17 Jul
2009
17 Jul
'09
12:16 p.m.
Catalina,
Klaus is right. See RFC 3261 18.2.1 ("Receiving Requests"):
When the server transport receives a request over any transport, it
MUST examine the value of the "sent-by" parameter in the top Via
header field value. If the host portion of the "sent-by" parameter
contains a domain name, or if it contains an IP address that differs
from the packet source address, the server MUST add a "received"
parameter to that Via header field value. This parameter MUST
contain the source address from which the packet was received. This
is to assist the server transport layer in sending the response,
since it must be sent to the source IP address from which the request
came.
-- Alex
Hi!
catalina oancea schrieb:
--
Alex Balashov
Evariste Systems
Web : http://www.evaristesys.com/
Tel : (+1) (678) 954-0670
Direct : (+1) (678) 954-0671
Mobile : (+1) (678) 237-1775
No, actually the value in the received parameter
is not equal to the
IP in the Via. I looked in the code and this seems to be the intended
behavior. It would be nice to be able to disable it, but I don't think
there is one.
Then it is standard conform. If the request is received from a different
address then advertised, this parameter must be added.
This is because SIP requires to send the response to the IP address from
which the request was received.
regards
klaus
Thanks anyway
Catalina
2009/7/16 Klaus Darilion <klaus.mailinglists(a)pernau.at>at>:
> catalina oancea wrote:
>> Form what I found in
>> http://lists.kamailio.org/pipermail/devel/2008-August/015080.html, it
>> seems to me that it's a bug that kamailio adds received=IP parameter
>> although force_rport was not called.
> The bug was something else.
>
>>> Does anybody know how to disable the received=IP Via parameter that
>>> is
>>> added by default from kamailio? For the case I want to disable it in,
>>> I have no NAT handling. Also, I have:
>>> dns=no
>>> rev_dns=no
>
> In this case "received" will only be added if the advertised IP is
> different
> than the IP from which the request was received. (according to RFC).
>
> So, you do not use rport but kamailio adds the received parameter and
> the
> value in the received parameter is identical to the IP in the Via?
>
> regards
> klaus
>
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