79 lines
2.2 KiB
Swift
79 lines
2.2 KiB
Swift
//
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// InterfaceObserver.swift
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// TunnelKit
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//
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// Created by Davide De Rosa on 6/14/17.
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// Copyright © 2018 London Trust Media. All rights reserved.
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//
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import Foundation
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import SystemConfiguration.CaptiveNetwork
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import SwiftyBeaver
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private let log = SwiftyBeaver.self
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extension NSNotification.Name {
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static let __InterfaceObserverDidDetectWifiChange = NSNotification.Name("__InterfaceObserverDidDetectWifiChange")
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}
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class InterfaceObserver: NSObject {
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private var queue: DispatchQueue?
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private var timer: DispatchSourceTimer?
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private var lastWifiName: String?
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func start(queue: DispatchQueue) {
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self.queue = queue
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let timer = DispatchSource.makeTimerSource(flags: DispatchSource.TimerFlags(rawValue: UInt(0)), queue: queue)
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timer.schedule(deadline: .now(), repeating: .seconds(2))
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timer.setEventHandler {
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self.fireWifiChangeObserver()
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}
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timer.resume()
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self.timer = timer
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}
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func stop() {
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timer?.cancel()
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timer = nil
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queue = nil
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}
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private func fireWifiChangeObserver() {
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let currentWifiName = currentWifiNetworkName()
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if (currentWifiName != lastWifiName) {
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if let current = currentWifiName {
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log.debug("SSID is now '\(current)'")
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if let last = lastWifiName, (current != last) {
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queue?.async {
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NotificationCenter.default.post(name: .__InterfaceObserverDidDetectWifiChange, object: nil)
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}
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}
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} else {
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log.debug("SSID is null")
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}
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}
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lastWifiName = currentWifiName
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}
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func currentWifiNetworkName() -> String? {
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#if os(iOS)
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guard let interfaceNames = CNCopySupportedInterfaces() as? [CFString] else {
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return nil
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}
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for name in interfaceNames {
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guard let iface = CNCopyCurrentNetworkInfo(name) as? [String: Any] else {
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continue
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}
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if let ssid = iface["SSID"] as? String {
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return ssid
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}
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}
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#endif
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return nil
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}
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}
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