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Setting a field in header of a protocol as optional in Wireshark?

原文 2018-11-15 02:40:51 5 0 c/ networking/ wireshark/ wireshark-dissector

I am an absolute newbie when it comes to Wireshark development. I just started making a protocol dissector in C, but the protocol that I am dissecting has many different types of messages and their headers differs in just one field, can I set that field to be optional in any way? If that cannot be done, what are the options to make such a dissector?

Just for reference, I am making a dissector that works on a protocol that sends FIX messages.

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