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.
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