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>>> ethereal-dev 03/27/06 17:53 >>>
> -----Ursprüngliche Nachricht-----
> Von: Ethereal development <ethereal-dev@xxxxxxxxxxxx>
> Gesendet: 27.03.06 17:40:07
> An: Ethereal development <ethereal-dev@xxxxxxxxxxxx>
> Betreff: Re: [Ethereal-dev] Updated trivial packet-sip.c [patch]
> Hi,
>
> I'm going by the comment Lars made, which mirrors proto.h:451
>
> /** Add a hidden item to a proto_tree.
> @deprecated use proto_tree_add_item() and a subsequent call to
> PROTO_ITEM_SET_HIDDEN() instead */
> extern proto_item *
> proto_tree_add_item_hidden(proto_tree *tree, int hfindex, tvbuff_t *tvb,
> gint start, gint length, gboolean little_endian);
>
>
> I presume you are talking about what is said in
> http://wiki.ethereal.com/Development/DeprecatedFunctions, where it
> suggests using generated fields as an alternative to hidden fields. I
> don't know why the above sequence is now recommended - perhaps it makes
> people think harder about whether they really want a hidden field?
Why not use proto_tree_add_item_hidden() and alike: Making it "harder" to use is one reason. The other one is to reduce bloat of the myriad of proto_tree_add_... functions which makes it hard to find the right function.
Why not use hidden fields at all: The main disadvantage of hidden fields is ... that they are hidden. What's the benefit of a field "nobody" knows of, except of the dissector author?
>
> However, I'm trying to argue that in this case having a hidden field is
> justified and shouldn't be visible. Several sip.auth.* fields appear
> under 4 different sip header fields (sip.Authorization,
> sip.Proxy-Authenticate, sip.Proxy-Authorization and
> sip.WWW-Authenticate). I think its illogical not to have a parent
> sip.auth field also match against any of 4 concrete headers/containers.
> See also these arguments
> (http://www.ethereal.com/lists/ethereal-dev/200603/msg00484.html) I
> wrote on Friday.
>
I don't know the details here.
Regards, ULFL
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