Wireshark mailing list archives
Re: Undissected packet bytes
From: Evan Huus <eapache () gmail com>
Date: Wed, 4 Feb 2015 09:52:18 -0500
I'm not sure why it would work differently in the two places if those print statements are the same. In general I would expect the requirements for that method to be: - *after* full dissection is finished - dissection must have been run with the full tree enabled (as when selecting a packet in the GUI) If those two are met I think it should work. As a side note, I would expect that method to be *very* slow, since it traverses the entire tree for every byte of the packet. Traversing the tree once and maintaining a set of covered/uncovered ranges would be much more efficient. On Wed, Feb 4, 2015 at 4:51 AM, Dario Lombardo <dario.lombardo.ml () gmail com> wrote:
Hi Evan This looks promising. Where can I use this call? If I run it from within a dissector packet-hpfeeds.c:344 (just an example... for purpose of testing) for (i = 0; i < len; i++) { fi = proto_find_field_from_offset(tree, i, tvb); g_print("TEST1 %p %d %p => %p\n", tree, i, tvb, fi); } it always returns NULL. If I run it from the gtk gui packet-panes.c:369 g_print("TEST2 %p %d %p => %p\n", tree, byte, tvb, finfo); it returns a (valid?) pointer. The 2 prints show the same values of pointer/offsets. Where should a "for" routine like the above could be added in the code so it shows every undissected byte in every dissector? Thanks. Dario. On Tue, Feb 3, 2015 at 6:15 PM, Evan Huus <eapache () gmail com> wrote:As far as I know this is not currently available, but it would probably be fairly useful and easy. You just need to iterate the proto tree and keep track of which byte ranges are claimed/unclaimed. proto_find_field_from_offset does something related to this (it is used for matching bytes to fields in the UI) so it's probably a good place to start. On Tue, Feb 3, 2015 at 12:08 PM, Dario Lombardo <dario.lombardo.ml () gmail com> wrote:Hi list I was wondering if there is a comfortable way to find out undissected bytes in packets. This would be useful to find incomplete dissectors. Any hint? Thanks! Dario. ___________________________________________________________________________ Sent via: Wireshark-dev mailing list <wireshark-dev () wireshark org> Archives: http://www.wireshark.org/lists/wireshark-dev Unsubscribe: https://wireshark.org/mailman/options/wireshark-dev mailto:wireshark-dev-request () wireshark org?subject=unsubscribe___________________________________________________________________________ Sent via: Wireshark-dev mailing list <wireshark-dev () wireshark org> Archives: http://www.wireshark.org/lists/wireshark-dev Unsubscribe: https://wireshark.org/mailman/options/wireshark-dev mailto:wireshark-dev-request () wireshark org?subject=unsubscribe___________________________________________________________________________ Sent via: Wireshark-dev mailing list <wireshark-dev () wireshark org> Archives: http://www.wireshark.org/lists/wireshark-dev Unsubscribe: https://wireshark.org/mailman/options/wireshark-dev mailto:wireshark-dev-request () wireshark org?subject=unsubscribe
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Current thread:
- Undissected packet bytes Dario Lombardo (Feb 03)
- Re: Undissected packet bytes Evan Huus (Feb 03)
- Re: Undissected packet bytes Alexis La Goutte (Feb 03)
- Re: Undissected packet bytes Michal Labedzki (Feb 04)
- Re: Undissected packet bytes Dario Lombardo (Feb 04)
- Re: Undissected packet bytes Alexis La Goutte (Feb 03)
- Re: Undissected packet bytes Dario Lombardo (Feb 04)
- Re: Undissected packet bytes Evan Huus (Feb 04)
- Re: Undissected packet bytes Dario Lombardo (Feb 04)
- Re: Undissected packet bytes Evan Huus (Feb 04)
- Re: Undissected packet bytes Dario Lombardo (Feb 04)
- Re: Undissected packet bytes Evan Huus (Feb 04)
- Re: Undissected packet bytes Dario Lombardo (Feb 05)
- Re: Undissected packet bytes Evan Huus (Feb 05)
- Re: Undissected packet bytes Dario Lombardo (Feb 05)
- Re: Undissected packet bytes Dario Lombardo (Feb 05)
- Re: Undissected packet bytes Evan Huus (Feb 05)
- Re: Undissected packet bytes Michal Labedzki (Feb 05)
- Re: Undissected packet bytes Evan Huus (Feb 03)