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/*
* Copyright © 2018 Samuel Holland <samuel@sholland.org>
* Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
* SPDX-License-Identifier: GPL-2.0-or-later
*/
package com.wireguard.android.backend;
import com.wireguard.android.model.Tunnel;
import com.wireguard.android.model.Tunnel.State;
import com.wireguard.android.model.Tunnel.Statistics;
import com.wireguard.config.Config;
import java.util.Set;
/**
* Interface for implementations of the WireGuard secure network tunnel.
*/
public interface Backend {
/**
* Update the volatile configuration of a running tunnel and return the resulting configuration.
* If the tunnel is not up, return the configuration that would result (if known), or else
* simply return the given configuration.
*
* @param tunnel The tunnel to apply the configuration to.
* @param config The new configuration for this tunnel.
* @return The updated configuration of the tunnel.
*/
Config applyConfig(Tunnel tunnel, Config config) throws Exception;
/**
* Enumerate the names of currently-running tunnels.
*
* @return The set of running tunnel names.
*/
Set<String> enumerate();
/**
* Get the actual state of a tunnel.
*
* @param tunnel The tunnel to examine the state of.
* @return The state of the tunnel.
*/
State getState(Tunnel tunnel) throws Exception;
/**
* Get statistics about traffic and errors on this tunnel. If the tunnel is not running, the
* statistics object will be filled with zero values.
*
* @param tunnel The tunnel to retrieve statistics for.
* @return The statistics for the tunnel.
*/
Statistics getStatistics(Tunnel tunnel) throws Exception;
/**
* Set the state of a tunnel.
*
* @param tunnel The tunnel to control the state of.
* @param state The new state for this tunnel. Must be {@code UP}, {@code DOWN}, or
* {@code TOGGLE}.
* @return The updated state of the tunnel.
*/
State setState(Tunnel tunnel, State state) throws Exception;
}
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