[Serusers] Sending NOTIFY messages from presence module to an SIP Proxy Server
Vaclav Kubart
vaclav.kubart at iptel.org
Mon Jun 19 17:34:02 CEST 2006
The OSER should add Record-Route headers into SUBSCRIBE requests passing
through. This seems to be not done by it (but the dump you have sent
shows truncated messages, thus they may be hidden).
You are right, I think, the record_route should be called on OSER too.
Vaclav
On Mon, Jun 19, 2006 at 04:28:13PM +0200, Anton Schula wrote:
> Hi Vaclav,
>
>
> thank you for the very, very quick reply!
>
> Overview captured with tethereal at SER-PA_RLS:
> Capturing on eth0
> 1 0.000000 OSER -> SER-PA_RLS SIP Request: PUBLISH sip:anton.schula at sip.domain.net
> 2 0.000364 OSER -> SER-PA_RLS SIP Request: SUBSCRIBE sip:anton.schula at sip.domain.net
> 3 0.003075 SER-PA_RLS -> OSER SIP Status: 200 OK
> 4 0.003579 SER-PA_RLS -> OSER SIP Status: 200 OK
> 5 0.003704 SER-PA_RLS -> UA SIP Request: NOTIFY sip:anton.schula at UA:7944
> 6 0.095282 OSER -> SER-PA_RLS SIP Request: PUBLISH sip:anton.schula at sip.domain.net
> 7 0.095796 SER-PA_RLS -> OSER SIP Status: 200 OK
> 8 0.174615 OSER -> SER-PA_RLS SIP Request: SUBSCRIBE sip:anton.schula at sip.domain.net
> 9 0.175103 SER-PA_RLS -> OSER SIP Status: 200 OK
> 10 0.526255 SER-PA_RLS -> UA SIP Request: NOTIFY sip:anton.schula at UA:7944
> 11 0.552488 OSER -> SER-PA_RLS SIP Request: PUBLISH sip:anton.schula at sip.domain.net
> 12 0.552977 SER-PA_RLS -> OSER SIP Status: 200 OK
> 13 0.725375 OSER -> SER-PA_RLS SIP Request: SUBSCRIBE sip:anton.schula at sip.domain.net
> 14 0.725446 SER-PA_RLS -> OSER SIP Status: 200 OK
> 15 1.226364 SER-PA_RLS -> UA SIP Request: NOTIFY sip:anton.schula at UA:7944
> 16 1.586292 OSER -> SER-PA_RLS SIP Request: SUBSCRIBE sip:anton.schula at sip.domain.net
> 17 1.586708 SER-PA_RLS -> OSER SIP Status: 489 Unsupported event package
> 18 2.167297 OSER -> SER-PA_RLS SIP Request: SUBSCRIBE sip:anton.schula at sip.domain.net
> 19 2.167806 SER-PA_RLS -> OSER SIP Status: 489 Unsupported event package
> 20 3.466258 SER-PA_RLS -> UA SIP Request: NOTIFY sip:anton.schula at UA:7944
> 21 7.386253 SER-PA_RLS -> UA SIP Request: NOTIFY sip:anton.schula at UA:7944
> 22 11.236379 SER-PA_RLS -> UA SIP Request: NOTIFY sip:anton.schula at UA:7944
>
> The SER-PA_RLS tries to send out SIP NOTIFY directly to the client machine (called UA here).
> As this is UDP these packages are visible even though the firewall drops them.
>
> Details captured with ngrep anton.schula@ port 5060 in the attachment ngrep.out.
>
> I use a recored_route for all messages in the ser.cfg of SER-PA_RLS. Do I need this as well before the forward in the OSER ser.cfg?
>
> if (method=="SUBSCRIBE" and src_ip!=SER-PA_RLS_IP ||
> method=="NOTIFY" and src_ip!=SER-PA_RLS_IP ||
> method=="PUBLISH" and src_ip!=SER-PA_RLS_IP) {
>
> # needed here? On OSER
> record_route();
>
> forward_udp(SER-PA_RLS_IP,5060);
> exit;
> };
>
> The OSER belongs to somebody else, I need to ask him whether he has a record_route() in the config file.
>
>
>
> best regards
> Toni
>
>
>
>
> -------- Original-Nachricht --------
> Datum: Mon, 19 Jun 2006 15:49:19 +0200
> Von: Vaclav Kubart <vaclav.kubart at iptel.org>
> An: Anton Schula <anton.schula at gmx.at>
> Betreff: Re: [Serusers] Sending NOTIFY messages from presence module to an SIP Proxy Server
>
> > Hi,
> > NOTIFYs should be sent via dialog routes (created by Record-Routes in
> > SUBSCRIBE request). Please could you attach message dump from
> > SER-PA_RLS? (by ngrep for example)
> >
> > May be, that you don't see NOTIFYs because they are "eaten" by loose
> > route processing on OSER (try to watch with ngrep on that machine if you
> > see a NOTIFY).
> >
> > Vaclav
> >
> > On Mon, Jun 19, 2006 at 03:41:29PM +0200, Anton Schula wrote:
> > > Hello,
> > >
> > >
> > > I have a routing problem with SER and OpenSer regarding presence
> > > NOTIFY messages.
> > >
> > > I want to use OpenSer (OSER in the diagram below) as SIP registrar and
> > > for routing SIP messages (which is working perfectly). And I have a
> > > separate SER with the PA and RLS modules (called SER-PA_RLS). This one
> > > also works perfectly when used as standalone server.
> > >
> > > Now I have configured the OSER to forward PUBLISH and SUBSCRIBE
> > > messages to the SER-PA_RLS. This part is O.K., messages are routed
> > > from the client over the OSER to SER-PA_RLS, reply messages travel
> > > back from SER-PA_RLS to the OSER and from there to the client. That's
> > > O.K., so OSER apears to have correct routing.
> > >
> > > But NOTIFY messages originating at the SER-PA_RLS are sent directly to
> > > the client, using the clients contact address.
> > >
> > > How can I configure SER-PA_RLS to send the NOTIFY messages via the
> > > OSER? In fact, this is all that SER-PA_RLS shall send to the outside
> > > world. All routing decissions shall be done in the OSER. The
> > > SER-PA_RLS should not be directly accessed (a firewall is in place).
> > >
> > >
> > > Call Flows:
> > > ===========
> > >
> > > Messages from Client to Presence server are O.K.
> > > OSER routes them to the SER-PA_RLS.
> > > Responses travel back via OSER.
> > >
> > > ###### ######## ##############
> > > # UA # # OSER # # SER-PA_RLS #
> > > ###### ######## ##############
> > > | | |
> > > |----PUBLISH--->| |
> > > | |----PUBLISH---->|
> > > | |<-----OK------- |
> > > |<------OK------| |
> > > | | |
> > > | | |
> > > |---SUBSCRIBE-->| |
> > > | |---SUBSCRIBE--->|
> > > | |<-----OK------- |
> > > |<------OK------| |
> > > | | |
> > > | | |
> > > | | |
> > >
> > >
> > > Intended route of NOTIFY messages:
> > >
> > > ###### ######## ##############
> > > # UA # # OSER # # SER-PA_RLS #
> > > ###### ######## ##############
> > > | | |
> > > | |<----NOTIFY-----|
> > > |<----NOTIFY----| |
> > > |-------OK----->| |
> > > | |-------OK------>|
> > > | | |
> > > | | |
> > >
> > >
> > > Observed route of NOTIFY messages:
> > >
> > > ###### ######## ##############
> > > # UA # # OSER # # SER-PA_RLS #
> > > ###### ######## ##############
> > > | | |
> > > | | |
> > > |<-------------NOTIFY------------|
> > > |----------------OK------------->|
> > > | | |
> > > | | |
> > >
> > > (In fact I only see the UDP SIP NOTIFY leavin the SER-PA_RLS machine.
> > The firewall blocks this message, so the client nevers receives it.)
> > >
> > >
> > > I tried several configurations in ser.cfg, including
> > > ...
> > > if (method=="NOTIFY") {
> > > log(1,"NOTIFY forwarded to OSER\n");
> > > forward(OSER-hostname,5060);
> > > }
> > > ...
> > >
> > > I never saw the log message. I think, that sending out messages from
> > > the SER or at least the presence module is independend from routing in
> > > the ser.cfg.
> > >
> > > Can anybody tell me how to forward all outgoing messages to the OSER?
> > >
> > > Many thank's in advance!
> > >
> > > best regards
> > > A. Schula
> > >
> > >
> > >
> > > PS: For your information
> > > On OSER, I simply use this
> > >
> > > if (method=="SUBSCRIBE" and src_ip!=SER-PA_RLS_IP ||
> > > method=="NOTIFY" and src_ip!=SER-PA_RLS_IP ||
> > > method=="PUBLISH" and src_ip!=SER-PA_RLS_IP) {
> > > forward_udp(SER-PA_RLS_IP,5060);
> > > exit;
> > > };
> > >
> > >
> > >
> > > --
> > >
> > >
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> > > _______________________________________________
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>
> --
>
>
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