How to interpret packets received from Habbo?

[DemonLord]

Hello,
By sniffing in Habbo, I get a hexadecimal value, for example:

00 00 00 06 06 b4 b3 7d a9 c6

From this package I understand that:

---

00 00 00 06

Corresponds to the size of the package.

---

06 b4

A package identifier.

---

b3 7d a9 c6

An integer.

---

Thanks to the package ID I know:
- Name -> FurniListRemoveEvent
- Namespace -> _-XB
- Class -> _-31L

When it comes to a small packet like the one in the example, it is easy to interpret, but when it comes to packets larger than 500 bytes it is already a problem.

How to interpret a long packet in the simplest way?

Greetings.

 

[The General]

You have to get the packet structure from the client. So you look up the class and then its message parser.

All messages are defined in

HabboMessages

From there you can look up the identifier and find the corresponding event class.

Now in the event class you fill find in the constructor a call to its base constructor with the corresponding message parser type.

Example:

        public function _SafeStr_2925(k:Function)
        {
            super(k, _SafeStr_4642);
        }

Then search for class _SafeStr_4642 and you'll find the parser:

public function parse(k:_SafeStr_2717):Boolean
        {
            if (k.bytesAvailable)
            {
                this._SafeStr_16561 = k._SafeStr_10975();
            };
            return (true);
        }

The argument k is the message buffer and any calls on it reads some data. In my case

_SafeStr_10975

reads an int. But this can also be a short, string, single byte or unsigned. The easiest way to check what type it is is to see what it gets assigned to. In my case

this._SafeStr_16561

which is

private var _SafeStr_16561:int;

You can also use G-Earth to obtain packets and structures. You dont really need to do packet logging in order to build an emulator. Its just handy to get a feel of what the values might be. When working on Arcturus and Sirius, I only used logging a couple times when I just couldn't figure it out from the scripts.

 

[DemonLord]

Thank you!