11 Mar
2003
11 Mar
'03
2:40 p.m.
Hi Nils,
I am forwarding the OPTIONS message from the UA to my
gateway (cisco 7206 / pa-vxc-2te1+ / sip) and the
gateway is returning what looks like the answer to an
INVITE request. I have a pretty current gateway. The UA
tries over and over sending one after the other OPTIONS
messages. I think it doesn't like the reply from the gateway.
What is weird about the OPTIONS request is that it is
including the established Callid.
I tried grabbing the message in the Ser proxy and sending
a 486 busy.
Thanks for the help. Most UAs do not present any problems,
but this one has been very challenging.
---greg
Hi Greg,
OPTIONS is a request which determines the capabilities of the
destination. A
UA or a proxy should answer with its supported features (see RFC for
details).
I think Ser is currently not able to answer such a request
correctly. But i
have never seen a UA which queried the server. You can send
an OPTIONS
whenever you want, for example to change the connection with
a re-INVITE,
allthough it makes more sence to query the capabilities
before a connection.
But OPTIONS is also used for "traceroute" (see RFC for
details, and sipsak for
an implementation) because it do not establish a call to the UA.
Regards
Nils
On Tuesday 11 March 2003 05:04, Greg Fausak wrote:
What, if anything, should the SER server do with
a
OPTIONS method?
I am receiving this method, from a phone, right after the
phone makes a conversation. That is, the final ACK is
sent from the phone and a call is in progress when the phone decides
to send an OPTIONS message. I thought OPTIONS was a pre-call
sort of thing, not for the current call.
Anyway, I thought I could just capture the OPTIONS method and send
a 486 busy reply with sl_send_reply(). Didn't work.
---greg
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