pub const POLL_LEN: usize = 17;Expand description
Poll packet length (17 bytes, both directions in this codec).
Reference: ircDDBGateway/Common/PollData.cpp:186 (return 17U).
The 22-byte DIR_INCOMING variant from the reference is not used
here — both directions are symmetric 17-byte packets, which matches
xlxd’s IsValidKeepAlivePacket accept list
(xlxd/src/cdcsprotocol.cpp:411).