Can join server without command packet from server

src/main/java/org/adde0109/ambassador/AmbassadorConfig.java

@@ -21,18 +21,22 @@ public class AmbassadorConfig {
   @Expose
   private int serverSwitchCancellationTime = 120;
 
+  @Expose
+  private boolean silenceWarnings = false;
+
   private net.kyori.adventure.text.@MonotonicNonNull Component messageAsAsComponent;
 
-  private AmbassadorConfig(int resetTimeout, String kickResetMessage, int serverSwitchCancellationTime) {
+  private AmbassadorConfig(int resetTimeout, String kickResetMessage, int serverSwitchCancellationTime, boolean silenceWarnings) {
     this.resetTimeout = resetTimeout;
     this.disconnectResetMessage = kickResetMessage;
     this.serverSwitchCancellationTime = serverSwitchCancellationTime;
+    this.silenceWarnings = silenceWarnings;
   };
 
   public void validate() {
     final int connectionTimeout = Ambassador.getInstance().server.getConfiguration().getConnectTimeout();
-    if (resetTimeout >= connectionTimeout) {
-      throw new InvalidValueException("'reset-timeout' can't be more than nor equal to 'connection-timeout': reset-timeout=" + resetTimeout + " connection-timeout=" + connectionTimeout);
+    if (resetTimeout > connectionTimeout) {
+      throw new InvalidValueException("'reset-timeout' can't be more than to 'connection-timeout': reset-timeout=" + resetTimeout + " connection-timeout=" + connectionTimeout);
     }
     if (resetTimeout <= 0) {
       throw new InvalidValueException("'reset-timeout' can't be less than nor equal to zero: reset-timeout=" + resetTimeout);
@@ -57,11 +61,25 @@ public class AmbassadorConfig {
             .build();
     config.load();
 
+    double configVersion;
+    try {
+      configVersion = Double.parseDouble(config.getOrElse("config-version", "1.0"));
+    } catch (NumberFormatException e) {
+      configVersion = 1.0;
+    }
+
+    if (configVersion < 1.1) {
+      config.set("silence-warnings", false);
+      config.set("config-version", "1.1");
+    }
+
     int resetTimeout = config.getIntOrElse("reset-timeout", 3000);
     String kickResetMessage = config.getOrElse("disconnect-reset-message", "Please reconnect");
     int serverSwitchCancellationTime = config.getIntOrElse("server-switch-cancellation-time", 120000);
 
-    return new AmbassadorConfig(resetTimeout, kickResetMessage, serverSwitchCancellationTime);
+    boolean silenceWarnings = config.getOrElse("silence-warnings", false);
+
+    return new AmbassadorConfig(resetTimeout, kickResetMessage, serverSwitchCancellationTime, silenceWarnings);
   }
 
   public int getResetTimeout() {
@@ -82,4 +100,8 @@ public class AmbassadorConfig {
   public int getServerSwitchCancellationTime() {
     return serverSwitchCancellationTime;
   }
+
+  public boolean isSilenceWarnings() {
+    return silenceWarnings;
+  }
 }

src/main/java/org/adde0109/ambassador/forge/pipeline/CommandDecoderErrorCatcher.java

@@ -9,13 +9,14 @@ import com.velocitypowered.proxy.protocol.ProtocolUtils;
 import com.velocitypowered.proxy.protocol.StateRegistry;
 import com.velocitypowered.proxy.protocol.netty.MinecraftDecoder;
 import com.velocitypowered.proxy.protocol.packet.AvailableCommands;
-import com.velocitypowered.proxy.protocol.packet.Disconnect;
 import com.velocitypowered.proxy.util.except.QuietRuntimeException;
 import io.netty.buffer.ByteBuf;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.ChannelInboundHandlerAdapter;
 import io.netty.handler.codec.CorruptedFrameException;
 import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.NamedTextColor;
+import org.adde0109.ambassador.Ambassador;
 import org.jetbrains.annotations.NotNull;
 
 public class CommandDecoderErrorCatcher extends ChannelInboundHandlerAdapter {
@@ -23,6 +24,7 @@ public class CommandDecoderErrorCatcher extends ChannelInboundHandlerAdapter {
   private final StateRegistry.PacketRegistry.ProtocolRegistry registry;
 
   private final ConnectedPlayer player;
+  private boolean sentWarning = false;
 
   public CommandDecoderErrorCatcher(ProtocolVersion protocolVersion, ConnectedPlayer player) {
     this.registry = StateRegistry.PLAY.getProtocolRegistry(ProtocolUtils.Direction.CLIENTBOUND, protocolVersion);
@@ -46,10 +48,13 @@ public class CommandDecoderErrorCatcher extends ChannelInboundHandlerAdapter {
           ((MinecraftDecoder) ctx.pipeline().get(Connections.MINECRAFT_DECODER)).channelRead(ctx, msg);
         } catch (QuietRuntimeException | CorruptedFrameException e) {
           RegisteredServer server = player.getConnectedServer().getServer();
-          player.handleConnectionException(server,
-                  Disconnect.create(Component.text("Ambassador: Unsupported command argument type detected! " +
-                                  "Please install Proxy-Compatible-Forge mod on this backend server."),
-                          player.getProtocolVersion()),true);
+          if (!Ambassador.getInstance().config.isSilenceWarnings() && !sentWarning) {
+            player.sendMessage(Component.text("[Ambassador Warning]: Unsupported command argument type detected! " +
+                    "Please install Proxy-Compatible-Forge mod on this backend server to have access to commands. " +
+                    "This message can be silenced in the ambassador.toml config file.", NamedTextColor.YELLOW));
+            sentWarning = true;
+          }
+
         }
 
       } else {

src/main/resources/default-ambassador.toml

@@ -1,5 +1,5 @@
 # Do not change this
-config-version = "1.0"
+config-version = "1.1"
 
 # How long to wait for the client to reset before disconnecting (In milliseconds)
 reset-timeout = 1000
@@ -8,3 +8,4 @@ reset-timeout = 1000
 disconnect-reset-message = "&6Please reconnect"
 # How much time the player has to reconnect before canceling the server switch. (In seconds)
 server-switch-cancellation-time = 120
+silence-warnings = false