Wireshark · Wireshark-bugs: [Wireshark-bugs] [Bug 2581] Filter Autocompletion

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https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=2581





--- Comment #5 from Bahaa Naamneh <b.naamneh@xxxxxxxxx>  2008-06-20 10:27:59 PDT ---
(In reply to comment #4)

I'm happy that you liked the idea as I think it's a useful enhancement due to
the large number of protocols Wireshark already supports, and thanks a lot for
your comments.

see my comments below.

> I like this idea a lot, but I've noted some problems while playing with the
> current patch.
> 
> There are lots of places this callback function should be called, or rather it
> should be a replacement for the function used everywhere else.
> 

I'm aware of that, but I just wrote this patch as a "pilot". I’m going to
upload another patch soon.


> Rather than showing the current position in longer list of filter fields, might
> it be possible to restrict the list to those filters matching the current
> prefix?


Well, I used the mechanism that is been used by Wireshark to loads the
protocols and their fields into the memory; Wireshark loads the protocols into
a list and it also load the fields into another list for each protocol, which I
don't think is a good way to load the protocols and their fields into the
memory, a better way is to use a Trie tree for that.

I can show only the filters that match the current prefix, by creating a Trie
tree and loading the protocols and their fields again into that tree.


> I tried pressing down, hoping that the first visible list item would get
> selected, but it didn't.
> 
> This popup list doesn't appear when you delete characters back to the last dot.


Trie tree will help a lot in taking care of a situation when a user deletes
characters.


> Once I clicked on a choice, it was selected immediately.  I'd have preferred it
> to wait until I've pressed enter.
> 
> This is just my opinion, but the ideal behaviour for me would be totally
> keyboard-driver, so I could press down to browse them, enter to select one,
> escape to dismiss the list and return control to the text control.
> 

regarding the keyboard and the crash issues I will take care of that in my next
patch.


Do you think I should ignore the way Wireshark loads the protocols and their
fields into memory and that I create a Trie tree to load them again?



> 
> I did see a couple of crashes while running under gdb:
> 
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 1111388256 (LWP 8242)]
> filter_te_focus_out_cb (filter_te=0x8a900b0, event=0x8342db8, data=0x8ab0ce0)
> at filter_dlg.c:1404
> 1404      if(GTK_IS_WIDGET(data)) {
> (gdb) bt
> #0  filter_te_focus_out_cb (filter_te=0x8a900b0, event=0x8342db8,
> data=0x8ab0ce0) at filter_dlg.c:1404
> #1  0x41b59bee in gtk_marshal_BOOLEAN__VOID () from
> /opt/gnome/lib/libgtk-x11-2.0.so.0
> #2  0x41e878bd in g_closure_invoke () from /opt/gnome/lib/libgobject-2.0.so.0
> #3  0x41e98243 in g_signal_connect_closure_by_id () from
> /opt/gnome/lib/libgobject-2.0.so.0
> #4  0x41e9988f in g_signal_emit_valist () from
> /opt/gnome/lib/libgobject-2.0.so.0
> #5  0x41e99c95 in g_signal_emit () from /opt/gnome/lib/libgobject-2.0.so.0
> #6  0x41c448d8 in gtk_widget_get_default_style () from
> /opt/gnome/lib/libgtk-x11-2.0.so.0
> #7  0x41c505b2 in gtk_window_set_auto_startup_notification () from
> /opt/gnome/lib/libgtk-x11-2.0.so.0
> #8  0x08342db8 in ?? ()
> #9  0x00000000 in ?? ()
> (gdb)      
> 
> 
> A second crash looked like this:
> 
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 1111388256 (LWP 8369)]
> 0x41ea0479 in g_type_check_instance_is_a () from
> /opt/gnome/lib/libgobject-2.0.so.0
> (gdb) bt
> #0  0x41ea0479 in g_type_check_instance_is_a () from
> /opt/gnome/lib/libgobject-2.0.so.0
> #1  0x08084651 in filter_string_te_key_pressed_cb (filter_te=0x8a8cc90,
> event=0x8342d38) at filter_dlg.c:1513
> #2  0x41b59bee in gtk_marshal_BOOLEAN__VOID () from
> /opt/gnome/lib/libgtk-x11-2.0.so.0
> #3  0x41e878bd in g_closure_invoke () from /opt/gnome/lib/libgobject-2.0.so.0
> #4  0x41e98243 in g_signal_connect_closure_by_id () from
> /opt/gnome/lib/libgobject-2.0.so.0
> #5  0x41e9988f in g_signal_emit_valist () from
> /opt/gnome/lib/libgobject-2.0.so.0
> #6  0x41e99c95 in g_signal_emit () from /opt/gnome/lib/libgobject-2.0.so.0
> #7  0x41c448d8 in gtk_widget_get_default_style () from
> /opt/gnome/lib/libgtk-x11-2.0.so.0
> #8  0x41c53bb7 in gtk_window_propagate_key_event () from
> /opt/gnome/lib/libgtk-x11-2.0.so.0
> #9  0x41c56a0c in gtk_window_activate_key () from
> /opt/gnome/lib/libgtk-x11-2.0.so.0
> #10 0x41b59bee in gtk_marshal_BOOLEAN__VOID () from
> /opt/gnome/lib/libgtk-x11-2.0.so.0
> #11 0x41e860c7 in g_value_set_static_boxed () from
> /opt/gnome/lib/libgobject-2.0.so.0
> #12 0x41e878bd in g_closure_invoke () from /opt/gnome/lib/libgobject-2.0.so.0
> #13 0x41e98893 in g_signal_connect_closure_by_id () from
> /opt/gnome/lib/libgobject-2.0.so.0
> #14 0x41e9988f in g_signal_emit_valist () from
> /opt/gnome/lib/libgobject-2.0.so.0
> #15 0x41e99c95 in g_signal_emit () from /opt/gnome/lib/libgobject-2.0.so.0
> #16 0x41c448d8 in gtk_widget_get_default_style () from
> /opt/gnome/lib/libgtk-x11-2.0.so.0
> #17 0x41b5363a in gtk_propagate_event () from
> /opt/gnome/lib/libgtk-x11-2.0.so.0
> #18 0x41b54857 in gtk_main_do_event () from /opt/gnome/lib/libgtk-x11-2.0.so.0
> #19 0x41d5b58a in gdk_add_client_message_filter () from
> /opt/gnome/lib/libgdk-x11-2.0.so.0
> #20 0x42158abd in g_main_context_dispatch () from
> /opt/gnome/lib/libglib-2.0.so.0
> #21 0x4215bcbf in g_main_context_check () from /opt/gnome/lib/libglib-2.0.so.0
> #22 0x4215c069 in g_main_loop_run () from /opt/gnome/lib/libglib-2.0.so.0
> #23 0x41b54cd4 in gtk_main () from /opt/gnome/lib/libgtk-x11-2.0.so.0
> #24 0x0808a8fa in main (argc=0, argv=0xbf8a1c78) at main.c:2584
> (gdb)                                   
> 


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