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Re: [MMUSIC] [AVTCORE] New Possible Errata in RFC2326 (And Draft) regarding Blocksize

worley@ariadne.com (Dale R. Worley) Fri, 30 January 2015 03:10 UTC

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To: Julius Friedman <juliusfriedman@gmail.com>
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Subject: Re: [MMUSIC] [AVTCORE] New Possible Errata in RFC2326 (And Draft) regarding Blocksize
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Julius Friedman <juliusfriedman@gmail.com> writes:
> ", it seems
> to me that it counts only the bytes after the "RTP Fixed Header Fields"
> and any RTP header extensions, and that number legitimately could be
> small (depending on the media encoding in the RTP).
> "
>
> - There must be 12 octets which are the fixed header, this is where that
> information comes from.

That's incorrect.  See the text you quoted earlier:

   12.7 Blocksize

   This request header field is sent from the client to the media server
   asking the server for a particular media packet size. This packet
   size does not include lower-layer headers such as IP, UDP, or
   RTP. [...]

Note that it says "This packet size does not include ... headers such as
... RTP."  The RTP header is *not* counted in this blocksize, so its 12
octets do not constitute a minimum allowed value of blocksize

Dale

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