |type|.
virtual void RetransmitFrames(const QuicFrames& frames,
TransmissionType type) = 0;
// Returns true if |frame| is outstanding and waiting to be acked.
virtual bool IsFrameOutstanding(const QuicFrame& frame) const = 0;
// Returns true if crypto stream is waiting for acks.
virtual bool HasUnackedCryptoData() const = 0;
// Returns true if any stream is waiting for acks.
virtual bool HasUnackedStreamData() const = 0;
};
} // namespace quic
#endif // QUICHE_QUIC_CORE_SESSION_NOTIFIER_INTERFACE_H_
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