[Standards] groupchat and error message routing

Jiří Zárevúcký zarevucky.jiri at gmail.com
Wed Feb 11 18:27:03 UTC 2009

I'm not entirely sure, but I think that nobody is ever supposed to
send an error message to a bare JID. Errors are sent in a response to
an invalid stanza, which always originates from a resource. As for the
"groupchat", I would suggest taking a look at the relevant XEP.

2009/2/11 Waqas Hussain <waqas20 at gmail.com>:
> Hi,
> When messages of type 'groupchat' and 'error' are sent to a
> non-existing resource, they are routed to the set of highest priority
> available resources. IMHO this behaviour in counter-intuitive. I don't
> see why an unintended resource would want a groupchat or error
> message, or how it's supposed to deal with it. Also note that the 'to'
> attribute gets overwritten, so the recieving resource doesn't even
> know to which resource the messages were originally directed. Could
> someone describe some cases where this is useful?
> Relevent rfc3921bis-07 sections:
> 8.2.2.  No Resource Matches
> <http://xmpp.org/internet-drafts/draft-saintandre-rfc3921bis-07.html#rules-fulljid-nomatch>
> "For a message stanza, the server SHOULD treat the stanza as if it
> were addressed to <user at domain> as described in the next section (but
> without modifying the value of the 'to' attribute)."
>  Message
> <http://xmpp.org/internet-drafts/draft-saintandre-rfc3921bis-07.html#rules-barejid-resource-message>
> "For a message stanza of type "chat", "error", "groupchat", or
> "normal", the server SHOULD deliver the stanza to the highest-priority
> available resource."
> --
> Waqas Hussain

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