/*
### 5.3. PULL_ACK packet ###
That packet type is used by the server to confirm that the network route is
open and that the server can send PULL_RESP packets at any time.
Bytes | Function
:------:|---------------------------------------------------------------------
0 | protocol version = 2
1-2 | same token as the PULL_DATA packet to acknowledge
3 | PULL_ACK identifier 0x04
*/
use simple_down_packet;
use ;
use ;
simple_down_packet!;