Swift3: Extension died unexpectedly

[txthinking]

env

• swift: 3.0.1
• xcode: 8.1
• ios with network extension

First, let me make sure my app and config is correct

In startTunne methodl:

        let ipv4Settings = NEIPv4Settings(addresses: ["10.0.0.1"], subnetMasks: ["255.255.255.0"])
        let networkSettings = NEPacketTunnelNetworkSettings(tunnelRemoteAddress: "8.8.8.8")
        networkSettings.mtu = 1500
        networkSettings.iPv4Settings = ipv4Settings
        setTunnelNetworkSettings(networkSettings) {
            error in
            guard error == nil else {
                NSLog(error.debugDescription)
                completionHandler(error)
                return
            }
            completionHandler(nil)
        }

then start vpn, whatever the app is in the foreground or the background, the VPN is running correct. Network traffic is normal too.

Now, let me use NEKit

In startTunne method:

        let directAdapterFactory = DirectAdapterFactory()
        let allRule = AllRule(adapterFactory: directAdapterFactory)
        RuleManager.currentManager = RuleManager(fromRules: [allRule], appendDirect: true)
        RawSocketFactory.TunnelProvider = self
        self.proxyServer = GCDHTTPProxyServer(address: IPv4Address(fromString: "127.0.0.1"), port: Port(port: UInt16(self.proxyPort)))
        try! self.proxyServer.start()
        
        let networkSettings = NEPacketTunnelNetworkSettings(tunnelRemoteAddress: "8.8.8.8")
        networkSettings.mtu = 1500
        
        let ipv4Settings = NEIPv4Settings(addresses: ["192.169.89.1"], subnetMasks: ["255.255.255.0"])
        ipv4Settings.includedRoutes = [NetworkExtension.NEIPv4Route.default()]
        networkSettings.iPv4Settings = ipv4Settings
        
        let proxySettings = NEProxySettings()
        proxySettings.httpEnabled = true
        proxySettings.httpServer = NEProxyServer(address: "127.0.0.1", port: proxyPort)
        proxySettings.httpsEnabled = true
        proxySettings.httpsServer = NEProxyServer(address: "127.0.0.1", port: proxyPort)
        proxySettings.excludeSimpleHostnames = true
        networkSettings.proxySettings = proxySettings
        
        let DNSSettings = NEDNSSettings(servers: ["198.18.0.1"])
        DNSSettings.matchDomains = [""]
        DNSSettings.matchDomainsNoSearch = false
        networkSettings.dnsSettings = DNSSettings
        
        setTunnelNetworkSettings(networkSettings) {
            error in
            guard error == nil else {
                DDLogError("Encountered an error setting up the network: \(error)")
                completionHandler(error)
                return
            }
            self.interface = TUNInterface(packetFlow: self.packetFlow)
            let fakeIPPool = IPv4Pool(start: IPv4Address(fromString: "198.18.1.1")!, end: IPv4Address(fromString: "198.18.255.255")!)
            let dnsServer = DNSServer(address: IPv4Address(fromString: "198.18.0.1")!, port: Port(port: 53), fakeIPPool: fakeIPPool)
            let resolver = UDPDNSResolver(address: IPv4Address(fromString: "114.114.114.114")!, port: Port(port: 53))
            dnsServer.registerResolver(resolver)
            self.interface.registerStack(dnsServer)
            DNSServer.currentServer = dnsServer
            let udpStack = UDPDirectStack()
            self.interface.registerStack(udpStack)
            let tcpStack = TCPStack.stack
            tcpStack.proxyServer = self.proxyServer
            self.interface.registerStack(tcpStack)
            self.interface.start()
            completionHandler(nil)
        }

then start vpn, the vpn can be started, but i found when network traffic was generated, the Network Extension died unexpectedly.

This article also mentioned this problem.

Thanks for your NEKit.

[zhuhaow]

It'd be better if you could provide the crash report. Problem relating to IP packets will not be fixed as of now unless you can locate the bug. It's recommended to not enable TUN interface.

…

------------------- Zhuhao Wang Zhejiang university 2016年12月4日 +0800 13:21 Cloud <notifications@github.com>，写道：

env swift: 3.0.1 xcode: 8.1 ios with network extension First, let me make sure my app and config is correct In startTunne methodl: let ipv4Settings = NEIPv4Settings(addresses: ["10.0.0.1"], subnetMasks: ["255.255.255.0"]) let networkSettings = NEPacketTunnelNetworkSettings(tunnelRemoteAddress: "8.8.8.8") networkSettings.mtu = 1500 networkSettings.iPv4Settings = ipv4Settings setTunnelNetworkSettings(networkSettings) { error in guard error == nil else { NSLog(error.debugDescription) completionHandler(error) return } completionHandler(nil) } then start vpn, whatever the app is in the foreground or the background, the VPN is running correct. Network traffic is normal too. Now, let me use NEKit In startTunne method: let directAdapterFactory = DirectAdapterFactory() let allRule = AllRule(adapterFactory: directAdapterFactory) RuleManager.currentManager = RuleManager(fromRules: [allRule], appendDirect: true) RawSocketFactory.TunnelProvider = self self.proxyServer = GCDHTTPProxyServer(address: IPv4Address(fromString: "127.0.0.1"), port: Port(port: UInt16(self.proxyPort))) try! self.proxyServer.start() let networkSettings = NEPacketTunnelNetworkSettings(tunnelRemoteAddress: "8.8.8.8") networkSettings.mtu = 1500 let ipv4Settings = NEIPv4Settings(addresses: ["192.169.89.1"], subnetMasks: ["255.255.255.0"]) ipv4Settings.includedRoutes = [NetworkExtension.NEIPv4Route.default()] networkSettings.iPv4Settings = ipv4Settings let proxySettings = NEProxySettings() proxySettings.httpEnabled = true proxySettings.httpServer = NEProxyServer(address: "127.0.0.1", port: proxyPort) proxySettings.httpsEnabled = true proxySettings.httpsServer = NEProxyServer(address: "127.0.0.1", port: proxyPort) proxySettings.excludeSimpleHostnames = true networkSettings.proxySettings = proxySettings let DNSSettings = NEDNSSettings(servers: ["198.18.0.1"]) DNSSettings.matchDomains = [""] DNSSettings.matchDomainsNoSearch = false networkSettings.dnsSettings = DNSSettings setTunnelNetworkSettings(networkSettings) { error in guard error == nil else { DDLogError("Encountered an error setting up the network: \(error)") completionHandler(error) return } self.interface = TUNInterface(packetFlow: self.packetFlow) let fakeIPPool = IPv4Pool(start: IPv4Address(fromString: "198.18.1.1")!, end: IPv4Address(fromString: "198.18.255.255")!) let dnsServer = DNSServer(address: IPv4Address(fromString: "198.18.0.1")!, port: Port(port: 53), fakeIPPool: fakeIPPool) let resolver = UDPDNSResolver(address: IPv4Address(fromString: "114.114.114.114")!, port: Port(port: 53)) dnsServer.registerResolver(resolver) self.interface.registerStack(dnsServer) DNSServer.currentServer = dnsServer let udpStack = UDPDirectStack() self.interface.registerStack(udpStack) let tcpStack = TCPStack.stack tcpStack.proxyServer = self.proxyServer self.interface.registerStack(tcpStack) self.interface.start() completionHandler(nil) } then start vpn, the vpn can be started, but i found when network traffic was generated, the Network Extension died unexpectedly. > > This article (http://blog.w2fzu.com/2016/11/21/2016-11-12-learn-NetworkExtenison/#%E5%9B%9B%E3%80%81%E5%AF%BC%E5%85%A5NEKit) also mentioned this problem. > Thanks for your NEKit. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub (#31), or mute the thread (https://github.com/notifications/unsubscribe-auth/ABOmLMeN9V27ijlnnCzwOy22b9oZTSaGks5rEk3OgaJpZM4LDgKW).

[txthinking]

Thanks