keepalive

这是一个关于linux下上外网的drcom1.4.4

36 bytes

Every 10 seconds, we send a keepalive packet to the server.

struct drcom_host_msg
{
  u_int8_t msgtype;
  u_int8_t msg[19];
  struct drcom_auth auth_info;
} __attribute__ ((__packed__));

msgtype is 0xff.

The first 16 bytes of msg is checksum0 of drcom_login_packet.
The rest of msg is NULL.

auth_info is obtained in acknowledgement in the login process.