6 Mar
2018
6 Mar
'18
6:24 p.m.
Hi people,
I am trying to search for the RFC behavior in case of 180/200 to tag
mismatch of an INVITE. From my readings so far, I'm not 100% convinced of
the correct behavior.
However, there may be a scenario, where this might be plausible:
1. parallel forked two calls
2. 180 ringing comes for first one, but not for second one(various reasons)
3. 200 ok comes for second one
Any opinions about this? Do you have some references that will make this
100% clear?
Thank you,
Stefan
7 Mar
7 Mar
9:43 a.m.
Hello,
On 06.03.18 17:24, Mititelu Stefan wrote:
Hi people,
I am trying to search for the RFC behavior in case of 180/200 to tag
mismatch of an INVITE. From my readings so far, I'm not 100% convinced
of the correct behavior.
However, there may be a scenario, where this might be plausible:
1. parallel forked two calls
2. 180 ringing comes for first one, but not for second one(various
reasons)
3. 200 ok comes for second one
Any opinions about this? Do you have some references that will make
this 100% clear?
the UA has to take the tag from 200ok. Provisional responses are not
mandatory, one can just send directly 200ok. Different tags can come due
to serial or parallel forking, the the UA must be prepared to handle
branches of its call until the 200ok is received and then use it to
complete the dialog.
Cheers,
Daniel
--
Daniel-Constantin Mierla
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Kamailio Advanced Training - March 5-7, 2018, Berlin - www.asipto.com
Kamailio World Conference - May 14-16, 2018 - www.kamailioworld.com
12:01 p.m.
Hi Daniel,
Thank you for making this clear!
Also I have just found [1] (second paragraph) that enforces what you said.
---
Stefan
[1] https://tools.ietf.org/html/rfc3261#section-13.2.2.4
On Wed, Mar 7, 2018 at 9:43 AM, Daniel-Constantin Mierla <miconda(a)gmail.com>
wrote:
Hello,
On 06.03.18 17:24, Mititelu Stefan wrote:
Hi people,
I am trying to search for the RFC behavior in case of 180/200 to tag
mismatch of an INVITE. From my readings so far, I'm not 100% convinced
of the correct behavior.
However, there may be a scenario, where this might be plausible:
1. parallel forked two calls
2. 180 ringing comes for first one, but not for second one(various
reasons)
3. 200 ok comes for second one
Any opinions about this? Do you have some references that will make
this 100% clear?
the UA has to take the tag from 200ok. Provisional responses are not
mandatory, one can just send directly 200ok. Different tags can come due
to serial or parallel forking, the the UA must be prepared to handle
branches of its call until the 200ok is received and then use it to
complete the dialog.
Cheers,
Daniel
--
Daniel-Constantin Mierla
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Kamailio Advanced Training - March 5-7, 2018, Berlin - www.asipto.com
Kamailio World Conference - May 14-16, 2018 - www.kamailioworld.com
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2 comments
2 participants
participants (2)
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Daniel-Constantin Mierla -
Mititelu Stefan