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Fix Bungee injection on Java 12+

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Fixes #1512
This commit is contained in:
KennyTV 2019-12-20 16:35:10 +01:00
parent fddbeda81e
commit 5cb5992d44
1 changed files with 28 additions and 18 deletions
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46
bungee/src/main/java/us/myles/ViaVersion/bungee/platform/BungeeViaInjector.java
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@ -9,28 +9,43 @@ import us.myles.ViaVersion.bungee.handlers.BungeeChannelInitializer;
import us.myles.ViaVersion.util.ReflectionUtil;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.List;
public class BungeeViaInjector implements ViaInjector {
@Override
public void inject() throws Exception {
try {
try {
Class<?> pipelineUtils = Class.forName("net.md_5.bungee.netty.PipelineUtils");
Field field = pipelineUtils.getDeclaredField("SERVER_CHILD");
field.setAccessible(true);
Class<?> pipelineUtils = Class.forName("net.md_5.bungee.netty.PipelineUtils");
Field field = pipelineUtils.getDeclaredField("SERVER_CHILD");
field.setAccessible(true);
// Remove any final stuff
Field modifiersField = Field.class.getDeclaredField("modifiers");
modifiersField.setAccessible(true);
modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);
BungeeChannelInitializer newInit = new BungeeChannelInitializer((ChannelInitializer<Channel>) field.get(null));
field.set(null, newInit);
} catch (NoSuchFieldException e) {
throw new Exception("Unable to find core component 'childHandler', please check your plugins. issue: ");
// Remove the final modifier (unless removed by a fork)
int modifiers = field.getModifiers();
if (Modifier.isFinal(modifiers)) {
try {
Field modifiersField = Field.class.getDeclaredField("modifiers");
modifiersField.setAccessible(true);
modifiersField.setInt(field, modifiers & ~Modifier.FINAL);
} catch (NoSuchFieldException e) {
// Java 12 compatibility *this is fine*
Method getDeclaredFields0 = Class.class.getDeclaredMethod("getDeclaredFields0", boolean.class);
getDeclaredFields0.setAccessible(true);
Field[] fields = (Field[]) getDeclaredFields0.invoke(Field.class, false);
for (Field classField : fields) {
if ("modifiers".equals(classField.getName())) {
classField.setAccessible(true);
classField.set(field, modifiers & ~Modifier.FINAL);
break;
}
}
}
}
BungeeChannelInitializer newInit = new BungeeChannelInitializer((ChannelInitializer<Channel>) field.get(null));
field.set(null, newInit);
} catch (Exception e) {
Via.getPlatform().getLogger().severe("Unable to inject ViaVersion, please post these details on our GitHub and ensure you're using a compatible server version.");
throw e;
@ -62,11 +77,6 @@ public class BungeeViaInjector implements ViaInjector {
Class<?> pipelineUtils = Class.forName("net.md_5.bungee.netty.PipelineUtils");
Field field = pipelineUtils.getDeclaredField("SERVER_CHILD");
field.setAccessible(true);
// Remove any final stuff
Field modifiersField = Field.class.getDeclaredField("modifiers");
modifiersField.setAccessible(true);
modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);
return (ChannelInitializer<Channel>) field.get(null);
}