I've bound a UDP socket to port 6112, but when I log on, I don't receive a UDP ping packet. Does anyone know why this could happen?

Because you didnt request it duaa joe.
C->S 0x08
C->S 0x09
~-~(HDX)~-~

Thanks!

EDIT -
When are these supposed to be sent? With what header?

0x08
[quote]This message should be sent in response to SID_LOGONCHALLENGE.[/quote]
0x09
[quote]This message should be sent in response to either SID_LOGONCHALLENGEEX or SID_AUTH_INFO.[/quote]
Header:
BYTE PacketID
BYTE NULL
WORD NULL
VOID Data

~-~(HDX)~-~

Thanks.