How to check if packet is malformed using Wireshark

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1

Hi Experts.
Anyone knows how do I know if my packet is malformed by wireshark dissector or its actually malformed?

2

It’s not possible to be sure but you can guess.
If you are confident that dissector is working fine (e.g. proprietary dissectors used by R&D as compared to open source free dissectors) then its likely the packet.
Another way to guess is: if destination doesn’t throw an error back it means packet it received was fine. In which case its likely that dissector is wrong.

3

Thanks,
Do you mean like if I have IP A and IP B .
IP A send packet to IP B and lets say dissector consider it as malformed (I see it in wireshark considered as malformed).

So do you mean if IP B send to IP A without throwing any error then that means its dissector issue (wrong decoding)?

4

Yes, correct.