expose raw vhost (#1423)

api/src/main/java/com/velocitypowered/api/proxy/InboundConnection.java

@@ -26,11 +26,20 @@ public interface InboundConnection {
 
   /**
    * Returns the hostname that the user entered into the client, if applicable.
-   *
+   * <br/>
+   * This is partially processed, including removing a trailing dot, and discarding data after a null byte.
+
    * @return the hostname from the client
    */
   Optional<InetSocketAddress> getVirtualHost();
 
+  /**
+   * Returns the raw hostname that the client sent, if applicable.
+   *
+   * @return the raw hostname from the client
+   */
+  Optional<String> getRawVirtualHost();
+
   /**
    * Determine whether or not the player remains online.
    *

proxy/src/main/java/com/velocitypowered/proxy/connection/client/AuthSessionHandler.java

@@ -96,7 +96,7 @@ public class AuthSessionHandler implements MinecraftSessionHandler {
 
       // Initiate a regular connection and move over to it.
       ConnectedPlayer player = new ConnectedPlayer(server, profileEvent.getGameProfile(),
-          mcConnection, inbound.getVirtualHost().orElse(null), onlineMode,
+          mcConnection, inbound.getVirtualHost().orElse(null), inbound.getRawVirtualHost().orElse(null), onlineMode,
           inbound.getIdentifiedKey());
       this.connectedPlayer = player;
       if (!server.canRegisterConnection(player)) {

proxy/src/main/java/com/velocitypowered/proxy/connection/client/ConnectedPlayer.java

@@ -155,6 +155,7 @@ public class ConnectedPlayer implements MinecraftConnectionAssociation, Player,
    */
   private final MinecraftConnection connection;
   private final @Nullable InetSocketAddress virtualHost;
+  private final @Nullable String rawVirtualHost;
   private GameProfile profile;
   private PermissionFunction permissionFunction;
   private int tryIndex = 0;
@@ -191,12 +192,13 @@ public class ConnectedPlayer implements MinecraftConnectionAssociation, Player,
   private final ChatBuilderFactory chatBuilderFactory;
 
   ConnectedPlayer(VelocityServer server, GameProfile profile, MinecraftConnection connection,
-                  @Nullable InetSocketAddress virtualHost, boolean onlineMode,
+                  @Nullable InetSocketAddress virtualHost, @Nullable String rawVirtualHost, boolean onlineMode,
                   @Nullable IdentifiedKey playerKey) {
     this.server = server;
     this.profile = profile;
     this.connection = connection;
     this.virtualHost = virtualHost;
+    this.rawVirtualHost = rawVirtualHost;
     this.permissionFunction = PermissionFunction.ALWAYS_UNDEFINED;
     this.connectionPhase = connection.getType().getInitialClientPhase();
     this.onlineMode = onlineMode;
@@ -356,6 +358,11 @@ public class ConnectedPlayer implements MinecraftConnectionAssociation, Player,
     return Optional.ofNullable(virtualHost);
   }
 
+  @Override
+  public Optional<String> getRawVirtualHost() {
+    return Optional.ofNullable(rawVirtualHost);
+  }
+
   void setPermissionFunction(PermissionFunction permissionFunction) {
     this.permissionFunction = permissionFunction;
   }

proxy/src/main/java/com/velocitypowered/proxy/connection/client/HandshakeSessionHandler.java

@@ -243,6 +243,11 @@ public class HandshakeSessionHandler implements MinecraftSessionHandler {
       return Optional.ofNullable(ping.getVhost());
     }
 
+    @Override
+    public Optional<String> getRawVirtualHost() {
+      return getVirtualHost().map(InetSocketAddress::getHostName);
+    }
+
     @Override
     public boolean isActive() {
       return !connection.isClosed();

proxy/src/main/java/com/velocitypowered/proxy/connection/client/InitialInboundConnection.java

@@ -63,6 +63,11 @@ public final class InitialInboundConnection implements VelocityInboundConnection
     return Optional.of(InetSocketAddress.createUnresolved(cleanedAddress, handshake.getPort()));
   }
 
+  @Override
+  public Optional<String> getRawVirtualHost() {
+    return Optional.of(handshake.getServerAddress());
+  }
+
   @Override
   public boolean isActive() {
     return connection.getChannel().isActive();

proxy/src/main/java/com/velocitypowered/proxy/connection/client/LoginInboundConnection.java

@@ -71,6 +71,11 @@ public class LoginInboundConnection implements LoginPhaseConnection, KeyIdentifi
     return delegate.getVirtualHost();
   }
 
+  @Override
+  public Optional<String> getRawVirtualHost() {
+    return delegate.getRawVirtualHost();
+  }
+
   @Override
   public boolean isActive() {
     return delegate.isActive();