Wireshark · Ethereal-dev: Re: [Ethereal-dev] How to use dissector_add

[Stefano Pettini <spettini@xxxxxxxxxxxxxxxxxxxxx>]

Guy Harris wrote:

> ...so one possibility would be to make it a preference setting, as per 
> one of Luis Ontanon's suggestions.  You'd have to pick a default port, 
> though - although you could make a port number of 0 mean "don't register 
> it", and make that the default.

Maybe I'll add a default port preference (since there's a good ALC 
implementation that uses port 4001, even if that port is registered at 
IANA for a different purpose).

> No - you could call "dissector_add_handle()" to add it to the list of 
> dissectors that could be dissected based on the UDP port; it takes no 
> port number, so it doesn't cause any particular port to be dissected 
> with the dissector in question, but it does arrange that "Decode As" can 
> be used with a UDP port number.

Thanks. This seems to be the right way to implement a dissector of an 
unspecified UDP port.

Stefano