The network fails after switching the WWAN to WiFi

[guhan121]

because after user connect the wifi,The VPN is still in use 4g, i set tunPersist = false add some code .

[self.openVpnReach startTrackingWithCallback:^(OpenVPNReachabilityStatus status) {
        NSLog(@"[VPN]:OpenVPNReachabilityStatus: %ld", (long) status);
        if (status == OpenVPNReachabilityStatusNotReachable) {
            [self.vpnAdapter reconnectAfterTimeInterval:5];
        } else if (self.lastStatus == OpenVPNReachabilityStatusReachableViaWWAN && status == OpenVPNReachabilityStatusReachableViaWiFi) {
            NSLog(@"[VPN]:reconnect vpn after 4 second.");
            [self.vpnAdapter reconnectAfterTimeInterval:4];
        }
    }];

Although a reconnection did occur and the service server was able to see a successful connection, it appeared that the network was not connected and could not access the network properly.

It looks like the tun was not connected to the correct net interface.

@ss-abramchuk can you help me.

[guhan121]

@ss-abramchuk add log when i change wifi to 4g

it call restart,and network work fine.

[ss-abramchuk]

Hi @guhan121,

Indeed, I can confirm there is such problem. Looks like it appeared not so long ago as previously the workaround with reachability worked fine for me. Initially, I thought there is something wrong with tunnel and routes but I compared routes configuration when connection works and when it doesn't and I haven't found anything suspicious. Moreover, configuration process is almost the same, no matter if you connects to VPN server first time or after loosing connection or switching network interface. So it shouldn't affect connection somehow.

Alas, but I don't have a solution right now, need to investigate why it happens

[ss-abramchuk]

Hi @guhan121,

Could you try feature/reconnection-issue branch and let me know if it works for you? BTW, I slightly changed API so your have to update you code as well.

[guhan121]

we test it in many phone,it work fine. thanks! When do you merge it.