1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
// SPDX-License-Identifier: MIT
// Copyright © 2018-2020 WireGuard LLC. All Rights Reserved.
import NetworkExtension
enum ActivateOnDemandOption: Equatable {
case off
case wiFiInterfaceOnly(ActivateOnDemandSSIDOption)
case nonWiFiInterfaceOnly
case anyInterface(ActivateOnDemandSSIDOption)
}
#if os(iOS)
private let nonWiFiInterfaceType: NEOnDemandRuleInterfaceType = .cellular
#elseif os(macOS)
private let nonWiFiInterfaceType: NEOnDemandRuleInterfaceType = .ethernet
#else
#error("Unimplemented")
#endif
enum ActivateOnDemandSSIDOption: Equatable {
case anySSID
case onlySpecificSSIDs([String])
case exceptSpecificSSIDs([String])
}
extension ActivateOnDemandOption {
func apply(on tunnelProviderManager: NETunnelProviderManager) {
let rules: [NEOnDemandRule]?
switch self {
case .off:
rules = nil
case .wiFiInterfaceOnly(let ssidOption):
rules = ssidOnDemandRules(option: ssidOption) + [NEOnDemandRuleDisconnect(interfaceType: nonWiFiInterfaceType)]
case .nonWiFiInterfaceOnly:
rules = [NEOnDemandRuleConnect(interfaceType: nonWiFiInterfaceType), NEOnDemandRuleDisconnect(interfaceType: .wiFi)]
case .anyInterface(let ssidOption):
if case .anySSID = ssidOption {
rules = [NEOnDemandRuleConnect(interfaceType: .any)]
} else {
rules = ssidOnDemandRules(option: ssidOption) + [NEOnDemandRuleConnect(interfaceType: nonWiFiInterfaceType)]
}
}
tunnelProviderManager.onDemandRules = rules
tunnelProviderManager.isOnDemandEnabled = self != .off
}
init(from tunnelProviderManager: NETunnelProviderManager) {
if tunnelProviderManager.isOnDemandEnabled, let onDemandRules = tunnelProviderManager.onDemandRules {
self = ActivateOnDemandOption.create(from: onDemandRules)
} else {
self = .off
}
}
private static func create(from rules: [NEOnDemandRule]) -> ActivateOnDemandOption {
switch rules.count {
case 0:
return .off
case 1:
let rule = rules[0]
guard rule.action == .connect else { return .off }
return .anyInterface(.anySSID)
case 2:
guard let connectRule = rules.first(where: { $0.action == .connect }) else {
wg_log(.error, message: "Unexpected onDemandRules set on tunnel provider manager: \(rules.count) rules found but no connect rule.")
return .off
}
guard let disconnectRule = rules.first(where: { $0.action == .disconnect }) else {
wg_log(.error, message: "Unexpected onDemandRules set on tunnel provider manager: \(rules.count) rules found but no disconnect rule.")
return .off
}
if connectRule.interfaceTypeMatch == .wiFi && disconnectRule.interfaceTypeMatch == nonWiFiInterfaceType {
return .wiFiInterfaceOnly(.anySSID)
} else if connectRule.interfaceTypeMatch == nonWiFiInterfaceType && disconnectRule.interfaceTypeMatch == .wiFi {
return .nonWiFiInterfaceOnly
} else {
wg_log(.error, message: "Unexpected onDemandRules set on tunnel provider manager: \(rules.count) rules found but interface types are inconsistent.")
return .off
}
case 3:
guard let ssidRule = rules.first(where: { $0.interfaceTypeMatch == .wiFi && $0.ssidMatch != nil }) else { return .off }
guard let nonWiFiRule = rules.first(where: { $0.interfaceTypeMatch == nonWiFiInterfaceType }) else { return .off }
let ssids = ssidRule.ssidMatch!
switch (ssidRule.action, nonWiFiRule.action) {
case (.connect, .connect):
return .anyInterface(.onlySpecificSSIDs(ssids))
case (.connect, .disconnect):
return .wiFiInterfaceOnly(.onlySpecificSSIDs(ssids))
case (.disconnect, .connect):
return .anyInterface(.exceptSpecificSSIDs(ssids))
case (.disconnect, .disconnect):
return .wiFiInterfaceOnly(.exceptSpecificSSIDs(ssids))
default:
wg_log(.error, message: "Unexpected onDemandRules set on tunnel provider manager: \(rules.count) rules found")
return .off
}
default:
wg_log(.error, message: "Unexpected number of onDemandRules set on tunnel provider manager: \(rules.count) rules found")
return .off
}
}
}
private extension NEOnDemandRuleConnect {
convenience init(interfaceType: NEOnDemandRuleInterfaceType, ssids: [String]? = nil) {
self.init()
interfaceTypeMatch = interfaceType
ssidMatch = ssids
}
}
private extension NEOnDemandRuleDisconnect {
convenience init(interfaceType: NEOnDemandRuleInterfaceType, ssids: [String]? = nil) {
self.init()
interfaceTypeMatch = interfaceType
ssidMatch = ssids
}
}
private func ssidOnDemandRules(option: ActivateOnDemandSSIDOption) -> [NEOnDemandRule] {
switch option {
case .anySSID:
return [NEOnDemandRuleConnect(interfaceType: .wiFi)]
case .onlySpecificSSIDs(let ssids):
assert(!ssids.isEmpty)
return [NEOnDemandRuleConnect(interfaceType: .wiFi, ssids: ssids),
NEOnDemandRuleDisconnect(interfaceType: .wiFi)]
case .exceptSpecificSSIDs(let ssids):
return [NEOnDemandRuleDisconnect(interfaceType: .wiFi, ssids: ssids),
NEOnDemandRuleConnect(interfaceType: .wiFi)]
}
}
|
