[Freeswitch-dev] Strange behaviour in SOFIA SIP

[Anthony Minessale]

any codec manipulation techniques and proxy media mode are not
compatible.  Proxy media mode means stay completely out of the codec
negotiation process.

On Thu, Oct 20, 2011 at 3:11 PM, Visciano Giovanni
<Giovanni.Visciano at italtel.it> wrote:
> Preconditions on sip profile
> ----------------------------
> inbound-codec-prefs NOT set
> outbound-codec-prefs NOT set
> inbound-proxy-media=TRUE
> inbound-bypass-media=FALSE
> inbound-late-negotiation=TRUE + inherit_codec=TRUE
>
> TEST scenario
> -------------
> SIP phone send INVITE with SDP to FS
>
> INVITE
> SDP[codelist=PCMA, PCMU, G722, G729] --> FS
>
> FS has just the CORE_PC_MODULE [PCMA, PCMU, PASS-THR, VIDEO-PASS-THR, L16]
>
> The "ep_codec_string" channel variable is loaded with [PCMA, PCMU]
>
> EXPECTED
> --------
> In "proxy-media + late-negotiation" scenario:
> ep_codec_string=[PCMA,PCMU,G722,G729]
>
> PROBLEM
> -------
> According to the documentation
> (http://wiki.freeswitch.org/wiki/Codec_negotiation):
>
> "ep_codec_string: This variable is only available if late negotiation is
> enabled on the profile. It's a readable string containing all the codecs
> proposed by the calling endpoint."
> and
> "inherit_codec=true (only applicable when late-negotiation is enabled) will
> take the codec negotiated when the B leg answers and pass it to the A leg so
> it also uses the same codec (if the A leg supports it); otherwise, it will
> use whatever it can from its own list"
>
> The variable ep_codec_string doesn't contain ALL the codecs proposed by the
> calling endpoint. It contains the intersection between the codecs proposed
> by the calling and the codecs loaded in FS.
> In proxy-media / no-media configuration the called endpoint doesn't have the
> calling codec list so he can't negotiate using all the capabilities
> available.
> (I'm working on a test endpoint module that should work in proxy and
> no-media configuration ... mod_sofia vs mod_sofia works because they look at
> the remote sdp variable)
>
> Source reference - sofia_glue.c->sofia_glue_set_r_sdp_codec_string()
>
>
> Regards,
> Giovanni
>
>
>
> Internet Email Confidentiality Footer
>
> ********************************************************************************************************************************************
>
> La presente comunicazione, con le informazioni in essa contenute e ogni
> documento o file allegato, e' rivolta unicamente alla/e persona/e cui e'
> indirizzata ed alle altre da questa autorizzata/e a riceverla. Se non siete
> i destinatari/autorizzati siete avvisati che qualsiasi azione, copia,
> comunicazione, divulgazione o simili basate sul contenuto di tali
> informazioni e' vietata e potrebbe essere contro la legge (art. 616 C.P.,
> D.Lgs n. 196/2003 Codice in materia di protezione dei dati personali). Se
> avete ricevuto questa comunicazione per errore, vi preghiamo di darne
> immediata notizia al mittente e di distruggere il messaggio originale e ogni
> file allegato senza farne copia alcuna o riprodurne in alcun modo il
> contenuto.
>
> This e-mail and its attachments are intended for the addressee(s) only and
> are confidential and/or may contain legally privileged information. If you
> have received this message by mistake or are not one of the addressees
> above, you may take no action based on it, and you may not copy or show it
> to anyone; please reply to this e-mail and point out the error which has
> occurred.
> ********************************************************************************************************************************************
>
> _______________________________________________
> Join us at ClueCon 2011, Aug 9-11, Chicago
> http://www.cluecon.com 877-7-4ACLUE
>
> FreeSWITCH-dev mailing list
> FreeSWITCH-dev at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
> http://www.freeswitch.org
>
>



-- 
Anthony Minessale II

FreeSWITCH http://www.freeswitch.org/
ClueCon http://www.cluecon.com/
Twitter: http://twitter.com/FreeSWITCH_wire

AIM: anthm
MSN:anthony_minessale at hotmail.com
GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
IRC: irc.freenode.net #freeswitch

FreeSWITCH Developer Conference
sip:888 at conference.freeswitch.org
googletalk:conf+888 at conference.freeswitch.org
pstn:+19193869900