Wireshark · Wireshark-dev: Re: [Wireshark-dev] Appending string to value

[Jeff Morriss <jeff.morriss@xxxxxxxxxxx>]

[BTW, it's better to compose a new email rather than reply to an 
existing one on a different topic when sending to public mailing lists.]

Amit Khullar wrote:
> Hi All,
>
> I am new to wireshark dissector development, hence a help would be 
> really appreciated.
> I want to print and additional string with the value of the field in the 
> message decode window.
> This string I want to print is not a constant but varies depending upon 
> the value of the field.
> Is there some routine which I can use after adding the value(hex) with 
> proto_add_tree_item().

From proto.h:

> /** Append to text of item after it has already been created.
>  @param ti the item to append the text to
>  @param format printf like format string
>  @param ... printf like parameters */
> extern void proto_item_append_text(proto_item *ti, const char *format, ...)
> 	GNUC_FORMAT_CHECK(printf, 2,3);

Or you can use one of the _format() functions to completely control the 
output.