Implement MAC lookup (#68)

* Implement MAC lookup * Refine error processing * Use long to store MAC consistently * Link back to macvendors.co * Undo some havoc * Do not show mac spans for TV * Show MAC and IP in a consistent order * Add IP spans by ipinfo.io * Add SpanFormatter * Fix IPv6 ipinfo.io link * Refine SpanFormatter * Fix pressing the link
2019-01-26 21:20:40 +08:00
parent 94114f7a4b
commit d4208affbb
38 changed files with 562 additions and 112 deletions
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@ buildscript {
    ext {
        kotlinVersion = '1.3.20'
        lifecycleVersion = '2.0.0'
-        roomVersion = '2.0.0'
+        roomVersion = '2.1.0-alpha03'
    }
    repositories {
        google()
--- a/mobile/.gitignore
+++ b/mobile/.gitignore
@@ -1,6 +1,3 @@
 /build
 /debug
 release/
-
-# tests aren't ready yet
-/src/androidTest
--- a/mobile/build.gradle
+++ b/mobile/build.gradle
@@ -55,6 +55,9 @@ android {
            buildConfigField "boolean", "DONATIONS", "false"
        }
    }
+    sourceSets {
+        androidTest.assets.srcDirs += files("$projectDir/schemas".toString())
+    }
 }

 dependencies {
@@ -67,7 +70,7 @@ dependencies {
    implementation "androidx.lifecycle:lifecycle-extensions:$lifecycleVersion"
    implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycleVersion"
    implementation "androidx.preference:preference:1.1.0-alpha02"
-    implementation "androidx.room:room-runtime:$roomVersion"
+    implementation "androidx.room:room-coroutines:$roomVersion"
    implementation 'com.github.luongvo:BadgeView:1.1.5'
    implementation 'com.github.topjohnwu.libsu:core:2.2.0'
    implementation "com.google.android.material:material:1.0.0"
@@ -75,14 +78,16 @@ dependencies {
    implementation 'com.linkedin.dexmaker:dexmaker:2.21.0'
    implementation 'com.takisoft.preferencex:preferencex-simplemenu:1.0.0'
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlinVersion"
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.1.1'
    baseImplementation 'com.android.billingclient:billing:1.2'
    baseImplementation 'com.crashlytics.sdk.android:crashlytics:2.9.8'
    baseImplementation 'com.google.firebase:firebase-core:16.0.6'
    testImplementation "androidx.arch.core:core-testing:$lifecycleVersion"
-    testImplementation "androidx.room:room-testing:$roomVersion"
    testImplementation 'junit:junit:4.12'
+    androidTestImplementation "androidx.room:room-testing:$roomVersion"
    androidTestImplementation 'androidx.test:runner:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
+    androidTestImplementation "androidx.test.ext:junit-ktx:1.1.0"
 }

 if (getGradle().getStartParameter().getTaskRequests().toString().contains("Base"))
--- a/mobile/schemas/be.mygod.vpnhotspot.room.AppDatabase/2.json
+++ b/mobile/schemas/be.mygod.vpnhotspot.room.AppDatabase/2.json
@@ -0,0 +1,152 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 2,
+    "identityHash": "92a6c0406ed7265dbd98eb3c24095651",
+    "entities": [
+      {
+        "tableName": "ClientRecord",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`mac` INTEGER NOT NULL, `nickname` BLOB NOT NULL, `blocked` INTEGER NOT NULL, `macLookupPending` INTEGER NOT NULL, PRIMARY KEY(`mac`))",
+        "fields": [
+          {
+            "fieldPath": "mac",
+            "columnName": "mac",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "nickname",
+            "columnName": "nickname",
+            "affinity": "BLOB",
+            "notNull": true
+          },
+          {
+            "fieldPath": "blocked",
+            "columnName": "blocked",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "macLookupPending",
+            "columnName": "macLookupPending",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "mac"
+          ],
+          "autoGenerate": false
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "TrafficRecord",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT, `timestamp` INTEGER NOT NULL, `mac` INTEGER NOT NULL, `ip` BLOB NOT NULL, `upstream` TEXT, `downstream` TEXT NOT NULL, `sentPackets` INTEGER NOT NULL, `sentBytes` INTEGER NOT NULL, `receivedPackets` INTEGER NOT NULL, `receivedBytes` INTEGER NOT NULL, `previousId` INTEGER, FOREIGN KEY(`previousId`) REFERENCES `TrafficRecord`(`id`) ON UPDATE RESTRICT ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "timestamp",
+            "columnName": "timestamp",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "mac",
+            "columnName": "mac",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "ip",
+            "columnName": "ip",
+            "affinity": "BLOB",
+            "notNull": true
+          },
+          {
+            "fieldPath": "upstream",
+            "columnName": "upstream",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "downstream",
+            "columnName": "downstream",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "sentPackets",
+            "columnName": "sentPackets",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "sentBytes",
+            "columnName": "sentBytes",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "receivedPackets",
+            "columnName": "receivedPackets",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "receivedBytes",
+            "columnName": "receivedBytes",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "previousId",
+            "columnName": "previousId",
+            "affinity": "INTEGER",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_TrafficRecord_previousId",
+            "unique": true,
+            "columnNames": [
+              "previousId"
+            ],
+            "createSql": "CREATE UNIQUE INDEX `index_TrafficRecord_previousId` ON `${TABLE_NAME}` (`previousId`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "TrafficRecord",
+            "onDelete": "CASCADE",
+            "onUpdate": "RESTRICT",
+            "columns": [
+              "previousId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      }
+    ],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, \"92a6c0406ed7265dbd98eb3c24095651\")"
+    ]
+  }
+}
--- a/mobile/src/androidTest/java/be/mygod/vpnhotspot/room/MigrationTest.kt
+++ b/mobile/src/androidTest/java/be/mygod/vpnhotspot/room/MigrationTest.kt
@@ -0,0 +1,29 @@
+package be.mygod.vpnhotspot.room
+
+import androidx.room.testing.MigrationTestHelper
+import androidx.sqlite.db.framework.FrameworkSQLiteOpenHelperFactory
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.platform.app.InstrumentationRegistry
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+import java.io.IOException
+
+@RunWith(AndroidJUnit4::class)
+class MigrationTest {
+    companion object {
+        private const val TEST_DB = "migration-test"
+    }
+
+    @get:Rule
+    val privateDatabase = MigrationTestHelper(InstrumentationRegistry.getInstrumentation(),
+            AppDatabase::class.java.canonicalName, FrameworkSQLiteOpenHelperFactory())
+
+    @Test
+    @Throws(IOException::class)
+    fun migrate2() {
+        val db = privateDatabase.createDatabase(TEST_DB, 1)
+        db.close()
+        privateDatabase.runMigrationsAndValidate(TEST_DB, 2, true, AppDatabase.Migration2)
+    }
+}
--- a/mobile/src/base/java/be/mygod/vpnhotspot/EBegFragment.kt
+++ b/mobile/src/base/java/be/mygod/vpnhotspot/EBegFragment.kt
@@ -12,8 +12,8 @@ import android.widget.Spinner
 import androidx.annotation.StringRes
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatDialogFragment
-import androidx.core.net.toUri
 import androidx.versionedparcelable.VersionedParcelable
+import be.mygod.vpnhotspot.util.launchUrl
 import be.mygod.vpnhotspot.widget.SmartSnackbar
 import com.android.billingclient.api.*
 import timber.log.Timber
@@ -62,9 +62,7 @@ class EBegFragment : AppCompatDialogFragment(), PurchasesUpdatedListener, Billin
        }
        @Suppress("ConstantConditionIf")
        if (BuildConfig.DONATIONS) (view.findViewById<ViewStub>(R.id.donations__more_stub).inflate() as Button)
-                .setOnClickListener {
-                    (activity as MainActivity).launchUrl("https://mygod.be/donate/".toUri())
-                }
+                .setOnClickListener { requireContext().launchUrl("https://mygod.be/donate/") }
    }

    private fun openDialog(@StringRes title: Int, @StringRes message: Int) {
--- a/mobile/src/fdroid/java/be/mygod/vpnhotspot/EBegFragment.kt
+++ b/mobile/src/fdroid/java/be/mygod/vpnhotspot/EBegFragment.kt
@@ -7,8 +7,8 @@ import android.view.ViewGroup
 import android.view.ViewStub
 import android.widget.Button
 import android.widget.LinearLayout
-import androidx.core.net.toUri
 import androidx.appcompat.app.AppCompatDialogFragment
+import be.mygod.vpnhotspot.util.launchUrl

 /**
 * Based on: https://github.com/PrivacyApps/donations/blob/747d36a18433c7e9329691054122a8ad337a62d2/Donations/src/main/java/org/sufficientlysecure/donations/DonationsFragment.java
@@ -21,7 +21,7 @@ class EBegFragment : AppCompatDialogFragment() {
        super.onViewCreated(view, savedInstanceState)
        view.findViewById<LinearLayout>(R.id.donations__google).visibility = View.GONE
        (view.findViewById<ViewStub>(R.id.donations__more_stub).inflate() as Button).setOnClickListener {
-            (activity as MainActivity).launchUrl("https://mygod.be/donate/".toUri())
+            requireContext().launchUrl("https://mygod.be/donate/")
        }
    }
 }
--- a/mobile/src/main/java/be/mygod/vpnhotspot/App.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/App.kt
@@ -8,8 +8,9 @@ import android.content.res.Configuration
 import android.net.ConnectivityManager
 import android.net.wifi.WifiManager
 import android.os.Build
-import android.os.Handler
 import android.preference.PreferenceManager
+import androidx.browser.customtabs.CustomTabsIntent
+import androidx.core.content.ContextCompat
 import androidx.core.content.getSystemService
 import be.mygod.vpnhotspot.room.AppDatabase
 import be.mygod.vpnhotspot.util.DeviceStorageApp
@@ -47,12 +48,18 @@ class App : Application() {
    }

    lateinit var deviceStorage: Application
-    val handler = Handler()
    val pref: SharedPreferences by lazy { PreferenceManager.getDefaultSharedPreferences(deviceStorage) }
    val connectivity by lazy { getSystemService<ConnectivityManager>()!! }
    val uiMode by lazy { getSystemService<UiModeManager>()!! }
    val wifi by lazy { getSystemService<WifiManager>()!! }

+    val hasTouch by lazy { packageManager.hasSystemFeature("android.hardware.faketouch") }
+    val customTabsIntent by lazy {
+        CustomTabsIntent.Builder()
+                .setToolbarColor(ContextCompat.getColor(this, R.color.colorPrimary))
+                .build()
+    }
+
    val operatingChannel: Int get() {
        val result = pref.getString(KEY_OPERATING_CHANNEL, null)?.toIntOrNull() ?: 0
        return if (result in 1..165) result else 0
--- a/mobile/src/main/java/be/mygod/vpnhotspot/MainActivity.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/MainActivity.kt
@@ -1,13 +1,10 @@
 package be.mygod.vpnhotspot

-import android.content.ActivityNotFoundException
 import android.content.Intent
-import android.net.Uri
 import android.os.Bundle
 import android.view.Gravity
 import android.view.MenuItem
 import androidx.appcompat.app.AppCompatActivity
-import androidx.browser.customtabs.CustomTabsIntent
 import androidx.core.content.ContextCompat
 import androidx.databinding.DataBindingUtil
 import androidx.fragment.app.Fragment
@@ -27,19 +24,6 @@ import q.rorbin.badgeview.QBadgeView
 class MainActivity : AppCompatActivity(), BottomNavigationView.OnNavigationItemSelectedListener {
    private lateinit var binding: ActivityMainBinding
    private lateinit var badge: QBadgeView
-    private val customTabsIntent by lazy {
-        CustomTabsIntent.Builder()
-                .setToolbarColor(ContextCompat.getColor(this, R.color.colorPrimary))
-                .build()
-    }
-
-    fun launchUrl(url: Uri) {
-        if (packageManager.hasSystemFeature("android.hardware.faketouch")) try {
-            customTabsIntent.launchUrl(this, url)
-            return
-        } catch (_: ActivityNotFoundException) { } catch (_: SecurityException) { }
-        SmartSnackbar.make(url.toString()).show()
-    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
--- a/mobile/src/main/java/be/mygod/vpnhotspot/RepeaterService.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/RepeaterService.kt
@@ -11,10 +11,10 @@ import android.net.wifi.p2p.WifiP2pGroup
 import android.net.wifi.p2p.WifiP2pInfo
 import android.net.wifi.p2p.WifiP2pManager
 import android.os.Build
+import android.os.Handler
 import android.os.Looper
 import androidx.annotation.StringRes
 import androidx.core.content.getSystemService
-import androidx.core.os.postDelayed
 import be.mygod.vpnhotspot.App.Companion.app
 import be.mygod.vpnhotspot.net.wifi.WifiDoubleLock
 import be.mygod.vpnhotspot.net.wifi.WifiP2pManagerHelper
@@ -105,6 +105,7 @@ class RepeaterService : Service(), WifiP2pManager.ChannelListener, SharedPrefere
    private val p2pManager get() = RepeaterService.p2pManager!!
    private var channel: WifiP2pManager.Channel? = null
    private val binder = Binder()
+    private val handler = Handler()
    private var receiverRegistered = false
    private val receiver = broadcastReceiver { _, intent ->
        when (intent.action) {
@@ -180,7 +181,7 @@ class RepeaterService : Service(), WifiP2pManager.ChannelListener, SharedPrefere
            setOperatingChannel()
        } catch (e: RuntimeException) {
            Timber.w(e)
-            app.handler.postDelayed(1000, this, this::onChannelDisconnected)
+            handler.postDelayed(this::onChannelDisconnected, 1000)
        }
    }

@@ -318,7 +319,7 @@ class RepeaterService : Service(), WifiP2pManager.ChannelListener, SharedPrefere
    }

    override fun onDestroy() {
-        app.handler.removeCallbacksAndMessages(this)
+        handler.removeCallbacksAndMessages(null)
        if (status != Status.IDLE) binder.shutdown()
        clean() // force clean to prevent leakage
        app.pref.unregisterOnSharedPreferenceChangeListener(this)
--- a/mobile/src/main/java/be/mygod/vpnhotspot/SettingsPreferenceFragment.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/SettingsPreferenceFragment.kt
@@ -5,7 +5,6 @@ import android.content.Intent
 import android.os.Build
 import android.os.Bundle
 import androidx.core.content.FileProvider
-import androidx.core.net.toUri
 import androidx.preference.Preference
 import androidx.preference.PreferenceFragmentCompat
 import androidx.preference.SwitchPreference
@@ -19,6 +18,7 @@ import be.mygod.vpnhotspot.preference.AlwaysAutoCompleteEditTextPreferenceDialog
 import be.mygod.vpnhotspot.preference.SharedPreferenceDataStore
 import be.mygod.vpnhotspot.preference.SummaryFallbackProvider
 import be.mygod.vpnhotspot.util.RootSession
+import be.mygod.vpnhotspot.util.launchUrl
 import be.mygod.vpnhotspot.widget.SmartSnackbar
 import timber.log.Timber
 import java.io.File
@@ -120,7 +120,7 @@ class SettingsPreferenceFragment : PreferenceFragmentCompat() {
            true
        }
        findPreference<Preference>("misc.source").setOnPreferenceClickListener {
-            (activity as MainActivity).launchUrl("https://github.com/Mygod/VPNHotspot/blob/master/README.md".toUri())
+            requireContext().launchUrl("https://github.com/Mygod/VPNHotspot/blob/master/README.md")
            true
        }
        findPreference<Preference>("misc.donate").setOnPreferenceClickListener {
--- a/mobile/src/main/java/be/mygod/vpnhotspot/TetheringService.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/TetheringService.kt
@@ -11,6 +11,9 @@ import be.mygod.vpnhotspot.net.wifi.WifiDoubleLock
 import be.mygod.vpnhotspot.util.Event0
 import be.mygod.vpnhotspot.util.broadcastReceiver
 import be.mygod.vpnhotspot.widget.SmartSnackbar
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
 import timber.log.Timber

 class TetheringService : IpNeighbourMonitoringService() {
@@ -90,7 +93,7 @@ class TetheringService : IpNeighbourMonitoringService() {
            }
            updateNotification()
        }
-        app.handler.post { binder.routingsChanged() }
+        GlobalScope.launch(Dispatchers.Main) { binder.routingsChanged() }
    }

    override fun onBind(intent: Intent?) = binder
--- a/mobile/src/main/java/be/mygod/vpnhotspot/client/Client.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/client/Client.kt
@@ -11,44 +11,63 @@ import be.mygod.vpnhotspot.net.InetAddressComparator
 import be.mygod.vpnhotspot.net.IpNeighbour
 import be.mygod.vpnhotspot.net.TetherType
 import be.mygod.vpnhotspot.room.AppDatabase
-import be.mygod.vpnhotspot.room.macToLong
+import be.mygod.vpnhotspot.room.ClientRecord
+import be.mygod.vpnhotspot.room.macToString
+import be.mygod.vpnhotspot.util.makeIpSpan
+import be.mygod.vpnhotspot.util.makeMacSpan
 import be.mygod.vpnhotspot.util.onEmpty
 import java.net.InetAddress
 import java.util.*

-open class Client(val mac: String, val iface: String) {
+open class Client(val mac: Long, val iface: String) {
    companion object DiffCallback : DiffUtil.ItemCallback<Client>() {
        override fun areItemsTheSame(oldItem: Client, newItem: Client) =
                oldItem.iface == newItem.iface && oldItem.mac == newItem.mac
        override fun areContentsTheSame(oldItem: Client, newItem: Client) = oldItem == newItem
    }

-    private val macIface get() = "$mac%$iface"
    val ip = TreeMap<InetAddress, IpNeighbour.State>(InetAddressComparator)
-    val record = AppDatabase.instance.clientRecordDao.lookupSync(mac.macToLong())
+    val macString by lazy { mac.macToString() }
+    private val record = AppDatabase.instance.clientRecordDao.lookupSync(mac)
+    private val macIface get() = SpannableStringBuilder(makeMacSpan(macString)).apply {
+        append('%')
+        append(iface)
+    }

    val nickname get() = record.value?.nickname ?: ""
    val blocked get() = record.value?.blocked == true

    open val icon get() = TetherType.ofInterface(iface).icon
    val title = Transformations.map(record) { record ->
-        SpannableStringBuilder(record.nickname.onEmpty(macIface)).apply {
-            if (record.blocked) setSpan(StrikethroughSpan(), 0, length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
+        /**
+         * we hijack the get title process to check if we need to perform MacLookup,
+         * as record might not be initialized in other more appropriate places
+         */
+        if (record?.nickname.isNullOrEmpty() && record?.macLookupPending != false) MacLookup.perform(mac)
+        SpannableStringBuilder(record?.nickname.onEmpty(macIface)).apply {
+            if (record?.blocked == true) {
+                setSpan(StrikethroughSpan(), 0, length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
            }
        }
+    }
+    val titleSelectable = Transformations.map(record) { it?.nickname.isNullOrEmpty() }
    val description = Transformations.map(record) { record ->
-        StringBuilder(if (record.nickname.isEmpty()) "" else "$macIface\n").apply {
+        SpannableStringBuilder().apply {
+            if (!record?.nickname.isNullOrEmpty()) appendln(macIface)
            ip.entries.forEach { (ip, state) ->
-                appendln(app.getString(when (state) {
+                append(makeIpSpan(ip.hostAddress))
+                appendln(app.getText(when (state) {
                    IpNeighbour.State.INCOMPLETE -> R.string.connected_state_incomplete
                    IpNeighbour.State.VALID -> R.string.connected_state_valid
                    IpNeighbour.State.FAILED -> R.string.connected_state_failed
                    else -> throw IllegalStateException("Invalid IpNeighbour.State: $state")
-                }, ip.hostAddress))
+                }))
            }
-        }.toString().trimEnd()
+        }.trimEnd()
    }

+    fun obtainRecord() = record.value ?: ClientRecord(mac)
+
    override fun equals(other: Any?): Boolean {
        if (this === other) return true
        if (javaClass != other?.javaClass) return false
--- a/mobile/src/main/java/be/mygod/vpnhotspot/client/ClientViewModel.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/client/ClientViewModel.kt
@@ -12,6 +12,7 @@ import be.mygod.vpnhotspot.RepeaterService
 import be.mygod.vpnhotspot.net.IpNeighbour
 import be.mygod.vpnhotspot.net.TetheringManager
 import be.mygod.vpnhotspot.net.monitor.IpNeighbourMonitor
+import be.mygod.vpnhotspot.room.macToLong
 import be.mygod.vpnhotspot.util.broadcastReceiver

 class ClientViewModel : ViewModel(), ServiceConnection, IpNeighbourMonitor.Callback {
@@ -29,11 +30,12 @@ class ClientViewModel : ViewModel(), ServiceConnection, IpNeighbourMonitor.Callb
    val clients = MutableLiveData<List<Client>>()

    private fun populateClients() {
-        val clients = HashMap<Pair<String, String>, Client>()
+        val clients = HashMap<Pair<String, Long>, Client>()
        val group = repeater?.group
        val p2pInterface = group?.`interface`
        if (p2pInterface != null) {
-            for (client in p2p) clients[Pair(p2pInterface, client.deviceAddress)] = WifiP2pClient(p2pInterface, client)
+            for (client in p2p) clients[Pair(p2pInterface, client.deviceAddress.macToLong())] =
+                    WifiP2pClient(p2pInterface, client)
        }
        for (neighbour in neighbours) {
            val key = Pair(neighbour.dev, neighbour.lladdr)
@@ -45,7 +47,7 @@ class ClientViewModel : ViewModel(), ServiceConnection, IpNeighbourMonitor.Callb
            }
            client.ip += Pair(neighbour.ip, neighbour.state)
        }
-        this.clients.postValue(clients.values.sortedWith(compareBy<Client> { it.iface }.thenBy { it.mac }))
+        this.clients.postValue(clients.values.sortedWith(compareBy<Client> { it.iface }.thenBy { it.macString }))
    }

    private fun refreshP2p() {
--- a/mobile/src/main/java/be/mygod/vpnhotspot/client/ClientsFragment.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/client/ClientsFragment.kt
@@ -4,6 +4,7 @@ import android.content.DialogInterface
 import android.os.Bundle
 import android.text.format.DateUtils
 import android.text.format.Formatter
+import android.text.method.LinkMovementMethod
 import android.util.LongSparseArray
 import android.view.LayoutInflater
 import android.view.MenuItem
@@ -31,18 +32,27 @@ import be.mygod.vpnhotspot.databinding.FragmentClientsBinding
 import be.mygod.vpnhotspot.databinding.ListitemClientBinding
 import be.mygod.vpnhotspot.net.monitor.IpNeighbourMonitor
 import be.mygod.vpnhotspot.net.monitor.TrafficRecorder
-import be.mygod.vpnhotspot.room.*
+import be.mygod.vpnhotspot.room.AppDatabase
+import be.mygod.vpnhotspot.room.ClientStats
+import be.mygod.vpnhotspot.room.TrafficRecord
+import be.mygod.vpnhotspot.room.macToString
+import be.mygod.vpnhotspot.util.MainScope
+import be.mygod.vpnhotspot.util.SpanFormatter
 import be.mygod.vpnhotspot.util.computeIfAbsentCompat
 import be.mygod.vpnhotspot.util.toPluralInt
 import be.mygod.vpnhotspot.widget.SmartSnackbar
+import kotlinx.coroutines.CoroutineStart
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
 import java.text.NumberFormat

-class ClientsFragment : Fragment() {
-    data class NicknameArg(val mac: String, val nickname: CharSequence) : VersionedParcelable
+class ClientsFragment : Fragment(), MainScope by MainScope.Supervisor() {
+    data class NicknameArg(val mac: Long, val nickname: CharSequence) : VersionedParcelable
    class NicknameDialogFragment : AlertDialogFragment<NicknameArg, Empty>() {
        override fun AlertDialog.Builder.prepare(listener: DialogInterface.OnClickListener) {
            setView(R.layout.dialog_nickname)
-            setTitle(getString(R.string.clients_nickname_title, arg.mac))
+            setTitle(getString(R.string.clients_nickname_title, arg.mac.macToString()))
            setPositiveButton(android.R.string.ok, listener)
            setNegativeButton(android.R.string.cancel, null)
        }
@@ -53,16 +63,19 @@ class ClientsFragment : Fragment() {
        }

        override fun onClick(dialog: DialogInterface?, which: Int) {
-            AppDatabase.instance.clientRecordDao.upsert(arg.mac.macToLong()) {
+            GlobalScope.launch(Dispatchers.Main, CoroutineStart.UNDISPATCHED) {
+                MacLookup.abort(arg.mac)
+                AppDatabase.instance.clientRecordDao.upsert(arg.mac) {
                    nickname = this@NicknameDialogFragment.dialog!!.findViewById<EditText>(android.R.id.edit).text
                }
            }
        }
+    }

    data class StatsArg(val title: CharSequence, val stats: ClientStats) : VersionedParcelable
    class StatsDialogFragment : AlertDialogFragment<StatsArg, Empty>() {
        override fun AlertDialog.Builder.prepare(listener: DialogInterface.OnClickListener) {
-            setTitle(getString(R.string.clients_stats_title, arg.title))
+            setTitle(SpanFormatter.format(getString(R.string.clients_stats_title), arg.title))
            val context = context
            val resources = resources
            val format = NumberFormat.getIntegerInstance(resources.configuration.locale)
@@ -93,8 +106,9 @@ class ClientsFragment : Fragment() {
    private inner class ClientViewHolder(val binding: ListitemClientBinding) : RecyclerView.ViewHolder(binding.root),
            View.OnClickListener, PopupMenu.OnMenuItemClickListener {
        init {
-            binding.setLifecycleOwner(this@ClientsFragment) // todo some way better?
+            binding.setLifecycleOwner(this@ClientsFragment)
            binding.root.setOnClickListener(this)
+            binding.description.movementMethod = LinkMovementMethod.getInstance()
        }

        override fun onClick(v: View) {
@@ -116,11 +130,10 @@ class ClientsFragment : Fragment() {
                }
                R.id.block, R.id.unblock -> {
                    val client = binding.client ?: return false
-                    val wasWorking = TrafficRecorder.isWorking(client.mac.macToLong())
-                    client.record.apply {
-                        val value = value ?: ClientRecord(client.mac.macToLong())
-                        value.blocked = !value.blocked
-                        AppDatabase.instance.clientRecordDao.update(value)
+                    val wasWorking = TrafficRecorder.isWorking(client.mac)
+                    client.obtainRecord().apply {
+                        blocked = !blocked
+                        AppDatabase.instance.clientRecordDao.update(this)
                    }
                    IpNeighbourMonitor.instance?.flush()
                    if (!wasWorking && item.itemId == R.id.block) {
@@ -129,10 +142,13 @@ class ClientsFragment : Fragment() {
                    true
                }
                R.id.stats -> {
-                    val client = binding.client ?: return false
-                    StatsDialogFragment().withArg(StatsArg(client.title.value!!, // todo?
-                            AppDatabase.instance.trafficRecordDao.queryStats(client.mac.macToLong())))
-                            .show(fragmentManager ?: return false, "StatsDialogFragment")
+                    binding.client?.let { client ->
+                        launch(start = CoroutineStart.UNDISPATCHED) {
+                            StatsDialogFragment().withArg(StatsArg(client.title.value!!,
+                                    AppDatabase.instance.trafficRecordDao.queryStats(client.mac)))
+                                    .show(fragmentManager ?: return@launch, "StatsDialogFragment")
+                        }
+                    }
                    true
                }
                else -> false
@@ -153,7 +169,7 @@ class ClientsFragment : Fragment() {
            val client = getItem(position)
            holder.binding.client = client
            holder.binding.rate =
-                    rates.computeIfAbsentCompat(Pair(client.iface, client.mac.macToLong())) { TrafficRate() }
+                    rates.computeIfAbsentCompat(Pair(client.iface, client.mac)) { TrafficRate() }
            holder.binding.executePendingBindings()
        }

@@ -211,4 +227,9 @@ class ClientsFragment : Fragment() {
        TrafficRecorder.foregroundListeners -= this
        super.onStop()
    }
+
+    override fun onDestroy() {
+        job.cancel()
+        super.onDestroy()
+    }
 }
--- a/mobile/src/main/java/be/mygod/vpnhotspot/client/MacLookup.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/client/MacLookup.kt
@@ -0,0 +1,62 @@
+package be.mygod.vpnhotspot.client
+
+import androidx.annotation.MainThread
+import be.mygod.vpnhotspot.room.AppDatabase
+import be.mygod.vpnhotspot.room.macToString
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
+import org.json.JSONException
+import org.json.JSONObject
+import timber.log.Timber
+import java.io.IOException
+import java.net.HttpURLConnection
+import java.net.URL
+
+/**
+ * This class generates a default nickname for new clients.
+ */
+object MacLookup {
+    class UnexpectedError(mac: Long, val error: String) :
+            JSONException("Server returned error for ${mac.macToString()}: $error")
+
+    private val macLookupBusy = mutableMapOf<Long, Pair<HttpURLConnection, Job>>()
+    private val countryCodeRegex = "[A-Z]{2}".toRegex()
+
+    @MainThread
+    fun abort(mac: Long) = macLookupBusy.remove(mac)?.let { (conn, job) ->
+        job.cancel()
+        conn.disconnect()
+    }
+
+    @MainThread
+    fun perform(mac: Long) {
+        abort(mac)
+        val conn = URL("https://macvendors.co/api/" + mac.macToString()).openConnection() as HttpURLConnection
+        macLookupBusy[mac] = conn to GlobalScope.launch(Dispatchers.IO) {
+            try {
+                val response = conn.inputStream.bufferedReader().readText()
+                val obj = JSONObject(response).getJSONObject("result")
+                obj.optString("error", null)?.also { throw UnexpectedError(mac, it) }
+                val company = obj.getString("company")
+                val country = obj.optString("country")
+                if (countryCodeRegex.matchEntire(country) == null) Timber.w(UnexpectedError(mac, response))
+                val result = if (country != null) {
+                    String(country.flatMap { listOf('\uD83C', it + 0xDDA5) }.toCharArray()) + ' ' + company
+                } else company
+                AppDatabase.instance.clientRecordDao.upsert(mac) {
+                    nickname = result
+                    macLookupPending = false
+                }
+            } catch (e: IOException) {
+                Timber.d(e)
+            } catch (e: JSONException) {
+                if ((e as? UnexpectedError)?.error == "no result") {
+                    // no vendor found, we should not retry in the future
+                    AppDatabase.instance.clientRecordDao.upsert(mac) { macLookupPending = false }
+                } else Timber.w(e)
+            }
+        }
+    }
+}
--- a/mobile/src/main/java/be/mygod/vpnhotspot/client/WifiP2pClient.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/client/WifiP2pClient.kt
@@ -2,7 +2,8 @@ package be.mygod.vpnhotspot.client

 import android.net.wifi.p2p.WifiP2pDevice
 import be.mygod.vpnhotspot.net.TetherType
+import be.mygod.vpnhotspot.room.macToLong

-class WifiP2pClient(p2pInterface: String, p2p: WifiP2pDevice) : Client(p2p.deviceAddress ?: "", p2pInterface) {
+class WifiP2pClient(p2pInterface: String, p2p: WifiP2pDevice) : Client(p2p.deviceAddress!!.macToLong(), p2pInterface) {
    override val icon: Int get() = TetherType.WIFI_P2P.icon
 }
--- a/mobile/src/main/java/be/mygod/vpnhotspot/manage/InterfaceManager.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/manage/InterfaceManager.kt
@@ -35,7 +35,7 @@ class InterfaceManager(private val parent: TetheringFragment, val iface: String)
        override val active get() = parent.binder?.isActive(iface) == true
    }

-    val addresses = parent.ifaceLookup[iface]?.formatAddresses() ?: ""
+    private val addresses = parent.ifaceLookup[iface]?.formatAddresses() ?: ""
    override val type get() = VIEW_TYPE_INTERFACE
    private val data = Data()

--- a/mobile/src/main/java/be/mygod/vpnhotspot/manage/RepeaterManager.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/manage/RepeaterManager.kt
@@ -8,6 +8,7 @@ import android.net.wifi.WifiConfiguration
 import android.net.wifi.p2p.WifiP2pGroup
 import android.os.Bundle
 import android.os.IBinder
+import android.text.method.LinkMovementMethod
 import android.view.WindowManager
 import android.widget.EditText
 import androidx.appcompat.app.AlertDialog
@@ -32,7 +33,11 @@ import java.net.NetworkInterface
 import java.net.SocketException

 class RepeaterManager(private val parent: TetheringFragment) : Manager(), ServiceConnection {
-    class ViewHolder(val binding: ListitemRepeaterBinding) : RecyclerView.ViewHolder(binding.root)
+    class ViewHolder(val binding: ListitemRepeaterBinding) : RecyclerView.ViewHolder(binding.root) {
+        init {
+            binding.addresses.movementMethod = LinkMovementMethod.getInstance()
+        }
+    }
    inner class Data : BaseObservable() {
        val switchEnabled: Boolean
            @Bindable get() = when (binder?.service?.status) {
--- a/mobile/src/main/java/be/mygod/vpnhotspot/net/IpNeighbour.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/net/IpNeighbour.kt
@@ -1,5 +1,6 @@
 package be.mygod.vpnhotspot.net

+import be.mygod.vpnhotspot.room.macToLong
 import be.mygod.vpnhotspot.util.parseNumericAddress
 import timber.log.Timber
 import java.io.File
@@ -8,7 +9,7 @@ import java.net.InetAddress
 import java.net.NetworkInterface
 import java.net.SocketException

-data class IpNeighbour(val ip: InetAddress, val dev: String, val lladdr: String, val state: State) {
+data class IpNeighbour(val ip: InetAddress, val dev: String, val lladdr: Long, val state: State) {
    enum class State {
        INCOMPLETE, VALID, FAILED, DELETING
    }
@@ -50,13 +51,13 @@ data class IpNeighbour(val ip: InetAddress, val dev: String, val lladdr: String,
                        "NOARP" -> return emptyList()   // skip
                        else -> throw IllegalArgumentException("Unknown state encountered: ${match.groupValues[7]}")
                    }
-                val result = IpNeighbour(ip, dev, lladdr, state)
+                val result = IpNeighbour(ip, dev, lladdr.macToLong(), state)
                val devParser = devFallback.matchEntire(dev)
                if (devParser != null) try {
                    val index = devParser.groupValues[1].toInt()
                    val iface = NetworkInterface.getByIndex(index)
                    if (iface == null) Timber.w("Failed to find network interface #$index")
-                    else return listOf(IpNeighbour(ip, iface.name, lladdr, state), result)
+                    else return listOf(IpNeighbour(ip, iface.name, lladdr.macToLong(), state), result)
                } catch (_: SocketException) { }
                listOf(result)
            } catch (e: Exception) {
--- a/mobile/src/main/java/be/mygod/vpnhotspot/net/Routing.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/net/Routing.kt
@@ -8,10 +8,10 @@ import be.mygod.vpnhotspot.net.monitor.IpNeighbourMonitor
 import be.mygod.vpnhotspot.net.monitor.TrafficRecorder
 import be.mygod.vpnhotspot.net.monitor.UpstreamMonitor
 import be.mygod.vpnhotspot.room.AppDatabase
-import be.mygod.vpnhotspot.room.macToLong
 import be.mygod.vpnhotspot.util.RootSession
 import be.mygod.vpnhotspot.util.computeIfAbsentCompat
 import be.mygod.vpnhotspot.widget.SmartSnackbar
+import kotlinx.coroutines.runBlocking
 import timber.log.Timber
 import java.net.*
 import java.util.concurrent.atomic.AtomicLong
@@ -146,7 +146,7 @@ class Routing(val downstream: String, ownerAddress: InterfaceAddress? = null) :
    }
    private val upstream = Upstream(RULE_PRIORITY_UPSTREAM)

-    private inner class Client(private val ip: Inet4Address, mac: String) : AutoCloseable {
+    private inner class Client(private val ip: Inet4Address, mac: Long) : AutoCloseable {
        private val transaction = RootSession.beginTransaction().safeguard {
            val address = ip.hostAddress
            iptablesInsert("vpnhotspot_fwd -i $downstream -s $address -j ACCEPT")
@@ -172,7 +172,8 @@ class Routing(val downstream: String, ownerAddress: InterfaceAddress? = null) :
        val toRemove = HashSet(clients.keys)
        for (neighbour in neighbours) {
            if (neighbour.dev != downstream || neighbour.ip !is Inet4Address ||
-                    AppDatabase.instance.clientRecordDao.lookup(neighbour.lladdr.macToLong())?.blocked == true) continue
+                    runBlocking { AppDatabase.instance.clientRecordDao.lookup(neighbour.lladdr) }
+                            ?.blocked == true) continue
            toRemove.remove(neighbour.ip)
            try {
                clients.computeIfAbsentCompat(neighbour.ip) { Client(neighbour.ip, neighbour.lladdr) }
--- a/mobile/src/main/java/be/mygod/vpnhotspot/net/monitor/IpNeighbourMonitor.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/net/monitor/IpNeighbourMonitor.kt
@@ -1,7 +1,9 @@
 package be.mygod.vpnhotspot.net.monitor

-import be.mygod.vpnhotspot.App.Companion.app
 import be.mygod.vpnhotspot.net.IpNeighbour
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
 import java.net.InetAddress
 import java.util.*
 import java.util.concurrent.ConcurrentHashMap
@@ -61,7 +63,7 @@ class IpNeighbourMonitor private constructor() : IpMonitor() {

    private fun postUpdateLocked() {
        if (updatePosted || instance != this) return
-        app.handler.post {
+        GlobalScope.launch(Dispatchers.Main) {
            val neighbours = synchronized(neighbours) {
                updatePosted = false
                neighbours.values.toList()
--- a/mobile/src/main/java/be/mygod/vpnhotspot/net/monitor/TrafficRecorder.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/net/monitor/TrafficRecorder.kt
@@ -6,7 +6,6 @@ import be.mygod.vpnhotspot.DebugHelper
 import be.mygod.vpnhotspot.net.Routing.Companion.IPTABLES
 import be.mygod.vpnhotspot.room.AppDatabase
 import be.mygod.vpnhotspot.room.TrafficRecord
-import be.mygod.vpnhotspot.room.macToLong
 import be.mygod.vpnhotspot.util.Event2
 import be.mygod.vpnhotspot.util.RootSession
 import be.mygod.vpnhotspot.util.parseNumericAddress
@@ -24,11 +23,8 @@ object TrafficRecorder {
    private val records = HashMap<Pair<InetAddress, String>, TrafficRecord>()
    val foregroundListeners = Event2<Collection<TrafficRecord>, LongSparseArray<TrafficRecord>>()

-    fun register(ip: InetAddress, downstream: String, mac: String) {
-        val record = TrafficRecord(
-                mac = mac.macToLong(),
-                ip = ip,
-                downstream = downstream)
+    fun register(ip: InetAddress, downstream: String, mac: Long) {
+        val record = TrafficRecord(mac = mac, ip = ip, downstream = downstream)
        AppDatabase.instance.trafficRecordDao.insert(record)
        synchronized(this) {
            DebugHelper.log(TAG, "Registering $ip%$downstream")
--- a/mobile/src/main/java/be/mygod/vpnhotspot/room/AppDatabase.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/room/AppDatabase.kt
@@ -4,9 +4,11 @@ import androidx.room.Database
 import androidx.room.Room
 import androidx.room.RoomDatabase
 import androidx.room.TypeConverters
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
 import be.mygod.vpnhotspot.App.Companion.app

-@Database(entities = [ClientRecord::class, TrafficRecord::class], version = 1)
+@Database(entities = [ClientRecord::class, TrafficRecord::class], version = 2)
@TypeConverters(Converters::class)
 abstract class AppDatabase : RoomDatabase() {
    companion object {
@@ -14,6 +16,9 @@ abstract class AppDatabase : RoomDatabase() {

        val instance by lazy {
            Room.databaseBuilder(app.deviceStorage, AppDatabase::class.java, DB_NAME)
+                    .addMigrations(
+                            Migration2
+                    )
                    .allowMainThreadQueries()
                    .build()
        }
@@ -21,4 +26,9 @@ abstract class AppDatabase : RoomDatabase() {

    abstract val clientRecordDao: ClientRecord.Dao
    abstract val trafficRecordDao: TrafficRecord.Dao
+
+    object Migration2 : Migration(1, 2) {
+        override fun migrate(database: SupportSQLiteDatabase) =
+            database.execSQL("ALTER TABLE `ClientRecord` ADD COLUMN `macLookupPending` INTEGER NOT NULL DEFAULT 1")
+    }
 }
--- a/mobile/src/main/java/be/mygod/vpnhotspot/room/ClientRecord.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/room/ClientRecord.kt
@@ -7,13 +7,14 @@ import androidx.room.*
 data class ClientRecord(@PrimaryKey
                        val mac: Long,
                        var nickname: CharSequence = "",
-                        var blocked: Boolean = false) {
+                        var blocked: Boolean = false,
+                        var macLookupPending: Boolean = true) {
    @androidx.room.Dao
    abstract class Dao {
        @Query("SELECT * FROM `ClientRecord` WHERE `mac` = :mac")
-        abstract fun lookup(mac: Long): ClientRecord?
+        abstract suspend fun lookup(mac: Long): ClientRecord?

-        fun lookupOrDefault(mac: Long) = lookup(mac) ?: ClientRecord(mac)
+        suspend fun lookupOrDefault(mac: Long) = lookup(mac) ?: ClientRecord(mac)

        @Query("SELECT * FROM `ClientRecord` WHERE `mac` = :mac")
        abstract fun lookupSync(mac: Long): LiveData<ClientRecord>
@@ -23,7 +24,7 @@ data class ClientRecord(@PrimaryKey
        fun update(value: ClientRecord) = check(updateInternal(value) == value.mac)

        @Transaction
-        open fun upsert(mac: Long, operation: ClientRecord.() -> Unit) = lookupOrDefault(mac).apply {
+        open suspend fun upsert(mac: Long, operation: ClientRecord.() -> Unit) = lookupOrDefault(mac).apply {
            operation()
            update(this)
        }
--- a/mobile/src/main/java/be/mygod/vpnhotspot/room/Converters.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/room/Converters.kt
@@ -50,8 +50,9 @@ fun String.macToLong(): Long = ByteBuffer.allocate(8).run {
    long
 }

+fun Iterable<Byte>.macToString() = joinToString(":") { "%02x".format(it) }
 fun Long.macToString(): String = ByteBuffer.allocate(8).run {
    order(ByteOrder.LITTLE_ENDIAN)
    putLong(this@macToString)
-    array().take(6).joinToString(":") { "%02x".format(it) }
+    array().take(6).macToString()
 }
--- a/mobile/src/main/java/be/mygod/vpnhotspot/room/TrafficRecord.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/room/TrafficRecord.kt
@@ -55,8 +55,9 @@ data class TrafficRecord(
                    SUM(TrafficRecord.receivedBytes) AS receivedBytes
                FROM TrafficRecord LEFT JOIN TrafficRecord AS Next ON TrafficRecord.id = Next.previousId
                /* We only want to find the last record for each chain so that we don't double count */
-                WHERE TrafficRecord.mac = :mac AND Next.id IS NULL""")
-        abstract fun queryStats(mac: Long): ClientStats
+                WHERE TrafficRecord.mac = :mac AND Next.id IS NULL
+                """)
+        abstract suspend fun queryStats(mac: Long): ClientStats
    }
 }

--- a/mobile/src/main/java/be/mygod/vpnhotspot/util/CustomTabsUrlSpan.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/util/CustomTabsUrlSpan.kt
@@ -0,0 +1,8 @@
+package be.mygod.vpnhotspot.util
+
+import android.text.style.URLSpan
+import android.view.View
+
+class CustomTabsUrlSpan(url: String) : URLSpan(url) {
+    override fun onClick(widget: View) = widget.context.launchUrl(url)
+}
--- a/mobile/src/main/java/be/mygod/vpnhotspot/util/MainScope.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/util/MainScope.kt
@@ -0,0 +1,14 @@
+package be.mygod.vpnhotspot.util
+
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.SupervisorJob
+
+interface MainScope : CoroutineScope {
+    class Supervisor : MainScope {
+        override val job = SupervisorJob()
+    }
+    val job: Job
+    override val coroutineContext get() = Dispatchers.Main + job
+}
--- a/mobile/src/main/java/be/mygod/vpnhotspot/util/SpanFormatter.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/util/SpanFormatter.kt
@@ -0,0 +1,85 @@
+package be.mygod.vpnhotspot.util
+
+import android.text.Spannable
+import android.text.SpannableStringBuilder
+import android.text.Spanned
+import android.text.SpannedString
+import java.util.*
+
+/**
+ * Provides [String.format] style functions that work with [Spanned] strings and preserve formatting.
+ *
+ * https://github.com/george-steel/android-utils/blob/289aff11e53593a55d780f9f5986e49343a79e55/src/org/oshkimaadziig/george/androidutils/SpanFormatter.java
+ *
+ * @author George T. Steel
+ */
+object SpanFormatter {
+    private val formatSequence = "%([0-9]+\\$|<?)([^a-zA-z%]*)([[a-zA-Z%]&&[^tT]]|[tT][a-zA-Z])".toPattern()
+
+    /**
+     * Version of [String.format] that works on [Spanned] strings to preserve rich text formatting.
+     * Both the `format` as well as any `%s args` can be Spanned and will have their formatting preserved.
+     * Due to the way [Spannable]s work, any argument's spans will can only be included **once** in the result.
+     * Any duplicates will appear as text only.
+     *
+     * @param format the format string (see [java.util.Formatter.format])
+     * @param args
+     * the list of arguments passed to the formatter. If there are
+     * more arguments than required by `format`,
+     * additional arguments are ignored.
+     * @return the formatted string (with spans).
+     */
+    fun format(format: CharSequence, vararg args: Any) = format(Locale.getDefault(), format, *args)
+
+    /**
+     * Version of [String.format] that works on [Spanned] strings to preserve rich text formatting.
+     * Both the `format` as well as any `%s args` can be Spanned and will have their formatting preserved.
+     * Due to the way [Spannable]s work, any argument's spans will can only be included **once** in the result.
+     * Any duplicates will appear as text only.
+     *
+     * @param locale
+     * the locale to apply; `null` value means no localization.
+     * @param format the format string (see [java.util.Formatter.format])
+     * @param args
+     * the list of arguments passed to the formatter.
+     * @return the formatted string (with spans).
+     * @see String.format
+     */
+    fun format(locale: Locale, format: CharSequence, vararg args: Any): SpannedString {
+        val out = SpannableStringBuilder(format)
+
+        var i = 0
+        var argAt = -1
+
+        while (i < out.length) {
+            val m = formatSequence.matcher(out)
+            if (!m.find(i)) break
+            i = m.start()
+            val exprEnd = m.end()
+
+            val argTerm = m.group(1)
+            val modTerm = m.group(2)
+            val typeTerm = m.group(3)
+
+            val cookedArg = when (typeTerm) {
+                "%" -> "%"
+                "n" -> "\n"
+                else -> {
+                    val argItem = args[when (argTerm) {
+                        "" -> ++argAt
+                        "<" -> argAt
+                        else -> Integer.parseInt(argTerm.substring(0, argTerm.length - 1)) - 1
+                    }]
+                    if (typeTerm == "s" && argItem is Spanned) argItem else {
+                        String.format(locale, "%$modTerm$typeTerm", argItem)
+                    }
+                }
+            }
+
+            out.replace(i, exprEnd, cookedArg)
+            i += cookedArg.length
+        }
+
+        return SpannedString(out)
+    }
+}
--- a/mobile/src/main/java/be/mygod/vpnhotspot/util/Utils.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/util/Utils.kt
@@ -4,11 +4,18 @@ import android.content.*
 import android.os.Build
 import android.system.Os
 import android.system.OsConstants
+import android.text.Spannable
+import android.text.SpannableString
+import android.text.SpannableStringBuilder
 import android.view.View
 import android.widget.ImageView
 import androidx.annotation.DrawableRes
+import androidx.core.net.toUri
 import androidx.core.view.isVisible
 import androidx.databinding.BindingAdapter
+import be.mygod.vpnhotspot.App.Companion.app
+import be.mygod.vpnhotspot.room.macToString
+import be.mygod.vpnhotspot.widget.SmartSnackbar
 import java.net.InetAddress
 import java.net.NetworkInterface
 import java.net.SocketException
@@ -43,20 +50,40 @@ fun setVisibility(view: View, value: Boolean) {
    view.isVisible = value
 }

-fun NetworkInterface.formatAddresses() =
-        (interfaceAddresses.asSequence()
-                .map { "${it.address.hostAddress}/${it.networkPrefixLength}" }
-                .toList() +
-                listOfNotNull(try {
-                    hardwareAddress?.joinToString(":") { "%02x".format(it) }
-                } catch (_: SocketException) {
-                    null
-                }))
-                .joinToString("\n")
+fun makeIpSpan(ip: String) = SpannableString(ip).apply {
+    if (app.hasTouch) {
+        val filteredIp = ip.split('%', limit = 2).first()
+        setSpan(CustomTabsUrlSpan("https://ipinfo.io/$filteredIp"), 0, filteredIp.length,
+                Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
+    }
+}
+fun makeMacSpan(mac: String) = SpannableString(mac).apply {
+    if (app.hasTouch) {
+        setSpan(CustomTabsUrlSpan("https://macvendors.co/results/$mac"), 0, length, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
+    }
+}
+
+fun NetworkInterface.formatAddresses() = SpannableStringBuilder().apply {
+    try {
+        hardwareAddress?.apply { appendln(makeMacSpan(asIterable().macToString())) }
+    } catch (_: SocketException) { }
+    for (address in interfaceAddresses) {
+        append(makeIpSpan(address.address.hostAddress))
+        appendln("/${address.networkPrefixLength}")
+    }
+}.trimEnd()

 fun parseNumericAddress(address: String?): InetAddress? =
        Os.inet_pton(OsConstants.AF_INET, address) ?: Os.inet_pton(OsConstants.AF_INET6, address)

+fun Context.launchUrl(url: String) {
+    if (app.hasTouch) try {
+        app.customTabsIntent.launchUrl(this, url.toUri())
+        return
+    } catch (_: ActivityNotFoundException) { } catch (_: SecurityException) { }
+    SmartSnackbar.make(url).show()
+}
+
 fun Context.stopAndUnbind(connection: ServiceConnection) {
    connection.onServiceDisconnected(null)
    unbindService(connection)
--- a/mobile/src/main/java/be/mygod/vpnhotspot/widget/AutoCollapseTextView.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/widget/AutoCollapseTextView.kt
@@ -2,12 +2,11 @@ package be.mygod.vpnhotspot.widget

 import android.content.Context
 import android.util.AttributeSet
-import androidx.appcompat.widget.AppCompatTextView
 import androidx.core.view.isGone

 class AutoCollapseTextView @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null,
                                                     defStyleAttr: Int = android.R.attr.textViewStyle) :
-        AppCompatTextView(context, attrs, defStyleAttr) {
+        LinkTextView(context, attrs, defStyleAttr) {
    override fun onTextChanged(text: CharSequence?, start: Int, lengthBefore: Int, lengthAfter: Int) {
        super.onTextChanged(text, start, lengthBefore, lengthAfter)
        isGone = text.isNullOrEmpty()
--- a/mobile/src/main/java/be/mygod/vpnhotspot/widget/LinkTextView.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/widget/LinkTextView.kt
@@ -0,0 +1,15 @@
+package be.mygod.vpnhotspot.widget
+
+import android.content.Context
+import android.text.method.LinkMovementMethod
+import android.util.AttributeSet
+import androidx.appcompat.widget.AppCompatTextView
+
+open class LinkTextView @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null,
+                                                  defStyleAttr: Int = android.R.attr.textViewStyle) :
+        AppCompatTextView(context, attrs, defStyleAttr) {
+    override fun setTextIsSelectable(selectable: Boolean) {
+        super.setTextIsSelectable(selectable)
+        movementMethod = LinkMovementMethod.getInstance()   // override what was set in setTextIsSelectable
+    }
+}
--- a/mobile/src/main/res/layout/listitem_client.xml
+++ b/mobile/src/main/res/layout/listitem_client.xml
@@ -36,15 +36,16 @@
            android:layout_weight="1"
            android:orientation="vertical">

-            <TextView
+            <be.mygod.vpnhotspot.widget.LinkTextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@{client.title}"
                android:textAppearance="@style/TextAppearance.AppCompat.Subhead"
-                android:textIsSelectable="@{client.record.nickname.length() == 0}"
+                android:textIsSelectable="@{client.titleSelectable}"
                tools:text="01:23:45:ab:cd:ef%p2p-p2p0-0"/>

            <be.mygod.vpnhotspot.widget.AutoCollapseTextView
+                android:id="@+id/description"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@{client.description}"
--- a/mobile/src/main/res/layout/listitem_interface.xml
+++ b/mobile/src/main/res/layout/listitem_interface.xml
@@ -41,6 +41,7 @@
                tools:text="wlan0"/>

            <be.mygod.vpnhotspot.widget.AutoCollapseTextView
+                android:id="@+id/text"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@{data.text}"
--- a/mobile/src/main/res/layout/listitem_repeater.xml
+++ b/mobile/src/main/res/layout/listitem_repeater.xml
@@ -44,6 +44,7 @@
                    android:textAppearance="@style/TextAppearance.AppCompat.Subhead"/>

                <be.mygod.vpnhotspot.widget.AutoCollapseTextView
+                    android:id="@+id/addresses"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="@{data.addresses}"
--- a/mobile/src/main/res/values-zh-rCN/strings.xml
+++ b/mobile/src/main/res/values-zh-rCN/strings.xml
@@ -54,9 +54,9 @@
    <string name="tethering_manage_bluetooth">蓝牙网络共享</string>
    <string name="tethering_manage_failed">Android 系统无法打开网络共享。</string>

-    <string name="connected_state_incomplete">%s (正在连接)</string>
-    <string name="connected_state_valid">%s (已连上)</string>
-    <string name="connected_state_failed">%s (已断开)</string>
+    <string name="connected_state_incomplete">（正在连接）</string>
+    <string name="connected_state_valid">（已连上）</string>
+    <string name="connected_state_failed">（已断开）</string>

    <string name="clients_popup_nickname">昵称…</string>
    <string name="clients_popup_block">拉黑</string>
--- a/mobile/src/main/res/values/strings.xml
+++ b/mobile/src/main/res/values/strings.xml
@@ -58,9 +58,9 @@
    <string name="tethering_manage_bluetooth">Bluetooth tethering</string>
    <string name="tethering_manage_failed">Android system has failed to start tethering.</string>

-    <string name="connected_state_incomplete">%s (connecting)</string>
-    <string name="connected_state_valid">%s (reachable)</string>
-    <string name="connected_state_failed">%s (lost)</string>
+    <string name="connected_state_incomplete">" (connecting)"</string>
+    <string name="connected_state_valid">" (reachable)"</string>
+    <string name="connected_state_failed">" (lost)"</string>

    <string name="clients_popup_nickname">Nickname…</string>
    <string name="clients_popup_block">Block</string>