Thanks! ive just overseen those examples -.-

however, i managed to get the right packet size now, but how can i add the magic number the server asks for?

// magic value for messages
const uint32_t MSG_MAGIC = 0x46474653;  // "FGFS"
// protocoll version
const uint32_t PROTO_VER = 0x00010001;  // 1.1
[download]