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

[Asterisk Team (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-26747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=234842#comment-234842 ] 

Asterisk Team commented on ASTERISK-26747:
------------------------------------------

Thanks for creating a report! The issue has entered the triage process. That means the issue will wait in this status until a Bug Marshal has an opportunity to review the issue. Once the issue has been reviewed you will receive comments regarding the next steps towards resolution.

A good first step is for you to review the [Asterisk Issue Guidelines|https://wiki.asterisk.org/wiki/display/AST/Asterisk+Issue+Guidelines] if you haven't already. The guidelines detail what is expected from an Asterisk issue report.

Then, if you are submitting a patch, please review the [Patch Contribution Process|https://wiki.asterisk.org/wiki/display/AST/Patch+Contribution+Process].

> Ambiguity in PJSIP use_avpf and force_avp
> -----------------------------------------
>
>                 Key: ASTERISK-26747
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26747
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>    Affects Versions: 13.13.1
>            Reporter: JoshE
>
> 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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