[asterisk-bugs] [JIRA] (ASTERISK-26616) T38 calls not being hung up correctly

[Morten Tryfoss (JIRA)]

Morten Tryfoss created ASTERISK-26616:
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             Summary: T38 calls not being hung up correctly
                 Key: ASTERISK-26616
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26616
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Channels/chan_sip/General
    Affects Versions: 13.8.0
            Reporter: Morten Tryfoss
         Attachments: debuglog.txt

We've got this scenario:

There's a bridged call which negotiates T38. 
After fax is sent the caller sends BYE. 
Then Asterisk tries a reINVITE to the callee (back to normal audio). 
This is rejected by a 488 not accepted here.
No BYE is sent to the callee.
The call stays up for several hours until dropped by the callee.

I found this in the debug log at BYE:
[Nov 21 16:35:14] DEBUG[15411][C-001906b6] chan_sip.c: Hangup call SIP/sipic2-00320075 (This is the callee-channel), SIP callid 754576b53f450b526e26caf705dbbf57 at 158.58.152.21:5060
[Nov 21 16:35:14] DEBUG[18031][C-001906b6] chan_sip.c: (Provisional) Stopping retransmission (but retaining packet) on '754576b53f450b526e26caf705dbbf57 at 158.58.152.21:5060' Request 104: Found

It seems like Asterisk is trying to CANCEL the call instead of BYE? Invitestate is incorrect  or channelstate is not up after the failed reINVITE, which in turn sets needcancel to TRUE?

It seems to be easy to reproduce, but it takes some time for me to identify the long running calls since they're not visible in Asterisk anymore.

The issue could also be related to ASTERISK-26609.




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