draft-ietf-mmusic-sdp-srcfilter-07.txt   draft-ietf-mmusic-sdp-srcfilter-08.txt 
Network Working Group Bob Quinn Network Working Group Bob Quinn
INTERNET-DRAFT Celox Networks INTERNET-DRAFT Celox Networks
Category: Standards Track Ross Finlayson Category: Standards Track Ross Finlayson
Expires: December 2005 LIVE.COM Expires: December 2005 LIVE.COM
June 6, 2005 June 14, 2005
Session Description Protocol (SDP) Source Filters Session Description Protocol (SDP) Source Filters
<draft-ietf-mmusic-sdp-srcfilter-07.txt> <draft-ietf-mmusic-sdp-srcfilter-08.txt>
Status of this Memo Status of this Memo
By submitting this Internet-Draft, each author represents that By submitting this Internet-Draft, each author represents that
any applicable patent or other IPR claims of which he or she is any applicable patent or other IPR claims of which he or she is
aware have been or will be disclosed, and any of which he or she aware have been or will be disclosed, and any of which he or she
becomes aware will be disclosed, in accordance with Section 6 of becomes aware will be disclosed, in accordance with Section 6 of
BCP 79. BCP 79.
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
skipping to change at line 109 skipping to change at line 109
3. The "source-filter" Attribute 3. The "source-filter" Attribute
The SDP source-filter attribute does not change any existing SDP The SDP source-filter attribute does not change any existing SDP
syntax or semantics, but defines a format for additional session syntax or semantics, but defines a format for additional session
description information. Specifically, source-filter syntax can description information. Specifically, source-filter syntax can
prescribe one or more unicast addresses as either legitimate or prescribe one or more unicast addresses as either legitimate or
illegitimate sources for any (or all) SDP session description illegitimate sources for any (or all) SDP session description
"connection-address" field values. "connection-address" field values.
Note that the unicast source addresses specified by this attribute Note that the unicast source addresses specified by this attribute
are those that are seen by a receiver. If source addresses undergo are those that are seen by a receiver. Therefore, if source
translation en route from the original sender to the receiver addresses undergo translation en route from the original sender to
- e.g., due to NAT (Network Address Translation) or some tunneling the receiver - e.g., due to NAT (Network Address Translation) or some
mechanism - then the SDP "source-filter" attribute - as presented to tunneling mechanism - then the SDP "source-filter" attribute - as
the receiver - MUST be translated accordingly. presented to the receiver, will not be accurate, unless the source
addresses therein are also translated accordingly.
The source-filter attribute has the following syntax: The source-filter attribute has the following syntax:
a=source-filter: <filter-mode> <filter-spec> a=source-filter: <filter-mode> <filter-spec>
The <filter-mode> is either "incl" or "excl" (for inclusion or The <filter-mode> is either "incl" or "excl" (for inclusion or
exclusion, respectively). The <filter-spec> has four sub-components: exclusion, respectively). The <filter-spec> has four sub-components:
<nettype> <address-types> <dest-address> <src-list> <nettype> <address-types> <dest-address> <src-list>
skipping to change at line 585 skipping to change at line 586
; "*" applies to all connection-address values. ; "*" applies to all connection-address values.
; IP4-address, IP6-address, FQDN are as defined ; IP4-address, IP6-address, FQDN are as defined
; in [SDP]. ; in [SDP].
src-list = *(addr SP) unicast-address src-list = *(addr SP) unicast-address
; one or more unicast source addresses (in ; one or more unicast source addresses (in
; standard IPv4 or IPv6 ASCII-notation form) ; standard IPv4 or IPv6 ASCII-notation form)
; or FQDNs. ; or FQDNs.
; unicast-address is as defined in [SDP]. ; unicast-address is as defined in [SDP].
Expires: December 2005 June 6, 2005 Expires: December 2005 June 14, 2005
 End of changes. 

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