Implement new interface api

app/src/main/java/io/nekohasekai/sfa/bg/DefaultNetworkMonitor.kt

@@ -55,10 +55,10 @@ object DefaultNetworkMonitor {
                     Thread.sleep(100)
                     continue
                 }
-                listener.updateDefaultInterface(interfaceName, interfaceIndex)
+                listener.updateDefaultInterface(interfaceName, interfaceIndex, false, false)
             }
         } else {
-            listener.updateDefaultInterface("", -1)
+            listener.updateDefaultInterface("", -1, false, false)
         }
     }
 

app/src/main/java/io/nekohasekai/sfa/bg/PlatformInterfaceWrapper.kt

@@ -2,10 +2,14 @@ package io.nekohasekai.sfa.bg
 
 import android.annotation.SuppressLint
 import android.content.pm.PackageManager
+import android.net.NetworkCapabilities
 import android.os.Build
 import android.os.Process
+import android.system.OsConstants
+import android.util.Log
 import androidx.annotation.RequiresApi
 import io.nekohasekai.libbox.InterfaceUpdateListener
+import io.nekohasekai.libbox.Libbox
 import io.nekohasekai.libbox.NetworkInterfaceIterator
 import io.nekohasekai.libbox.PlatformInterface
 import io.nekohasekai.libbox.StringIterator
@@ -16,7 +20,6 @@ import java.net.Inet6Address
 import java.net.InetSocketAddress
 import java.net.InterfaceAddress
 import java.net.NetworkInterface
-import java.util.Enumeration
 import io.nekohasekai.libbox.NetworkInterface as LibboxNetworkInterface
 
 interface PlatformInterfaceWrapper : PlatformInterface {
@@ -44,6 +47,7 @@ interface PlatformInterfaceWrapper : PlatformInterface {
         destinationAddress: String,
         destinationPort: Int
     ): Int {
+        try {
             val uid = Application.connectivity.getConnectionOwnerUid(
                 ipProtocol,
                 InetSocketAddress(sourceAddress, sourcePort),
@@ -51,6 +55,11 @@ interface PlatformInterfaceWrapper : PlatformInterface {
             )
             if (uid == Process.INVALID_UID) error("android: connection owner not found")
             return uid
+        } catch (e: Exception) {
+            Log.e("PlatformInterface", "getConnectionOwnerUid", e)
+            e.printStackTrace(System.err)
+            throw e
+        }
     }
 
     override fun packageNameByUid(uid: Int): String {
@@ -76,10 +85,6 @@ interface PlatformInterfaceWrapper : PlatformInterface {
         }
     }
 
-    override fun usePlatformDefaultInterfaceMonitor(): Boolean {
-        return true
-    }
-
     override fun startDefaultInterfaceMonitor(listener: InterfaceUpdateListener) {
         DefaultNetworkMonitor.setListener(listener)
     }
@@ -88,12 +93,56 @@ interface PlatformInterfaceWrapper : PlatformInterface {
         DefaultNetworkMonitor.setListener(null)
     }
 
-    override fun usePlatformInterfaceGetter(): Boolean {
-        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.R
-    }
-
     override fun getInterfaces(): NetworkInterfaceIterator {
-        return InterfaceArray(NetworkInterface.getNetworkInterfaces())
+        val networks = Application.connectivity.allNetworks
+        val networkInterfaces = NetworkInterface.getNetworkInterfaces().toList()
+        val interfaces = mutableListOf<LibboxNetworkInterface>()
+        for (network in networks) {
+            val boxInterface = LibboxNetworkInterface()
+            val linkProperties = Application.connectivity.getLinkProperties(network) ?: continue
+            val networkCapabilities =
+                Application.connectivity.getNetworkCapabilities(network) ?: continue
+            boxInterface.name = linkProperties.interfaceName
+            val networkInterface =
+                networkInterfaces.find { it.name == boxInterface.name } ?: continue
+            boxInterface.dnsServer =
+                StringArray(linkProperties.dnsServers.mapNotNull { it.hostAddress }.iterator())
+            boxInterface.type = when {
+                networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) -> Libbox.InterfaceTypeWIFI
+                networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) -> Libbox.InterfaceTypeCellular
+                networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET) -> Libbox.InterfaceTypeEthernet
+                else -> Libbox.InterfaceTypeOther
+            }
+            boxInterface.index = networkInterface.index
+            runCatching {
+                boxInterface.mtu = networkInterface.mtu
+            }.onFailure {
+                Log.e(
+                    "PlatformInterface", "failed to get mtu for interface ${boxInterface.name}", it
+                )
+            }
+            boxInterface.addresses =
+                StringArray(networkInterface.interfaceAddresses.mapTo(mutableListOf()) { it.toPrefix() }
+                    .iterator())
+            var dumpFlags = 0
+            if (networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)) {
+                dumpFlags = OsConstants.IFF_UP or OsConstants.IFF_RUNNING
+            }
+            if (networkInterface.isLoopback) {
+                dumpFlags = dumpFlags or OsConstants.IFF_LOOPBACK
+            }
+            if (networkInterface.isPointToPoint) {
+                dumpFlags = dumpFlags or OsConstants.IFF_POINTOPOINT
+            }
+            if (networkInterface.supportsMulticast()) {
+                dumpFlags = dumpFlags or OsConstants.IFF_MULTICAST
+            }
+            boxInterface.flags = dumpFlags
+            boxInterface.metered =
+                !networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED)
+            interfaces.add(boxInterface)
+        }
+        return InterfaceArray(interfaces.iterator())
     }
 
     override fun underNetworkExtension(): Boolean {
@@ -108,55 +157,29 @@ interface PlatformInterfaceWrapper : PlatformInterface {
     }
 
     override fun readWIFIState(): WIFIState? {
-        @Suppress("DEPRECATION")
+        @Suppress("DEPRECATION") val wifiInfo =
-        val wifiInfo = Application.wifiManager.connectionInfo ?: return null
+            Application.wifiManager.connectionInfo ?: return null
         var ssid = wifiInfo.ssid
+        if (ssid == "<unknown ssid>") {
+            return WIFIState("", "")
+        }
         if (ssid.startsWith("\"") && ssid.endsWith("\"")) {
             ssid = ssid.substring(1, ssid.length - 1)
         }
         return WIFIState(ssid, wifiInfo.bssid)
     }
 
-    private class InterfaceArray(private val iterator: Enumeration<NetworkInterface>) :
+    private class InterfaceArray(private val iterator: Iterator<LibboxNetworkInterface>) :
         NetworkInterfaceIterator {
 
         override fun hasNext(): Boolean {
-            return iterator.hasMoreElements()
+            return iterator.hasNext()
         }
 
         override fun next(): LibboxNetworkInterface {
-            val element = iterator.nextElement()
+            return iterator.next()
-            return LibboxNetworkInterface().apply {
-                name = element.name
-                index = element.index
-                runCatching {
-                    mtu = element.mtu
-                }
-                addresses =
-                    StringArray(
-                        element.interfaceAddresses.mapTo(mutableListOf()) { it.toPrefix() }
-                            .iterator()
-                    )
-                runCatching {
-                    flags = element.flags
-                }
-            }
         }
 
-        private fun InterfaceAddress.toPrefix(): String {
-            return if (address is Inet6Address) {
-                "${Inet6Address.getByAddress(address.address).hostAddress}/${networkPrefixLength}"
-            } else {
-                "${address.hostAddress}/${networkPrefixLength}"
-            }
-        }
-
-        private val NetworkInterface.flags: Int
-            @SuppressLint("SoonBlockedPrivateApi")
-            get() {
-                val getFlagsMethod = NetworkInterface::class.java.getDeclaredMethod("getFlags")
-                return getFlagsMethod.invoke(this) as Int
-            }
     }
 
     private class StringArray(private val iterator: Iterator<String>) : StringIterator {
@@ -175,4 +198,17 @@ interface PlatformInterfaceWrapper : PlatformInterface {
         }
     }
 
+    private fun InterfaceAddress.toPrefix(): String {
+        return if (address is Inet6Address) {
+            "${Inet6Address.getByAddress(address.address).hostAddress}/${networkPrefixLength}"
+        } else {
+            "${address.hostAddress}/${networkPrefixLength}"
+        }
+    }
+
+    private val NetworkInterface.flags: Int
+        @SuppressLint("SoonBlockedPrivateApi") get() {
+            val getFlagsMethod = NetworkInterface::class.java.getDeclaredMethod("getFlags")
+            return getFlagsMethod.invoke(this) as Int
+        }
 }