I'm dissecting a custom protocol for my company. Unfortunately, one
side of the interface is broken and we don't have the code for it.
I've been using tcp_dissect_pdus to handle the protocol, but
occasionally the length (first two bytes of the packets) is bad.
I've coded a resilient method to resync the data, but I can't figure
out how to get the information to tcp_dissect_pdus from the length
callback routine. I need about 20 bytes to recover, but if I return
8 for the packet length to get around 8 bytes of garbage,
tcp_dissect_pdus ignores the rest of the packet.
What is the feeling. Should I just copy the code from
tcp_dissect_pdus into my dissector or should I use tvb_new_subset
from inside of the length routine?
Sure wish there was a simple way to get around this.
Harry
