package cpw.mods.fml.common.network;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelOutboundHandlerAdapter;
import io.netty.channel.ChannelPromise;
import io.netty.channel.embedded.EmbeddedChannel;
import io.netty.util.AttributeKey;
import java.util.List;
import net.minecraft.entity.player.EntityPlayerMP;
import net.minecraft.network.NetworkManager;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Sets;
import cpw.mods.fml.common.FMLCommonHandler;
import cpw.mods.fml.common.network.NetworkRegistry.TargetPoint;
import cpw.mods.fml.common.network.handshake.NetworkDispatcher;
import cpw.mods.fml.common.network.internal.FMLProxyPacket;
import cpw.mods.fml.relauncher.Side;
public class FMLOutboundHandler extends ChannelOutboundHandlerAdapter {
public static final AttributeKey<OutboundTarget> FML_MESSAGETARGET = new AttributeKey<OutboundTarget>("fml:outboundTarget");
public static final AttributeKey<Object> FML_MESSAGETARGETARGS = new AttributeKey<Object>("fml:outboundTargetArgs");
public enum OutboundTarget {
/**
* The packet is sent nowhere. It will be on the {@link EmbeddedChannel#outboundMessages()} Queue.
*
* @author cpw
*
*/
NOWHERE(Sets.immutableEnumSet(Side.CLIENT, Side.SERVER))
{
@Override
public void validateArgs(Object args)
{
// NOOP
}
@Override
public List<NetworkDispatcher> selectNetworks(Object args, ChannelHandlerContext context, FMLProxyPacket packet)
{
return null;
}
},
/**
* The packet is sent to the {@link NetworkDispatcher} supplied as an argument.
*
* @author cpw
*
*/
DISPATCHER(Sets.immutableEnumSet(Side.SERVER))
{
@Override
public void validateArgs(Object args)
{
if (!(args instanceof NetworkDispatcher))
{
throw new RuntimeException("DISPATCHER expects a NetworkDispatcher");
}
}
@Override
public List<NetworkDispatcher> selectNetworks(Object args, ChannelHandlerContext context, FMLProxyPacket packet)
{
return ImmutableList.of((NetworkDispatcher)args);
}
},
/**
* The packet is sent to the originator of the packet. This requires the inbound packet
* to have it's originator information set.
*
* @author cpw
*
*/
REPLY(Sets.immutableEnumSet(Side.SERVER))
{
@Override
public void validateArgs(Object args)
{
// NOOP
}
@Override
public List<NetworkDispatcher> selectNetworks(Object args, ChannelHandlerContext context, FMLProxyPacket packet)
{
return ImmutableList.of(packet.getDispatcher());
}
},
/**
* The packet is sent to the {@link EntityPlayerMP} supplied as an argument.
*
* @author cpw
*
*/
PLAYER(Sets.immutableEnumSet(Side.SERVER))
{
@Override
public void validateArgs(Object args)
{
if (!(args instanceof EntityPlayerMP))
{
throw new RuntimeException("PLAYER target expects a Player arg");
}
}
@Override
public List<NetworkDispatcher> selectNetworks(Object args, ChannelHandlerContext context, FMLProxyPacket packet)
{
EntityPlayerMP player = (EntityPlayerMP) args;
NetworkDispatcher dispatcher = player == null ? null : player.playerNetServerHandler.netManager.channel().attr(NetworkDispatcher.FML_DISPATCHER).get();
return dispatcher == null ? ImmutableList.<NetworkDispatcher>of() : ImmutableList.of(dispatcher);
}
},
/**
* The packet is dispatched to all players connected to the server.
* @author cpw
*
*/
ALL(Sets.immutableEnumSet(Side.SERVER))
{
@Override
public void validateArgs(Object args)
{
}
@SuppressWarnings("unchecked")
@Override
public List<NetworkDispatcher> selectNetworks(Object args, ChannelHandlerContext context, FMLProxyPacket packet)
{
ImmutableList.Builder<NetworkDispatcher> builder = ImmutableList.<NetworkDispatcher>builder();
for (EntityPlayerMP player : (List<EntityPlayerMP>)FMLCommonHandler.instance().getMinecraftServerInstance().getConfigurationManager().playerEntityList)
{
NetworkDispatcher dispatcher = player.playerNetServerHandler.netManager.channel().attr(NetworkDispatcher.FML_DISPATCHER).get();
if (dispatcher != null) builder.add(dispatcher);
}
return builder.build();
}
},
/**
* The packet is sent to all players in the dimension identified by the integer argument.
* @author cpw
*
*/
DIMENSION(Sets.immutableEnumSet(Side.SERVER))
{
@Override
public void validateArgs(Object args)
{
if (!(args instanceof Integer))
{
throw new RuntimeException("DIMENSION expects an integer argument");
}
}
@SuppressWarnings("unchecked")
@Override
public List<NetworkDispatcher> selectNetworks(Object args, ChannelHandlerContext context, FMLProxyPacket packet)
{
int dimension = (Integer)args;
ImmutableList.Builder<NetworkDispatcher> builder = ImmutableList.<NetworkDispatcher>builder();
for (EntityPlayerMP player : (List<EntityPlayerMP>)FMLCommonHandler.instance().getMinecraftServerInstance().getConfigurationManager().playerEntityList)
{
if (dimension == player.dimension)
{
NetworkDispatcher dispatcher = player.playerNetServerHandler.netManager.channel().attr(NetworkDispatcher.FML_DISPATCHER).get();
// Null dispatchers may exist for fake players - skip them
if (dispatcher != null) builder.add(dispatcher);
}
}
return builder.build();
}
},
/**
* The packet is sent to all players within range of the {@link TargetPoint} argument supplied.
*
* @author cpw
*
*/
ALLAROUNDPOINT(Sets.immutableEnumSet(Side.SERVER))
{
@Override
public void validateArgs(Object args)
{
if (!(args instanceof TargetPoint))
{
throw new RuntimeException("ALLAROUNDPOINT expects a TargetPoint argument");
}
}
@SuppressWarnings("unchecked")
@Override
public List<NetworkDispatcher> selectNetworks(Object args, ChannelHandlerContext context, FMLProxyPacket packet)
{
TargetPoint tp = (TargetPoint)args;
ImmutableList.Builder<NetworkDispatcher> builder = ImmutableList.<NetworkDispatcher>builder();
for (EntityPlayerMP player : (List<EntityPlayerMP>)FMLCommonHandler.instance().getMinecraftServerInstance().getConfigurationManager().playerEntityList)
{
if (player.dimension == tp.dimension)
{
double d4 = tp.x - player.posX;
double d5 = tp.y - player.posY;
double d6 = tp.z - player.posZ;
if (d4 * d4 + d5 * d5 + d6 * d6 < tp.range * tp.range)
{
NetworkDispatcher dispatcher = player.playerNetServerHandler.netManager.channel().attr(NetworkDispatcher.FML_DISPATCHER).get();
if (dispatcher != null) builder.add(dispatcher);
}
}
}
return builder.build();
}
},
/**
* The packet is sent to the server this client is currently conversing with.
* @author cpw
*
*/
TOSERVER(Sets.immutableEnumSet(Side.CLIENT))
{
@Override
public void validateArgs(Object args)
{
}
@Override
public List<NetworkDispatcher> selectNetworks(Object args, ChannelHandlerContext context, FMLProxyPacket packet)
{
NetworkManager clientConnection = FMLCommonHandler.instance().getClientToServerNetworkManager();
return clientConnection == null || clientConnection.channel().attr(NetworkDispatcher.FML_DISPATCHER).get() == null ? ImmutableList.<NetworkDispatcher>of() : ImmutableList.of(clientConnection.channel().attr(NetworkDispatcher.FML_DISPATCHER).get());
}
};
private OutboundTarget(ImmutableSet<Side> sides)
{
this.allowed = sides;
}
public final ImmutableSet<Side> allowed;
public abstract void validateArgs(Object args);
public abstract List<NetworkDispatcher> selectNetworks(Object args, ChannelHandlerContext context, FMLProxyPacket packet);
}
@Override
public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception
{
if (!(msg instanceof FMLProxyPacket))
{
return;
}
FMLProxyPacket pkt = (FMLProxyPacket) msg;
OutboundTarget outboundTarget;
Object args = null;
NetworkDispatcher dispatcher = ctx.channel().attr(NetworkDispatcher.FML_DISPATCHER).get();
// INTERNAL message callback - let it pass out
if (dispatcher != null)
{
ctx.write(msg, promise);
return;
}
outboundTarget = ctx.channel().attr(FML_MESSAGETARGET).get();
Side channelSide = ctx.channel().attr(NetworkRegistry.CHANNEL_SOURCE).get();
if (outboundTarget != null && outboundTarget.allowed.contains(channelSide))
{
args = ctx.channel().attr(FML_MESSAGETARGETARGS).get();
outboundTarget.validateArgs(args);
}
else if (channelSide == Side.CLIENT)
{
outboundTarget = OutboundTarget.TOSERVER;
}
else
{
throw new FMLNetworkException("Packet arrived at the outbound handler without a valid target!");
}
List<NetworkDispatcher> dispatchers = outboundTarget.selectNetworks(args, ctx, pkt);
// This will drop the messages into the output queue at the embedded channel
if (dispatchers == null)
{
ctx.write(msg, promise);
promise.setSuccess();
return;
}
for (NetworkDispatcher targetDispatcher : dispatchers)
{
targetDispatcher.sendProxy((FMLProxyPacket) msg);
}
promise.setSuccess();
}
}