passepartout-apple/Passepartout-iOS/Scenes/ConfigurationViewController.swift
2019-11-20 19:21:38 +01:00

458 lines
15 KiB
Swift

//
// ConfigurationViewController.swift
// Passepartout-iOS
//
// Created by Davide De Rosa on 9/2/18.
// Copyright (c) 2019 Davide De Rosa. All rights reserved.
//
// https://github.com/passepartoutvpn
//
// This file is part of Passepartout.
//
// Passepartout is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Passepartout is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Passepartout. If not, see <http://www.gnu.org/licenses/>.
//
import UIKit
import TunnelKit
import SwiftyBeaver
import PassepartoutCore
import Convenience
private let log = SwiftyBeaver.self
class ConfigurationViewController: UIViewController, StrongTableHost {
@IBOutlet private weak var tableView: UITableView!
private lazy var itemRefresh = UIBarButtonItem(barButtonSystemItem: .refresh, target: self, action: #selector(refresh))
var initialConfiguration: OpenVPN.Configuration!
private lazy var configuration: OpenVPN.ConfigurationBuilder = initialConfiguration.builder()
var originalConfigurationURL: URL?
private var isEditable: Bool {
return originalConfigurationURL != nil
}
var isServerPushed = false
weak var delegate: ConfigurationModificationDelegate?
// MARK: StrongTableHost
let model: StrongTableModel<SectionType, RowType> = StrongTableModel()
func reloadModel() {
model.clear()
// sections
model.add(.communication)
model.add(.compression)
if isEditable {
model.add(.reset)
}
if !isServerPushed {
model.add(.tls)
}
model.add(.other)
// headers
model.setHeader(L10n.Core.Configuration.Sections.Communication.header, forSection: .communication)
model.setHeader(L10n.Core.Configuration.Sections.Tls.header, forSection: .tls)
model.setHeader(L10n.Core.Configuration.Sections.Compression.header, forSection: .compression)
model.setHeader(L10n.Core.Configuration.Sections.Other.header, forSection: .other)
// footers
if isEditable {
model.setFooter(L10n.Core.Configuration.Sections.Reset.footer, forSection: .reset)
}
// rows
if isServerPushed {
var rows: [RowType]
rows = []
if let _ = configuration.cipher {
rows.append(.cipher)
}
if let _ = configuration.digest {
rows.append(.digest)
}
model.set(rows, forSection: .communication)
rows = []
if let _ = configuration.compressionFraming {
rows.append(.compressionFraming)
}
if let _ = configuration.compressionAlgorithm {
rows.append(.compressionAlgorithm)
}
model.set(rows, forSection: .compression)
rows = []
if let _ = configuration.keepAliveInterval {
rows.append(.keepAlive)
}
if let _ = configuration.renegotiatesAfter {
rows.append(.renegSeconds)
}
if let _ = configuration.randomizeEndpoint {
rows.append(.randomEndpoint)
}
model.set(rows, forSection: .other)
} else {
model.set([.cipher, .digest], forSection: .communication)
model.set([.compressionFraming, .compressionAlgorithm], forSection: .compression)
model.set([.keepAlive, .renegSeconds, .randomEndpoint], forSection: .other)
}
if isEditable {
model.set([.resetOriginal], forSection: .reset)
}
model.set([.client, .tlsWrapping, .eku], forSection: .tls)
}
// MARK: UIViewController
override func viewDidLoad() {
super.viewDidLoad()
guard let _ = initialConfiguration else {
fatalError("Initial configuration not set")
}
reloadModel()
guard isEditable else {
tableView.allowsSelection = false
return
}
itemRefresh.isEnabled = false
navigationItem.rightBarButtonItem = itemRefresh
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
if let ip = tableView.indexPathForSelectedRow {
tableView.deselectRow(at: ip, animated: true)
}
}
// MARK: Actions
private func resetOriginalConfiguration() {
guard let originalURL = originalConfigurationURL else {
log.warning("Resetting with no original configuration set? Bad table model?")
return
}
let parsingResult: OpenVPN.ConfigurationParser.Result
do {
parsingResult = try OpenVPN.ConfigurationParser.parsed(fromURL: originalURL)
} catch let e {
log.error("Could not parse original configuration: \(e)")
return
}
configuration = parsingResult.configuration.builder()
itemRefresh.isEnabled = !configuration.canCommunicate(with: initialConfiguration)
initialConfiguration = parsingResult.configuration
tableView.reloadData()
delegate?.configuration(didUpdate: initialConfiguration)
}
@IBAction private func refresh() {
guard isEditable else {
return
}
initialConfiguration = configuration.build()
itemRefresh.isEnabled = false
delegate?.configurationShouldReinstall()
}
}
// MARK: -
extension ConfigurationViewController: UITableViewDataSource, UITableViewDelegate {
enum SectionType: Int {
case communication
case reset
case tls
case compression
case network
case other
}
enum RowType: Int {
case cipher
case digest
case resetOriginal
case client
case tlsWrapping
case eku
case compressionFraming
case compressionAlgorithm
case keepAlive
case renegSeconds
case randomEndpoint
}
func numberOfSections(in tableView: UITableView) -> Int {
return model.numberOfSections
}
func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
return model.header(forSection: section)
}
func tableView(_ tableView: UITableView, titleForFooterInSection section: Int) -> String? {
return model.footer(forSection: section)
}
func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
return model.headerHeight(for: section)
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return model.numberOfRows(forSection: section)
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let row = model.row(at: indexPath)
let V = L10n.Core.Configuration.Cells.self
let cell = Cells.setting.dequeue(from: tableView, for: indexPath)
if !isEditable {
cell.accessoryType = .none
}
cell.isTappable = isEditable
switch row {
case .cipher:
cell.leftText = V.Cipher.caption
cell.rightText = configuration.fallbackCipher.description
case .digest:
cell.leftText = V.Digest.caption
cell.rightText = configuration.fallbackDigest.description
case .compressionFraming:
cell.leftText = V.CompressionFraming.caption
cell.rightText = configuration.fallbackCompressionFraming.cellDescription
case .compressionAlgorithm:
cell.leftText = V.CompressionAlgorithm.caption
if let compressionAlgorithm = configuration.compressionAlgorithm {
cell.rightText = compressionAlgorithm.cellDescription
} else {
cell.rightText = L10n.Core.Global.Values.disabled
}
cell.isTappable = (configuration.compressionFraming != .disabled)
case .resetOriginal:
cell.leftText = V.ResetOriginal.caption
cell.applyAction(.current)
case .client:
cell.leftText = V.Client.caption
cell.rightText = (configuration.clientCertificate != nil) ? V.Client.Value.enabled : V.Client.Value.disabled
cell.accessoryType = .none
cell.isTappable = false
case .tlsWrapping:
cell.leftText = V.TlsWrapping.caption
if let strategy = configuration.tlsWrap?.strategy {
switch strategy {
case .auth:
cell.rightText = V.TlsWrapping.Value.auth
case .crypt:
cell.rightText = V.TlsWrapping.Value.crypt
}
} else {
cell.rightText = L10n.Core.Global.Values.disabled
}
cell.accessoryType = .none
cell.isTappable = false
case .eku:
cell.leftText = V.Eku.caption
cell.rightText = (configuration.checksEKU ?? false) ? L10n.Core.Global.Values.enabled : L10n.Core.Global.Values.disabled
cell.accessoryType = .none
cell.isTappable = false
case .keepAlive:
cell.leftText = V.KeepAlive.caption
if let keepAlive = configuration.keepAliveInterval, keepAlive > 0 {
cell.rightText = V.KeepAlive.Value.seconds(Int(keepAlive))
} else {
cell.rightText = L10n.Core.Global.Values.disabled
}
cell.accessoryType = .none
cell.isTappable = false
case .renegSeconds:
cell.leftText = V.RenegotiationSeconds.caption
if let reneg = configuration.renegotiatesAfter, reneg > 0 {
cell.rightText = V.RenegotiationSeconds.Value.after(TimeInterval(reneg).localized)
} else {
cell.rightText = L10n.Core.Global.Values.disabled
}
cell.accessoryType = .none
cell.isTappable = false
case .randomEndpoint:
cell.leftText = V.RandomEndpoint.caption
cell.rightText = (configuration.randomizeEndpoint ?? false) ? L10n.Core.Global.Values.enabled : L10n.Core.Global.Values.disabled
cell.accessoryType = .none
cell.isTappable = false
}
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
guard isEditable else {
fatalError("Table should not allow selection when isEditable is false")
}
let settingCell = tableView.cellForRow(at: indexPath) as? SettingTableViewCell
switch model.row(at: indexPath) {
case .cipher:
let vc = SingleOptionViewController<OpenVPN.Cipher>()
vc.applyTint(.current)
vc.title = settingCell?.leftText
vc.options = OpenVPN.Cipher.available
vc.selectedOption = configuration.cipher
vc.descriptionBlock = { $0.description }
vc.selectionBlock = { [weak self] in
self?.configuration.cipher = $0
self?.popAndCheckRefresh()
}
navigationController?.pushViewController(vc, animated: true)
case .digest:
let vc = SingleOptionViewController<OpenVPN.Digest>()
vc.applyTint(.current)
vc.title = settingCell?.leftText
vc.options = OpenVPN.Digest.available
vc.selectedOption = configuration.digest
vc.descriptionBlock = { $0.description }
vc.selectionBlock = { [weak self] in
self?.configuration.digest = $0
self?.popAndCheckRefresh()
}
navigationController?.pushViewController(vc, animated: true)
case .compressionFraming:
let vc = SingleOptionViewController<OpenVPN.CompressionFraming>()
vc.applyTint(.current)
vc.title = settingCell?.leftText
vc.options = OpenVPN.CompressionFraming.available
vc.selectedOption = configuration.compressionFraming ?? .disabled
vc.descriptionBlock = { $0.cellDescription }
vc.selectionBlock = { [weak self] in
self?.configuration.compressionFraming = $0
if $0 == .disabled {
self?.configuration.compressionAlgorithm = .disabled
}
self?.popAndCheckRefresh()
}
navigationController?.pushViewController(vc, animated: true)
case .compressionAlgorithm:
guard configuration.compressionFraming != .disabled else {
return
}
let vc = SingleOptionViewController<OpenVPN.CompressionAlgorithm>()
vc.applyTint(.current)
vc.title = settingCell?.leftText
vc.options = OpenVPN.CompressionAlgorithm.available
vc.selectedOption = configuration.compressionAlgorithm ?? .disabled
vc.descriptionBlock = { $0.cellDescription }
vc.selectionBlock = { [weak self] in
self?.configuration.compressionAlgorithm = $0
self?.popAndCheckRefresh()
}
navigationController?.pushViewController(vc, animated: true)
case .resetOriginal:
tableView.deselectRow(at: indexPath, animated: true)
resetOriginalConfiguration()
default:
break
}
}
// MARK: Helpers
private func popAndCheckRefresh() {
itemRefresh.isEnabled = !configuration.canCommunicate(with: initialConfiguration)
tableView.reloadData()
navigationController?.popViewController(animated: true)
delegate?.configuration(didUpdate: configuration.build())
}
}
// MARK: -
private extension OpenVPN.CompressionFraming {
var cellDescription: String {
let V = L10n.Core.Configuration.Cells.self
switch self {
case .disabled:
return L10n.Core.Global.Values.disabled
case .compLZO:
return V.CompressionFraming.Value.lzo
case .compress:
return V.CompressionFraming.Value.compress
}
}
}
private extension OpenVPN.CompressionAlgorithm {
var cellDescription: String {
let V = L10n.Core.Configuration.Cells.self
switch self {
case .disabled:
return L10n.Core.Global.Values.disabled
case .LZO:
return V.CompressionAlgorithm.Value.lzo
case .other:
return V.CompressionAlgorithm.Value.other
}
}
}