Packet sniffing & analysis

hi everyone, im new into packet sniffing & analysis
i did send some packets to mmo game just for test
it did work pretty good but packets keep changing every time i restart the game
why is that ?

There's no specific answer to this question as there are multiple reasons why packets could be changing. Since it changes with a restart and (probably) not during the game running it sounds like a session-dependent "issue".

I can think of two mechanisms that could cause this behaviour:

- (Bad) Encryption with session key
- "Randomization" of packet-id's (somehow negotiated during handshake)

Look at the code before the send method to see what they are doing or possibly the code after the first recv :)