[Guy Harris <guy@xxxxxxxxxxxx>]

On Nov 16, 2008, at 6:55 PM, Stephen Fisher wrote:

> Correct, PacketLogger files do not have a magic number.

Do PacketLogger files have a default file extension?

If we were to associate with some file types an extension, then we  
could have the Wiretap open routine:

	first try the open routines for file formats that have magic numbers  
(regardless of whether that file format has a file extension or, if  
so, whether it matches the file's extension);

	then try the open routine for any heuristic file format that has the  
file's extension associated with it (after stripping off .gz);

	then try the other heuristic open routines;

so that the extension is used as a hint for the file type.

(We could also use that as the default extension when saving the file  
in a given format.)