Zigbee stack NCP dissector: new WTAP_ENCAP or extension to 802.15.4?

[Eugene Exarevsky via Wireshark-dev <wireshark-dev () wireshark org>]

Hi all,

We are developing Zigbee protocol stack ZBOSS.
The stack has serial commands interface - NCP.
We implemented a dissector of that NCP protocol for Wireshark and want 
to publish it. The idea is that we can display NCP commands and Zigbee 
traffic between the stack and Zigbee transceiver in the same log.

Now NCP parser is implemented as a part of packet-ieee802154.c. I am not 
sure this is optimal solution. Indeed serial NCP protocol traffic is not 
802.15.4 at all.
Can separate PCAP DLT/WTAP_ENCAP be better?
How complex is to allocate PCAP DLT number?
Or, maybe, it is ok to keep NCP dissector in packet-ieee802154.c?
--

Best Regards,
Eugene

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