[wireguard-apple] [iOS] Changing network fails with includeAllNetworks (Kill Switch)

[Juraj Hilje]

Hey Andrej, thanks for the response!

I've tested on iOS 14.8 and iOS 15.0 (public release), and even with the patch (b244febfdf3069dd4e8db2d31f0368d5474d7616) i still have the same issue on my end.

I will test the new iOS 15.1 Beta later today and let you know how it goes.

Juraj H.

> On 22.09.2021., at 10:08, Andrej Mihajlov <and at mullvad.net> wrote:
> 
> Have you tried on the most recent beta? I think it works over there, but requires some tweaks to the network monitor code in WireGuard. I had a patch somewhere here but haven’t spent much time testing it:
> 
> https://git.zx2c4.com/wireguard-apple/commit/?h=am/enable-include-all-networks&id=b244febfdf3069dd4e8db2d31f0368d5474d7616
> 
> Waiting for the final release of iOS 15.
> 
>> On 21 Sep 2021, at 12:55, Juraj Hilje <juraj.hilje at gmail.com> wrote:
>> 
>> If NETunnelProviderProtocol is configured with includeAllNetworks=true (Kill Switch), when network change is detected the device connectivity goes offline instead of routing VPN tunnel traffic through a new network.
>> 
>> Here are some logs from the moment of this event:
>> 2021-09-20 12:07:26.735453: [NET] Network change detected with unsatisfied route and interface order [en0, utun4, pdp_ip0]
>> 2021-09-20 12:07:26.736186: [NET] Connectivity offline, pausing backend.
>> 2021-09-20 12:07:26.736732: [NET] Device closing
>> 2021-09-20 12:07:26.737503: [NET] Routine: TUN reader - stopped
>> 2021-09-20 12:07:26.738970: [NET] Routine: event worker - stopped
>> 2021-09-20 12:07:26.739613: [NET] Routine: receive incoming v4 - stopped
>> 2021-09-20 12:07:26.742070: [NET] Routine: receive incoming v6 - stopped
>> 2021-09-20 12:07:26.746712: [NET] peer(eN1f…Oymc) - Stopping
>> 2021-09-20 12:07:26.751550: [NET] peer(eN1f…Oymc) - Routine: sequential receiver - stopped
>> 2021-09-20 12:07:26.751597: [NET] peer(eN1f…Oymc) - Routine: sequential sender - stopped
>> 2021-09-20 12:07:26.753433: [NET] Device closed
>> 2021-09-20 12:07:26.754097: [NET] Routine: decryption worker 5 - stopped
>> 
>> Tested on devices: iOS 14.8, iPadOS 15
>> WireGuardKit: 79aeb0be0d0aa3f6c8bd24309aaa8dcf03216fb4
>> 
>> More info on includeAllNetworks option:
>> https://developer.apple.com/documentation/networkextension/nevpnprotocol/3131931-includeallnetworks
>> 
>> Can someone confirm this issue or point to a possible workaround?
>> Thanks!
>> 
>> Juraj H.
>