Add Protocol constants

Signed-off-by: Graham <gpe@openrs2.org>

archive/src/main/kotlin/org/openrs2/archive/cache/Js5ChannelInitializer.kt

@@ -6,18 +6,13 @@ import io.netty.handler.timeout.ReadTimeoutHandler
 import org.openrs2.protocol.Protocol
 import org.openrs2.protocol.Rs2Decoder
 import org.openrs2.protocol.Rs2Encoder
-import org.openrs2.protocol.login.ClientOutOfDateCodec
-import org.openrs2.protocol.login.InitJs5RemoteConnectionCodec
-import org.openrs2.protocol.login.IpLimitCodec
-import org.openrs2.protocol.login.Js5OkCodec
-import org.openrs2.protocol.login.ServerFullCodec
 
 public class Js5ChannelInitializer(private val handler: Js5ChannelHandler) : ChannelInitializer<Channel>() {
     override fun initChannel(ch: Channel) {
         ch.pipeline().addLast(
             ReadTimeoutHandler(30),
-            Rs2Encoder(Protocol(InitJs5RemoteConnectionCodec)),
+            Rs2Encoder(Protocol.LOGIN_UPSTREAM),
-            Rs2Decoder(Protocol(Js5OkCodec, ClientOutOfDateCodec, IpLimitCodec, ServerFullCodec)),
+            Rs2Decoder(Protocol.LOGIN_DOWNSTREAM),
             handler
         )
     }

protocol/src/main/kotlin/org/openrs2/protocol/Protocol.kt

@@ -1,5 +1,12 @@
 package org.openrs2.protocol
 
+import org.openrs2.protocol.login.ClientOutOfDateCodec
+import org.openrs2.protocol.login.InitJaggrabConnectionCodec
+import org.openrs2.protocol.login.InitJs5RemoteConnectionCodec
+import org.openrs2.protocol.login.IpLimitCodec
+import org.openrs2.protocol.login.Js5OkCodec
+import org.openrs2.protocol.login.ServerFullCodec
+
 public class Protocol(vararg codecs: PacketCodec<*>) {
     private val decoders = arrayOfNulls<PacketCodec<*>>(256)
     private val encoders = codecs.associateBy(PacketCodec<*>::type)
@@ -19,4 +26,17 @@ public class Protocol(vararg codecs: PacketCodec<*>) {
     public fun <T : Packet> getEncoder(type: Class<T>): PacketCodec<T>? {
         return encoders[type] as PacketCodec<T>?
     }
+
+    public companion object {
+        public val LOGIN_UPSTREAM: Protocol = Protocol(
+            InitJs5RemoteConnectionCodec,
+            InitJaggrabConnectionCodec
+        )
+        public val LOGIN_DOWNSTREAM: Protocol = Protocol(
+            Js5OkCodec,
+            ClientOutOfDateCodec,
+            ServerFullCodec,
+            IpLimitCodec
+        )
+    }
 }