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Neil Alexander
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312
Yggdrasil Network iOS/View Controllers/PeersViewController.swift
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312
Yggdrasil Network iOS/View Controllers/PeersViewController.swift
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//
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// PeersViewController.swift
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// YggdrasilNetwork
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//
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// Created by Neil Alexander on 07/01/2019.
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//
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import UIKit
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import NetworkExtension
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import CoreTelephony
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class PeersViewController: UITableViewController {
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var app = UIApplication.shared.delegate as! AppDelegate
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var config: [String: Any]? = nil
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@IBOutlet var peerTable: UITableView!
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@IBOutlet weak var addButtonItem: UIBarButtonItem!
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override func viewDidLoad() {
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super.viewDidLoad()
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if let proto = self.app.vpnManager.protocolConfiguration as? NETunnelProviderProtocol {
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config = proto.providerConfiguration ?? nil
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}
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self.navigationItem.rightBarButtonItems = [
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self.editButtonItem,
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self.addButtonItem
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]
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}
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override func viewWillAppear(_ animated: Bool) {
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NotificationCenter.default.addObserver(self, selector: #selector(self.onYggdrasilPeersUpdated), name: NSNotification.Name.YggdrasilPeersUpdated, object: nil)
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}
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override func viewWillDisappear(_ animated: Bool) {
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NotificationCenter.default.removeObserver(self, name: NSNotification.Name.YggdrasilPeersUpdated, object: nil)
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}
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@objc func onYggdrasilPeersUpdated(notification: NSNotification) {
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peerTable.reloadData()
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}
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// MARK: - Table view data source
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override func numberOfSections(in tableView: UITableView) -> Int {
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return 3
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}
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override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
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switch section {
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case 0: return app.yggdrasilSwitchPeers.count
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case 1:
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if let config = self.app.yggdrasilConfig {
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if let peers = config.get("Peers") as? [String] {
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return peers.count
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}
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}
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return 0
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case 2:
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if UIDevice.current.hasCellularCapabilites {
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return 3
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}
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return 2
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default: return 0
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}
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}
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override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
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switch indexPath.section {
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case 0:
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let cell = tableView.dequeueReusableCell(withIdentifier: "discoveredPeerPrototype", for: indexPath)
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let peers = app.yggdrasilSwitchPeers.sorted { (a, b) -> Bool in
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return (a["Port"] as! Int) < (b["Port"] as! Int)
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}
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if indexPath.row < peers.count {
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let value = peers[indexPath.row]
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let proto = value["Protocol"] as? String ?? "tcp"
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let sent = value["BytesSent"] as? Double ?? 0
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let recvd = value["BytesRecvd"] as? Double ?? 0
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let rx = self.format(bytes: sent)
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let tx = self.format(bytes: recvd)
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cell.textLabel?.text = "\(value["Endpoint"] ?? "unknown")"
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cell.detailTextLabel?.text = "\(proto.uppercased()) peer on port \(value["Port"] ?? "unknown"), sent \(tx), received \(rx)"
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}
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return cell
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case 1:
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let cell = tableView.dequeueReusableCell(withIdentifier: "configuredPeerPrototype", for: indexPath)
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if let config = self.app.yggdrasilConfig {
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if let peers = config.get("Peers") as? [String] {
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cell.textLabel?.text = peers[indexPath.last!]
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} else {
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cell.textLabel?.text = "(unknown)"
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}
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}
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return cell
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case 2:
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switch indexPath.last {
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case 0:
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let cell = tableView.dequeueReusableCell(withIdentifier: "togglePrototype", for: indexPath) as! ToggleTableViewCell
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cell.isUserInteractionEnabled = true
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cell.label?.text = "Search for multicast peers"
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cell.label?.isEnabled = true
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cell.toggle?.addTarget(self, action: #selector(toggledMulticast), for: .valueChanged)
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cell.toggle?.isEnabled = true
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if let config = self.app.yggdrasilConfig {
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let interfaces = config.get("MulticastInterfaces") as? [String] ?? []
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cell.toggle?.isOn = interfaces.contains("en*")
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}
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return cell
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case 1:
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let cell = tableView.dequeueReusableCell(withIdentifier: "togglePrototype", for: indexPath) as! ToggleTableViewCell
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cell.isUserInteractionEnabled = false
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cell.label?.text = "Search for nearby iOS peers"
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cell.label?.isEnabled = false
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cell.toggle?.addTarget(self, action: #selector(toggledAWDL), for: .valueChanged)
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cell.toggle?.setOn(false, animated: false)
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cell.toggle?.isEnabled = false
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/*if let config = self.app.yggdrasilConfig {
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let interfaces = config.get("MulticastInterfaces") as? [String] ?? []
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cell.toggle?.isOn = interfaces.contains("awdl0")
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}*/
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return cell
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case 2:
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let cell = tableView.dequeueReusableCell(withIdentifier: "menuPrototype", for: indexPath)
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cell.isUserInteractionEnabled = true
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cell.textLabel?.text = "Device settings"
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cell.textLabel?.isEnabled = true
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return cell
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default:
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let cell = tableView.dequeueReusableCell(withIdentifier: "menuPrototype", for: indexPath)
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cell.isUserInteractionEnabled = false
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cell.textLabel?.text = "Unknown"
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cell.textLabel?.isEnabled = true
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return cell
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}
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default:
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let cell = tableView.dequeueReusableCell(withIdentifier: "configuredPeerPrototype", for: indexPath)
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cell.textLabel?.text = "(unknown)"
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return cell
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}
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}
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func format(bytes: Double) -> String {
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guard bytes > 0 else {
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return "0 bytes"
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}
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// Adapted from http://stackoverflow.com/a/18650828
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let suffixes = ["bytes", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"]
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let k: Double = 1000
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let i = floor(log(bytes) / log(k))
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// Format number with thousands separator and everything below 1 GB with no decimal places.
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let numberFormatter = NumberFormatter()
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numberFormatter.maximumFractionDigits = i < 3 ? 0 : 1
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numberFormatter.numberStyle = .decimal
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let numberString = numberFormatter.string(from: NSNumber(value: bytes / pow(k, i))) ?? "Unknown"
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let suffix = suffixes[Int(i)]
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return "\(numberString) \(suffix)"
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}
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@objc func toggledMulticast(_ sender: UISwitch) {
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if let config = self.app.yggdrasilConfig {
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var interfaces = config.get("MulticastInterfaces") as! [String]
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if sender.isOn {
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interfaces.append("en*")
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} else {
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interfaces.removeAll(where: { $0 == "en*" })
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}
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config.set("MulticastInterfaces", to: interfaces as [String])
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try? config.save(to: &app.vpnManager)
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}
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}
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@objc func toggledAWDL(_ sender: UISwitch) {
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if let config = self.app.yggdrasilConfig {
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var interfaces = config.get("MulticastInterfaces") as! [String]
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if sender.isOn {
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interfaces.append("awdl0")
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} else {
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interfaces.removeAll(where: { $0 == "awdl0" })
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}
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config.set("MulticastInterfaces", to: interfaces as [String])
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try? config.save(to: &app.vpnManager)
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}
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}
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override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
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switch section {
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case 0:
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if self.app.yggdrasilPeers.count > 0 {
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return "Connected Peers"
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}
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return "No peers currently connected"
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case 1:
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if let config = self.app.yggdrasilConfig {
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if let peers = config.get("Peers") as? [String] {
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if peers.count > 0 {
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return "Configured Peers"
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}
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}
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}
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return "No peers currently configured"
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case 2:
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return "Peer Connectivity"
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default: return "(Unknown)"
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}
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}
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override func tableView(_ tableView: UITableView, titleForFooterInSection section: Int) -> String? {
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switch section {
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case 1:
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return "Yggdrasil will automatically attempt to connect to configured peers when started."
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case 2:
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var str = "Multicast peers will be discovered on the same Wi-Fi network or via USB."
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if UIDevice.current.hasCellularCapabilites {
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str += " Data charges may apply when using mobile data. You can prevent mobile data usage in the device settings."
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}
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return str
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default: return nil
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}
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}
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override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
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return indexPath.first == 1
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}
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override func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? {
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switch indexPath.first {
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case 0:
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return [UITableViewRowAction(style: UITableViewRowAction.Style.default, title: "Disconnect", handler: { (action, index) in
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})]
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case 1:
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return [UITableViewRowAction(style: UITableViewRowAction.Style.normal, title: "Remove", handler: { (action, index) in
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print(action, index)
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if let config = self.app.yggdrasilConfig {
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config.remove(index: index.last!, from: "Peers")
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do {
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try config.save(to: &self.app.vpnManager)
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tableView.reloadSections(IndexSet(integer: 1), with: UITableView.RowAnimation.automatic)
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} catch {
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let alert = UIAlertController(title: "Error", message: error.localizedDescription, preferredStyle: .alert)
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alert.addAction(UIAlertAction(title: "OK", style: .cancel, handler: nil))
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self.parent?.present(alert, animated: true, completion: nil)
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print("Error removing: \(error)")
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}
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}
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})]
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default:
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return []
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}
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}
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override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
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switch indexPath.first {
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case 2:
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if let last = indexPath.last, last == 2 {
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UIApplication.shared.open(NSURL(string:UIApplication.openSettingsURLString)! as URL, options: [:]) { (result) in
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NSLog("Result " + result.description)
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}
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}
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default:
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break
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}
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tableView.deselectRow(at: indexPath, animated: true)
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}
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@IBAction func addNewPeerButtonPressed(_ sender: UIBarButtonItem) {
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let alert = UIAlertController(title: "Add Configured Peer", message: """
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Enter the full URI of the peer to add. Yggdrasil will automatically connect to this peer when started.
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""", preferredStyle: UIAlertController.Style.alert)
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let action = UIAlertAction(title: "Add", style: .default) { (alertAction) in
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let textField = alert.textFields![0] as UITextField
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if let text = textField.text?.trimmingCharacters(in: .whitespacesAndNewlines) {
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if let config = self.app.yggdrasilConfig {
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if let peers = config.get("Peers") as? [String], !peers.contains(text) {
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config.add(text, in: "Peers")
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do {
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try config.save(to: &self.app.vpnManager)
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if let index = config.get("Peers") as? [String] {
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self.peerTable.insertRows(at: [IndexPath(indexes: [1, index.count-1])], with: .automatic)
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self.peerTable.reloadSections(IndexSet(integer: 1), with: UITableView.RowAnimation.automatic)
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}
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} catch {
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let alert = UIAlertController(title: "Error", message: error.localizedDescription, preferredStyle: .alert)
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alert.addAction(UIAlertAction(title: "OK", style: .cancel, handler: nil))
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self.parent?.present(alert, animated: true, completion: nil)
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print("Add error: \(error)")
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}
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} else {
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let alert = UIAlertController(title: "Error", message: "Peer already exists", preferredStyle: .alert)
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alert.addAction(UIAlertAction(title: "OK", style: .cancel, handler: nil))
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self.parent?.present(alert, animated: true, completion: nil)
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}
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}
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}
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}
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let cancel = UIAlertAction(title: "Cancel", style: .cancel)
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alert.addTextField { (textField) in
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textField.placeholder = "tcp://hostname:port"
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}
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alert.addAction(action)
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alert.addAction(cancel)
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self.present(alert, animated: true, completion: nil)
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}
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}
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