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Re: [Linphone-developers] liblinphone proxy and Linphone-iphone timer pa
Re: [Linphone-developers] liblinphone proxy and Linphone-iphone timer patches
Wed, 24 Apr 2013 17:08:54 -0400
Dang. It looks like my attachment may have been stripped because it didn't have
a .txt extension. But that's OK because I accidentally a bit of test code in
the first one. Here's an updated copy with a txt extension for the mailer
Description: Text document
On Apr 24, 2013, at 4:39 PM, address@hidden wrote:
> Date: Wed, 24 Apr 2013 16:38:53 -0400
> From: Eli Burke <address@hidden>
> Subject: [Linphone-developers] liblinphone proxy and Linphone-iphone
> timer patches
> Message-ID: <address@hidden>
> A function in liblinphone called linphone_proxy_config_edit() is responsible
> for UNREGISTERing a user when account settings change. This entails sending a
> brand new REGISTRATION to the remote server and setting the expire time to 0.
> In situations where the user's credentials are invalid, an unnecessary
> UNREGISTER is sent and can result in the display of an invalid error message.
> (for example, if the user enters a bad password and then corrects it). I
> modified the function so that it would not unregister the user when
> Registration had failed.
> Making this change in liblinphone revealed a race condition in
> Linphone-iPhone. It occurs when the user's changed account settings are
> synchronized. A call to linphone_core_set_sip_transports() ultimately results
> in a call to eXosip_quit() / eXosip_init() which tears down the network
> connection and re-initializes it. Meanwhile, the LinphoneManager object is
> periodically calling a function called linphone_core_iterate(), which
> eventually calls down to eXosip_event_wait().
> If a context switch occurs at the wrong time, the call to eXosip_quit will
> free up allocated memory, and then eXosip_event_wait will try to use
> eXosip.j_socketctl_event (now uninitialized) and Linphone goes boom. My fix
> was to add a methods to stop and start the iterate timer, and to turn it off
> when the account settings are being synchronized.
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