A 180 is pretty much the same as a 100.
As you did the "to-tag" should be added. Additionnaly, you
may need to copy the record-route and add a Contact header.
-but that shouldn't impact sending the 180-
Beside your own debugging (as you stated in the state machine),
you can also check logs and see if there is an error somewhere.
Regards
Aymeric
2014-10-02 22:43 GMT+02:00 Roger Schreiter <address@hidden>:
Hello,
I'm still learning how to use osip, and therefore I'm implementing
a simple gateway: One SIP call is coming in and is forwarded
to another host.
No I'm facing a behaviour of libosip, which I do not understand.
So far ok is:
SIP call is coming in and is detected.
Transition is created.
100 Trying is sent back using:
evt = osip_new_outgoing_sipmessage(response);
osip_transaction_add_event(tr, evt);
New INVITE to other host is created and sent to other host.
100 Trying from other host is received.
180 Ringing from other host is received.
Then I create a response 180 Ringing to the first host, exactly
as the first 100 Trying. Just the To-tag is also added.
Then I try to send as before:
evt = osip_new_outgoing_sipmessage(response);
osip_transaction_add_event(tr, evt);
where tr is the transaction from the incoming INVITE.
None of those calls is returning an error.
However, my cb_snd_message is not called by libosip.
Now, I wonder, why the 100 Trying was sent, but not the
180 Ringing. Besides of the cause code and the To-tag, I cannot
see any difference between my ways to send those responses.
Has anyone an idea, how I could figure out, what is going wrong?
Are there any further debugging means inside the transistion state
machine?
Regards,
Roger.
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