[Freeswitch-users] freeswitch not replying on port according to srv-record

[Michel Brabants]

Hello Lawrence,

thanks for the quick response. I'll have a further look, but this makes
srv-records almost useless in my case. I'll probably use the option to send
always back to the receiver-ports. There is no way for me that the
rport-field to the via-header and normally it would be obtainable from the
srv-record if it was used ...

Thanks,

Michel

On Mon, Apr 22, 2013 at 7:05 PM, Lawrence Conroy <lconroy at insensate.co.uk>wrote:

> Hi There,
>  have you looked at <http://www.ietf.org/rfc/rfc3263.txt>, and in
> particular section 5 on page 11?
>
> IIUC, you're asking for an SRV lookup when the server sends a 100 trying
> back towards the UAC.
>
> For the terminally lazy, here's the second paragraph of 3263 section 5:
>    A server, according to RFC 3261 [1], will send a response on the
>    connection it arrived on (in the case of reliable transport
>    protocols), and for unreliable transport protocols, to the source
>    address of the request, and the port in the Via header field.  The
>    procedures here are invoked when a server attempts to send to that
>    location and that response fails (the specific conditions are
>    detailed in RFC 3261). "Fails" is defined as any closure of the
>    transport connection the request came in on before the response can
>    be sent, or communication of a fatal error from the transport layer.
>
> I'm assuming that the via in your INVITE did not include a port, so the
> UAS should send it back to the default port, according to 3263.
> If it did have an explicit port value, then I'd kinda guess that that's
> where it would be sent.
>
> i.e., it looks to me like fS is performing as the SIP standard requires.
>
> all the best,
>   Lawrence
>
> On 22 Apr 2013, at 16:30, Michel Brabants wrote:
> > I'm taling here about the trying that freeswitch sends in response to
> the invite. It goes to the wrong port (5060 instead of 5062).
> > Michel
> >
> > On Mon, Apr 22, 2013 at 5:28 PM, Michel Brabants
> > <michel.brabants at gmail.com>wrote:
> >> Hello,
> >>
> >> one more question. While performing tests, I noticed that freeswitch
> >> didn't respond to the port that is specified in the srv-record, which
> is in
> >> the contact-address. This is when it receives an incoming invite in one
> of
> >> the defined gateways in freeswitch. The srv-record has 5062 in it, but
> >> freeswitch doesn't seem to try to resolve the srv-record.
> >>
> >> Kind regards,
> >>
> >> Michel
>
>
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