I'm new to packetbeats so not sure what's supported today. I'd like to build regular expressions as a means to match packets. So think of the types of expressions one can build in wireshark -- eg match on TCP traffic, port foo from prefix bar/20. I'm not looking for packetbeats to do any sort of decode on the packet matches-- just pump counts north to logstash/elastic.
I'd also like to match on non-IP ethernet frames-- no need for decode logic, just punt counts north to logstash/elastic.
Is the above supported today in packetbeats? if so, pointer to a doc which shows a regex example?
If possible in packetbeats but requires development, could you point me to where I'd need to connect into the packetbeat code to exgend to support the regex model?