[vlc-devel] Re: Fix for mms RESET packets

Jean-Paul Saman jean-paul.saman at planet.nl
Sun Dec 18 00:08:56 CET 2005

Patch applied, with some coding style fixes.

Thanks for contributing.

Jean-Paul Saman.

Gregory Hartman wrote:
> I have been trying to use vlc to listen to Naxos Radio under Debian 
> Sarge. I am using the shipped version of Firefox, VLC, and the Mozilla 
> plugin. When I go to the site:
> http://www.naxosradio.com and select a channel I hear music until the 
> end of a song.
> I noticed that I was getting an error:
> invalid chunk FATAL (0x4324), so I did more investigation.
> It turns out that this web site inserts an 8 byte packet at the end of 
> each some with type 0x4324. This seems to correspond to CHUNK_TYPE_RESET 
> in the MMS protocol.
> VLC needs two modifications to continue to decode the stream:
> 1. It should recognize 0x4324 as a valid packet
> 2. It needs to avoid reading 12 bytes for the packet headers, since the 
> reset packet is only 8 bytes
> The sequence numbers appear to go back to 0 after this packet, but the 
> code already handles this condition.
> The attached patch against 0.8.4a fixes the problem. I also checked this 
> against the most recent snapshot and it looks like the patch should 
> still apply.
> I don't know the MMS protool well. There may have been a reason for 
> ignoring the length field and always reading 12 bytes of header data. If 
> so the header reading modification should probably be made sensitive to 
> the packet type.
> Let me know if there is anything else that I need to do.
> Greg Hartman

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