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TunnelsTracker.swift
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TunnelsTracker.swift
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// SPDX-License-Identifier: MIT
// Copyright © 2018-2021 WireGuard LLC. All Rights Reserved.
// Keeps track of tunnels and informs the following objects of changes in tunnels:
// - WgService
import Foundation
import Combine
class TunnelsTracker {
private var tunnelsManager: TunnelsManager
private var tunnelStatusObservers = [AnyObject]()
private(set) var currentTunnel: TunnelContainer? {
didSet {
}
}
var onTunnelState = { (status: VpnStatus) in }
init(tunnelsManager: TunnelsManager) {
self.tunnelsManager = tunnelsManager
currentTunnel = tunnelsManager.tunnelInOperation()
for index in 0 ..< tunnelsManager.numberOfTunnels() {
let tunnel = tunnelsManager.tunnel(at: index)
let statusObservationToken = observeStatus(of: tunnel)
tunnelStatusObservers.insert(statusObservationToken, at: index)
}
tunnelsManager.tunnelsListDelegate = self
tunnelsManager.activationDelegate = self
}
func observeStatus(of tunnel: TunnelContainer) -> AnyObject {
return tunnel.observe(\.status) { [weak self] tunnel, _ in
guard let self = self else { return }
if tunnel.status == .deactivating || tunnel.status == .inactive {
if self.currentTunnel == tunnel {
self.currentTunnel = self.tunnelsManager.tunnelInOperation()
}
} else {
self.currentTunnel = tunnel
}
}
}
func triggerCurrentStatus() {
if let status = currentTunnel?.status {
switch(status) {
case .activating:
onTunnelState(VpnStatus.reconfiguring)
case .deactivating:
onTunnelState(VpnStatus.reconfiguring)
case .reasserting:
onTunnelState(VpnStatus.reconfiguring)
case .restarting:
onTunnelState(VpnStatus.reconfiguring)
case .waiting:
onTunnelState(VpnStatus.reconfiguring)
case .inactive:
onTunnelState(VpnStatus.deactivated)
case .active:
onTunnelState(VpnStatus.activated)
}
} else {
onTunnelState(VpnStatus.deactivated) // TODO: should be unknown?
}
}
}
extension TunnelsTracker: TunnelsManagerActivationDelegate {
func tunnelActivationAttemptFailed(tunnel: TunnelContainer, error: TunnelsManagerActivationAttemptError) {
// switch (error) {
// case .tunnelIsNotInactive:
// BlockaLogger.v("TunnelsTracker", "tun: \(tunnel.name), is active")
// onTunnelState(.activated)
// default:
// BlockaLogger.e("TunnelsTracker", "tun: \(tunnel.name), activation attempt fail: \(error)")
// onTunnelState(.deactivated)
// }
}
func tunnelActivationAttemptSucceeded(tunnel: TunnelContainer) {
// BlockaLogger.v("TunnelsTracker", "tun: \(tunnel.name), activation attempt succeeded")
// onTunnelState(.activated)
}
func tunnelActivationFailed(tunnel: TunnelContainer, error: TunnelsManagerActivationError) {
BlockaLogger.e("TunnelsTracker", "tun: \(tunnel.name), activation fail: \(error)")
onTunnelState(.deactivated)
}
func tunnelActivationSucceeded(tunnel: TunnelContainer) {
BlockaLogger.v("TunnelsTracker", "tun: \(tunnel.name), activation succeeded")
onTunnelState(.activated)
}
func tunnelDeactivated(tunnel: TunnelContainer) {
BlockaLogger.v("TunnelsTracker", "tun: \(tunnel.name), deactivated")
onTunnelState(.deactivated)
}
}
extension TunnelsTracker: TunnelsManagerListDelegate {
func tunnelAdded(at index: Int) {
let tunnel = tunnelsManager.tunnel(at: index)
if tunnel.status != .deactivating && tunnel.status != .inactive {
self.currentTunnel = tunnel
}
let statusObservationToken = observeStatus(of: tunnel)
tunnelStatusObservers.insert(statusObservationToken, at: index)
// nothing for now
}
func tunnelModified(at index: Int) {
// nothing for now
}
func tunnelMoved(from oldIndex: Int, to newIndex: Int) {
let statusObserver = tunnelStatusObservers.remove(at: oldIndex)
tunnelStatusObservers.insert(statusObserver, at: newIndex)
// nothing for now
}
func tunnelRemoved(at index: Int, tunnel: TunnelContainer) {
tunnelStatusObservers.remove(at: index)
// nothing for now
}
}