[Bug 795284] pcapparse: give error on fragmented IP packets

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=795284

--- Comment #4 from Antonio Ospite <ao2 at ao2.it> ---
In the particular case of LumixLink_captureStill.pcap I managed to come up with
a dumb mechanism to get all the fragments downstream.

However in general fragment reassembling is not super trivial, fragments can
arrive out of order, and AFAIU fragments from different packets can be
interleaved, so some state tracking with supplementary data structures is
needed. And to detect incomplete packets some timeout mechanism is needed. See
https://tools.ietf.org/html/rfc815

pcapparse seems to parse things as they come with no state tracking whatsoever
so some refactoring seems to be needed, unless I am missing something.

Not something I can tackle right now, so I went for the
at-least-admit-your-limits way.

Ciao,
   Antonio

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