[asterisk-ss7] libss7 bugs

[Anton]

I can go to IRC when needed. Just tell me when.

Regards,
Anton.

On Monday 10 November 2008 21:09, Matthew Fredrickson wrote:
> Anton wrote:
> > Hi Matthew,
> >
> > One of the ss7 bugs I've discovered on quick tests, and
> > it's critical to normal functionality:
> >
> > short description: ss7 does not release channels on the
> > other side channel reset/failure.
>
> Crap, yes.  I don't know why I still haven't fixed
> that... keep forgetting.  Most of the time it's not a
> problem, because if we receive an individual reset (RSC
> message) we *do* actually drop the call.  It's only on
> group resets that I still haven't added the code to drop
> it.  If you're on AIM, MSN, or anything like that and can
> get in contact with me, I would like to fix this (should
> be just about 5 minutes of coding and a retest from your
> test scenario).
>
> Matthew Fredrickson
> Digium, Inc.
>
> > It means, when there are some amount of calls going
> > through the system, and remote switch just going down
> > abnormally (and than may restore), libss7 asterisk
> > would not release the channels, which was in use.
> >
> > used: asterisk 1.6.0.1
> > libss7 1.0.2
> > dahdi-linux 2.0.0
> > dahdi-tools 2.0.0
> >
> > To reproduce the error:
> >
> > 1st box asterisk libss7
> >
> > 2nd box asterisk chan_ss7 (1.4.21.1)
> >
> > (though I think 2nd box version or switchtype does not
> > matter at all, considering the symptoms)
> >
> > Making 5 looped calls, which after 5 calls end up with
> > Echo() app. to test our voice. Than just stopping box2
> > (chan_ss7) side by "stop now" - and we'll see that on
> > box1 core show channels will have all calls in progress
> > not released. This call wll remain unreleased even when
> > calling party hangup, so making channels stuck forever.
> > This is despite, that libss7 acknowledged the other
> > side by sending reset ask:
> >
> > [Nov  9 22:11:02] DEBUG[10593]: chan_dahdi.c:9494
> > ss7_linkset: Got Reset for CICs 1 to 15: Acknowledging
> > [Nov  9 22:11:02] DEBUG[10593]: chan_dahdi.c:9494
> > ss7_linkset: Got Reset for CICs 17 to 31: Acknowledging
> >
> > *CLI> dahdi show channels group 1
> >    Chan Extension  Context         Language   MOH
> > Interpret        Blocked    State 1            incoming
> >                   default                         In
> > Service 2            incoming                   default
> >                         In Service 3           
> > incoming                   default                     
> >    In Service 4 3772059    incoming                  
> > default                         In Service 5           
> > incoming                   default                     
> >    In Service 6            incoming                  
> > default                         In Service 7           
> > incoming                   default                     
> >    In Service 8            incoming                  
> > default                         In Service 9           
> > incoming                   default                     
> >    In Service 10 3772059    incoming                  
> > default                         In Service 11          
> >  incoming                   default                    
> >     In Service 12            incoming                  
> > default                         In Service 13          
> >  incoming                   default                    
> >     In Service 14            incoming                  
> > default                         In Service 15          
> >  incoming                   default                    
> >     In Service 17            incoming                  
> > default               R         In Service 18          
> >  incoming                   default                    
> >     In Service 19            incoming                  
> > default                         In Service 20          
> >  incoming                   default                    
> >     In Service 21            incoming                  
> > default                         In Service 22          
> >  incoming                   default                    
> >     In Service 23 3772059    incoming                  
> > default                         In Service 24          
> >  incoming                   default                    
> >     In Service 25            incoming                  
> > default                         In Service 26          
> >  incoming                   default                    
> >     In Service 27 3772059    incoming                  
> > default                         In Service 28          
> >  incoming                   default                    
> >     In Service 29 3772059    incoming                  
> > default                         In Service 30          
> >  incoming                   default                    
> >     In Service 31            incoming                  
> > default                         In Service *CLI>
> >
> > while other side is:
> >
> > *CLI> core show channels
> > Channel              Location             State  
> > Application(Data) 0 active channels
> > 0 active calls
> > *CLI> ss7 linestat
> > Linkset: east1
> > CIC   1 Idle
> > CIC   2 Idle
> > CIC   3 Idle
> > CIC   4 Idle
> > CIC   5 Idle
> > CIC   6 Idle
> > CIC   7 Idle
> > CIC   8 Idle
> > CIC   9 Idle
> > CIC  10 Idle
> > CIC  11 Idle
> > CIC  12 Idle
> > CIC  13 Idle
> > CIC  14 Idle
> > CIC  15 Idle
> > CIC  17 Idle
> > CIC  18 Idle
> > CIC  19 Idle
> > CIC  20 Idle
> > CIC  21 Idle
> > CIC  22 Idle
> > CIC  23 Idle
> > CIC  24 Idle
> > CIC  25 Idle
> > CIC  26 Idle
> > CIC  27 Idle
> > CIC  28 Idle
> > CIC  29 Idle
> > CIC  30 Idle
> > CIC  31 Idle
> > *CLI>
> >
> > and we've asknowledged the reset:
> >
> > [Nov  9 22:11:02] DEBUG[10593]: chan_dahdi.c:9494
> > ss7_linkset: Got Reset for CICs 1 to 15: Acknowledging
> > [Nov  9 22:11:02] DEBUG[10593]: chan_dahdi.c:9494
> > ss7_linkset: Got Reset for CICs 17 to 31:
> >
> > There is probably missing channel release on ss7
> > channel reset and asterisk itself.