28 Dec
2011
28 Dec
'11
2:24 p.m.
2011/12/28 Juha Heinanen <jh(a)tutpro.com>om>:
Iñaki Baz Castillo writes:
If the Via header is invalid, then the Proxy/UAS *cannot* reply to the
request, or not in every cases. Theorically the Proxy/UAS replies to a
request based on the information in Via header.
--
Iñaki Baz Castillo
<ibc(a)aliax.net>
Anyhow, it could occur that the request contains
a valid SIP header
(token: value) but with an invalid grammar (i.e. a P-Asserted-Identity
with a wrong URI value). The proxy could not check it (because in some
configuration it just ignores such a header) but later the UAS/GW
could inspect it and drop the request since the header is invalid (and
it could reply a 400 or just drop the request).
where in rfc3261 is it stated that UAS is allowed to drop a request that
it could respond to (i.e., the request has valid via header).