passepartout-apple/Passepartout/Tunnel/PacketTunnelProvider.swift
Davide f7013a98a9
Separate App/Tunnel responsibilities (#984)
Sort out the increasing mess coming from:

- AppContext*
- Dependencies
- Shared*

by doing the following:

- Keep in the "Shared" folder only the entities actually shared by
App/Tunnel
  - Create TunnelContext
  - Move AppContext and related to the App/Context folder
  - Move TunnelContext and related to the Tunnel/Context folder
- Delete Shared+* extensions, use AppContext/TunnelContext singletons
from the app
- Create a Dependencies factory singleton to create entities in a single
place
  - Split extensions by domain
- Make it clear with `func` vs `var` when a dependency method returns a
new instance
2024-12-08 18:56:39 +01:00

106 lines
3.5 KiB
Swift

//
// PacketTunnelProvider.swift
// Passepartout
//
// Created by Davide De Rosa on 2/24/24.
// Copyright (c) 2024 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 CommonLibrary
@preconcurrency import NetworkExtension
import PassepartoutKit
final class PacketTunnelProvider: NEPacketTunnelProvider, @unchecked Sendable {
@MainActor
private let context: TunnelContext = .shared
@MainActor
private let dependencies: Dependencies = .shared
private var fwd: NEPTPForwarder?
override func startTunnel(options: [String: NSObject]? = nil) async throws {
PassepartoutConfiguration.shared.configureLogging(
to: BundleConfiguration.urlForTunnelLog,
parameters: Constants.shared.log,
logsPrivateData: UserDefaults.appGroup.bool(forKey: AppPreference.logsPrivateData.key)
)
do {
fwd = try await NEPTPForwarder(
provider: self,
decoder: dependencies.neProtocolCoder(),
registry: dependencies.registry,
environment: dependencies.tunnelEnvironment(),
profileBlock: context.processor.willStart
)
guard let fwd else {
fatalError("NEPTPForwarder nil without throwing error?")
}
try await checkEligibility(of: fwd.profile, environment: dependencies.tunnelEnvironment())
try await fwd.startTunnel(options: options)
} catch {
pp_log(.app, .fault, "Unable to start tunnel: \(error)")
PassepartoutConfiguration.shared.flushLog()
throw error
}
}
override func stopTunnel(with reason: NEProviderStopReason) async {
await fwd?.stopTunnel(with: reason)
fwd = nil
PassepartoutConfiguration.shared.flushLog()
}
override func cancelTunnelWithError(_ error: (any Error)?) {
PassepartoutConfiguration.shared.flushLog()
super.cancelTunnelWithError(error)
}
override func handleAppMessage(_ messageData: Data) async -> Data? {
await fwd?.handleAppMessage(messageData)
}
override func wake() {
fwd?.wake()
}
override func sleep() async {
await fwd?.sleep()
}
}
// MARK: - Eligibility
@MainActor
private extension PacketTunnelProvider {
func checkEligibility(of profile: Profile, environment: TunnelEnvironment) async throws {
await context.iapManager.reloadReceipt()
do {
try context.iapManager.verify(profile)
} catch {
let error = PassepartoutError(.App.ineligibleProfile)
environment.setEnvironmentValue(error.code, forKey: TunnelEnvironmentKeys.lastErrorCode)
pp_log(.app, .fault, "Verification failed for profile \(profile.id), shutting down: \(error)")
throw error
}
}
}