[asterisk-bugs] [JIRA] (ASTERISK-28634) Invite loop within PJSIP

[Joeran Vinzens (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-28634?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=249708#comment-249708 ] 

Joeran Vinzens commented on ASTERISK-28634:
-------------------------------------------

We tried to reprocude the scenario using sipp but we failed. I will attach my scenario files. We used the basix PBX configuration from asterisk make-config to have a clean setup.

from SIP it looks exactly the same just that we have some Kamailio LB in our production environment.

the sipp commands we used are:
outgoing call:
```sipp 127.0.0.1 -sf "sipp_outgoing.xml" -inf "sip-credentials.csv" -m 1 -s 1107 -p 5080```

Incoming call and a register beforehand:
```
sipp 127.0.0.1 -sf sipp_register.xml -inf "sip-credentials.csv" -m 1 -p 5070
sipp 127.0.0.1 -sf sipp_accept.xml -inf "sip-credentials.csv" -m 1 -p 5070
```

> Invite loop within PJSIP
> ------------------------
>
>                 Key: ASTERISK-28634
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-28634
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Resources/res_pjsip
>    Affects Versions: 17.0.0
>         Environment: Asterisk 17.0.0 with bundled PJSIP on Debian Buster
>            Reporter: Joeran Vinzens
>            Assignee: Unassigned
>         Attachments: asterisk.conf, asterisk_invite_loop_other_side.pcap, invite_loop_small.pcap, pjsip.conf, rtp.conf, Screenshot from 2019-11-26 10-19-59.png, sipp_scenario.tar.xz
>
>
> Fom time to time we can see traffic increase on out Asterisk Systems. After some debugging we see the Asterisk send kind of an Invite loop over and over. Since there is no way to deny re-invites in PJSIP there is no way out of it. From asterisk perspective it sends these re-invites as fast as it can which result in an increase of 3MBit/s of signalling traffic from this maschine. So far we do not know how to reproduce the issue but we captured the scenario from our production system. (trace attached) the Asterisk log itself just tells us the Invite is going out but nothing further. There was no trigger on the other call-leg.



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