[Bug 34975] porter should have a fallback for no IQ handlers

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=34975

--- Comment #1 from Will Thompson <will.thompson at collabora.co.uk> 2011-03-10 02:20:44 PST ---
I began implementing this in Wocky, but hit weird test failures. The WIP patch
is at
<http://git.collabora.co.uk/?p=user/wjt/wocky.git;a=commitdiff;h=refs/heads/reply-to-unhandled-iqs>.
>From the commit message:

XMPP Core requires that we reply to all IQs we receive. If no handler
claims responsibility for an incoming IQ, the porter should send back a
<service-unavailable/> error. (Currently, Gabble does this.)

For reasons I don't pretend to fully understand, this currently doesn't
work! The test this patch adds fails with:

    ERROR:../../tests/wocky-test-helper.c:233:wait_sched_close_cb: assertion
    failed (error == (wocky-xmpp-connection-error, 1)): Another receive
    operation is pending (g-io-error-quark, 20)

And, worringly, /xmpp-porter/handler-stanza fails with an equally
inexplicable assertion:

    ERROR:../../tests/wocky-test-helper.c:230:wait_sched_close_cb: assertion
    failed: (s == NULL)

I think this may be related to bug 34308 which I found when writing a simple
send-a-message example program…

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