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// SPDX-License-Identifier: MIT
// Copyright © 2018 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 useOnDemandOverWiFiOrCellular
case useOnDemandOverWiFiOnly
case useOnDemandOverCellularOnly
}
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
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]
}
tunnelProviderManager.onDemandRules = rules
}
init(from tunnelProviderManager: NETunnelProviderManager) {
let rules = tunnelProviderManager.onDemandRules ?? []
let activateOnDemandOption: ActivateOnDemandOption
switch rules.count {
case 0:
activateOnDemandOption = .none
case 1:
let rule = rules[0]
precondition(rule.action == .connect)
activateOnDemandOption = .useOnDemandOverWiFiOrCellular
case 2:
let connectRule = rules.first(where: { $0.action == .connect })!
let disconnectRule = rules.first(where: { $0.action == .disconnect })!
if connectRule.interfaceTypeMatch == .wiFi && disconnectRule.interfaceTypeMatch == .cellular {
activateOnDemandOption = .useOnDemandOverWiFiOnly
} else if connectRule.interfaceTypeMatch == .cellular && disconnectRule.interfaceTypeMatch == .wiFi {
activateOnDemandOption = .useOnDemandOverCellularOnly
} 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 {
self.isActivateOnDemandEnabled = false
} else {
self.isActivateOnDemandEnabled = tunnelProviderManager.isOnDemandEnabled
}
}
}
extension ActivateOnDemandSetting {
static var defaultSetting = ActivateOnDemandSetting(isActivateOnDemandEnabled: false, activateOnDemandOption: .none)
}
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