2011/3/23 Neel Neelakantan <[email protected]>:
> Read the parts of RFC 3261 that describe the maddr.
>
>   A client that sends a request to a multicast address MUST add the
>   "maddr" parameter to its Via header field value containing the
>   destination multicast address, and for IPv4, SHOULD add the "ttl"
>   parameter with a value of 1.  Usage of IPv6 multicast is not defined
>   in this specification, and will be a subject of future
>   standardization when the need arises.

Yes, RFC 3261 talks about "maddr" and also about S/MIME. And... where
is S/MIME? who does use it? nobody, of course.

It's just better to fully ignore "maddr" param. It can be a security
hole as it overrides the mechanism of loose-routing.

-- 
Iñaki Baz Castillo
<[email protected]>

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