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// Copyright (c) 2019 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.
#include <vector>
namespace quic {
// An interface with methods for interacting with a TUN device.
class TunDeviceInterface {
virtual ~TunDeviceInterface() = default;
// Actually creates/reopens and configures the device.
virtual bool Init() = 0;
// Marks the interface up to start receiving packets.
virtual bool Up() = 0;
// Marks the interface down to stop receiving packets.
virtual bool Down() = 0;
// Closes the open file descriptor for the TUN device (if one exists).
// It is safe to reinitialize and reuse this TunTapDevice after calling
// CloseDevice.
virtual void CloseDevice() = 0;
// Gets the file descriptor that can be used to send/receive packets.
// This returns -1 when the TUN device is in an invalid state.
virtual int GetFileDescriptor() const = 0;
} // namespace quic