https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5771
Summary: Add heuristic dissector for images and HTTP
Product: Wireshark
Version: SVN
Platform: All
OS/Version: All
Status: NEW
Severity: Enhancement
Priority: Low
Component: Wireshark
AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
ReportedBy: doj@xxxxxxxxx
Created an attachment (id=6046)
--> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=6046)
Add heuristic dissector for images and HTTP
Build Information:
works for all.
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The attachted source code patch will add a heuristic dissector for the image
types PNG, GIF, JFIF. I've registered them for the HTTP protocol, since I was
working on that, but it might make sense for other protocols as well (FTP comes
to mind). Detection of those image formats should be very reliable, since they
all feature a dedicated signature to check against.
To demonstrate the changes I have attachted a sample capture file. It is a
simple web site request from a web browser and the three image formats. I have
manually edited the capture file to invalidate the HTTP Content-Type header (it
is now type "XXXXXXXXXX"), so the HTTP dissector can not work on the media type
as it normally would. With the heuristic patch applied the HTTP response body
is correctly identified as the image.
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