[SR-Users] CSeq values in dialog OPTIONS keepalives

Alex Balashov abalashov at evaristesys.com
Thu Jan 2 22:00:18 CET 2020

On Thu, Jan 02, 2020 at 09:26:23PM +0100, Daniel-Constantin Mierla wrote:

> There can be also another (simpler, half-way) variant where the
> OPTIONS are sent out of the dialog just to detect when the caller or
> callee is disconnected () from the network, which is the usual case
> that can happen.  Sending the OPTIONS within the dialog is for
> additional detection of the case when the call was cut somehow event
> the end point it is still on the net (e.g., buggy UA).

Hi Daniel, thanks for your response.

What is the simplest thing to do here for a time-economic point of view?
Might it be to add a modparam which indicates whether requests are sent
in-dialog or out-of-dialog? Or does the instrumentation for that require
a lot of conditional logic at various points due to the amount of state
kept in the in-dialog case?


-- Alex

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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