Hi all, I've been doing some hacking on Rat over the last couple of days and found a couple of issues that I've attempted to address. The attached patch is against ag-media in AG2.3, and makes the following changes:
Update config.{guess|sub} to newer versions. This is necessary to
compile on AMD64 architecture, and possibly some others.
Drop the built-in DES support used by mbus and rtp in favour
of using OpenSSL's implementation. The implementation
included in UCL-common dates back to '93 and has a number of
portability issues. It would fail to work correctly under
certain combinations of compiler and flags, causing mbus to
fail. This in turn caused Rat to hang on startup (and fail to
display the UI), exchanging corrupted mbus packets with
itself. I updated the RTP encryption to use OpenSSL while I
was at it.
Fix RTP packet structures. The struct used to decode RTP
had the 'interesting' implementation feature of putting a
bunch of management variables at the front and calculating the
offset in memory to the actual data. Unfortunately this
completely failed to take account of such things and pointer
alignments and structure padding, and only worked in 32 bits
by coincidence. It completely fails when compiled for
64-bit. I've reworked this to be a bit more explicit about
what it's doing and using the standard offsetof macro to
calculate offsets.
This also includes Linux Alsa support.
Could interested parties please test this. The patch and notes are also
available online here:
http://people.vislab.usyd.edu.au/~ssmith/patches/
Cheers,
Steve
--
Steve Smith, SysAdmin/Programmer | "When you have no nails your hammer grows
Vislab, University of Sydney | restless, and you begin to throw sideways
Phone: (02) 9351 5967 | glances at screws and pieces of string."
Email: ssm...@vislab.usyd.edu.au | -- Jarkko Hietaniemi
ag2.3-alsa-mbus-rtp-ssl.diff.gz
Description: ag2.3-alsa-mbus-rtp-ssl.diff.gz
