Skip to content

Revert ProtocoLlib Floodgate hack#1326

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
Smart123s wants to merge 2 commits into
base:main
Choose a base branch
from
+11 −48
Open

Revert ProtocoLlib Floodgate hack #1326

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
849c359
Revert ProtocolLib Floodgate Workarounds
Smart123s Aug 16, 2025
8638ae3
Add Floodgate prefix for internal FastLogin checks
Smart123s Aug 16, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
59 changes: 11 additions & 48 deletions ...n/java/com/github/games647/fastlogin/bukkit/listener/protocollib/ProtocolLibListener.java
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -47,7 +47,6 @@
import com.github.games647.fastlogin.core.antibot.AntiBotService.Action;
import com.mojang.datafixers.util.Either;
import io.netty.channel.Channel;
import io.netty.channel.ChannelHandler;
import io.netty.util.AttributeKey;
import org.bukkit.entity.Player;
import org.geysermc.floodgate.api.player.FloodgatePlayer;
Expand DownExpand Up@@ -117,14 +116,6 @@ public void onPacketReceiving(PacketEvent packetEvent) {
plugin.getLog().info("New incoming packet {} from {}", packetType, sender.getName());
try {
if (packetType == START) {
if (plugin.getFloodgateService() != null) {
boolean success = processFloodgateTasks(packetEvent);
if (!success) {
// don't continue execution if the player was kicked by Floodgate
return;
}
}

PacketContainer packet = packetEvent.getPacket();

InetSocketAddress address = sender.getAddress();
Expand DownExpand Up@@ -240,6 +231,17 @@ private void onLoginStart(PacketEvent packetEvent, Player player, String usernam
plugin.removeSession(player.getAddress());

PacketContainer packet = packetEvent.getPacket();

//floodgate event listeners may run after our event listener
if (plugin.getFloodgateService() != null) {
FloodgatePlayer floodgatePlayer = getFloodgatePlayer(packetEvent.getPlayer());
if (floodgatePlayer != null) {
//add the floodgate prefix for our internal checks
//the correct username will be written to the packet by Floodgate
username = floodgatePlayer.getCorrectUsername();
}
}

Optional<ClientPublicKey> clientKey;
if (new MinecraftVersion(1, 19, 3).atOrAbove()) {
// public key is sent separate
Expand DownExpand Up@@ -308,43 +310,4 @@ private static Channel getChannel(Player player) {
return FuzzyReflection.getFieldValue(injector, Channel.class, true);
}

/**
* Reimplementation of the tasks injected Floodgate in ProtocolLib that are not run due to a bug
* @see <a href="https://github.com/GeyserMC/Floodgate/issues/143">Issue Floodgate#143</a>
* @see <a href="https://github.com/GeyserMC/Floodgate/blob/5d5713ed9e9eeab0f4abdaa9cf5cd8619dc1909b/spigot/src/main/java/org/geysermc/floodgate/addon/data/SpigotDataHandler.java#L121-L175">Floodgate/SpigotDataHandler</a>
* @param packetEvent the PacketEvent that won't be processed by Floodgate
* @return false if the player was kicked
*/
private boolean processFloodgateTasks(PacketEvent packetEvent) {
PacketContainer packet = packetEvent.getPacket();
Player player = packetEvent.getPlayer();
FloodgatePlayer floodgatePlayer = getFloodgatePlayer(player);
if (floodgatePlayer == null) {
return true;
}

// kick the player, if necessary
Channel channel = getChannel(packetEvent.getPlayer());
AttributeKey<String> kickMessageAttribute = AttributeKey.valueOf("floodgate-kick-message");
String kickMessage = channel.attr(kickMessageAttribute).get();
if (kickMessage != null) {
player.kickPlayer(kickMessage);
return false;
}

// add prefix
String username = floodgatePlayer.getCorrectUsername();
if (packet.getGameProfiles().size() > 0) {
packet.getGameProfiles().write(0,
new WrappedGameProfile(floodgatePlayer.getCorrectUniqueId(), username));
} else {
packet.getStrings().write(0, username);
}

// remove real Floodgate data handler
ChannelHandler floodgateHandler = channel.pipeline().get("floodgate_data_handler");
channel.pipeline().remove(floodgateHandler);

return true;
}
}
Loading