Thanks for the quick reply, we are using Linux 2.4  with BusyBox.

compiler is gcc v2.9.5.3  run-time library = uClibc 0.9.19

Sofia stack version is 1.12.10.






Francesco Lamonica <alienpeng...@gmail.com>
10/02/2009 12:17 AM
 
        To:     Robert Han <robert...@vtech.ca>
        cc:     sofia-sip-devel@lists.sourceforge.net
        Subject:        Re: [Sofia-sip-devel] Fw: Changing IP address.


Hello Robert, 
may i ask what platform and sofia version are use using? I am facing the 
same issue but i dont'even get the nua_r_shutdown message...

thanks

On Thu, Oct 1, 2009 at 11:28 PM, Robert Han <robert...@vtech.ca> wrote:

Hi, 

I just want to raise the issue that we asked you earlier back in July 31 
(see below). 

You said that if we shutdown the sofia stack, and if there are outstanding 
sip sessions (for example 4 active sessions), we do not need to nua_bye() 
or even nua_handle_destroy() before invoking nua_shutdown(). 

according to your reply, the nua stack is guaranteed to terminate 
outstanding nua operations, and then publish nua_i_terminate as the final 
event with a operation handle, so that we can destroy that handle. 

that never happened. 

our logs below an IP address change, where we had to recycle the Sofia sip 
stack: 


our link status monitor reports an IP address change, so we proceed to 
recycle our Sofia stack: 

-NTC-[20021020:112634.600]|  104||cc        ||sip.fe   
 |DevCoordStatusChange: SIP: NETWORK UP 
-NTC-[20021020:112634.600]|  104||cc        ||sip.fe   
 |DevCoordStatusChange: Network Link Recycled ==> possible new IP address 
change 
-NTC-[20021020:112634.600]|  104||cc        ||sip.fe   
 |DevCoordStatusChange: IP address changed from 192.168.0.52 to 
192.168.0.77. 
-NTC-[20021020:112634.610]|  104||cc        ||sip.fe   
 |DevCoordStatusChange: Need to recycle Sophia Stack ===> shutting down 
the Sophia SIP stack... 

                        IsSofiaStackShuttingDown = TRUE; 

                        VT_NOTICE("Shutting down the Sofia SIP Stack..."); 

                        nua_shutdown(PortPtr->sofiaStackPtr);   

===> now i expect Sofia stack to terminate the nua operation for each 
outstanding sip session with nua_i_terminated before receiving 
nua_r_shutdown 
completion status , but we don't get it hence we don't destroy the nua 
handle. 


 DBG [20021020:112635.680]|  168||SIP Event Handler||sip.fe   
 |EventCallback: Received an event = ['nua_r_shutdown'] status = [100 
,'Shutdown started'] on port [5060]. Handle = [(nil)], HMagic = (nil). 
-NTC-[20021020:112635.680]|  168||SIP Event Handler||sip.fe   
 |EventCallback: Sophia SIP stack shutdown started successfully. 
 DBG [20021020:112635.810]|  168||SIP Event Handler||sip.fe   
 |EventCallback: Received an event = ['nua_r_shutdown'] status = [200 
,'Shutdown successful'] on port [5060]. Handle = [(nil)], HMagic = (nil). 
-NTC-[20021020:112635.810]|  168||SIP Event Handler||sip.fe   
 |EventCallback: Sophia SIP stack shutdown completed successfully. 
-NTC-[20021020:112635.820]|  168||SIP Event Handler||sip.fe   
 |EventCallback: ---> StartSipStack() 
nta_agent: received garbage from udp/192.168.0.77:5060/sip 
nta_agent: received garbage from udp/127.0.0.1:5060/sip 
-NTC-[20021020:112635.850]|  168||SIP Event Handler||sip.fe   
 |EventCallback: <--- StartSipStack() 
 DBG [20021020:112635.850]|  168||SIP Event Handler||sip.fe   
 |EventCallback: Received an event = ['nua_r_set_params'] status = [200 
,'OK'] on port [5060]. Handle = [(nil)], HMagic = (nil). 
 DBG [20021020:112635.850]|  168||SIP Event Handler||sip.fe   
 |EventCallback: Discarding event nua_r_set_params.  Handler not 
implemented. 



because we don't recieve the nau_i_terminate, we have a *stale* handle on 
our side, where we did not destroy it, but our client-side binding Session 
context object is already deleted. 

would that be a bug? is the Sofia stack suppose to behave as described 
above??   

thanks, 
Robert Han, Senior Software Engineer 
VTech Technologies Canada, Ltd. 


----- Forwarded by Robert Han/ENG/VTNCAN/VTECH on 10/01/2009 02:01 PM 
----- 

Jen Chitty 
07/31/2009 12:01 PM 
        
        To:        Robert Han/ENG/VTNCAN/vt...@vtech 
        cc:         
        Subject:        Fw: [Sofia-sip-devel] Changing IP address.



----- Forwarded by Jen Chitty/ENG/VTNCAN/VTECH on 07/31/2009 11:57 AM 
----- 

Michael Jerris <m...@jerris.com> 
07/31/2009 11:47 AM 
        
        To:        Jen Chitty <jenchi...@vtech.ca> 
        cc:        sofia-sip-devel <sofia-sip-devel@lists.sourceforge.net> 

        Subject:        Re: [Sofia-sip-devel] Changing IP address.




On Jul 31, 2009, at 2:23 PM, Jen Chitty wrote: 


Hi, 

I'm wondering if there's a way to change the IPv4 address that the Sofia 
stack binds to without having to shutdown and restart the stack.  We're 
using the NUA. 

Nope, but would be nice. 


Right now, if our device's IPv4 address changes we shutdown the Sofia 
stack and start it up again.  This seems to mostly work, but we are 
experiencing some race conditions with callbacks from the Sofia event loop 
thread (running su_root_run) and our application thread, especially with 
respect to handle destruction.  We were hoping that we could just leave 
the Sofia stack running and tell it to change its IPv4 address. 

Another question that I'd like an answer to is this:  When shutting down 
the Sofia stack, are we guaranteed to receive a nua_i_terminated event for 
every session that hasn't yet been terminated? 

That is the intention, if your not, its a bug. 


Thanks very much. 

--JT 

J. T. Chitty, Chief Software Engineer 
VTech Technologies Canada, Ltd. 

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