[SR-Users] maddr parameter in contact header and fix_nated_contact

[Morten Isaksen]

Hi Daniel,

Sorry for the late reply. The patch is working ok.

/Morten

On Fri, Jun 1, 2012 at 1:25 PM, Morten Isaksen <misak at misak.dk> wrote:
> Hi Daniel,
>
> Thanks for a very quick response. The patch seems to work fine on
> 3.2.2. I will do some more testing later today.
>
> /Morten
>
> On Fri, Jun 1, 2012 at 11:37 AM, Daniel-Constantin Mierla
> <miconda at gmail.com> wrote:
>> Hello,
>>
>> I committed a patch to remove maddr in fix_nated_contact() as it makes no
>> sense anymore if contact uri is updated:
>>
>> http://git.sip-router.org/cgi-bin/gitweb.cgi/sip-router/?a=commit;h=c3caaa4c12f76c77381c6a0afc8688bc38b16999
>>
>> If you can give it a try and all goes ok, then I will backport.
>>
>> Cheers,
>> Daniel
>>
>>
>> On 6/1/12 9:45 AM, Morten Isaksen wrote:
>>>
>>> Hi Again,
>>>
>>> For some reason my e-mail got truncated. Here is the complete e-mail:
>>>
>>> I have this setup:
>>>
>>> Mediation server with internal ip -- NAT firewall -- Kamailio proxy --
>>> PSTN gateway
>>>
>>> The mediation server sends a contact header with maddr=<internal IP>
>>>
>>> fix_nated_contact only changes the host part and leaves the maddr intact.
>>>
>>> When the PSTN gateway sends a PRACK or a BYE it puts the <internal IP>
>>> in the RURI, and kamailio then try to forward the message directly to
>>> the <internal IP> and not the NAT ip.
>>>
>>>  From RFC 3261 19.1.1:
>>>
>>> The maddr parameter indicates the server address to be
>>> contacted for this user, overriding any address derived from
>>> the host field.  When an maddr parameter is present, the port
>>> and transport components of the URI apply to the address
>>> indicated in the maddr parameter value.  [4] describes the
>>> proper interpretation of the transport, maddr, and hostport in
>>> order to obtain the destination address, port, and transport
>>> for sending a request.
>>>
>>> I can see that OpenSIPS has fixed this.
>>>
>>> http://sourceforge.net/tracker/?func=detail&atid=1086410&aid=3312423&group_id=232389
>>>
>>> Would it be possible to get this patch into Kamailio also?
>>>
>>> /Morten
>>>
>>>
>>>
>>> On Fri, Jun 1, 2012 at 8:57 AM, Morten Isaksen <misak at misak.dk> wrote:
>>>>
>>>> Hi,
>>>>
>>>> I have this setup:
>>>>
>>>> Mediation server with internal ip -- NAT firewall -- Kamailio proxy --
>>>> PSTN gateway
>>>>
>>>> The mediation server sends a contact header with maddr=<internal IP>
>>>>
>>>> fix_nated_contact only changes the host part and leaves the maddr intact.
>>>>
>>>> When the PSTN gateway sends a PRACK or a BYE it puts the <internal IP>
>>>> in the RURI, and kamailio then try to forward the message directly to
>>>> the <internal IP> and not the NAT ip.
>>>>
>>>>
>>>>  From RFC 3261 19.1.1:
>>>>
>>>>         The maddr parameter indicates the server address to be
>>>>         contacted for this user, overriding any address derived from
>>>>         the host field.  When an maddr parameter is present, the port
>>>>         and transport components of the URI apply to the address
>>>>         indicated in the maddr parameter value.  [4] describes the
>>>>         proper interpretation of the transport, maddr, and hostport in
>>>>         order to obtain the destination address, port, and transport
>>>>         for sending a request.
>>>>
>>>>
>>>> I can see that OpenSIPS has fixed this.
>>>>
>>>> http://sourceforge.net/tracker/?func=detail&atid=1086410&aid=3312423&group_id=232389
>>>>
>>>> Would it be possible to get this patch into Kamailio also?
>>>>
>>>> --
>>>> Morten Isaksen
>>>
>>>
>>>
>>
>> --
>> Daniel-Constantin Mierla - http://www.asipto.com
>> http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
>> Kamailio Advanced Training, Seattle, USA, Sep 23-26, 2012 -
>> http://asipto.com/u/katu
>> Kamailio Practical Workshop, Netherlands, Sep 10-12, 2012 -
>> http://asipto.com/u/kpw
>>
>>
>>
>>
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>> sr-users at lists.sip-router.org
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>
>
>
> --
> Morten Isaksen



-- 
Morten Isaksen