Yes the TCOS SDK is really a gold mine! Thanks again for pointing it to me. The .u files you achieved to analyze sadly cannot help me without the scripts inside. :/

 

About the C2S_CS_CREATE_CHARACTER, I have the doc but I'm interested to see what you find Slink, since this is all bitwise operation stuff so mistakes are easily made!

About the S2C_CS_CREATE_CHARACTER_ACK, I am currently reversing it, part of it are the same as in the world login I had started to reverse.

The thing is, the data is not layouted in the same way than in the C2S packet. For instance I think I will skip the arms tattoo part for a moment because it's tricky and not major stuff. (hello I shift the bits 5 to right, then 3 to left, then 4, lalala).

 

Edit: well, I should really update the doc because I'm stuck on the S2C_CS_SELECTED_CHARACTER_ACK message... The status code seems to be a unconventional one. The client just wants one DWORD, but I don't know what to put in it. The code analyzing the message is in a script, so I can't reverse it easily... The only value between 0 and 100 generating a specific error message is "2" while all the others I tried generate the same generic error message (character ID or account id does not work either). Maybe it wants a checksum, but a checksum of what, I don't know!