-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 2/28/12 11:28 PM, Gunnar Hellström wrote: > Returning to the initial question of this thread: Is there a common > way to indicate session start and session end. > > Peter Saint-Andre skrev 2012-02-29 04:20: >> Yes, but that doesn't necessarily mean you need an explicit >> negotiation protocol. > Right. The first need I thought about can in fact be reduced to a > text session indicator, not even linked to RTT support. > > I will take a scenario to make the need clear. > > Assume that there is a SIP based stock exchange service, sending > stock exchange information in text in sessions. It continues as > long as a terminal is connected. A terminal indicates by a BYE that > it leaves the session, so that the server can release the > resources. During the session, the text information may be provided > through RFC 4103 or RFC 3428 or RFC 4975. (RFC 4103 makes most > sense of course for the RTT example, but let us look at it in > general). > > Also assume that you want to make this service available to XMPP > users through a gateway. Setting up a chat session to the gateway > causes it to set up a SIP session with the stock exchange server. > Messages or real-time text is flowing from the stock exchange > server to the XMPP client. Then, the XMPP user want to leave the > session. What does the user do and what does the gateway use as an > indication that the session is over and it can take down the > session towards the server?
I really think that if you want to gateway between SIP and XMPP, you want to use Jingle. Such gatewaying was one of the core considerations for Jingle. Now, I haven't looked at RFC 4103 in quite a while, but we can certainly write a spec that defines how to translate between XEP-0301 and RFC 4103 (e.g., how to translate the SDP). Personally I don't think we absolutely need a way to complete a formal negotiation over XMPP itself, because I tend to think that just sending a chat message is a much more natural interaction, but *if* we think we need such a negotiation method, we should just use Jingle. Peter - -- Peter Saint-Andre https://stpeter.im/ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.8 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk9OcRQACgkQNL8k5A2w/vzgqwCgiBcvV337uC0aDPVQ0zJ2zY+x dGsAoKhCEcelqsbgJFE5fF1trjKBFkPU =NhyO -----END PGP SIGNATURE-----
