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//
// TunnelSettings.swift
// MullvadVPN
//
// Created by Marco Nikic on 2023-07-31.
// Copyright © 2025 Mullvad VPN AB. All rights reserved.
//
import Foundation
/// Alias to the latest version of the `TunnelSettings`.
public typealias LatestTunnelSettings = TunnelSettingsV7
/// Protocol all TunnelSettings must adhere to, for upgrade purposes.
public protocol TunnelSettings: Codable, Sendable {
func upgradeToNextVersion() -> any TunnelSettings
}
/// Settings and device state schema versions.
public enum SchemaVersion: Int, Equatable, Sendable {
/// Legacy settings format, stored as `TunnelSettingsV1`.
case v1 = 1
/// New settings format, stored as `TunnelSettingsV2`.
case v2 = 2
/// V2 format with WireGuard obfuscation options, stored as `TunnelSettingsV3`.
case v3 = 3
/// V3 format with post quantum options, stored as `TunnelSettingsV4`.
case v4 = 4
/// V4 format with multi-hop options, stored as `TunnelSettingsV5`.
case v5 = 5
/// V5 format with DAITA settings, stored as `TunnelSettingsV6`.
case v6 = 6
/// V6 format with Local network sharing, stored as `TunnelSettingsV7`.
case v7 = 7
var settingsType: any TunnelSettings.Type {
switch self {
case .v1: return TunnelSettingsV1.self
case .v2: return TunnelSettingsV2.self
case .v3: return TunnelSettingsV3.self
case .v4: return TunnelSettingsV4.self
case .v5: return TunnelSettingsV5.self
case .v6: return TunnelSettingsV6.self
case .v7: return TunnelSettingsV7.self
}
}
var nextVersion: Self {
switch self {
case .v1: return .v2
case .v2: return .v3
case .v3: return .v4
case .v4: return .v5
case .v5: return .v6
case .v6: return .v7
case .v7: return .v7
}
}
/// Current schema version.
public static let current = SchemaVersion.v7
}
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