On Fri, Sep 2, 2011 at 11:07 AM, Dmytro Bogovych
<dmytro.bogovych@xxxxxxxxx> wrote:
Greetings.
I work on iOS VoIP resiprocate based application.
In order to support background mode let me ask a few question.
The first one is
- what is the interval for registration refreshing? Half of registration time? Quarter of registration time? Can I change it?
[Scott] Resip uses the minimum of the Expiration interval less 5 seconds, and nine tenths of the expiration internal for automatic registration refreshes (see: Helper.hxx:aBitSmallerThan). You can manually invoke a refresh before this time by calling ClientRegistration::requestRefresh.
iOS provides quants of time to refresh application state each 600 seconds - so I use TCP transport to avoid UDP/NAT/lifetime issues.
But would be great if application refresh its registration in these quants. It is a reason for my first question.
The second question - what is the lifetime for TCP connection used for registration?
I saw GC capability in source code but it is disabled by default (this is good for me).
I pass the connection's socket to iOS to track the data on it and bring the application if new data (incoming call/message) are available.
[Scott] By default resiprocate will not close any TCP connections, until it runs of socket FD's. When it runs out of socket FD's, it will close the oldest/least used connection.
Thank you!
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