Doubts_in_writting_dissector

["nikhil tripathi" <tripathi_nik1 () rediffmail com>]

Hi

While writing new plugin i have some doubts as below:

1:Why the global_port_number is important and how wiresahrk use thi?
2:How wireshark choose protocol to dissect the cpaturing data?
3.How we write new plugin when we don't know the port number can we wirte plugin ?

Regards
Nikhil

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