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VPN: Introduce an error enum for adding/modifying/removing tunnels 

Signed-off-by: Roopesh Chander <roop@roopc.net>
This commit is contained in:
Roopesh Chander 2018-11-01 11:42:32 +05:30
parent dd33d74caf
commit 92d3de1b0d
1 changed files with 28 additions and 11 deletions
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39
WireGuard/WireGuard/VPN/TunnelsManager.swift
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@ -21,6 +21,13 @@ enum TunnelActivationError: Error {
case attemptingDeactivationWhenTunnelIsInactive
}
enum TunnelManagementError: Error {
case tunnelAlreadyExistsWithThatName
case vpnSystemErrorOnAddTunnel
case vpnSystemErrorOnModifyTunnel
case vpnSystemErrorOnRemoveTunnel
}
class TunnelsManager {
var tunnels: [TunnelContainer]
@ -76,10 +83,14 @@ class TunnelsManager {
return tunnels.count
}
func add(tunnelConfiguration: TunnelConfiguration, completionHandler: @escaping (TunnelContainer?, Error?) -> Void) {
func add(tunnelConfiguration: TunnelConfiguration, completionHandler: @escaping (TunnelContainer?, TunnelManagementError?) -> Void) {
let tunnelName = tunnelConfiguration.interface.name
assert(!tunnelName.isEmpty)
assert(!containsTunnel(named: tunnelName))
guard (!containsTunnel(named: tunnelName)) else {
completionHandler(nil, TunnelManagementError.tunnelAlreadyExistsWithThatName)
return
}
isAddingTunnel = true
let tunnelProviderManager = NETunnelProviderManager()
@ -90,7 +101,8 @@ class TunnelsManager {
tunnelProviderManager.saveToPreferences { [weak self] (error) in
defer { self?.isAddingTunnel = false }
guard (error == nil) else {
completionHandler(nil, error)
os_log("Add: Saving configuration failed: %{public}@", log: OSLog.default, type: .error, "\(error!)")
completionHandler(nil, TunnelManagementError.vpnSystemErrorOnAddTunnel)
return
}
if let s = self {
@ -107,11 +119,11 @@ class TunnelsManager {
}
}
func addMultiple(tunnelConfigurations: [TunnelConfiguration], completionHandler: @escaping (Int, Error?) -> Void) {
func addMultiple(tunnelConfigurations: [TunnelConfiguration], completionHandler: @escaping (Int, TunnelManagementError?) -> Void) {
addMultiple(tunnelConfigurations: tunnelConfigurations[0...], completionHandler: completionHandler)
}
private func addMultiple(tunnelConfigurations: ArraySlice<TunnelConfiguration>, completionHandler: @escaping (Int, Error?) -> Void) {
private func addMultiple(tunnelConfigurations: ArraySlice<TunnelConfiguration>, completionHandler: @escaping (Int, TunnelManagementError?) -> Void) {
assert(!tunnelConfigurations.isEmpty)
let head = tunnelConfigurations.first!
let tail = tunnelConfigurations[1 ..< tunnelConfigurations.count]
@ -128,7 +140,7 @@ class TunnelsManager {
}
}
func modify(tunnel: TunnelContainer, with tunnelConfiguration: TunnelConfiguration, completionHandler: @escaping (Error?) -> Void) {
func modify(tunnel: TunnelContainer, with tunnelConfiguration: TunnelConfiguration, completionHandler: @escaping (TunnelManagementError?) -> Void) {
let tunnelName = tunnelConfiguration.interface.name
assert(!tunnelName.isEmpty)
@ -138,7 +150,10 @@ class TunnelsManager {
let isNameChanged = (tunnelName != tunnelProviderManager.localizedDescription)
var oldName: String? = nil
if (isNameChanged) {
assert(!containsTunnel(named: tunnelName))
guard (!containsTunnel(named: tunnelName)) else {
completionHandler(TunnelManagementError.tunnelAlreadyExistsWithThatName)
return
}
oldName = tunnel.name
tunnel.name = tunnelName
}
@ -148,8 +163,9 @@ class TunnelsManager {
tunnelProviderManager.saveToPreferences { [weak self] (error) in
defer { self?.isModifyingTunnel = false }
guard (error != nil) else {
completionHandler(error)
guard (error == nil) else {
os_log("Modify: Saving configuration failed: %{public}@", log: OSLog.default, type: .error, "\(error!)")
completionHandler(TunnelManagementError.vpnSystemErrorOnModifyTunnel)
return
}
if let s = self {
@ -175,7 +191,7 @@ class TunnelsManager {
}
}
func remove(tunnel: TunnelContainer, completionHandler: @escaping (Error?) -> Void) {
func remove(tunnel: TunnelContainer, completionHandler: @escaping (TunnelManagementError?) -> Void) {
let tunnelProviderManager = tunnel.tunnelProvider
let tunnelIndex = tunnel.index
let tunnelName = tunnel.name
@ -185,7 +201,8 @@ class TunnelsManager {
tunnelProviderManager.removeFromPreferences { [weak self] (error) in
defer { self?.isDeletingTunnel = false }
guard (error == nil) else {
completionHandler(error)
os_log("Remove: Saving configuration failed: %{public}@", log: OSLog.default, type: .error, "\(error!)")
completionHandler(TunnelManagementError.vpnSystemErrorOnRemoveTunnel)
return
}
if let s = self {