gfe-relnote: Default-initialize QUIC BBRv2 loss event threshold for exiting STARTUP from a flag. Protected by --gfe2_reloadable_flag_quic_default_to_bbr_v2.
PiperOrigin-RevId: 264298542
Change-Id: I304ab19e4820dec51d3f8ef53762a393f6b175fd
diff --git a/quic/qbone/bonnet/tun_device_interface.h b/quic/qbone/bonnet/tun_device_interface.h
new file mode 100644
index 0000000..e99c547
--- /dev/null
+++ b/quic/qbone/bonnet/tun_device_interface.h
@@ -0,0 +1,33 @@
+// 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.
+
+#ifndef QUICHE_QUIC_QBONE_BONNET_TUN_DEVICE_INTERFACE_H_
+#define QUICHE_QUIC_QBONE_BONNET_TUN_DEVICE_INTERFACE_H_
+
+#include <vector>
+
+namespace quic {
+
+// An interface with methods for interacting with a TUN device.
+class TunDeviceInterface {
+ public:
+ virtual ~TunDeviceInterface() {}
+
+ // 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;
+
+ // 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
+
+#endif // QUICHE_QUIC_QBONE_BONNET_TUN_DEVICE_INTERFACE_H_
