Some text , as requested.
Christer Holmberg wrote:
...
In section 6:
When a forking proxy receives a non-2xx final response that it
recognizes as terminating one or more early dialogs, if the proxy
does not intend to forward the final response immediately (in
accordance with rules for a forking proxy) and the UAC has indicated
support for the 199 response code, the proxy SHOULD generate and
send
a 199 response upstream for each early dialog terminated on the
downstream side by the non-2xx final response, except for any early
dialog for which the proxy has previously received and forwarded a
199 response.
...
My suggestion:
"When a forking proxy receives a non-2xx final response that it
recognizes as terminating one or more early dialogs, it SHOULD generate
and send a 199 response upstream for each such early dialog satisfying the
following conditions:
-- the proxy does not intend to forward the final response immediately
(in accordance with rules for a forking proxy);
-- the UAC has indicated support for the 199 response code;
-- the proxy has not already received and forwarded a 199 response for
that early dialogue."
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