[Freeswitch-users] Sofia - calling through gateway - duplicate RTP port in SDP

[kokoska rokoska]

My be i have a clue :-)

May be FreeSWITCH thinks that offers different IPs because I set 
"ext-rtp-ip" to public IP of my network in SIP profile gateway is in - 
FreeSWITCH runs on devel machine behind NAT...

Do you think it could be the reason? And if yes, how to avoid it?

Best regards,

kokoska.rokoska


kokoska rokoska napsal(a):
> 
> Brian West napsal(a):
>> Can you provide a bit more detail?  I can only guess what or how  
>> you're trying to use it.
>>
> 
> Well, here is what I try to do:
> 
> 1. I have two users defined in directory which are registered with 
> FreeSWITCH. Both are in same SIP profile "default" (FS UA runs at port 
> 5065).
> 
> 2. I have different SIP profile (FS UA runs at port 7001) in which I 
> have defiend gateway to my telco-provider.
> 
> 3. A make a call from one of users (see 1.) to some PSTN number.
> FreeSWITCH (UA at port 5065) receives INVITE, ask about credentials etc.
> FreeSWITCH (UA at port 7001) successfuly authorizes against my telco 
> etc. and establish media flow (183,200) from local port, say 1234, IP 
> 1.2.3.4.
> 
> 4. Than UA at port 5065 try to establish media flow (183,200) to local 
> user, but offers the same IP/port in SDP - 1.2.3.4:1234.
> 
> 5. Than both legs (my telco and local user) send RTP to same IP:port. 
> IMO it can't work. And, like I think, it don't - both legs hear nothing 
> and FreeSWITCH kills call after a while with cause: MEDIA_TIMEOUT.
> 
> 
>> How are you trying to call a registered user?
> 
> I'm not sure what you are asking. I call localy registred user by
> <action application='bridge' data='sofia/default/user%domain'/>
> and it works fine.
> 
> What don't work (see above) is to call out through gateway:
> <action application='bridge' data='sofia/gateway/gw_name/number'/>
> 
>> It's perfectly OK to  
>> receive media from two different IP's on the same port 
> 
> Yes, but there is same IP and port...
> 
>> but I smell a  
>> bug but more so a usage case we haven't tested.
>>
> 
> Not sure, but it looks like it. Or I miss something important in config 
> options.
> 
>> Provide the sip trace and the console log on pastebin and reply with  
>> the urls.
>>
> 
> Here is pastebin url:
> http://pastebin.freeswitch.org/4273
> 
> 
> Best regards,
> 
> kokoska.rokoska
> 
>> /b
>>
>> On Apr 20, 2008, at 5:42 AM, kokoska rokoska wrote:
>>
>>> Hi all,
>>>
>>> I have came into troubles with calling from localy registered user
>>> through Sofia gateway:
>>>
>>> FreeSWITCH offers the same RTP port in SDP to both call legs and thus
>>> I'm without audio and FreeSWITCH kills the call after a while with  
>>> cause
>>> MEDIA_TIMEOUT (this is not really valid cause, because media goes to
>>> FreeSWITCH from both legs, but to the same port :-)
>>>
>>> When I make call between localy registered users, everything looks  
>>> good.
>>>
>>> I really don't know what I'm doing wrong, so any clue is very
>>> appreciated :-)
>>>
>>> BTW: I have both FreeSWITCH console log and pcap dump if someone
>>> interested. And, of course, can supply any other required informations
>>> about calls.
>>>
>>> Thanks in advance, best regards
>>>
>>> kokoska.rokoska
>>>
>>>
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>> Brian West
>> sip:brian at freeswitch.org
>>
>>
>>
>>
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>>
> 
> 
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