Re: [MMUSIC] RTSP: dest_addr in the response

I am guessing the goal is for a server always to echo the dest_addr parameter specfied by the client, i.e., never to allow something like

C - > S: ... dest_addr="192.1.2.3:4567"

S - > C: ... dest_addr=":4567"

Even though a SHOULD here might imply that this is legal (and as long as the latter were not part of a 463 error response, the implied semantics would be that the server processed the request and will deliver the RTP to the requested host).

Note, C.2.2 specifies echoing for dest_attr in a way which I believe other text in the body of the RFC implies, however it is in the context of a specific use case there so its not clear how generally applicable that is intended to be. Is that echoing specified somewhere else that I missed, or is C.2.2 sufficient to disallow something like above (even if logic should be enough..) ?

thanks,

Mike

HAAS Christian skrev:
> Hello;
>
> From: Behalf Of Rémi Denis-Courmont
>>> Responses to request including the Transport header with a dest_addr
>>> parameter SHALL include the full destination address that is actually
>>> used by the server.
>> I don't really care. I think this informations is of no use to the
>> client anyway.
>
> I also see this of little use for the client -- at most it could verify that
> the IP is actually his own.
> But I'd suggest it to be good practice (SHOULD) to return the full address
> for debugging/tracing.
>

Okay, I was thinking for the same purpose of debugging and verifying
that the server see something that you think are correct. I don't see
any security risks here thus I was thinking of forcing this with a SHALL
for more usability. But I can write a SHOULD also.

Cheers

Magnus Westerlund

IETF Transport Area Director & TSVWG Chair
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Multimedia Technologies, Ericsson Research EAB/TVM
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Ericsson AB | Phone +46 8 4048287
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