25 Jan
2020
25 Jan
'20
2:41 a.m.
Hi,
How is the determination of CSeq for dialog-spoofed BYEs made?
Thanks,
-- Alex
On Fri, Jan 03, 2020 at 04:16:51PM +0100, Daniel-Constantin Mierla wrote:
Hello,
when the call is established, there is one request (the INVITE) from caller
to callee. Then the ACK also from caller to callee. But there is no request
from callee to caller at that moment. Each side is using its own cseq
value, the callee doesn't have to use the latest cseq from caller plus one
when it sends a request (like a re-INVITE or the BYE). In practice the cseq
0 is not usually used by an UA, so that's why the keepalive for that
direction is using it.
Cheers,
Daniel
On Thu, Jan 2, 2020 at 10:07 PM Alex Balashov <abalashov(a)evaristesys.com>
wrote:
On Thu, Jan 02, 2020 at 09:26:23PM +0100,
Daniel-Constantin Mierla wrote:
--
Daniel-Constantin Mierla - https://www.asipto.com
https://twitter.com/miconda - https://www.linkedin.com/in/miconda
Kamailio Advanced Training - https://www.asipto.com/u/kat the cseq 0 is because in that direction was no
request sent
end-to-end.
Also, sorry, but I didn't quite understand this.
--
Alex Balashov | Principal | Evariste Systems LLC
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
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--
Alex Balashov | Principal | Evariste Systems LLC
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Web: http://www.evaristesys.com/, http://www.csrpswitch.com/