Subject: [ssm] Re: FYI: Updated SSM-capable applications

From: Marshall Eubanks <[email-masked]>
Date: Wed, 23 Apr 2003 08:17:17 -0400

Dear Ross;

Is there any authentication applied to the unicast SSM rtcp reports, 
which
can be used for a denial of service attacks ?

                                   Regards
                                   Marshall Eubanks

On Wednesday, April 23, 2003, at 06:33 AM, Ross Finlayson wrote:

> Some of you who are working with Source-Specific Multicast may be 
> interested in new versions of several multicast applications, which I 
> have recently updated to conform to the latest SSM-relevant Internet 
> Drafts:
>
> 1/ SSM sending applications
> 	(i) When generating SDP descriptions, include appropriate
> 		a=source-filter: incl ...
> 	and
> 		a=rtcp: unicast reflection
> 	lines.
> 	(ii) Receive incoming RTCP Reception Reports via unicast, and 
> 'reflect' them
> 	back to the group via multicast.
>
> - "vobStreamer" (a DVD audio/video streaming tool): 
> <http://www.live.com/vobStreamer/>
> - "liveCaster" (a MP3 RTP streaming tool - SSM sending is optional): 
> <http://www.live.com/liveCaster>
> - "testMP3Streamer", "testMPEGVideoStreamer", 
> "testMPEGAudioVideoStreamer" (various streaming test programs - SSM 
> sending is optional): <http://www.live.com/liveMedia/>
>
> 2/ SSM receiving applications
> 	(i) Use the IP_ADD_SOURCE_MEMBERSHIP and IP_DROP_SOURCE_MEMBERSHIP 
> "setsockopt()" calls (instead of the regular IP_ADD_MEMBERSHIP and 
> IP_DROP_MEMBERSHIP, but falling back to using these if the *SOURCE* 
> versions aren't supported).
> 	(ii) Send back RTCP Reception Reports via unicast rather than 
> multicast.
>
> - "MPlayer" (a media player - will use SSM if specified by RTSP and/or 
> SDP): <http://www.live.com/mplayer/>
> - The "in_rtp.dll" MP3/RTP plugin for Winamp: 
> <http://www.live.com/multikit/winamp-plugin.html>
> - "playRTPMPEG" (a MP3/RTP receiving tool): 
> <http://www.live.com/multikit/playRTPMPEG.html>
> - "testMP3Receiver", "testMPEGVideoReceiver" (various receiving test 
> programs - SSM is optional): <http://www.live.com/liveMedia/>
>
> 	Ross.
>
>

T.M. Eubanks
Multicast Technologies, Inc.
e-mail : [email-masked]
http://www.multicasttech.com

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