A

src/main/java/eu/m724/autopeerer/client/ClientConfiguration.java

@@ -0,0 +1,9 @@
+package eu.m724.autopeerer.client;
+
+import eu.m724.autopeerer.common.Configuration;
+
+public class ClientConfiguration extends Configuration {
+    public ClientConfiguration() {
+        super("client");
+    }
+}

src/main/java/eu/m724/autopeerer/client/Main.java

@@ -1,27 +1,28 @@
 package eu.m724.autopeerer.client;
 
+import eu.m724.autopeerer.client.wireguard.WireGuardLive;
+
+import java.io.File;
+import java.io.IOException;
 import java.net.URI;
 
 public class Main {
     public static void main(String[] args) throws InterruptedException {
         System.out.println("Hello world!");
 
-        URI serverUri = URI.create("ws://127.0.0.1:8002");
+        var config = new ClientConfiguration();
+        try {
+            config.load();
+        } catch (IOException e) {
+            throw new RuntimeException("Failed to load configuration", e);
+        }
 
-        var packetHandler = new PacketHandler();
+        URI serverUri = URI.create(config.getString("remote"));
+
+        var wireGuardLive = new WireGuardLive(new File(config.getString("wireguard.directory")));
+        var packetHandler = new PacketHandler(wireGuardLive);
         var client = new MyWebsocketClient(serverUri, packetHandler);
 
-        var delay = 1000;
+        client.connect();
-
-        while (true) {
-            var success = client.connectBlocking();
-            System.out.println("Reconnecting");
-            if (success) {
-                delay = 1000;
-            } else {
-                delay *= 2;
-                Thread.sleep(delay);
-            }
-        }
     }
 }

src/main/java/eu/m724/autopeerer/client/MyWebsocketClient.java

@@ -1,7 +1,7 @@
 package eu.m724.autopeerer.client;
 
 import eu.m724.autopeerer.common.packet.Packets;
-import eu.m724.autopeerer.common.packet.client.LoginPacket;
+import eu.m724.autopeerer.common.packet.c2s.LoginPacket;
 import org.java_websocket.client.WebSocketClient;
 import org.java_websocket.handshake.ServerHandshake;
 

src/main/java/eu/m724/autopeerer/client/PacketHandler.java

@@ -1,27 +1,32 @@
 package eu.m724.autopeerer.client;
 
+import eu.m724.autopeerer.client.wireguard.WireGuardKeys;
 import eu.m724.autopeerer.client.wireguard.WireGuardLive;
 import eu.m724.autopeerer.client.wireguard.WireGuardSession;
 import eu.m724.autopeerer.common.packet.Packet;
 import eu.m724.autopeerer.common.packet.Packets;
-import eu.m724.autopeerer.common.packet.client.PingRequestPacket;
+import eu.m724.autopeerer.common.packet.c2s.PingRequestPacket;
-import eu.m724.autopeerer.common.packet.client.SessionRequestPacket;
+import eu.m724.autopeerer.common.packet.c2s.SessionRequestPacket;
-import eu.m724.autopeerer.common.packet.server.PingResponsePacket;
+import eu.m724.autopeerer.common.packet.s2c.PingResponsePacket;
-import eu.m724.autopeerer.common.packet.server.SessionResponsePacket;
+import eu.m724.autopeerer.common.packet.s2c.SessionResponsePacket;
 
 import java.io.BufferedReader;
-import java.io.File;
 import java.io.IOException;
 import java.nio.BufferUnderflowException;
 import java.nio.ByteBuffer;
+import java.nio.file.FileAlreadyExistsException;
 import java.util.Base64;
 import java.util.concurrent.CompletableFuture;
 import java.util.function.Consumer;
 
 public class PacketHandler {
     Consumer<ByteBuffer> sender;
-    // TODO not here
+
-    private final WireGuardLive wireGuardLive = new WireGuardLive(new File("configs"));
+    private final WireGuardLive wireGuardLive;
+
+    public PacketHandler(WireGuardLive wireGuardLive) {
+        this.wireGuardLive = wireGuardLive;
+    }
 
     void handle(ByteBuffer bytes) {
         Packet<?> p;
@@ -84,9 +89,19 @@ public class PacketHandler {
     }
 
     private void handleVpnRequest(SessionRequestPacket packet) {
-        var session = new WireGuardSession(12345, "serverpoecjteta", "fefe:fefe::fefe", packet.linkLocal.toCompressedString(), packet.endpointHost + ":" + packet.endpointPort, packet.publicKey);
+        var privateKey = WireGuardKeys.generatePrivateKey();
+        var publicKey = WireGuardKeys.derivePublicKey(privateKey);
+
+        // TODO fill port and link local
+        var session = new WireGuardSession(12345, privateKey, "fefe:fefe::fefe", packet.linkLocal.toCompressedString(), packet.endpointHost + ":" + packet.endpointPort, packet.publicKey);
+
         try {
             wireGuardLive.saveSession(packet.sessionId, session);
+            System.out.printf("Created session #%d to %s\n", packet.sessionId, packet.endpointHost);
+            Packets.send(new SessionResponsePacket(packet.sessionId, SessionResponsePacket.SessionResult.OK, session.listenPort(), publicKey), sender);
+        } catch (FileAlreadyExistsException e) {
+            System.err.println("Tried to create a session which already exists: #" + packet.sessionId);
+            Packets.send(new SessionResponsePacket(packet.sessionId, SessionResponsePacket.SessionResult.ERROR, -1, null), sender);
         } catch (IOException e) {
             Packets.send(new SessionResponsePacket(packet.sessionId, SessionResponsePacket.SessionResult.ERROR, -1, null), sender);
             throw new RuntimeException(e);

src/main/java/eu/m724/autopeerer/client/wireguard/WireGuardLive.java

@@ -2,27 +2,30 @@ package eu.m724.autopeerer.client.wireguard;
 
 import java.io.*;
 import java.nio.file.Files;
+import java.nio.file.StandardOpenOption;
 
 public class WireGuardLive {
     private final File configsPath;
 
     public WireGuardLive(File configsPath) {
+        System.out.println(configsPath.getAbsolutePath());
         this.configsPath = configsPath;
     }
 
-    public void saveSession(int connectionId, WireGuardSession session) throws IOException {
+    public void saveSession(int sessionId, WireGuardSession session) throws IOException {
-        File file = new File(configsPath, "ap_" + connectionId + ".conf");
+        File file = new File(configsPath, "ap_" + sessionId + ".conf");
-        file.createNewFile();
+        Files.writeString(file.toPath(), session.config(), StandardOpenOption.CREATE_NEW, StandardOpenOption.WRITE);
-
-        try (FileWriter writer = new FileWriter(file)) {
-            writer.write(session.config());
-        }
     }
 
-    public WireGuardSession getSession(int connectionId) throws IOException {
+    public WireGuardSession getSession(int sessionId) throws IOException {
-        File file = new File(configsPath, "ap_" + connectionId + ".conf");
+        File file = new File(configsPath, "ap_" + sessionId + ".conf");
 
         String s = Files.readString(file.toPath());
         return WireGuardSession.fromString(s);
     }
+
+    public boolean existsSession(int sessionId) {
+        File file = new File(configsPath, "ap_" + sessionId + ".conf");
+        return file.exists();
+    }
 }

src/main/java/eu/m724/autopeerer/common/packet/Packets.java

@@ -1,11 +1,11 @@
 package eu.m724.autopeerer.common.packet;
 
-import eu.m724.autopeerer.common.packet.client.LoginPacket;
+import eu.m724.autopeerer.common.packet.c2s.LoginPacket;
-import eu.m724.autopeerer.common.packet.client.PingRequestPacket;
+import eu.m724.autopeerer.common.packet.c2s.PingRequestPacket;
-import eu.m724.autopeerer.common.packet.client.SessionRequestPacket;
+import eu.m724.autopeerer.common.packet.c2s.SessionRequestPacket;
-import eu.m724.autopeerer.common.packet.server.LoginResponsePacket;
+import eu.m724.autopeerer.common.packet.s2c.LoginResponsePacket;
-import eu.m724.autopeerer.common.packet.server.PingResponsePacket;
+import eu.m724.autopeerer.common.packet.s2c.PingResponsePacket;
-import eu.m724.autopeerer.common.packet.server.SessionResponsePacket;
+import eu.m724.autopeerer.common.packet.s2c.SessionResponsePacket;
 
 import java.nio.ByteBuffer;
 import java.util.function.Consumer;

src/main/java/eu/m724/autopeerer/common/packet/c2s/LoginPacket.java

@@ -1,4 +1,4 @@
-package eu.m724.autopeerer.common.packet.client;
+package eu.m724.autopeerer.common.packet.c2s;
 
 import eu.m724.autopeerer.common.packet.Packet;
 

src/main/java/eu/m724/autopeerer/common/packet/c2s/PingRequestPacket.java

@@ -1,4 +1,4 @@
-package eu.m724.autopeerer.common.packet.client;
+package eu.m724.autopeerer.common.packet.c2s;
 
 import eu.m724.autopeerer.common.packet.Packet;
 

src/main/java/eu/m724/autopeerer/common/packet/c2s/SessionRequestPacket.java

@@ -1,4 +1,4 @@
-package eu.m724.autopeerer.common.packet.client;
+package eu.m724.autopeerer.common.packet.c2s;
 
 import eu.m724.autopeerer.common.packet.Packet;
 import inet.ipaddr.HostName;
@@ -17,8 +17,9 @@ public class SessionRequestPacket implements Packet<SessionRequestPacket> {
     public final String publicKey;
     public final String endpointHost;
     public final int endpointPort;
+    public final long asn;
 
-    public SessionRequestPacket(short sessionId, IPv6Address linkLocal, String publicKey, String endpointHost, int endpointPort) {
+    public SessionRequestPacket(short sessionId, IPv6Address linkLocal, String publicKey, String endpointHost, int endpointPort, long asn) {
         this.sessionId = sessionId;
 
         this.linkLocal = linkLocal;
@@ -36,6 +37,9 @@ public class SessionRequestPacket implements Packet<SessionRequestPacket> {
 
         this.endpointPort = endpointPort;
         assert endpointPort > 0 && endpointPort < 65536;
+
+        this.asn = asn;
+        assert asn < 0xFFFFFFFFL;
     }
 
     @Override
@@ -54,26 +58,29 @@ public class SessionRequestPacket implements Packet<SessionRequestPacket> {
         buffer.get(pk);
         var publicKey = Base64.getEncoder().encodeToString(pk);
 
-        var endpointPort = buffer.getShort();
+        var endpointPort = buffer.getShort() & 0xFFFF;
 
         var epl = buffer.get() & 0xFF;
         var ep = new byte[epl];
         buffer.get(ep);
         var endpointHost = new String(ep, StandardCharsets.US_ASCII);
 
-        return new SessionRequestPacket(id, linkLocal, publicKey, endpointHost, endpointPort);
+        var asn = Integer.toUnsignedLong(buffer.getInt());
+
+        return new SessionRequestPacket(id, linkLocal, publicKey, endpointHost, endpointPort, asn);
     }
 
     @Override
     public ByteBuffer serialize() {
-        var buffer = ByteBuffer.allocate(53 + endpointHost.length());
+        var buffer = ByteBuffer.allocate(57 + endpointHost.length());
 
         buffer.putShort(sessionId); // 2b
         buffer.put(linkLocal.getBytes()); // 16b
         buffer.put(Base64.getDecoder().decode(publicKey)); // 32b
-        buffer.putShort((short)endpointPort); // 2b
+        buffer.putShort((short) endpointPort); // 2b
         buffer.put((byte) endpointHost.length()); // 1b
         buffer.put(endpointHost.getBytes(StandardCharsets.US_ASCII));
+        buffer.putInt((int) asn);
 
         return buffer;
     }

src/main/java/eu/m724/autopeerer/common/packet/s2c/LoginResponsePacket.java

@@ -1,4 +1,4 @@
-package eu.m724.autopeerer.common.packet.server;
+package eu.m724.autopeerer.common.packet.s2c;
 
 import eu.m724.autopeerer.common.packet.Packet;
 

src/main/java/eu/m724/autopeerer/common/packet/s2c/PingResponsePacket.java

@@ -1,4 +1,4 @@
-package eu.m724.autopeerer.common.packet.server;
+package eu.m724.autopeerer.common.packet.s2c;
 
 import eu.m724.autopeerer.common.packet.Packet;
 

src/main/java/eu/m724/autopeerer/common/packet/s2c/SessionResponsePacket.java

@@ -1,4 +1,4 @@
-package eu.m724.autopeerer.common.packet.server;
+package eu.m724.autopeerer.common.packet.s2c;
 
 import eu.m724.autopeerer.common.packet.Packet;
 

src/main/java/eu/m724/autopeerer/server/Main.java

@@ -5,28 +5,28 @@ import java.net.InetSocketAddress;
 import java.util.Set;
 
 public class Main {
-    public static void main(String[] args) {
+    public static void main(String[] args) throws InterruptedException {
         System.out.println("Hello world!");
 
         var config = new ServerConfiguration();
         Set<Node> nodes;
         try {
-            config.init();
+            config.load();
             nodes = config.loadNodes();
             if (nodes.isEmpty())
                 System.err.println("Loaded 0 nodes. No client will be able to connect.");
             else
                 System.out.printf("Loaded %d nodes.\n", nodes.size());
         } catch (IOException e) {
-            throw new RuntimeException("Failed to init configuration", e);
+            throw new RuntimeException("Failed to load configuration", e);
         }
 
         var packetHandler = new PacketHandler(nodes);
-        var client = new MyWebsocketServer(
+        var server = new MyWebsocketServer(
                 new InetSocketAddress(config.getString("listen.address"), config.getInt("listen.port")),
                 packetHandler
         );
 
-        client.start();
+        server.start();
     }
 }

src/main/java/eu/m724/autopeerer/server/MyWebsocketServer.java

@@ -1,7 +1,7 @@
 package eu.m724.autopeerer.server;
 
-import eu.m724.autopeerer.common.packet.client.PingRequestPacket;
+import eu.m724.autopeerer.common.packet.c2s.PingRequestPacket;
-import eu.m724.autopeerer.common.packet.client.SessionRequestPacket;
+import eu.m724.autopeerer.common.packet.c2s.SessionRequestPacket;
 import inet.ipaddr.IPAddressString;
 import org.java_websocket.WebSocket;
 import org.java_websocket.handshake.ClientHandshake;
@@ -43,9 +43,10 @@ public class MyWebsocketServer extends WebSocketServer {
             state.send(new SessionRequestPacket(
                     (short) 1,
                     new IPAddressString("fe80::dead:fed").getAddress().toIPv6(),
-                    "somepk",
+                    "IBusHriGmiJaqbp0IGfClDDHXcei8+JL1MIHjueheUw=",
                     "end.point",
-                    51820
+                    51820,
+                    4242420000L
             ));
         } catch (UnknownHostException e) {
             throw new RuntimeException(e);

src/main/java/eu/m724/autopeerer/server/PacketHandler.java

@@ -2,9 +2,9 @@ package eu.m724.autopeerer.server;
 
 import eu.m724.autopeerer.common.packet.Packet;
 import eu.m724.autopeerer.common.packet.Packets;
-import eu.m724.autopeerer.common.packet.client.LoginPacket;
+import eu.m724.autopeerer.common.packet.c2s.LoginPacket;
-import eu.m724.autopeerer.common.packet.server.PingResponsePacket;
+import eu.m724.autopeerer.common.packet.s2c.PingResponsePacket;
-import eu.m724.autopeerer.common.packet.server.SessionResponsePacket;
+import eu.m724.autopeerer.common.packet.s2c.SessionResponsePacket;
 
 import java.nio.BufferUnderflowException;
 import java.nio.ByteBuffer;

src/main/java/eu/m724/autopeerer/server/ServerConfiguration.java

@@ -1,33 +1,18 @@
 package eu.m724.autopeerer.server;
 
+import eu.m724.autopeerer.common.Configuration;
+
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
-import java.nio.file.Files;
 import java.util.HashSet;
 import java.util.Properties;
 import java.util.Set;
 
-public class ServerConfiguration {
+public class ServerConfiguration extends Configuration {
-    private final File directory = new File("config");
+    public ServerConfiguration() {
-    private final File configFile = new File(directory, "server.properties");
+        super("server");
-
-    private final Properties properties = new Properties();
-
-    public void init() throws IOException {
-        directory.mkdir();
-
-        if (!configFile.exists()) {
-            try (var is = getClass().getClassLoader().getResourceAsStream("server.properties")) {
-                Files.write(configFile.toPath(), is.readAllBytes());
-                properties.load(is);
-            }
-        }
-
-        try (var is = new FileInputStream(configFile)) {
-            properties.load(is);
-        }
     }
 
     public Set<Node> loadNodes() throws IOException {
@@ -50,20 +35,4 @@ public class ServerConfiguration {
 
         return nodes;
     }
-
-    public String getString(String property) {
-        return properties.getProperty(property);
-    }
-
-    public String getString(String property, String def) {
-        return properties.getProperty(property, def);
-    }
-
-    public int getInt(String property) {
-        return Integer.parseInt(getString(property));
-    }
-
-    public int getInt(String property, int def) {
-        return Integer.parseInt(getString(property, String.valueOf(def)));
-    }
 }

src/main/resources/client.properties

@@ -0,0 +1,2 @@
+remote=ws://127.0.0.1:8002
+wireguard.directory=config/wg