[Freeswitch-users] Modifying SDPs for SIPREC

[Siri MM]

Thanks Moy, just wondering if you have patched up latest freeswitch with
these changes done for the SBC product?

Well, my requirement is to send recorded files to a recording server in a
SIPREC compliant way - it can be a single mixed stream at this point in
time. In order to send out an INVITE which is SIPREC compliant, I have been
able to make a few changes to the source to add a sip.src feature tag to
the CONTACT header, but was able to re-use the existing freeswitch sip
options for most of the other requirements such as using
media_audio_mode, sip_h_Require, sip_append_audio_sdp and
sip_mp_application/rs-metadata for the metadata xml.

I am yet to test this INVITE against a recording server though - do you
suggest any open source servers?


On Thu, Mar 13, 2014 at 7:33 AM, Moises Silva <moises.silva at gmail.com>wrote:

>
> On Tue, Mar 11, 2014 at 12:26 AM, Siri MM <sirimmfs at gmail.com> wrote:
>
>> Hi,
>>
>> I am trying to come up with a simplified SIPREC compliant client, which
>> would playback an existing recorded file to a third party server. It is a
>> requirement of SIP RFC that the INVITE message from the SIPREC client has
>> SDP attributes such as a=sendonly, a=label and so on. Further  Contact URI
>> in the SIP header needs to be updated to include '+sip.src' feature tag,
>> "siprec" option tag in the Require header etc.
>>
>> I was wondering if this is achievable in freeswitch in it's current
>> state? Or am I required to come up with my own mod, such as mod_oreka, to
>> send the INVITE with the required headers?
>>
>
> At Sangoma we did the SIPREC modifications to mod_sofia (e.g even adding a
> new file particularly for siprec) for our SBC product.
>
> I can say the modifications to be decently complaint (e.g supporting XML
> recording meta data and separate streams) are non-trivial (not just one
> tweak here and there)
>
> But I guess it's possible (depending on who you're trying to interop with)
> that you could get away with doing less than that.
>
> Moy
>
>
> *Moises Silva**Manager, Software Engineering*
>
> msilva at sangoma.com
>
> Sangoma Technologies
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