Connection packet

Header

Size	Format	Description
2 bytes	16 bit integer (hexa)	Type of packet (f4be)
2 bytes	16 bit integer (hexa)	Function ID
4 bytes	32 bit integer (hexa)	Private client ID of packet (can be NULL if the client is connecting and has not received his IDs yet)
4 bytes	32 bit integer (hexa)	Public client ID (can be NULL if the client is connecting and has not received his IDs yet)
4 bytes	32 bits integer	Counter
4 bytes	32 bit integer	Checksum

Keepalives

Client : sending keepalives (0xf4be0100)

Just the 20 bytes of the header

Server : replying to a keepalive (0xf4be0200)

Size	Format	Description
4 bytes	32 bit integer	The counter of the keepalive we are sending a reply for (bytes 20-23 of the client keepalive)