3.1.5.31 DPSP_MSG_PINGREPLY
When a DirectPlay 4 client receives a DPSP_MSG_PINGREPLY message (section 2.2.43), it MUST look up the player specified by IDFrom in the Player List. If the ID does not represent a valid player, the client MUST ignore this message. Otherwise, the client MUST also increment the Player.ChatterCount counter.