[asterisk-bugs] [JIRA] Created: (ASTERISK-20144) Peer MWI subscriptions erroneously removed when another SIP dialog is destroyed

[Rusty Newton (JIRA)]

Peer MWI subscriptions erroneously removed when another SIP dialog is destroyed
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                 Key: ASTERISK-20144
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-20144
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Channels/chan_sip/General
    Affects Versions: 1.8.14.0
         Environment: Asterisk 1.8.14.0
            Reporter: Misha Vodsedalek


A peer MWI subscription gets cancelled when another SIP dialog (unrelated to the MWI subscription) gets destroyed. The MWI light on phones that rely only on subscription messages stops working (e.g., Nortel 1100 and 1200 series phones with SIP firmware).

The problem is caused by an incorrect check if the dialog that is being destroyed is related to the MWI subscription.

The same issue exists in Asterisk 1.6 as well as Asterisk 10.

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