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Cancel lengthy plugin channels on Spigot

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Fixes #1859
This commit is contained in:
KennyTV 2020-06-30 09:35:37 +02:00
parent d59749fb03
commit 26de3fe573
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1 changed files with 25 additions and 0 deletions
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25
common/src/main/java/us/myles/ViaVersion/protocols/protocol1_16to1_15_2/Protocol1_16To1_15_2.java
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@ -181,6 +181,22 @@ public class Protocol1_16To1_15_2 extends Protocol<ClientboundPackets1_15, Clien
}
});
// Spigot has the arbitrary limit of 32 in 1.15, upped to 64 in 1.16
if (isSpigot()) {
registerIncoming(ServerboundPackets1_16.PLUGIN_MESSAGE, new PacketRemapper() {
@Override
public void registerMap() {
handler(wrapper -> {
String channel = wrapper.passthrough(Type.STRING);
if (channel.length() > 32) {
Via.getPlatform().getLogger().warning("Ignoring incoming plugin channel, as it is longer than 32 characters: " + channel);
wrapper.cancel();
}
});
}
});
}
registerIncoming(ServerboundPackets1_16.PLAYER_ABILITIES, new PacketRemapper() {
@Override
public void registerMap() {
@ -270,4 +286,13 @@ public class Protocol1_16To1_15_2 extends Protocol<ClientboundPackets1_15, Clien
userConnection.put(new ClientWorld(userConnection));
}
}
private boolean isSpigot() {
try {
Class.forName("org.spigotmc.SpigotConfig");
return true;
} catch (ClassNotFoundException e) {
return false;
}
}
}