[asterisk-bugs] [JIRA] (ASTERISK-29955) SIP route header is missing on UPDATE

[Mark Petersen (JIRA)]

Mark Petersen created ASTERISK-29955:
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             Summary: SIP route header is missing on UPDATE
                 Key: ASTERISK-29955
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-29955
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Channels/chan_sip/General, Channels/chan_sip/Transfers
    Affects Versions: 18.10.1, 16.24.1
            Reporter: Mark Petersen


if Asterisk need to send an UPDATE before answer on a channel that uses Record-Route: it will not include a Route header

how to reproduce:
A call B
B put A on HOLD
B call C
C send 180 Ringing with a Record-Route header
B refer A to C (while C is still ringing)

note only newer phone will send the refer with the unanswered channel of C

bug introduced with ASTERISK-24628
that is trying to prevent set_destination from being set,
but inadvertently also prevents add_route from being set



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