Merge branch 'master' of https://github.com/vikulin/yggdrasil-android

.gitignore

@@ -15,3 +15,4 @@
 /yggdrasil/yggdrasil-sources.jar
 /app/src/main/assets/yggdrasil-0.3.8-linux-arm64
 /app/src/main/assets/yggdrasil-0.3.8-linux-armhf
+/.idea/

.idea/codeStyles/Project.xml

@@ -1,6 +1,22 @@
 <component name="ProjectCodeStyleConfiguration">
   <code_scheme name="Project" version="173">
     <JetCodeStyleSettings>
+      <option name="PACKAGES_TO_USE_STAR_IMPORTS">
+        <value>
+          <package name="java.util" alias="false" withSubpackages="false" />
+          <package name="kotlinx.android.synthetic" alias="false" withSubpackages="true" />
+          <package name="io.ktor" alias="false" withSubpackages="true" />
+        </value>
+      </option>
+      <option name="PACKAGES_IMPORT_LAYOUT">
+        <value>
+          <package name="" alias="false" withSubpackages="true" />
+          <package name="java" alias="false" withSubpackages="true" />
+          <package name="javax" alias="false" withSubpackages="true" />
+          <package name="kotlin" alias="false" withSubpackages="true" />
+          <package name="" alias="true" withSubpackages="true" />
+        </value>
+      </option>
       <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
     </JetCodeStyleSettings>
     <codeStyleSettings language="XML">

app/build.gradle

@@ -3,15 +3,15 @@ apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-android-extensions'
 
 android {
-    compileSdkVersion 29
+    compileSdkVersion 30
     defaultConfig {
         applicationId "io.github.chronosx88.yggdrasil"
-        minSdkVersion 21
+        minSdkVersion 15
-        targetSdkVersion 29
+        targetSdkVersion 30
-        versionCode 3
+        versionCode 16
-        versionName "1.3"
+        versionName "1.6"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
-        project.ext.set("archivesBaseName", project.getParent().name+"-"+versionName)
+        setProperty("archivesBaseName", project.getParent().name+"-"+versionName)
     }
 	signingConfigs {
 	  release {
@@ -36,6 +36,16 @@ android {
     kotlinOptions {
         jvmTarget = '1.8'
     }
+    lintOptions {
+        checkReleaseBuilds false
+        // Or, if you prefer, you can continue to check for errors in release builds,
+        // but continue the build even when errors are found:
+        abortOnError false
+    }
+    packagingOptions {
+        exclude 'META-INF/LICENSE'
+        exclude 'META-INF/NOTICE'
+    }
 }
 
 task ndkBuild(type: Exec) {
@@ -48,22 +58,23 @@ gradle.projectsEvaluated {
     tasks.compileDebugKotlin.dependsOn(ndkBuild)
 }
 
-
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation project(path: ':yggdrasil')
 
-    implementation 'androidx.appcompat:appcompat:1.1.0'
+    implementation 'androidx.appcompat:appcompat:1.2.0'
-    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
     implementation "androidx.preference:preference-ktx:1.1.1"
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
 
     implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.7'
-    implementation 'com.google.android.material:material:1.3.0-alpha01'
+    implementation 'com.google.android.material:material:1.3.0-alpha04'
     implementation 'com.google.code.gson:gson:2.8.6'
     implementation 'com.hbb20:ccp:2.4.0'
+    implementation 'com.vincentbrison.openlibraries.android:dualcache:3.1.1'
+    implementation 'com.vincentbrison.openlibraries.android:dualcache-jsonserializer:3.1.1'
 
-    testImplementation 'junit:junit:4.12'
+    testImplementation 'junit:junit:4.13.1'
-    androidTestImplementation 'androidx.test:runner:1.2.0'
+    androidTestImplementation 'androidx.test:runner:1.3.0'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
 }

app/src/main/AndroidManifest.xml

@@ -14,6 +14,12 @@
             android:roundIcon="@mipmap/ic_launcher_round"
             android:supportsRtl="true"
             tools:ignore="GoogleAppIndexingWarning">
+        <activity
+                android:name=".AboutActivity"
+                android:parentActivityName=".MainActivity"
+                android:label="@string/title_activity_about"
+                android:theme="@style/AppTheme.NoActionBar"
+                android:screenOrientation="portrait"/>
         <activity
                 android:name=".PeerListActivity"
                 android:parentActivityName=".MainActivity"
@@ -26,6 +32,12 @@
                 android:label="@string/title_activity_dns_list"
                 android:theme="@style/AppTheme.NoActionBar"
                 android:screenOrientation="portrait"/>
+        <activity
+                android:name=".CopyLocalNodeInfoActivity"
+                android:parentActivityName=".MainActivity"
+                android:label="@string/title_activity_copy_local_node_info"
+                android:theme="@style/AppTheme.NoActionBar"
+                android:screenOrientation="portrait"/>
         <service
                 android:name=".YggdrasilTunService"
                 android:enabled="true"

app/src/main/java/io/github/chronosx88/yggdrasil/AboutActivity.kt

@@ -0,0 +1,205 @@
+package io.github.chronosx88.yggdrasil
+
+import android.os.Bundle
+import android.text.Html
+import android.text.method.LinkMovementMethod
+import android.widget.TextView
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.text.HtmlCompat
+
+class AboutActivity:AppCompatActivity() {
+
+    companion object {
+
+        @JvmStatic var about = "<body style=\"background-color:#343334;\">\n" +
+                "<p class=\"western\" align=\"center\">\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\" color=\"#ffffff\">\n" +
+                "Github repo <a href=\"https://github.com/yggdrasil-network/yggdrasil-android\"><u>https://github.com/yggdrasil-network/yggdrasil-android</u></a>.\n" +
+                "</font>\n" +
+                "<p class=\"western\" ><font style=\"font-size: 14pt\" color=\"#ffffff\"><b>Introduction</b></font></p>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">Yggdrasil is an early-stage implementation of a fully end-to-end encrypted IPv6 network. I\n" +
+                "t is lightweight, self-arranging, supported on multiple platforms and allows pretty much any IPv6-capable application to communicate securely with other Yggdrasil nodes.\n" +
+                "Yggdrasil does not require you to have IPv6 Internet connectivity - it also works over IPv4.</font></p>\n" +
+                "<p class=\"western\"><font style=\"font-size: 14pt\" color=\"#ffffff\"><b>Credit</b></font></p>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\" >Developers: vikulin <a href=\"mailto:vadym.vikulin@gmail.com\">vadym.vikulin@gmail.com</a>, ChronosX88 <a href=\"mailto:chronosx88@gmail.com\">chronosx88@gmail.com</a></font></p>\n" +
+                "\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">QA: jorektheglitch <a href=\"mailto:entressi@yandex.ru\">entressi@yandex.ru</a>\n" +
+                "</font></p>\n" +
+                "\n" +
+                "<font class=\"western\" style=\"font-size: 14pt\" color=\"#ffffff\"><b>Is Yggdrasil safe?</b></font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">All traffic sent across the Yggdrasil network is encrypted end-to-end. Assuming that our crypto is solid, it cannot be decrypted or read by any intermediate nodes, and can only be decrypted by the recipient for which it was intended. However, please note that Yggdrasil has not been officially externally audited.\n" +
+                "</font></p>\n" +
+                "\n" +
+                "<font class=\"western\" style=\"font-size: 14pt\" color=\"#ffffff\"><b>Is Yggdrasil stable?</b></font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">Our official stance is that it is still alpha software. Expect things to not be wholly smooth, and expect to have to upgrade often to the latest builds. That said, there is a small community of users who have not experienced any stability problems so far. Yggdrasil very rarely crashes.\n" +
+                "</font></p>\n" +
+                "\n" +
+                "<font class=\"western\" style=\"font-size: 14pt\" color=\"#ffffff\"><b>Is Yggdrasil anonymous?</b></font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">It is not a goal of the Yggdrasil project to provide anonymity. Your direct peers may be able to determine your location if, for example, you are peering over the Internet.\n" +
+                "</font></p>\n" +
+                "\n" +
+                "<font class=\"western\" style=\"font-size: 14pt\" color=\"#ffffff\"><b>Does Yggdrasil work on my platform?</b></font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">Quite likely! Take a look at the <a href=\"https://yggdrasil-network.github.io/platforms.html\"><u>Platforms</u></a> page - you’ll find platform-specific notes there.\n" +
+                "</font></p>\n" +
+                "\n" +
+                "<font class=\"western\" style=\"font-size: 14pt\" color=\"#ffffff\"><b>Does Yggdrasil require IPv6?</b></font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">Your system must be IPv6-capable, which just about all modern operating systems are.\n" +
+                "While Yggdrasil does transport only IPv6 traffic internally, you do not need an IPv6 internet connection to peer with other Yggdrasil users. You can peer with other Yggdrasil nodes over either IPv4 or IPv6.\n" +
+                "</font>\n" +
+                "<p>\n" +
+                "<font class=\"western\" style=\"font-size: 14pt\" color=\"#ffffff\"><b>Will Yggdrasil conflict with my network routing?</b></font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">Yggdrasil uses the 0200::/7 range, which is a range deprecated by the IETF. It has been deprecated since 2004, pending changes to an RFC which simply never materialised 14 years later. It was decided to use this range instead of fc00::/7 (which is more typically allocated to private networks) in order to prevent conflicts with existing ULA ranges.\n" +
+                "As long as you are not using this deprecated address range on your network, you will not experience any routing conflicts.\n" +
+                "</font>\n" +
+                "<p>\n" +
+                "<font class=\"western\" style=\"font-size: 14pt\" color=\"#ffffff\"><b>Can the network be crawled?</b></font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">Currently it is possible to crawl the network to reveal the spanning tree relationships by querying nodes in the DHT. This is how <a href=\"http://51.15.204.214/\"><u>the network map</u></a> and popularity contest are generated today. However, it is considered a design weakness that this is even possible currently and will hopefully be fixed in the future.\n" +
+                "</font></p>\n" +
+                "\n" +
+                "<font class=\"western\" style=\"font-size: 14pt\" color=\"#ffffff\"><b>Can I run a crawler?</b></font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">Please don’t run your own network crawler. Crawlers generate a lot of network-wide protocol traffic and effect is amplified by each additional crawler. If you really really really want information about the network today, use an <a href=\"http://[301:4541:2f84:1188:216:3eff:feb6:65a3]:3001/nodeinfo.json\"><u>existing data source within the network</u></a> instead of crawling yourself.\n" +
+                "</font></p>\n" +
+                "\n" +
+                "<font class=\"western\" style=\"font-size: 14pt\" color=\"#ffffff\"><b>I’ve just installed Yggdrasil and I can’t ping anyone. What have I missed?</b></font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">Yggdrasil requires that you configure either a static peer to another Yggdrasil node, or that you discover another Yggdrasil node on the same subnet using multicast discovery (which is enabled by default). If you have not added or discovered any peers, you will not be able to reach beyond your own node.\n" +
+                "You can check if you have any peers by running yggdrasilctl getPeers - peer on port 0 is your own node, ports 1 and above are your active peers.\n" +
+                "Stuck for peers? Try adding a <a href=\"https://github.com/yggdrasil-network/public-peers\"><u>public peer</u></a>.\n" +
+                "</font></p>\n" +
+                "\n" +
+                "<font class=\"western\" style=\"font-size: 14pt\" color=\"#ffffff\"><b>I’ve installed the Yggdrasil Debian package and now I can’t find the logs.</b></font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">The Debian package installs the Yggdrasil service into systemd, therefore you can query systemd for the logs:\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">\n" +
+                "    systemctl status yggdrasil\n" +
+                "</font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">\n" +
+                "    journalctl -u yggdrasil\n" +
+                "</font<\n" +
+                "</font></p>\n" +
+                "\n" +
+                "<font class=\"western\" style=\"font-size: 14pt\" color=\"#ffffff\"><b>I’ve modified the configuration file but nothing has changed.</b></font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">Yggdrasil only loads the configuration at startup. Restart the Yggdrasil process or service to load the new configuration.\n" +
+                "</font></p>\n" +
+                "\n" +
+                "<font class=\"western\" style=\"font-size: 14pt\" color=\"#ffffff\"><b>I’m running Yggdrasil on a machine that is directly reachable from the Internet. Does this mean anyone can peer with me?</b></font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">Without any further configuration, yes.\n" +
+                "However, you can either limit incoming connections to your host using a firewall by limiting or denying connections to the port specified in your Listen configuration option. This is useful if you want to limit peerings from certain IP ranges or on certain interfaces.\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">\n" +
+                "Alternatively, you can limit who can peer with you by modifying the AllowedEncryptionPublicKeys option in your Yggdrasil configuration. When this list is empty, any remote node is allowed to peer with you.\n" +
+                "</font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">\n" +
+                "To restrict incoming peerings to certain nodes, you should first ask the operators of those nodes for their EncryptionPublicKey and then add those public keys into your own AllowedEncryptionPublicKeys list. From that point forward, only nodes with those public keys will be allowed to peer with you.\n" +
+                "</font>\n" +
+                "</font></p>\n" +
+                "\n" +
+                "<font class=\"western\" style=\"font-size: 14pt\" color=\"#ffffff\"><b>I am running Yggdrasil from behind a NAT. Will this affect my connectivity?</b></font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">To accept incoming peerings, you will probably need to configure port forwarding on your router/gateway. Yggdrasil listens on the port number specified in the Listen setting, so forward this port to the machine that runs Yggdrasil.\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">\n" +
+                "To use outbound peerings, that is, static peers that have been configured in your Peers setting, you will likely not need to change anything.\n" +
+                "</font>\n" +
+                "</font></p>\n" +
+                "\n" +
+                "<font class=\"western\" style=\"font-size: 14pt\" color=\"#ffffff\"><b>Why does my Yggdrasil adapter have an unusually high MTU?</b></font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">Yggdrasil peerings are typically stream-based and therefore don’t suffer from fragmentation issues when pushing large amounts of data. By using the largest possible MTU supported by a platform, we can send much more data in each write, and the TCP connection will take care of the rest. This also helps somewhat in the reduction of TCP-over-TCP amplification, as there are less control messages to be amplified.\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">\n" +
+                "This also uses less CPU, as we can send more data for every system call on the TUN/TAP adapter or network socket. System calls often result in context switches by the operating system and are expensive operations, therefore by using an MTU of up to 65535, we can save as many as 42 context switches for each packet - a substantial performance improvement!\n" +
+                "</font>\n" +
+                "</font></p>\n" +
+                "\n" +
+                "<font class=\"western\" style=\"font-size: 14pt\" color=\"#ffffff\"><b>I’ve changed my AdminListen port and now yggdrasilctl doesn’t work.</b></font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">yggdrasilctl will assume that your admin port is on localhost:9001. If you have changed it, simply pass your configured endpoint through to yggdrasilctl, i.e.\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">\n" +
+                "yggdrasilctl -endpoint=127.0.0.1:12345\n" +
+                "</font>\n" +
+                "</font></p>\n" +
+                "\n" +
+                "<font class=\"western\" style=\"font-size: 14pt\" color=\"#ffffff\"><b>I want to run an Yggdrasil router to provide connectivity for other people, but I don’t want them to be able to reach my own machine.</b></font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">You can set the IfName configuration setting to \"none\". This will load Yggdrasil, but will not create a TUN/TAP adapter, meaning that your host will not be exposed to the Yggdrasil network. This does of course mean that you won’t be able to send any traffic from that node to Yggdrasil either\n" +
+                "</font></p>\n" +
+                "\n" +
+                "<font class=\"western\" style=\"font-size: 14pt\" color=\"#ffffff\"><b>Does Yggdrasil work alongside an existing VPN?</b></font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">Yes, Yggdrasil should not interfere with existing VPNs. VPN traffic can be sent while using Yggdrasil.\n" +
+                "</font></p>\n" +
+                "\n" +
+                "<font class=\"western\" style=\"font-size: 14pt\" color=\"#ffffff\"><b>Does Yggdrasil work with networks like Tor or I2P?</b></font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">Yggdrasil can peer over Tor or I2P. See <a href=\"https://github.com/yggdrasil-network/public-peers/tree/master/other\"><u>/public-peers/tree/master/other</u></a> for public peers.\n" +
+                "</font></p>\n" +
+                "\n" +
+                "<font class=\"western\" style=\"font-size: 14pt\" color=\"#ffffff\"><b>I want to allow outgoing connections from my machine but prevent unwanted incoming connections.</b></font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">Generally this requires you to use a firewall. The steps for this will vary from platform to platform.\n" +
+                "</font></p>\n" +
+                "<font class=\"western\" style=\"font-size: 13pt\" color=\"#ffffff\"><b>Linux (with ip6tables)</b></font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">Assuming your TUN/TAP adapter is tun0:\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">\n" +
+                "ip6tables -A INPUT -i tun0 -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT\n" +
+                "</font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">\n" +
+                "ip6tables -A INPUT -i tun0 -m conntrack --ctstate INVALID -j DROP\n" +
+                "</font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">\n" +
+                "ip6tables -A INPUT -i tun0 -j DROP\n" +
+                "</font>\n" +
+                "</font></p>\n" +
+                "\n" +
+                "<font class=\"western\" style=\"font-size: 13pt\" color=\"#ffffff\"><b>Windows (with Windows Firewall)</b></font>\n" +
+                "\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">Windows, by default, will classify the TAP adapter as a “Public Network”. Configure Windows Firewall to prevent incoming connections on Public networks.\n" +
+                "</font></p>\n" +
+                "\n" +
+                "<font class=\"western\" style=\"font-size: 13pt\" color=\"#ffffff\"><b>macOS (with built-in firewall)</b></font>\n" +
+                "\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">macOS has an application firewall, therefore any firewall policies applied on other interfaces will also apply to the Yggdrasil interface.\n" +
+                "</font></p>\n" +
+                "\n" +
+                "<font class=\"western\" style=\"font-size: 14pt\" color=\"#ffffff\"><b>Is there any benefit to being the “root node” of the network?</b></font>\n" +
+                "<p>\n" +
+                "<font style=\"font-size: 10pt\" color=\"#ffffff\">No. At worst, the root node may be used in worst-case-scenario paths between other nodes in the absence of being able to determine better routes, but this is not advantageous.\n" +
+                "</font></p>\n" +
+                "</body>"
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_about)
+        setSupportActionBar(findViewById(R.id.toolbar))
+        var textArea = this.findViewById<TextView>(R.id.about)
+        textArea.movementMethod = LinkMovementMethod.getInstance();
+        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N) {
+            textArea.text =  Html.fromHtml(about, HtmlCompat.FROM_HTML_MODE_LEGACY)
+        } else {
+            textArea.text =  Html.fromHtml(about)
+        }
+    }
+}

app/src/main/java/io/github/chronosx88/yggdrasil/CopyLocalNodeInfoActivity.kt

@@ -0,0 +1,28 @@
+package io.github.chronosx88.yggdrasil
+
+import android.os.Bundle
+import android.widget.ListView
+import androidx.appcompat.app.AppCompatActivity
+import androidx.preference.PreferenceManager
+import io.github.chronosx88.yggdrasil.models.NodeInfo
+import io.github.chronosx88.yggdrasil.models.config.CopyInfoAdapter
+import io.github.chronosx88.yggdrasil.models.config.SelectDNSInfoListAdapter
+
+class CopyLocalNodeInfoActivity: AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_copy_local_node_info)
+        setSupportActionBar(findViewById(R.id.toolbar))
+        val preferences =
+            PreferenceManager.getDefaultSharedPreferences(this.baseContext)
+        val ipv6Address = intent.extras!!.getString(MainActivity.IPv6, "")
+        val signingPublicKey = preferences.getString(MainActivity.signingPublicKey, "")
+        val encryptionPublicKey = preferences.getString(MainActivity.encryptionPublicKey, "")
+        var nodeInfoListView = findViewById<ListView>(R.id.nodeInfoList)
+        val nodeInfoList = listOf<NodeInfo>(NodeInfo("IP address", ipv6Address!!), NodeInfo("Encryption Public Key", encryptionPublicKey!!), NodeInfo("Signing Public Key", signingPublicKey!!));
+        var adapter = CopyInfoAdapter(this, nodeInfoList)
+        nodeInfoListView.adapter = adapter
+    }
+
+}

app/src/main/java/io/github/chronosx88/yggdrasil/DNSListActivity.kt

@@ -59,11 +59,11 @@ class DNSListActivity : AppCompatActivity() {
             try {
 
                 for (d in cd) {
-                    var ping = ping(d.address, 53)
+                    var ping = ping(d.address.hostAddress, 53)
                     d.ping = ping
                 }
                 for (dns in allDNS) {
-                    var ping = ping(dns.address, 53)
+                    var ping = ping(dns.address.hostAddress, 53)
                     dns.ping = ping
                     runOnUiThread(
                         Runnable
@@ -107,16 +107,16 @@ class DNSListActivity : AppCompatActivity() {
             var ccpInput = view.findViewById<com.hbb20.CountryCodePicker>(R.id.ccp)
             var ip = ipInput.text.toString().toLowerCase()
             var ccp = ccpInput.selectedCountryNameCode
-            GlobalScope.launch {
+            thread(start = true) {
                 var di = DNSInfo(InetAddress.getByName("["+ip+"]"), ccp, "User DNS")
                 try {
-                    var ping = ping(di.address, 53)
+                    var ping = ping(di.address.hostAddress, 53)
                     di.ping = ping
                 } catch(e: Throwable){
                     di.ping = Int.MAX_VALUE
                 }
-                withContext(Dispatchers.Main) {
+                runOnUiThread {
-                    var selectAdapter = (findViewById<ListView>(R.id.peerList).adapter as SelectDNSInfoListAdapter)
+                    var selectAdapter = (findViewById<ListView>(R.id.dnsList).adapter as SelectDNSInfoListAdapter)
                     selectAdapter.addItem(0, di)
                     selectAdapter.notifyDataSetChanged()
                     ad.dismiss()
@@ -127,7 +127,7 @@ class DNSListActivity : AppCompatActivity() {
 
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
         // Inflate the menu; this adds items to the action bar if it is present.
-        menuInflater.inflate(R.menu.save, menu)
+        menuInflater.inflate(R.menu.save_dns, menu)
         val item = menu.findItem(R.id.saveItem) as MenuItem
         item.setActionView(R.layout.menu_save)
         val saveButton = item

app/src/main/java/io/github/chronosx88/yggdrasil/MainActivity.kt

@@ -4,13 +4,16 @@ import android.app.Activity
 import android.app.ActivityManager
 import android.content.*
 import android.net.VpnService
+import android.os.Build
 import android.os.Bundle
 import android.util.Log
 import android.view.Gravity
 import android.view.View
 import android.widget.*
 import androidx.appcompat.app.AppCompatActivity
+import androidx.appcompat.widget.SwitchCompat
 import androidx.preference.PreferenceManager
+import dalvik.system.DexFile
 import io.github.chronosx88.yggdrasil.models.DNSInfo
 import io.github.chronosx88.yggdrasil.models.PeerInfo
 import io.github.chronosx88.yggdrasil.models.config.DNSInfoListAdapter
@@ -22,11 +25,6 @@ import io.github.chronosx88.yggdrasil.models.config.Utils.Companion.deserializeS
 import io.github.chronosx88.yggdrasil.models.config.Utils.Companion.deserializeStringSet2PeerInfoSet
 import io.github.chronosx88.yggdrasil.models.config.Utils.Companion.serializeDNSInfoSet2StringList
 import io.github.chronosx88.yggdrasil.models.config.Utils.Companion.serializePeerInfoSet2StringList
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.GlobalScope
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
-import java.net.InetAddress
 import kotlin.concurrent.thread
 
 
@@ -60,21 +58,25 @@ class MainActivity : AppCompatActivity() {
         private const val TAG = "Yggdrasil"
         private const val VPN_REQUEST_CODE = 0x0F
 
-        @JvmStatic var isStarted = false
+        @JvmStatic
-        @JvmStatic var isCancelled = false
+        var isStarted = false
-        @JvmStatic var address = ""
+        @JvmStatic
+        var isCancelled = false
+        @JvmStatic
+        var address: String? = ""
+
     }
 
     private var currentPeers = setOf<PeerInfo>()
     private var currentDNS = setOf<DNSInfo>()
-    private var meshPeersReceiver: BroadcastReceiver? = null
+    private var networkStateReceiver: BroadcastReceiver? = null
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
         setSupportActionBar(findViewById(R.id.toolbar))
         isStarted = isYggServiceRunning(this)
-        val switchOn = findViewById<Switch>(R.id.switchOn)
+        val switchOn = findViewById<SwitchCompat>(R.id.switchOn)
         switchOn.isChecked = isStarted
 
         switchOn.setOnCheckedChangeListener { _, isChecked ->
@@ -92,27 +94,34 @@ class MainActivity : AppCompatActivity() {
         //save to shared preferences
         val preferences =
             PreferenceManager.getDefaultSharedPreferences(this.baseContext)
-        val staticIP = findViewById<Switch>(R.id.staticIP)
+        val staticIP = findViewById<SwitchCompat>(R.id.staticIP)
         staticIP.isChecked =
             preferences.getString(STATIC_IP, null) != null
         val peersListView = findViewById<ListView>(R.id.peers)
 
-        currentPeers = deserializeStringSet2PeerInfoSet(preferences.getStringSet(CURRENT_PEERS, HashSet())!!)
+        currentPeers = deserializeStringSet2PeerInfoSet(
+            preferences.getStringSet(
+                CURRENT_PEERS,
+                HashSet()
+            )!!
+        )
         val adapter = PeerInfoListAdapter(this, currentPeers.sortedWith(compareBy { it.ping }))
         peersListView.adapter = adapter
+
+        if (adapter.count > 10) {
+            val item = adapter.getView(0, null, peersListView)
+            item.measure(0, 0)
+            val params = LinearLayout.LayoutParams(
+                LinearLayout.LayoutParams.MATCH_PARENT,
+                (10 * item.measuredHeight).toInt()
+            )
+            peersListView.layoutParams = params
+        }
+
         if(isStarted && this.currentPeers.isEmpty()) {
             updatePeers()
         }
-        val copyAddressButton = findViewById<Button>(R.id.copyIp)
+
-        copyAddressButton.setOnClickListener {
-            val ip = findViewById<TextView>(R.id.ip)
-            val clipboard: ClipboardManager =
-                getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
-            val clip =
-                ClipData.newPlainText("IP address", ip.text.toString())
-            clipboard.setPrimaryClip(clip)
-            showToast(getString(R.string.address_copied))
-        }
         val editPeersButton = findViewById<Button>(R.id.edit)
         editPeersButton.setOnClickListener {
             if(isStarted){
@@ -125,7 +134,12 @@ class MainActivity : AppCompatActivity() {
         }
 
         val listViewDNS = findViewById<ListView>(R.id.dns)
-        currentDNS = deserializeStringSet2DNSInfoSet(preferences.getStringSet(CURRENT_DNS, HashSet())!!)
+        currentDNS = deserializeStringSet2DNSInfoSet(
+            preferences.getStringSet(
+                CURRENT_DNS,
+                HashSet()
+            )!!
+        )
         val adapterDns = DNSInfoListAdapter(this, currentDNS.sortedWith(compareBy { it.ping }))
         listViewDNS.adapter = adapterDns
         val editDnsButton = findViewById<Button>(R.id.editDNS)
@@ -138,16 +152,79 @@ class MainActivity : AppCompatActivity() {
             intent.putStringArrayListExtra(DNS_LIST, serializeDNSInfoSet2StringList(currentDNS))
             startActivityForResult(intent, DNS_LIST_CODE)
         }
+        val nodeInfoButton = findViewById<Button>(R.id.nodeInfo)
+        nodeInfoButton.setOnClickListener {
+            if(isStarted) {
+                val intent = Intent(this@MainActivity, CopyLocalNodeInfoActivity::class.java)
+                intent.putExtra(IPv6, findViewById<TextView>(R.id.ip).text.toString())
+                startActivity(intent)
+            }
+        }
         if(isStarted){
             val ipLayout = findViewById<LinearLayout>(R.id.ipLayout)
             ipLayout.visibility = View.VISIBLE
             findViewById<TextView>(R.id.ip).text = address
         }
-
+        /*
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+            val connectivityManager = this.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
+            connectivityManager?.let {
+                it.registerDefaultNetworkCallback(object : ConnectivityManager.NetworkCallback() {
+                    override fun onAvailable(network: Network) {
+                        if(isStarted) {
+                            stopVpn()
+                            Thread.sleep(1000)
+                            startVpn()
+                        }
+                    }
+                    override fun onLost(network: Network?) {
+                        if(isStarted) {
+                            stopVpn()
+                            Thread.sleep(1000)
+                            startVpn()
+                        }
+                    }
+                })
+            }
+        } else {
+            networkStateReceiver = object : BroadcastReceiver() {
+                override fun onReceive(context: Context, intent: Intent) {
+                    val status: Int = NetworkUtils.getConnectivityStatusString(context)
+                    Log.i(TAG, "Network state has been changed")
+                    if ("android.net.conn.CONNECTIVITY_CHANGE" == intent.action) {
+                        if (status == NetworkUtils.NETWORK_STATUS_NOT_CONNECTED) {
+                            if(isStarted) {
+                                stopVpn()
+                                Thread.sleep(1000)
+                                startVpn()
+                            }
+                        } else {
+                            if(isStarted) {
+                                stopVpn()
+                                Thread.sleep(1000)
+                                startVpn()
+                            }
+                        }
+                    }
+                }
+            }
+        }*/
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
+            val sourceDir: String = this.applicationInfo.sourceDir
+            val dexFile = DexFile(sourceDir)
+            val cl = classLoader
+            val c: Class<*> = dexFile.loadClass("dummy/Dummy", cl)
+        }
+        val versionName = findViewById<Button>(R.id.about)
+        versionName.text = """version:${BuildConfig.VERSION_NAME} build:${BuildConfig.VERSION_CODE}"""
+        versionName.setOnClickListener {
+            val intent = Intent(this@MainActivity, AboutActivity::class.java)
+            startActivity(intent)
+        }
     }
 
     private fun stopVpn(){
-        Log.d(TAG,"Stop")
+        Log.i(TAG, "Stop")
         val intent = Intent(this, YggdrasilTunService::class.java)
         val TASK_CODE = 100
         val pi = createPendingResult(TASK_CODE, intent, 0)
@@ -157,7 +234,7 @@ class MainActivity : AppCompatActivity() {
     }
 
     private fun startVpn(){
-        Log.d(TAG,"Start")
+        Log.i(TAG, "Start")
         val intent= VpnService.prepare(this)
         if (intent!=null){
             startActivityForResult(intent, VPN_REQUEST_CODE)
@@ -167,7 +244,7 @@ class MainActivity : AppCompatActivity() {
     }
 
     private fun updateDNS(){
-        Log.d(TAG,"Update DNS")
+        Log.i(TAG, "Update DNS")
         val intent = Intent(this, YggdrasilTunService::class.java)
         val TASK_CODE = 100
         val pi = createPendingResult(TASK_CODE, intent, 0)
@@ -209,9 +286,13 @@ class MainActivity : AppCompatActivity() {
             val pi = createPendingResult(TASK_CODE, intent, 0)
             intent.putExtra(PARAM_PINTENT, pi)
             intent.putExtra(COMMAND, START)
-            intent.putStringArrayListExtra(CURRENT_PEERS, serializePeerInfoSet2StringList(currentPeers))
+            intent.putStringArrayListExtra(
+                CURRENT_PEERS, serializePeerInfoSet2StringList(
+                    currentPeers
+                )
+            )
             intent.putStringArrayListExtra(CURRENT_DNS, serializeDNSInfoSet2StringList(currentDNS))
-            intent.putExtra(STATIC_IP, findViewById<Switch>(R.id.staticIP).isChecked)
+            intent.putExtra(STATIC_IP, findViewById<SwitchCompat>(R.id.staticIP).isChecked)
 
             startService(intent)
         }
@@ -223,14 +304,17 @@ class MainActivity : AppCompatActivity() {
                 var currentPeers = data.extras!!.getStringArrayList(PEER_LIST)
                 /*WiFi Direct test. need peer empty list*/
                 this.currentPeers = deserializeStringList2PeerInfoSet(currentPeers)
-                val adapter = PeerInfoListAdapter(this, this.currentPeers.sortedWith(compareBy { it.ping }))
+                val adapter = PeerInfoListAdapter(
+                    this,
+                    this.currentPeers.sortedWith(compareBy { it.ping })
+                )
                 val listView = findViewById<ListView>(R.id.peers)
                 listView.adapter = adapter
 
                 //save to shared preferences
                 val preferences =
                     PreferenceManager.getDefaultSharedPreferences(this.baseContext)
-                preferences.edit().putStringSet(CURRENT_PEERS, HashSet(currentPeers)).apply()
+                preferences.edit().putStringSet(CURRENT_PEERS, currentPeers!!.toHashSet()).apply()
                 if(isStarted){
                     //TODO implement UpdateConfig method in native interface and apply peer changes
                     stopVpn()
@@ -248,13 +332,16 @@ class MainActivity : AppCompatActivity() {
             if(data!!.extras!=null){
                 var currentDNS = data.extras!!.getStringArrayList(DNS_LIST)
                 this.currentDNS = deserializeStringList2DNSInfoSet(currentDNS)
-                val adapter = DNSInfoListAdapter(this, this.currentDNS.sortedWith(compareBy { it.ping }))
+                val adapter = DNSInfoListAdapter(
+                    this,
+                    this.currentDNS.sortedWith(compareBy { it.ping })
+                )
                 val listView = findViewById<ListView>(R.id.dns)
                 listView.adapter = adapter
                 //save to shared preferences
                 val preferences =
                     PreferenceManager.getDefaultSharedPreferences(this.baseContext)
-                preferences.edit().putStringSet(CURRENT_DNS, HashSet(currentDNS)).apply()
+                preferences.edit().putStringSet(CURRENT_DNS, currentDNS!!.toHashSet()).apply()
                 if(isStarted){
                     updateDNS()
                 }
@@ -289,7 +376,8 @@ class MainActivity : AppCompatActivity() {
                         val listView = findViewById<ListView>(R.id.peers)
                         val adapter = PeerInfoListAdapter(
                             this@MainActivity,
-                            meshPeers.filter { it.schema!="self" }.sortedWith(compareBy { it.ping })
+                            meshPeers.filter { it.schema != "self" }
+                                .sortedWith(compareBy { it.ping })
                         )
                         runOnUiThread {
                             listView.adapter = adapter
@@ -326,14 +414,14 @@ class MainActivity : AppCompatActivity() {
         super.onRestoreInstanceState(savedInstanceState)
         val preferences =
             PreferenceManager.getDefaultSharedPreferences(this.baseContext)
-        findViewById<Switch>(R.id.staticIP).isChecked =
+        findViewById<SwitchCompat>(R.id.staticIP).isChecked =
             preferences.getString(STATIC_IP, null) != null
     }
 
     override fun onDestroy() {
         super.onDestroy()
-        if (meshPeersReceiver != null){
+        if (networkStateReceiver != null){
-            unregisterReceiver(meshPeersReceiver);
+            unregisterReceiver(networkStateReceiver);
         }
     }
 

app/src/main/java/io/github/chronosx88/yggdrasil/PeerListActivity.kt

@@ -1,21 +1,26 @@
 package io.github.chronosx88.yggdrasil
 
 import android.app.Activity
-import android.content.Context
 import android.content.Intent
 import android.os.Build
 import android.os.Bundle
 import android.view.*
+import android.webkit.URLUtil
 import android.widget.Button
 import android.widget.ListView
 import android.widget.PopupWindow
 import android.widget.TextView
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
+import androidx.preference.PreferenceManager
 import com.google.android.material.floatingactionbutton.FloatingActionButton
 import com.google.gson.Gson
 import com.google.gson.reflect.TypeToken
+import com.hbb20.BuildConfig
 import com.hbb20.CCPCountry
+import com.vincentbrison.openlibraries.android.dualcache.Builder
+import com.vincentbrison.openlibraries.android.dualcache.SizeOf
+import com.vincentbrison.openlibraries.android.dualcache.JsonSerializer
 import io.github.chronosx88.yggdrasil.models.PeerInfo
 import io.github.chronosx88.yggdrasil.models.Status
 import io.github.chronosx88.yggdrasil.models.config.DropDownAdapter
@@ -23,23 +28,28 @@ import io.github.chronosx88.yggdrasil.models.config.SelectPeerInfoListAdapter
 import io.github.chronosx88.yggdrasil.models.config.Utils.Companion.deserializeStringList2PeerInfoSet
 import io.github.chronosx88.yggdrasil.models.config.Utils.Companion.ping
 import io.github.chronosx88.yggdrasil.models.config.Utils.Companion.serializePeerInfoSet2StringList
-import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.*
-import kotlinx.coroutines.GlobalScope
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
 import java.io.ByteArrayOutputStream
 import java.io.FileNotFoundException
 import java.lang.reflect.Type
 import java.net.InetAddress
 import java.net.URI
 import java.net.URL
+import java.net.UnknownHostException
 import java.nio.charset.Charset
 
 
 class PeerListActivity : AppCompatActivity() {
 
     companion object {
+        const val PEER_LIST = "PEER_LIST"
         const val PEER_LIST_URL = "https://publicpeers.neilalexander.dev/publicnodes.json"
+        const val CACHE_NAME = "PEER_LIST_CACHE"
+        const val ONLINE_PEERINFO_LIST = "online_peer_info_list"
+        const val OFFLINE_PEERINFO_LIST = "offline_peer_info_list"
+        const val TEST_APP_VERSION = BuildConfig.VERSION_CODE
+        const val RAM_MAX_SIZE = 100000
+        const val DISK_MAX_SIZE = 100000
     }
 
     fun downloadJson(link: String): String {
@@ -52,8 +62,8 @@ class PeerListActivity : AppCompatActivity() {
         }
     }
 
-    var isLoading = true;
+    private var peerListUrl = PEER_LIST_URL
-
+    private var peerListPing = true
     var popup: PopupWindow? = null
     var adapter: DropDownAdapter? = null
 
@@ -64,39 +74,39 @@ class PeerListActivity : AppCompatActivity() {
         findViewById<FloatingActionButton>(R.id.fab).setOnClickListener { _ ->
             addNewPeer()
         }
+        val preferences =
+            PreferenceManager.getDefaultSharedPreferences(this.baseContext)
+        var peerListUrl: String =
+            preferences.getString(PEER_LIST, "")!!
+        if(!peerListUrl.isNullOrBlank()){
+            this@PeerListActivity.peerListUrl = peerListUrl
+        }
         var extras = intent.extras
         var peerList = findViewById<ListView>(R.id.peerList)
         var adapter = SelectPeerInfoListAdapter(this, arrayListOf(), mutableSetOf())
         peerList.adapter = adapter
+        var peerInfoListCache = Builder<List<PeerInfo>>(CACHE_NAME, TEST_APP_VERSION)
+            .enableLog()
+            .useReferenceInRam(RAM_MAX_SIZE, SizeOfPeerList())
+            .useSerializerInDisk(
+                DISK_MAX_SIZE, true,
+                JsonSerializer(ArrayList<PeerInfo>().javaClass), baseContext
+            ).build();
 
-        GlobalScope.launch {
+        GlobalScope.launch() {
             try {
                 var cp = deserializeStringList2PeerInfoSet(
                     extras!!.getStringArrayList(MainActivity.PEER_LIST)!!
                 )
                 for (pi in cp) {
-                    var ping = ping(pi.address, pi.port)
+                    var ping = ping(pi.hostName, pi.port)
                     pi.ping = ping
                 }
                 try {
-                    var json = downloadJson(PEER_LIST_URL)
+                    var peerInfoCache = peerInfoListCache.get(ONLINE_PEERINFO_LIST)
-                    var countries = CCPCountry.getLibraryMasterCountriesEnglish()
+                    if (peerInfoCache != null && peerInfoCache.isNotEmpty()) {
-                    val mapType: Type = object :
+                        for (peerInfo in peerInfoCache) {
-                        TypeToken<Map<String?, Map<String, Status>>>() {}.type
+                            var ping = ping(peerInfo.hostName, peerInfo.port)
-                    val peersMap: Map<String, Map<String, Status>> = Gson().fromJson(json, mapType)
-                    for ((country, peers) in peersMap.entries) {
-                        for ((peer, status) in peers) {
-                            if (status.up) {
-                                for (ccp in countries) {
-                                    if (ccp.name.toLowerCase()
-                                            .contains(country.replace(".md", "").replace("-", " "))
-                                    ) {
-                                        var url = URI(peer)
-                                        try {
-                                            var address = InetAddress.getByName(url.host)
-                                            var peerInfo =
-                                                PeerInfo(url.scheme, address, url.port, ccp.nameCode)
-                                            var ping = ping(address, url.port)
                             peerInfo.ping = ping
                             if (cp.contains(peerInfo)) {
                                 continue
@@ -107,6 +117,54 @@ class PeerListActivity : AppCompatActivity() {
                                     adapter.sort()
                                 }
                             }
+                        }
+                    }
+                    var json = downloadJson(this@PeerListActivity.peerListUrl)
+                    var countries = CCPCountry.getLibraryMasterCountriesEnglish()
+                    val mapType: Type = object :
+                        TypeToken<Map<String?, Map<String, Status>>>() {}.type
+                    val peersMap: Map<String, Map<String, Status>> = Gson().fromJson(json, mapType)
+                    var cachePeerInfoList = mutableListOf<PeerInfo>()
+                    for ((country, peers) in peersMap.entries) {
+                        for ((peer, status) in peers) {
+                            if (status.up) {
+                                for (ccp in countries) {
+                                    if (ccp.name.toLowerCase()
+                                            .contains(country.replace(".md", "").replace("-", " "))
+                                    ) {
+                                        if(!peerListPing){
+                                            return@launch
+                                        }
+                                        var url = URI(peer)
+                                        try {
+                                            var address = InetAddress.getByName(url.host)
+                                            var peerInfo =
+                                                PeerInfo(
+                                                    url.scheme,
+                                                    address,
+                                                    url.port,
+                                                    ccp.nameCode
+                                                )
+                                            var ping = ping(url.host, url.port)
+                                            peerInfo.ping = ping
+                                            if (cp.contains(peerInfo)) {
+                                                continue
+                                            }
+                                            if (peerInfo.ping < Int.MAX_VALUE) {
+                                                cachePeerInfoList.add(peerInfo)
+                                            }
+                                            withContext(Dispatchers.Main) {
+                                                adapter.addItem(peerInfo)
+                                                if (adapter.count % 5 == 0) {
+                                                    adapter.sort()
+                                                    if (cachePeerInfoList.size > 0) {
+                                                        peerInfoListCache.put(
+                                                            ONLINE_PEERINFO_LIST,
+                                                            cachePeerInfoList.toList()
+                                                        )
+                                                    }
+                                                }
+                                            }
                                         } catch (e: Throwable) {
                                             e.printStackTrace()
                                         }
@@ -115,14 +173,33 @@ class PeerListActivity : AppCompatActivity() {
                             }
                         }
                     }
-                } catch(e: FileNotFoundException){
+                } catch (e: Exception) {
+                    when (e) {
+                        is FileNotFoundException, is UnknownHostException -> {
+                            var onlinePeerInfoList = peerInfoListCache.get(ONLINE_PEERINFO_LIST)
+                            if (onlinePeerInfoList != null) {
+                                for (peerInfo in onlinePeerInfoList) {
+                                    var ping = ping(peerInfo.hostName, peerInfo.port)
+                                    peerInfo.ping = ping
+                                    if (cp.contains(peerInfo)) {
+                                        continue
+                                    }
+                                    withContext(Dispatchers.Main) {
+                                        adapter.addItem(peerInfo)
+                                        if (adapter.count % 5 == 0) {
+                                            adapter.sort()
+                                        }
+                                    }
+                                }
+                            }
                             e.printStackTrace()
                         }
+                        else -> e.printStackTrace()
+                    }
+                }
                 var currentPeers = ArrayList(cp.sortedWith(compareBy { it.ping }))
                 withContext(Dispatchers.Main) {
                     adapter.addAll(0, currentPeers)
-                    isLoading = false
-                    adapter.setLoading(isLoading)
                 }
             } catch (e: Throwable) {
                 e.printStackTrace()
@@ -130,6 +207,29 @@ class PeerListActivity : AppCompatActivity() {
         }
     }
 
+    private fun editPeerListUrl() {
+        val view: View = LayoutInflater.from(this).inflate(R.layout.edit_peer_list_url_dialog, null)
+        val ab: AlertDialog.Builder = AlertDialog.Builder(this)
+        ab.setCancelable(true).setView(view)
+        var ad = ab.show()
+        var saveButton = view.findViewById<Button>(R.id.save)
+        var urlInput = view.findViewById<TextView>(R.id.urlInput)
+        urlInput.text = peerListUrl
+        saveButton.setOnClickListener{
+
+            var url = urlInput.text.toString()
+            if(!URLUtil.isValidUrl(url)){
+                urlInput.error = "The URL is invalid!"
+                return@setOnClickListener;
+            }
+            peerListUrl = url
+            val preferences =
+                PreferenceManager.getDefaultSharedPreferences(this.baseContext)
+            preferences.edit().putString(PEER_LIST, peerListUrl).apply()
+            ad.dismiss()
+        }
+    }
+
     private fun addNewPeer() {
         val view: View = LayoutInflater.from(this).inflate(R.layout.new_peer_dialog, null)
         val countryCode: String = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
@@ -140,7 +240,9 @@ class PeerListActivity : AppCompatActivity() {
         var schemaInput = view.findViewById<TextView>(R.id.schemaInput)
         var ipInput = view.findViewById<TextView>(R.id.ipInput)
         ipInput.requestFocus()
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
             schemaInput.showSoftInputOnFocus = false
+        }
         schemaInput.setOnFocusChangeListener { v, _ ->
             if(schemaInput.isFocused) {
                 onClickSchemaList(v)
@@ -149,7 +251,11 @@ class PeerListActivity : AppCompatActivity() {
         schemaInput.setOnClickListener { v->
             onClickSchemaList(v)
         }
-        getPopupWindow(R.layout.spinner_item, resources.getStringArray(R.array.schemas), schemaInput);
+        getPopupWindow(
+            R.layout.spinner_item,
+            resources.getStringArray(R.array.schemas),
+            schemaInput
+        );
         view.findViewById<com.hbb20.CountryCodePicker>(R.id.ccp).setCountryForNameCode(countryCode)
         val ab: AlertDialog.Builder = AlertDialog.Builder(this)
         ab.setCancelable(true).setView(view)
@@ -159,13 +265,25 @@ class PeerListActivity : AppCompatActivity() {
             var portInput = view.findViewById<TextView>(R.id.portInput)
             var ccpInput = view.findViewById<com.hbb20.CountryCodePicker>(R.id.ccp)
             var schema = schemaInput.text.toString().toLowerCase()
+            if(schema.isEmpty()){
+                schemaInput.error = "Schema is required"
+            }
             var ip = ipInput.text.toString().toLowerCase()
+            if(ip.isEmpty()){
+                ipInput.error = "IP address is required"
+            }
             var port = portInput.text.toString().toInt()
+            if(port<=0){
+                portInput.error = "Port should be > 0"
+            }
+            if(port>=Short.MAX_VALUE){
+                portInput.error = "Port should be < "+Short.MAX_VALUE
+            }
             var ccp = ccpInput.selectedCountryNameCode
             GlobalScope.launch {
                 var pi = PeerInfo(schema, InetAddress.getByName(ip), port, ccp)
                 try {
-                    var ping = ping(pi.address, pi.port)
+                    var ping = ping(pi.hostName, pi.port)
                     pi.ping = ping
                 } catch (e: Throwable){
                     pi.ping = Int.MAX_VALUE
@@ -216,34 +334,60 @@ class PeerListActivity : AppCompatActivity() {
 
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
         // Inflate the menu; this adds items to the action bar if it is present.
-        menuInflater.inflate(R.menu.save, menu)
+        menuInflater.inflate(R.menu.save_peers, menu)
         val item = menu.findItem(R.id.saveItem) as MenuItem
         item.setActionView(R.layout.menu_save)
         val saveButton = item
             .actionView.findViewById<Button>(R.id.saveButton)
         saveButton.setOnClickListener {
-            if(isLoading){
+            saveButton.isClickable = false
-                return@setOnClickListener
+            cancelPeerListPing()
-            }
             val result = Intent(this, MainActivity::class.java)
             var adapter = findViewById<ListView>(R.id.peerList).adapter as SelectPeerInfoListAdapter
             val selectedPeers = adapter.getSelectedPeers()
-            /* WiFi Direct test - no peers is needed
-            if(selectedPeers.size>0) {
-                result.putExtra(MainActivity.PEER_LIST, serializePeerInfoSet2StringList(selectedPeers))
-                setResult(Activity.RESULT_OK, result)
-                finish()
-            } else {
-                val text = "Select at least one peer"
-                val duration = Toast.LENGTH_SHORT
-                val toast = Toast.makeText(applicationContext, text, duration)
-                toast.setGravity(Gravity.CENTER, 0, 0)
-                toast.show()
-            }*/
             result.putExtra(MainActivity.PEER_LIST, serializePeerInfoSet2StringList(selectedPeers))
             setResult(Activity.RESULT_OK, result)
             finish()
         }
+
+        val editUrl = menu.findItem(R.id.editUrlItem) as MenuItem
+        editUrl.setActionView(R.layout.menu_edit_url)
+        val editUrlButton = editUrl
+            .actionView.findViewById<Button>(R.id.editUrlButton)
+        editUrlButton.setOnClickListener {
+            editPeerListUrl()
+        }
         return true
     }
+
+    private fun cancelPeerListPing() {
+        peerListPing = false
+    }
+
+    override fun onStop() {
+        super.onStop()
+        cancelPeerListPing()
+    }
+}
+
+class SizeOfPeerList: SizeOf<List<PeerInfo>> {
+
+    override fun sizeOf(obj: List<PeerInfo>): Int{
+        var size = 0
+        for (o in obj) {
+            if (o.hostName != null) {
+                size += o.hostName.length * 2
+            }
+            if (o.schema != null) {
+                size += o.schema.length * 2
+            }
+            if (o.countryCode != null) {
+                size += o.countryCode!!.length * 2
+            }
+            size += 4
+            size += 4
+            size += 1
+        }
+        return size
+    }
 }

app/src/main/java/io/github/chronosx88/yggdrasil/YggdrasilTunService.kt

@@ -27,39 +27,32 @@ import mobile.Mobile
 import mobile.Yggdrasil
 import java.io.*
 import java.net.Inet6Address
+import kotlin.concurrent.thread
 
 class YggdrasilTunService : VpnService() {
 
     private lateinit var ygg: Yggdrasil
+    private lateinit var tunInputStream: InputStream
+    private lateinit var tunOutputStream: OutputStream
+    private lateinit var address: String
     private var isClosed = false
 
     /** Maximum packet size is constrained by the MTU, which is given as a signed short/2 */
     private val MAX_PACKET_SIZE = Short.MAX_VALUE/2
+    private var tunInterface: ParcelFileDescriptor? = null
 
     companion object {
         private const val TAG = "Yggdrasil-service"
     }
-    private var tunInterface: ParcelFileDescriptor? = null
-    private var tunInputStream: InputStream? = null
-    private var tunOutputStream: OutputStream? = null
-    private var scope: CoroutineScope? = null
-    private var address: String? = null
-
-    private var mNotificationManager: NotificationManager? = null
 
     private val FOREGROUND_ID = 1338
 
-    override fun onCreate() {
-        super.onCreate()
-        mNotificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
-    }
-
     override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
         val pi: PendingIntent? = intent?.getParcelableExtra(MainActivity.PARAM_PINTENT)
         when(intent?.getStringExtra(MainActivity.COMMAND)){
             MainActivity.STOP ->{
                 stopVpn(pi)
-                startForeground(FOREGROUND_ID, foregroundNotification("Yggdrasil service stopped"))
+                foregroundNotification(FOREGROUND_ID, "Yggdrasil service stopped")
             }
             MainActivity.START ->{
                 val peers = deserializeStringList2PeerInfoSet(intent.getStringArrayListExtra(MainActivity.CURRENT_PEERS))
@@ -67,7 +60,7 @@ class YggdrasilTunService : VpnService() {
                 val staticIP: Boolean = intent.getBooleanExtra(MainActivity.STATIC_IP, false)
                 ygg = Yggdrasil()
                 setupTunInterface(pi, peers, dns, staticIP)
-                startForeground(FOREGROUND_ID, foregroundNotification("Yggdrasil service started"))
+                foregroundNotification(FOREGROUND_ID, "Yggdrasil service started")
             }
             MainActivity.UPDATE_DNS ->{
                 val dns = deserializeStringList2DNSInfoSet(intent.getStringArrayListExtra(MainActivity.CURRENT_DNS))
@@ -84,11 +77,18 @@ class YggdrasilTunService : VpnService() {
     private fun setupIOStreams(dns: MutableSet<DNSInfo>){
         address = ygg.addressString
 
-        var builder = Builder()
+        var builder = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
-            .addAddress(address!!, 7)
+            Builder()
+                .addAddress(address, 7)
                 .allowFamily(OsConstants.AF_INET)
                 .allowBypass()
+                .setBlocking(true)
                 .setMtu(MAX_PACKET_SIZE)
+        } else {
+            Builder()
+                .addAddress(address, 7)
+                .setMtu(MAX_PACKET_SIZE)
+        }
         if (dns.size > 0) {
             for (d in dns) {
                 builder.addDnsServer(d.address)
@@ -100,15 +100,9 @@ class YggdrasilTunService : VpnService() {
         if(!hasIpv6DefaultRoute()){
             builder.addRoute("2000::",3)
         }
-        if(tunInterface!=null){
-            tunInterface!!.close()
-            tunInputStream!!.close()
-            tunOutputStream!!.close()
-        }
         tunInterface = builder.establish()
         tunInputStream = FileInputStream(tunInterface!!.fileDescriptor)
         tunOutputStream = FileOutputStream(tunInterface!!.fileDescriptor)
-
     }
 
     private fun setupTunInterface(
@@ -129,15 +123,13 @@ class YggdrasilTunService : VpnService() {
 
         setupIOStreams(dns)
 
-        val job = SupervisorJob()
+        thread(start = true) {
-        scope = CoroutineScope(Dispatchers.Default + job)
+            val buffer = ByteArray(MAX_PACKET_SIZE)
-        scope!!.launch {
-            val buffer = ByteArray(2048)
             while (!isClosed) {
                 readPacketsFromTun(yggConduitEndpoint, buffer)
             }
         }
-        scope!!.launch {
+        thread(start = true) {
             while (!isClosed) {
                 writePacketsToTun(yggConduitEndpoint)
             }
@@ -148,7 +140,7 @@ class YggdrasilTunService : VpnService() {
 
     private fun sendMeshPeerStatus(pi: PendingIntent?){
         class Token : TypeToken<List<Peer>>()
-        var add = ygg.addressString
+        ygg.addressString
         var meshPeers: List<Peer> = gson.fromJson(ygg.peersJSON, Token().type)
         val intent: Intent = Intent().putStringArrayListExtra(
             MainActivity.MESH_PEERS,
@@ -219,12 +211,8 @@ class YggdrasilTunService : VpnService() {
     private fun readPacketsFromTun(yggConduitEndpoint: ConduitEndpoint, buffer: ByteArray) {
         try {
             // Read the outgoing packet from the input stream.
-            val length = tunInputStream?.read(buffer) ?: 1
+            val length = tunInputStream.read(buffer)
-            if (length > 0){
             yggConduitEndpoint.send(buffer.sliceArray(IntRange(0, length - 1)))
-            } else {
-                Thread.sleep(100)
-            }
         } catch (e: IOException) {
             e.printStackTrace()
         }
@@ -234,7 +222,7 @@ class YggdrasilTunService : VpnService() {
         val buffer = yggConduitEndpoint.recv()
         if(buffer!=null) {
             try {
-                tunOutputStream?.write(buffer)
+                tunOutputStream.write(buffer)
             } catch (e: IOException) {
                 e.printStackTrace()
             }
@@ -243,11 +231,9 @@ class YggdrasilTunService : VpnService() {
 
     private fun stopVpn(pi: PendingIntent?) {
         isClosed = true;
-        scope!!.coroutineContext.cancelChildren()
+        tunInputStream.close()
-        tunInputStream!!.close()
+        tunOutputStream.close()
-        tunOutputStream!!.close()
         tunInterface!!.close()
-        tunInterface = null
         Log.d(TAG,"Stop is running from service")
         ygg.stop()
         val intent: Intent = Intent()
@@ -265,7 +251,9 @@ class YggdrasilTunService : VpnService() {
     private fun hasIpv6DefaultRoute(): Boolean {
         val cm =
             getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
             val networks = cm.allNetworks
+
             for (network in networks) {
                 val linkProperties = cm.getLinkProperties(network)
                 if(linkProperties!=null) {
@@ -277,10 +265,12 @@ class YggdrasilTunService : VpnService() {
                     }
                 }
             }
+        }
         return false
     }
 
-    private fun foregroundNotification(text: String): Notification? {
+    private fun foregroundNotification(FOREGROUND_ID: Int, text: String) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
             val channelId =
                 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                     createNotificationChannel(TAG, "Yggdrasil service")
@@ -300,7 +290,8 @@ class YggdrasilTunService : VpnService() {
                 .setContentText(text)
                 .setSmallIcon(R.mipmap.ic_launcher)
                 .setTicker(text)
-        return b.build()
+            startForeground(FOREGROUND_ID, b.build())
+        }
     }
 
     @RequiresApi(Build.VERSION_CODES.O)

app/src/main/java/io/github/chronosx88/yggdrasil/models/NodeInfo.kt

@@ -0,0 +1,13 @@
+package io.github.chronosx88.yggdrasil.models
+
+class NodeInfo {
+
+    constructor(key: String, value: String){
+        this.key = key
+        this.value = value
+    }
+
+    var key: String
+    var value: String
+
+}

app/src/main/java/io/github/chronosx88/yggdrasil/models/PeerInfo.kt

@@ -7,9 +7,13 @@ import java.net.InetAddress
 
 
 class PeerInfo {
+
+    constructor(){
+
+    }
+
     constructor(schema: String, address: InetAddress, port: Int, countryCode: String){
         this.schema = schema
-        this.address = address
         var a = address.toString();
         if(a.lastIndexOf('/')>0){
             this.hostName = a.split("/")[0]
@@ -22,7 +26,6 @@ class PeerInfo {
 
     constructor(schema: String, address: InetAddress, port: Int, countryCode: String?, isMeshPeer: Boolean){
         this.schema = schema
-        this.address = address
         var a = address.toString();
         if(a.lastIndexOf('/')>0){
             this.hostName = a.split("/")[0]
@@ -34,9 +37,8 @@ class PeerInfo {
         this.isMeshPeer = isMeshPeer
     }
 
-    var schema: String
+    lateinit var schema: String
-    var address: InetAddress
+    lateinit var hostName: String
-    var hostName: String
     var port = 0
     var countryCode: String?=null
     var ping: Int = Int.MAX_VALUE

app/src/main/java/io/github/chronosx88/yggdrasil/models/config/CopyInfoAdapter.kt

@@ -0,0 +1,67 @@
+package io.github.chronosx88.yggdrasil.models.config
+
+import android.content.ClipData
+import android.content.ClipboardManager
+import android.content.Context
+import android.view.Gravity
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.*
+import io.github.chronosx88.yggdrasil.R
+import io.github.chronosx88.yggdrasil.models.NodeInfo
+
+class CopyInfoAdapter(
+    context: Context,
+    nodeInfoList: List<NodeInfo>,
+) : ArrayAdapter<NodeInfo?> (context, 0, nodeInfoList) {
+
+    private val mContext: Context = context
+    private var nodeInfoList: MutableList<NodeInfo> = nodeInfoList as MutableList<NodeInfo>
+
+    override fun getItem(position: Int): NodeInfo? {
+        return nodeInfoList[position]
+    }
+
+    override fun getCount(): Int {
+        return nodeInfoList.size
+    }
+
+    override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
+        var copyNodeInfoHolder = CopyInfoHolder()
+        var listItem: View? = convertView
+        if (listItem == null) {
+            listItem = LayoutInflater.from(mContext).inflate(R.layout.copy_node_info_list_item, parent, false)
+            copyNodeInfoHolder.copyButton = listItem.findViewById(R.id.nodeInfoButton) as Button
+            copyNodeInfoHolder.nodeInfoText = listItem.findViewById(R.id.nodeInfoText) as TextView
+            copyNodeInfoHolder.nodeInfoKey = listItem.findViewById(R.id.nodeInfoKey) as TextView
+            listItem.tag = copyNodeInfoHolder
+        } else {
+            copyNodeInfoHolder = listItem.tag as CopyInfoHolder
+        }
+        copyNodeInfoHolder.nodeInfoKey.text = nodeInfoList[position].key
+        copyNodeInfoHolder.nodeInfoText.text = nodeInfoList[position].value
+        copyNodeInfoHolder.copyButton.setOnClickListener{ _ ->
+            val clipboard: ClipboardManager =
+                context.getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
+            val clip =
+                ClipData.newPlainText(nodeInfoList[position].key, nodeInfoList[position].value)
+            clipboard.setPrimaryClip(clip)
+            showToast(nodeInfoList[position].key + " " + context.getString(R.string.node_info_copied))
+        }
+        return listItem!!
+    }
+
+    private fun showToast(text: String){
+        val duration = Toast.LENGTH_SHORT
+        val toast = Toast.makeText(context, text, duration)
+        toast.setGravity(Gravity.CENTER, 0, 0)
+        toast.show()
+    }
+
+    class CopyInfoHolder {
+        lateinit var nodeInfoKey: TextView
+        lateinit var nodeInfoText: TextView
+        lateinit var copyButton: Button
+    }
+}

app/src/main/java/io/github/chronosx88/yggdrasil/models/config/NetworkUtils.kt

@@ -0,0 +1,44 @@
+package io.github.chronosx88.yggdrasil.models.config
+
+import android.content.Context
+import android.net.ConnectivityManager
+
+
+class NetworkUtils {
+
+    companion object {
+
+        val TYPE_WIFI = 1
+        val TYPE_MOBILE = 2
+        val TYPE_NOT_CONNECTED = 0
+        val NETWORK_STATUS_NOT_CONNECTED = 0
+        val NETWORK_STATUS_WIFI = 1
+        val NETWORK_STATUS_MOBILE = 2
+
+        @JvmStatic
+        fun getConnectivityStatus(context: Context): Int {
+            val cm =
+                context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
+            val activeNetwork = cm.activeNetworkInfo
+            if (null != activeNetwork) {
+                if (activeNetwork.type == ConnectivityManager.TYPE_WIFI) return TYPE_WIFI
+                if (activeNetwork.type == ConnectivityManager.TYPE_MOBILE) return TYPE_MOBILE
+            }
+            return TYPE_NOT_CONNECTED
+        }
+
+        @JvmStatic
+        fun getConnectivityStatusString(context: Context): Int {
+            val conn: Int = getConnectivityStatus(context)
+            var status = 0
+            if (conn == TYPE_WIFI) {
+                status = NETWORK_STATUS_WIFI
+            } else if (conn == TYPE_MOBILE) {
+                status = NETWORK_STATUS_MOBILE
+            } else if (conn == TYPE_NOT_CONNECTED) {
+                status = NETWORK_STATUS_NOT_CONNECTED
+            }
+            return status
+        }
+    }
+}

app/src/main/java/io/github/chronosx88/yggdrasil/models/config/SelectDNSInfoAdapter.kt

@@ -1,14 +1,14 @@
 package io.github.chronosx88.yggdrasil.models.config
 
+import android.content.ClipData
+import android.content.ClipboardManager
 import android.content.Context
 import android.graphics.Color
+import android.view.Gravity
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import android.widget.ArrayAdapter
+import android.widget.*
-import android.widget.CheckBox
-import android.widget.ImageView
-import android.widget.TextView
 import io.github.chronosx88.yggdrasil.R
 import io.github.chronosx88.yggdrasil.models.DNSInfo
 
@@ -66,6 +66,14 @@ class SelectDNSInfoListAdapter(
                 }
             }
         }
+        dnsInfoHolder.dnsInfoText.setOnClickListener {
+            val clipboard: ClipboardManager =
+                context.getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
+            val clip =
+                ClipData.newPlainText("DNS info", dnsId)
+            clipboard.setPrimaryClip(clip)
+            showToast(dnsId + " " + context.getString(R.string.node_info_copied))
+        }
         dnsInfoHolder.checkbox.isChecked = this.currentDNS.contains(currentDNS)
         return listItem!!
     }
@@ -100,4 +108,11 @@ class SelectDNSInfoListAdapter(
         lateinit var dnsInfoText: TextView
         lateinit var ping: TextView
     }
+
+    private fun showToast(text: String){
+        val duration = Toast.LENGTH_SHORT
+        val toast = Toast.makeText(context, text, duration)
+        toast.setGravity(Gravity.CENTER, 0, 0)
+        toast.show()
+    }
 }

app/src/main/java/io/github/chronosx88/yggdrasil/models/config/SelectPeerInfoListAdapter.kt

@@ -1,14 +1,14 @@
 package io.github.chronosx88.yggdrasil.models.config
 
+import android.content.ClipData
+import android.content.ClipboardManager
 import android.content.Context
 import android.graphics.Color
+import android.view.Gravity
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
-import android.widget.ArrayAdapter
+import android.widget.*
-import android.widget.CheckBox
-import android.widget.ImageView
-import android.widget.TextView
 import io.github.chronosx88.yggdrasil.R
 import io.github.chronosx88.yggdrasil.models.PeerInfo
 
@@ -18,7 +18,6 @@ class SelectPeerInfoListAdapter(
     currentPeers: MutableSet<PeerInfo>
 ) : ArrayAdapter<PeerInfo?> (context, 0, allPeers) {
 
-    private var isLoading = true
     private val mContext: Context = context
     private var allPeers: MutableList<PeerInfo> = allPeers as MutableList<PeerInfo>
     private var currentPeers: MutableSet<PeerInfo> = currentPeers
@@ -47,17 +46,15 @@ class SelectPeerInfoListAdapter(
         val currentPeer = allPeers[position]
         peerInfoHolder.countryFlag.setImageResource(currentPeer.getCountry(mContext)!!.flagID)
         val peerId = currentPeer.toString()
-        if(currentPeer.ping == Int.MAX_VALUE){
         peerInfoHolder.peerInfoText.text = peerId
+        if(currentPeer.ping == Int.MAX_VALUE){
             peerInfoHolder.ping.text=""
             peerInfoHolder.peerInfoText.setTextColor(Color.GRAY)
         } else {
-            peerInfoHolder.peerInfoText.text = peerId
             peerInfoHolder.ping.text = currentPeer.ping.toString() + " ms"
             peerInfoHolder.peerInfoText.setTextColor(Color.WHITE)
         }
         peerInfoHolder.checkbox.setOnCheckedChangeListener { _, isChecked ->
-            if(!isLoading) {
             if (isChecked) {
                 if (!currentPeers.contains(currentPeer)) {
                     currentPeers.add(currentPeer)
@@ -68,6 +65,13 @@ class SelectPeerInfoListAdapter(
                 }
             }
         }
+        peerInfoHolder.peerInfoText.setOnClickListener {
+            val clipboard: ClipboardManager =
+                context.getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
+            val clip =
+                ClipData.newPlainText("Peer info", peerId)
+            clipboard.setPrimaryClip(clip)
+            showToast(peerId + " " + context.getString(R.string.node_info_copied))
         }
         peerInfoHolder.checkbox.isChecked = this.currentPeers.contains(currentPeer)
         return listItem!!
@@ -77,9 +81,15 @@ class SelectPeerInfoListAdapter(
         return currentPeers
     }
 
+    fun getAllPeers(): List<PeerInfo> {
+        return allPeers
+    }
+
     fun addItem(peerInfo: PeerInfo){
+        if(!allPeers.contains(peerInfo)){
             allPeers.add(peerInfo)
         }
+    }
 
     fun addItem(index: Int, peerInfo: PeerInfo){
         allPeers.add(index, peerInfo)
@@ -97,10 +107,6 @@ class SelectPeerInfoListAdapter(
         this.notifyDataSetChanged()
     }
 
-    fun setLoading(loading: Boolean){
-        this.isLoading = loading
-    }
-
     class PeerInfoHolder {
         lateinit var checkbox: CheckBox
         lateinit var countryFlag: ImageView
@@ -108,4 +114,10 @@ class SelectPeerInfoListAdapter(
         lateinit var ping: TextView
     }
 
+    private fun showToast(text: String){
+        val duration = Toast.LENGTH_SHORT
+        val toast = Toast.makeText(context, text, duration)
+        toast.setGravity(Gravity.CENTER, 0, 0)
+        toast.show()
+    }
 }

app/src/main/java/io/github/chronosx88/yggdrasil/models/config/Utils.kt

@@ -77,15 +77,15 @@ class Utils {
         }
 
         @JvmStatic
-        fun ping(address: InetAddress, port:Int): Int {
+        fun ping(hostname: String, port:Int): Int {
             val start = System.currentTimeMillis()
             val socket = Socket()
             try {
-                socket.connect(InetSocketAddress(address, port), 5000)
+                socket.connect(InetSocketAddress(hostname, port), 5000)
                 socket.close()
             } catch (e: Exception) {
                 e.printStackTrace()
-                print(address)
+                print(hostname)
                 return Int.MAX_VALUE
             }
             return (System.currentTimeMillis() - start).toInt()

app/src/main/res/layout/activity_about.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.coordinatorlayout.widget.CoordinatorLayout 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=".AboutActivity"
+        android:background="@color/grey">
+
+    <com.google.android.material.appbar.AppBarLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:theme="@style/AppTheme.AppBarOverlay">
+
+        <androidx.appcompat.widget.Toolbar
+                android:id="@+id/toolbar"
+                android:layout_width="match_parent"
+                android:layout_height="?attr/actionBarSize"
+                android:background="?attr/colorPrimary"
+                app:popupTheme="@style/AppTheme.PopupOverlay" />
+
+    </com.google.android.material.appbar.AppBarLayout>
+
+    <include layout="@layout/content_about" />
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/layout/activity_copy_local_node_info.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.coordinatorlayout.widget.CoordinatorLayout 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=".CopyLocalNodeInfoActivity"
+        android:background="@color/grey">
+
+    <com.google.android.material.appbar.AppBarLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:theme="@style/AppTheme.AppBarOverlay">
+
+        <androidx.appcompat.widget.Toolbar
+                android:id="@+id/toolbar"
+                android:layout_width="match_parent"
+                android:layout_height="?attr/actionBarSize"
+                android:background="?attr/colorPrimary"
+                app:popupTheme="@style/AppTheme.PopupOverlay" />
+
+    </com.google.android.material.appbar.AppBarLayout>
+
+    <include layout="@layout/content_node_info" />
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/layout/activity_main.xml

@@ -27,9 +27,10 @@
                     app:layout_constraintBottom_toBottomOf="parent"
                     app:layout_constraintStart_toStartOf="parent"
                     app:layout_constraintTop_toTopOf="parent"
-                    app:popupTheme="@style/AppTheme.PopupOverlay" />
+                    app:popupTheme="@style/AppTheme.PopupOverlay"
+                    android:layout_marginRight="240dp" />
 
-            <Switch
+            <androidx.appcompat.widget.SwitchCompat
                     android:id="@+id/staticIP"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
@@ -41,7 +42,7 @@
                     android:text="Static IP"
                     android:textColor="@color/white"/>
 
-            <Switch
+            <androidx.appcompat.widget.SwitchCompat
                     android:id="@+id/switchOn"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"

app/src/main/res/layout/content_about.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        xmlns:app="http://schemas.android.com/apk/res-auto"
+        android:background="@color/grey"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior">
+    <ScrollView
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
+        <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="match_parent">
+            <TextView
+                    android:id="@+id/about"
+                    android:layout_width="match_parent"
+                    android:layout_height="match_parent"
+                    android:layout_margin="20dp">
+            </TextView>
+        </LinearLayout>
+    </ScrollView>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/layout/content_main.xml

@@ -35,10 +35,10 @@
                     android:textColor="@color/dark_30"
                     />
             <Button
-                    android:id="@+id/copyIp"
+                    android:id="@+id/nodeInfo"
                     android:layout_width="wrap_content"
                     android:layout_height="match_parent"
-                    android:text="COPY"
+                    android:text="INFO"
                     app:layout_constraintEnd_toEndOf="parent"
                     android:background="@android:color/transparent"/>
         </androidx.constraintlayout.widget.ConstraintLayout>
@@ -53,7 +53,7 @@
                 app:layout_constraintBottom_toBottomOf="parent"
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintTop_toTopOf="parent"
-                app:layout_constraintEnd_toStartOf="@+id/copyIp"
+                app:layout_constraintEnd_toStartOf="@+id/nodeInfo"
                 android:text=""
                 android:textColor="@color/white"/>
     </LinearLayout>
@@ -152,5 +152,12 @@
                 app:layout_constraintTop_toTopOf="parent"/>
 
     </LinearLayout>
-
+    <Button
+            android:id="@+id/about"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:background="@android:color/transparent"
+            app:layout_constraintBottom_toBottomOf="parent"
+            android:text=""
+            android:textSize="10sp" />
 </androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/content_node_info.xml

@@ -0,0 +1,13 @@
+<?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:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior">
+    <ListView
+            android:id="@+id/nodeInfoList"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:divider="@color/dark_20"
+            android:dividerHeight="2px"/>
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/copy_node_info_list_item.xml

@@ -0,0 +1,52 @@
+<RelativeLayout
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:app="http://schemas.android.com/apk/res-auto"
+        android:layout_height="wrap_content"
+        android:layout_width="match_parent">
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+            android:layout_height="wrap_content"
+            android:layout_width="match_parent"
+            android:layout_toLeftOf="@+id/nodeInfoButton"
+            android:id="@+id/data">
+
+        <TextView
+                android:id="@+id/nodeInfoKey"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:gravity="center_vertical"
+                android:textSize="10sp"
+                android:text = "nodeInfoKey"
+                android:textColor="@color/white"
+                android:layout_marginStart="10dp"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintBottom_toTopOf="@+id/nodeInfoText"
+                android:layout_marginLeft="10dp"
+                android:paddingBottom="5dp"/>
+
+        <TextView
+                android:id="@+id/nodeInfoText"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="10dp"
+                android:layout_marginLeft="10dp"
+                android:gravity="center_vertical"
+                android:minHeight="35dp"
+                android:text="nodeInfoText"
+                android:textColor="@color/white"
+                android:textSize="14sp"
+                app:layout_constraintBottom_toBottomOf="@+id/nodeInfoKey"
+                app:layout_constraintStart_toStartOf="parent" />
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
+
+    <Button
+        android:id="@+id/nodeInfoButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="COPY"
+        android:textColor="@color/white"
+        android:layout_alignParentRight="true"
+        android:background="@android:color/transparent"/>
+
+</RelativeLayout>

app/src/main/res/layout/edit_peer_list_url_dialog.xml

@@ -0,0 +1,43 @@
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:app="http://schemas.android.com/apk/res-auto"
+        android:layout_height="wrap_content"
+        android:layout_width="match_parent"
+        android:padding="10dp"
+        android:background="@color/grey">
+
+    <com.google.android.material.textfield.TextInputLayout
+            android:id="@+id/url"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            android:layout_margin="10dp"
+            app:boxBackgroundMode="none"
+            android:background="@drawable/edit_text_rounded_corner"
+            android:textColorHint="@color/white"
+            style="@style/EditText.OutlinedBox">
+
+        <com.google.android.material.textfield.TextInputEditText
+                android:id="@+id/urlInput"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:hint="URL"
+                android:textColor="@color/white"
+                android:textCursorDrawable="@null"/>
+    </com.google.android.material.textfield.TextInputLayout>
+
+    <Button
+            android:id="@+id/save"
+            android:layout_width="match_parent"
+            android:layout_height="60dp"
+            android:layout_marginTop="20dp"
+            android:layout_marginBottom="10dp"
+            android:layout_marginLeft="10dp"
+            android:layout_marginRight="10dp"
+            app:layout_constraintTop_toBottomOf="@+id/url"
+            android:background="@drawable/button_selector"
+            app:backgroundTint="@null"
+            android:text="SAVE"
+            android:textColor="@color/white"/>
+
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/host_list_item.xml

@@ -22,5 +22,6 @@
             android:paddingEnd="20dp"
             android:minHeight="22dp"
             android:textSize="13sp"
-            android:textColor="@color/white"/>
+            android:textColor="@color/white"
+            android:paddingRight="20dp" />
 </LinearLayout>

app/src/main/res/layout/host_list_item_edit.xml

@@ -11,7 +11,8 @@
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintStart_toEndOf="@+id/hostInfoText"
             app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintTop_toTopOf="parent"/>
+            app:layout_constraintTop_toTopOf="parent"
+            android:layout_marginLeft="10dp" />
     <TextView
             android:id="@+id/hostInfoText"
             android:layout_width="0dp"
@@ -24,7 +25,8 @@
             app:layout_constraintEnd_toStartOf="@+id/ping"
             app:layout_constraintStart_toEndOf="@+id/countryFlag"
             app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintTop_toTopOf="parent"/>
+            app:layout_constraintTop_toTopOf="parent"
+            android:layout_marginLeft="10dp" />
 
     <TextView
             android:id="@+id/ping"

app/src/main/res/layout/menu_edit_url.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center_vertical">
+    <Button xmlns:android="http://schemas.android.com/apk/res/android"
+            android:id="@+id/editUrlButton"
+            android:layout_height="wrap_content"
+            android:layout_width="wrap_content"
+            android:text="EDIT URL"
+            android:background="@android:color/transparent"/>
+</RelativeLayout>

app/src/main/res/menu/save_peers.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item   android:id="@+id/editUrlItem"
+            android:title=""
+            app:actionLayout="@layout/menu_edit_url"
+            app:showAsAction="always"/>
+    <item   android:id="@+id/saveItem"
+            android:title=""
+            app:actionLayout="@layout/menu_save"
+            app:showAsAction="always"/>
+</menu>

app/src/main/res/values-v21/styles.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <style name="SwitchTheme" parent="Theme.AppCompat.Light">
+        <item name="colorControlActivated">@color/green</item>
+    </style>
+</resources>

app/src/main/res/values/strings.xml

@@ -5,6 +5,8 @@
     <string name="switch_button_title">SwitchOn</string>
     <string name="title_activity_peer_list">Edit peers</string>
     <string name="title_activity_dns_list">Edit DNS</string>
-    <string name="address_copied">Address copied</string>
+    <string name="node_info_copied">copied</string>
     <string name="schema">Schema</string>
+    <string name="title_activity_about">Yggdrasil</string>
+    <string name="title_activity_copy_local_node_info">Node info</string>
 </resources>

app/src/main/res/values/styles.xml

@@ -10,7 +10,7 @@
     </style>
 
     <style name="SwitchTheme" parent="Theme.AppCompat.Light">
-        <item name="android:colorControlActivated">@color/green</item>
+
     </style>
 
     <style name="EditText.OutlinedBox" parent="Widget.MaterialComponents.TextInputLayout.OutlinedBox">

build.gradle

@@ -1,13 +1,14 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.3.72'
+    ext.kotlin_version = '1.4.10'
     repositories {
         google()
+        mavenCentral()
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.0.1'
+        classpath 'com.android.tools.build:gradle:4.1.1'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

fastlane/metadata/android/en-US/changelogs/1.txt

@@ -0,0 +1,4 @@
+v1.0
+ 1. Implemented VPN network interface for Yggdrasil tunneling
+ 2. Optimized memory buffer
+ 3. Added IPv6 info

fastlane/metadata/android/en-US/changelogs/2.txt

@@ -0,0 +1,13 @@
+v1.2
+ * New DNS and new Peer form
+ * fix adding Peers when json url unavailable
+ * DNS dynamic list selection fixes
+ * ping selected Peers and DNS fixes
+ * fixed when app crashed sometimes after ygg switch off
+ * fixed high CPU consumption after switch-off.
+ * prevent NPE fix
+
+v1.1
+ 1. Added dynamic peer list loading and edit functionality
+ 2. Layout minor changes
+ 3. Peers ping test and sorting by response time

fastlane/metadata/android/en-US/changelogs/3.txt

@@ -0,0 +1,3 @@
+v1.3
+ 1. open MainActivity after Notification click, task (#12)
+ 2. new DNS only number issue

fastlane/metadata/android/en-US/changelogs/4.txt

@@ -0,0 +1,3 @@
+v1.4
+ * F-Droid support
+ * Android 4.0.3 support (API 15)

fastlane/metadata/android/en-US/full_description.txt

@@ -0,0 +1,4 @@
+The application for connecting to Yggdrasil network on Android
+
+Once connected, you can access yggdrasil public services,
+as the application has peered automatically to default peers within the application

fastlane/metadata/android/en-US/short_description.txt

@@ -0,0 +1 @@
+The application for connecting to Yggdrasil network on Android

fastlane/metadata/android/en-US/title.txt

@@ -0,0 +1 @@
+Yggdrasil

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Tue Jun 09 01:07:00 PDT 2020
+#Wed Oct 14 16:00:08 EEST 2020
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-all.zip

yggdrasil/Makefile

@@ -4,7 +4,7 @@ all:
 	-go get -u github.com/yggdrasil-network/yggdrasil-go;
 	-cd $(GOPATH)/src/github.com/yggdrasil-network/yggdrasil-go; \
 		go get -v -d ./...; \
-		go get -u github.com/vikulin/yggdrasil-extras@268b006; \
+		go get -u github.com/yggdrasil-network/yggdrasil-extras@005d79c; \
 		ANDROID=true ./build;
 	mv -f $(GOPATH)/src/github.com/yggdrasil-network/yggdrasil-go/yggdrasil.aar yggdrasil.aar;
 	mv -f $(GOPATH)/src/github.com/yggdrasil-network/yggdrasil-go/yggdrasil-sources.jar yggdrasil-sources.jar;