Hi Juha,
in fact, next_hop should support domain names just the same (A & SRV records).
Have you tried it out?
-Raphael.
On 16.10.2012, at 11:12, Juha Heinanen wrote:
> Raphael Coeffic writes:
>
>> Now, it seems that you would like to have the next_hop behavior
>> (routing without pre-loaded route), but only for the first
>> request. Subsequent requests would be routed just normally (R-URI, or
>> Route, if present). Is that correct?
>
> raphael,
>
> yes. i would like to use outbound_proxy because it can hold domain
> name, which in turn allows sems to use more than one outbound proxy when
> the domain name maps to more than one A record. my outbound proxy will
> Record-Route the initial request and there is thus no need to force
> outbound proxy for subsequent requests.
>
> now that you have clarified the effect of outbound params, the behavior
> is ok with me.
>
> i tried to clarify the comments in sems.conf.sample (see below).
>
> -- juha
>
> -------------------------------------------------------------------------
>
> # optional parameter: outbound_proxy=uri
> #
> # - this sets an outbound proxy for dialogs and registrations initiated
> # by SEMS. A preloaded Route header containing the uri is added to
> # each initial request. The request is then sent to destination obtained
> # by resolving the uri. If outbound_proxy is not set (default setting),
> # no preloaded Route header is added and request is sent to destination
> # obtained by resolving r-uri. Resolving is done by SIP stack with DNS
> # if uri contains domain name. Warning: If uri can not be resolved, no
> # requests will be sent out at all!
> #
> # default: empty
> #
> # Example:
> # outbound_proxy=sip:proxy.mydomain.net
>
> # optional parameter: force_outbound_proxy={yes|no}
> #
> # - forces SEMS to set outbound_proxy for any requests (not just for
> # registrations and dialog initiating requests). See above what setting
> # of outbound_proxy means. This option will only have an effect if the
> # outbound_proxy option has been set, and it will break 3261 compatibility
> # in some cases; better use next_hop_ip/next_hop_port.
> #
> # default: no
> #
> # Example:
> # force_outbound_proxy=yes
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