[sr-dev] dns= and rev_dns= parameter

[Iñaki Baz Castillo]

2009/7/8 Klaus Darilion <klaus.mailinglists at pernau.at>:

>> This parameter controls if the SIP server will try doing a DNS lookup
>> on the address in the Via header of a received sip request to decide
>> if adding a received=<src_ip> parameter to the Via is necessary. Note
>> that Vias containing DNS names (instead of IPs) should have received=
>> added, so turning dns to yes is not recommended.
>>
>> Default is no.
>
> Does this mean that, if the Via header in the received message contains a
> domain and:
>
> dns=yes, a lookup is done, and if the domain resolves to the src_ip, then
> the "received" parameter is not added, but only added when the domain
> resolves to a different IP address?

This is not RFC 3261 compliant. "received" MUST be added if the Via
"sent-by" field is a domain/hostname, always.


> dns=no: the "received" parameter is always added?

This is the correct behavior.





-- 
Iñaki Baz Castillo
<ibc at aliax.net>