[asterisk-bugs] [JIRA] (ASTERISK-23290) chan_sip: ast_bridge_transfer_blind causes channel to be hung up immediately, leading to BYE request being sent before NOTIFY

[Matt Jordan (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-23290?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matt Jordan updated ASTERISK-23290:
-----------------------------------

    Reviewboard Link: https://reviewboard.asterisk.org/r/3214/
    
> chan_sip: ast_bridge_transfer_blind causes channel to be hung up immediately, leading to BYE request being sent before NOTIFY
> -----------------------------------------------------------------------------------------------------------------------------
>
>                 Key: ASTERISK-23290
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-23290
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_sip/Transfers
>    Affects Versions: 12.0.0
>            Reporter: Matt Jordan
>         Attachments: full.txt.1, messages.txt
>
>
> When {{chan_sip}} calls {{ast_bridge_transfer_blind}}, the calling thread will wait until it knows whether or not the transfer has completed before sending a NOTIFY (200) to the transferor.
> Unfortunately, the bridging layer is rather quick at ejecting the transferor from the bridge. This results in the transferor being hung up rather quickly, causing a BYE request to go out before the NOTIFY.
> We then end up sending the NOTIFY request after the BYE. This causes the {{blind-transfer-accountcode}} test to then fail.
> We need to either:
> # Defer sending the BYE until after the NOTIFY request
> # Don't send the NOTIFY if the BYE was sent
> Logs are attached. The following are the key lines in the log file showing the error:
> * SIP/test1-00000000 is booted from the bridge:
> {noformat}
> [Feb 11 15:41:06] VERBOSE[10511][C-00000000] bridge_channel.c:     -- Channel SIP/test1-00000000 left 'native_rtp' basic-bridge <e95fc3f0-b3d4-4233-8f06-b6ff81691a5e>
> {noformat}
> * {{BYE}} is transmitted to {{test1}}:
> {noformat}
> [Feb 11 15:41:06] VERBOSE[10511][C-00000000] chan_sip.c: Reliably Transmitting (no NAT) to 127.0.0.4:5060:
> ÿBYE sip:test1 at 127.0.0.4:5060 SIP/2.0
> {noformat}
> * {{NOTIFY}} is transmitted to {{test1}}:
> {noformat}
> [Feb 11 15:41:06] VERBOSE[10480][C-00000000] chan_sip.c: Reliably Transmitting (no NAT) to 127.0.0.4:5060:
> ÿNOTIFY sip:test1 at 127.0.0.4:5060 SIP/2.0
> {noformat}

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