[asterisk-dev] Possible bug – missing mandatory field Max-Forwards

[Mark Michelson]

Thanks for pointing this out.

I have commented on the issue with instructions with what I think is going
wrong here.

On Thu, Feb 19, 2015 at 6:33 PM, Anatoli <me at anatoli.ws> wrote:

> Hi All,
>
> I was evaluating the latest Asterisk (13.2.0) with the latest PJSIP (2.3)
> and found a critical problem (critical if some of the endpoints enforce
> compliance with the SIP RFC).
>
> I had a discussion on pjsip mailing list about this (
> http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/2015-February/018120.html)
> where the consensus was that there is a bug in res_pjsip code that manages
> SIP headers. The problem consists in that first the code in res_pjsip.c
> removes Max-Forwards header from the request generated by PJSIP library,
> but it doesn't add it later, so Asterisk sends INVITE, ACK, BYE, etc.
> messages without this mandatory header and RFC enforcing clients reject
> these messages.
>
> I've also submitted a bug report in the Asterisk issue tracker:
> https://issues.asterisk.org/jira/browse/ASTERISK-24807. It has a patch
> for a workaround, but it's not the correct way of addressing the problem
> (it patches pjsip library when the problem is inside res_pjsip adapter).
>
> Regards,
> Anatoli
>
>
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