Problème paquet 226 - Too much data

[krm35]

Plop,

Merci pour ton super décoder. J'essaye d'extraire les infos du paquet 226 (MapComplementaryInformationsDataMessage) mais le programme lève une exception. Est-il possible que le protocole ait changé ou le problème vient d'une mauvaise récupération de la payload ?

[louisabraham]

Ca marche maintenant, merci @kenny94xxhell pour #21

[louisabraham]

L'update n'a fait que reconstruire le protocole (protocol.js ou protocol.pk en local).

[krm35]

L'id du MapComplementaryInformationsDataMessage était 226 et est maintenant devenu 906. Sinon, certaines maps ne sont pas décodées correctement par exemple le zaap brak en -26,35:

https://louisabraham.github.io/LaBot/decoder.html?hex=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

[louisabraham]

Je n'ai pas acces aux sources de dofus en ce moment, ca va etre complique pour moi de debug.

[krm35]

je vais voir ce que je peux faire

[louisabraham]

C'est etrange, j'ai l'impression que ce paquet est pas complet. Normalement la longueur des donnees devrait etre 4741 d'apres le header, alors que l'hexa complet fait 1460. Je pense que tu as un probleme de buffer.

Il y a parfois des problemes d'ordre entre les paquets dans le sniffeur, je te recommande d'utiliser le MITM de preference.

[krm35]

Pour le coup, j'utilise mon MITM codé en node.js mais d'après la doc https://nodejs.org/api/net.html#net_event_data je vois pas de limite max sur la taille du buffer

const socket = new net.Socket();

socket.connect({host: ip, port: port});

socket.on('data', function (data) {
    const header = data.readInt16BE(0);
    if (usefull_headers.includes(header)) {
        console.log(header + " " + data.toString('hex'));
    }
});

[krm35]

Peut-être que le serveur envoie la payload en 2 fois et que mon MITM ne gère pas ce cas ?

C'est bien ça le problème Ici j'ai reçu le paquet en deux fois, donc aucun problème my bad

906 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[louisabraham]

Oui, il faut utiliser un buffer comme dans LaBot. Je ne lis pas de message tant qu'il n'y a pas suffisament de bytes dans le buffer.

[krm35]

hello, juste une petite question, c'est bien la méthode lenlenData qui permet de savoir en combien de messages la payload est envoyée ?

    def lenlenData(self):
        if len(self.data) > 65535:
            return 3
        if len(self.data) > 255:
            return 2
        if len(self.data) > 0:
            return 1
        return 0

[louisabraham]

Lenlendata est le nombre de bytes sur lesquels la longueur du paquet est encodée