https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=4664
Chris Maynard <christopher.maynard@xxxxxxxxx> changed:
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--- Comment #12 from Chris Maynard <christopher.maynard@xxxxxxxxx> 2010-04-20 15:17:01 PDT ---
Created an attachment (id=4549)
--> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=4549)
Updated patch #2.
This patch handles the post-processing of the Linux USB pseudo header data in
both libpcap_read() and libpcap_seek_read(). Earlier I had forgotten about the
seek. In making that change, I also changed the arg list to
pcap_read_post_process() to only pass exactly what is needed and to make it
more generic.
Reverted the atm_guess_xyz_type() stuff for now as I don't know if it's common
or not to pcapng.
Made the necessary changes to pcapng.
Changed the byte swapping macros used to account for possibly unaligned memory
read/write. Now using PBSWAPX instead of GUINTX_SWAP_LE_BE.
This patch also adds the changes I was working on to the PPP dissector to be
able to pass off dissection from USB -> PPP, and was the whole reason why I
became interested in fixing up the USB dissector in the first place. With this
change, I now see a protocol stack like [USB URB/PPP In HDLC-Like
Framing/PPP/IP/GRE/IP/UDP/MYPROTO] in appropriate frames, rather than just [USB
URB].
Test with previously attached capture file or the USB capture files posted
here:
http://wiki.wireshark.org/SampleCaptures#head-886e340c31ca977f321c921f81cbec4c21bb7738.
In particular, if you look at usb_memory_stick.pcap, besides the hex bytes
being displayed now, you'll also notice how some frames (e.g., 1-22, ...) now
appear as USBHUB instead of USB. I'm not entirely sure why this changed, but I
assume the new behavior is correct. I may be able to provide additional packet
captures for testing/verification, but I would have to sanitize some of them
first.
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