Fix Issues with Offline State (#49)

Author: Alemiz112

transport-raknet/src/main/java/org/cloudburstmc/netty/handler/codec/raknet/client/RakClientOfflineHandler.java

@@ -76,14 +76,21 @@ public void handlerRemoved(ChannelHandlerContext ctx) throws Exception {
     }
 
     private void onRetryAttempt(Channel channel) {
-        switch (this.state) {
-            case HANDSHAKE_1:
+        if (this.rakChannel.config().getOption(RakChannelOption.RAK_COMPATIBILITY_MODE)) {
+            if (this.state != RakOfflineState.HANDSHAKE_COMPLETED) {
                 this.sendOpenConnectionRequest1(channel);
                 this.connectionAttempts++;
-                break;
-            case HANDSHAKE_2:
-                this.sendOpenConnectionRequest2(channel);
-                break;
+            }
+        } else {
+            switch (this.state) {
+                case HANDSHAKE_1:
+                    this.sendOpenConnectionRequest1(channel);
+                    this.connectionAttempts++;
+                    break;
+                case HANDSHAKE_2:
+                    this.sendOpenConnectionRequest2(channel);
+                    break;
+            }
         }
     }
 
@@ -158,6 +165,8 @@ private void onOpenConnectionReply1(ChannelHandlerContext ctx, ByteBuf buffer) {
         if (security) {
             this.cookie = buffer.readInt();
             this.security = true;
+        } else {
+            this.security = false;
         }
         int mtu = buffer.readShort();