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From: "Rafael Gustavo Gassner" <rgg@rla13.pucpr.br>
To: lartc@vger.kernel.org
Subject: [LARTC] RTP packet filtering
Date: Tue, 30 Sep 2003 21:13:36 +0000	[thread overview]
Message-ID: <marc-lartc-106495649725886@msgid-missing> (raw)

Hi all,

     I need to allow RTP packages on my network, but don´t want to 
allow all UDP (And then ill try to priorize it), so i think i could do 
that using u32. I can see that all packages that are RTP have a field 
80 00, as shown below (It is the protocol version and payload type):

0000 xx xx xx xx xx xx xx xx     xx xx xx xx xx xx xx xx
0010 xx xx xx xx xx xx xx xx     xx xx xx xx xx xx xx xx
0020 xx xx xx xx xx xx xx xx     xx xx 80 00 xx xx xx xx

     Could someone give me a tip on how should the u32 filter look like?

Thanks a lot,

Rafael Gustavo Gassner



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             reply	other threads:[~2003-09-30 21:13 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-09-30 21:13 Rafael Gustavo Gassner [this message]
  -- strict thread matches above, loose matches on Subject: below --
2003-10-01 13:29 [LARTC] RTP packet filtering Lawrence MacIntyre

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