[SR-Users] fix_nated_contact and IPv6

[Klaus Darilion]

Sounds like a bug.

Anyway, as fix_nated_contact is not standard conform, it is better to
use handle_ruri_alias() and add_contact_alias() (see the Kamailio
default config file). Maybe they handle also IPv6 correct.

regards
Klaus

On 22.01.2015 16:26, Sebastian Damm wrote:
> Hi,
> 
> I'm trying to set up a Kamailio (4.1.3) server which converts between
> IPv6 and IPv4. Everything looks pretty good. Now I have a test client
> which sends packets via IPv6, but in contact header, SDP etc. there are
> still IPv4 addresses. (This comes from some converting from v4 to v6
> earlier.) Thus, Kamailio tries to do a fix_nated_contact(). But after
> fixing, the Contact URI is wrong.
> 
> Example:
> inbound
> Contact: <sip:bob at 192.168.8.132 <mailto:sip%3Abob at 192.168.8.132>>
> 
> outbound
> Contact: <sip:bob at 1234:1234:0:1234:0:0:0:2>
> 
> The correct way of transforming the Contact URI would be:
> Contact: <sip:bob@[1234:1234:0:1234:0:0:0:2]>
> 
> This incorrect Contact URI doesn't hurt first, but when the called party
> wants to hang up the call, it addresses the URI from Contact header, and
> Kamailio can't parse the Request URI:
> 
> 
> Jan 22 12:03:48 router /usr/sbin/kamailio[21309]: ERROR: pv
> [pv_core.c:304]: pv_get_ruri_attr(): failed to parse the R-URI
> Jan 22 12:03:48 router /usr/sbin/kamailio[21309]: ERROR: rr
> [loose.c:934]: loose_route(): failed to parse Request URI
> Jan 22 12:03:48 router /usr/sbin/kamailio[21309]: ERROR: domain
> [domain.c:140]: is_uri_host_local(): error while parsing R-URI
> 
> 
> Is this a bug in the nathelper module? Was it never meant to handle IPv6
> addresses? Or do I understand something wrong?
> 
> Best Regards,
> Sebastian
> 
> 
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