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Retain legacy MTU across iOS update

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Enforce 1200 (formerly 1250). If and only if unset.

Defaulting to standard MTU (1500) without notice, may break
connectivity for some existing users.
This commit is contained in:
Davide De Rosa 2021-01-04 23:40:49 +01:00
parent 04fc806e5a
commit 7b87f4247c
1 changed files with 31 additions and 0 deletions
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31
Passepartout/Core/Sources/Model/TransientStore.swift
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@ -44,6 +44,8 @@ public class TransientStore {
static let didMigrateHostsToUUID = "DidMigrateHostsToUUID" static let didMigrateHostsToUUID = "DidMigrateHostsToUUID"
static let didMigrateKeychainContext = "didMigrateKeychainContext" static let didMigrateKeychainContext = "didMigrateKeychainContext"
static let didMigrateRetainLowMTU = "didMigrateRetainLowMTU"
} }
public static let shared = TransientStore() public static let shared = TransientStore()
@ -81,6 +83,15 @@ public class TransientStore {
} }
} }
public static var didMigrateRetainLowMTU: Bool {
get {
return UserDefaults.standard.bool(forKey: Keys.didMigrateRetainLowMTU)
}
set {
UserDefaults.standard.set(newValue, forKey: Keys.didMigrateRetainLowMTU)
}
}
public static var baseVPNConfiguration: OpenVPNTunnelProvider.ConfigurationBuilder { public static var baseVPNConfiguration: OpenVPNTunnelProvider.ConfigurationBuilder {
let sessionBuilder = OpenVPN.ConfigurationBuilder() let sessionBuilder = OpenVPN.ConfigurationBuilder()
var builder = OpenVPNTunnelProvider.ConfigurationBuilder(sessionConfiguration: sessionBuilder.build()) var builder = OpenVPNTunnelProvider.ConfigurationBuilder(sessionConfiguration: sessionBuilder.build())
@ -127,6 +138,26 @@ public class TransientStore {
service.migrateKeychainContext() service.migrateKeychainContext()
TransientStore.didMigrateKeychainContext = true TransientStore.didMigrateKeychainContext = true
} }
if !TransientStore.didMigrateRetainLowMTU {
for key in service.allProfileKeys() {
guard let profile = service.profile(withKey: key) else {
continue
}
if profile.networkChoices == nil {
profile.networkChoices = ProfileNetworkChoices(
choice: (key.context == .provider) ? .server : .client
)
}
if profile.manualNetworkSettings == nil {
profile.manualNetworkSettings = ProfileNetworkSettings()
}
if profile.manualNetworkSettings?.mtuBytes == nil {
profile.networkChoices?.mtu = .manual
profile.manualNetworkSettings?.mtuBytes = 1200
}
}
TransientStore.didMigrateRetainLowMTU = true
}
#endif #endif
} catch let e { } catch let e {
log.error("Could not decode service: \(e)") log.error("Could not decode service: \(e)")