Juha Heinanen wrote:
> Hadriel Kaplan writes:
> 
>  > Openser will send back a CRLF when it gets a CRLF?  Interesting, but
>  > it's proprietary.  There is nothing in SIP to say "send back a CRLF
>  > when you get a CRLF".  This draft is proposing a standardized way to
>  > do that, for both transport types.
> 
> openser will send back back single CRLF later this week, it it receives
> double CRLF over tcp connection.  i have not claimed that this practise
> has been standardized somewhere.  the behavior is simply implemented,
> because several sip UAs, for example, all nokia ones, do send
> double-CRLFs without any negotiation if they are behind nats.  as i have
> told, i don't see any reason to negotiate this behavior at least when UA
> is using tcp.
> 

Double CRLF keepalive as specified in sip-outbound, has been added to
SER v2.1 development version - see the commit log here:

   http://lists.iptel.org/pipermail/serdev/2008-April/012253.html


/alfred

>  > See my other email - it was what I meant - not getting the keep=yes
>  > means the other end doesn't support this draft.
> 
> this is what you say now, not what you said yesterday.  as i said in my
> previous posts, what you say now is fine with me as long as the draft
> clearly says that if UA does not get back keep=yes, then this draft does
> not specify what the UA should do.  this allow current products keep on
> working without this (at least in tcp case) useless negotiation stuff
> that the draft is proposing.
> 
> -- juha
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