[pjsip] RTCP handling pjsip 1.x

Nanang Izzuddin nanang.izzuddin at gmail.com
Tue Jan 3 23:10:19 EST 2012

Hi Werner,

Honestly, we're not aware of such RTCP compound requirement in sending
RTCP packets.

Just created a ticket for this https://trac.pjsip.org/repos/ticket/1440.


On Sun, Jan 1, 2012 at 7:41 PM, Werner Dittmann
<Werner.Dittmann at t-online.de> wrote:
> Hi,
> during some recent tests I saw that pjsip does not fully implement RTCP
> according to RFC 3550, in particular set-up of RTCP compound packets,
> refer to chap 6.1.
> As noted in the subject these tests use the current  pjsip 1.x (not 2.x)
> because 2.x is not yet "production-ready", isn't it? Maybe this is already
> addressed in 2.x?
> Using wireshark I see the following problems:
> - the very first RTCP compound packet contains a SDES only. No RR, not even
>  an empty RR.
> - Pjsip sends SR without attaching an SDES packet
> - Pjsip sends a BYE packet without an RR and an SDES
> Usually this does not cause problems for RTCP implementations, however
> implementations that enforce the correct set-up of RTCP compound packets may
> discard RTCP compound packets and thus lose information.
> Best regards,
> Werner
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