Reconnecting NEPacketTunnelProvider

Hi,

In my attempt to reconnect NEPacketTunnelProvider, when there is a network change, I am making use of self.reasserting and setTunnelNetworkSettings, and I am calling it with similar parameters as during the startTunnelWithOptions callback and making sure to make a new call for setting the includedRoutes:

NEPacketTunnelNetworkSettings.IPv4Settings.includedRoutes = @[NEIPv4Route.defaultRoute];

This works sometimes, when I switch to a new network, but most of the time the traffic flow stops and it only works when I switch back to the first network.

The only difference I could see in the routing table when it works is when there is a presence of Apple Specific network routes as follows:

17.57.145.133      link#22            UHWIig              utun4       
17.57.145.135      link#22            UHWIig              utun4       
17.57.145.137      link#22            UHWIig              utun4  

or

13.107.246.47      link#22            UHW3Ig              utun4  
17.57.145.148      link#22            UHWIig              utun4       
17.57.145.149      link#22            UHWIig              utun4       
37.252.171.52      link#22            UHWIig              utun4       
37.252.173.215     link#22            UHWIig              utun4   

Note: utun4 has index of 22

or some other combination of routes for Apple, I am not sure what these routes are for but they are present when NEPacketTunnelProvider starts.

When switching to a new network and calling setTunnelNetworkSettings of NEPacketTunnelProvider, in any case when these routes are not present the traffic flow stops and it works otherwise. Switching back the first network, brings back these routes and the traffic flow continues, although it also goes through the same setTunnelNetworkSettings call and logic.

I am not sure if these route table entries could be the culprit, because I did try to add them manually and that didn't help but my guess is that some system calls are failing for some unknown reason which might be the reason for the missing routes and some other configuration needed for proper traffic flow, which I am not seeing.

Any help or information would be greatly appreciated.

Thanks.