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

[Daniel-Constantin Mierla]

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