Merge branch 'main' into main

2025-10-31 01:05:08 +03:00 · 2022-10-30 21:35:44 +00:00 · 2022-10-30 21:35:44 +00:00 · 29c77f0185
commit 29c77f0185
parent 67890d7287 24bcee7934
18 changed files with 629 additions and 89 deletions
--- a/.github/workflows/android.yml
+++ b/.github/workflows/android.yml
@ -55,7 +55,14 @@ jobs:
      env:
        ANDROID_NDK_HOME: ${{ steps.setup-ndk.outputs.ndk-path }}

-    - name: Gradle build
+    - name: Gradle build  
+      if: github.ref_name != 'main'
+      run: |
+        chmod +x gradlew
+        ./gradlew buildRelease
+
+    - name: Gradle signed build
+      if: github.ref_name == 'main'
      run: |
        echo "${{ secrets.RELEASE_KEYSTORE }}" > app/gha.keystore.asc
        gpg -d --passphrase "${{ secrets.RELEASE_KEYSTORE_PASSWORD }}" --batch app/gha.keystore.asc > app/gha.jks
@ -63,6 +70,7 @@ jobs:
        ./gradlew assembleYggdrasil

    - name: Upload artifact
+      if: github.ref_name == 'main'
      uses: actions/upload-artifact@v3
      with:
        name: yggdrasil-android
--- a/.github/workflows/nightlylink.yml
+++ b/.github/workflows/nightlylink.yml
@ -1,62 +0,0 @@
-name: Comment
-on:
-  workflow_run:
-    workflows: ['Build']
-    types: [completed]
-jobs:
-  pr_comment:
-    if: github.event.workflow_run.event == 'pull_request' && github.event.workflow_run.conclusion == 'success'
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/github-script@v6
-        with:
-          # This snippet is public-domain, taken from
-          # https://github.com/oprypin/nightly.link/blob/master/.github/workflows/pr-comment.yml
-          script: |
-            async function upsertComment(owner, repo, issue_number, purpose, body) {
-              const {data: comments} = await github.rest.issues.listComments(
-                {owner, repo, issue_number});
-
-              const marker = `<!-- bot: ${purpose} -->`;
-              body = marker + "\n" + body;
-
-              const existing = comments.filter((c) => c.body.includes(marker));
-              if (existing.length > 0) {
-                const last = existing[existing.length - 1];
-                core.info(`Updating comment ${last.id}`);
-                await github.rest.issues.updateComment({
-                  owner, repo,
-                  body,
-                  comment_id: last.id,
-                });
-              } else {
-                core.info(`Creating a comment in issue / PR #${issue_number}`);
-                await github.rest.issues.createComment({issue_number, body, owner, repo});
-              }
-            }
-
-            const {owner, repo} = context.repo;
-            const run_id = ${{github.event.workflow_run.id}};
-
-            const pull_requests = ${{ toJSON(github.event.workflow_run.pull_requests) }};
-            if (!pull_requests.length) {
-              return core.error("This workflow doesn't match any pull requests!");
-            }
-
-            const artifacts = await github.paginate(
-              github.rest.actions.listWorkflowRunArtifacts, {owner, repo, run_id});
-            if (!artifacts.length) {
-              return core.error(`No artifacts found`);
-            }
-            let body = `Download the artifacts for this pull request:\n`;
-            for (const art of artifacts) {
-              body += `\n* [${art.name}.zip](https://nightly.link/${owner}/${repo}/actions/artifacts/${art.id}.zip)`;
-            }
-
-            core.info("Review thread message body:", body);
-
-            for (const pr of pull_requests) {
-              await upsertComment(owner, repo, pr.number,
-                "nightly-link", body);
-            }
-
--- a/app/build.gradle
+++ b/app/build.gradle
@ -55,6 +55,7 @@ dependencies {
    implementation 'androidx.appcompat:appcompat:1.3.0'
    implementation 'com.google.android.material:material:1.3.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+    implementation 'androidx.preference:preference-ktx:1.1.0'
    testImplementation 'junit:junit:4.+'
    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@ -16,17 +16,19 @@
            android:parentActivityName=".MainActivity" />
        <activity android:name=".PeersActivity"
            android:parentActivityName=".MainActivity" />
-        <activity android:name=".MainActivity">
+        <activity android:name=".MainActivity" android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
+        <activity android:name=".DnsActivity" android:exported="false" />

        <service
            android:name=".PacketTunnelProvider"
-            android:permission="android.permission.BIND_VPN_SERVICE">
+            android:permission="android.permission.BIND_VPN_SERVICE"
+            android:exported="true">
            <intent-filter>
                <action android:name="android.net.VpnService" />
            </intent-filter>
--- a/app/src/main/java/eu/neilalexander/yggdrasil/DnsActivity.kt
+++ b/app/src/main/java/eu/neilalexander/yggdrasil/DnsActivity.kt
@ -0,0 +1,166 @@
+package eu.neilalexander.yggdrasil
+
+import android.annotation.SuppressLint
+import android.app.AlertDialog
+import android.content.SharedPreferences
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import android.view.ContextThemeWrapper
+import android.view.LayoutInflater
+import android.view.View
+import android.widget.*
+import com.google.android.material.textfield.TextInputEditText
+
+const val KEY_DNS_SERVERS = "dns_servers"
+const val KEY_ENABLE_CHROME_FIX = "enable_chrome_fix"
+const val DEFAULT_DNS_SERVERS = "302:7991::53,302:db60::53,300:6223::53,301:1088::53"
+
+class DnsActivity : AppCompatActivity() {
+    private lateinit var config: ConfigurationProxy
+    private lateinit var inflater: LayoutInflater
+
+    private lateinit var serversTableLayout: TableLayout
+    private lateinit var serversTableLabel: TextView
+    private lateinit var serversTableHint: TextView
+    private lateinit var addServerButton: ImageButton
+    private lateinit var enableChromeFix: Switch
+
+    private lateinit var servers: MutableList<String>
+    private lateinit var preferences: SharedPreferences
+
+    @SuppressLint("ApplySharedPref")
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_dns)
+
+        config = ConfigurationProxy(applicationContext)
+        inflater = LayoutInflater.from(this)
+
+        serversTableLayout = findViewById(R.id.configuredDnsTableLayout)
+        serversTableLabel = findViewById(R.id.configuredDnsLabel)
+        serversTableHint = findViewById(R.id.configuredDnsHint)
+        enableChromeFix = findViewById(R.id.enableChromeFix)
+
+        addServerButton = findViewById(R.id.addServerButton)
+        addServerButton.setOnClickListener {
+            val view = inflater.inflate(R.layout.dialog_add_dns_server, null)
+            val input = view.findViewById<TextInputEditText>(R.id.addDnsInput)
+            val builder: AlertDialog.Builder = AlertDialog.Builder(ContextThemeWrapper(this, R.style.Theme_MaterialComponents_DayNight_Dialog))
+            builder.setTitle(getString(R.string.dns_add_server_dialog_title))
+            builder.setView(view)
+            builder.setPositiveButton(getString(R.string.add)) { dialog, _ ->
+                servers.add(input.text.toString())
+                preferences.edit().apply {
+                    putString(KEY_DNS_SERVERS, servers.joinToString(","))
+                    commit()
+                }
+                dialog.dismiss()
+                updateConfiguredServers()
+            }
+            builder.setNegativeButton(getString(R.string.cancel)) { dialog, _ ->
+                dialog.cancel()
+            }
+            builder.show()
+        }
+
+        enableChromeFix.setOnCheckedChangeListener { _, isChecked ->
+            preferences.edit().apply {
+                putBoolean(KEY_ENABLE_CHROME_FIX, isChecked)
+                commit()
+            }
+        }
+
+        preferences = androidx.preference.PreferenceManager.getDefaultSharedPreferences(this.baseContext)
+        val serverString = preferences.getString(KEY_DNS_SERVERS, "")
+        servers = if (serverString!!.isNotEmpty()) {
+            serverString.split(",").toMutableList()
+        } else {
+            mutableListOf()
+        }
+        updateUsableServers()
+    }
+
+    override fun onResume() {
+        super.onResume()
+        updateConfiguredServers()
+        enableChromeFix.isChecked = preferences.getBoolean(KEY_ENABLE_CHROME_FIX, false)
+    }
+
+    @SuppressLint("ApplySharedPref")
+    private fun updateConfiguredServers() {
+        when (servers.size) {
+            0 -> {
+                serversTableLayout.visibility = View.GONE
+                serversTableLabel.text = getString(R.string.dns_no_configured_servers)
+                serversTableHint.text = getText(R.string.dns_configured_servers_hint_empty)
+            }
+            else -> {
+                serversTableLayout.visibility = View.VISIBLE
+                serversTableLabel.text = getString(R.string.dns_configured_servers)
+                serversTableHint.text = getText(R.string.dns_configured_servers_hint)
+
+                serversTableLayout.removeAllViewsInLayout()
+                for (i in servers.indices) {
+                    val server = servers[i]
+                    val view = inflater.inflate(R.layout.peers_configured, null)
+                    view.findViewById<TextView>(R.id.addressValue).text = server
+                    view.findViewById<ImageButton>(R.id.deletePeerButton).tag = i
+
+                    view.findViewById<ImageButton>(R.id.deletePeerButton).setOnClickListener { button ->
+                        val builder: AlertDialog.Builder = AlertDialog.Builder(this)
+                        builder.setTitle("Remove ${server}?")
+                        builder.setPositiveButton(getString(R.string.remove)) { dialog, _ ->
+                            servers.removeAt(button.tag as Int)
+                            preferences.edit().apply {
+                                this.putString(KEY_DNS_SERVERS, servers.joinToString(","))
+                                this.commit()
+                            }
+                            dialog.dismiss()
+                            updateConfiguredServers()
+                        }
+                        builder.setNegativeButton(getString(R.string.cancel)) { dialog, _ ->
+                            dialog.cancel()
+                        }
+                        builder.show()
+                    }
+                    serversTableLayout.addView(view)
+                }
+            }
+        }
+    }
+
+    @SuppressLint("ApplySharedPref")
+    private fun updateUsableServers() {
+        val usableTableLayout: TableLayout = findViewById(R.id.usableDnsTableLayout)
+        val defaultServers = DEFAULT_DNS_SERVERS.split(",")
+
+        defaultServers.forEach {
+            val server = it
+            val view = inflater.inflate(R.layout.dns_server_usable, null)
+            view.findViewById<TextView>(R.id.serverValue).text = server
+            val addButton = view.findViewById<ImageButton>(R.id.addButton)
+            addButton.tag = server
+
+            addButton.setOnClickListener { button ->
+                servers.add(button.tag as String)
+                preferences.edit().apply {
+                    this.putString(KEY_DNS_SERVERS, servers.joinToString(","))
+                    this.commit()
+                }
+                updateConfiguredServers()
+            }
+            view.setOnLongClickListener {
+                val builder: AlertDialog.Builder = AlertDialog.Builder(this)
+                builder.setTitle(getString(R.string.dns_server_info_dialog_title))
+                builder.setMessage(getText(R.string.dns_server_info_revertron))
+                builder.setPositiveButton(getString(R.string.ok)) { dialog, _ ->
+                    dialog.dismiss()
+                }
+                builder.show()
+                true
+            }
+
+            usableTableLayout.addView(view)
+        }
+    }
+}
--- a/app/src/main/java/eu/neilalexander/yggdrasil/MainActivity.kt
+++ b/app/src/main/java/eu/neilalexander/yggdrasil/MainActivity.kt
@ -25,6 +25,8 @@ class MainActivity : AppCompatActivity() {
    private lateinit var coordinatesLabel: TextView
    private lateinit var peersLabel: TextView
    private lateinit var peersRow: TableRow
+    private lateinit var dnsLabel: TextView
+    private lateinit var dnsRow: TableRow
    private lateinit var settingsRow: TableRow

    private fun start() {
@ -45,13 +47,15 @@ class MainActivity : AppCompatActivity() {

        findViewById<TextView>(R.id.versionValue).text = Mobile.getVersion()

-        enabledSwitch = findViewById(R.id.enableMulticastBeacon)
+        enabledSwitch = findViewById(R.id.enableYggdrasil)
        enabledLabel = findViewById(R.id.yggdrasilStatusLabel)
        ipAddressLabel = findViewById(R.id.ipAddressValue)
        subnetLabel = findViewById(R.id.subnetValue)
        coordinatesLabel = findViewById(R.id.coordinatesValue)
        peersLabel = findViewById(R.id.peersValue)
        peersRow = findViewById(R.id.peersTableRow)
+        dnsLabel = findViewById(R.id.dnsValue)
+        dnsRow = findViewById(R.id.dnsTableRow)
        settingsRow = findViewById(R.id.settingsTableRow)

        enabledLabel.setTextColor(Color.GRAY)
@ -80,6 +84,12 @@ class MainActivity : AppCompatActivity() {
            startActivity(intent)
        }

+        dnsRow.isClickable = true
+        dnsRow.setOnClickListener {
+            val intent = Intent(this, DnsActivity::class.java)
+            startActivity(intent)
+        }
+
        settingsRow.isClickable = true
        settingsRow.setOnClickListener {
            val intent = Intent(this, SettingsActivity::class.java)
@ -106,6 +116,18 @@ class MainActivity : AppCompatActivity() {
        LocalBroadcastManager.getInstance(this).registerReceiver(
            receiver, IntentFilter(PacketTunnelState.RECEIVER_INTENT)
        )
+        val preferences = androidx.preference.PreferenceManager.getDefaultSharedPreferences(this.baseContext)
+        val serverString = preferences.getString(KEY_DNS_SERVERS, "")
+        if (serverString!!.isNotEmpty()) {
+            val servers = serverString.split(",")
+            dnsLabel.text = when (servers.size) {
+                0 -> "No servers"
+                1 -> "1 server"
+                else -> "${servers.size} servers"
+            }
+        } else {
+            dnsLabel.text = "No servers"
+        }
    }

    private val receiver: BroadcastReceiver = object : BroadcastReceiver() {
--- a/app/src/main/java/eu/neilalexander/yggdrasil/PacketTunnelProvider.kt
+++ b/app/src/main/java/eu/neilalexander/yggdrasil/PacketTunnelProvider.kt
@ -17,6 +17,8 @@ import java.util.concurrent.atomic.AtomicBoolean
 import kotlin.concurrent.thread


+private const val TAG = "PacketTunnelProvider"
+
 class PacketTunnelProvider: VpnService() {
    companion object {
        const val RECEIVER_INTENT = "eu.neilalexander.yggdrasil.PacketTunnelProvider.MESSAGE"
@ -50,16 +52,16 @@ class PacketTunnelProvider: VpnService() {

    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
        if (intent == null) {
-            Log.d("PacketTunnelProvider", "Intent is null")
+            Log.d(TAG, "Intent is null")
            return START_NOT_STICKY
        }
        return when (intent.action ?: ACTION_STOP) {
            ACTION_STOP -> {
-                Log.d("PacketTunnelProvider", "Stopping...")
+                Log.d(TAG, "Stopping...")
                stop(); START_NOT_STICKY
            }
            else -> {
-                Log.d("PacketTunnelProvider", "Starting...")
+                Log.d(TAG, "Starting...")
                start(); START_STICKY
            }
        }
@ -70,11 +72,11 @@ class PacketTunnelProvider: VpnService() {
            return
        }

-        Log.d("PacketTunnelProvider", config.getJSON().toString())
+        Log.d(TAG, config.getJSON().toString())
        yggdrasil.startJSON(config.getJSONByteArray())

        val address = yggdrasil.addressString
-        var builder = Builder()
+        val builder = Builder()
            .addAddress(address, 7)
            .addRoute("200::", 7)
            // We do this to trick the DNS-resolver into thinking that we have "regular" IPv6,
@ -97,6 +99,21 @@ class PacketTunnelProvider: VpnService() {
            builder.setMetered(false)
        }

+        val preferences = androidx.preference.PreferenceManager.getDefaultSharedPreferences(this.baseContext)
+        val serverString = preferences.getString(KEY_DNS_SERVERS, "")
+        if (serverString!!.isNotEmpty()) {
+            val servers = serverString.split(",")
+            if (servers.isNotEmpty()) {
+                servers.forEach {
+                    Log.i(TAG, "Using DNS server $it")
+                    builder.addDnsServer(it)
+                }
+            }
+        }
+        if (preferences.getBoolean(KEY_ENABLE_CHROME_FIX, false)) {
+            builder.addRoute("2001:4860:4860::8888", 128)
+        }
+
        parcel = builder.establish()
        val parcel = parcel
        if (parcel == null || !parcel.fileDescriptor.valid()) {
@ -123,7 +140,7 @@ class PacketTunnelProvider: VpnService() {
        intent.putExtra("ip", yggdrasil.addressString)
        intent.putExtra("subnet", yggdrasil.subnetString)
        intent.putExtra("coords", yggdrasil.coordsString)
-        intent.putExtra("peers", JSONArray(yggdrasil.peersJSON).length())
+        intent.putExtra("peers", yggdrasil.peersJSON)
        LocalBroadcastManager.getInstance(this).sendBroadcast(intent)
    }

@ -214,7 +231,7 @@ class PacketTunnelProvider: VpnService() {
    }

    private fun reader() {
-        var b = ByteArray(65535)
+        val b = ByteArray(65535)
        reads@ while (started.get()) {
            val readerStream = readerStream
            val readerThread = readerThread
--- a/app/src/main/java/eu/neilalexander/yggdrasil/PeersActivity.kt
+++ b/app/src/main/java/eu/neilalexander/yggdrasil/PeersActivity.kt
@ -49,14 +49,14 @@ class PeersActivity : AppCompatActivity() {

        addPeerButton = findViewById(R.id.addPeerButton)
        addPeerButton.setOnClickListener {
-            var view = inflater.inflate(R.layout.dialog_addpeer, null)
-            var input = view.findViewById<TextInputEditText>(R.id.addPeerInput)
+            val view = inflater.inflate(R.layout.dialog_addpeer, null)
+            val input = view.findViewById<TextInputEditText>(R.id.addPeerInput)
            val builder: AlertDialog.Builder = AlertDialog.Builder(ContextThemeWrapper(this, R.style.Theme_MaterialComponents_DayNight_Dialog))
            builder.setTitle("Add Configured Peer")
            builder.setView(view)
            builder.setPositiveButton("Add") { dialog, _ ->
                config.updateJSON { json ->
-                    json.getJSONArray("Peers").put(input.text)
+                    json.getJSONArray("Peers").put(input.text.toString().trim())
                }
                dialog.dismiss()
                updateConfiguredPeers()
@ -90,7 +90,7 @@ class PeersActivity : AppCompatActivity() {
                configuredTableLayout.removeAllViewsInLayout()
                for (i in 0 until peers.length()) {
                    val peer = peers[i].toString()
-                    var view = inflater.inflate(R.layout.peers_configured, null)
+                    val view = inflater.inflate(R.layout.peers_configured, null)
                    view.findViewById<TextView>(R.id.addressValue).text = peer
                    view.findViewById<ImageButton>(R.id.deletePeerButton).tag = i

@ -130,7 +130,7 @@ class PeersActivity : AppCompatActivity() {
                connectedTableLayout.removeAllViewsInLayout()
                for (i in 0 until peers.length()) {
                    val peer = peers.getJSONObject(i)
-                    var view = inflater.inflate(R.layout.peers_connected, null)
+                    val view = inflater.inflate(R.layout.peers_connected, null)
                    val ip = peer.getString("IP")
                    view.findViewById<TextView>(R.id.addressLabel).text = ip
                    view.findViewById<TextView>(R.id.detailsLabel).text = peer.getString("Remote")
--- a/app/src/main/res/layout/activity_dns.xml
+++ b/app/src/main/res/layout/activity_dns.xml
@ -0,0 +1,245 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".DnsActivity">
+
+    <FrameLayout
+        android:id="@+id/settings"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:dividerPadding="4pt"
+            android:orientation="vertical">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="horizontal">
+
+                <TextView
+                    android:id="@+id/pageTitle"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_margin="8pt"
+                    android:text="@string/dns_activity_title"
+                    android:textColor="?attr/textDefault"
+                    android:textSize="24sp"
+                    android:textStyle="bold" />
+
+                <Space
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1" />
+
+                <ImageButton
+                    android:id="@+id/addServerButton"
+                    android:layout_width="16pt"
+                    android:layout_height="16pt"
+                    android:layout_marginTop="6pt"
+                    android:layout_marginRight="8pt"
+                    android:background="@android:color/transparent"
+                    app:srcCompat="@drawable/ic_baseline_add_circle_24" />
+            </LinearLayout>
+
+            <ScrollView
+                android:layout_width="match_parent"
+                android:layout_height="match_parent">
+
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="vertical" >
+
+                    <TextView
+                        android:id="@+id/configuredDnsLabel"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:layout_marginStart="16pt"
+                        android:layout_marginLeft="16pt"
+                        android:layout_marginTop="8pt"
+                        android:layout_marginEnd="8pt"
+                        android:layout_marginRight="8pt"
+                        android:layout_marginBottom="2pt"
+                        android:alpha="0.7"
+                        android:paddingRight="8pt"
+                        android:text=""
+                        android:textAllCaps="true"
+                        android:textAppearance="@style/TextAppearance.AppCompat.Small"
+                        android:textSize="12sp" />
+
+                    <TableLayout
+                        android:id="@+id/configuredDnsTableLayout"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:layout_marginStart="8pt"
+                        android:layout_marginLeft="8pt"
+                        android:layout_marginEnd="8pt"
+                        android:layout_marginRight="8pt"
+                        android:background="@drawable/rounded"
+                        android:divider="#46878787"
+                        android:dividerPadding="4pt"
+                        android:paddingLeft="4pt"
+                        android:paddingTop="2pt"
+                        android:paddingRight="4pt"
+                        android:paddingBottom="2pt"
+                        android:showDividers="middle" />
+
+                    <TextView
+                        android:id="@+id/configuredDnsHint"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:layout_marginStart="16pt"
+                        android:layout_marginLeft="16pt"
+                        android:layout_marginTop="4pt"
+                        android:layout_marginEnd="8pt"
+                        android:layout_marginRight="8pt"
+                        android:layout_marginBottom="4pt"
+                        android:alpha="0.7"
+                        android:paddingRight="8pt"
+                        android:text="@string/dns_configured_servers_hint"
+                        android:textAllCaps="false"
+                        android:textAppearance="@style/TextAppearance.AppCompat.Small"
+                        android:textSize="12sp" />
+
+                    <TextView
+                        android:id="@+id/usableDnsLabel"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:layout_marginStart="16pt"
+                        android:layout_marginLeft="16pt"
+                        android:layout_marginTop="8pt"
+                        android:layout_marginEnd="8pt"
+                        android:layout_marginRight="8pt"
+                        android:layout_marginBottom="2pt"
+                        android:alpha="0.7"
+                        android:paddingRight="8pt"
+                        android:text="@string/dns_usable_servers"
+                        android:textAllCaps="true"
+                        android:textAppearance="@style/TextAppearance.AppCompat.Small"
+                        android:textSize="12sp" />
+
+                    <TableLayout
+                        android:id="@+id/usableDnsTableLayout"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:layout_marginStart="8pt"
+                        android:layout_marginLeft="8pt"
+                        android:layout_marginEnd="8pt"
+                        android:layout_marginRight="8pt"
+                        android:background="@drawable/rounded"
+                        android:divider="#46878787"
+                        android:dividerPadding="4pt"
+                        android:paddingLeft="4pt"
+                        android:paddingTop="2pt"
+                        android:paddingRight="4pt"
+                        android:paddingBottom="2pt"
+                        android:showDividers="middle" />
+
+                    <TextView
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:layout_marginStart="16pt"
+                        android:layout_marginLeft="16pt"
+                        android:layout_marginTop="4pt"
+                        android:layout_marginEnd="8pt"
+                        android:layout_marginRight="8pt"
+                        android:layout_marginBottom="4pt"
+                        android:alpha="0.7"
+                        android:paddingRight="8pt"
+                        android:text="@string/dns_usable_servers_hint"
+                        android:textAllCaps="false"
+                        android:textAppearance="@style/TextAppearance.AppCompat.Small"
+                        android:textSize="12sp" />
+
+                    <Space
+                        android:layout_width="match_parent"
+                        android:layout_height="32px" />
+
+                    <TextView
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:layout_marginStart="16pt"
+                        android:layout_marginLeft="16pt"
+                        android:layout_marginEnd="8pt"
+                        android:layout_marginRight="8pt"
+                        android:layout_marginBottom="2pt"
+                        android:alpha="0.7"
+                        android:paddingRight="8pt"
+                        android:text="@string/dns_fixes"
+                        android:textAllCaps="true"
+                        android:textAppearance="@style/TextAppearance.AppCompat.Small"
+                        android:textSize="12sp" />
+
+                    <TableLayout
+                        android:id="@+id/fixesTableLayout"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:layout_marginStart="8pt"
+                        android:layout_marginLeft="8pt"
+                        android:layout_marginEnd="8pt"
+                        android:layout_marginRight="8pt"
+                        android:background="@drawable/rounded"
+                        android:divider="#46878787"
+                        android:dividerPadding="4pt"
+                        android:paddingLeft="4pt"
+                        android:paddingTop="2pt"
+                        android:paddingRight="4pt"
+                        android:paddingBottom="2pt"
+                        android:showDividers="middle">
+
+                        <TableRow
+                            android:layout_width="match_parent"
+                            android:layout_height="match_parent"
+                            android:clickable="true"
+                            android:paddingStart="4pt"
+                            android:paddingTop="2pt"
+                            android:paddingEnd="4pt"
+                            android:paddingBottom="4pt">
+
+                            <TextView
+                                android:layout_width="wrap_content"
+                                android:layout_height="wrap_content"
+                                android:text="@string/dns_fix_chrome_based_browsers"
+                                android:textColor="?attr/textDefault" />
+
+                            <Space
+                                android:layout_width="wrap_content"
+                                android:layout_height="wrap_content"
+                                android:layout_weight="2" />
+
+                            <Switch
+                                android:id="@+id/enableChromeFix"
+                                android:layout_width="wrap_content"
+                                android:layout_height="wrap_content" />
+
+                        </TableRow>
+
+                    </TableLayout>
+
+                    <TextView
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:layout_marginStart="16pt"
+                        android:layout_marginLeft="16pt"
+                        android:layout_marginTop="4pt"
+                        android:layout_marginEnd="8pt"
+                        android:layout_marginRight="8pt"
+                        android:alpha="0.7"
+                        android:paddingRight="8pt"
+                        android:text="@string/dns_fix_chrome_based_browsers_hint"
+                        android:textAllCaps="false"
+                        android:textAppearance="@style/TextAppearance.AppCompat.Small"
+                        android:textSize="12sp" />
+
+                </LinearLayout>
+            </ScrollView>
+
+        </LinearLayout>
+    </FrameLayout>
+</LinearLayout>
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@ -94,7 +94,7 @@
                                android:layout_weight="2" />

                            <Switch
-                                android:id="@+id/enableMulticastBeacon"
+                                android:id="@+id/enableYggdrasil"
                                android:layout_width="wrap_content"
                                android:layout_height="wrap_content" />

@ -347,6 +347,50 @@
                                app:srcCompat="@drawable/ic_baseline_chevron_right_24" />
                        </TableRow>

+                        <TableRow
+                            android:id="@+id/dnsTableRow"
+                            android:layout_width="match_parent"
+                            android:layout_height="match_parent"
+                            android:background="?android:attr/selectableItemBackground"
+                            android:clickable="true"
+                            android:paddingStart="4pt"
+                            android:paddingTop="6pt"
+                            android:paddingEnd="4pt"
+                            android:paddingBottom="6pt">
+
+                            <TextView
+                                android:id="@+id/dnsLabel"
+                                android:layout_width="wrap_content"
+                                android:layout_height="wrap_content"
+                                android:text="DNS servers"
+                                android:textColor="?attr/textDefault" />
+
+                            <Space
+                                android:layout_width="wrap_content"
+                                android:layout_height="wrap_content"
+                                android:layout_weight="2" />
+
+                            <TextView
+                                android:id="@+id/dnsValue"
+                                android:layout_width="wrap_content"
+                                android:layout_height="wrap_content"
+                                android:alpha="0.5"
+                                android:text="No servers"
+                                android:textAlignment="textEnd" />
+
+                            <ImageView
+                                android:id="@+id/dnsChevron"
+                                android:layout_width="wrap_content"
+                                android:layout_height="match_parent"
+                                android:layout_marginLeft="2pt"
+                                android:alpha="0.4"
+                                android:cropToPadding="false"
+                                android:scaleType="fitEnd"
+                                android:scaleX="1.2"
+                                android:scaleY="1.2"
+                                app:srcCompat="@drawable/ic_baseline_chevron_right_24" />
+                        </TableRow>
+
                        <TableRow
                            android:id="@+id/settingsTableRow"
                            android:layout_width="match_parent"
@ -426,12 +470,12 @@
                        android:layout_height="wrap_content"
                        android:layout_marginStart="16pt"
                        android:layout_marginLeft="16pt"
-                        android:layout_marginTop="2pt"
+                        android:layout_marginTop="4pt"
                        android:layout_marginEnd="8pt"
                        android:layout_marginRight="8pt"
                        android:alpha="0.7"
                        android:paddingRight="8pt"
-                        android:text="You must re-enable Yggdrasil after modifying Peers or Settings to make any changes effective."
+                        android:text="You must re-enable Yggdrasil after modifying Peers, DNS servers or Settings to make any changes effective."
                        android:textAllCaps="false"
                        android:textAppearance="@style/TextAppearance.AppCompat.Small"
                        android:textSize="12sp" />
--- a/app/src/main/res/layout/activity_peers.xml
+++ b/app/src/main/res/layout/activity_peers.xml
@ -128,7 +128,7 @@
                        android:layout_height="wrap_content"
                        android:layout_marginStart="16pt"
                        android:layout_marginLeft="16pt"
-                        android:layout_marginTop="2pt"
+                        android:layout_marginTop="4pt"
                        android:layout_marginEnd="8pt"
                        android:layout_marginRight="8pt"
                        android:layout_marginBottom="4pt"
@ -237,7 +237,7 @@
                        android:layout_height="wrap_content"
                        android:layout_marginStart="16pt"
                        android:layout_marginLeft="16pt"
-                        android:layout_marginTop="2pt"
+                        android:layout_marginTop="4pt"
                        android:layout_marginEnd="8pt"
                        android:layout_marginRight="8pt"
                        android:alpha="0.7"
--- a/app/src/main/res/layout/dialog_add_dns_server.xml
+++ b/app/src/main/res/layout/dialog_add_dns_server.xml
@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:paddingLeft="10pt"
+        android:paddingTop="4pt"
+        android:paddingRight="10pt"
+        android:paddingBottom="4pt">
+
+        <TextView
+            android:id="@+id/textView2"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="Enter the IP address of the DNS server to add. Note that all DNS requests, including for non-Yggdrasil internet hostnames, will be sent to these servers." />
+
+        <com.google.android.material.textfield.TextInputLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content">
+
+            <com.google.android.material.textfield.TextInputEditText
+                android:id="@+id/addDnsInput"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="4pt"
+                android:lines="1"
+                android:hint="8.8.8.8 or 302:7991::53" />
+        </com.google.android.material.textfield.TextInputLayout>
+    </LinearLayout>
+</FrameLayout>
--- a/app/src/main/res/layout/dialog_addpeer.xml
+++ b/app/src/main/res/layout/dialog_addpeer.xml
@ -27,6 +27,7 @@
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="4pt"
+                android:lines="1"
                android:hint="tcp://address:port" />
        </com.google.android.material.textfield.TextInputLayout>
    </LinearLayout>
--- a/app/src/main/res/layout/dns_server_usable.xml
+++ b/app/src/main/res/layout/dns_server_usable.xml
@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/tableRow"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content">
+
+    <TextView
+        android:id="@+id/serverValue"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="18dp"
+        android:layout_marginTop="4dp"
+        android:layout_marginEnd="18dp"
+        android:layout_marginBottom="12dp"
+        android:ellipsize="end"
+        android:singleLine="true"
+        android:text=""
+        android:textColor="?attr/textDefault"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toStartOf="@+id/addButton"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="@+id/space" />
+
+    <Space
+        android:id="@+id/space"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        app:layout_constraintBottom_toTopOf="@+id/addButton"
+        app:layout_constraintEnd_toStartOf="@+id/addButton"
+        app:layout_constraintStart_toEndOf="@+id/serverValue"
+        app:layout_constraintTop_toTopOf="@+id/addButton" />
+
+    <ImageButton
+        android:id="@+id/addButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:layout_marginEnd="4dp"
+        android:layout_marginBottom="10dp"
+        android:background="@android:color/transparent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:srcCompat="@drawable/ic_baseline_add_circle_24" />
+</androidx.constraintlayout.widget.ConstraintLayout>
--- a/app/src/main/res/layout/peers_configured.xml
+++ b/app/src/main/res/layout/peers_configured.xml
@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/tableRow"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
@ -16,7 +15,7 @@
        android:layout_marginBottom="12dp"
        android:ellipsize="end"
        android:singleLine="true"
-        android:text="TextView"
+        android:text=""
        android:textColor="?attr/textDefault"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/deletePeerButton"
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@ -1,4 +1,21 @@
 <resources>
    <string name="app_name">Yggdrasil</string>
    <string name="copied_to_clipboard">Copied to clipboard</string>
+    <string name="dns_configured_servers_hint">Use these DNS servers while Yggdrasil is running. Note that all DNS requests, including for non-Yggdrasil internet hostnames, will be sent to these servers.</string>
+    <string name="dns_configured_servers_hint_empty">Yggdrasil will not configure any DNS servers when the service starts. All DNS requests will be resolved by the default resolver.</string>
+    <string name="dns_usable_servers_hint">These DNS servers are provided by community members. Click the + button to add them to the list above. Long-tap to see more info.</string>
+    <string name="dns_no_configured_servers">No servers configured</string>
+    <string name="dns_configured_servers">Configured servers</string>
+    <string name="dns_server_info_revertron">The server supports resolving regular ICANN domains, ALFIS domains, OpenNIC domains.\n\nAlso, it blocks ads, analytics and malware websites.\n\nThe server is run by Revertron.</string>
+    <string name="dns_server_info_dialog_title">Server info</string>
+    <string name="ok">OK</string>
+    <string name="cancel">Cancel</string>
+    <string name="remove">Remove</string>
+    <string name="add">Add</string>
+    <string name="dns_add_server_dialog_title">Add DNS server</string>
+    <string name="dns_activity_title">DNS</string>
+    <string name="dns_usable_servers">Usable servers</string>
+    <string name="dns_fix_chrome_based_browsers">Fix Chrome-based browsers</string>
+    <string name="dns_fix_chrome_based_browsers_hint">If you do not have IPv6 internet connectivity, this option should help Chrome-based browsers to resolve Yggdrasil domain names correctly.</string>
+    <string name="dns_fixes">DNS fixes</string>
 </resources>
--- a/build.gradle
+++ b/build.gradle
@ -1,12 +1,12 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
-    ext.kotlin_version = "1.5.0"
+    ext.kotlin_version = '1.7.20'
    repositories {
        google()
        mavenCentral()
    }
    dependencies {
-        classpath "com.android.tools.build:gradle:4.2.1"
+        classpath "com.android.tools.build:gradle:4.2.2"
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"

        // NOTE: Do not place your application dependencies here; they belong
@ -18,7 +18,6 @@ allprojects {
    repositories {
        google()
        mavenCentral()
-        jcenter() // Warning: this repository is going to shut down soon
    }
 }

--- a/readme.md
+++ b/readme.md
@ -26,7 +26,7 @@ cp /tmp/yggdrasil-go/yggdrasil.aar /tmp/yggdrasil-android/app/libs/

 ```
 cd /tmp/yggdrasil-android
-./gradew assembleRelease
+./gradlew assembleRelease
 ```

 note: you will need to use jdk-11 as jdk-16 `"doesn't work" ™`