OK, and by falling some tags I can see that a NULL callback is allowed. I will fix some of them.
> -----Original Message----- > From: Guy Harris [mailto:[EMAIL PROTECTED] > Sent: Monday, December 01, 2003 3:28 PM > To: [EMAIL PROTECTED] > Cc: Ethereal > Subject: Re: [Ethereal-dev] Patch to M2UA to allow a preference for an > old Draft 7 Protocol Data 1 parameter tag > > > > On Dec 1, 2003, at 2:51 PM, Michael Lum wrote: > > > I copied the preference code I used from another dissector. > > Dissectors whose preference settings include port numbers often do > that, so that if the port number changes the dissector will be > unregistered from the old port number and registered with the new port > number. > > For dissectors that don't have a port number as a preference, it's not > necessary.
