[asterisk-bugs] [Asterisk 0013712]: Hangups are not recognized when using IAX2 encryption

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=13712 
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Reported By:                justdave
Assigned To:                dvossel
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Project:                    Asterisk
Issue ID:                   13712
Category:                   Channels/chan_iax2
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     assigned
Asterisk Version:           1.4.22 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2008-10-15 17:41 CDT
Last Modified:              2009-02-01 10:24 CST
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Summary:                    Hangups are not recognized when using IAX2
encryption
Description: 
When activating encryption on an IAX trunk link via "encrypt=aes128" the
call performs normally until one of the parties hangs up.  On the Asterisk
server which performed the hangup, it appears to hang up normally.  On the
other Asterisk server, you get a bunch of these in the log:

[Oct 16 06:37:28] NOTICE[3144]: chan_iax2.c:7020 socket_process: Packet
Decrypt Failed!
[Oct 16 06:37:28] NOTICE[3149]: chan_iax2.c:7020 socket_process: Packet
Decrypt Failed!
[Oct 16 06:37:28] NOTICE[3147]: chan_iax2.c:7020 socket_process: Packet
Decrypt Failed!
[Oct 16 06:37:28] NOTICE[3145]: chan_iax2.c:7020 socket_process: Packet
Decrypt Failed!

for about 30 seconds, finally followed by:
[Oct 16 06:37:27] WARNING[3148]: chan_iax2.c:2049 __attempt_transmit: Max
retries exceeded to host 10.250.4.10 on IAX2/mountainview-4 (type = 6,
subclass = 11, ts=10013, seqno=3)
    -- Hungup 'IAX2/mountainview-8'

I also seem to sometimes get the packet decrypt errors when DTMF digits
are transmitted (can't reproduce that one all the time though).

I've tried it with both trunk=yes and trunk=no in the iax.conf on both
ends with no difference.
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 (0099202) stevenla (reporter) - 2009-02-01 10:24
 http://bugs.digium.com/view.php?id=13712#c99202 
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same issue here.

Turn off encryption and the call does not get dropped. 

This occurs when we are experiencing packet loss.

We have incremented the number of max_retry in the code to a large number

but this does not seem to have any affect. 

re-creatable in 1 to 2 min's 

Can test fix 

Issue History 
Date Modified    Username       Field                    Change               
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2009-02-01 10:24 stevenla       Note Added: 0099202                          
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