[asterisk-dev] [Code Review] IAX2 "Ghost" channels

[Tim Panton]

On 15 May 2009, at 21:49, David Vossel wrote:

>
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> http://reviewboard.digium.com/r/246/
> -----------------------------------------------------------
>
> (Updated 2009-05-15 15:49:03.921398)
>
>
> Review request for Asterisk Developers.
>
>
> Changes
> -------
>
> Russell's Tweaks
>
>
> Summary
> -------
>
> There is a bug tracker issue where people are reporting "Ghost"  
> channels in their 'iax2 show channels' output.  The confusion is  
> caused by channels being listed as "(NONE)" with format "unknown".   
> These are not channels of coarse.  They are usually just pending  
> registration or poke requests, but it is confusing output.  To help  
> make sense of this I have added two columns to 'iax2 show  
> channels'.  One shows the first message which started the  
> transaction, and the second shows the last message sent by either  
> side of the call.  This helps diagnose why the entry exists and why  
> it may not go away.
>
> For example: in the 'iax2 show channels' output below the  
> registration happening in the second entry is to a device that has  
> been removed from the network.  This entry will exist in the show  
> channels output for quite sometime as Asterisk attempts to register  
> with the device.  Being able to view that this "Channel" is in fact  
> a registration, and that the last message is a REGREQ which has not  
> received an ACK, makes this entry much more obvious.
>
> This is technically a new feature, but due to the amount of  
> confusion this has caused I purpose placing it in the 1.4 and 1.6.x  
> branches as well.  This may or may not resolve the issue it is  
> associated with, but it will help weed out those having an actual  
> issue with excess "Ghost" channels from those seeing something  
> normal like a pending registration.  It will also help diagnose the  
> cause of the excessive "Ghost" channels some users are reporting.
>
> --------------EXAMPLE OUTPUT-------------
>
> *CLI> iax2 show channels
> Channel               Peer             Username    ID (Lo/Rem)  Seq  
> (Tx/Rx)  Lag      Jitter  JitBuf  Format  Start Message  Last Message
> IAX2/iaxy-15318       10.24.20.218     iaxy        12718/10329   
> 00002/00002  00000ms  0000ms  0040ms  unknow  NEW            ACK
> (None)                10.24.16.238     (None)      15109/00000   
> 00001/00000  00000ms  0000ms  0040ms  unknow  REGREQ         REGREQ
>
>
> *CLI> iax2 show netstats
>                          -------- LOCAL ---------------------   
> -------- REMOTE --------------------
> Channel               RTT  Jit  Del  Lost   %  Drop  OOO  Kpkts   
> Jit  Del  Lost   %  Drop  OOO  Kpkts Start Message
> IAX2/iaxy-15318      1000    0   40     0   0     0    0      0     
> 0    0     0   0     0    0      0 NEW
> (None)               1000    0   40     0   0     0    0      0     
> 0    0     0   0     0    0      0 REGREQ
> 2 active IAX channels


Whilst you are changing that - any chance you can display the  
'encryption' status flag too?

Tim.


Tim Panton - Web/VoIP consultant and implementor
www.westhawk.co.uk



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