Adding a Reconnect button to manually restore the connection

ice-adapter/src/main/java/com/faforever/iceadapter/IceAdapter.java

@@ -92,7 +92,7 @@ public static void onHostGame(String mapName) {
     public static void onJoinGame(String remotePlayerLogin, int remotePlayerId) {
         log.info("onJoinGame {} {}", remotePlayerId, remotePlayerLogin);
         createGameSession();
-        int port = gameSession.connectToPeer(remotePlayerLogin, remotePlayerId, false);
+        int port = gameSession.connectToPeer(remotePlayerLogin, remotePlayerId, false, 0);
 
         GPGNetServer.clientFuture.thenAccept(gpgNetClient -> {
             gpgNetClient.getLobbyFuture().thenRun(() -> {
@@ -108,7 +108,7 @@ public static void onConnectToPeer(String remotePlayerLogin, int remotePlayerId,
         }
 
         log.info("onConnectToPeer {} {}, offer: {}", remotePlayerId, remotePlayerLogin, String.valueOf(offer));
-        int port = gameSession.connectToPeer(remotePlayerLogin, remotePlayerId, offer);
+        int port = gameSession.connectToPeer(remotePlayerLogin, remotePlayerId, offer, 0);
 
         GPGNetServer.clientFuture.thenAccept(gpgNetClient -> {
             gpgNetClient.getLobbyFuture().thenRun(() -> {

ice-adapter/src/main/java/com/faforever/iceadapter/debug/DebugWindowController.java

@@ -1,13 +1,17 @@
 package com.faforever.iceadapter.debug;
 
+import com.faforever.iceadapter.IceAdapter;
 import javafx.event.ActionEvent;
 import javafx.fxml.FXML;
 import javafx.scene.control.*;
 import javafx.scene.control.cell.PropertyValueFactory;
 import javafx.scene.layout.HBox;
+import javafx.util.Callback;
 import lombok.extern.slf4j.Slf4j;
 import org.slf4j.LoggerFactory;
 
+import java.util.Objects;
+
 
 @Slf4j
 public class DebugWindowController {
@@ -33,6 +37,7 @@ public class DebugWindowController {
 	public TableColumn loginColumn;
 	public TableColumn offerColumn;
 	public TableColumn connectedColumn;
+	public TableColumn buttonReconnect;
 	public TableColumn stateColumn;
 	public TableColumn rttColumn;
 	public TableColumn lastColumn;
@@ -51,6 +56,12 @@ public void onKillAdapterClicked(ActionEvent actionEvent) {
 		System.exit(337);
 	}
 
+	public void reconnectToPeer(DebugWindow.DebugPeer peer) {
+		if (Objects.nonNull(peer)) {
+			new Thread(() -> IceAdapter.gameSession.reconnectToPeer(peer.getId())).start();
+		}
+	}
+
 	@FXML
 	private void initialize() {
 		if(Debug.ENABLE_DEBUG_WINDOW_LOG_TEXT_AREA) {
@@ -71,6 +82,30 @@ private void initialize() {
 		localCandColumn.setCellValueFactory(new PropertyValueFactory<>("localCandidate"));
 		remoteCandColumn.setCellValueFactory(new PropertyValueFactory<>("remoteCandidate"));
 
+		buttonReconnect.setCellFactory(new Callback<TableColumn, TableCell>() {
+			@Override
+			public TableCell<DebugWindow.DebugPeer, DebugWindow.DebugPeer> call(TableColumn param) {
+				return new TableCell<>() {
+					final Button btn = new Button("reconnect");
+
+					@Override
+					protected void updateItem(DebugWindow.DebugPeer item, boolean empty) {
+						super.updateItem(item, empty);
+						setText(null);
+						if (empty) {
+							setGraphic(null);
+						} else {
+							btn.setOnAction(event -> {
+								DebugWindow.DebugPeer peer = getTableRow().getItem();
+								reconnectToPeer(peer);
+							});
+							setGraphic(btn);
+						}
+					}
+				};
+			}
+		});
+
 		killAdapterButton.setOnAction(this::onKillAdapterClicked);
 	}
 }

ice-adapter/src/main/java/com/faforever/iceadapter/ice/GameSession.java

@@ -52,8 +52,8 @@ public GameSession() {
      *
      * @return the port the ice adapter will be listening/sending for FA
      */
-    public int connectToPeer(String remotePlayerLogin, int remotePlayerId, boolean offer) {
-        Peer peer = new Peer(this, remotePlayerId, remotePlayerLogin, offer);
+    public int connectToPeer(String remotePlayerLogin, int remotePlayerId, boolean offer, int preferredPort) {
+        Peer peer = new Peer(this, remotePlayerId, remotePlayerLogin, offer, preferredPort);
         peers.put(remotePlayerId, peer);
         debug().connectToPeer(remotePlayerId, remotePlayerLogin, offer);
         return peer.getFaSocket().getLocalPort();
@@ -72,6 +72,23 @@ public void disconnectFromPeer(int remotePlayerId) {
         //TODO: still attempting to ICE
     }
 
+    /**
+     * Does a manual {@link #disconnectFromPeer} and {@link #connectToPeer}.
+     * Uses the same port that was on the previous connection.
+     */
+    public void reconnectToPeer(Integer remotePlayerId) {
+        Peer reconnectPeer = peers.get(remotePlayerId);
+        if (Objects.nonNull(reconnectPeer)) {
+            String remotePlayerLogin = reconnectPeer.getRemoteLogin();
+            boolean offer = reconnectPeer.isLocalOffer();
+            int port = reconnectPeer.getFaSocket()
+                    .getLocalPort();
+
+            disconnectFromPeer(remotePlayerId);
+            connectToPeer(remotePlayerLogin, remotePlayerId, offer, port);
+        }
+    }
+
     /**
      * Stops the connection to all peers and all ice agents
      */

ice-adapter/src/main/java/com/faforever/iceadapter/ice/Peer.java

@@ -19,19 +19,23 @@ public class Peer {
     private final int remoteId;
     private final String remoteLogin;
     private final boolean localOffer;//Do we offer or are we waiting for a remote offer
+    private final int preferredPort;
 
-    private PeerIceModule ice = new PeerIceModule(this);
+    public volatile boolean closing = false;
+
+    private final PeerIceModule ice = new PeerIceModule(this);
     private DatagramSocket faSocket;//Socket on which we are listening for FA / sending data to FA
 
-    public Peer(GameSession gameSession, int remoteId, String remoteLogin, boolean localOffer) {
+    public Peer(GameSession gameSession, int remoteId, String remoteLogin, boolean localOffer, int preferredPort) {
         this.gameSession = gameSession;
         this.remoteId = remoteId;
         this.remoteLogin = remoteLogin;
         this.localOffer = localOffer;
+        this.preferredPort = preferredPort;
 
-        log.debug("Peer created: {}, {}, localOffer: {}", remoteId, remoteLogin, String.valueOf(localOffer));
+        log.debug("Peer created: {}, localOffer: {}, preferredPort: {}", getPeerIdentifier(), String.valueOf(localOffer), preferredPort);
 
-        initForwarding();
+        initForwarding(preferredPort);
 
         if (localOffer) {
             new Thread(ice::initiateIce).start();
@@ -41,9 +45,9 @@ public Peer(GameSession gameSession, int remoteId, String remoteLogin, boolean l
     /**
      * Starts waiting for data from FA
      */
-    private void initForwarding() {
+    private void initForwarding(int port) {
         try {
-            faSocket = new DatagramSocket(0);
+            faSocket = new DatagramSocket(port);
         } catch (SocketException e) {
             log.error("Could not create socket for peer: {}", getPeerIdentifier(), e);
         }
@@ -65,8 +69,11 @@ synchronized void onIceDataReceived(byte data[], int offset, int length) {
             faSocket.send(packet);
         } catch (UnknownHostException e) {
         } catch (IOException e) {
-            log.error("Error while writing to local FA as peer (probably disconnecting from peer) " + getPeerIdentifier(), e);
-            return;
+            if (closing) {
+                log.debug("Ignoring error the send packet because the connection was closed {}", getPeerIdentifier());
+            } else {
+                log.error("Error while writing to local FA as peer (probably disconnecting from peer) {}", getPeerIdentifier(), e);
+            }
         }
     }
 
@@ -81,29 +88,30 @@ private void faListener() {
                 faSocket.receive(packet);
                 ice.onFaDataReceived(data, packet.getLength());
             } catch (IOException e) {
-                log.debug("Error while reading from local FA as peer (probably disconnecting from peer) " + getPeerIdentifier(), e);
+                if (closing) {
+                    log.debug("Ignoring error the receive packet because the connection was closed as peer {}", getPeerIdentifier());
+                } else {
+                    log.debug("Error while reading from local FA as peer (probably disconnecting from peer) {}", getPeerIdentifier(), e);
+                }
                 return;
             }
         }
         log.debug("No longer listening for messages from FA");
     }
 
-    public volatile boolean closing = false;
     public void close() {
         if(closing) {
             return;
         }
 
-        log.info("Closing peer for player {}", getRemoteId());
+        log.info("Closing peer for player {}", getPeerIdentifier());
 
         closing = true;
         if(faSocket != null) {
             faSocket.close();
         }
 
-        if(ice != null) {
-            ice.close();
-        }
+        ice.close();
     }
 
     /**

ice-adapter/src/main/resources/debugWindow.fxml

@@ -56,6 +56,7 @@
                     <TableColumn fx:id="idColumn" prefWidth="40.0" text="id" />
                     <TableColumn fx:id="loginColumn" prefWidth="150.0" text="login" />
                     <TableColumn fx:id="connectedColumn" prefWidth="90.0" text="connected" />
+                    <TableColumn fx:id="buttonReconnect" prefWidth="90.0" text="reconnect"/>
                     <TableColumn fx:id="localCandColumn" prefWidth="70.0" text="local" />
                     <TableColumn fx:id="remoteCandColumn" prefWidth="70.0" text="remote" />
                     <TableColumn fx:id="stateColumn" prefWidth="100.0" text="state" />