Hi,
I'm writing a dissector for a new RTP protocol. Because it is high rate, it extends the standard RTP sequence number from 16-bits to 32-bits by having a "sequence number extension" field to hold the high 16 bits.
What would be really nice in my dissector would be to be able to show the full 32-bit sequence number by reading the 16-bit sequence number from the standard RTP dissector (which is the parent of my dissector), and then combining this with the extension.
Is it possible to easily read a field from a parent protocol in this way?
I've seen some similar questions, but they were all about two custom protocol dissectors interacting, not a custom one interacting with a built in one (so I can't and don't want to change the existing RTP dissector)
