[OpenSIPS-Users] RTPProxy nortpproxy_str issue

[Seth Schultz]

Muhammad,

I don't know what the remote carrier is using for their RTP.  I set a 
custom nortpproxy_str to try and avoid this (instead of leaving it as 
the default a=nortpproxy:yes).  Is it correct for them to leave our 
custom a=schipmangled:yes record in the SDP?  I have had problems with 
the "f" flag and failover routing (basically rewrites the IP in the SDP 
twice like this yyy.yyy.yyy.yyyyyy.yyy.yyy.yyy).  Is there an easy way 
for me to just remove the a=schipmangle:yes in my onreply_route?

Thanks,
Seth

On 2/14/2013 8:28 PM, Muhammad Shahzad wrote:
> You mean both you and your carrier are using their own rtp-proxy? If 
> so, then simply add "f" flag to rtpproxy_offer | rtpproxy_answer. 
> Which will allow you can you carrier to create a chain of rtp-proxy 
> together. See flags description here,
>
> http://www.opensips.org/html/docs/modules/devel/rtpproxy.html#id292744
>
> Thank you.
>
>
> On Fri, Feb 15, 2013 at 2:18 AM, Seth Schultz 
> <sschultz at scholarchip.com <mailto:sschultz at scholarchip.com>> wrote:
>
>     Hello,
>
>     I am having a problem with RTPProxy where in the reply, the remote
>     carrier is sending the "nortpproxy_str" in the reply SDP (example
>     below).  I would like to know what the best way is to detect this,
>     and remove it from the sip message before calling rtpproxy_answer
>     function, because rtpproxy_answer will fail if the nortpproxy_str
>     already exists in the SDP.
>
>     Thanks in advance,
>     Seth
>
>     U 2013/02/14 19:32:21.142567 yyy.yyy.yyy.yyy:5060 ->
>     xxx.xxx.xxx.xxx:5060
>     INVITE sip:19999999999 at xxx.xxx.xxx.xxx SIP/2.0
>     Via: SIP/2.0/UDP yyy.yyy.yyy.yyy:5060;branch=z9hG4bK2d9e.187ebf5.0
>     Max-Forwards: 69
>     From: "Unknown" <sip:19999999999 at yyy.yyy.yyy.yyy>;tag=33XjNy6SQZrQS
>     To: <sip:19999999999 at yyy.yyy.yyy.yyy>
>     Call-ID: 004c5840-f1aa-1230-9c93-6320dec8e883
>     CSeq: 40108106 INVITE
>     Contact: <sip:yyy.yyy.yyy.yyy;did=3901.59b3bb21>
>     User-Agent: FS1
>     Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, UPDATE, INFO,
>     REGISTER, REFER, NOTIFY
>     Supported: timer, precondition, path, replaces
>     Allow-Events: talk, hold, refer
>     Content-Type: application/sdp
>     Content-Disposition: session
>     Content-Length: 247
>     P-Call-Type: Notification
>     X-FS-Support: update_display,send_info
>     Remote-Party-ID: "Unknown"
>     <sip:19999999999 at yyy.yyy.yyy.yyy>;party=calling;screen=yes;privacy=off
>
>     v=0
>     o=FreeSWITCH 1360855702 1360855703 IN IP4 yyy.yyy.yyy.yyy
>     s=FreeSWITCH
>     c=IN IP4 yyy.yyy.yyy.yyy
>     t=0 0
>     m=audio 40562 RTP/AVP 0 8 3 101
>     a=rtpmap:101 telephone-event/8000
>     a=fmtp:101 0-16
>     a=silenceSupp:off - - - -
>     a=ptime:20
>     a=schipmangled:yes  <--- rtpproxy added this on initial invite
>
>     ...
>
>     U 2013/02/14 19:32:37.425606 xxx.xxx.xxx.xxx:5060 ->
>     yyy.yyy.yyy.yyy:5060
>     SIP/2.0 200 OK
>     Via: SIP/2.0/UDP yyy.yyy.yyy.yyy:5060;branch=z9hG4bK2d9e.187ebf5.0
>     From: "Unknown" <sip:19999999999 at yyy.yyy.yyy.yyy>;tag=33XjNy6SQZrQS
>     To: <sip:19999999999 at yyy.yyy.yyy.yyy>;tag=SDs07f299-gK0e9f2e8d
>     Call-ID: 004c5840-f1aa-1230-9c93-6320dec8e883
>     CSeq: 40108106 INVITE
>     Accept: application/sdp, application/isup, application/dtmf,
>     application/dtmf-relay,  multipart/mixed
>     Contact: <sip:xxx.xxx.xxx.xxx;did=39.60d51ef>
>     Allow:
>     INVITE,ACK,CANCEL,BYE,REGISTER,REFER,INFO,SUBSCRIBE,NOTIFY,PRACK,UPDATE,OPTIONS
>     Require: timer
>     Supported: timer
>     Session-Expires: 7200;refresher=uas
>     Content-Length: 259
>     Content-Disposition: session; handling=required
>     Content-Type: application/sdp
>
>     v=0
>     o=Sonus_UAC 7607 20874 IN IP4 xxx.xxx.xxx.xxx
>     s=SIP Media Capabilities
>     c=IN IP4 xxx.xxx.xxx.xxx
>     t=0 0
>     m=audio 29772 RTP/AVP 0 101
>     a=rtpmap:101 telephone-event/8000
>     a=fmtp:101 0-16
>     a=silenceSupp:off - - - -
>     a=schipmangled:yes  <--- they sent this back in the 200 OK reply
>     a=ptime:20
>     a=sendrecv
>
>
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>
>
>
> -- 
> Muhammad Shahzad
> -----------------------------------
> CISCO Rich Media Communication Specialist (CRMCS)
> CISCO Certified Network Associate (CCNA)
> Cell: +49 176 99 83 10 85
> MSN: shari_786pk at hotmail.com <mailto:shari_786pk at hotmail.com>
> Email: shaheryarkh at googlemail.com <mailto:shaheryarkh at googlemail.com>
>
>
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