[asterisk-bugs] [JIRA] (ASTERISK-26747) Ambiguity in PJSIP use_avpf and force_avp

[Rusty Newton (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-26747?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rusty Newton updated ASTERISK-26747:
------------------------------------

    Severity: Minor  (was: Major)

> Ambiguity in PJSIP use_avpf and force_avp
> -----------------------------------------
>
>                 Key: ASTERISK-26747
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26747
>             Project: Asterisk
>          Issue Type: Improvement
>      Security Level: None
>    Affects Versions: 13.13.1
>            Reporter: JoshE
>            Severity: Minor
>
> Placeholder issue and starting a discussion for some concerns about the way that use_avpf and force_avp (undocumented, though used in pjsip) are implemented in res_pjsip in Asterisk 13+.
> use_avpf right now forces the AVPF on all incoming invites. We would prefer the ability, as was closer to the behavior in chan_sip to allow it if present, but not require it.
> Similar to some issues with encryption, we have a need to "optimistically" accept avpf on incoming invites. Ideally, this would let us configure something like:
> use_avpf=yes
> force_avpf=no
> And allow an invite with RTP/AVP to pass through. Right now, this returns an invalid transport.
> Might be a question for @jcolp, but would a change to add this additional behavior - a knob for force_avpf - be acceptable?
> Secondarily, it may be beneficial to document the force_avp option, as it's currently undocumented in the .sample file.



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