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This draft is a work item of the Multiparty Multimedia Session Control Working Group of the IETF.
Title : Session Description Protocol (SDP) Source Filters
Author(s) : B. Quinn, R. Finlayson
Filename : draft-ietf-mmusic-sdp-srcfilter-03.txt
Pages : 10
Date : 2003-2-18
This document describes how to adapt the Session Description Protocol
(SDP) to express one or more source addresses as a source filter for
one or more destination 'connection' addresses. It defines the syntax
and semantics for an SDP 'source-filter' attribute that may reference
either IPv4 or IPv6 address(es) as either an inclusive or exclusive
source list for either multicast or unicast destinations. In particular,
an inclusive source-filter can be used to specify a Source-Specific
Multicast (SSM) session.
Receiver applications are expected use the SDP source-filter
information to identify traffic from legitimate senders and discard
traffic from illegitimate senders. Applications and hosts may also
share the source-filter information with network elements (e.g., with
routers using IGMPv3) so they can potentially perform the traffic
filtering operation further 'upstream,' closer to the source(s).
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