ask about dissector_add ( ) function to instruct wireshark to pass packet to my dissector

[Changqin Xia <xiachangqin66 () hotmail com>]

Hi, all

I am a newbie on dissector development. I have a question about the "dissector_add( )" function.

I went through a few examples, most of them are using "tcp.port" or "udp.port" or something like that.

My dissector not uses any port number to instruct wireshark to pass packets to my dissector, my dissector is using 
"Magic" (the first byte).  

Any one can tell me if I use the magic number to realize dissector_add( ) function, what should I do?  any example? any 
other dissector in the same way? or Any part on the "README.developer" talking about this?

Thanks

John

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