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// SPDX-License-Identifier: MIT
// Copyright © 2018-2019 WireGuard LLC. All Rights Reserved.
import NetworkExtension
struct ActivateOnDemandSetting {
var isActivateOnDemandEnabled: Bool
var activateOnDemandOption: ActivateOnDemandOption
}
enum ActivateOnDemandOption {
case none // Valid only when isActivateOnDemandEnabled is false
case useOnDemandOverWiFiOnly
#if os(iOS)
case useOnDemandOverWiFiOrCellular
case useOnDemandOverCellularOnly
#elseif os(macOS)
case useOnDemandOverWiFiOrEthernet
case useOnDemandOverEthernetOnly
#else
#error("Unimplemented")
#endif
}
extension ActivateOnDemandSetting {
func apply(on tunnelProviderManager: NETunnelProviderManager) {
tunnelProviderManager.isOnDemandEnabled = isActivateOnDemandEnabled
let rules: [NEOnDemandRule]?
let connectRule = NEOnDemandRuleConnect()
let disconnectRule = NEOnDemandRuleDisconnect()
switch activateOnDemandOption {
case .none:
rules = nil
#if os(iOS)
case .useOnDemandOverWiFiOrCellular:
rules = [connectRule]
case .useOnDemandOverWiFiOnly:
connectRule.interfaceTypeMatch = .wiFi
disconnectRule.interfaceTypeMatch = .cellular
rules = [connectRule, disconnectRule]
case .useOnDemandOverCellularOnly:
connectRule.interfaceTypeMatch = .cellular
disconnectRule.interfaceTypeMatch = .wiFi
rules = [connectRule, disconnectRule]
#elseif os(macOS)
case .useOnDemandOverWiFiOrEthernet:
rules = [connectRule]
case .useOnDemandOverWiFiOnly:
connectRule.interfaceTypeMatch = .wiFi
disconnectRule.interfaceTypeMatch = .ethernet
rules = [connectRule, disconnectRule]
case .useOnDemandOverEthernetOnly:
connectRule.interfaceTypeMatch = .ethernet
disconnectRule.interfaceTypeMatch = .wiFi
rules = [connectRule, disconnectRule]
#else
#error("Unimplemented")
#endif
}
tunnelProviderManager.onDemandRules = rules
}
init(from tunnelProviderManager: NETunnelProviderManager) {
let rules = tunnelProviderManager.onDemandRules ?? []
#if os(iOS)
let otherInterfaceType: NEOnDemandRuleInterfaceType = .cellular
let useWiFiOrOtherOption: ActivateOnDemandOption = .useOnDemandOverWiFiOrCellular
let useOtherOnlyOption: ActivateOnDemandOption = .useOnDemandOverCellularOnly
#elseif os(macOS)
let otherInterfaceType: NEOnDemandRuleInterfaceType = .ethernet
let useWiFiOrOtherOption: ActivateOnDemandOption = .useOnDemandOverWiFiOrEthernet
let useOtherOnlyOption: ActivateOnDemandOption = .useOnDemandOverEthernetOnly
#else
#error("Unimplemented")
#endif
let activateOnDemandOption: ActivateOnDemandOption
switch rules.count {
case 0:
activateOnDemandOption = .none
case 1:
let rule = rules[0]
precondition(rule.action == .connect)
activateOnDemandOption = useWiFiOrOtherOption
case 2:
let connectRule = rules.first(where: { $0.action == .connect })!
let disconnectRule = rules.first(where: { $0.action == .disconnect })!
if connectRule.interfaceTypeMatch == .wiFi && disconnectRule.interfaceTypeMatch == otherInterfaceType {
activateOnDemandOption = .useOnDemandOverWiFiOnly
} else if connectRule.interfaceTypeMatch == otherInterfaceType && disconnectRule.interfaceTypeMatch == .wiFi {
activateOnDemandOption = useOtherOnlyOption
} else {
fatalError("Unexpected onDemandRules set on tunnel provider manager")
}
default:
fatalError("Unexpected number of onDemandRules set on tunnel provider manager")
}
self.activateOnDemandOption = activateOnDemandOption
if activateOnDemandOption == .none {
isActivateOnDemandEnabled = false
} else {
isActivateOnDemandEnabled = tunnelProviderManager.isOnDemandEnabled
}
}
}
extension ActivateOnDemandSetting {
static var defaultSetting = ActivateOnDemandSetting(isActivateOnDemandEnabled: false, activateOnDemandOption: .none)
}
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