[Serusers] Anyway to steal Media IP/Port from RTPProxy or MediaProxy

[Hoa Thai Duy]

Dear expert Greger
 
Actually, in Case 1, the BYE from SIP UA reached Asterisk, and Asterisk just
hangup the SIP channel, and don't send it to ITSP. 
In case 2, It does, and remote phone hangup normally.
 
I captured the Asterisk log, and see no differrence between the 02 BYE
message in Case 1 and Case 2, but call-id.
 
Where could it be the issue, or it's the limitation of the Asterisk kernel?
 
Tks & brgds
 
Hoa
 

  _____  

From: Greger V. Teigre [mailto:greger at teigre.com] 
Sent: Friday, June 23, 2006 9:54 PM
To: Hoa Thai Duy
Cc: serusers at iptel.org
Subject: Re: [Serusers] Anyway to steal Media IP/Port from RTPProxy or
MediaProxy


Ad case 1, you may have a problem with the routing of the BYE. You just have
to track where it stops.
As for the problem in inself: To me it looks more like an Asterisk question
and not a SER question?!
g-)

Hoa Thai Duy wrote: 

Dear Greger & List
 
Actually, I want Asterisk to deploy re-INVITE to let the media flow directly
between my UAs and ITSPs (neither relay via RTP/MediaProxy and Asterisk
RTP).
Case 1:
If I forward it to Asterisk and use re-INVITE in sip.conf
exten => _X.,1,Answer()
exten => _X.,2,Dial(SIP/Number at ITSP)
exten => _X.,3,Hangup
 
Asterisk actually open RTP with UAs and have the c=/m= info because of
Answer. But I faced the re-INVITE with call drop-off issue.
When both parties are talking, if remote phone from ITSP hang up, things are
fine. If UA hang up, remote phone is still in talking status, and I see no
BYE from Asterisk send to ITSP, even it receive BYE from UA
 
 
  
Case 2:
If I forward it to Asterisk and not use re-INVITE in sip.conf
exten => _X.,1,Answer()
exten => _X.,2,Dial(SIP/Number at ITSP)
exten => _X.,3,Hangup
 
Everything is fine
 

Case 3:
If I forward it to Asterisk and use re-INVITE in sip.conf
 
exten => _X.,1,Dial(SIP/Number at ITSP)
exten => _X.,2,Hangup
 
Asterisk don't actually open RTP with UAs and don't have the c=/m= info. At
that time, c= and m= from UAs to Asterisk always point to RFC1918, and also
in Asterisk's memory knowledge.
If this case, when re-INVITE happen, the re-INVITE to ITSP contain RFC1918
IP, and cause wrong media path.
 
Pls. advice
 
Brgds
 
Hoa
 
 

  _____  

From: Greger V. Teigre [mailto:greger at teigre.com] 
Sent: Thursday, June 22, 2006 7:02 PM
To: Hoa Thai Duy
Cc: serusers at iptel.org
Subject: Re: [Serusers] Anyway to steal Media IP/Port from RTPProxy or
MediaProxy


I would think you are better off forwarding the INVITE to Asterisk?!
g-)

Hoa Thai Duy wrote: 

Hi List 

I want to get to c= and m= value after use_media_proxy or force_rtp_proxy
(after real RTP flow between UA and media/rtpproxy)

I want this in order to steal this pair of information, and bypass the
RTPProxy/MediaProxy and use this information for UA to talk with other
application server (eg. Asterisk)

Pls. help 

Brgds 




  _____  


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