Refer to the Zigbee Direct specification for more details.
Minimum Length 2-byte
Minimum Length 2-byte
Minimum Length 4-byte
Minimum Length 2-byte
Minimum Length 4-byte XXX: spec min doesn't make sense, this is one pan id => 2-byte???
Minimum Length 2-byte
Minimum Length 2-byte
Minimum Length 16-byte
Minimum Length 2-byte XXX: min not in spec???