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/*
* Copyright © 2017-2023 WireGuard LLC. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0
*/
package com.wireguard.android.model
import android.util.Log
import androidx.databinding.BaseObservable
import androidx.databinding.Bindable
import com.wireguard.android.BR
import com.wireguard.android.backend.Dhcp
import com.wireguard.android.backend.Statistics
import com.wireguard.android.backend.Tunnel
import com.wireguard.android.databinding.Keyed
import com.wireguard.android.util.applicationScope
import com.wireguard.android.viewmodel.ConfigDetail
import com.wireguard.config.Config
import com.wireguard.config.InetEndpoint
import com.wireguard.crypto.Key;
import java.util.Optional;
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
import kotlinx.coroutines.withContext
/**
* Encapsulates the volatile and nonvolatile state of a WireGuard tunnel.
*/
class ObservableTunnel internal constructor(
private val manager: TunnelManager,
private var name: String,
config: Config?,
state: Tunnel.State
) : BaseObservable(), Keyed<String>, Tunnel {
override val key
get() = name
@Bindable
override fun getName() = name
suspend fun setNameAsync(name: String): String = withContext(Dispatchers.Main.immediate) {
if (name != this@ObservableTunnel.name)
manager.setTunnelName(this@ObservableTunnel, name)
else
this@ObservableTunnel.name
}
fun onNameChanged(name: String): String {
this.name = name
notifyPropertyChanged(BR.name)
return name
}
@get:Bindable
var state = state
private set
override fun onStateChange(newState: Tunnel.State) {
onStateChanged(newState)
}
fun onStateChanged(state: Tunnel.State): Tunnel.State {
if (state != Tunnel.State.UP) {
onStatisticsChanged(null)
onDhcpChanged(null)
onEndpointChange(null, null)
} else {
configDetail?.peers?.forEach {
var endpoint: InetEndpoint? = it.peer.endpoint.orElse(null)
it.endpoint = Optional.ofNullable(endpoint?.getResolved()?.get())
}
}
this.state = state
notifyPropertyChanged(BR.state)
return state
}
suspend fun setStateAsync(state: Tunnel.State): Tunnel.State = withContext(Dispatchers.Main.immediate) {
if (state != this@ObservableTunnel.state)
manager.setTunnelState(this@ObservableTunnel, state)
else
this@ObservableTunnel.state
}
private var configDetail: ConfigDetail? = if (config != null) ConfigDetail(config) else null
@get:Bindable
var config = config
get() {
if (field == null)
// Opportunistically fetch this if we don't have a cached one, and rely on data bindings to update it eventually
applicationScope.launch {
try {
manager.getTunnelConfig(this@ObservableTunnel)
} catch (e: Throwable) {
Log.e(TAG, Log.getStackTraceString(e))
}
}
return field
}
private set
suspend fun getConfigAsync(): Config = withContext(Dispatchers.Main.immediate) {
config ?: manager.getTunnelConfig(this@ObservableTunnel).config!!
}
suspend fun getConfigDetailAsync(): ConfigDetail = withContext(Dispatchers.Main.immediate) {
configDetail ?: manager.getTunnelConfig(this@ObservableTunnel)
}
suspend fun setConfigAsync(config: Config): Config = withContext(Dispatchers.Main.immediate) {
this@ObservableTunnel.config.let {
if (config != it)
manager.setTunnelConfig(this@ObservableTunnel, config)
else
it
}
}
fun onConfigChanged(config: Config?): ConfigDetail? {
this.config = config
this.configDetail = ConfigDetail(config)
notifyPropertyChanged(BR.config)
return configDetail
}
@get:Bindable
var statistics: Statistics? = null
get() {
if (field == null || field?.isStale != false)
// Opportunistically fetch this if we don't have a cached one, and rely on data bindings to update it eventually
applicationScope.launch {
try {
manager.getTunnelStatistics(this@ObservableTunnel)
} catch (e: Throwable) {
Log.e(TAG, Log.getStackTraceString(e))
}
}
return field
}
private set
suspend fun getStatisticsAsync(): Statistics = withContext(Dispatchers.Main.immediate) {
statistics.let {
if (it == null || it.isStale)
manager.getTunnelStatistics(this@ObservableTunnel)
else
it
}
}
fun onStatisticsChanged(statistics: Statistics?): Statistics? {
this.statistics = statistics
notifyPropertyChanged(BR.statistics)
return statistics
}
@get:Bindable
var dhcp: Dhcp? = null
private set
override fun onDhcpChange(newDhcp: Dhcp) {
onDhcpChanged(newDhcp)
}
fun onDhcpChanged(dhcp: Dhcp?): Dhcp? {
this.dhcp = dhcp
notifyPropertyChanged(BR.dhcp)
return dhcp
}
override fun onEndpointChange(publicKey: Key?, newEndpoint: InetEndpoint?) {
Log.i(TAG, "ObservableTunnel onEndpointChange " + newEndpoint)
configDetail?.peers?.forEach {
Log.i(TAG, "ObservableTunnel peer " + it + ", " + it.peer)
if (publicKey == null || it.peer.publicKey.equals(publicKey)) {
if (newEndpoint == null) {
it.endpoint = it.peer.endpoint
} else {
it.endpoint = newEndpoint.getResolved()
}
}
}
}
suspend fun deleteAsync() = manager.delete(this)
companion object {
private const val TAG = "WireGuard/ObservableTunnel"
}
}
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