VoIP Mailing List Archives

[johnd at defyne.org]

Hi,

I am trying to use FS to make outgoing SIP calls. I have a number of
gateways that can make the call. However, if one of them is down or has
some other problem then I would like to detect that quickly.

I intended to use the provisional '100 Trying' message for this... if it
hasn't been received in a couple of seconds then go on and try the next
gateway.

But I can't find a flag/event/state which corresponds to receipt of this
message. Can anyone tell me where I should be looking? I put a debug print
in sofia_event_callback for every event but there doesn't seem to be one
fired for this condition.

Thanks in advance.

{P^/
John

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[anthony.minessale at g...]

That 100 trying is handled deep in the sip stack.
The author of sofia said it would be a big job to bring that up to the even callback.
Someone may be able to persuade him to allow you to pass a global timeout waiting for 100
or something but no solution exists atm


On Tue, Apr 21, 2009 at 3:32 AM, John Dalgliesh <johnd@defyne.org (johnd@defyne.org)> wrote:

[johnd at defyne.org]

Hi Anthony,

Thanks for the reply!

While waiting for my question to appear on the list yesterday (6H delay at
yoda.ostag.org... is first post moderated?) I went deep into the SIP stack
and figured out the solution: You just have to give NTATAG_PASS_100(1) as
one of the tags for nua_create. Then you get a sofia event for it. I guess
the author has made it easier since your last discussion.

I have changed my mod_sofia to do this. I also added a channel flag which
is set if any response has been received from the remote end (be it 100,
18X, 2XX, etc.). The flag is now tested by switch_ivr_originate to
time-out a call quickly.

Would you/anyone be interested in a patch to do this? If so please let me
know the procedure for posting patches etc.

{P^/

On Tue, 21 Apr 2009 at 10:03 -0500, Anthony Minessale wrote:

[brian at freeswitch.org]

Patches should be posted to http://jira.freeswitch.org,

Thanks for digging in.


/b

On Apr 21, 2009, at 10:22 PM, John Dalgliesh wrote:

[anthony.minessale at g...]

I guess maybe he added it as a result of our last conversation and never told me.

yes, if you do it elegantly we can add that patch.
submit what you have to jira in we can do code review.


On Tue, Apr 21, 2009 at 10:38 PM, Brian West <brian@freeswitch.org (brian@freeswitch.org)> wrote: