[Guy Harris <guy@xxxxxxxxxxxx>]

Guy Harris wrote:

> However, that *still* means it's called more than once.  When a capture 
> file is read in, each packet is dissected.  After that, every time you 
> click on a packet, it's dissected again.

I.e., even if we arrange that the dissector is only called once when you 
click on a packet, that still means it can be called more than once 
overall, as it'll be called once when the file is read, and then it'll 
be called every time you click on the packet, every time you print that 
packet or export it as text to a file, every time you run a statistical 
tap, etc., so all dissectors must support being called multiple times on 
the same packet.