code cleanup

src/main/kotlin/com/github/creeper123123321/viaaas/handler/BackEndInit.kt

@@ -19,6 +19,6 @@ class BackEndInit(val connectionData: ConnectionData) : ChannelInitializer<Chann
             // compress
             .addLast("via-codec", ViaCodec(user))
             .addLast("mc", MinecraftCodec())
-            .addLast("handler", MinecraftHandler(connectionData, connectionData.frontChannel, frontEnd = false))
+            .addLast("handler", MinecraftHandler(connectionData, frontEnd = false))
     }
 }

src/main/kotlin/com/github/creeper123123321/viaaas/handler/FrontEndInit.kt

@@ -19,7 +19,7 @@ object FrontEndInit : ChannelInitializer<Channel>() {
             .addLast("mc", MinecraftCodec())
             .addLast(
                 "handler", MinecraftHandler(
-                    ConnectionData(frontChannel = ch), other = null, frontEnd = true
+                    ConnectionData(frontChannel = ch), frontEnd = true
                 )
             )
     }

src/main/kotlin/com/github/creeper123123321/viaaas/handler/MinecraftHandler.kt

@@ -11,10 +11,10 @@ import java.net.SocketAddress
 
 class MinecraftHandler(
     val data: ConnectionData,
-    var other: Channel?,
     val frontEnd: Boolean
 ) : SimpleChannelInboundHandler<Packet>() {
     var remoteAddress: SocketAddress? = null
+    val other: Channel? get() = if (frontEnd) data.backChannel else data.frontChannel
 
     override fun channelRead0(ctx: ChannelHandlerContext, packet: Packet) {
         if (ctx.channel().isActive) {

src/main/kotlin/com/github/creeper123123321/viaaas/handler/state/HandshakeState.kt

@@ -89,9 +89,7 @@ class HandshakeState : MinecraftConnectionState {
                     if (it.isSuccess) {
                         mcLogger.info("Connected ${handler.remoteAddress} -> $socketAddr")
 
-                        val backChan = future.channel() as SocketChannel
-                        handler.data.backChannel = backChan
-                        handler.other = backChan
+                        handler.data.backChannel = future.channel() as SocketChannel
 
                         forward(handler, packet, true)